WO2012029288A1 - Image display device and image display method - Google Patents

Image display device and image display method Download PDF

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Publication number
WO2012029288A1
WO2012029288A1 PCT/JP2011/004820 JP2011004820W WO2012029288A1 WO 2012029288 A1 WO2012029288 A1 WO 2012029288A1 JP 2011004820 W JP2011004820 W JP 2011004820W WO 2012029288 A1 WO2012029288 A1 WO 2012029288A1
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WO
WIPO (PCT)
Prior art keywords
moving image
light source
area
display
region
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PCT/JP2011/004820
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French (fr)
Japanese (ja)
Inventor
亮 赤岡
秀喜 安部
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パナソニック株式会社
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Publication of WO2012029288A1 publication Critical patent/WO2012029288A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to the screen

Definitions

  • the present invention relates to an image display apparatus and an image display method provided with a light source for backlighting a display panel.
  • the present invention relates to a light source control technique related to moving image display.
  • a backlight type is known in which a display panel is illuminated by a light source such as a cold cathode tube lamp (CCFL) or a light emitting diode (LED) in order to achieve good image quality.
  • a light source arrangement method there are a direct type arranged behind the display panel, an edge type arranged with a light source substantially on the same plane as the light guide plate provided behind the display panel, and the like.
  • the backlight method can increase the brightness of the display screen, but it involves problems such as uneven brightness and reduced image quality (moving image blur, etc.) when displaying moving images.
  • a method for suppressing a deterioration in image quality when a moving image is displayed by driving control of the light source is considered. For example, dividing the display area into a plurality of blocks, arranging a plurality of light sources corresponding to each divided block, turning off the light sources corresponding to the blocks in the display area where the moving image is displayed, etc. Display devices that suppress the display have been proposed (see, for example, Patent Documents 1 to 3).
  • the first conventional image display device 100 has a scanning period of the moving image region 102 when there is one region (hereinafter abbreviated as “moving image region”) in which the object 101 moves in the display screen.
  • moving image region the region in which the object 101 moves in the display screen.
  • the blur of the moving image peculiar to the liquid crystal television or the like could be improved by turning off the light sources A and B and providing the black insertion period TB for black insertion.
  • the black insertion period TB is provided by turning off the light sources A and B during the scanning period of the moving image area 102 to perform black insertion.
  • black insertion is not performed on the moving image region 104 and moving image blur cannot be suppressed.
  • FIG. 14A shows a second conventional image display device capable of suppressing moving image blur even when there are a plurality of moving image areas in the display screen.
  • the display screen of the image display device 110 is divided into two upper and lower display areas, and the light sources A and B corresponding to the respective display areas are individually driven and controlled to perform black insertion into the moving image areas 102 and 104. (This is referred to as “double blinking”). Specifically, by setting the black insertion period TB1 of the light source A and the black insertion period TB2 of the light source B for each of the moving image areas 102 and 104, moving image blur can be suppressed even when there are a plurality of moving image areas. .
  • the luminance on the display screen due to the lighting of the light sources A and B gradually decreases from the upper and lower ends toward the center within the illumination range of the illumination light. Therefore, in the CR region where the illumination lights from the light sources A and B overlap, even if one of the light sources A and B is turned off, it is affected by the other light source, so that complete black insertion is not achieved. That is, when the drive control is individually performed on the light sources A and B, crosstalk occurs due to mutual influence. For example, when the moving image area 104 is in the CR area and a part of the moving image area 102 is included in the CR area, the effect of black insertion in the black insertion periods TB3 and TB4 is reduced. In particular, the moving image area 104 is greatly affected by the light source B even if the light source A is turned off, and the effect of black insertion is reduced.
  • the present invention provides an image display apparatus and an image display method for suppressing image quality degradation when a moving image area exists in a display area in a backlight type image display apparatus that illuminates a display area of a display panel with a plurality of light sources.
  • the purpose is to do.
  • An image display device includes a display panel having a display area that displays an image corresponding to an input video signal, and a display control unit that writes image data based on the video signal to the display area.
  • a first light source and a second light source that illuminate the display area of the display panel, and a light source controller that controls turning on and off of the first light source and the second light source, and the display area includes:
  • the first light source and the second light source each have an overlapping illumination display area that is illuminated with an amount of light of a predetermined level or more, and the light source control unit is located in the display area of the display panel based on the video signal.
  • the existence area in the display area of the extracted moving image area is determined, and the moving image area is determined to be included in the overlapping illumination display area
  • The, during the write period of the image data for the moving picture area by said display control unit turns off the first light source and the second light source.
  • An image display device includes a display panel having a display area for displaying an image corresponding to an input video signal, and display control for writing image data based on the video signal to the display area.
  • N N is an integer of 2 or more
  • first light source to N light source for illuminating the display area of the display panel
  • light source control for controlling turning on and off of the first light source to N light source
  • the display area is overlapped and illuminated by the kth light source (k is an integer from 1 to (N ⁇ 1)) and the (k + 1) light source, each being overlapped with a light amount of a predetermined level or more.
  • the light source control unit extracts a moving image region including a moving image in the display region of the display panel based on the video signal, and determines an existing region in the display region of the extracted moving image region. ,
  • the video area When said duplication is determined to be included in the illumination display region, during the write period of the image data for the moving picture area by said display control unit turns off the first k light source and the (k + 1) th light source.
  • An image display method is a display control for writing image data based on an input video signal to a display area of a display panel and displaying an image corresponding to the video signal in the display area.
  • a light source control step for controlling turning on and off of the first light source and the second light source that illuminate the display area of the display panel, and the display area of the display panel extracted based on the video signal
  • the light source control step includes the first light source and the second light source. Source to turn off the.
  • FIG. 1 It is a block diagram which shows the structure of the image display apparatus in Embodiment 1 of this invention. It is a rear view of the image display apparatus in Embodiment 1 of this invention. It is a side view of the image display apparatus in Embodiment 1 of this invention. It is a lighting characteristic figure of the light source of the image display apparatus in Embodiment 1 of this invention. It is a drive waveform figure of the light source of the image display apparatus in Embodiment 1 of this invention. It is a figure which shows an example of the display state of the moving image in Embodiment 1 of this invention. It is a figure which shows an example of the display state of the moving image in Embodiment 1 of this invention.
  • Embodiment 1 of this invention It is a flowchart which shows light source control in case the one moving image area
  • the present device an image display device of the present invention
  • the image display device has a light source that illuminates the display screen. If it is, it is not limited to a liquid crystal display device.
  • FIG. 1 is a block diagram showing a configuration of the apparatus 1 according to Embodiment 1 of the present invention.
  • FIG. 2 a is a rear view of the apparatus 1.
  • FIG. 2 b is a side view of the apparatus 1.
  • FIG. 2 c is a lighting characteristic diagram of the light source of the apparatus 1.
  • the apparatus 1 includes a display unit 2, a light source control unit 8, and a display control unit 9.
  • the display unit 2 includes a liquid crystal display panel 4 and light sources 5 and 6.
  • the liquid crystal display panel 4 has a display area 40 (FIG. 2a) including a plurality of pixels arranged in a matrix in the horizontal and vertical directions.
  • the light source control unit 8 controls the light sources 5 and 6 based on the input video signal.
  • the display control unit 9 uses a data signal line and a scanning signal line for the display area 40 of the liquid crystal display panel 4, and in the first embodiment, the pixel array arranged in the horizontal direction at the upper end of the liquid crystal display panel 4.
  • the image data based on the input video signal is written once for each pixel from the pixel row to the pixel array arranged in the horizontal direction at the lower end, thereby generating one frame image.
  • the display controller 9 repeats the generation of an image of one frame at a predetermined frame frequency, so that an image displayed on the display area 40 of the liquid crystal display panel 4 is visually recognized by an observer.
  • the apparatus 1 includes a display unit 2 including a liquid crystal display panel 4 and the like, and a holding table 3 for holding the display unit 2. Further, on the back side of the liquid crystal display panel 4 of the display unit 2, a light source 5 as an aggregate of a plurality of backlight LEDs 51, 52,. Similarly, a light source 6 as an aggregate of a plurality of LEDs 61, 62,..., 6n for backlight is arranged at the lower end of the display area 40.
  • the light sources 5 and 6 are not limited to LEDs, and other semiconductor light emitting materials can be used.
  • a light guide plate 7 is disposed on the back surface of the liquid crystal display panel 4 of the display unit 2 at a position connecting the light source 5 and the light source 6, and illumination light from the light sources 5 and 6 is emitted into a surface by the light guide plate 7.
  • the display area 40 is illuminated after the conversion.
  • the light source 5 illuminates a substantially upper part of the display area 40 and the light source 6 illuminates a substantially lower part of the display area 40, so that the entire area of the display area 40 is illuminated with a predetermined brightness.
  • FIG. 2 c shows the luminance distribution of the light guide plate 7 based on the light sources 5 and 6 and shows the lighting characteristics of the light sources 5 and 6.
  • the luminance 5L of the light source 5 gradually decreases in accordance with the distance from the light source 5 (the distance from the upper end of the display area 40 of the liquid crystal display panel 4 of the display unit 2) in the illumination light irradiation range 5A of the light source 5. Further, the luminance 6L of the light source 6 gradually decreases in accordance with the distance from the light source 6 (the distance from the lower end of the display area 40 of the liquid crystal display panel 4 of the display unit 2) in the illumination light irradiation range 6A of the light source 6.
  • the display area 40 of the present apparatus 1 the area from the upper end of the display area 40 of the liquid crystal display panel 4 of the display unit 2 to the position of the threshold value TH1 is illuminated only by the light source 5 or mainly by the light source 5.
  • the area from the lower end of the display area 40 of the panel 4 to the position of the threshold TH2 is illuminated only by the light source 6 or mainly by the light source 6.
  • the range of the display area 40 illuminated from the light sources 5 and 6 is set as the overlapping illumination range OL.
  • the threshold TH1 is set in advance, for example, when the luminance 6L of the light source 6 is within a range of 10 to 20% of the maximum luminance (luminance at the lower end of the display area 40 of the liquid crystal display panel 4). The position is set to (for example, 10% of the maximum luminance).
  • the threshold value TH2 is set to a preset brightness (for example, 10% of the maximum brightness) in a range of 10 to 20% of the maximum brightness (the brightness at the upper end of the display area 40 of the liquid crystal display panel 4), for example. ). Accordingly, the overlapping illumination range OL from the threshold value TH1 to the threshold value TH2 is illuminated by the light sources 5 and 6 with a light amount equal to or higher than a predetermined level (for example, 10% of the maximum luminance). Further, the area from the upper end of the display area 40 to the threshold value TH1 is mainly illuminated by the light source 5, and the area from the lower end of the display area 40 to the threshold value TH2 is mainly illuminated by the light source 6.
  • a preset brightness for example, 10% of the maximum brightness
  • the display area 40 of the liquid crystal display panel 4 of the present apparatus 1 includes a first illumination display area 41 mainly illuminated by the light source 5 and a second illumination display area mainly illuminated by the light source 6. 42 and an overlapping illumination display area 43 that is illuminated by light sources 5 and 6 in an overlapping manner.
  • the overlapping illumination display area 43 is an area from the position of the threshold value TH1 to the position of the threshold value TH2, and is an area that is overlappedly illuminated by the light sources 5 and 6 with a light amount of a predetermined level or more.
  • the first illumination display area 41 is adjacent to the first light source 5 side of the overlapping illumination display area 43, and is an area from the upper end of the display area 40 of the liquid crystal display panel 4 to the position of the threshold TH1, and is mainly illuminated by the light source 5. Area. In other words, the amount of illumination light that illuminates the first illumination display area 41 is larger than the amount of illumination light from the light source 6.
  • the second illumination display area 42 is adjacent to the second light source 6 side of the overlapping illumination display area 43, and is an area from the lower end of the display area 40 of the liquid crystal display panel 4 to the position of the threshold TH2, and is mainly illuminated by the light source 6. Area. In other words, the amount of illumination light that illuminates the second illumination display area 42 is greater than the amount of illumination light from the light source 5.
  • writing of image data to the display area 40 of the liquid crystal display panel 4 of the display unit 2 is performed from the upper end to the lower end of the display area 40 by the display control unit 9 as described above.
  • the light source control unit 8 includes a threshold storage unit 80, a light source luminance setting unit 81, a moving image region extracting unit 82, an existing region determining unit 83, a moving image priority determining unit 84, a PWM control unit 85, and a PWM pulse.
  • a generator 86 is provided.
  • the threshold storage unit 80 stores the preset thresholds TH1 and TH2.
  • the light source luminance setting unit 81 sets the luminance of the light source 5 and the light source 6 for the PWM control unit 85.
  • the luminance setting value is determined based on the feature amount of the video, the external light intensity, the setting value by the user, and the like. That is, the light source luminance setting unit 81 detects, for example, the average value of the luminance of the input video signal as the feature amount of the video, and sets the luminance of the light sources 5 and 6 higher as the detected average value increases. Alternatively, the light source luminance setting unit 81 may detect the brightness of the surroundings and set the luminance of the light sources 5 and 6 higher as the surroundings become brighter.
  • the light source luminance setting unit 81 may set the luminance of the light sources 5 and 6 in consideration of both the luminance of the input video signal and the ambient brightness.
  • the light source luminance setting unit 81 may include an input unit for the user to set the luminance, for example, and may set the luminance of the light sources 5 and 6 according to the setting value by the user. In the first embodiment, for example, the light source luminance setting unit 81 sets the luminance as the lighting period and extinguishing period of the light sources 5 and 6.
  • the moving image area extraction unit 82 detects a moving image of the current frame, and extracts a moving image area including the detected moving image. For example, the moving image region extraction unit 82 compares the video signal of the current frame with the video signal of the previous frame in units of pixels, and determines whether or not the value obtained by accumulating the difference for one horizontal scanning period exceeds a predetermined value. You may detect the presence or absence of the moving image on a scanning line.
  • the existence area determination unit 83 includes the moving image area extracted by the moving image area extraction unit 82 based on the threshold values TH1 and TH2 stored in the threshold storage unit 80, the first illumination display area 41, and the second illumination display area described above. 42, the relationship with the overlapping illumination display area 43 is determined. That is, the existence area determination unit 83 determines whether or not the moving image area exists in the overlapping illumination display area 43, whether or not the moving image area exists across the first illumination display area 41 and the overlapping illumination display area 43, and the like. Determine the relationship. Then, the presence region determination unit 83 outputs the determination result as a presence region determination signal to the moving picture priority determination unit 84 and the PWM control unit 85.
  • the video priority determination section 84 Based on the presence area determination signal from the presence area determination section 83, the video priority determination section 84 obtains the priority of each video area and inserts the video area with the highest priority in black when there are a plurality of video areas. It is determined that When there is one moving image area, the moving image priority determination unit 84 determines that the moving image area is a target for black insertion. The moving image priority determination unit 84 outputs information on the black insertion target moving image region to the PWM control unit 85.
  • the moving image priority determination unit 84 detects the characteristics of the moving image area, and determines the priority of the moving image based on the detected characteristics.
  • the characteristics of the moving image area for determining the priority include those having a large contribution to moving image blur such as the brightness of the object, the moving speed of the object, the amount of high frequency components in the moving image area, and the presence of telop and character scroll. It is done.
  • the priority level based on the characteristics of the moving image area is higher as the luminance is higher when the characteristic of the moving image area is the luminance of the moving image.
  • the moving image priority determination unit 84 detects the luminance of the first moving image and the luminance of the second moving image, and the luminance of the first moving image is second. When the luminance is higher than the luminance of the moving image, the priority of the first moving image is determined to be higher than the priority of the second moving image.
  • the moving image priority determination unit 84 detects the moving speed of the first moving image and the moving speed of the second moving image, and when the moving speed of the first moving image is equal to or higher than the moving speed of the second moving image, It is determined that the priority is equal to or higher than the priority of the second moving image.
  • the moving image priority determination unit 84 detects the high frequency component amount of the moving image region including the first moving image and the high frequency component amount of the moving image region including the second moving image, and the high frequency of the moving image region including the first moving image.
  • the priority of the first moving image is determined to be equal to or higher than the priority of the second moving image.
  • the moving image priority determination unit 84 detects telop, character scroll, and the like in the moving image region including the first moving image, detects telop, character scroll, and the like in the moving image region including the second moving image, and the first moving image
  • the priority of the first moving image is higher than the priority of the second moving image. judge.
  • the PWM control unit 85 sets the black insertion phase signals Sb5 and Sb6 that specify the period during which black insertion is performed for the light source 5 and the light source 6 to the same value. And output to the PWM pulse generator 86. Note that the length of the period during which black is inserted is determined based on the luminance setting value from the light source luminance setting unit 81.
  • PWM pulse generator 86 outputs PWM pulse P5 and PWM pulse P6 based on black insertion phase signals Sb5 and Sb6 to turn on and off light source 5 and light source 6.
  • the liquid crystal display panel 4 corresponds to an example of a display panel
  • the light source 5 corresponds to an example of a first light source
  • the light source 6 corresponds to an example of a second light source.
  • FIG. 3 is a drive waveform diagram of the light source of the apparatus 1.
  • FIG. 3 shows the relationship between the video display synchronization signal for the display area 40 and the drive waveforms of the light sources 5 and 6 for the backlight.
  • the present apparatus 1 extracts a moving image area G1 including the object M1. Since the extracted moving image area G1 is included in the overlapping illumination display area 43, the light sources 5 and 6 are turned off during the scanning period of the moving image area G1, and the black insertion period T is provided. That is, the moving image region extraction unit 82 detects the object M1 and extracts the moving image region G1 including the object M1. The existence region determination unit 83 determines whether or not the extracted moving image region G1 is included in the overlapping illumination display region 43.
  • the PWM control unit 85 turns off both the light sources 5 and 6 and inserts black during the image data writing period for the moving image area G1 by the display control unit 9.
  • a period T is provided.
  • the moving image region G1 refers to a region from the upper end to the lower end in FIG. 3 of the object M1, for example.
  • FIG. 4a shows a case where one moving image area including the object M1 moving in the direction of the arrow (rightward) in the display area 40 is included in the overlapping illumination display area 43.
  • the drive control of the light sources 5 and 6 in this case is as already described in FIG.
  • FIG. 4b shows a case where one moving image area including the object M1 is included in the first illumination display area 41 mainly illuminated by the light source 5.
  • the light source 5 is turned off during the scanning period of the object M1, and black insertion is performed.
  • the light source 6 is turned off at a predetermined timing regardless of the scanning period of the object M1. That is, the PWM control unit 85 turns off the light source 5 and provides a black insertion period during the writing period of the image data for the object M1 by the display control unit 9.
  • the PWM control unit 85 turns off the light source 6 at a predetermined timing regardless of the writing period of the image data for the object M1 by the display control unit 9.
  • FIG. 4c shows a case where one moving image area including the object M1 is included in the second illumination display area 42 mainly illuminated by the light source 6.
  • the light source 6 is turned off during the scanning period of the object M1, and black insertion is performed.
  • the light source 5 is turned off at a predetermined timing regardless of the scanning period of the object M1. That is, the PWM control unit 85 turns off the light source 6 and provides a black insertion period during the writing period of the image data for the object M1 by the display control unit 9. Further, the PWM control unit 85 turns off the light source 5 at a predetermined timing regardless of the writing period of the image data for the object M1 by the display control unit 9.
  • the moving image M1 included in the second illumination display area 42 it is possible to suppress the occurrence of crosstalk due to the illumination of the light source 6, and to realize good display quality without moving image blur and the like.
  • FIG. 5 shows a case where one moving image region G2 including the object M2 moving in the direction of the arrow (rightward) in the display region 40 straddles the first illumination display region 41 and the overlapping illumination display region 43.
  • a region where the moving image region G2 and the overlapping illumination display region 43 overlap is defined as a region L3
  • a region where the moving image region G2 and the first illumination display region 41 overlap is defined as a region L1
  • the sizes of the region L3 and the region L1 are compared.
  • the PWM controller 85 determines the size of the area L3 and the area L1.
  • the PWM control unit 85 simultaneously turns off the light sources 5 and 6 to provide a black insertion period during the image data writing period for the region L3 by the display control unit 9.
  • the drive control of the light sources 5 and 6 is the same when the moving image area G2 extends over the second illumination display area 42 and the overlapping illumination display area 43.
  • FIG. 6 shows a case where one moving image region G3 including the object M2 moving in the direction of the arrow (rightward) in the display region 40 straddles the first illumination display region 41 and the overlapping illumination display region 43.
  • a region where the moving image region G3 and the overlapping illumination display region 43 overlap is a region L3
  • a region where the moving image region G3 and the region 41 overlap is a region L1
  • the sizes of the region L3 and the region L1 are compared.
  • the light source 5 is turned off and black insertion is performed during the scanning period of the region L1.
  • the light source 6 is turned off at a predetermined timing regardless of the scanning period of the object M2. That is, when the presence area determination unit 83 determines that the moving image area G2 exists across the first illumination display area 41 and the overlapping illumination display area 43, the PWM controller 85 determines the size of the area L3 and the area L1.
  • the PWM control unit 85 turns off the light source 5 and provides a black insertion period during the image data writing period for the region L1 by the display control unit 9. Further, the PWM control unit 85 turns off the light source 6 at a predetermined timing regardless of the writing period of the image data for the object M2 by the display control unit 9.
  • the drive control of the light sources 5 and 6 is the same when the moving image area G3 extends over the second illumination display area 42 and the overlapping illumination display area 43.
  • the region L1 corresponds to an example of a first overlapping region
  • the region L3 corresponds to an example of a second overlapping region.
  • the sizes of the region L3 and the region L1 are compared.
  • the region L3 is larger than the region L1, the light source 5,
  • 6 is turned off simultaneously and black insertion is performed has been described.
  • the light sources 5 and 6 can be turned off simultaneously during the period of the region L1.
  • the width of the black insertion period corresponding to the set luminance from the light source luminance setting unit 81 is compared with the height in the vertical direction of the moving image region G2, and the black insertion period corresponding to the set luminance from the light source luminance setting unit 81 is compared.
  • the light sources 5 and 6 may be turned off simultaneously during the period of the area L1 in addition to the area L3. That is, the PWM control unit 85 determines the width of the black insertion period corresponding to the luminance set by the light source luminance setting unit 81 and the vertical height of the moving image area G2 (that is, the vertical length in FIG. 5). Compare When the width of the black insertion period is larger than the vertical height of the moving image area G2, the PWM control section 85 turns off the light sources 5 and 6 simultaneously during the image data writing period to the areas L3 and L1 by the display control section 9. You may make it do. The same applies to FIG.
  • the sizes of the region L3 and the region L1 are compared.
  • the region L3 is larger than the region L1 (L3> L1)
  • image data is written to the region L3.
  • the light sources 5 and 6 are turned off at the same time to insert black, but this is not a limitation.
  • the size of the region L3 is 1/3 or more of the size of the region L1, the light sources 5 and 6 may be turned off simultaneously to perform black insertion. That is, when the presence area determination unit 83 determines that 1 ⁇ 4 or more of the moving image area G2 overlaps the overlapping illumination display area 43, the PWM control unit 85 performs image data for the area L3 by the display control unit 9.
  • the light sources 5 and 6 may be turned off simultaneously to provide a black insertion period. As a result, it is possible to suppress the occurrence of crosstalk in the most conspicuous overlapping illumination display region 43 and realize a good display quality without moving image blur.
  • the light sources 5 and 6 may be turned off simultaneously to perform black insertion. That is, when the presence region determination unit 83 determines that the region L3 that is a part of the moving image region G2 is included in the overlapping illumination display region 43, the PWM control unit 85 performs an image on the region L3 by the display control unit 9. During the data writing period, the light sources 5 and 6 may be turned off simultaneously to provide a black insertion period.
  • the light sources 5 and 6 are turned off at the same time, thereby reliably suppressing the occurrence of crosstalk in the most prominent overlapping illumination display area 43.
  • each of the two moving image areas is included in any one of the first illumination display area 41, the second illumination display area 42, and the overlapping illumination display area 43 will be described with reference to FIGS. 7a to 7c. .
  • FIGS. 7a to 7c show a case where there is a moving image area including the object M1 moving in the right direction and a moving image area including the object M3 moving in the left direction.
  • the moving picture priority determination unit 84 detects the characteristics of the moving picture area including the object M1 and the characteristics of the moving picture area including the object M3, and the priorities of the objects M1 and M3 based on the detected characteristics. Determine.
  • FIG. 7a shows a case where the priority of the object M3 in the first illumination display area 41 is higher than the priority of the object M1 in the overlapping illumination display area 43.
  • the light source 5 is turned off during the scanning period of the moving image region of the object M3, and the light source 6 is turned off during the scanning period of the moving image region of the object M1. That is, in FIG. 7a, the moving image priority determination unit 84 determines that the priority of the object M3 is higher than the priority of the object M1.
  • the PWM control unit 85 turns off the light source 5 and provides a black insertion period during the image data writing period for the moving image area including the object M3 by the display control unit 9. Further, the PWM control unit 85 turns off the light source 6 and provides a black insertion period during the writing period of the image data for the moving image area including the object M1 by the display control unit 9.
  • FIG. 7b shows a case where the priority of the object M1 in the overlapping illumination display area 43 is higher than or equal to the priority of the object M3 in the second illumination display area.
  • the light sources 5 and 6 are turned off simultaneously during the scanning period of the moving image area of the object M1. That is, in FIG. 7b, the moving image priority determination unit 84 determines that the priority of the object M1 is higher than or equal to the priority of the object M3.
  • the PWM control unit 85 turns off both the light sources 5 and 6 and provides a black insertion period during the writing period of the image data for the moving image area including the object M1 by the display control unit 9.
  • the object M1 corresponds to an example of the first moving image
  • the moving image region including the object M1 corresponds to an example of the first moving image region
  • the object M3 corresponds to an example of the second moving image
  • the object M3 is The moving image area included corresponds to an example of the second moving image area.
  • FIG. 7c shows a case where the priority of the object M1 in the overlapping illumination display area 43 is higher than or equal to that of the object M3.
  • the light sources 5 and 6 are turned off simultaneously during the scanning period of the moving image area including the object M1. That is, in FIG. 7c, the moving image priority determination unit 84 determines that the priority of the object M1 is higher than or equal to the priority of the object M3.
  • the PWM control unit 85 turns off both the light sources 5 and 6 and provides a black insertion period during the writing period of the image data for the moving image area including the object M1 by the display control unit 9. Similarly, in FIG.
  • the light sources 5 and 6 are turned off simultaneously during the scanning period of the moving image area including the object M3.
  • the light sources 5 and 6 may be turned off at the same time during the scanning period including both the object M1 and the object M3 to reduce the motion blur of both the objects M1 and M3. I can do it.
  • the PWM control unit 85 may be turned off during the image data writing period for the objects M1 and M3.
  • the extinction period of the light sources 5 and 6 based on the luminance set by the light source luminance setting unit 81 is the sum of the addition of the image data writing period to the object M1 and the image data writing period to the object M3 by the display control unit 9. Although it is shorter but longer than the image data writing period for the object M1, if the light sources 5 and 6 can be turned off only during a part of the image data writing period for the object M3, the moving image blur of the object M3 is as much as possible. Can be reduced. Further, the extinction period of the light sources 5 and 6 based on the luminance set by the light source luminance setting unit 81 is the sum of adding the image data writing period to the object M1 and the image data writing period to the object M3 by the display control unit 9.
  • the PWM controller 85 may provide a light extinguishing period of the light sources 5 and 6 approximately at the center of the image data writing period for the objects M1 and M3.
  • the extinction period of the light sources 5 and 6 based on the luminance set by the light source luminance setting unit 81 is the sum of adding the image data writing period to the object M1 and the image data writing period to the object M3 by the display control unit 9. If it is shorter but longer than the image data writing period for the object M1 by the display controller 9, the PWM controller 85 once turns on the light sources 5 and 6 after the image data writing period for the object M1 ends.
  • the light sources 5 and 6 may be turned off again after the start of the image data writing period for M3.
  • the moving image blur of the object M3 can be reduced as much as possible while maintaining the luminance set by the light source luminance setting unit 81.
  • the moving image region including the high priority object is any region of the first illumination display region 41, the second illumination display region 42, and the overlapping illumination display region 43. Based on whether it is included in Accordingly, the drive control for the light sources 5 and 6 is the same as that described with reference to FIGS. 7a to 7c.
  • the moving image area including the object M6 moving in the right direction is included in the overlapping illumination display area 43, and the moving image area including the object M7 (telop) moving in the right direction is included in the second illumination display area 42.
  • the light source 5 is turned off during the scanning period of the object M6 included in the overlapping illumination display area 43, During the scanning period of the object M7 (telop) included in the second illumination display area 42, the light source 6 is turned off.
  • the moving image priority determination unit 84 detects the presence of a telop or character scroll as the characteristics of the moving image region including the moving image, and determines that the priority of the object M7 (telop) is higher than the priority of the object M6.
  • the PWM control unit 85 turns off the light source 5 and provides a black insertion period during the writing period of the image data for the moving image area including the object M6 by the display control unit 9. Further, the PWM control unit 85 turns off the light source 6 and provides a black insertion period during the writing period of the image data for the moving image area including the object M7 by the display control unit 9.
  • the moving image area including the high priority object M7 (telop) is included in the first illumination display area 41, and the moving image area including the low priority object M6 is included in the overlapping illumination display area 43.
  • the PWM control unit 85 turns off the light source 5 during the writing period of the image data for the moving image area including the object M7 (telop) with high priority, and the image data for the moving image area including the object M6 with low priority. During the writing period, the light source 6 may be turned off.
  • FIG. 9 is a flowchart showing the light source control when there is one moving image area in the apparatus 1 of the first embodiment.
  • step S1 the display control unit 9 displays an image on the liquid crystal display panel 4 based on the video signal, and proceeds to step S2.
  • step S2 the moving image region extracting unit 82 detects a moving image, extracts a moving image region including the detected moving image, outputs the extracted moving image region information to the existing region determining unit 83, and proceeds to step S3.
  • step S3 the presence area determination unit 83 determines the relationship between the extracted moving image area and the first illumination display area 41, the second illumination display area 42, and the overlapping illumination display area 43, and outputs the existence area determination signal to the PWM. Output to the controller 85. If the moving image area is included in the overlapping illumination display area 43, the process proceeds to step S4. If not included, the process proceeds to step S5.
  • step S4 the PWM control unit 85 generates the black insertion phase signals Sb5 and Sb6 having the same value and outputs the black insertion phase signals Sb5 and Sb6 to the PWM pulse generation unit 86, so that the moving image region included in the overlapping illumination display region 43 is scanned during the scanning period.
  • the light source 5 and the light source 6 are turned off simultaneously. Thereafter, the process proceeds to step S2 to perform processing for the next frame.
  • step S5 the PWM control unit 85 individually generates the black insertion phase signals Sb5 and Sb6 based on the existence region determination signal and outputs the black insertion phase signals Sb5 and Sb6 to the PWM pulse generation unit 86, whereby the light source 5 and the light source 6 are individually provided. Control. Thereafter, the process proceeds to step S2 to perform processing for the next frame.
  • FIG. 10 is a block diagram illustrating a configuration of the apparatus 1 according to the second embodiment.
  • FIG. 11 is a diagram illustrating a driving waveform of the light source when the object M8 moving in the right direction while being enlarged is displayed.
  • the same reference numerals are given to configurations having the same functions as those in the first embodiment shown in FIG. 1.
  • the light source control unit 8 of the second embodiment includes a moving image area size calculation unit 87 and a black insertion period limiter unit 88 in addition to the configuration of the first embodiment.
  • the moving region size calculation unit 87 receives a presence region determination signal indicating that the moving region extracted by the moving region extraction unit 82 is included in the overlapping illumination display region 43 by the presence region determination unit 83 Then, the size of the extracted moving image area is calculated, and the black insertion period corresponding to the calculation result is output to the black insertion period limiter unit 88.
  • the black insertion period limiter 88 overlaps the same value when the black insertion period output by the moving image area size calculation unit 87 is smaller than the period corresponding to the overlapping illumination display area 43, and overlaps the black insertion period when it is larger.
  • a value limited to a period corresponding to the illumination display area 43 is output to the PWM control unit 85.
  • the PWM control unit 85 outputs the black insertion phase signals Sb5 and Sb6 based on both the information on the black insertion target moving image area output from the moving image priority determination unit 84 and the black insertion period output from the black insertion period limiter unit 88. Generated and output to the PWM pulse generator 86.
  • the PWM pulse generator 86 controls the light source 5 and the light source 6 to be turned on and off based on the black insertion phase signals Sb5 and Sb6 output from the PWM controller 85.
  • the PWM pulse generator 86 sets the peak value of the drive waveform for the light sources 5 and 6 to a predetermined peak value.
  • PWM pulses P5 and P6 changed to peak values HA and HB higher than H are output.
  • the size of the object M8 increases while moving in the overlapping illumination display area 43. For this reason, moving image blur cannot be suppressed only by performing black insertion for a predetermined black insertion period T. Therefore, in the second embodiment, the black insertion period T0 (> T) is extended in accordance with the size of the object M8.
  • the PWM control unit 85 and the PWM pulse generation unit 86 change the crest values (current values) of the drive waveforms for the light sources 5 and 6 to crest values HA and HB higher than the predetermined crest value H. This suppresses a decrease in luminance of the light sources 5 and 6. It should be noted that since there is a physical limit to the luminance improvement by increasing the peak value, the period corresponding to the overlapping illumination display area 43 may be maximized as the black insertion period T0.
  • the black insertion period T is extended to the black insertion period T0, and the peak values H of the drive waveforms of the light sources 5 and 6 are increased to the peak values HA and HB. Even when the object M8 becomes large in the middle, it is possible to prevent occurrence of crosstalk due to overlapping illumination from the plurality of light sources 5 and 6, and to realize a high-quality image display without moving image blur and luminance reduction.
  • the black insertion period of the light sources 5 and 6 and the control of the drive waveform for the object M8 that moves in the right direction while increasing in size have been described.
  • the black insertion period and the drive waveform control of the light sources 5 and 6 in the second embodiment are not limited to an object that moves while increasing in size.
  • the present invention can also be applied to the objects M1 to M3, M6, and M7 in FIGS. 3, 4a to 4c, FIGS. 5, 6, 7a to 7c, and FIG.
  • the PWM control unit 85 and the PWM pulse generator 86 may change the peak value (current value) of the drive waveform for the light sources 5 and 6 to a peak value higher than a predetermined peak value.
  • the LED edge type backlight system in which the LEDs are arranged at the upper and lower end portions of the liquid crystal display panel 4 of the display unit 2 has been described. Not limited to.
  • an LED direct-type backlight system in which LEDs 511, 512,..., 51n,..., 5m1,. It may be.
  • a backlight type directly under the lamp in which lamps 611, 612,..., 61n such as fluorescent tubes are arranged at a predetermined interval may be used.
  • N light sources (N is an integer of 2 or more) may be provided as light sources.
  • the display area is an overlapping illumination display area that is illuminated by a k-th light source (k is an integer from 1 to (N ⁇ 1)) and a (k + 1) light source with a light amount of a predetermined level or more. What is necessary is just to divide
  • the light source control unit 8 controls turning on and off of the first light source to the Nth light source. Further, when the moving image area is included in the overlapping illumination display area, the light source control unit 8 performs the k-th light source and the k-th light source during the scanning period of the moving image area (that is, during the image data writing period for the moving image area by the display control unit 9). The effect of the present invention can be achieved by simultaneously turning off the (k + 1) th light source.
  • the present invention is not limited to this.
  • the light sources 5 and 6 may be controlled in the same manner as in the first and second embodiments even when the moving image moves in the vertical direction or when the moving image moves in the oblique direction.
  • the light sources 5 and 6 in the one-frame period do not move over a plurality of consecutive frames. Therefore, it is possible to preferably exert the effect of the lighting and extinguishing control of the light sources 5 and 6 according to the first and second embodiments.
  • the PWM control unit 85 can easily perform turning on / off control of the light sources 5 and 6.
  • the light source control unit 8 performs normal blinking. ing.
  • FIG. 4 b and FIG. 4 c are combined, that is, when one moving image area is included in the first illumination display area 41 and the other moving image area is included in the second illumination display area 42.
  • the control unit 8 may perform double blinking shown in FIG. 14a.
  • the light source control unit 8 controls the light sources 5 and 6 as described in the first and second embodiments.
  • blinking refers to an operation of changing the light extinction period of the light source in accordance with the moving image area.
  • the light source control unit 8 may control the light sources 5 and 6 by backlight scanning without performing blinking.
  • backlight scanning refers to an operation in which the light source start-off position is fixed regardless of the position of the moving image area. That is, in the backlight scan, when the luminance set by the light source luminance setting unit 81 does not change, the lighting period and the extinguishing period of the light source in one frame period are fixed. In the backlight scan, the light source control unit 8 turns off the light source 5 and writes an image on the lower part of the display region 40 by the display control unit 9 during the writing period of the image data on the upper part of the display region 40 by the display control unit 9.
  • the light source 6 may be turned off during the data writing period.
  • the light source control unit 8 may control the light sources 5 and 6 as described in the first and second embodiments. According to this embodiment, since the backlight scan is performed when the moving image area does not overlap the overlapping illumination display area 43, the light source control unit 8 can simplify the control of the light sources 5 and 6.
  • An image display device includes a display panel having a display area that displays an image corresponding to an input video signal, and a display control unit that writes image data based on the video signal to the display area.
  • a first light source and a second light source that illuminate the display area of the display panel, and a light source controller that controls turning on and off of the first light source and the second light source, and the display area includes:
  • the first light source and the second light source each have an overlapping illumination display area that is illuminated with an amount of light of a predetermined level or more, and the light source control unit is located in the display area of the display panel based on the video signal.
  • the existence area in the display area of the extracted moving image area is determined, and the moving image area is determined to be included in the overlapping illumination display area
  • The, during the write period of the image data for the moving picture area by said display control unit turns off the first light source and the second light source.
  • the display panel has a display area for displaying an image corresponding to the input video signal.
  • the display control unit writes image data based on the video signal to the display area.
  • the first light source and the second light source illuminate the display area of the display panel.
  • the light source control unit controls turning on and off of the first light source and the second light source.
  • the display area has an overlapping illumination display area that is illuminated by the first light source and the second light source with a light amount of a predetermined level or more.
  • the light source control unit extracts a moving image area including a moving image in the display area of the display panel based on the video signal.
  • the light source control unit determines an existing area in the display area of the extracted moving image area.
  • the light source control unit turns off the first light source and the second light source during the writing period of the image data for the moving image area by the display control unit.
  • the first light source and the second light source are turned on, the moving image area included in the overlapping illumination display area is illuminated by the first light source and the second light source with a light amount of a predetermined level or more. Therefore, during the writing period of the image data for the moving image area included in the overlapping illumination display area, the first light source and the second light source are turned off, thereby generating crosstalk due to the overlapping illumination of the first light source and the second light source. It is possible to realize high-quality image display that reduces and suppresses blurring of moving images.
  • the display area further includes a first illumination display area adjacent to the overlapped illumination display area on the first light source side, and the light source control unit is configured such that the moving image area is the first illumination area.
  • region where the said moving image area and the said 1st illumination display area overlap is made into a 1st overlap area
  • the said animation area and the said overlap illumination display area Is the second overlapping area, the size of the first overlapping area is compared with the size of the second overlapping area, and the lighting of the first light source and the second light source is performed based on the comparison result. It is preferable to control the turn-off and turn-off.
  • the display area further includes the first illumination display area adjacent to the overlapping illumination display area on the first light source side. Since the first illumination display area is adjacent to the overlapping illumination display area on the first light source side, the first illumination display area is illuminated by the first light source with a larger light quantity than the illumination by the second light source.
  • the light source control unit determines that the moving image area exists across the first illumination display area and the overlapping illumination display area, the light source control unit sets the area where the moving image area and the first illumination display area overlap as a first overlapping area, When the area where the overlapping illumination display area overlaps is set as the second overlapping area, the size of the first overlapping area is compared with the size of the second overlapping area.
  • the light source control unit controls turning on and off of the first light source and the second light source based on the comparison result. Therefore, when the moving image area overlaps both the first illumination display area and the overlapping illumination display area, the first light source and the second light source are compared based on the comparison result between the size of the first overlap area and the size of the second overlap area. It is possible to appropriately control turning on and off.
  • the light source control unit may be configured to apply the display control unit to the second overlapping area when the size of the second overlapping area is equal to or larger than the first overlapping area.
  • the first light source and the second light source are turned off, and when the size of the second overlapping region is smaller than the size of the first overlapping region, the display control unit executes the first light source. It is preferable that the first light source is turned off during the writing period of the image data for one overlapping region.
  • the light source control unit when the size of the second overlapping region is equal to or larger than the size of the first overlapping region, the light source control unit is configured to output the first light source during the writing period of the image data to the moving image region by the display control unit.
  • the second light source is turned off.
  • the light source control unit turns off the first light source during the writing period of the image data to the first overlapping area by the display control unit. Therefore, when the moving image area overlaps both the first illumination display area and the overlapping illumination display area, the crossing due to the illumination of the first light source and the second light source depends on the magnitude relationship between the first overlap area and the second overlap area. It is possible to realize a high-quality image display that appropriately reduces the occurrence of talk and suppresses moving image blur.
  • the display area further includes a first illumination display area adjacent to the overlapped illumination display area on the first light source side
  • the light source control unit includes the first moving image and the second animation display area.
  • a moving image region extracting unit that detects a moving image and extracts a first moving image region including the first moving image and a second moving image region including the second moving image as the moving image region, and the moving image region extracting unit extracts the moving image region A characteristic of each of the first moving image area and the second moving image area is detected, and based on the detection result, a first priority that is a priority of the first moving image and a second priority that is a priority of the second moving image;
  • the light source controller includes the first moving image area included in the overlapping illumination display area and the second moving image area included in the first illumination display area.
  • the first control unit is configured to write the first data during the writing period of the image data to the first moving image area by the display control unit.
  • the display control unit performs the first writing of the image data on the first moving image area. It is preferable that the two light sources are turned off and the first light source is turned off during the writing period of the image data for the second moving image area by the display control unit.
  • the display area further includes the first illumination display area adjacent to the overlapping illumination display area on the first light source side. Since the first illumination display area is adjacent to the overlapping illumination display area on the first light source side, the first illumination display area is illuminated by the first light source with a larger light quantity than the illumination by the second light source.
  • the light source control unit includes a moving image region extraction unit and a moving image priority determination unit. The moving image region extraction unit detects the first moving image and the second moving image, and extracts the first moving image region including the first moving image and the second moving image region including the second moving image as moving image regions.
  • the moving image priority determination unit detects the characteristics of the first moving image region and the second moving image region extracted by the moving image region extraction unit, and based on the detection result, the first priority and the first priority that are the priorities of the first moving image.
  • the second priority that is the priority of the two moving images is determined.
  • the first light source and the second light source are turned off, thereby the first included in the overlapping illumination display area.
  • Generation of crosstalk due to overlapping illumination of the first light source and the second light source in the moving image area can be reduced, and moving image blur can be suppressed.
  • the light source control unit turns off the second light source during the writing period of the image data to the first moving image area by the display control unit, and the display control unit During the writing period of the image data for the second moving image area, the first light source is turned off.
  • the second light source is turned off during the writing period for the first moving image region, and the second moving image region is By turning off the first light source during the writing period, it is possible to reduce the occurrence of crosstalk in the first moving image area and the second moving image area, and to suppress moving image blur. Accordingly, when the priorities of two moving images determined based on the characteristics of the moving image region are different, the occurrence of crosstalk due to illumination of the first light source and the second light source is appropriately reduced according to the priority level relationship. In addition, it is possible to realize high-quality image display in which moving image blur is suppressed.
  • the moving image priority determination unit detects the luminance of the first moving image and the luminance of the second moving image when the characteristic is the luminance of the moving image, and the first moving image
  • the first priority is determined to be equal to or higher than the second priority, and when the luminance of the first moving image is lower than the luminance of the second moving image. It is preferable to determine that the first priority is lower than the second priority.
  • the moving image priority determination unit detects the luminance of the first moving image and the luminance of the second moving image, and the luminance of the first moving image is the luminance of the second moving image.
  • the first priority is determined to be equal to or higher than the second priority, and when the luminance of the first moving image is lower than the luminance of the second moving image, the first priority is determined to be lower than the second priority. Therefore, by detecting the luminance of the first moving image and the second moving image and determining the priority based on the luminance, the occurrence of crosstalk due to illumination of the first light source and the second light source is appropriately reduced, and moving image blur is suppressed. High-quality image display can be realized.
  • the moving image priority determination unit detects the moving speed of the first moving image and the moving speed of the second moving image when the characteristic is a moving speed of the moving image.
  • the moving speed of the first moving image is equal to or higher than the moving speed of the second moving image
  • the moving speed of the first moving image is equal to that of the second moving image. It is preferable to determine that the first priority is lower than the second priority when it is slower than the moving speed.
  • the moving image priority determination unit detects the moving speed of the first moving image and the moving speed of the second moving image, and the moving speed of the first moving image is the first moving speed.
  • the moving speed of the second moving image is equal to or higher than the moving speed of the second moving image
  • the first priority is determined to be higher than the second priority.
  • the moving speed of the first moving image is slower than the moving speed of the second moving image
  • the first priority is higher than the second priority.
  • the moving image priority determination unit may be configured such that, when the characteristic is a high frequency component amount in the moving image region, a high frequency component amount in the first moving image region and a high frequency component amount in the second moving image region. And when the high-frequency component amount in the first moving image region is equal to or greater than the high-frequency component amount in the second moving image region, the first priority is determined to be greater than or equal to the second priority. When the high-frequency component amount in the region is smaller than the high-frequency component amount in the second moving image region, it is preferable to determine that the first priority is lower than the second priority.
  • the moving image priority determination unit detects the high-frequency component amount in the first moving image region and the high-frequency component amount in the second moving image region.
  • the first priority is determined to be equal to or higher than the second priority
  • the high frequency component amount in the first moving image region is the high frequency component amount in the second moving image region.
  • it is less it is determined that the first priority is lower than the second priority.
  • the image data writing period is set to the first light source.
  • the first light source is turned on by increasing the luminance during a period other than the writing period of the image data, and the light source control unit is controlled by the display control unit.
  • the second light source is turned off during the image data writing period, if the image data writing period exceeds a preset turn-off period for the second light source, other than the image data writing period During this period, it is preferable to turn on the second light source by increasing the luminance.
  • the image data writing period is set to the extinction period set in advance for the first light source.
  • the brightness is increased and the first light source is turned on during the period other than the image data writing period.
  • the light source control unit turns off the second light source during the image data writing period by the display control unit, if the image data writing period exceeds a preset extinction period for the second light source, an image is displayed. During a period other than the data writing period, the luminance is increased and the second light source is turned on.
  • the first light source (or the second light source) is extinguished during the image data writing period, and the luminance is increased during the period other than the image data writing period. If the first light source (or the second light source) is turned on without increasing, the light is turned off only for a longer period than the preset extinguishing period, so that the amount of illumination by the first light source (or the second light source) decreases.
  • An image display device includes a display panel having a display area for displaying an image corresponding to an input video signal, and display control for writing image data based on the video signal to the display area.
  • N N is an integer of 2 or more
  • first light source to N light source for illuminating the display area of the display panel
  • light source control for controlling turning on and off of the first light source to N light source
  • the display area is overlapped and illuminated by the kth light source (k is an integer from 1 to (N ⁇ 1)) and the (k + 1) light source, each being overlapped with a light amount of a predetermined level or more.
  • the light source control unit extracts a moving image region including a moving image in the display region of the display panel based on the video signal, and determines an existing region in the display region of the extracted moving image region. ,
  • the video area When said duplication is determined to be included in the illumination display region, during the write period of the image data for the moving picture area by said display control unit turns off the first k light source and the (k + 1) th light source.
  • the display panel has a display area for displaying an image corresponding to the input video signal.
  • the display control unit writes image data based on the video signal to the display area.
  • the first to Nth light sources illuminate the display area of the display panel.
  • the light source control unit controls turning on and off of the first light source to the Nth light source.
  • the display area has an overlapping illumination display area that is illuminated by the kth light source and the (k + 1) th light source with a light amount of a predetermined level or more.
  • the light source control unit extracts a moving image area including a moving image in the display area of the display panel based on the video signal, determines an existing area in the display area of the extracted moving image area, and the moving image area is included in the overlapping illumination display area Is determined, the kth light source and the (k + 1) th light source are turned off during the writing period of the image data for the moving image area by the display control unit.
  • the kth light source and the (k + 1) light source are turned on, the moving image area included in the overlapping illumination display area is illuminated by the kth light source and the (k + 1) light source with a light amount equal to or higher than a predetermined level.
  • the crosstalk due to the overlapping illumination of the kth light source and the (k + 1) light source is performed by turning off the kth light source and the (k + 1) light source during the writing period of the image data for the moving image area included in the overlapping illumination display area. It is possible to realize high-quality image display that reduces the occurrence of blur and suppresses blurring of moving images.
  • An image display method is a display control for writing image data based on an input video signal to a display area of a display panel and displaying an image corresponding to the video signal in the display area.
  • a light source control step for controlling turning on and off of the first light source and the second light source that illuminate the display area of the display panel, and the display area of the display panel extracted based on the video signal
  • the light source control step includes the first light source and the second light source. Source to turn off the.
  • the display control step writes the image data based on the input video signal to the display area of the display panel and displays an image corresponding to the video signal in the display area.
  • the light source control step controls the turning on and off of the first light source and the second light source that illuminate the display area of the display panel.
  • Overlapping illumination display in which a moving image area including a moving image in a display area of a display panel extracted based on a video signal is illuminated by a first light source and a second light source in the display area with a light amount of a predetermined level or more. If included in the region, the first light source and the second light source are turned off in the light source control step during the writing period of the image data for the moving image region in the display control step.
  • the moving image area included in the overlapping illumination display area is illuminated by the first light source and the second light source with a light amount of a predetermined level or more. Accordingly, the first light source and the second light source are turned off during the writing period of the image data for the moving image area included in the overlapping illumination display area, thereby causing crosstalk due to overlapping illumination from the first light source and the second light source. It is possible to realize high-quality image display that reduces and suppresses blurring of moving images.
  • the image display device and the image display method of the present invention when the moving image area is included in the overlapping illumination display area that is illuminated by the first and second light sources, the first light source and the second light source are converted into moving images. During the period of writing image data to the area, it is turned off. Therefore, it is possible to reduce the occurrence of crosstalk due to overlapping illumination from the first light source and the second light source, and to realize a high-quality image display in which moving image blur is suppressed.
  • the image display device and the image display method of the present invention can be applied to an image display device including a plurality of light sources that illuminate a display area of a display panel.

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Abstract

An image display device is provided with a display panel (4) having a display region (40) for displaying an image corresponding to an input video signal, a display controller (9) for writing image data based on the video signal to the display region, a first light source (5) and a second light source (6) for illuminating the display region of the display panel, and a light source controller (8) for controlling the turning on and off of the first and second light sources. The display region has a superimposed illumination display region (43) in which the first and second light sources are superimposed and illuminate with light flux at or above respective specified levels. When the light source controller extracts a moving image region containing a moving image within the display region of the display panel in accordance with the video signal, determines the region of the extracted moving image region which is present in the display region, and determines that the moving image region is included in the superimposed illumination display region, the light source controller turns off the first and second light sources during the period of writing of the video data for the moving image region by the display controller.

Description

画像表示装置および画像表示方法Image display device and image display method
　本発明は、表示パネルに対するバックライト用の光源を備えた画像表示装置および画像表示方法に関するものである。特に、動画表示に係わる光源の制御技術に関わるものである。 The present invention relates to an image display apparatus and an image display method provided with a light source for backlighting a display panel. In particular, the present invention relates to a light source control technique related to moving image display.
　液晶表示装置などの画像表示装置では、良好な画像品質を実現するために、冷陰極管ランプ（ＣＣＦＬ）または発光ダイオード（ＬＥＤ）などの光源によって表示パネルを照明するバックライト方式のものが知られている。光源の配置方法としては、表示パネルの背後に配置する直下型や表示パネルの背後に設けた導光板と略同一平面上に光源を配置するエッジ型などがある。 As an image display device such as a liquid crystal display device, a backlight type is known in which a display panel is illuminated by a light source such as a cold cathode tube lamp (CCFL) or a light emitting diode (LED) in order to achieve good image quality. ing. As a light source arrangement method, there are a direct type arranged behind the display panel, an edge type arranged with a light source substantially on the same plane as the light guide plate provided behind the display panel, and the like.
　バックライト方式では表示画面の輝度を高めることができるが、一方で輝度ムラや動画を表示する際の画質低下（動画ボヤケなど）が目立ちやすくなるといった課題を伴う。 The backlight method can increase the brightness of the display screen, but it involves problems such as uneven brightness and reduced image quality (moving image blur, etc.) when displaying moving images.
　これに対して、光源の駆動制御で動画を表示する際の画質低下を抑制する方法が考えられている。例えば、表示領域を複数のブロックに分割し、分割された各ブロックに対応して複数の光源を配置し、動画が表示される表示領域のブロックに対応した光源を消灯することで動画ボヤケなどを抑制する表示装置が提案されている（例えば、特許文献１～３参照）。 On the other hand, a method for suppressing a deterioration in image quality when a moving image is displayed by driving control of the light source is considered. For example, dividing the display area into a plurality of blocks, arranging a plurality of light sources corresponding to each divided block, turning off the light sources corresponding to the blocks in the display area where the moving image is displayed, etc. Display devices that suppress the display have been proposed (see, for example, Patent Documents 1 to 3).
　しかしながら、上述した従来提案されている画像表示装置では、以下のような課題があった。 However, the above-described conventionally proposed image display device has the following problems.
　図１３ａに示すように、第１の従来の画像表示装置１００は、表示画面内で物体１０１が移動する領域（以下、「動画領域」と略記する）が１つの場合、動画領域１０２の走査期間中は光源Ａ、Ｂを消灯して黒挿入期間ＴＢを設けて黒挿入を行うことで、液晶テレビなどに特有の動画ボヤケを改善することができた。しかし、図１３ｂに示すように、表示画面内に２つの動画領域１０２、１０４が存在する場合、動画領域１０２の走査期間中は光源Ａ、Ｂの消灯により黒挿入期間ＴＢを設けて黒挿入が行われて動画ボヤケを抑制できるが、動画領域１０４に対しては黒挿入が行われず動画ボヤケを抑制できない。 As shown in FIG. 13A, the first conventional image display device 100 has a scanning period of the moving image region 102 when there is one region (hereinafter abbreviated as “moving image region”) in which the object 101 moves in the display screen. In the interior, the blur of the moving image peculiar to the liquid crystal television or the like could be improved by turning off the light sources A and B and providing the black insertion period TB for black insertion. However, as shown in FIG. 13b, when there are two moving image areas 102 and 104 in the display screen, the black insertion period TB is provided by turning off the light sources A and B during the scanning period of the moving image area 102 to perform black insertion. Although it is possible to suppress moving image blur, black insertion is not performed on the moving image region 104 and moving image blur cannot be suppressed.
　これに対して、表示画面内に動画領域が複数ある場合にも動画ボヤケを抑制できる第２の従来の画像表示装置を図１４ａに示す。 On the other hand, FIG. 14A shows a second conventional image display device capable of suppressing moving image blur even when there are a plurality of moving image areas in the display screen.
　図１４ａには、画像表示装置１１０の表示画面を上下２つの表示領域に分割し、各表示領域に対応する光源Ａ、Ｂを個別に駆動制御することで動画領域１０２、１０４に対する黒挿入を行うこと（これを「ダブルブリンキング」と称する）が示されている。具体的には、動画領域１０２、１０４のそれぞれに対して光源Ａの黒挿入期間ＴＢ１および光源Ｂの黒挿入期間ＴＢ２を設定することで、複数の動画領域が存在する場合でも動画ボヤケを抑制できる。 In FIG. 14a, the display screen of the image display device 110 is divided into two upper and lower display areas, and the light sources A and B corresponding to the respective display areas are individually driven and controlled to perform black insertion into the moving image areas 102 and 104. (This is referred to as “double blinking”). Specifically, by setting the black insertion period TB1 of the light source A and the black insertion period TB2 of the light source B for each of the moving image areas 102 and 104, moving image blur can be suppressed even when there are a plurality of moving image areas. .
　しかしながら、図１４ｂに示すように、光源Ａ、Ｂの点灯による表示画面上の輝度は、照明光の照明範囲内で上下の端部から中央に向けて漸減する。したがって、光源Ａ、Ｂからの照明光が重複するＣＲ領域では、光源Ａ、Ｂのうちの一方を消灯しても他方の光源の影響を受けるため、完全な黒挿入とはならない。つまり、光源Ａ、Ｂに対して個別に駆動制御を行うと相互に影響を受けてクロストークが発生する。例えば、動画領域１０４がＣＲ領域内にあり、動画領域１０２の一部がＣＲ領域に含まれる場合、黒挿入期間ＴＢ３、ＴＢ４における黒挿入の効果は低下する。特に、動画領域１０４は、光源Ａを消灯しても光源Ｂによる影響が大きく、黒挿入の効果は低下する。 However, as shown in FIG. 14b, the luminance on the display screen due to the lighting of the light sources A and B gradually decreases from the upper and lower ends toward the center within the illumination range of the illumination light. Therefore, in the CR region where the illumination lights from the light sources A and B overlap, even if one of the light sources A and B is turned off, it is affected by the other light source, so that complete black insertion is not achieved. That is, when the drive control is individually performed on the light sources A and B, crosstalk occurs due to mutual influence. For example, when the moving image area 104 is in the CR area and a part of the moving image area 102 is included in the CR area, the effect of black insertion in the black insertion periods TB3 and TB4 is reduced. In particular, the moving image area 104 is greatly affected by the light source B even if the light source A is turned off, and the effect of black insertion is reduced.
　なお、クロストークの発生は、光源Ａ、Ｂの点灯（Ｈ）／消灯（Ｌ）のタイミングとは無関係である。 Note that the occurrence of crosstalk is irrelevant to the timing of turning on (H) / turning off (L) of the light sources A and B.
特開２００８－８３４２７号公報JP 2008-83427 A 特開２００５－９９３６７号公報JP 2005-99367 A 特開２００４－３０９５９２号公報JP 2004-309592 A
　本発明は、複数の光源により表示パネルの表示領域を照明するバックライト方式の画像表示装置において、表示領域内に動画領域が存在する場合の画質劣化を抑制する画像表示装置および画像表示方法を提供することを目的とする。 The present invention provides an image display apparatus and an image display method for suppressing image quality degradation when a moving image area exists in a display area in a backlight type image display apparatus that illuminates a display area of a display panel with a plurality of light sources. The purpose is to do.
　本発明の一局面に係る画像表示装置は、入力された映像信号に対応する画像を表示する表示領域を有する表示パネルと、前記映像信号に基づく画像データを前記表示領域に対して書き込む表示制御部と、前記表示パネルの前記表示領域を照明する第１光源および第２光源と、前記第１光源および前記第２光源の点灯および消灯を制御する光源制御部と、を備え、前記表示領域は、前記第１光源および前記第２光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域を有し、前記光源制御部は、前記映像信号に基づき前記表示パネルの前記表示領域内の動画を含む動画領域を抽出し、抽出された前記動画領域の前記表示領域における存在領域を判定し、前記動画領域が前記重複照明表示領域に含まれると判定した場合には、前記表示制御部による前記動画領域に対する前記画像データの書込み期間中は、前記第１光源および前記第２光源を消灯する。 An image display device according to an aspect of the present invention includes a display panel having a display area that displays an image corresponding to an input video signal, and a display control unit that writes image data based on the video signal to the display area. A first light source and a second light source that illuminate the display area of the display panel, and a light source controller that controls turning on and off of the first light source and the second light source, and the display area includes: The first light source and the second light source each have an overlapping illumination display area that is illuminated with an amount of light of a predetermined level or more, and the light source control unit is located in the display area of the display panel based on the video signal. When the moving image area including the moving image is extracted, the existence area in the display area of the extracted moving image area is determined, and the moving image area is determined to be included in the overlapping illumination display area The, during the write period of the image data for the moving picture area by said display control unit turns off the first light source and the second light source.
　本発明の他の局面に係る画像表示装置は、入力された映像信号に対応する画像を表示する表示領域を有する表示パネルと、前記映像信号に基づく画像データを前記表示領域に対して書き込む表示制御部と、前記表示パネルの前記表示領域を照明するＮ（Ｎは２以上の整数）個の第１光源～第Ｎ光源と、前記第１光源～第Ｎ光源の点灯および消灯を制御する光源制御部と、を備え、前記表示領域は、第ｋ光源（ｋは１～（Ｎ－１）の整数）および第（ｋ＋１）光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域を有し、前記光源制御部は、前記映像信号に基づき前記表示パネルの前記表示領域内の動画を含む動画領域を抽出し、抽出された前記動画領域の前記表示領域における存在領域を判定し、前記動画領域が前記重複照明表示領域に含まれると判定した場合には、前記表示制御部による前記動画領域に対する前記画像データの書込み期間中は、前記第ｋ光源および前記第（ｋ＋１）光源を消灯する。 An image display device according to another aspect of the present invention includes a display panel having a display area for displaying an image corresponding to an input video signal, and display control for writing image data based on the video signal to the display area. , N (N is an integer of 2 or more) first light source to N light source for illuminating the display area of the display panel, and light source control for controlling turning on and off of the first light source to N light source And the display area is overlapped and illuminated by the kth light source (k is an integer from 1 to (N−1)) and the (k + 1) light source, each being overlapped with a light amount of a predetermined level or more. The light source control unit extracts a moving image region including a moving image in the display region of the display panel based on the video signal, and determines an existing region in the display region of the extracted moving image region. , The video area When said duplication is determined to be included in the illumination display region, during the write period of the image data for the moving picture area by said display control unit turns off the first k light source and the (k + 1) th light source.
　本発明のさらに他の局面に係る画像表示方法は、入力された映像信号に基づく画像データを表示パネルの表示領域に対して書き込んで前記映像信号に対応する画像を前記表示領域に表示する表示制御ステップと、前記表示パネルの前記表示領域を照明する第１光源および第２光源の点灯および消灯を制御する光源制御ステップと、を含み、前記映像信号に基づき抽出された前記表示パネルの前記表示領域内の動画を含む動画領域が、前記表示領域のうちの前記第１光源および前記第２光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域に含まれる場合には、前記表示制御ステップにおける前記動画領域に対する前記画像データの書込み期間中は、前記光源制御ステップにおいて、前記第１光源および前記第２光源を消灯する。 An image display method according to still another aspect of the present invention is a display control for writing image data based on an input video signal to a display area of a display panel and displaying an image corresponding to the video signal in the display area. And a light source control step for controlling turning on and off of the first light source and the second light source that illuminate the display area of the display panel, and the display area of the display panel extracted based on the video signal When the moving image area including the moving image is included in the overlapping illumination display area that is illuminated by the first light source and the second light source of the display area with a light amount of a predetermined level or more, respectively, During the writing period of the image data for the moving image area in the display control step, the light source control step includes the first light source and the second light source. Source to turn off the.
本発明の実施の形態１における画像表示装置の構成を示すブロック図である。It is a block diagram which shows the structure of the image display apparatus in Embodiment 1 of this invention. 本発明の実施の形態１における画像表示装置の背面図である。It is a rear view of the image display apparatus in Embodiment 1 of this invention. 本発明の実施の形態１における画像表示装置の側面図である。It is a side view of the image display apparatus in Embodiment 1 of this invention. 本発明の実施の形態１における画像表示装置の光源の点灯特性図である。It is a lighting characteristic figure of the light source of the image display apparatus in Embodiment 1 of this invention. 本発明の実施の形態１における画像表示装置の光源の駆動波形図である。It is a drive waveform figure of the light source of the image display apparatus in Embodiment 1 of this invention. 本発明の実施の形態１における動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of the moving image in Embodiment 1 of this invention. 本発明の実施の形態１における動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of the moving image in Embodiment 1 of this invention. 本発明の実施の形態１における動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of the moving image in Embodiment 1 of this invention. 本発明の実施の形態１における動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of the moving image in Embodiment 1 of this invention. 本発明の実施の形態１における動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of the moving image in Embodiment 1 of this invention. 本発明の実施の形態１における２つの動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of two moving images in Embodiment 1 of this invention. 本発明の実施の形態１における２つの動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of two moving images in Embodiment 1 of this invention. 本発明の実施の形態１における２つの動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of two moving images in Embodiment 1 of this invention. 本発明の実施の形態１における２つの動画の表示状態の１例を示す図である。It is a figure which shows an example of the display state of two moving images in Embodiment 1 of this invention. 本発明の実施の形態１において１つの動画領域が存在する場合の光源制御を示すフローチャートである。It is a flowchart which shows light source control in case the one moving image area | region exists in Embodiment 1 of this invention. 本発明の実施の形態２における画像表示装置の構成を示すブロック図である。It is a block diagram which shows the structure of the image display apparatus in Embodiment 2 of this invention. 本発明の実施の形態２における画像表示装置の光源の駆動波形図である。It is a drive waveform figure of the light source of the image display apparatus in Embodiment 2 of this invention. 画像表示装置のＬＥＤを用いた光源の他の構成例を示す図である。It is a figure which shows the other structural example of the light source using LED of an image display apparatus. 画像表示装置のランプを用いた光源の他の構成例を示す図である。It is a figure which shows the other structural example of the light source using the lamp | ramp of an image display apparatus. 第１の従来の画像表示装置において動画領域が１つの場合のバックライト光源の駆動波形図である。It is a drive waveform diagram of a backlight light source when there is one moving image area in the first conventional image display device. 第１の従来の画像表示装置において動画領域が２つの場合のバックライト光源の駆動波形図である。It is a drive waveform diagram of a backlight light source when there are two moving image areas in the first conventional image display device. 第２の従来の画像表示装置におけるバックライト光源の駆動波形図である。It is a drive waveform figure of the backlight light source in the 2nd conventional image display device. 第２の従来の画像表示装置におけるバックライト光源の他の駆動波形図である。It is another drive waveform diagram of the backlight light source in the second conventional image display device.
　以下では、液晶表示装置を一例として本発明の画像表示装置（以下、「本装置」と略記する）の実施の形態を説明しているが、画像表示装置は表示画面を照明する光源を有するものであれば液晶表示装置に限定されるものではない。 In the following, an embodiment of an image display device of the present invention (hereinafter abbreviated as “the present device”) is described taking a liquid crystal display device as an example, but the image display device has a light source that illuminates the display screen. If it is, it is not limited to a liquid crystal display device.
　（実施の形態１）
　図１は、本発明の実施の形態１における本装置１の構成を示すブロック図である。図２ａは本装置１の背面図である。図２ｂは本装置１の側面図である。図２ｃは本装置１の光源の点灯特性図である。 (Embodiment 1)
FIG. 1 is a block diagram showing a configuration of the apparatus 1 according to Embodiment 1 of the present invention. FIG. 2 a is a rear view of the apparatus 1. FIG. 2 b is a side view of the apparatus 1. FIG. 2 c is a lighting characteristic diagram of the light source of the apparatus 1.
　図１に示すように、本装置１は、表示部２、光源制御部８および表示制御部９を備えている。表示部２は、液晶表示パネル４、光源５，６を備えている。液晶表示パネル４は、横方向及び縦方向にマトリクス状に整列された複数の画素を含む表示領域４０（図２ａ）を有する。光源制御部８は、入力される映像信号に基づき、光源５，６を制御する。表示制御部９は、液晶表示パネル４の表示領域４０に対して、データ信号線および走査信号線を用いて、本実施の形態１では液晶表示パネル４の上端に横方向に配列された画素列から下端に横方向に配列された画素列まで、画素ごとに順番に、入力された映像信号に基づく画像データを１回書き込み、これによって１フレームの画像を生成する。表示制御部９により、１フレームの画像生成が所定のフレーム周波数で繰り返されることによって、液晶表示パネル４の表示領域４０に表示される画像が、観察者によって視認される。 As shown in FIG. 1, the apparatus 1 includes a display unit 2, a light source control unit 8, and a display control unit 9. The display unit 2 includes a liquid crystal display panel 4 and light sources 5 and 6. The liquid crystal display panel 4 has a display area 40 (FIG. 2a) including a plurality of pixels arranged in a matrix in the horizontal and vertical directions. The light source control unit 8 controls the light sources 5 and 6 based on the input video signal. The display control unit 9 uses a data signal line and a scanning signal line for the display area 40 of the liquid crystal display panel 4, and in the first embodiment, the pixel array arranged in the horizontal direction at the upper end of the liquid crystal display panel 4. The image data based on the input video signal is written once for each pixel from the pixel row to the pixel array arranged in the horizontal direction at the lower end, thereby generating one frame image. The display controller 9 repeats the generation of an image of one frame at a predetermined frame frequency, so that an image displayed on the display area 40 of the liquid crystal display panel 4 is visually recognized by an observer.
　図２ａ、図２ｂに示すように、本装置１は、液晶表示パネル４などを含む表示部２および表示部２を保持するための保持台３を備えている。また、表示部２の液晶表示パネル４の背面側には表示領域４０の上端部にバックライト用の複数のＬＥＤ５１、５２、・・・、５ｎの集合体としての光源５が配置されている。同様に、表示領域４０の下端部にバックライト用の複数のＬＥＤ６１、６２、・・・、６ｎの集合体としての光源６が配置されている。光源５，６は、ＬＥＤに限られず他の半導体発光材料を使用することができる。 As shown in FIGS. 2a and 2b, the apparatus 1 includes a display unit 2 including a liquid crystal display panel 4 and the like, and a holding table 3 for holding the display unit 2. Further, on the back side of the liquid crystal display panel 4 of the display unit 2, a light source 5 as an aggregate of a plurality of backlight LEDs 51, 52,. Similarly, a light source 6 as an aggregate of a plurality of LEDs 61, 62,..., 6n for backlight is arranged at the lower end of the display area 40. The light sources 5 and 6 are not limited to LEDs, and other semiconductor light emitting materials can be used.
　また、表示部２の液晶表示パネル４の背面には光源５と光源６とを結ぶ位置に導光板７が配置されており、光源５、６からの照明光は、導光板７により面発光に変換されて表示領域４０を照明する。光源５が表示領域４０の略上部を照明し、光源６が表示領域４０の略下部を照明することで、表示領域４０の全領域が所定の明るさで照明される。 In addition, a light guide plate 7 is disposed on the back surface of the liquid crystal display panel 4 of the display unit 2 at a position connecting the light source 5 and the light source 6, and illumination light from the light sources 5 and 6 is emitted into a surface by the light guide plate 7. The display area 40 is illuminated after the conversion. The light source 5 illuminates a substantially upper part of the display area 40 and the light source 6 illuminates a substantially lower part of the display area 40, so that the entire area of the display area 40 is illuminated with a predetermined brightness.
　図２ｃは、光源５、６に基づく導光板７の輝度分布を示し、光源５、６の点灯特性を示している。 FIG. 2 c shows the luminance distribution of the light guide plate 7 based on the light sources 5 and 6 and shows the lighting characteristics of the light sources 5 and 6.
　光源５の輝度５Ｌは、光源５の照明光の照射範囲５Ａにおいて、光源５からの距離（表示部２の液晶表示パネル４の表示領域４０の上端からの距離）に応じて漸減する。また、光源６の輝度６Ｌは、光源６の照明光の照射範囲６Ａにおいて、光源６からの距離（表示部２の液晶表示パネル４の表示領域４０の下端からの距離）に応じて漸減する。本装置１の表示領域４０は、表示部２の液晶表示パネル４の表示領域４０の上端から閾値ＴＨ１の位置までの領域は光源５のみ又は主に光源５により照明され、表示部２の液晶表示パネル４の表示領域４０の下端から閾値ＴＨ２の位置までの領域は光源６のみ又は主に光源６により照明される。なお、光源５、６から重複して照明される表示領域４０の範囲を重複照明範囲ＯＬとする。 The luminance 5L of the light source 5 gradually decreases in accordance with the distance from the light source 5 (the distance from the upper end of the display area 40 of the liquid crystal display panel 4 of the display unit 2) in the illumination light irradiation range 5A of the light source 5. Further, the luminance 6L of the light source 6 gradually decreases in accordance with the distance from the light source 6 (the distance from the lower end of the display area 40 of the liquid crystal display panel 4 of the display unit 2) in the illumination light irradiation range 6A of the light source 6. In the display area 40 of the present apparatus 1, the area from the upper end of the display area 40 of the liquid crystal display panel 4 of the display unit 2 to the position of the threshold value TH1 is illuminated only by the light source 5 or mainly by the light source 5. The area from the lower end of the display area 40 of the panel 4 to the position of the threshold TH2 is illuminated only by the light source 6 or mainly by the light source 6. In addition, the range of the display area 40 illuminated from the light sources 5 and 6 is set as the overlapping illumination range OL.
　なお、図２ｃでは、説明の便宜上、閾値ＴＨ１より上側の領域では光源６の輝度６Ｌ＝０とし、閾値ＴＨ２より下側の領域では光源５の輝度５Ｌ＝０としている。しかし、実際には、いずれの領域においても、輝度５Ｌ，６Ｌは完全にゼロとならない場合が多い。そこで、この実施の形態１では、閾値ＴＨ１は、例えば光源６の輝度６Ｌが、最大輝度（液晶表示パネル４の表示領域４０の下端における輝度）の１０～２０％の範囲で予め設定された輝度（例えば最大輝度の１０％）となる位置に設定している。また、閾値ＴＨ２は、例えば光源５の輝度５Ｌが、最大輝度（液晶表示パネル４の表示領域４０の上端における輝度）の１０～２０％の範囲で予め設定された輝度（例えば最大輝度の１０％）となる位置に設定している。これによって、閾値ＴＨ１から閾値ＴＨ２までの重複照明範囲ＯＬは、それぞれ所定レベル（例えば最大輝度の１０％）以上の光量で、光源５、６により重複して照明されることとなる。また、表示領域４０の上端から閾値ＴＨ１までの領域は、主に光源５により照明され、表示領域４０の下端から閾値ＴＨ２までの領域は、主に光源６により照明される。 In FIG. 2c, for convenience of explanation, the luminance 6L = 0 of the light source 6 is set in the region above the threshold TH1, and the luminance 5L = 0 of the light source 5 is set in the region below the threshold TH2. However, in practice, the luminances 5L and 6L are often not completely zero in any region. Therefore, in the first embodiment, the threshold TH1 is set in advance, for example, when the luminance 6L of the light source 6 is within a range of 10 to 20% of the maximum luminance (luminance at the lower end of the display area 40 of the liquid crystal display panel 4). The position is set to (for example, 10% of the maximum luminance). The threshold value TH2 is set to a preset brightness (for example, 10% of the maximum brightness) in a range of 10 to 20% of the maximum brightness (the brightness at the upper end of the display area 40 of the liquid crystal display panel 4), for example. ). Accordingly, the overlapping illumination range OL from the threshold value TH1 to the threshold value TH2 is illuminated by the light sources 5 and 6 with a light amount equal to or higher than a predetermined level (for example, 10% of the maximum luminance). Further, the area from the upper end of the display area 40 to the threshold value TH1 is mainly illuminated by the light source 5, and the area from the lower end of the display area 40 to the threshold value TH2 is mainly illuminated by the light source 6.
　図２ａに示すように、本装置１の液晶表示パネル４の表示領域４０は、主に光源５により照明される第１照明表示領域４１と、主に光源６により照明される第２照明表示領域４２と、光源５，６により重複して照明される重複照明表示領域４３との３つの領域に区画される。重複照明表示領域４３は、閾値ＴＨ１の位置から閾値ＴＨ２の位置までの領域で、光源５、６によりそれぞれ所定レベル以上の光量で重複して照明される領域である。第１照明表示領域４１は、重複照明表示領域４３の第１光源５側に隣接し、液晶表示パネル４の表示領域４０の上端から閾値ＴＨ１の位置までの領域で、主に光源５により照明される領域である。すなわち、第１照明表示領域４１を照明する照明光の光量は、光源６からの照明光の光量より、光源５からの照明光の光量の方が大きくなっている。第２照明表示領域４２は、重複照明表示領域４３の第２光源６側に隣接し、液晶表示パネル４の表示領域４０の下端から閾値ＴＨ２の位置までの領域で、主に光源６により照明される領域である。すなわち、第２照明表示領域４２を照明する照明光の光量は、光源５からの照明光の光量より、光源６からの照明光の光量の方が大きくなっている。 As shown in FIG. 2 a, the display area 40 of the liquid crystal display panel 4 of the present apparatus 1 includes a first illumination display area 41 mainly illuminated by the light source 5 and a second illumination display area mainly illuminated by the light source 6. 42 and an overlapping illumination display area 43 that is illuminated by light sources 5 and 6 in an overlapping manner. The overlapping illumination display area 43 is an area from the position of the threshold value TH1 to the position of the threshold value TH2, and is an area that is overlappedly illuminated by the light sources 5 and 6 with a light amount of a predetermined level or more. The first illumination display area 41 is adjacent to the first light source 5 side of the overlapping illumination display area 43, and is an area from the upper end of the display area 40 of the liquid crystal display panel 4 to the position of the threshold TH1, and is mainly illuminated by the light source 5. Area. In other words, the amount of illumination light that illuminates the first illumination display area 41 is larger than the amount of illumination light from the light source 6. The second illumination display area 42 is adjacent to the second light source 6 side of the overlapping illumination display area 43, and is an area from the lower end of the display area 40 of the liquid crystal display panel 4 to the position of the threshold TH2, and is mainly illuminated by the light source 6. Area. In other words, the amount of illumination light that illuminates the second illumination display area 42 is greater than the amount of illumination light from the light source 5.
　なお、表示部２の液晶表示パネル４の表示領域４０への画像データの書き込みは、上述のように、表示制御部９により表示領域４０の上端から下端に向かって行われる。 Note that writing of image data to the display area 40 of the liquid crystal display panel 4 of the display unit 2 is performed from the upper end to the lower end of the display area 40 by the display control unit 9 as described above.
　図１に示すように、光源制御部８は、閾値記憶部８０、光源輝度設定部８１、動画領域抽出部８２、存在領域判定部８３、動画優先度判定部８４、ＰＷＭ制御部８５およびＰＷＭパルス発生部８６を備えている。閾値記憶部８０は、予め設定された上記閾値ＴＨ１，ＴＨ２を保存している。 As shown in FIG. 1, the light source control unit 8 includes a threshold storage unit 80, a light source luminance setting unit 81, a moving image region extracting unit 82, an existing region determining unit 83, a moving image priority determining unit 84, a PWM control unit 85, and a PWM pulse. A generator 86 is provided. The threshold storage unit 80 stores the preset thresholds TH1 and TH2.
　光源輝度設定部８１は、光源５、光源６の輝度をＰＷＭ制御部８５に対して設定する。なお、輝度の設定値は、映像の特徴量や外光強度、利用者による設定値などに基づいて決められる。すなわち、光源輝度設定部８１は、例えば入力された映像信号の輝度の平均値を上記映像の特徴量として検出し、検出した平均値が高くなるほど光源５，６の輝度を高く設定する。あるいは、光源輝度設定部８１は、例えば周囲の明るさを検出し、周囲が明るくなるほど、光源５，６の輝度を高く設定するようにしてもよい。あるいは、光源輝度設定部８１は、入力された映像信号の輝度及び周囲の明るさの両方を考慮して、光源５，６の輝度を設定するようにしてもよい。あるいはまた、光源輝度設定部８１は、例えばユーザーが輝度を設定するための入力部を備え、ユーザーによる設定値に応じて光源５，６の輝度を設定するようにしてもよい。光源輝度設定部８１は、本実施の形態１では例えば、輝度を光源５，６の点灯期間および消灯期間として設定する。 The light source luminance setting unit 81 sets the luminance of the light source 5 and the light source 6 for the PWM control unit 85. Note that the luminance setting value is determined based on the feature amount of the video, the external light intensity, the setting value by the user, and the like. That is, the light source luminance setting unit 81 detects, for example, the average value of the luminance of the input video signal as the feature amount of the video, and sets the luminance of the light sources 5 and 6 higher as the detected average value increases. Alternatively, the light source luminance setting unit 81 may detect the brightness of the surroundings and set the luminance of the light sources 5 and 6 higher as the surroundings become brighter. Alternatively, the light source luminance setting unit 81 may set the luminance of the light sources 5 and 6 in consideration of both the luminance of the input video signal and the ambient brightness. Alternatively, the light source luminance setting unit 81 may include an input unit for the user to set the luminance, for example, and may set the luminance of the light sources 5 and 6 according to the setting value by the user. In the first embodiment, for example, the light source luminance setting unit 81 sets the luminance as the lighting period and extinguishing period of the light sources 5 and 6.
　動画領域抽出部８２は、現フレームの動画を検出し、検出した動画を含む動画領域を抽出するものである。動画領域抽出部８２は、例えば、現フレームの映像信号と１フレーム前の映像信号を画素単位で比較し、その差異を１水平走査期間だけ累積加算した値が所定値を超えるか否かで水平走査線上の動画の有無を検出しても良い。 The moving image area extraction unit 82 detects a moving image of the current frame, and extracts a moving image area including the detected moving image. For example, the moving image region extraction unit 82 compares the video signal of the current frame with the video signal of the previous frame in units of pixels, and determines whether or not the value obtained by accumulating the difference for one horizontal scanning period exceeds a predetermined value. You may detect the presence or absence of the moving image on a scanning line.
　存在領域判定部８３は、閾値記憶部８０に保存されている閾値ＴＨ１，ＴＨ２に基づき、動画領域抽出部８２により抽出された動画領域と、上述した第１照明表示領域４１、第２照明表示領域４２、重複照明表示領域４３との関係を判定する。すなわち、存在領域判定部８３は、動画領域が重複照明表示領域４３内に存在するか否か、動画領域が第１照明表示領域４１と重複照明表示領域４３に跨って存在するか否かなどの関係を判定する。そして、存在領域判定部８３は、判定結果を存在領域判定信号として動画優先度判定部８４およびＰＷＭ制御部８５に出力する。 The existence area determination unit 83 includes the moving image area extracted by the moving image area extraction unit 82 based on the threshold values TH1 and TH2 stored in the threshold storage unit 80, the first illumination display area 41, and the second illumination display area described above. 42, the relationship with the overlapping illumination display area 43 is determined. That is, the existence area determination unit 83 determines whether or not the moving image area exists in the overlapping illumination display area 43, whether or not the moving image area exists across the first illumination display area 41 and the overlapping illumination display area 43, and the like. Determine the relationship. Then, the presence region determination unit 83 outputs the determination result as a presence region determination signal to the moving picture priority determination unit 84 and the PWM control unit 85.
　動画優先度判定部８４は、存在領域判定部８３からの存在領域判定信号に基づいて、動画領域が複数ある場合には各動画領域の優先度を求めて最も優先度の高い動画領域を黒挿入の対象と判定する。動画優先度判定部８４は、動画領域が１つの場合にはその動画領域を黒挿入の対象と判定する。動画優先度判定部８４は、黒挿入対象動画領域の情報をＰＷＭ制御部８５に出力する。 Based on the presence area determination signal from the presence area determination section 83, the video priority determination section 84 obtains the priority of each video area and inserts the video area with the highest priority in black when there are a plurality of video areas. It is determined that When there is one moving image area, the moving image priority determination unit 84 determines that the moving image area is a target for black insertion. The moving image priority determination unit 84 outputs information on the black insertion target moving image region to the PWM control unit 85.
　動画優先度判定部８４は、動画領域の特性を検出し、検出した特性に基づいて、動画の優先度を判定する。ここで、上記優先度を判定する動画領域の特性としては、物体の輝度、物体の移動速度、動画領域における高周波成分量、テロップや文字スクロールなどの存在といった動画ボヤケへの関与が大きいものがあげられる。動画領域の特性に基づく優先度のレベルは、動画領域の特性が動画の輝度の場合には、輝度が高くなる程高くなる。すなわち、複数の動画を例えば第１動画と第２動画とすると、動画優先度判定部８４は、第１動画の輝度と第２動画の輝度とをそれぞれ検出し、第１動画の輝度が第２動画の輝度以上のときは、第１動画の優先度が第２動画の優先度以上と判定する。 The moving image priority determination unit 84 detects the characteristics of the moving image area, and determines the priority of the moving image based on the detected characteristics. Here, the characteristics of the moving image area for determining the priority include those having a large contribution to moving image blur such as the brightness of the object, the moving speed of the object, the amount of high frequency components in the moving image area, and the presence of telop and character scroll. It is done. The priority level based on the characteristics of the moving image area is higher as the luminance is higher when the characteristic of the moving image area is the luminance of the moving image. That is, when a plurality of moving images are, for example, a first moving image and a second moving image, the moving image priority determination unit 84 detects the luminance of the first moving image and the luminance of the second moving image, and the luminance of the first moving image is second. When the luminance is higher than the luminance of the moving image, the priority of the first moving image is determined to be higher than the priority of the second moving image.
　また、動画領域の特性が動画の移動速度の場合には、速度が速くなる程、優先度のレベルが高くなる。すなわち、動画優先度判定部８４は、第１動画の移動速度と第２動画の移動速度とを検出し、第１動画の移動速度が第２動画の移動速度以上のときは、第１動画の優先度が第２動画の優先度以上と判定する。 In the case where the moving image moving speed is the moving image characteristic, the higher the speed, the higher the priority level. That is, the moving image priority determination unit 84 detects the moving speed of the first moving image and the moving speed of the second moving image, and when the moving speed of the first moving image is equal to or higher than the moving speed of the second moving image, It is determined that the priority is equal to or higher than the priority of the second moving image.
　また、動画領域の特性が動画領域における高周波成分量の場合には、高周波成分量が多くなる程、優先度のレベルが高くなる。すなわち、動画優先度判定部８４は、第１動画が含まれる動画領域の高周波成分量と第２動画が含まれる動画領域の高周波成分量とを検出し、第１動画が含まれる動画領域の高周波成分量が第２動画が含まれる動画領域の高周波成分量以上のときは、第１動画の優先度が第２動画の優先度以上と判定する。 Also, when the characteristic of the moving image area is the high frequency component amount in the moving image area, the priority level increases as the high frequency component amount increases. That is, the moving image priority determination unit 84 detects the high frequency component amount of the moving image region including the first moving image and the high frequency component amount of the moving image region including the second moving image, and the high frequency of the moving image region including the first moving image. When the component amount is equal to or higher than the high-frequency component amount of the moving image area including the second moving image, the priority of the first moving image is determined to be equal to or higher than the priority of the second moving image.
　また、動画領域の特性がテロップや文字スクロールなどの存在の場合には、テロップや文字スクロールなどが存在する動画領域が存在しない動画領域よりも優先度のレベルが高くなる。すなわち、動画優先度判定部８４は、第１動画が含まれる動画領域においてテロップや文字スクロールなどを検出し、第２動画が含まれる動画領域においてテロップや文字スクロールなどを検出し、第１動画が含まれる動画領域においてテロップや文字スクロールなどが検出され、第２動画が含まれる動画領域においてテロップや文字スクロールなどが検出されないときは、第１動画の優先度が第２動画の優先度より高いと判定する。 In addition, when the characteristics of the moving image area is such as telop or character scroll, the priority level is higher than the moving image area where there is no moving image area where telop or character scroll exists. That is, the moving image priority determination unit 84 detects telop, character scroll, and the like in the moving image region including the first moving image, detects telop, character scroll, and the like in the moving image region including the second moving image, and the first moving image When a telop or character scroll is detected in the included moving image area and no telop or character scroll is detected in the moving image area including the second moving image, the priority of the first moving image is higher than the priority of the second moving image. judge.
　ＰＷＭ制御部８５は、黒挿入対象動画領域が重複照明表示領域４３に含まれる場合には、光源５、光源６に対して黒挿入を行う期間を指定する黒挿入位相信号Ｓｂ５、Ｓｂ６を同じ値にしてＰＷＭパルス発生部８６に出力する。なお、黒挿入を行う期間の長さは、光源輝度設定部８１からの輝度の設定値に基づいて決められる。 When the black insertion target moving image region is included in the overlapping illumination display region 43, the PWM control unit 85 sets the black insertion phase signals Sb5 and Sb6 that specify the period during which black insertion is performed for the light source 5 and the light source 6 to the same value. And output to the PWM pulse generator 86. Note that the length of the period during which black is inserted is determined based on the luminance setting value from the light source luminance setting unit 81.
　ＰＷＭパルス発生部８６は、黒挿入位相信号Ｓｂ５、Ｓｂ６に基づいて、ＰＷＭパルスＰ５、ＰＷＭパルスＰ６を出力し、光源５、光源６を点灯および消灯させる。本実施の形態において、液晶表示パネル４が表示パネルの一例に対応し、光源５が第１光源の一例に対応し、光源６が第２光源の一例に対応する。 PWM pulse generator 86 outputs PWM pulse P5 and PWM pulse P6 based on black insertion phase signals Sb5 and Sb6 to turn on and off light source 5 and light source 6. In the present embodiment, the liquid crystal display panel 4 corresponds to an example of a display panel, the light source 5 corresponds to an example of a first light source, and the light source 6 corresponds to an example of a second light source.
　図３は、本装置１の光源の駆動波形図である。図３では、表示領域４０に対する映像表示用の同期信号とバックライト用の光源５、６の駆動波形との関係を示している。 FIG. 3 is a drive waveform diagram of the light source of the apparatus 1. FIG. 3 shows the relationship between the video display synchronization signal for the display area 40 and the drive waveforms of the light sources 5 and 6 for the backlight.
　図３に示すように、物体Ｍ１が重複照明表示領域４３内を矢印方向に移動しているとき、本装置１は、物体Ｍ１を含む動画領域Ｇ１を抽出する。抽出した動画領域Ｇ１が重複照明表示領域４３に含まれるので、動画領域Ｇ１の走査期間中は光源５、６を消灯して黒挿入期間Ｔを設ける。すなわち、動画領域抽出部８２は、物体Ｍ１を検出し、物体Ｍ１を含む動画領域Ｇ１を抽出する。存在領域判定部８３は、抽出された動画領域Ｇ１が、重複照明表示領域４３に含まれるか否かを判定する。ＰＷＭ制御部８５は、動画領域Ｇ１が重複照明表示領域４３に含まれる場合は、表示制御部９による動画領域Ｇ１に対する画像データの書込み期間中は、光源５，６の両方を消灯して黒挿入期間Ｔを設ける。これにより、重複照明表示領域４３に含まれる動画領域Ｇ１に対して、光源５、６の重複照明によるクロストークの発生を抑制して、動画ボヤケ等のない良好な表示品質を実現することができる。なお、動画領域Ｇ１は、この実施の形態では例えば、物体Ｍ１の図３中、上端から下端までの領域を言う。 As shown in FIG. 3, when the object M1 moves in the overlapping illumination display area 43 in the direction of the arrow, the present apparatus 1 extracts a moving image area G1 including the object M1. Since the extracted moving image area G1 is included in the overlapping illumination display area 43, the light sources 5 and 6 are turned off during the scanning period of the moving image area G1, and the black insertion period T is provided. That is, the moving image region extraction unit 82 detects the object M1 and extracts the moving image region G1 including the object M1. The existence region determination unit 83 determines whether or not the extracted moving image region G1 is included in the overlapping illumination display region 43. When the moving image area G1 is included in the overlapping illumination display area 43, the PWM control unit 85 turns off both the light sources 5 and 6 and inserts black during the image data writing period for the moving image area G1 by the display control unit 9. A period T is provided. Thereby, with respect to the moving image region G1 included in the overlapping illumination display region 43, it is possible to suppress the occurrence of crosstalk due to the overlapping illumination of the light sources 5 and 6, and to realize a good display quality without moving image blur. . In this embodiment, the moving image region G1 refers to a region from the upper end to the lower end in FIG. 3 of the object M1, for example.
　以下に、動画の各種表示状態に対応したＰＷＭ制御部８５による光源５、６の駆動制御について説明する。 Hereinafter, drive control of the light sources 5 and 6 by the PWM control unit 85 corresponding to various display states of moving images will be described.
　まず、１つの動画領域が第１照明表示領域４１、第２照明表示領域４２、重複照明表示領域４３のいずれか１つに含まれる場合について、図４ａ～図４ｃを用いて説明する。 First, the case where one moving image area is included in any one of the first illumination display area 41, the second illumination display area 42, and the overlapping illumination display area 43 will be described with reference to FIGS. 4a to 4c.
　図４ａは、表示領域４０を矢印の方向（右方向）に移動する物体Ｍ１を含む１つの動画領域が重複照明表示領域４３内に含まれる場合を示している。この場合の光源５、６の駆動制御は図３で既に説明した通りである。 FIG. 4a shows a case where one moving image area including the object M1 moving in the direction of the arrow (rightward) in the display area 40 is included in the overlapping illumination display area 43. The drive control of the light sources 5 and 6 in this case is as already described in FIG.
　図４ｂは、物体Ｍ１を含む１つの動画領域が、主に光源５により照明される第１照明表示領域４１に含まれる場合を示している。この場合は物体Ｍ１の走査期間中に光源５を消灯して黒挿入を行う。また、光源６については物体Ｍ１の走査期間とは関係なく所定のタイミングで消灯する。すなわち、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ１に対する画像データの書込み期間中は、光源５を消灯して黒挿入期間を設ける。また、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ１に対する画像データの書込み期間に関係なく、所定のタイミングで光源６を消灯する。これにより、第１照明表示領域４１に含まれる動画Ｍ１に対して、光源５の照明によるクロストークの発生を抑制して、動画ボヤケ等のない良好な表示品質を実現することができる。 FIG. 4b shows a case where one moving image area including the object M1 is included in the first illumination display area 41 mainly illuminated by the light source 5. In this case, the light source 5 is turned off during the scanning period of the object M1, and black insertion is performed. The light source 6 is turned off at a predetermined timing regardless of the scanning period of the object M1. That is, the PWM control unit 85 turns off the light source 5 and provides a black insertion period during the writing period of the image data for the object M1 by the display control unit 9. The PWM control unit 85 turns off the light source 6 at a predetermined timing regardless of the writing period of the image data for the object M1 by the display control unit 9. Thereby, with respect to the moving image M1 included in the first illumination display area 41, it is possible to suppress the occurrence of crosstalk due to the illumination of the light source 5, and to realize good display quality without moving image blur and the like.
　図４ｃは、物体Ｍ１を含む１つの動画領域が、主に光源６により照明される第２照明表示領域４２に含まれる場合を示している。この場合は物体Ｍ１の走査期間中に光源６を消灯して黒挿入を行う。また、光源５については物体Ｍ１の走査期間とは関係なく所定のタイミングで消灯する。すなわち、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ１に対する画像データの書込み期間中は、光源６を消灯して黒挿入期間を設ける。また、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ１に対する画像データの書込み期間に関係なく、所定のタイミングで光源５を消灯する。これにより、第２照明表示領域４２に含まれる動画Ｍ１に対して、光源６の照明によるクロストークの発生を抑制して、動画ボヤケ等のない良好な表示品質を実現することができる。 FIG. 4c shows a case where one moving image area including the object M1 is included in the second illumination display area 42 mainly illuminated by the light source 6. In this case, the light source 6 is turned off during the scanning period of the object M1, and black insertion is performed. The light source 5 is turned off at a predetermined timing regardless of the scanning period of the object M1. That is, the PWM control unit 85 turns off the light source 6 and provides a black insertion period during the writing period of the image data for the object M1 by the display control unit 9. Further, the PWM control unit 85 turns off the light source 5 at a predetermined timing regardless of the writing period of the image data for the object M1 by the display control unit 9. Thereby, with respect to the moving image M1 included in the second illumination display area 42, it is possible to suppress the occurrence of crosstalk due to the illumination of the light source 6, and to realize good display quality without moving image blur and the like.
　次に、１つの動画領域の一部が重複照明表示領域４３に含まれる場合について、図５および図６を用いて説明する。 Next, a case where a part of one moving image area is included in the overlapping illumination display area 43 will be described with reference to FIGS.
　図５は、表示領域４０を矢印の方向（右方向）に移動する物体Ｍ２を含む１つの動画領域Ｇ２が、第１照明表示領域４１と重複照明表示領域４３とに跨る場合を示している。 FIG. 5 shows a case where one moving image region G2 including the object M2 moving in the direction of the arrow (rightward) in the display region 40 straddles the first illumination display region 41 and the overlapping illumination display region 43.
　この場合、動画領域Ｇ２と重複照明表示領域４３が重なる領域を領域Ｌ３、動画領域Ｇ２と第１照明表示領域４１が重なる領域を領域Ｌ１とし、領域Ｌ３と領域Ｌ１の大きさを比較する。図５に示したように領域Ｌ３が領域Ｌ１よりも大きい場合には、領域Ｌ３の走査期間中は光源５、６を同時に消灯して黒挿入を行う。すなわち、ＰＷＭ制御部８５は、存在領域判定部８３により、動画領域Ｇ２が第１照明表示領域４１と重複照明表示領域４３とに跨って存在すると判定された場合は、領域Ｌ３と領域Ｌ１の大きさを比較する。ＰＷＭ制御部８５は、領域Ｌ３が領域Ｌ１よりも大きい場合には、表示制御部９による領域Ｌ３に対する画像データの書込み期間中は、光源５、６を同時に消灯して黒挿入期間を設ける。なお、動画領域Ｇ２が第２照明表示領域４２と重複照明表示領域４３に跨る場合も光源５、６の駆動制御は同様なものとなる。 In this case, a region where the moving image region G2 and the overlapping illumination display region 43 overlap is defined as a region L3, a region where the moving image region G2 and the first illumination display region 41 overlap is defined as a region L1, and the sizes of the region L3 and the region L1 are compared. As shown in FIG. 5, when the region L3 is larger than the region L1, the light sources 5 and 6 are turned off simultaneously during the scanning period of the region L3 to perform black insertion. That is, when the presence area determination unit 83 determines that the moving image area G2 exists across the first illumination display area 41 and the overlapping illumination display area 43, the PWM controller 85 determines the size of the area L3 and the area L1. Compare When the region L3 is larger than the region L1, the PWM control unit 85 simultaneously turns off the light sources 5 and 6 to provide a black insertion period during the image data writing period for the region L3 by the display control unit 9. The drive control of the light sources 5 and 6 is the same when the moving image area G2 extends over the second illumination display area 42 and the overlapping illumination display area 43.
　図６は、表示領域４０を矢印の方向（右方向）に移動する物体Ｍ２を含む１つの動画領域Ｇ３が、第１照明表示領域４１と重複照明表示領域４３に跨る場合を示している。 FIG. 6 shows a case where one moving image region G3 including the object M2 moving in the direction of the arrow (rightward) in the display region 40 straddles the first illumination display region 41 and the overlapping illumination display region 43.
　この場合、動画領域Ｇ３と重複照明表示領域４３が重なる領域を領域Ｌ３、動画領域Ｇ３と領域４１が重なる領域を領域Ｌ１とし、領域Ｌ３と領域Ｌ１の大きさを比較する。図６に示したように領域Ｌ３が領域Ｌ１よりも小さい場合には、領域Ｌ１の走査期間中は光源５を消灯して黒挿入を行う。また、光源６については物体Ｍ２の走査期間とは関係なく所定のタイミングで消灯する。すなわち、ＰＷＭ制御部８５は、存在領域判定部８３により、動画領域Ｇ２が第１照明表示領域４１と重複照明表示領域４３とに跨って存在すると判定された場合は、領域Ｌ３と領域Ｌ１の大きさを比較する。ＰＷＭ制御部８５は、領域Ｌ３が領域Ｌ１よりも小さい場合には、表示制御部９による領域Ｌ１に対する画像データの書込み期間中は、光源５を消灯して黒挿入期間を設ける。また、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ２に対する画像データの書込み期間に関係なく、所定のタイミングで光源６を消灯する。なお、動画領域Ｇ３が第２照明表示領域４２と重複照明表示領域４３に跨る場合も光源５、６の駆動制御は同様なものとなる。本実施の形態において、領域Ｌ１が第１重畳領域の一例に対応し、領域Ｌ３が第２重畳領域の一例に対応する。 In this case, a region where the moving image region G3 and the overlapping illumination display region 43 overlap is a region L3, a region where the moving image region G3 and the region 41 overlap is a region L1, and the sizes of the region L3 and the region L1 are compared. As shown in FIG. 6, when the region L3 is smaller than the region L1, the light source 5 is turned off and black insertion is performed during the scanning period of the region L1. The light source 6 is turned off at a predetermined timing regardless of the scanning period of the object M2. That is, when the presence area determination unit 83 determines that the moving image area G2 exists across the first illumination display area 41 and the overlapping illumination display area 43, the PWM controller 85 determines the size of the area L3 and the area L1. Compare When the region L3 is smaller than the region L1, the PWM control unit 85 turns off the light source 5 and provides a black insertion period during the image data writing period for the region L1 by the display control unit 9. Further, the PWM control unit 85 turns off the light source 6 at a predetermined timing regardless of the writing period of the image data for the object M2 by the display control unit 9. The drive control of the light sources 5 and 6 is the same when the moving image area G3 extends over the second illumination display area 42 and the overlapping illumination display area 43. In the present embodiment, the region L1 corresponds to an example of a first overlapping region, and the region L3 corresponds to an example of a second overlapping region.
　なお、図５および図６においては、例えば図５においては、領域Ｌ３と領域Ｌ１の大きさを比較し、領域Ｌ３が領域Ｌ１よりも大きい場合には、領域Ｌ３の走査期間中は光源５、６を同時に消灯して黒挿入を行う例を挙げて説明した。ここで、光源輝度設定部８１からの設定輝度によっては、領域Ｌ１の期間中も光源５，６を同時消灯することが可能である。この場合、光源輝度設定部８１からの設定輝度に対応した黒挿入期間の幅と動画領域Ｇ２の垂直方向の高さを比較し、光源輝度設定部８１からの設定輝度に対応した黒挿入期間の幅が動画領域Ｇ２の垂直方向の高さよりも大きい場合は、領域Ｌ３に加え領域Ｌ１の期間中も光源５，６を同時消灯することとしても良い。すなわち、ＰＷＭ制御部８５は、光源輝度設定部８１により設定された輝度に対応する黒挿入期間の幅と、動画領域Ｇ２の垂直方向の高さ（つまり図５中、縦方向の長さ）とを比較する。ＰＷＭ制御部８５は、黒挿入期間の幅が動画領域Ｇ２の垂直方向の高さより大きい場合は、表示制御部９による領域Ｌ３，Ｌ１に対する画像データの書込み期間中は、光源５，６を同時に消灯するようにしてもよい。図６においても同様である。 5 and FIG. 6, for example, in FIG. 5, the sizes of the region L3 and the region L1 are compared. When the region L3 is larger than the region L1, the light source 5, An example in which 6 is turned off simultaneously and black insertion is performed has been described. Here, depending on the set brightness from the light source brightness setting unit 81, the light sources 5 and 6 can be turned off simultaneously during the period of the region L1. In this case, the width of the black insertion period corresponding to the set luminance from the light source luminance setting unit 81 is compared with the height in the vertical direction of the moving image region G2, and the black insertion period corresponding to the set luminance from the light source luminance setting unit 81 is compared. When the width is larger than the vertical height of the moving image area G2, the light sources 5 and 6 may be turned off simultaneously during the period of the area L1 in addition to the area L3. That is, the PWM control unit 85 determines the width of the black insertion period corresponding to the luminance set by the light source luminance setting unit 81 and the vertical height of the moving image area G2 (that is, the vertical length in FIG. 5). Compare When the width of the black insertion period is larger than the vertical height of the moving image area G2, the PWM control section 85 turns off the light sources 5 and 6 simultaneously during the image data writing period to the areas L3 and L1 by the display control section 9. You may make it do. The same applies to FIG.
　また、図５および図６においては、例えば図５では、領域Ｌ３と領域Ｌ１の大きさを比較し、領域Ｌ３が領域Ｌ１よりも大きい（Ｌ３＞Ｌ１）場合に、領域Ｌ３に対する画像データの書込み期間中は、光源５、６を同時に消灯して黒挿入を行っているが、これに限られない。例えば、領域Ｌ３のサイズが領域Ｌ１のサイズの１／３以上の場合に、光源５、６を同時に消灯して黒挿入を行うようにしてもよい。すなわち、存在領域判定部８３により、動画領域Ｇ２の１／４以上が重複照明表示領域４３に重なっていると判定された場合に、ＰＷＭ制御部８５は、表示制御部９による領域Ｌ３に対する画像データの書込み期間中に、光源５、６を同時に消灯して黒挿入期間を設けるようにしてもよい。これによって、最も目立つ重複照明表示領域４３におけるクロストークの発生を抑制して、動画ボヤケ等のない良好な表示品質を実現することができる。 In FIGS. 5 and 6, for example, in FIG. 5, the sizes of the region L3 and the region L1 are compared. When the region L3 is larger than the region L1 (L3> L1), image data is written to the region L3. During the period, the light sources 5 and 6 are turned off at the same time to insert black, but this is not a limitation. For example, when the size of the region L3 is 1/3 or more of the size of the region L1, the light sources 5 and 6 may be turned off simultaneously to perform black insertion. That is, when the presence area determination unit 83 determines that ¼ or more of the moving image area G2 overlaps the overlapping illumination display area 43, the PWM control unit 85 performs image data for the area L3 by the display control unit 9. During the writing period, the light sources 5 and 6 may be turned off simultaneously to provide a black insertion period. As a result, it is possible to suppress the occurrence of crosstalk in the most conspicuous overlapping illumination display region 43 and realize a good display quality without moving image blur.
　あるいはまた、領域Ｌ１と領域Ｌ３との大きさを比較することなく、領域Ｌ３が存在する場合に、光源５、６を同時に消灯して黒挿入を行うようにしてもよい。すなわち、存在領域判定部８３により、動画領域Ｇ２の一部である領域Ｌ３が重複照明表示領域４３に含まれると判定された場合に、ＰＷＭ制御部８５は、表示制御部９による領域Ｌ３に対する画像データの書込み期間中に、光源５、６を同時に消灯して黒挿入期間を設けるようにしてもよい。このように、動画領域Ｇ２の一部が重複照明表示領域４３に含まれる場合に、光源５、６を同時に消灯することで、最も目立つ重複照明表示領域４３におけるクロストークの発生を確実に抑制して、動画ボヤケ等のない良好な表示品質を実現することができる。 Alternatively, without comparing the sizes of the region L1 and the region L3, when the region L3 exists, the light sources 5 and 6 may be turned off simultaneously to perform black insertion. That is, when the presence region determination unit 83 determines that the region L3 that is a part of the moving image region G2 is included in the overlapping illumination display region 43, the PWM control unit 85 performs an image on the region L3 by the display control unit 9. During the data writing period, the light sources 5 and 6 may be turned off simultaneously to provide a black insertion period. As described above, when a part of the moving image area G2 is included in the overlapping illumination display area 43, the light sources 5 and 6 are turned off at the same time, thereby reliably suppressing the occurrence of crosstalk in the most prominent overlapping illumination display area 43. Thus, it is possible to realize a good display quality without moving image blur.
　次に、２つの動画領域のそれぞれが第１照明表示領域４１、第２照明表示領域４２、重複照明表示領域４３のいずれか１つに含まれる場合について、図７ａ～図７ｃを用いて説明する。 Next, a case where each of the two moving image areas is included in any one of the first illumination display area 41, the second illumination display area 42, and the overlapping illumination display area 43 will be described with reference to FIGS. 7a to 7c. .
　図７ａ～図７ｃは、右方向に移動する物体Ｍ１を含む動画領域と左方向に移動する物体Ｍ３を含む動画領域が存在する場合を示している。この場合には、動画優先度判定部８４は、物体Ｍ１を含む動画領域の特性と物体Ｍ３を含む動画領域の特性を検出して、それら検出した特性に基づいて物体Ｍ１と物体Ｍ３の優先度を判定する。 FIGS. 7a to 7c show a case where there is a moving image area including the object M1 moving in the right direction and a moving image area including the object M3 moving in the left direction. In this case, the moving picture priority determination unit 84 detects the characteristics of the moving picture area including the object M1 and the characteristics of the moving picture area including the object M3, and the priorities of the objects M1 and M3 based on the detected characteristics. Determine.
　図７ａは、第１照明表示領域４１内の物体Ｍ３の優先度が、重複照明表示領域４３内の物体Ｍ１の優先度より高い場合を示している。この場合には、物体Ｍ３の動画領域の走査期間中は光源５を消灯し、物体Ｍ１の動画領域の走査期間中は光源６を消灯する。すなわち、図７ａでは、動画優先度判定部８４は、物体Ｍ３の優先度が、物体Ｍ１の優先度より高いと判定する。この場合、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ３を含む動画領域に対する画像データの書込み期間中は、光源５を消灯して黒挿入期間を設ける。また、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ１を含む動画領域に対する画像データの書込み期間中は、光源６を消灯して黒挿入期間を設ける。 FIG. 7a shows a case where the priority of the object M3 in the first illumination display area 41 is higher than the priority of the object M1 in the overlapping illumination display area 43. In this case, the light source 5 is turned off during the scanning period of the moving image region of the object M3, and the light source 6 is turned off during the scanning period of the moving image region of the object M1. That is, in FIG. 7a, the moving image priority determination unit 84 determines that the priority of the object M3 is higher than the priority of the object M1. In this case, the PWM control unit 85 turns off the light source 5 and provides a black insertion period during the image data writing period for the moving image area including the object M3 by the display control unit 9. Further, the PWM control unit 85 turns off the light source 6 and provides a black insertion period during the writing period of the image data for the moving image area including the object M1 by the display control unit 9.
　図７ｂは、重複照明表示領域４３内の物体Ｍ１の優先度が第２照明表示領域４２内の物体Ｍ３の優先度より高いか同等の場合を示している。この場合には、物体Ｍ１の動画領域の走査期間中は光源５、６を同時に消灯する。すなわち、図７ｂでは、動画優先度判定部８４は、物体Ｍ１の優先度が、物体Ｍ３の優先度より高いか同等と判定する。この場合、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ１を含む動画領域に対する画像データの書込み期間中は、光源５，６を両方とも消灯して黒挿入期間を設ける。本実施の形態において、物体Ｍ１が第１動画の一例に対応し、物体Ｍ１を含む動画領域が第１動画領域の一例に対応し、物体Ｍ３が第２動画の一例に対応し、物体Ｍ３を含む動画領域が第２動画領域の一例に対応する。 FIG. 7b shows a case where the priority of the object M1 in the overlapping illumination display area 43 is higher than or equal to the priority of the object M3 in the second illumination display area. In this case, the light sources 5 and 6 are turned off simultaneously during the scanning period of the moving image area of the object M1. That is, in FIG. 7b, the moving image priority determination unit 84 determines that the priority of the object M1 is higher than or equal to the priority of the object M3. In this case, the PWM control unit 85 turns off both the light sources 5 and 6 and provides a black insertion period during the writing period of the image data for the moving image area including the object M1 by the display control unit 9. In the present embodiment, the object M1 corresponds to an example of the first moving image, the moving image region including the object M1 corresponds to an example of the first moving image region, the object M3 corresponds to an example of the second moving image, and the object M3 is The moving image area included corresponds to an example of the second moving image area.
　図７ｃは、重複照明表示領域４３内の物体Ｍ１の優先度が物体Ｍ３より高いか同等の場合を示している。この場合には、物体Ｍ１を含む動画領域の走査期間中は光源５、６を同時に消灯する。すなわち、図７ｃでは、動画優先度判定部８４は、物体Ｍ１の優先度が、物体Ｍ３の優先度より高いか同等と判定する。この場合、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ１を含む動画領域に対する画像データの書込み期間中は、光源５，６を両方とも消灯して黒挿入期間を設ける。同様に、図７ｃにおいて物体Ｍ３の優先度が物体Ｍ１より高いか同等の場合には、物体Ｍ３を含む動画領域の走査期間中は光源５、６を同時に消灯する。但し、光源輝度設定部８１からの設定輝度によっては、物体Ｍ１及び物体Ｍ３の双方を含む走査期間中に光源５、６を同時に消灯し、物体Ｍ１，Ｍ３の双方の動画ボヤケを低減させることが出来る。すなわち、光源輝度設定部８１により設定された輝度が低く、光源５，６の消灯期間が、表示制御部９による物体Ｍ１，Ｍ３に対する画像データの書込み期間より長い場合には、ＰＷＭ制御部８５は、物体Ｍ１，Ｍ３に対する画像データの書込み期間中は、光源５，６を消灯してもよい。 FIG. 7c shows a case where the priority of the object M1 in the overlapping illumination display area 43 is higher than or equal to that of the object M3. In this case, the light sources 5 and 6 are turned off simultaneously during the scanning period of the moving image area including the object M1. That is, in FIG. 7c, the moving image priority determination unit 84 determines that the priority of the object M1 is higher than or equal to the priority of the object M3. In this case, the PWM control unit 85 turns off both the light sources 5 and 6 and provides a black insertion period during the writing period of the image data for the moving image area including the object M1 by the display control unit 9. Similarly, in FIG. 7c, when the priority of the object M3 is higher than or equal to that of the object M1, the light sources 5 and 6 are turned off simultaneously during the scanning period of the moving image area including the object M3. However, depending on the set brightness from the light source brightness setting unit 81, the light sources 5 and 6 may be turned off at the same time during the scanning period including both the object M1 and the object M3 to reduce the motion blur of both the objects M1 and M3. I can do it. That is, when the luminance set by the light source luminance setting unit 81 is low and the extinction period of the light sources 5 and 6 is longer than the image data writing period for the objects M1 and M3 by the display control unit 9, the PWM control unit 85 The light sources 5 and 6 may be turned off during the image data writing period for the objects M1 and M3.
　なお、光源輝度設定部８１により設定された輝度に基づく光源５，６の消灯期間が、表示制御部９による物体Ｍ１に対する画像データの書込み期間および物体Ｍ３に対する画像データの書込み期間を加算した和より短いが、物体Ｍ１に対する画像データの書込み期間より長いため、物体Ｍ３に対する画像データの書込み期間の一部の期間だけでも光源５，６を消灯できる場合には、物体Ｍ３の動画ボヤケを可能な限り低減することができる。また、光源輝度設定部８１により設定された輝度に基づく光源５，６の消灯期間が、表示制御部９による物体Ｍ１に対する画像データの書込み期間および物体Ｍ３に対する画像データの書込み期間を加算した和より短い場合には、ＰＷＭ制御部８５は、物体Ｍ１，Ｍ３に対する画像データの書込み期間の略中央に、光源５，６の消灯期間を設けるようにしてもよい。これによって、物体Ｍ１，Ｍ３の各々一部ではあるが、両方の動画ボヤケを可能な限り低減することができる。また、光源輝度設定部８１により設定された輝度に基づく光源５，６の消灯期間が、表示制御部９による物体Ｍ１に対する画像データの書込み期間および物体Ｍ３に対する画像データの書込み期間を加算した和より短いが、表示制御部９による物体Ｍ１に対する画像データの書込み期間より長い場合には、ＰＷＭ制御部８５は、物体Ｍ１に対する画像データの書込み期間終了後、一旦光源５，６を点灯させて、物体Ｍ３に対する画像データの書込み期間開始後に、再び光源５，６を消灯させるようにしてもよい。これによって、光源輝度設定部８１により設定された輝度を維持しながら、物体Ｍ３の動画ボヤケを可能な限り低減することができる。 Note that the extinction period of the light sources 5 and 6 based on the luminance set by the light source luminance setting unit 81 is the sum of the addition of the image data writing period to the object M1 and the image data writing period to the object M3 by the display control unit 9. Although it is shorter but longer than the image data writing period for the object M1, if the light sources 5 and 6 can be turned off only during a part of the image data writing period for the object M3, the moving image blur of the object M3 is as much as possible. Can be reduced. Further, the extinction period of the light sources 5 and 6 based on the luminance set by the light source luminance setting unit 81 is the sum of adding the image data writing period to the object M1 and the image data writing period to the object M3 by the display control unit 9. In a short case, the PWM controller 85 may provide a light extinguishing period of the light sources 5 and 6 approximately at the center of the image data writing period for the objects M1 and M3. Thereby, although it is a part of each of the objects M1 and M3, both moving image blurs can be reduced as much as possible. Further, the extinction period of the light sources 5 and 6 based on the luminance set by the light source luminance setting unit 81 is the sum of adding the image data writing period to the object M1 and the image data writing period to the object M3 by the display control unit 9. If it is shorter but longer than the image data writing period for the object M1 by the display controller 9, the PWM controller 85 once turns on the light sources 5 and 6 after the image data writing period for the object M1 ends. The light sources 5 and 6 may be turned off again after the start of the image data writing period for M3. Thus, the moving image blur of the object M3 can be reduced as much as possible while maintaining the luminance set by the light source luminance setting unit 81.
　なお、上記図７ａ～図７ｃにおいて、優先度の低い物体を含む動画領域が第１照明表示領域４１（あるいは第２照明表示領域４２）と重複照明表示領域４３とに跨っている場合でも、ＰＷＭ制御部８５による光源５、６に対する駆動制御（点灯／消灯）は、優先度の高い物体を含む動画領域が第１照明表示領域４１、第２照明表示領域４２、重複照明表示領域４３のどの領域に含まれるかに基づいて行われる。したがって、光源５、６に対する駆動制御は、図７ａ～図７ｃで説明したものと変わらない。 In FIGS. 7a to 7c, even when the moving image area including the low priority object extends over the first illumination display area 41 (or the second illumination display area 42) and the overlapping illumination display area 43, the PWM In the drive control (lighting / extinguishing) for the light sources 5 and 6 by the control unit 85, the moving image region including the high priority object is any region of the first illumination display region 41, the second illumination display region 42, and the overlapping illumination display region 43. Based on whether it is included in Accordingly, the drive control for the light sources 5 and 6 is the same as that described with reference to FIGS. 7a to 7c.
　図８は、右方向に移動する物体Ｍ６を含む動画領域が重複照明表示領域４３内に含まれ、右方向に移動する物体Ｍ７（テロップ）を含む動画領域が第２照明表示領域４２内に含まれる場合を示している。この場合は図７ａと同様であり、物体Ｍ７（テロップ）の優先度が物体Ｍ６の優先度より高いため、重複照明表示領域４３内に含まれる物体Ｍ６の走査期間中は光源５が消灯され、第２照明表示領域４２内に含まれる物体Ｍ７（テロップ）の走査期間中は光源６が消灯される。すなわち、動画優先度判定部８４は、動画を含む動画領域の特性として、テロップや文字スクロールなどの存在を検出し、物体Ｍ７（テロップ）の優先度が物体Ｍ６の優先度より高いと判定する。ＰＷＭ制御部８５は、表示制御部９による物体Ｍ６を含む動画領域に対する画像データの書込み期間中は、光源５を消灯して黒挿入期間を設ける。また、ＰＷＭ制御部８５は、表示制御部９による物体Ｍ７を含む動画領域に対する画像データの書込み期間中は、光源６を消灯して黒挿入期間を設ける。なお、優先度の高い物体Ｍ７（テロップ）を含む動画領域が第１照明表示領域４１内に含まれ、且つ、優先度の低い物体Ｍ６を含む動画領域が重複照明表示領域４３に含まれる場合には、ＰＷＭ制御部８５は、優先度の高い物体Ｍ７（テロップ）を含む動画領域に対する画像データの書込み期間中は、光源５を消灯し、優先度の低い物体Ｍ６を含む動画領域に対する画像データの書込み期間中は、光源６を消灯すればよい。 In FIG. 8, the moving image area including the object M6 moving in the right direction is included in the overlapping illumination display area 43, and the moving image area including the object M7 (telop) moving in the right direction is included in the second illumination display area 42. Shows the case. In this case, it is the same as FIG. 7a, and since the priority of the object M7 (telop) is higher than the priority of the object M6, the light source 5 is turned off during the scanning period of the object M6 included in the overlapping illumination display area 43, During the scanning period of the object M7 (telop) included in the second illumination display area 42, the light source 6 is turned off. That is, the moving image priority determination unit 84 detects the presence of a telop or character scroll as the characteristics of the moving image region including the moving image, and determines that the priority of the object M7 (telop) is higher than the priority of the object M6. The PWM control unit 85 turns off the light source 5 and provides a black insertion period during the writing period of the image data for the moving image area including the object M6 by the display control unit 9. Further, the PWM control unit 85 turns off the light source 6 and provides a black insertion period during the writing period of the image data for the moving image area including the object M7 by the display control unit 9. In addition, when the moving image area including the high priority object M7 (telop) is included in the first illumination display area 41, and the moving image area including the low priority object M6 is included in the overlapping illumination display area 43. The PWM control unit 85 turns off the light source 5 during the writing period of the image data for the moving image area including the object M7 (telop) with high priority, and the image data for the moving image area including the object M6 with low priority. During the writing period, the light source 6 may be turned off.
　このように、２つの動画領域が存在する場合であっても、動画領域の特性に基づく優先度を設けることで、効果的にクロストークの発生を軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 In this way, even when two moving image areas exist, a high-quality image that effectively reduces the occurrence of crosstalk and suppresses moving image blur by providing a priority based on the characteristics of the moving image area. Display can be realized.
　図９は、実施の形態１の本装置１において、１つの動画領域が存在する場合の光源制御を示すフローチャートである。 FIG. 9 is a flowchart showing the light source control when there is one moving image area in the apparatus 1 of the first embodiment.
　ステップＳ１で、表示制御部９は、映像信号に基づいて液晶表示パネル４に画像表示を行って、ステップＳ２に移る。 In step S1, the display control unit 9 displays an image on the liquid crystal display panel 4 based on the video signal, and proceeds to step S2.
　ステップＳ２で、動画領域抽出部８２は、動画を検出し、検出した動画を含む動画領域を抽出し、抽出した動画領域の情報を存在領域判定部８３に出力して、ステップＳ３に移る。 In step S2, the moving image region extracting unit 82 detects a moving image, extracts a moving image region including the detected moving image, outputs the extracted moving image region information to the existing region determining unit 83, and proceeds to step S3.
　ステップＳ３で、存在領域判定部８３は、抽出された動画領域と第１照明表示領域４１、第２照明表示領域４２、重複照明表示領域４３との関係を判定して、存在領域判定信号をＰＷＭ制御部８５に出力する。動画領域が重複照明表示領域４３に含まれる場合はステップＳ４に移り、含まれない場合はステップＳ５に移る。 In step S3, the presence area determination unit 83 determines the relationship between the extracted moving image area and the first illumination display area 41, the second illumination display area 42, and the overlapping illumination display area 43, and outputs the existence area determination signal to the PWM. Output to the controller 85. If the moving image area is included in the overlapping illumination display area 43, the process proceeds to step S4. If not included, the process proceeds to step S5.
　ステップＳ４で、ＰＷＭ制御部８５は、同じ値の黒挿入位相信号Ｓｂ５、Ｓｂ６を生成してＰＷＭパルス発生部８６に出力することで、重複照明表示領域４３に含まれる動画領域の走査期間中は光源５、光源６を同時消灯する。その後、ステップＳ２に移って次のフレームに対する処理を行う。 In step S4, the PWM control unit 85 generates the black insertion phase signals Sb5 and Sb6 having the same value and outputs the black insertion phase signals Sb5 and Sb6 to the PWM pulse generation unit 86, so that the moving image region included in the overlapping illumination display region 43 is scanned during the scanning period. The light source 5 and the light source 6 are turned off simultaneously. Thereafter, the process proceeds to step S2 to perform processing for the next frame.
　一方、ステップＳ５で、ＰＷＭ制御部８５は、存在領域判定信号に基づいて個別に黒挿入位相信号Ｓｂ５、Ｓｂ６を生成してＰＷＭパルス発生部８６に出力することで、光源５、光源６を個別制御する。その後、ステップＳ２に移って次のフレームに対する処理を行う。 On the other hand, in step S5, the PWM control unit 85 individually generates the black insertion phase signals Sb5 and Sb6 based on the existence region determination signal and outputs the black insertion phase signals Sb5 and Sb6 to the PWM pulse generation unit 86, whereby the light source 5 and the light source 6 are individually provided. Control. Thereafter, the process proceeds to step S2 to perform processing for the next frame.
　（実施の形態２）
　図１０は、実施の形態２における本装置１の構成を示すブロック図である。図１１は、大きさが大きくなりながら右方向に移動する物体Ｍ８が表示される場合の光源の駆動波形を示す図である。図１０では、図１に示される上記実施の形態１と同様の機能を有する構成には同一の符号が付されている。 (Embodiment 2)
FIG. 10 is a block diagram illustrating a configuration of the apparatus 1 according to the second embodiment. FIG. 11 is a diagram illustrating a driving waveform of the light source when the object M8 moving in the right direction while being enlarged is displayed. In FIG. 10, the same reference numerals are given to configurations having the same functions as those in the first embodiment shown in FIG. 1.
　図１０に示すように、実施の形態２の光源制御部８は、上記実施の形態１の構成に加え、動画領域サイズ算出部８７および黒挿入期間リミッタ部８８を備えている。 As shown in FIG. 10, the light source control unit 8 of the second embodiment includes a moving image area size calculation unit 87 and a black insertion period limiter unit 88 in addition to the configuration of the first embodiment.
　動画領域サイズ算出部８７は、動画領域抽出部８２により抽出された動画領域が重複照明表示領域４３に含まれると存在領域判定部８３により判定されたことを示す存在領域判定信号が入力された場合に、抽出された動画領域のサイズを算出し、算出結果に応じた黒挿入期間を黒挿入期間リミッタ部８８に出力する。 When the moving region size calculation unit 87 receives a presence region determination signal indicating that the moving region extracted by the moving region extraction unit 82 is included in the overlapping illumination display region 43 by the presence region determination unit 83 Then, the size of the extracted moving image area is calculated, and the black insertion period corresponding to the calculation result is output to the black insertion period limiter unit 88.
　黒挿入期間リミッタ部８８は、動画領域サイズ算出部８７によって出力された黒挿入期間が重複照明表示領域４３に相当する期間より小さい場合にはそのままの値を、大きい場合には黒挿入期間を重複照明表示領域４３に相当する期間に制限した値をＰＷＭ制御部８５に出力する。 The black insertion period limiter 88 overlaps the same value when the black insertion period output by the moving image area size calculation unit 87 is smaller than the period corresponding to the overlapping illumination display area 43, and overlaps the black insertion period when it is larger. A value limited to a period corresponding to the illumination display area 43 is output to the PWM control unit 85.
　ＰＷＭ制御部８５は、動画優先度判定部８４が出力する黒挿入対象動画領域の情報と黒挿入期間リミッタ部８８から出力された黒挿入期間の両方に基づいて、黒挿入位相信号Ｓｂ５、Ｓｂ６を生成し、ＰＷＭパルス発生部８６に出力する。 The PWM control unit 85 outputs the black insertion phase signals Sb5 and Sb6 based on both the information on the black insertion target moving image area output from the moving image priority determination unit 84 and the black insertion period output from the black insertion period limiter unit 88. Generated and output to the PWM pulse generator 86.
　ＰＷＭパルス発生部８６は、ＰＷＭ制御部８５から出力された黒挿入位相信号Ｓｂ５、Ｓｂ６に基づいて光源５、光源６の点灯および消灯を制御する。ＰＷＭパルス発生部８６は、黒挿入位相信号Ｓｂ５、Ｓｂ６で示される黒挿入期間が所定の黒挿入期間Ｔを超えている場合には、光源５、６に対する駆動波形の波高値を所定の波高値Ｈより高い波高値ＨＡ、ＨＢに変更したＰＷＭパルスＰ５、Ｐ６を出力する。 The PWM pulse generator 86 controls the light source 5 and the light source 6 to be turned on and off based on the black insertion phase signals Sb5 and Sb6 output from the PWM controller 85. When the black insertion period indicated by the black insertion phase signals Sb5 and Sb6 exceeds the predetermined black insertion period T, the PWM pulse generator 86 sets the peak value of the drive waveform for the light sources 5 and 6 to a predetermined peak value. PWM pulses P5 and P6 changed to peak values HA and HB higher than H are output.
　図１１に示すように、物体Ｍ８は、重複照明表示領域４３内を移動中に大きさが大きくなっている。このため、所定の黒挿入期間Ｔだけ黒挿入を行っただけでは、動画ボヤケを抑制することができない。そのため、実施の形態２では、物体Ｍ８の大きさに合わせて黒挿入期間Ｔ０（＞Ｔ）に延長する。 As shown in FIG. 11, the size of the object M8 increases while moving in the overlapping illumination display area 43. For this reason, moving image blur cannot be suppressed only by performing black insertion for a predetermined black insertion period T. Therefore, in the second embodiment, the black insertion period T0 (> T) is extended in accordance with the size of the object M8.
　しかし、単純に黒挿入期間を延長すると輝度が低下する。すなわち、光源輝度設定部８１により設定された輝度に基づく消灯期間よりも黒挿入期間が長くなると、設定された輝度より低くなってしまう。そのため、ＰＷＭ制御部８５およびＰＷＭパルス発生部８６は、光源５、６に対する駆動波形の波高値（電流値）を所定の波高値Ｈより高い波高値ＨＡ、ＨＢに変更する。これによって、光源５，６の輝度の低下を抑制する。なお、波高値を高くすることによる輝度向上には物理的に限界があるため、黒挿入期間Ｔ０としては、重複照明表示領域４３に相当する期間を最大としても良い。 However, if the black insertion period is simply extended, the luminance decreases. That is, when the black insertion period becomes longer than the extinguishing period based on the luminance set by the light source luminance setting unit 81, the luminance becomes lower than the set luminance. Therefore, the PWM control unit 85 and the PWM pulse generation unit 86 change the crest values (current values) of the drive waveforms for the light sources 5 and 6 to crest values HA and HB higher than the predetermined crest value H. This suppresses a decrease in luminance of the light sources 5 and 6. It should be noted that since there is a physical limit to the luminance improvement by increasing the peak value, the period corresponding to the overlapping illumination display area 43 may be maximized as the black insertion period T0.
　このように、実施の形態２によれば、黒挿入期間Ｔを黒挿入期間Ｔ０に延長することと光源５，６の駆動波形の波高値Ｈを波高値ＨＡ、ＨＢに高くすることで、移動中に物体Ｍ８が大きくなる場合でも、複数の光源５，６からの重複した照明によるクロストークの発生を防止し、動画ボヤケも輝度の低下もない高品質な画像表示を実現することができる。 As described above, according to the second embodiment, the black insertion period T is extended to the black insertion period T0, and the peak values H of the drive waveforms of the light sources 5 and 6 are increased to the peak values HA and HB. Even when the object M8 becomes large in the middle, it is possible to prevent occurrence of crosstalk due to overlapping illumination from the plurality of light sources 5 and 6, and to realize a high-quality image display without moving image blur and luminance reduction.
　なお、本実施の形態２においては、大きさが大きくなりながら右方向に移動する物体Ｍ８に対する光源５、６の黒挿入期間と駆動波形の制御について説明した。しかし、本実施の形態２における光源５、６の黒挿入期間と駆動波形の制御は、大きさが大きくなりながら移動する物体に限られない。例えば、図３、図４ａ～４ｃ、図５、図６、図７ａ～７ｃ、図８の物体Ｍ１～Ｍ３、Ｍ６、Ｍ７に対しても適用可能である。例えば図３において、物体Ｍ１を含む動画領域Ｇ１に対する画像データの書込み期間に対応する黒挿入期間Ｔが、光源輝度設定部８１により設定された輝度に基づく消灯期間より長い場合には、ＰＷＭ制御部８５およびＰＷＭパルス発生部８６は、光源５、６に対する駆動波形の波高値（電流値）を、所定の波高値より高い波高値に変更するようにしてもよい。 In the second embodiment, the black insertion period of the light sources 5 and 6 and the control of the drive waveform for the object M8 that moves in the right direction while increasing in size have been described. However, the black insertion period and the drive waveform control of the light sources 5 and 6 in the second embodiment are not limited to an object that moves while increasing in size. For example, the present invention can also be applied to the objects M1 to M3, M6, and M7 in FIGS. 3, 4a to 4c, FIGS. 5, 6, 7a to 7c, and FIG. For example, in FIG. 3, when the black insertion period T corresponding to the image data writing period for the moving image area G1 including the object M1 is longer than the extinguishing period based on the luminance set by the light source luminance setting unit 81, the PWM control unit 85 and the PWM pulse generator 86 may change the peak value (current value) of the drive waveform for the light sources 5 and 6 to a peak value higher than a predetermined peak value.
　本発明の上記実施の形態１、２では、ＬＥＤが表示部２の液晶表示パネル４の上下両端部に配置されたＬＥＤエッジ型のバックライト方式について説明してきたが、光源の種類や配置はこれに限らない。例えば、図１２ａに示すように、液晶表示パネル４の背面にＬＥＤ５１１、５１２、・・・、５１ｎ、・・・、５ｍ１、・・・、５ｍｎをマトリクス状に配置するＬＥＤ直下型のバックライト方式であってもよい。また、図１２ｂに示すように蛍光管などのランプ６１１、６１２、・・・、６１ｎを所定間隔で配置するランプ直下型のバックライト方式であっても良い。 In the first and second embodiments of the present invention, the LED edge type backlight system in which the LEDs are arranged at the upper and lower end portions of the liquid crystal display panel 4 of the display unit 2 has been described. Not limited to. For example, as shown in FIG. 12a, an LED direct-type backlight system in which LEDs 511, 512,..., 51n,..., 5m1,. It may be. Further, as shown in FIG. 12b, a backlight type directly under the lamp in which lamps 611, 612,..., 61n such as fluorescent tubes are arranged at a predetermined interval may be used.
　また、本発明の実施の形態１、２では、光源として２個の光源５、６を備えた形態について説明したが、これに限られるものではない。例えば、光源としてＮ個（Ｎは２以上の整数）備える形態でも良い。この場合は、表示領域を、第ｋ光源（ｋは１～（Ｎ－１）の整数）および第（ｋ＋１）光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域と、主に第ｋ光源により照明される第ｋ表示領域と、主に第（ｋ＋１）光源により照明される第（ｋ＋１）表示領域とに分割すればよい。そして、光源制御部８は、第１光源～第Ｎ光源の点灯および消灯を制御する。また、光源制御部８は、動画領域が重複照明表示領域に含まれる場合には、動画領域の走査期間中（つまり表示制御部９による動画領域に対する画像データの書込み期間中）は第ｋ光源および第（ｋ＋１）光源を同時に消灯することで、本発明の効果を奏することができる。 Further, in Embodiments 1 and 2 of the present invention, the description has been given of an embodiment in which two light sources 5 and 6 are provided as light sources, but the present invention is not limited to this. For example, N light sources (N is an integer of 2 or more) may be provided as light sources. In this case, the display area is an overlapping illumination display area that is illuminated by a k-th light source (k is an integer from 1 to (N−1)) and a (k + 1) light source with a light amount of a predetermined level or more. What is necessary is just to divide | segment into the kth display area mainly illuminated by the kth light source, and the (k + 1) th display area mainly illuminated by the (k + 1) th light source. The light source control unit 8 controls turning on and off of the first light source to the Nth light source. Further, when the moving image area is included in the overlapping illumination display area, the light source control unit 8 performs the k-th light source and the k-th light source during the scanning period of the moving image area (that is, during the image data writing period for the moving image area by the display control unit 9). The effect of the present invention can be achieved by simultaneously turning off the (k + 1) th light source.
　なお、上記実施の形態１、２では、動画が水平方向に移動する例について説明しているが、これに限られない。例えば、動画が垂直方向に移動する場合や、動画が斜め方向に移動する場合でも、上記実施の形態１、２と同様に光源５、６を制御してもよい。なお、動画が水平方向に移動する場合には、１フレーム期間における光源５、６の消灯期間が連続する複数フレームにわたって移動しない。したがって、上記実施の形態１、２による光源５、６の点灯および消灯制御による効果を好適に発揮することができる。また、ＰＷＭ制御部８５は、光源５、６の点灯および消灯制御を容易に行うことができる。 In the first and second embodiments, the example in which the moving image moves in the horizontal direction has been described. However, the present invention is not limited to this. For example, the light sources 5 and 6 may be controlled in the same manner as in the first and second embodiments even when the moving image moves in the vertical direction or when the moving image moves in the oblique direction. Note that when the moving image moves in the horizontal direction, the light sources 5 and 6 in the one-frame period do not move over a plurality of consecutive frames. Therefore, it is possible to preferably exert the effect of the lighting and extinguishing control of the light sources 5 and 6 according to the first and second embodiments. Further, the PWM control unit 85 can easily perform turning on / off control of the light sources 5 and 6.
　また、上記実施の形態１、２では，例えば図４ｂ、図４ｃに示されるように、動画領域が重複照明表示領域４３に重ならない場合には、光源制御部８は、通常のブリンキングを行っている。例えば図４ｂと図４ｃとが合成されたような場合、すなわち一方の動画領域が第１照明表示領域４１に含まれ、他方の動画領域が第２照明表示領域４２に含まれる場合には、光源制御部８は、図１４ａに示されるダブルブリンキングを行えばよい。そして、動画領域が重複照明表示領域４３に重なると、光源制御部８は、上記実施の形態１、２で説明されたような光源５、６の制御を行っている。ここで、ブリンキングとは、動画領域に合わせて光源の消灯期間を変える動作を言う。 In the first and second embodiments, as shown in FIGS. 4b and 4c, for example, when the moving image area does not overlap the overlapping illumination display area 43, the light source control unit 8 performs normal blinking. ing. For example, when FIG. 4 b and FIG. 4 c are combined, that is, when one moving image area is included in the first illumination display area 41 and the other moving image area is included in the second illumination display area 42, The control unit 8 may perform double blinking shown in FIG. 14a. When the moving image area overlaps the overlapping illumination display area 43, the light source control unit 8 controls the light sources 5 and 6 as described in the first and second embodiments. Here, blinking refers to an operation of changing the light extinction period of the light source in accordance with the moving image area.
　しかし、動画領域が重複照明表示領域４３に重ならない場合には、光源制御部８は、ブリンキングを行わずに、バックライトスキャンにより光源５、６を制御するようにしてもよい。ここで、バックライトスキャンとは、動画領域の位置に関係なく光源の消灯開始位置が固定されている動作を言う。つまり、バックライトスキャンでは、光源輝度設定部８１により設定される輝度が変化しない場合には、１フレーム期間における光源の点灯期間および消灯期間が固定されることになる。バックライトスキャンでは、光源制御部８は、例えば、表示制御部９による表示領域４０の上部に対する画像データの書込み期間中は、光源５を消灯し、表示制御部９による表示領域４０の下部に対する画像データの書込み期間中は、光源６を消灯すればよい。そして、動画領域が重複照明表示領域４３に重なると、光源制御部８は、上記実施の形態１、２で説明されたような光源５、６の制御を行うようにすればよい。この形態によれば、動画領域が重複照明表示領域４３に重ならないときはバックライトスキャンを行っているため、光源制御部８は、光源５、６の制御を簡単化することができる。 However, when the moving image area does not overlap the overlapping illumination display area 43, the light source control unit 8 may control the light sources 5 and 6 by backlight scanning without performing blinking. Here, backlight scanning refers to an operation in which the light source start-off position is fixed regardless of the position of the moving image area. That is, in the backlight scan, when the luminance set by the light source luminance setting unit 81 does not change, the lighting period and the extinguishing period of the light source in one frame period are fixed. In the backlight scan, the light source control unit 8 turns off the light source 5 and writes an image on the lower part of the display region 40 by the display control unit 9 during the writing period of the image data on the upper part of the display region 40 by the display control unit 9. The light source 6 may be turned off during the data writing period. When the moving image area overlaps the overlapping illumination display area 43, the light source control unit 8 may control the light sources 5 and 6 as described in the first and second embodiments. According to this embodiment, since the backlight scan is performed when the moving image area does not overlap the overlapping illumination display area 43, the light source control unit 8 can simplify the control of the light sources 5 and 6.
　なお、上述した具体的実施形態には以下の構成を有する発明が主に含まれている。 The specific embodiments described above mainly include inventions having the following configurations.
　本発明の一局面に係る画像表示装置は、入力された映像信号に対応する画像を表示する表示領域を有する表示パネルと、前記映像信号に基づく画像データを前記表示領域に対して書き込む表示制御部と、前記表示パネルの前記表示領域を照明する第１光源および第２光源と、前記第１光源および前記第２光源の点灯および消灯を制御する光源制御部と、を備え、前記表示領域は、前記第１光源および前記第２光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域を有し、前記光源制御部は、前記映像信号に基づき前記表示パネルの前記表示領域内の動画を含む動画領域を抽出し、抽出された前記動画領域の前記表示領域における存在領域を判定し、前記動画領域が前記重複照明表示領域に含まれると判定した場合には、前記表示制御部による前記動画領域に対する前記画像データの書込み期間中は、前記第１光源および前記第２光源を消灯する。 An image display device according to an aspect of the present invention includes a display panel having a display area that displays an image corresponding to an input video signal, and a display control unit that writes image data based on the video signal to the display area. A first light source and a second light source that illuminate the display area of the display panel, and a light source controller that controls turning on and off of the first light source and the second light source, and the display area includes: The first light source and the second light source each have an overlapping illumination display area that is illuminated with an amount of light of a predetermined level or more, and the light source control unit is located in the display area of the display panel based on the video signal. When the moving image area including the moving image is extracted, the existence area in the display area of the extracted moving image area is determined, and the moving image area is determined to be included in the overlapping illumination display area The, during the write period of the image data for the moving picture area by said display control unit turns off the first light source and the second light source.
　この構成によれば、表示パネルは、入力された映像信号に対応する画像を表示する表示領域を有する。表示制御部は、映像信号に基づく画像データを表示領域に対して書き込む。第１光源および第２光源は、表示パネルの表示領域を照明する。光源制御部は、第１光源および第２光源の点灯および消灯を制御する。表示領域は、第１光源および第２光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域を有する。光源制御部は、映像信号に基づき表示パネルの表示領域内の動画を含む動画領域を抽出する。光源制御部は、抽出された動画領域の表示領域における存在領域を判定する。光源制御部は、動画領域が重複照明表示領域に含まれると判定した場合には、表示制御部による動画領域に対する画像データの書込み期間中は、第１光源および第２光源を消灯する。重複照明表示領域に含まれる動画領域は、第１光源および第２光源が点灯している場合、第１光源および第２光源により所定レベル以上の光量で重複して照明される。したがって、重複照明表示領域に含まれる動画領域に対する画像データの書込み期間中は、第１光源および第２光源を消灯することによって、第１光源および第２光源の重複する照明によるクロストークの発生を軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, the display panel has a display area for displaying an image corresponding to the input video signal. The display control unit writes image data based on the video signal to the display area. The first light source and the second light source illuminate the display area of the display panel. The light source control unit controls turning on and off of the first light source and the second light source. The display area has an overlapping illumination display area that is illuminated by the first light source and the second light source with a light amount of a predetermined level or more. The light source control unit extracts a moving image area including a moving image in the display area of the display panel based on the video signal. The light source control unit determines an existing area in the display area of the extracted moving image area. When it is determined that the moving image area is included in the overlapping illumination display area, the light source control unit turns off the first light source and the second light source during the writing period of the image data for the moving image area by the display control unit. When the first light source and the second light source are turned on, the moving image area included in the overlapping illumination display area is illuminated by the first light source and the second light source with a light amount of a predetermined level or more. Therefore, during the writing period of the image data for the moving image area included in the overlapping illumination display area, the first light source and the second light source are turned off, thereby generating crosstalk due to the overlapping illumination of the first light source and the second light source. It is possible to realize high-quality image display that reduces and suppresses blurring of moving images.
　また、上記の画像表示装置において、前記表示領域は、前記第１光源側において前記重複照明表示領域と隣接する第１照明表示領域をさらに有し、前記光源制御部は、前記動画領域が前記第１照明表示領域及び前記重複照明表示領域に跨って存在すると判定した場合に、前記動画領域と前記第１照明表示領域とが重なる領域を第１重畳領域とし、前記動画領域と前記重複照明表示領域とが重なる領域を第２重畳領域とする時、前記第１重畳領域の大きさと前記第２重畳領域の大きさとを比較し、該比較結果に基づき、前記第１光源および前記第２光源の点灯および消灯を制御することが好ましい。 In the image display device, the display area further includes a first illumination display area adjacent to the overlapped illumination display area on the first light source side, and the light source control unit is configured such that the moving image area is the first illumination area. When it determines with existing over 1 illumination display area and the said overlap illumination display area, the area | region where the said moving image area and the said 1st illumination display area overlap is made into a 1st overlap area, The said animation area and the said overlap illumination display area Is the second overlapping area, the size of the first overlapping area is compared with the size of the second overlapping area, and the lighting of the first light source and the second light source is performed based on the comparison result. It is preferable to control the turn-off and turn-off.
　この構成によれば、表示領域は、第１光源側において重複照明表示領域と隣接する第１照明表示領域をさらに有する。第１照明表示領域が第１光源側で重複照明表示領域と隣接するため、第１照明表示領域は、第２光源による照明より大きい光量で第１光源により照明されることとなる。光源制御部は、動画領域が第１照明表示領域及び重複照明表示領域に跨って存在すると判定した場合に、動画領域と第１照明表示領域とが重なる領域を第１重畳領域とし、動画領域と重複照明表示領域とが重なる領域を第２重畳領域とする時、第１重畳領域の大きさと第２重畳領域の大きさとを比較する。光源制御部は、該比較結果に基づき、第１光源および第２光源の点灯および消灯を制御する。したがって、動画領域が第１照明表示領域および重複照明表示領域の両方と重なる場合に、第１重畳領域の大きさと第２重畳領域の大きさとの比較結果に基づき、第１光源および第２光源の点灯および消灯を適切に制御することができる。 According to this configuration, the display area further includes the first illumination display area adjacent to the overlapping illumination display area on the first light source side. Since the first illumination display area is adjacent to the overlapping illumination display area on the first light source side, the first illumination display area is illuminated by the first light source with a larger light quantity than the illumination by the second light source. When the light source control unit determines that the moving image area exists across the first illumination display area and the overlapping illumination display area, the light source control unit sets the area where the moving image area and the first illumination display area overlap as a first overlapping area, When the area where the overlapping illumination display area overlaps is set as the second overlapping area, the size of the first overlapping area is compared with the size of the second overlapping area. The light source control unit controls turning on and off of the first light source and the second light source based on the comparison result. Therefore, when the moving image area overlaps both the first illumination display area and the overlapping illumination display area, the first light source and the second light source are compared based on the comparison result between the size of the first overlap area and the size of the second overlap area. It is possible to appropriately control turning on and off.
　また、上記の画像表示装置において、前記光源制御部は、前記第２重畳領域の大きさが前記第１重畳領域の大きさ以上の場合には、前記表示制御部による前記第２重畳領域に対する前記画像データの書込み期間中は、前記第１光源および前記第２光源を消灯し、前記第２重畳領域の大きさが前記第１重畳領域の大きさより小さい場合には、前記表示制御部による前記第１重畳領域に対する前記画像データの書込み期間中は、前記第１光源を消灯することが好ましい。 In the above image display device, the light source control unit may be configured to apply the display control unit to the second overlapping area when the size of the second overlapping area is equal to or larger than the first overlapping area. During the writing period of the image data, the first light source and the second light source are turned off, and when the size of the second overlapping region is smaller than the size of the first overlapping region, the display control unit executes the first light source. It is preferable that the first light source is turned off during the writing period of the image data for one overlapping region.
　この構成によれば、光源制御部は、第２重畳領域の大きさが第１重畳領域の大きさ以上の場合には、表示制御部による動画領域に対する画像データの書込み期間中は、第１光源および第２光源を消灯する。光源制御部は、第２重畳領域の大きさが第１重畳領域の大きさより小さい場合には、表示制御部による第１重畳領域に対する画像データの書込み期間中は、第１光源を消灯する。したがって、動画領域が第１照明表示領域および重複照明表示領域の両方と重なる場合に、第１重畳領域と第２重畳領域との大小関係に応じて、第１光源および第２光源の照明によるクロストークの発生を適切に軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, when the size of the second overlapping region is equal to or larger than the size of the first overlapping region, the light source control unit is configured to output the first light source during the writing period of the image data to the moving image region by the display control unit. The second light source is turned off. When the size of the second overlapping area is smaller than the size of the first overlapping area, the light source control unit turns off the first light source during the writing period of the image data to the first overlapping area by the display control unit. Therefore, when the moving image area overlaps both the first illumination display area and the overlapping illumination display area, the crossing due to the illumination of the first light source and the second light source depends on the magnitude relationship between the first overlap area and the second overlap area. It is possible to realize a high-quality image display that appropriately reduces the occurrence of talk and suppresses moving image blur.
　また、上記の画像表示装置において、前記表示領域は、前記第１光源側において前記重複照明表示領域と隣接する第１照明表示領域をさらに有し、前記光源制御部は、第１動画および第２動画を検出し、前記動画領域として、前記第１動画を含む第１動画領域および前記第２動画を含む第２動画領域を抽出する動画領域抽出部と、前記動画領域抽出部により抽出された前記第１動画領域および前記第２動画領域の特性をそれぞれ検出し、該検出結果に基づき前記第１動画の優先度である第１優先度と前記第２動画の優先度である第２優先度とを判定する動画優先度判定部と、を含み、前記光源制御部は、前記第１動画領域が前記重複照明表示領域に含まれ、且つ前記第２動画領域が前記第１照明表示領域に含まれると判定した場合において、前記動画優先度判定部により判定された前記第１優先度が前記第２優先度以上の場合には、前記表示制御部による前記第１動画領域に対する前記画像データの書込み期間中は、前記第１光源および前記第２光源を消灯する一方、前記第１優先度が前記第２優先度より低い場合には、前記表示制御部による前記第１動画領域に対する前記画像データの書込み期間中は、前記第２光源を消灯し、前記表示制御部による前記第２動画領域に対する前記画像データの書込み期間中は、前記第１光源を消灯することが好ましい。 In the image display device, the display area further includes a first illumination display area adjacent to the overlapped illumination display area on the first light source side, and the light source control unit includes the first moving image and the second animation display area. A moving image region extracting unit that detects a moving image and extracts a first moving image region including the first moving image and a second moving image region including the second moving image as the moving image region, and the moving image region extracting unit extracts the moving image region A characteristic of each of the first moving image area and the second moving image area is detected, and based on the detection result, a first priority that is a priority of the first moving image and a second priority that is a priority of the second moving image; And the light source controller includes the first moving image area included in the overlapping illumination display area and the second moving image area included in the first illumination display area. In the case of When the first priority determined by the moving image priority determination unit is equal to or higher than the second priority, the first control unit is configured to write the first data during the writing period of the image data to the first moving image area by the display control unit. When the light source and the second light source are turned off, and the first priority is lower than the second priority, the display control unit performs the first writing of the image data on the first moving image area. It is preferable that the two light sources are turned off and the first light source is turned off during the writing period of the image data for the second moving image area by the display control unit.
　この構成によれば、表示領域は、第１光源側において重複照明表示領域と隣接する第１照明表示領域をさらに有する。第１照明表示領域が第１光源側で重複照明表示領域と隣接するため、第１照明表示領域は、第２光源による照明より大きい光量で第１光源により照明されることとなる。光源制御部は、動画領域抽出部と、動画優先度判定部と、を含む。動画領域抽出部は、第１動画および第２動画を検出し、動画領域として、第１動画を含む第１動画領域および第２動画を含む第２動画領域を抽出する。動画優先度判定部は、動画領域抽出部により抽出された第１動画領域および第２動画領域の特性をそれぞれ検出し、該検出結果に基づき第１動画の優先度である第１優先度と第２動画の優先度である第２優先度とを判定する。光源制御部は、第１動画領域が重複照明表示領域に含まれ、且つ第２動画領域が第１照明表示領域に含まれると判定した場合において、動画優先度判定部により判定された第１優先度が第２優先度以上の場合には、表示制御部による第１動画領域に対する画像データの書込み期間中は、第１光源および第２光源を消灯する。これによって、重複照明表示領域に含まれる第１動画の第１優先度が第２優先度以上の場合に、第１光源および第２光源を消灯することで、重複照明表示領域に含まれる第１動画領域における第１光源および第２光源の重複した照明によるクロストークの発生を軽減し、動画ボヤケを抑制することができる。一方、光源制御部は、第１優先度が第２優先度より低い場合には、表示制御部による第１動画領域に対する画像データの書込み期間中は、第２光源を消灯し、表示制御部による第２動画領域に対する画像データの書込み期間中は、第１光源を消灯する。これによって、第１優先度が第１照明表示領域に含まれる第２動画の第２優先度より低い場合に、第１動画領域に対する書込み期間中は第２光源を消灯し、第２動画領域に対する書込み期間中は第１光源を消灯することで、第１動画領域および第２動画領域におけるクロストークの発生をそれぞれ軽減し、動画ボヤケを抑制することができる。したがって、動画領域の特性に基づき判定された２つの動画の優先度が異なる場合に、その優先度の高低関係に応じて、第１光源および第２光源の照明によるクロストークの発生を適切に軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, the display area further includes the first illumination display area adjacent to the overlapping illumination display area on the first light source side. Since the first illumination display area is adjacent to the overlapping illumination display area on the first light source side, the first illumination display area is illuminated by the first light source with a larger light quantity than the illumination by the second light source. The light source control unit includes a moving image region extraction unit and a moving image priority determination unit. The moving image region extraction unit detects the first moving image and the second moving image, and extracts the first moving image region including the first moving image and the second moving image region including the second moving image as moving image regions. The moving image priority determination unit detects the characteristics of the first moving image region and the second moving image region extracted by the moving image region extraction unit, and based on the detection result, the first priority and the first priority that are the priorities of the first moving image. The second priority that is the priority of the two moving images is determined. When the light source control unit determines that the first moving image area is included in the overlapping illumination display area and the second moving image area is included in the first illumination display area, the first priority determined by the moving image priority determination unit When the degree is equal to or higher than the second priority, the first light source and the second light source are turned off during the writing period of the image data for the first moving image area by the display control unit. Accordingly, when the first priority of the first moving image included in the overlapping illumination display area is equal to or higher than the second priority, the first light source and the second light source are turned off, thereby the first included in the overlapping illumination display area. Generation of crosstalk due to overlapping illumination of the first light source and the second light source in the moving image area can be reduced, and moving image blur can be suppressed. On the other hand, when the first priority is lower than the second priority, the light source control unit turns off the second light source during the writing period of the image data to the first moving image area by the display control unit, and the display control unit During the writing period of the image data for the second moving image area, the first light source is turned off. Accordingly, when the first priority is lower than the second priority of the second moving image included in the first illumination display region, the second light source is turned off during the writing period for the first moving image region, and the second moving image region is By turning off the first light source during the writing period, it is possible to reduce the occurrence of crosstalk in the first moving image area and the second moving image area, and to suppress moving image blur. Accordingly, when the priorities of two moving images determined based on the characteristics of the moving image region are different, the occurrence of crosstalk due to illumination of the first light source and the second light source is appropriately reduced according to the priority level relationship. In addition, it is possible to realize high-quality image display in which moving image blur is suppressed.
　また、上記の画像表示装置において、前記動画優先度判定部は、前記特性が動画の輝度の場合には、前記第１動画の輝度と前記第２動画の輝度とを検出し、前記第１動画の前記輝度が前記第２動画の前記輝度以上のときは前記第１優先度が前記第２優先度以上と判定し、前記第１動画の前記輝度が前記第２動画の前記輝度より低いときは前記第１優先度が前記第２優先度より低いと判定することが好ましい。 In the image display device, the moving image priority determination unit detects the luminance of the first moving image and the luminance of the second moving image when the characteristic is the luminance of the moving image, and the first moving image When the luminance of the second moving image is equal to or higher than the luminance of the second moving image, the first priority is determined to be equal to or higher than the second priority, and when the luminance of the first moving image is lower than the luminance of the second moving image. It is preferable to determine that the first priority is lower than the second priority.
　この構成によれば、動画優先度判定部は、特性が動画の輝度の場合には、第１動画の輝度と第２動画の輝度とを検出し、第１動画の輝度が第２動画の輝度以上のときは第１優先度が第２優先度以上と判定し、第１動画の輝度が第２動画の輝度より低いときは第１優先度が第２優先度より低いと判定する。したがって、第１動画および第２動画の輝度を検出し、輝度に基づき優先度を判定することで、第１光源および第２光源の照明によるクロストークの発生を適切に軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, when the characteristic is the luminance of the moving image, the moving image priority determination unit detects the luminance of the first moving image and the luminance of the second moving image, and the luminance of the first moving image is the luminance of the second moving image. In the above case, the first priority is determined to be equal to or higher than the second priority, and when the luminance of the first moving image is lower than the luminance of the second moving image, the first priority is determined to be lower than the second priority. Therefore, by detecting the luminance of the first moving image and the second moving image and determining the priority based on the luminance, the occurrence of crosstalk due to illumination of the first light source and the second light source is appropriately reduced, and moving image blur is suppressed. High-quality image display can be realized.
　また、上記の画像表示装置において、前記動画優先度判定部は、前記特性が動画の移動速度の場合には、前記第１動画の移動速度と前記第２動画の移動速度とを検出し、前記第１動画の前記移動速度が前記第２動画の前記移動速度以上のときは前記第１優先度が前記第２優先度以上と判定し、前記第１動画の前記移動速度が前記第２動画の前記移動速度より遅いときは前記第１優先度が前記第２優先度より低いと判定することが好ましい。 In the image display device, the moving image priority determination unit detects the moving speed of the first moving image and the moving speed of the second moving image when the characteristic is a moving speed of the moving image. When the moving speed of the first moving image is equal to or higher than the moving speed of the second moving image, it is determined that the first priority is equal to or higher than the second priority, and the moving speed of the first moving image is equal to that of the second moving image. It is preferable to determine that the first priority is lower than the second priority when it is slower than the moving speed.
　この構成によれば、動画優先度判定部は、特性が動画の移動速度の場合には、第１動画の移動速度と第２動画の移動速度とを検出し、第１動画の移動速度が第２動画の移動速度以上のときは第１優先度が第２優先度以上と判定し、第１動画の移動速度が第２動画の移動速度より遅いときは第１優先度が第２優先度より低いと判定する。したがって、第１動画および第２動画の移動速度を検出し、移動速度に基づき優先度を判定することで、第１光源および第２光源の照明によるクロストークの発生を適切に軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, when the characteristic is the moving speed of the moving image, the moving image priority determination unit detects the moving speed of the first moving image and the moving speed of the second moving image, and the moving speed of the first moving image is the first moving speed. When the moving speed of the second moving image is equal to or higher than the moving speed of the second moving image, the first priority is determined to be higher than the second priority. When the moving speed of the first moving image is slower than the moving speed of the second moving image, the first priority is higher than the second priority. Judge as low. Therefore, by detecting the moving speed of the first moving image and the second moving image and determining the priority based on the moving speed, occurrence of crosstalk due to illumination of the first light source and the second light source is appropriately reduced, and moving image blurring is performed. It is possible to realize a high-quality image display that suppresses the above.
　また、上記の画像表示装置において、前記動画優先度判定部は、前記特性が動画領域における高周波成分量の場合には、前記第１動画領域における高周波成分量と前記第２動画領域における高周波成分量とを検出し、前記第１動画領域における前記高周波成分量が前記第２動画領域における前記高周波成分量以上のときは前記第１優先度が前記第２優先度以上と判定し、前記第１動画領域における前記高周波成分量が前記第２動画領域における前記高周波成分量より少ないときは前記第１優先度が前記第２優先度より低いと判定することが好ましい。 In the above image display device, the moving image priority determination unit may be configured such that, when the characteristic is a high frequency component amount in the moving image region, a high frequency component amount in the first moving image region and a high frequency component amount in the second moving image region. And when the high-frequency component amount in the first moving image region is equal to or greater than the high-frequency component amount in the second moving image region, the first priority is determined to be greater than or equal to the second priority. When the high-frequency component amount in the region is smaller than the high-frequency component amount in the second moving image region, it is preferable to determine that the first priority is lower than the second priority.
　この構成によれば、動画優先度判定部は、特性が動画領域における高周波成分量の場合には、第１動画領域における高周波成分量と第２動画領域における高周波成分量とを検出し、第１動画領域における高周波成分量が第２動画領域における高周波成分量以上のときは第１優先度が第２優先度以上と判定し、第１動画領域における高周波成分量が第２動画領域における高周波成分量より少ないときは第１優先度が第２優先度より低いと判定する。したがって、第１動画領域および第２動画領域における高周波成分量を検出し、高周波成分量に基づき優先度を判定することで、第１光源および第２光源の照明によるクロストークの発生を適切に軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, when the characteristic is the high-frequency component amount in the moving image region, the moving image priority determination unit detects the high-frequency component amount in the first moving image region and the high-frequency component amount in the second moving image region. When the high frequency component amount in the moving image region is equal to or higher than the high frequency component amount in the second moving image region, the first priority is determined to be equal to or higher than the second priority, and the high frequency component amount in the first moving image region is the high frequency component amount in the second moving image region. When it is less, it is determined that the first priority is lower than the second priority. Therefore, by detecting the amount of high frequency components in the first moving image region and the second moving image region and determining the priority based on the amount of high frequency components, occurrence of crosstalk due to illumination of the first light source and the second light source is appropriately reduced. In addition, it is possible to realize high-quality image display in which moving image blur is suppressed.
　また、上記の画像表示装置において、前記光源制御部は、前記表示制御部による前記画像データの書込み期間中に前記第１光源を消灯するときに、前記画像データの書込み期間が前記第１光源に対して予め設定された消灯期間を超える場合には、前記画像データの書込み期間以外の期間は、輝度を増加させて前記第１光源を点灯させ、前記光源制御部は、前記表示制御部による前記画像データの書込み期間中に前記第２光源を消灯するときに、前記画像データの書込み期間が前記第２光源に対して予め設定された消灯期間を超える場合には、前記画像データの書込み期間以外の期間は、輝度を増加させて前記第２光源を点灯させることが好ましい。 In the above image display device, when the light source control unit turns off the first light source during the image data writing period by the display control unit, the image data writing period is set to the first light source. On the other hand, when it exceeds a preset extinction period, the first light source is turned on by increasing the luminance during a period other than the writing period of the image data, and the light source control unit is controlled by the display control unit. When the second light source is turned off during the image data writing period, if the image data writing period exceeds a preset turn-off period for the second light source, other than the image data writing period During this period, it is preferable to turn on the second light source by increasing the luminance.
　この構成によれば、光源制御部は、表示制御部による画像データの書込み期間中に第１光源を消灯するときに、画像データの書込み期間が第１光源に対して予め設定された消灯期間を超える場合には、画像データの書込み期間以外の期間は、輝度を増加させて第１光源を点灯させる。光源制御部は、表示制御部による画像データの書込み期間中に第２光源を消灯するときに、画像データの書込み期間が第２光源に対して予め設定された消灯期間を超える場合には、画像データの書込み期間以外の期間は、輝度を増加させて第２光源を点灯させる。画像データの書込み期間が、予め設定された消灯期間を超える場合に、画像データの書込み期間中は第１光源（または第２光源）を消灯し、画像データの書込み期間以外の期間は、輝度を増加させないで第１光源（または第２光源）を点灯させると、予め設定された消灯期間より長い期間だけ消灯するため、第１光源（または第２光源）による照明の光量が低下する。しかし、この構成によれば、画像データの書込み期間が長くなり、第１光源（または第２光源）の消灯期間が予め設定された消灯期間を超える場合でも、輝度を増加させて第１光源（または第２光源）を点灯させているため、表示領域に表示される画像の輝度が低下するのを抑制することができる。また、画像データの書込み期間が予め設定された消灯期間を超える場合でも、第１光源および第２光源の照明によるクロストークの発生を適切に軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, when the light source control unit turns off the first light source during the image data writing period by the display control unit, the image data writing period is set to the extinction period set in advance for the first light source. When exceeding, the brightness is increased and the first light source is turned on during the period other than the image data writing period. When the light source control unit turns off the second light source during the image data writing period by the display control unit, if the image data writing period exceeds a preset extinction period for the second light source, an image is displayed. During a period other than the data writing period, the luminance is increased and the second light source is turned on. When the image data writing period exceeds a preset extinguishing period, the first light source (or the second light source) is extinguished during the image data writing period, and the luminance is increased during the period other than the image data writing period. If the first light source (or the second light source) is turned on without increasing, the light is turned off only for a longer period than the preset extinguishing period, so that the amount of illumination by the first light source (or the second light source) decreases. However, according to this configuration, even when the writing period of the image data becomes long and the extinction period of the first light source (or the second light source) exceeds the preset extinction period, the luminance is increased and the first light source ( Alternatively, since the second light source) is turned on, it is possible to suppress a decrease in the luminance of the image displayed in the display area. In addition, even when the image data writing period exceeds a preset extinguishing period, it is possible to appropriately reduce the occurrence of crosstalk due to illumination of the first light source and the second light source, and to display a high-quality image with reduced moving image blur. Can be realized.
　本発明の他の局面に係る画像表示装置は、入力された映像信号に対応する画像を表示する表示領域を有する表示パネルと、前記映像信号に基づく画像データを前記表示領域に対して書き込む表示制御部と、前記表示パネルの前記表示領域を照明するＮ（Ｎは２以上の整数）個の第１光源～第Ｎ光源と、前記第１光源～第Ｎ光源の点灯および消灯を制御する光源制御部と、を備え、前記表示領域は、第ｋ光源（ｋは１～（Ｎ－１）の整数）および第（ｋ＋１）光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域を有し、前記光源制御部は、前記映像信号に基づき前記表示パネルの前記表示領域内の動画を含む動画領域を抽出し、抽出された前記動画領域の前記表示領域における存在領域を判定し、前記動画領域が前記重複照明表示領域に含まれると判定した場合には、前記表示制御部による前記動画領域に対する前記画像データの書込み期間中は、前記第ｋ光源および前記第（ｋ＋１）光源を消灯する。 An image display device according to another aspect of the present invention includes a display panel having a display area for displaying an image corresponding to an input video signal, and display control for writing image data based on the video signal to the display area. , N (N is an integer of 2 or more) first light source to N light source for illuminating the display area of the display panel, and light source control for controlling turning on and off of the first light source to N light source And the display area is overlapped and illuminated by the kth light source (k is an integer from 1 to (N−1)) and the (k + 1) light source, each being overlapped with a light amount of a predetermined level or more. The light source control unit extracts a moving image region including a moving image in the display region of the display panel based on the video signal, and determines an existing region in the display region of the extracted moving image region. , The video area When said duplication is determined to be included in the illumination display region, during the write period of the image data for the moving picture area by said display control unit turns off the first k light source and the (k + 1) th light source.
　この構成によれば、表示パネルは、入力された映像信号に対応する画像を表示する表示領域を有する。表示制御部は、映像信号に基づく画像データを表示領域に対して書き込む。第１光源～第Ｎ光源は、表示パネルの表示領域を照明する。光源制御部は、第１光源～第Ｎ光源の点灯および消灯を制御する。表示領域は、第ｋ光源および第（ｋ＋１）光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域を有する。光源制御部は、映像信号に基づき表示パネルの表示領域内の動画を含む動画領域を抽出し、抽出された動画領域の表示領域における存在領域を判定し、動画領域が重複照明表示領域に含まれると判定した場合には、表示制御部による動画領域に対する画像データの書込み期間中は、第ｋ光源および第（ｋ＋１）光源を消灯する。重複照明表示領域に含まれる動画領域は、第ｋ光源および第（ｋ＋１）光源が点灯している場合、第ｋ光源および第（ｋ＋１）光源により所定レベル以上の光量で重複して照明される。したがって、重複照明表示領域に含まれる動画領域に対する画像データの書込み期間中は第ｋ光源および第（ｋ＋１）光源を消灯することによって、第ｋ光源および第（ｋ＋１）光源の重複する照明によるクロストークの発生を軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, the display panel has a display area for displaying an image corresponding to the input video signal. The display control unit writes image data based on the video signal to the display area. The first to Nth light sources illuminate the display area of the display panel. The light source control unit controls turning on and off of the first light source to the Nth light source. The display area has an overlapping illumination display area that is illuminated by the kth light source and the (k + 1) th light source with a light amount of a predetermined level or more. The light source control unit extracts a moving image area including a moving image in the display area of the display panel based on the video signal, determines an existing area in the display area of the extracted moving image area, and the moving image area is included in the overlapping illumination display area Is determined, the kth light source and the (k + 1) th light source are turned off during the writing period of the image data for the moving image area by the display control unit. When the kth light source and the (k + 1) light source are turned on, the moving image area included in the overlapping illumination display area is illuminated by the kth light source and the (k + 1) light source with a light amount equal to or higher than a predetermined level. Accordingly, the crosstalk due to the overlapping illumination of the kth light source and the (k + 1) light source is performed by turning off the kth light source and the (k + 1) light source during the writing period of the image data for the moving image area included in the overlapping illumination display area. It is possible to realize high-quality image display that reduces the occurrence of blur and suppresses blurring of moving images.
　本発明のさらに他の局面に係る画像表示方法は、入力された映像信号に基づく画像データを表示パネルの表示領域に対して書き込んで前記映像信号に対応する画像を前記表示領域に表示する表示制御ステップと、前記表示パネルの前記表示領域を照明する第１光源および第２光源の点灯および消灯を制御する光源制御ステップと、を含み、前記映像信号に基づき抽出された前記表示パネルの前記表示領域内の動画を含む動画領域が、前記表示領域のうちの前記第１光源および前記第２光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域に含まれる場合には、前記表示制御ステップにおける前記動画領域に対する前記画像データの書込み期間中は、前記光源制御ステップにおいて、前記第１光源および前記第２光源を消灯する。 An image display method according to still another aspect of the present invention is a display control for writing image data based on an input video signal to a display area of a display panel and displaying an image corresponding to the video signal in the display area. And a light source control step for controlling turning on and off of the first light source and the second light source that illuminate the display area of the display panel, and the display area of the display panel extracted based on the video signal When the moving image area including the moving image is included in the overlapping illumination display area that is illuminated by the first light source and the second light source of the display area with a light amount of a predetermined level or more, respectively, During the writing period of the image data for the moving image area in the display control step, the light source control step includes the first light source and the second light source. Source to turn off the.
　この構成によれば、表示制御ステップは、入力された映像信号に基づく画像データを表示パネルの表示領域に対して書き込んで映像信号に対応する画像を表示領域に表示する。光源制御ステップは、表示パネルの表示領域を照明する第１光源および第２光源の点灯および消灯を制御する。映像信号に基づき抽出された表示パネルの表示領域内の動画を含む動画領域が、表示領域のうちの第１光源および第２光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域に含まれる場合には、表示制御ステップにおける動画領域に対する画像データの書込み期間中は、光源制御ステップにおいて、第１光源および第２光源を消灯する。重複照明表示領域に含まれる動画領域は、第１光源および第２光源が点灯している場合、第１光源および第２光源により所定レベル以上の光量で重複して照明される。したがって、重複照明表示領域に含まれる動画領域に対する画像データの書込み期間中は第１光源および第２光源を消灯することによって、第１光源および第２光源からの重複する照明によるクロストークの発生を軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to this configuration, the display control step writes the image data based on the input video signal to the display area of the display panel and displays an image corresponding to the video signal in the display area. The light source control step controls the turning on and off of the first light source and the second light source that illuminate the display area of the display panel. Overlapping illumination display in which a moving image area including a moving image in a display area of a display panel extracted based on a video signal is illuminated by a first light source and a second light source in the display area with a light amount of a predetermined level or more. If included in the region, the first light source and the second light source are turned off in the light source control step during the writing period of the image data for the moving image region in the display control step. When the first light source and the second light source are turned on, the moving image area included in the overlapping illumination display area is illuminated by the first light source and the second light source with a light amount of a predetermined level or more. Accordingly, the first light source and the second light source are turned off during the writing period of the image data for the moving image area included in the overlapping illumination display area, thereby causing crosstalk due to overlapping illumination from the first light source and the second light source. It is possible to realize high-quality image display that reduces and suppresses blurring of moving images.
　本発明の画像表示装置および画像表示方法によれば、第１および第２光源により重複して照明される重複照明表示領域に動画領域が含まれる場合には、第１光源および第２光源を動画領域に対する画像データの書込み期間中は消灯している。したがって、第１光源および第２光源からの重複する照明によるクロストークの発生を軽減し、動画ボヤケを抑制した高品質な画像表示を実現することができる。 According to the image display device and the image display method of the present invention, when the moving image area is included in the overlapping illumination display area that is illuminated by the first and second light sources, the first light source and the second light source are converted into moving images. During the period of writing image data to the area, it is turned off. Therefore, it is possible to reduce the occurrence of crosstalk due to overlapping illumination from the first light source and the second light source, and to realize a high-quality image display in which moving image blur is suppressed.
　本発明の画像表示装置および画像表示方法は、表示パネルの表示領域を照明する複数の光源を備えた画像表示装置に適用可能である。 The image display device and the image display method of the present invention can be applied to an image display device including a plurality of light sources that illuminate a display area of a display panel.

Claims (10)

  1. 　入力された映像信号に対応する画像を表示する表示領域を有する表示パネルと、
    　前記映像信号に基づく画像データを前記表示領域に対して書き込む表示制御部と、
    　前記表示パネルの前記表示領域を照明する第１光源および第２光源と、
    　前記第１光源および前記第２光源の点灯および消灯を制御する光源制御部と、
    を備え、
    　前記表示領域は、前記第１光源および前記第２光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域を有し、
    　前記光源制御部は、前記映像信号に基づき前記表示パネルの前記表示領域内の動画を含む動画領域を抽出し、抽出された前記動画領域の前記表示領域における存在領域を判定し、前記動画領域が前記重複照明表示領域に含まれると判定した場合には、前記表示制御部による前記動画領域に対する前記画像データの書込み期間中は、前記第１光源および前記第２光源を消灯する画像表示装置。     A display panel having a display area for displaying an image corresponding to the input video signal;
    A display control unit for writing image data based on the video signal to the display area;
    A first light source and a second light source that illuminate the display area of the display panel;
    A light source controller that controls turning on and off of the first light source and the second light source;
    With
    The display area includes an overlapping illumination display area that is illuminated by the first light source and the second light source with a light amount of a predetermined level or more, respectively.
    The light source control unit extracts a moving image region including a moving image in the display region of the display panel based on the video signal, determines an existing region in the display region of the extracted moving image region, and the moving image region is An image display device that turns off the first light source and the second light source during a writing period of the image data to the moving image area by the display control unit when it is determined that the image is included in the overlapping illumination display area.
  2. 　前記表示領域は、前記第１光源側において前記重複照明表示領域と隣接する第１照明表示領域をさらに有し、
    　前記光源制御部は、前記動画領域が前記第１照明表示領域及び前記重複照明表示領域に跨って存在すると判定した場合に、前記動画領域と前記第１照明表示領域とが重なる領域を第１重畳領域とし、前記動画領域と前記重複照明表示領域とが重なる領域を第２重畳領域とする時、前記第１重畳領域の大きさと前記第２重畳領域の大きさとを比較し、該比較結果に基づき、前記第１光源および前記第２光源の点灯および消灯を制御する請求項１記載の画像表示装置。     The display area further includes a first illumination display area adjacent to the overlapping illumination display area on the first light source side,
    When the light source control unit determines that the moving image area exists across the first illumination display area and the overlapped illumination display area, the light source control unit first overlaps the area where the moving image area and the first illumination display area overlap. When the area where the moving image area and the overlapping illumination display area overlap is defined as the second overlapping area, the size of the first overlapping area is compared with the size of the second overlapping area, and based on the comparison result The image display device according to claim 1, wherein lighting and extinguishing of the first light source and the second light source are controlled.
  3. 　前記光源制御部は、前記第２重畳領域の大きさが前記第１重畳領域の大きさ以上の場合には、前記表示制御部による前記第２重畳領域に対する前記画像データの書込み期間中は、前記第１光源および前記第２光源を消灯し、前記第２重畳領域の大きさが前記第１重畳領域の大きさより小さい場合には、前記表示制御部による前記第１重畳領域に対する前記画像データの書込み期間中は、前記第１光源を消灯する請求項２記載の画像表示装置。 When the size of the second superimposed region is equal to or larger than the size of the first superimposed region, the light source control unit is configured to write the image data on the second superimposed region by the display control unit during the writing period. When the first light source and the second light source are turned off and the size of the second overlapping region is smaller than the first overlapping region, the display control unit writes the image data to the first overlapping region. The image display device according to claim 2, wherein the first light source is turned off during the period.
  4. 　前記表示領域は、前記第１光源側において前記重複照明表示領域と隣接する第１照明表示領域をさらに有し、
    　前記光源制御部は、
    　第１動画および第２動画を検出し、前記動画領域として、前記第１動画を含む第１動画領域および前記第２動画を含む第２動画領域を抽出する動画領域抽出部と、
    　前記動画領域抽出部により抽出された前記第１動画領域および前記第２動画領域の特性をそれぞれ検出し、該検出結果に基づき前記第１動画の優先度である第１優先度と前記第２動画の優先度である第２優先度とを判定する動画優先度判定部と、
    を含み、
    　前記光源制御部は、前記第１動画領域が前記重複照明表示領域に含まれ、且つ前記第２動画領域が前記第１照明表示領域に含まれると判定した場合において、前記動画優先度判定部により判定された前記第１優先度が前記第２優先度以上の場合には、前記表示制御部による前記第１動画領域に対する前記画像データの書込み期間中は、前記第１光源および前記第２光源を消灯する一方、前記第１優先度が前記第２優先度より低い場合には、前記表示制御部による前記第１動画領域に対する前記画像データの書込み期間中は、前記第２光源を消灯し、前記表示制御部による前記第２動画領域に対する前記画像データの書込み期間中は、前記第１光源を消灯する請求項１記載の画像表示装置。     The display area further includes a first illumination display area adjacent to the overlapping illumination display area on the first light source side,
    The light source controller is
    A moving image region extracting unit that detects a first moving image and a second moving image, and extracts, as the moving image region, a first moving image region that includes the first moving image and a second moving image region that includes the second moving image;
    The characteristics of the first moving image area and the second moving image area extracted by the moving image area extracting unit are detected, respectively, and based on the detection result, the first priority and the second moving image that are the priorities of the first moving image. A video priority determination unit that determines a second priority that is a priority of
    Including
    In the case where the light source control unit determines that the first moving image area is included in the overlapping illumination display area and the second moving image area is included in the first illumination display area, the moving image priority determination unit When the determined first priority is equal to or higher than the second priority, the first light source and the second light source are turned on during the writing period of the image data to the first moving image area by the display control unit. On the other hand, if the first priority is lower than the second priority, the second light source is turned off during the writing period of the image data to the first moving image area by the display control unit, The image display device according to claim 1, wherein the first light source is turned off during the writing period of the image data for the second moving image area by the display control unit.
  5. 　前記動画優先度判定部は、前記特性が動画の輝度の場合には、前記第１動画の輝度と前記第２動画の輝度とを検出し、前記第１動画の前記輝度が前記第２動画の前記輝度以上のときは前記第１優先度が前記第２優先度以上と判定し、前記第１動画の前記輝度が前記第２動画の前記輝度より低いときは前記第１優先度が前記第２優先度より低いと判定する請求項４記載の画像表示装置。 The moving image priority determination unit detects the luminance of the first moving image and the luminance of the second moving image when the characteristic is the luminance of the moving image, and the luminance of the first moving image is the luminance of the second moving image. When the luminance is higher than the luminance, the first priority is determined to be higher than the second priority. When the luminance of the first moving image is lower than the luminance of the second moving image, the first priority is the second priority. The image display device according to claim 4, wherein the image display device is determined to be lower than the priority.
  6. 　前記動画優先度判定部は、前記特性が動画の移動速度の場合には、前記第１動画の移動速度と前記第２動画の移動速度とを検出し、前記第１動画の前記移動速度が前記第２動画の前記移動速度以上のときは前記第１優先度が前記第２優先度以上と判定し、前記第１動画の前記移動速度が前記第２動画の前記移動速度より遅いときは前記第１優先度が前記第２優先度より低いと判定する請求項４記載の画像表示装置。 The moving image priority determination unit detects a moving speed of the first moving image and a moving speed of the second moving image when the characteristic is a moving speed of the moving image, and the moving speed of the first moving image When the moving speed of the second moving image is equal to or higher than the moving speed, it is determined that the first priority is equal to or higher than the second priority. When the moving speed of the first moving image is slower than the moving speed of the second moving image, the first priority is determined. The image display device according to claim 4, wherein one priority is determined to be lower than the second priority.
  7. 　前記動画優先度判定部は、前記特性が動画領域における高周波成分量の場合には、前記第１動画領域における高周波成分量と前記第２動画領域における高周波成分量とを検出し、前記第１動画領域における前記高周波成分量が前記第２動画領域における前記高周波成分量以上のときは前記第１優先度が前記第２優先度以上と判定し、前記第１動画領域における前記高周波成分量が前記第２動画領域における前記高周波成分量より少ないときは前記第１優先度が前記第２優先度より低いと判定する請求項４記載の画像表示装置。 The moving image priority determination unit detects a high frequency component amount in the first moving image region and a high frequency component amount in the second moving image region when the characteristic is a high frequency component amount in the moving image region, and the first moving image When the high-frequency component amount in the region is equal to or higher than the high-frequency component amount in the second moving image region, the first priority is determined to be equal to or higher than the second priority, and the high-frequency component amount in the first moving image region is the first high-frequency component amount. The image display device according to claim 4, wherein the first priority is determined to be lower than the second priority when the amount of the high-frequency component in the two moving image regions is smaller.
  8. 　前記光源制御部は、前記表示制御部による前記画像データの書込み期間中に前記第１光源を消灯するときに、前記画像データの書込み期間が前記第１光源に対して予め設定された消灯期間を超える場合には、前記画像データの書込み期間以外の期間は、輝度を増加させて前記第１光源を点灯させ、
    　前記光源制御部は、前記表示制御部による前記画像データの書込み期間中に前記第２光源を消灯するときに、前記画像データの書込み期間が前記第２光源に対して予め設定された消灯期間を超える場合には、前記画像データの書込み期間以外の期間は、輝度を増加させて前記第２光源を点灯させる請求項１ないし７のいずれか１項に記載の画像表示装置。     When the light source control unit turns off the first light source during the writing period of the image data by the display control unit, the writing period of the image data is set to a turn-off period set in advance for the first light source. In the case of exceeding, during the period other than the writing period of the image data, the luminance is increased and the first light source is turned on,
    When the light source control unit turns off the second light source during the image data writing period by the display control unit, the image data writing period has a preset extinction period for the second light source. 8. The image display device according to claim 1, wherein when exceeding, the second light source is turned on by increasing luminance during a period other than the writing period of the image data.
  9. 　入力された映像信号に対応する画像を表示する表示領域を有する表示パネルと、
    　前記映像信号に基づく画像データを前記表示領域に対して書き込む表示制御部と、
    　前記表示パネルの前記表示領域を照明するＮ（Ｎは２以上の整数）個の第１光源～第Ｎ光源と、
    　前記第１光源～第Ｎ光源の点灯および消灯を制御する光源制御部と、
    を備え、
    　前記表示領域は、第ｋ光源（ｋは１～（Ｎ－１）の整数）および第（ｋ＋１）光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域を有し、
    　前記光源制御部は、前記映像信号に基づき前記表示パネルの前記表示領域内の動画を含む動画領域を抽出し、抽出された前記動画領域の前記表示領域における存在領域を判定し、前記動画領域が前記重複照明表示領域に含まれると判定した場合には、前記表示制御部による前記動画領域に対する前記画像データの書込み期間中は、前記第ｋ光源および前記第（ｋ＋１）光源を消灯する画像表示装置。     A display panel having a display area for displaying an image corresponding to the input video signal;
    A display control unit for writing image data based on the video signal to the display area;
    N (N is an integer of 2 or more) first light source to N light source for illuminating the display area of the display panel;
    A light source controller that controls turning on and off of the first to Nth light sources;
    With
    The display area includes an overlapping illumination display area that is illuminated by a k-th light source (k is an integer from 1 to (N−1)) and a (k + 1) light source with a light amount of a predetermined level or more.
    The light source control unit extracts a moving image region including a moving image in the display region of the display panel based on the video signal, determines an existing region in the display region of the extracted moving image region, and the moving image region is An image display device that turns off the kth light source and the (k + 1) th light source during the writing period of the image data for the moving image area by the display control unit when it is determined that it is included in the overlapping illumination display area .
  10. 　入力された映像信号に基づく画像データを表示パネルの表示領域に対して書き込んで前記映像信号に対応する画像を前記表示領域に表示する表示制御ステップと、
    　前記表示パネルの前記表示領域を照明する第１光源および第２光源の点灯および消灯を制御する光源制御ステップと、
    を含み、
    　前記映像信号に基づき抽出された前記表示パネルの前記表示領域内の動画を含む動画領域が、前記表示領域のうちの前記第１光源および前記第２光源によりそれぞれ所定レベル以上の光量で重複して照明される重複照明表示領域に含まれる場合には、前記表示制御ステップにおける前記動画領域に対する前記画像データの書込み期間中は、前記光源制御ステップにおいて、前記第１光源および前記第２光源を消灯する画像表示方法。     A display control step of writing image data based on the input video signal to the display area of the display panel and displaying an image corresponding to the video signal in the display area;
    A light source control step for controlling turning on and off of the first light source and the second light source that illuminate the display area of the display panel;
    Including
    A moving image area including a moving image in the display area of the display panel extracted based on the video signal is overlapped by a light amount of a predetermined level or more by the first light source and the second light source in the display area. When included in the overlapped illumination display area to be illuminated, the first light source and the second light source are turned off in the light source control step during the writing period of the image data to the moving image area in the display control step. Image display method.
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