WO2012147663A1 - Stereoscopic image display system - Google Patents

Stereoscopic image display system Download PDF

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Publication number
WO2012147663A1
WO2012147663A1 PCT/JP2012/060778 JP2012060778W WO2012147663A1 WO 2012147663 A1 WO2012147663 A1 WO 2012147663A1 JP 2012060778 W JP2012060778 W JP 2012060778W WO 2012147663 A1 WO2012147663 A1 WO 2012147663A1
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WO
WIPO (PCT)
Prior art keywords
eye
period
image display
shutter
backlight
Prior art date
Application number
PCT/JP2012/060778
Other languages
French (fr)
Japanese (ja)
Inventor
暎 冨吉
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012147663A1 publication Critical patent/WO2012147663A1/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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
    • G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
    • G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
    • G02B30/24—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type involving temporal multiplexing, e.g. using sequentially activated left and right shutters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
    • H04N13/341—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using temporal multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30—Image reproducers
    • H04N13/398—Synchronisation thereof; Control thereof
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0237—Switching ON and OFF the backlight within one frame
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • 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
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • 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
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects

Definitions

  • the present invention relates to a stereoscopic image display system.
  • the right-eye image and the left-eye image are sequentially displayed on the display device, and the transmission state of the right-eye liquid crystal shutter and the left-eye liquid crystal shutter is changed in synchronization with the display. Switch sequentially. Thereby, the user can appreciate a stereoscopic image by the parallax between the right eye and the left eye.
  • flicker since the transmission state of the liquid crystal shutter is sequentially switched, flicker (hereinafter referred to as flicker) may be perceived with respect to illumination light around the display device.
  • Patent Documents 1 and 2 disclose a stereoscopic video reproduction system that controls opening and closing of a liquid crystal shutter using a blanking period.
  • each liquid crystal shutter is temporarily closed even if the scanning period, which is the blanking period, is a transmission period of the right-eye and left-eye liquid crystal shutters.
  • Patent Document 3 discloses a display system provided with a blinking cycle detecting means for detecting a blinking cycle of illumination light that is external light blinking at a cycle of a commercial power supply frequency.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 64-86694 (published on March 31, 1989)” Japanese Patent Publication “JP 9-138384 A (published May 27, 1997)” International Patent Publication “WO2008 / 056753 Publication (May 15, 2008 International Publication)”
  • the present invention has been made to solve the above-described problems, and an object thereof is to prevent an increase in manufacturing cost and reliably reduce flicker without depending on the blanking period. .
  • a stereoscopic image display system of the present invention includes a liquid crystal display device that sequentially rewrites an image for a first eye and an image for a second eye to display one stereoscopic image, A first eye shutter that is transmissive when the liquid crystal display device displays the first eye image, and a second eye shutter that is transmissive when the liquid crystal display device displays the second eye image.
  • the liquid crystal display device further includes a backlight, and the backlight includes at least a part of a rewrite period of the liquid crystal display device from the first eye image to the second eye image.
  • the first shutter and the second shutter are both in a transmissive state during the backlight turn-off period.
  • the backlight is turned off during at least a part of the rewriting period of the liquid crystal display device from the first eye image to the second eye image.
  • Both the first shutter and the second shutter are in a transmissive state during the backlight off period.
  • both the first and second eye shutters can be set in the transmission state without depending on the blanking period which is a limited short period in one frame in the video signal. Therefore, more external light can be incident on the first and second eyes of the user without visually recognizing the reverse image, and flicker can be reliably reduced.
  • an apparatus for detecting the blinking cycle of external light is not necessary, so that an increase in cost can be prevented.
  • the stereoscopic image display system of the present invention includes a liquid crystal display device that sequentially rewrites a first eye image and a second eye image to display one stereoscopic image, and the liquid crystal display device is for the first eye.
  • a first eye shutter that is in a transmissive state when an image is displayed; and a second eye shutter that is in a transmissive state when the liquid crystal display device displays the second eye image.
  • the display device includes a backlight, and the backlight is turned off in at least a part of the rewriting period of the liquid crystal display device from the first eye image to the second eye image, and the first display device is turned off. Both the eye shutter and the second eye shutter are in a transmissive state during the turn-off period of the backlight.
  • FIG. 2 is a schematic diagram showing the configuration of the stereoscopic image display system 1 of the present invention.
  • the stereoscopic image display system 1 includes a liquid crystal display device 2 and 3D glasses 20.
  • the liquid crystal display device 2 includes a liquid crystal panel LCP, a backlight BL, and a drive control unit 10.
  • the drive control unit 10 receives a video signal from the outside, and performs drive control of the liquid crystal panel LCP, the backlight BL, and the 3D glasses 20 based on the received video signal.
  • the liquid crystal panel LCP is a liquid crystal panel capable of displaying a stereoscopic (3D) image or a planar (2D) image.
  • the liquid crystal panel LCP includes an image display area 3, a gate driver GD, and a source driver SD.
  • a plurality of scanning signal lines Gi arranged in parallel to each other and a plurality of data signal lines Sj arranged in parallel to each other are arranged to intersect each other.
  • a region defined by the scanning signal line Gi and the data signal line Sj is a pixel P.
  • the pixels P are arranged in a matrix in the image display area 3.
  • the gate driver GD is arranged along the left side of the image display area 3.
  • the gate driver GD drives each scanning signal line Gi based on the gate driver drive signal GS output from the drive control unit 10.
  • the source driver SD is arranged along the upper side of the image display area 3.
  • the source driver SD drives each data signal line Sj based on the source driver drive signal SS from the drive control unit 10.
  • an active substrate on which a TFT element and a pixel electrode as a switching element are arranged for each pixel P, and a counter substrate on which a color filter and a common electrode are arranged are opposed to each other through a liquid crystal. Configured.
  • the gate driver GD and the source driver SD sequentially scan the pixels to apply a voltage corresponding to a necessary gradation to the pixel electrode of each pixel P.
  • the liquid crystal in each pixel P is driven, and the transmission state of each pixel P is controlled, so that a desired image is displayed (written).
  • the backlight BL illuminates the image display area 3 of the liquid crystal panel LCP from the back side.
  • the backlight BL is turned on or off based on the backlight drive signal BLS output from the drive control unit 10.
  • the light emitted from the backlight BL passes through each pixel P. Thereby, the user can visually recognize the image displayed in the image display area 3.
  • the backlight BL is configured by arranging a plurality of LEDs.
  • the 3D glasses 20 are light shielding devices for shielding incident light to the user's right eye or left eye according to the 3D image displayed on the liquid crystal panel LCP. Thereby, the 3D glasses 20 can make the user stereoscopically view the 3D image displayed on the liquid crystal panel LCP.
  • the 3D glasses 20 include a right-eye liquid crystal shutter 21 (second eye shutter, first eye shutter) for blocking incident light on the user's right eye (second eye, first eye), and the user's left eye. And a left-eye liquid crystal shutter 22 (first-eye shutter, second-eye shutter) for blocking incident light on the first eye and the second eye.
  • a right-eye liquid crystal shutter 21 second eye shutter, first eye shutter
  • a left-eye liquid crystal shutter 22 first-eye shutter, second-eye shutter
  • the 3D glasses 20 Based on the 3D glasses control signal MS and the left and right image identification signal LRS output from the drive control unit 10, the 3D glasses 20 sets each of the liquid crystal shutters 21 and 22 to a transmissive state (open state) or a light shielding state ( Closed).
  • FIG. 3 is a block diagram showing the configuration of the stereoscopic image display system 1.
  • the drive control unit 10 includes an image signal generation unit 11, a liquid crystal panel signal generation unit 12, a backlight signal generation unit 13, and a 3D glasses signal generation unit 14.
  • the 3D glasses 20 include a shutter control unit 23, shutter drive units 24 and 25, and liquid crystal shutters 21 and 22.
  • the image signal generation unit 11 receives a video signal for stereoscopic image display such as for television from the outside. Based on the received video signal, various synchronization signals and gradation signals for stereoscopic image display, a left-eye image (first-eye image, second-eye image), and right-eye image (second-eye image, A left / right image identification signal LRS, which is an identification signal with respect to the first eye image), is generated. Then, the generated signal is output to the liquid crystal panel signal generation unit 12, the backlight signal generation unit 13, and the 3D glasses signal generation unit 14.
  • the image signal generation unit 11 sequentially outputs a left-eye image and a right-eye image for each frame period. Each signal is output to the liquid crystal panel signal generator 12 so as to be displayed on the panel LCP.
  • the image signal generation unit 11 further writes each signal to the liquid crystal panel LCP so that each of the left-eye image and the right-eye image is written in a quarter of one frame period. Generate and output.
  • the liquid crystal panel signal generation unit 12 acquires various signals from the image signal generation unit 11, the liquid crystal panel signal generation unit 12 generates a source driver drive signal SS and a gate driver drive signal GS as image write signals. Then, the liquid crystal panel signal generator 12 outputs the generated source driver drive signal SS to the source driver SD, and outputs the gate driver drive signal GS to the gate driver GD.
  • the backlight signal generation unit 13 When the backlight signal generation unit 13 acquires each signal from the image signal generation unit 11, the backlight signal generation unit 13 generates a backlight drive signal BLS that is a drive signal for turning on and off the backlight BL, and outputs the backlight drive signal BLS to the backlight BL. To do.
  • the signal generation unit 14 for 3D glasses acquires each signal from the image signal generation unit 11, the 3D glasses control signal for controlling the operation of the transmission state and the light shielding state of the liquid crystal shutter 21 for the right eye and the liquid crystal shutter 22 for the left eye. Generate MS. Then, the 3D glasses signal generation unit 14 outputs the generated 3D glasses control signal MS and the left and right image identification signal LRS input from the image signal generation unit 11 to the shutter control unit 23.
  • the shutter controller 23 is a right eye liquid crystal shutter drive signal RS and a left eye liquid crystal shutter drive signal. And LS.
  • the shutter control unit 23 outputs the generated right-eye liquid crystal shutter drive signal RS to the shutter drive unit 24, and controls the shutter drive unit 24 to drive the liquid crystal shutter 21. Further, the shutter control unit 23 outputs the generated left-eye liquid crystal shutter drive signal LS to the shutter drive unit 25, and controls the shutter drive unit 25 to drive the liquid crystal shutter 22.
  • FIG. 1 is a diagram for explaining a display operation of the stereoscopic image display system 1.
  • FIG. 1A shows the operating state of the stereoscopic image display system 1
  • FIG. 1B shows the operating state of the backlight BL
  • FIG. 1C is output to the backlight BL.
  • BLS Backlight drive signal
  • FIG. 1D shows the left and right image identification signal LRS
  • FIG. 1E shows the left-eye liquid crystal shutter driving signal LS and the driving state of the liquid crystal shutter 22
  • FIG. 1F shows the right-eye liquid crystal shutter.
  • the shutter driving signal RS and the driving state of the liquid crystal shutter 21 are shown.
  • One stereoscopic image is composed of a left-eye image (first-eye image, second-eye image) and a right-eye image (second-eye image, first-eye image). Assuming that a period for displaying one stereoscopic image is one frame period (stereoscopic image display period), a left-eye image and a right-eye image are sequentially displayed on the liquid crystal panel LCP for each frame period. The user can stereoscopically view it as a stereoscopic image.
  • one frame period is 16.7 ms (1/60 Hz).
  • One frame period includes a left-eye image display period for displaying a left-eye image (first-eye image display period, second-eye image display period), and a right-eye image for displaying a right-eye image. It consists of a display period (second-eye image display period, first-eye image display period).
  • the left-eye image display period and the right-eye image display period are periods having the same length, and each is a half of one frame period. Furthermore, in the following, each of the left-eye image display period and the right-eye image display period will be described in two periods.
  • the first half period is referred to as the first field
  • the second half period is referred to as the second field.
  • the first half period is referred to as a third field
  • the second half period is referred to as a fourth field.
  • the first field is a period during which the image for the right eye is switched from the image different from the image for the left eye to the image for the left eye.
  • the third field is a period during which the left-eye image is switched to the right-eye image. For this reason, the first field and the third field are periods in which the left-eye image and the right-eye image are displayed together.
  • the second field is a period after the end of switching to the left-eye image, and is a period in which the left-eye image that is a desired image to be displayed between the left-eye image displays is displayed.
  • the fourth field is a period after the end of switching to the right-eye image, and is a period in which the right-eye image, which is a desired image to be displayed between the right-eye image displays, is displayed.
  • the liquid crystal panel LCP sequentially writes the left-eye images in the pixels P of the image display area 3.
  • the right-eye image of the previous frame is written in the image display area 3
  • the right-eye image of the previous frame is rewritten to the left-eye image.
  • the image for the left eye is displayed on the entire surface of the image display area 3 of the liquid crystal panel LCP.
  • the liquid crystal panel LCP continuously displays the left-eye image written on the entire surface of the image display area 3 in the first field.
  • the liquid crystal panel LCP sequentially writes images for the right eye into the pixels P in the image display area 3. That is, the liquid crystal panel LCP sequentially rewrites the left-eye image displayed in the image display area 3 to the right-eye image.
  • the image for the right eye is displayed on the entire surface of the image display area 3 of the liquid crystal panel LCP.
  • the liquid crystal panel LCP continuously displays the image for the right eye written on the entire surface of the image display area 3 in the third field.
  • the liquid crystal panel LCP sequentially writes the left-eye image in the first field, which is the first half of the left-eye image display period, and the left-eye image in the second field, which is the second half. Display continuously. Further, the liquid crystal panel LCP sequentially writes right-eye images in the third field, which is the first half of the right-eye image display period, and continuously displays the right-eye images in the fourth field, which is the second half. .
  • the odd-numbered fields include different images before rewriting (images different from images to be displayed in the right-eye image display period or the left-eye image display period) and images being rewritten ( The image to be displayed in the right-eye image display period or the left-eye image display period) and is displayed in the image display area 3 of the liquid crystal panel LCP.
  • the odd-numbered field can be expressed as a field in which different images are displayed in the image display area 3 of the liquid crystal panel LCP.
  • the image to be displayed in the field (image to be displayed in the right-eye image display period or the left-eye image display period) is continuously displayed in the image display area 3. It can be expressed as a field that has been set.
  • the backlight BL is turned off and on in each of the left-eye image display period and the right-eye image display period.
  • the backlight BL is turned off during the odd field (first field, third field) and turned on during the even field (second field, fourth field).
  • the backlight BL is lit in each frame so that the duty (ratio of lighting time in one frame period) is 50%.
  • the backlight BL is a backlight driving signal BLS in which the first field is low (L), the second field is high (H), the third field is low (L), and the fourth field is high (H). Obtained from the signal generator 13.
  • the backlight BL is turned off in the first field, turned on in the second field, turned off in the third field, and turned off in the fourth field, corresponding to the low / high of the backlight drive signal BLS acquired from the backlight signal generator 13. It lights up.
  • the backlight BL operates similarly in the next frame.
  • the backlight BL is turned off in the first and third fields. Therefore, since it can suppress that the image in which the image for left eyes and the image for right eyes are mixed is visually recognized by a user, it can suppress that the display quality of the image visually recognized by a user deteriorates. .
  • the 3D glasses 20 at least in a part of the odd-numbered field (first and third fields) during which switching to a different image is performed.
  • the open / close state of both shutters 21 and 22 is switched.
  • the shutter control unit 23 acquires the 3D glasses control signal MS from the 3D glasses signal generation unit 14 and also acquires the left and right image identification signal LRS as shown in FIG.
  • the left and right image identification signal LRS indicates a left-eye image display period at high (H), and indicates a right-eye image display period at low (L). Note that high and low may be reversed between the left-eye image display period and the right-eye image display period.
  • the shutter control unit 23 When the shutter control unit 23 acquires the 3D glasses control signal MS and the left and right image identification signal LRS from the 3D glasses signal generation unit 14, as shown in FIGS. 1E and 1F, the shutter control unit 23 drives the liquid crystal shutter for the left eye. Signal LS and right-eye liquid crystal shutter drive signal RS are generated, and liquid crystal shutters 22 and 21 are driven to open and close via shutter drive units 25 and 24, respectively.
  • the left-eye shutter drive signal LS and the right-eye liquid crystal shutter drive signal RS indicate that the liquid crystal shutters 22 and 21 are closed (light-shielded) at low (L), and the liquid crystal shutter 22 at high (H). This indicates that 21 is in an open (transmission) state.
  • the liquid crystal shutters 22 and 21 are both driven so as to be in the closed state ⁇ the open state ⁇ the closed state.
  • the liquid crystal shutter 22 for the left eye is driven so as to be in the closed state ⁇ the open state ⁇ the closed state, while the liquid crystal shutter 21 for the right eye is continuously closed from the first field during the second field. Maintain state.
  • liquid crystal shutters 22 and 21 are both driven so as to be in the closed state ⁇ the open state ⁇ the closed state.
  • the liquid crystal shutter 22 for the left eye continues from the third field and maintains the closed state during the fourth field, while the liquid crystal shutter 21 for the right eye closes ⁇ open ⁇ closes. Drive to be in a state.
  • the 3D glasses 20 are driven in the same manner in the next frame.
  • the liquid crystal shutter 22 for the left eye is in an open state, and the liquid crystal shutter 21 for the right eye is maintained in a closed state. This allows the user to visually recognize the left-eye image only with the left eye.
  • the right-eye liquid crystal shutter 21 is open, and the left-eye liquid crystal shutter 22 is kept closed. Thereby, the user can visually recognize the image for the right eye only with the right eye.
  • both the left and right liquid crystal shutters 21 and 22 are opened.
  • both the liquid crystal shutters 21 and 22 can be in a transmissive state without depending on a blanking period which is a limited short period in one frame in the video signal.
  • the opening and closing cycle is about 60 Hz, and the flicker is easily visible.
  • the period in which the left-eye liquid crystal shutter 22 is open in each of the first to third fields is shorter than each period of the first to third fields.
  • the right eye liquid crystal shutter 21 has a shorter transmission period in each of the first, third, and fourth fields than each of the first, third, and fourth fields.
  • the period during which the left-eye liquid crystal shutters 21 and 22 are in the open state is 4.1 ms or less.
  • the apparent frequency of the open / close cycle of the liquid crystal shutters 21 and 22 is higher than 60 Hz.
  • the period (duty) in which each of the liquid crystal shutters 21 and 22 is open during one frame period is less than 75%.
  • the switching between the closed and open states of the liquid crystal shutters 21 and 22 is performed at a higher cycle than each of the first to fourth fields.
  • the drive control unit 10 may have an outside light detection unit (not shown).
  • a general optical sensor can be used as the outside light detection unit.
  • the external light detection unit detects the amount of external light around the liquid crystal shutters 21 and 22, and outputs external light amount data to the 3D glasses signal generation unit 14.
  • the 3D glasses signal generator 14 generates a 3D glasses control signal MS and a left and right image identification signal LRS in consideration of the light quantity data of external light, and outputs them to the shutter controller 23.
  • the user can easily feel the presence of flicker when the amount of external light is large. Flicker caused by external light can be reduced by generating the 3D glasses control signal MS and the left and right image identification signal LRS so that the transmittance of the liquid crystal shutters 21 and 22 is reduced when the amount of external light is large. it can.
  • the external light detection unit is provided in the 3D glasses 20 (shutter unit).
  • the external light detection unit is provided in the 3D glasses 20 in the vicinity of the user's eyes, it is possible to detect light that actually enters the user's eyes. Thereby, the flicker reduction effect can be improved.
  • a correction value for correcting the liquid crystal shutter drive signal RS / LS may be generated based on the light amount data of the external light.
  • the switching cycle (opening / closing cycle) between the transmission state (open state) and the light shielding state (closed state) of the liquid crystal shutters 21 and 22 may be changed according to the light amount data of the external light.
  • Electric power is required to open and close the liquid crystal shutters 21 and 22.
  • power is supplied from a battery provided in the 3D glasses 20.
  • the opening / closing cycle may be lowered. Therefore, when the amount of external light is small, for example, the opening / closing cycle of the liquid crystal shutters 21 and 22 is lowered as shown in FIG. Thereby, power consumption required for opening and closing the shutter can be reduced, and consumption of the battery can be suppressed.
  • FIG. 5 is a diagram for explaining a display operation of the stereoscopic image display system 1 according to the second embodiment.
  • FIG. 5A shows the state of the operation state of the stereoscopic image display system 1
  • FIG. 5B shows the operation state of the backlight BL
  • FIG. 5C shows the backlight output to the backlight BL.
  • the drive signal BLS is shown.
  • FIG. 5D shows the left and right image identification signal LRS
  • FIG. 5E shows the left-eye liquid crystal shutter driving signal LS and the driving state of the liquid crystal shutter 22
  • FIG. 5F shows the right-eye liquid crystal.
  • the shutter driving signal RS and the driving state of the liquid crystal shutter 21 are shown.
  • the liquid crystal shutters 21 and 22 of the 3D glasses 20 maintain the open state across adjacent fields.
  • the left-eye liquid crystal shutter 22 changes from the closed state to the open state and maintains the open state in the second field, while the right-eye liquid crystal shutter 21 changes from the closed state to the open state to the closed state. Drive to be.
  • the left-eye liquid crystal shutter 22 continues from the first field and remains open during the second field, while the right-eye liquid crystal shutter 21 continues from the first field in the second field. Maintain a closed state during.
  • the liquid crystal shutter 22 for the left eye is opened ⁇ closed, while the liquid crystal shutter 21 for the right eye is driven so as to be closed ⁇ open.
  • the liquid crystal shutter 22 for the left eye continues from the third field and remains closed during the fourth field, while the liquid crystal shutter 21 for the right eye continues from the third field to the fourth field. Maintain an open state during.
  • the 3D glasses 20 are driven in the same manner in the next frame.
  • the liquid crystal shutter 22 for the left eye maintains the open state from the first field to the third field. That is, the left-eye liquid crystal shutter 22 includes the second field that is the backlight BL lighting period in the left-eye image display period, and the next backlight from the first field that is the backlight BL extinguishing period in the left-eye image display period. The open state is maintained over the third field which is the light BL extinguishing period.
  • the right-eye liquid crystal shutter 21 is kept open from the third field to the first field in the frame period of the next stereoscopic image. That is, the right-eye liquid crystal shutter 21 is once opened and closed in the first field, and further includes a fourth field that is the backlight BL lighting period in the right-eye image display period, and the backlight BL extinguishing period in the right-eye image display period. From the third field, the open state is maintained across the first field of the next frame, which is the next backlight BL extinguishing period.
  • the period in which the liquid crystal shutters 21 and 22 are continuously open is longer than the period of one subframe of the first to fourth subframes and shorter than the period of three subframes. .
  • FIG. 6 is a diagram for explaining the display operation of the stereoscopic image display system 1 according to the third embodiment.
  • FIG. 6A shows the operating state of the stereoscopic image display system 1
  • FIG. 6B shows the operating state of the backlight BL
  • FIG. 6C shows the backlight output to the backlight BL.
  • the drive signal BLS is shown.
  • FIG. 6D shows the left / right image identification signal LRS
  • FIG. 6E shows the left-eye liquid crystal shutter drive signal LS and the driving state of the liquid crystal shutter 22
  • FIG. 6F shows the right-eye liquid crystal.
  • the shutter driving signal RS and the driving state of the liquid crystal shutter 21 are shown.
  • the extinguishing periods in the first and third fields of the backlight BL are shorter than the respective periods in the first and third fields. That is, the backlight BL starts to light before the first field and the third field have elapsed.
  • the lighting period per time of the backlight BL is longer than the periods of the second and fourth fields. That is, the backlight BL starts lighting in the middle of the first and third fields, and keeps lighting during each period of the second and fourth fields.
  • the left-eye liquid crystal shutter 22 is driven from the closed state to the open state from the middle of the first field within a range included in the lighting period of the backlight BL. Then, it is driven from the open state to the closed state at the end of the second field as it is.
  • the right-eye liquid crystal shutter 21 is driven from the middle of the third field from the closed state to the open state within a range included in the lighting period of the backlight BL, and is moved from the open state toward the end of the fourth field. Drive to the closed state.
  • the lighting period of the backlight BL can be ensured for a long period of time by shortening the lighting period of the backlight BL in the first and third fields to be shorter than the period of the first and third fields.
  • the user can visually recognize a vivid stereoscopic image with high luminance.
  • the length of the backlight BL turn-off period in the first field and the third field is such that the liquid crystal shutters 21 and 22 can be driven from the closed state to the open state to the closed state, respectively, during the backlight BL turn-off period. Any length is acceptable.
  • the lighting periods of the backlight BL in the second and fourth fields may be shorter than the second and fourth field periods.
  • the backlight BL may be switched from lighting to extinguishing in the middle of the second and fourth fields.
  • the backlight BL is lit for about 10% of the left-eye image display period and the right-eye image display period for each of the second field and the fourth field, Since each of the images for the right eye can be visually recognized by the user, the stereoscopic image can be visually recognized by the user.
  • the backlight BL is turned off in at least a part of the first field and the third field, which are the first half of the left-eye image display period and the right-eye image display period, and the left-eye image display period and the right-eye image display period. It suffices if the second field and the fourth field, which are the second half of each of the image display periods, are lit in at least a partial period.
  • FIG. 7 is a diagram for explaining a display operation of the stereoscopic image display system 1 according to the fourth embodiment.
  • FIG. 7A shows the operating state of the stereoscopic image display system 1
  • FIG. 7B shows the operating state of the backlight BL
  • FIG. 7C shows the backlight output to the backlight BL.
  • the drive signal BLS is shown.
  • FIG. 7D shows the left and right image identification signal LRS
  • FIG. 7E shows the left-eye liquid crystal shutter drive signal LS and the driving state of the liquid crystal shutter 22
  • FIG. 7F shows the right-eye liquid crystal.
  • the shutter driving signal RS and the driving state of the liquid crystal shutter 21 are shown.
  • the liquid crystal shutters 21 and 22 of the 3D glasses 20 are repeatedly driven in a closed state ⁇ open state ⁇ closed state several times within one field.
  • both the liquid crystal shutters 22 and 21 are driven so as to continuously perform the drive of the closed state ⁇ the open state ⁇ the closed state twice.
  • the liquid crystal shutter 22 for the left eye is driven so as to continuously drive the closed state ⁇ the open state ⁇ the closed state twice, while the liquid crystal shutter 21 for the right eye continues from the first field. Then, the closed state is maintained during the second field.
  • both the liquid crystal shutters 22 and 21 are driven so as to continuously perform the drive of the closed state ⁇ the open state ⁇ the closed state twice.
  • the liquid crystal shutter 22 for the left eye continues from the third field and maintains the closed state during the fourth field, while the liquid crystal shutter 21 for the right eye closes ⁇ open ⁇ It drives so that the drive which will be in a closed state may be performed twice continuously.
  • the 3D glasses 20 are driven in the same manner in the next frame.
  • the liquid crystal shutter 22 enters the transmission state twice in each period of the first to third fields.
  • the liquid crystal shutter 21 is in a transmissive state twice each within the period of each of the first, third, and fourth fields.
  • the switching between the transmission state and the light shielding state of the liquid crystal shutters 2 and 22 is switched at a period higher than the period of each field, so that a higher flicker reduction effect can be obtained.
  • the number of times that the liquid crystal shutters 21 and 22 are driven from the closed state to the open state to the closed state within one field is not limited to two times, and may be three times or more. It is sufficient that the driving of the liquid crystal molecules of the liquid crystal shutters 21 and 22 can be controlled.
  • the stereoscopic image display period in which the liquid crystal display device displays one stereoscopic image includes a first-eye image display period and a second-eye image display period, and the backlight includes the first image display period. It is preferable that the eye image display period and the second eye image display period are turned off and turned on.
  • the stereoscopic image can be visually recognized without allowing the first and second eyes of the user to visually recognize the opposite image.
  • the backlight is turned off in at least a part of the first half of the first image display period and the second image display period, and the first image display period and the second image display period. It is preferable to light up at least a part of the second half of each of the eye image display periods.
  • the first half of the first eye image display period is a period during which the first eye image such as the second eye image is switched from an image different from the first eye image.
  • the first half of the second eye image display period is a period during which the second eye image is switched to the first eye image. Therefore, each of the first half periods is a period in which the first eye image and the second eye image are displayed together.
  • the latter half of the first image display period and the second image display period is a period after the end of image switching, and a period during which a desired image to be displayed in each period is displayed. It is.
  • the backlight is turned off in at least a part of the first half of each of the first image display period and the second image display period, and the first image is displayed. Since the light is turned on in at least a part of the second half of each of the display period and the second image display period, it is possible to prevent the user from visually recognizing the image in which the first and second images are mixed. be able to. For this reason, it can suppress that the display quality of the image visually recognized by a user deteriorates.
  • the first eye shutter is in a transmissive state during the backlight turn-off period and the backlight lighting period in the first eye image display period, and the second eye shutter is in the backlight state. It is preferable that the light is turned on during the light extinction period and the backlight illumination period in the second image display period.
  • the first-eye shutter is in a transmissive state during the backlight lighting period in the first-eye image display period in which the first-eye image is displayed on the liquid crystal display device.
  • the first eye image can surely enter the first eye of the user.
  • the second eye shutter since the second eye shutter is in the transmission state during the backlight lighting period in the second eye image display period in which the second eye image is displayed on the liquid crystal display device, the second eye image is displayed.
  • the eye image can be reliably incident on the second eye of the user.
  • the user can reliably stereoscopically view the image displayed on the liquid crystal display device.
  • both the first and second eye shutters are in a transmissive state during the backlight off period, the first image and the second eye of the user are not visually recognized on the opposite side. , More external light can be incident.
  • the period in which the first shutter and the second shutter are in the transmission state during the backlight turn-off period is shorter than the backlight turn-off period.
  • the first and second shutters are switched between the light shielding state and the transmission state at a cycle faster than the backlight extinguishing period.
  • each of the first shutter and the second shutter may maintain the transmission state from the backlight extinction period to the next backlight extinction period different from the extinction period.
  • the first and second shutters can be in a transmissive state for a long time. For this reason, since the frequency component of the light entering the user's eyes can be dispersed, the flicker reduction effect can be enhanced.
  • the backlight is turned off during the first half of each of the first image display period and the second image display period, and the first image display period and the second image display period. It is preferable that the light is turned on during the latter half of each of the two-eye image display periods.
  • the user does not visually recognize the image during the rewriting period of the first eye image and the second eye image, and allows the user to visually recognize the first eye image or the second eye image after the rewriting is completed. be able to. For this reason, the user can stereoscopically view a high-quality stereoscopic image.
  • the extinguishing period of the backlight in the first half period of each of the first eye image display period and the second eye image display period is the first eye image display period and the second eye display period.
  • the period may be shorter than the first half of each eye image display period.
  • the backlight lighting period can be ensured for a long period of time, so that the user can visually recognize a vivid stereoscopic image with high luminance.
  • the lighting periods of the backlight in the latter half of each of the first-eye image display period and the second-eye image display period are the first-eye image display period and the second-eye image display period.
  • the image display period may be shorter than the latter half of each period.
  • the first eye shutter is in a transmission state a plurality of times during the backlight turning-off period and the backlight lighting period in the first eye image display period.
  • the second eye shutter may be in a transmissive state a plurality of times during the backlight turn-off period and the backlight lighting period in the second eye image display period.
  • An external light detection unit that detects the amount of external light; and a shutter control unit that changes a transmitted light amount of at least one of the first eye shutter and the second eye shutter.
  • the shutter control unit changes the amount of transmitted light in the transmission state of at least one of the first eye shutter and the second eye shutter according to the amount of external light detected by the external light detection unit. May be.
  • the transmitted light amount of the first eye shutter or the second eye shutter can be changed in accordance with the amount of external light.
  • the first eye shutter and the second eye shutter may be arranged in a shutter portion, and the shutter portion may include the external light detection portion.
  • the external light detection unit is provided near the user, and the amount of light that is actually incident on the user's eyes can be detected. As a result, the amount of light incident on the user's eyes can be detected more accurately, and flicker can be made harder for the user.
  • the first shutter and the second shutter can be switched between the transmission state and the light shielding state alternately, and the first shutter is switched according to the amount of external light detected by the external light detection unit.
  • the switching cycle between the transmission state and the light shielding state of at least one of the shutter and the second shutter may be changed.
  • the opening / closing cycle of the first shutter or the second shutter can be changed according to the amount of external light.
  • the amount of external light is small, the effect of flicker is reduced even if the opening / closing cycle is lowered. Therefore, when the amount of external light is small, the opening / closing cycle can be lowered, and the power consumption required for opening / closing the shutter can be reduced. Thereby, the consumption of the battery required for opening and closing the shutter can be suppressed.
  • the present invention can be widely applied to image display devices that are required to display stereoscopic images.
  • SYMBOLS 1 Stereoscopic image display system 2 Liquid crystal display device 3 Image display area 10 Drive control part 11 Image signal generation part 12 Signal generation part for liquid crystal panels 13 Signal generation part for backlight 14 Signal generation part for 3D glasses 20 3D glasses (shutter part) 21 Liquid crystal shutter (second eye shutter, first eye shutter) 22 Liquid crystal shutter (first eye shutter, second eye shutter) 23 Shutter Control Unit 24 Shutter Drive Unit 24/25 Shutter Drive Unit BL Backlight GD Gate Driver SD Source Driver LCP Liquid Crystal Panel P Pixel

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Abstract

The objective of the present invention is to prevent increase in manufacturing cost and to reliably reduce flickering without depending on blanking periods. In this stereoscopic image display system (1), a backlight (BL) turns off during at least a portion of a period within a first field, which is a period of rewriting from a left-eye-use image to a right-eye-use image for a liquid crystal display device (2), and both of a left-eye-use liquid crystal shutter (22) and a right-eye-use liquid crystal shutter (21) are caused to be in a transparent state during the off-periods of the backlight (BL).

Description

立体画像表示システムStereoscopic image display system
　本発明は、立体画像表示システムに関する。 The present invention relates to a stereoscopic image display system.
　近年、液晶シャッタを用いて、ユーザに立体画像を鑑賞させることが可能な立体映像表示システムが開発されている。 Recently, a stereoscopic video display system has been developed that allows a user to appreciate a stereoscopic image using a liquid crystal shutter.
　このような立体映像表示システムでは、表示装置に、右目用画像と、左目用画像とを順次表示すると共に、それと同期して、右目用の液晶シャッタと、左目用の液晶シャッタとの透過状態を順次切替える。これにより、ユーザは、右目と左目との視差により、立体画像を鑑賞することができる。 In such a stereoscopic video display system, the right-eye image and the left-eye image are sequentially displayed on the display device, and the transmission state of the right-eye liquid crystal shutter and the left-eye liquid crystal shutter is changed in synchronization with the display. Switch sequentially. Thereby, the user can appreciate a stereoscopic image by the parallax between the right eye and the left eye.
　しかし、上記立体映像表示システムでは、液晶シャッタの透過状態を順次切替えるので、表示装置の周囲の照明光に対してちらつき（以下、フリッカと称する）を感じる場合がある。 However, in the stereoscopic video display system, since the transmission state of the liquid crystal shutter is sequentially switched, flicker (hereinafter referred to as flicker) may be perceived with respect to illumination light around the display device.
　そこで、特許文献１、２には、ブランキング期間を利用して液晶シャッタを開閉制御する立体映像再生システムが開示されている。 Therefore, Patent Documents 1 and 2 disclose a stereoscopic video reproduction system that controls opening and closing of a liquid crystal shutter using a blanking period.
　例えば、特許文献１では、ブランキング期間である走査線が表示されていない期間が、右目用・左目用の液晶シャッタの透過周期であっても、一時的にそれぞれの液晶シャッタを閉じる。 For example, in Patent Document 1, each liquid crystal shutter is temporarily closed even if the scanning period, which is the blanking period, is a transmission period of the right-eye and left-eye liquid crystal shutters.
　また、逆に、ブランキング期間が、右目用・左目用の液晶シャッタの遮断周期であっても、一時的にそれぞれの液晶シャッタを開く。 Also, conversely, even if the blanking period is the cutoff cycle of the right-eye and left-eye liquid crystal shutters, the respective liquid crystal shutters are temporarily opened.
　これにより、眼に入る光の刺激を平均化してフリッカを低減している。 This reduces the flicker by averaging the stimulus of light entering the eye.
　また、特許文献３では、商用電源周波数の周期で点滅する外光である照明光の点滅周期を検出するための点滅周期検出手段を設けている表示システムが開示されている。 Further, Patent Document 3 discloses a display system provided with a blinking cycle detecting means for detecting a blinking cycle of illumination light that is external light blinking at a cycle of a commercial power supply frequency.
　特許文献３では、点滅周期検出手段で得られた外光の点滅周期に同期させて、光シャッタを開閉することで、フリッカを低減している。 In Patent Document 3, flicker is reduced by opening and closing the optical shutter in synchronization with the blinking cycle of external light obtained by the blinking cycle detection means.
日本国公開特許公報「特開昭６４‐８６６９４号公報（１９８９年３月３１日公開）」Japanese Patent Publication "Japanese Patent Laid-Open No. 64-86694 (published on March 31, 1989)" 日本国公開特許公報「特開平９‐１３８３８４号公報（１９９７年５月２７日公開）」Japanese Patent Publication “JP 9-138384 A (published May 27, 1997)” 国際公開特許公報「ＷＯ２００８／０５６７５３号公報（２００８年５月１５日国際公開）」International Patent Publication “WO2008 / 056753 Publication (May 15, 2008 International Publication)”
　しかし、１フレーム期間中のブランキング期間は、非常に短い期間である。このため、特許文献１、２の駆動方法では、フリッカの低減効果が不十分であるという課題が生じる。 However, the blanking period in one frame period is a very short period. For this reason, the driving methods disclosed in Patent Documents 1 and 2 have a problem that the flicker reduction effect is insufficient.
　また、特許文献３の表示システムでは、新たに、外光の点滅周期を検出するための点滅周期検出手段を装置内に配する必要があるので、製造コスト増大の原因となる。 Further, in the display system of Patent Document 3, it is necessary to newly provide a blinking period detecting means for detecting the blinking period of external light in the apparatus, which causes an increase in manufacturing cost.
　本発明は、上記の問題点を解決するためになされたもので、その目的は、製造コストの増大を防止して、かつ、ブランキング期間に依存せず、確実にフリッカを低減することである。 The present invention has been made to solve the above-described problems, and an object thereof is to prevent an increase in manufacturing cost and reliably reduce flicker without depending on the blanking period. .
　上記の課題を解決するために、本発明の立体画像表示システムは、第１目用画像と、第２目用画像とを順次、書き換えて、一つの立体画像を表示する液晶表示装置と、上記液晶表示装置が上記第１目用画像を表示する際に透過状態とする第１目用シャッタと、上記液晶表示装置が上記第２目用画像を表示する際に透過状態とする第２目用シャッタとを備え、さらに、上記液晶表示装置はバックライトを備え、上記バックライトは、上記液晶表示装置の、上記第１目用画像から第２目用画像への書き換え期間のうち、少なくとも一部の期間で消灯し、上記第１目用シャッタと、上記第２目用シャッタとの両方は、上記バックライトの消灯期間に透過状態となることを特徴としている。 In order to solve the above problems, a stereoscopic image display system of the present invention includes a liquid crystal display device that sequentially rewrites an image for a first eye and an image for a second eye to display one stereoscopic image, A first eye shutter that is transmissive when the liquid crystal display device displays the first eye image, and a second eye shutter that is transmissive when the liquid crystal display device displays the second eye image. The liquid crystal display device further includes a backlight, and the backlight includes at least a part of a rewrite period of the liquid crystal display device from the first eye image to the second eye image. The first shutter and the second shutter are both in a transmissive state during the backlight turn-off period.
　上記構成によると、上記バックライトは、上記液晶表示装置の、上記第１目用画像から第２目用画像への書き換え期間のうち、少なくとも一部の期間で消灯する。そして、上記第１目シャッタと、上記第２目用シャッタとの両方は、上記バックライトの消灯期間に透過状態とする。 According to the above configuration, the backlight is turned off during at least a part of the rewriting period of the liquid crystal display device from the first eye image to the second eye image. Both the first shutter and the second shutter are in a transmissive state during the backlight off period.
　これにより、映像信号における１フレーム中の限られた短い期間であるブランキング期間に依存することなく、上記第１及び第２目用シャッタ両方を透過状態とすることができる。このため、ユーザの第１目及び第２目のそれぞれに、逆側の画像を視認させることなく、より、多くの外光を入射させることができ、フリッカを確実に低減することができる。 Thereby, both the first and second eye shutters can be set in the transmission state without depending on the blanking period which is a limited short period in one frame in the video signal. Therefore, more external light can be incident on the first and second eyes of the user without visually recognizing the reverse image, and flicker can be reliably reduced.
　さらに、上記構成によると、例えば、外光の点滅周期を検出するための装置も不要なので、コスト増大も防止することができる。 Furthermore, according to the above configuration, for example, an apparatus for detecting the blinking cycle of external light is not necessary, so that an increase in cost can be prevented.
　本発明の立体画像表示システムは、第１目用画像と、第２目用画像とを順次、書き換えて、一つの立体画像を表示する液晶表示装置と、上記液晶表示装置が上記第１目用画像を表示する際に透過状態とする第１目用シャッタと、上記液晶表示装置が上記第２目用画像を表示する際に透過状態とする第２目用シャッタとを備え、さらに、上記液晶表示装置はバックライトを備え、上記バックライトは、上記液晶表示装置の、上記第１目用画像から第２目用画像への書き換え期間のうち、少なくとも一部の期間で消灯し、上記第１目用シャッタと、上記第２目用シャッタとの両方は、上記バックライトの消灯期間に透過状態となる。 The stereoscopic image display system of the present invention includes a liquid crystal display device that sequentially rewrites a first eye image and a second eye image to display one stereoscopic image, and the liquid crystal display device is for the first eye. A first eye shutter that is in a transmissive state when an image is displayed; and a second eye shutter that is in a transmissive state when the liquid crystal display device displays the second eye image. The display device includes a backlight, and the backlight is turned off in at least a part of the rewriting period of the liquid crystal display device from the first eye image to the second eye image, and the first display device is turned off. Both the eye shutter and the second eye shutter are in a transmissive state during the turn-off period of the backlight.
　これにより、製造コストの増大を防止して、かつ、ブランキング期間に依存せず、確実にフリッカを低減するという効果を奏する。 This prevents the increase in manufacturing cost and reliably reduces flicker without depending on the blanking period.
第１の実施形態に係る立体画像表示システムの表示動作を説明するための図である。It is a figure for demonstrating the display operation of the stereo image display system which concerns on 1st Embodiment. 本発明の立体画像表示システムの構成を表す概略図である。It is the schematic showing the structure of the stereo image display system of this invention. 本発明の立体画像表示システムの構成を表すブロック図である。It is a block diagram showing the structure of the stereo image display system of this invention. メガネの開閉デューティーが５０％の立体画像表示システムの表示動作を説明する図である。It is a figure explaining the display operation of the stereo image display system whose opening / closing duty of glasses is 50%. 第２の実施形態に係る立体画像表示システムの表示動作を説明するための図である。It is a figure for demonstrating the display operation of the stereo image display system which concerns on 2nd Embodiment. 第３の実施形態に係る立体画像表示システムの表示動作を説明するための図である。It is a figure for demonstrating the display operation of the stereo image display system which concerns on 3rd Embodiment. 第４の実施形態に係る立体画像表示システムの表示動作を説明するための図である。It is a figure for demonstrating the display operation of the stereo image display system which concerns on 4th Embodiment. 従来の立体映像再生システムの表示動作を説明するための図である。It is a figure for demonstrating the display operation | movement of the conventional stereoscopic video reproduction | regeneration system.
　以下、本発明の実施の形態について、詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail.
　〔実施の形態１〕
　（立体画像表示システムの構成）
　まず、図２、図３を用いて、本発明の立体画像表示システム１の構成について説明する。 [Embodiment 1]
(Configuration of stereoscopic image display system)
First, the configuration of the stereoscopic image display system 1 of the present invention will be described with reference to FIGS. 2 and 3.
　図２は、本発明の立体画像表示システム１の構成を表す概略図である。 FIG. 2 is a schematic diagram showing the configuration of the stereoscopic image display system 1 of the present invention.
　図２に示すように、立体画像表示システム１は、液晶表示装置２と、３Ｄメガネ２０とを備えている。 As shown in FIG. 2, the stereoscopic image display system 1 includes a liquid crystal display device 2 and 3D glasses 20.
　液晶表示装置２は、液晶パネルＬＣＰと、バックライトＢＬと、駆動制御部１０とを備えている。 The liquid crystal display device 2 includes a liquid crystal panel LCP, a backlight BL, and a drive control unit 10.
　駆動制御部１０は、外部から、映像信号を受信し、当該受信した映像信号に基づいて、液晶パネルＬＣＰ、バックライトＢＬ、及び３Ｄメガネ２０のそれぞれの駆動制御を行うためのものである。 The drive control unit 10 receives a video signal from the outside, and performs drive control of the liquid crystal panel LCP, the backlight BL, and the 3D glasses 20 based on the received video signal.
　液晶パネルＬＣＰは、立体（３Ｄ）画像又は平面（２Ｄ）画像の表示が可能な液晶パネルである。液晶パネルＬＣＰは、画像表示領域３と、ゲートドライバＧＤと、ソースドライバＳＤとを備えている。 The liquid crystal panel LCP is a liquid crystal panel capable of displaying a stereoscopic (3D) image or a planar (2D) image. The liquid crystal panel LCP includes an image display area 3, a gate driver GD, and a source driver SD.
　画像表示領域３には、互いに平行に配されている複数の走査信号線Ｇｉと、互いに平行に配されている複数のデータ信号線Ｓｊと、が交差して配されている。走査信号線Ｇｉと、データ信号線Ｓｊとによって区画されている領域が画素Ｐである。画素Ｐは、画像表示領域３にマトリクス状に配されている。 In the image display area 3, a plurality of scanning signal lines Gi arranged in parallel to each other and a plurality of data signal lines Sj arranged in parallel to each other are arranged to intersect each other. A region defined by the scanning signal line Gi and the data signal line Sj is a pixel P. The pixels P are arranged in a matrix in the image display area 3.
　ゲートドライバＧＤは、画像表示領域３の左辺に沿って配されている。ゲートドライバＧＤは、駆動制御部１０から出力されてくるゲートドライバ駆動信号ＧＳに基づいて、各走査信号線Ｇｉを駆動する。 The gate driver GD is arranged along the left side of the image display area 3. The gate driver GD drives each scanning signal line Gi based on the gate driver drive signal GS output from the drive control unit 10.
　ソースドライバＳＤは、画像表示領域３の上辺に沿って配されている。ソースドライバＳＤは、駆動制御部１０からのソースドライバ駆動信号ＳＳに基づいて、各データ信号線Ｓｊを駆動する。 The source driver SD is arranged along the upper side of the image display area 3. The source driver SD drives each data signal line Sj based on the source driver drive signal SS from the drive control unit 10.
　液晶パネルＬＣＰは、各画素Ｐ毎にスイッチング素子としてのＴＦＴ素子及び画素電極が配されているアクティブ基板と、カラーフィルタ及び共通電極が配されている対向基板とが、液晶を介して対向配置されて構成されている。 In the liquid crystal panel LCP, an active substrate on which a TFT element and a pixel electrode as a switching element are arranged for each pixel P, and a counter substrate on which a color filter and a common electrode are arranged are opposed to each other through a liquid crystal. Configured.
　画像表示領域３に画像表示を行う際、ゲートドライバＧＤ、及びソースドライバＳＤは、画素を順次走査することで、必要な階調に対応する電圧を各画素Ｐの画素電極に印加する。これにより、各画素Ｐ内の液晶が駆動し、各画素Ｐ透過状態が制御されることで、所望の画像が表示される（書き込まれる）。 When performing image display in the image display area 3, the gate driver GD and the source driver SD sequentially scan the pixels to apply a voltage corresponding to a necessary gradation to the pixel electrode of each pixel P. As a result, the liquid crystal in each pixel P is driven, and the transmission state of each pixel P is controlled, so that a desired image is displayed (written).
　バックライトＢＬは、液晶パネルＬＣＰの画像表示領域３を背面側から照明するものである。バックライトＢＬは、駆動制御部１０から出力されてくるバックライト駆動信号ＢＬＳに基づいて点灯したり、消灯したりする。 The backlight BL illuminates the image display area 3 of the liquid crystal panel LCP from the back side. The backlight BL is turned on or off based on the backlight drive signal BLS output from the drive control unit 10.
　バックライトＢＬから発光された光は、各画素Ｐを透過する。これにより、画像表示領域３に表示されている画像をユーザに視認させることができる。バックライトＢＬは、例えば、ＬＥＤが複数配されることで構成されている。 The light emitted from the backlight BL passes through each pixel P. Thereby, the user can visually recognize the image displayed in the image display area 3. For example, the backlight BL is configured by arranging a plurality of LEDs.
　３Ｄメガネ２０は、液晶パネルＬＣＰに表示する３Ｄ画像に応じて、ユーザの右目又は左目への入射光を遮光するための遮光装置である。これにより、３Ｄメガネ２０は、液晶パネルＬＣＰに表示されている３Ｄ画像を、ユーザに立体視させることができる。 The 3D glasses 20 are light shielding devices for shielding incident light to the user's right eye or left eye according to the 3D image displayed on the liquid crystal panel LCP. Thereby, the 3D glasses 20 can make the user stereoscopically view the 3D image displayed on the liquid crystal panel LCP.
　３Ｄメガネ２０は、ユーザの右目（第２目、第１目）への入射光を遮光するための右目用の液晶シャッタ２１（第２目用シャッタ、第１目用シャッタ）と、ユーザの左目（第１目、第２目）への入射光を遮光するための左目用の液晶シャッタ２２（第１目用シャッタ、第２目用シャッタ）とを備えている。 The 3D glasses 20 include a right-eye liquid crystal shutter 21 (second eye shutter, first eye shutter) for blocking incident light on the user's right eye (second eye, first eye), and the user's left eye. And a left-eye liquid crystal shutter 22 (first-eye shutter, second-eye shutter) for blocking incident light on the first eye and the second eye.
　３Ｄメガネ２０は、駆動制御部１０から出力されてくる３Ｄメガネ制御信号ＭＳ、及び左右画像識別信号ＬＲＳに基づいて、液晶シャッタ２１・２２のそれぞれを透過状態（開状態）にしたり、遮光状態（閉状態）にしたりする。 Based on the 3D glasses control signal MS and the left and right image identification signal LRS output from the drive control unit 10, the 3D glasses 20 sets each of the liquid crystal shutters 21 and 22 to a transmissive state (open state) or a light shielding state ( Closed).
　図３は、立体画像表示システム１の構成を表すブロック図である。 FIG. 3 is a block diagram showing the configuration of the stereoscopic image display system 1.
　駆動制御部１０は、画像信号生成部１１と、液晶パネル用信号生成部１２と、バックライト用信号生成部１３と、３Ｄメガネ用信号生成部１４とを備えている。 The drive control unit 10 includes an image signal generation unit 11, a liquid crystal panel signal generation unit 12, a backlight signal generation unit 13, and a 3D glasses signal generation unit 14.
　また、３Ｄメガネ２０は、シャッタ制御部２３と、シャッタ駆動部２４・２５と、液晶シャッタ２１・２２とを備えている。 The 3D glasses 20 include a shutter control unit 23, shutter drive units 24 and 25, and liquid crystal shutters 21 and 22.
　画像信号生成部１１は、外部から、テレビ用等の立体画像表示用の映像信号を受信する。そして、受信した映像信号に基づいて、立体画像表示用の各種の同期信号や階調用信号、左目画像（第１目用画像、第２目用画像）と右目用画像（第２目用画像、第１目用画像）との識別信号である左右画像識別信号ＬＲＳ等を生成する。そして、生成した信号を液晶パネル用信号生成部１２、バックライト用信号生成部１３、及び３Ｄメガネ用信号生成部１４に出力する。 The image signal generation unit 11 receives a video signal for stereoscopic image display such as for television from the outside. Based on the received video signal, various synchronization signals and gradation signals for stereoscopic image display, a left-eye image (first-eye image, second-eye image), and right-eye image (second-eye image, A left / right image identification signal LRS, which is an identification signal with respect to the first eye image), is generated. Then, the generated signal is output to the liquid crystal panel signal generation unit 12, the backlight signal generation unit 13, and the 3D glasses signal generation unit 14.
　ここで、１つの立体画像を表示する期間を１フレーム期間（立体画像表示期間）とすると、画像信号生成部１１は、１フレーム期間毎に、左目用画像と、右目用画像とを順次、液晶パネルＬＣＰに表示するように、液晶パネル用信号生成部１２に各信号を出力する。 Here, assuming that a period for displaying one stereoscopic image is one frame period (stereoscopic image display period), the image signal generation unit 11 sequentially outputs a left-eye image and a right-eye image for each frame period. Each signal is output to the liquid crystal panel signal generator 12 so as to be displayed on the panel LCP.
　本実施の形態では、さらに、画像信号生成部１１は、左目用画像と、右目用画像とのそれぞれを、１フレーム期間の１／４の期間で、液晶パネルＬＣＰに書き込ませるように各信号を生成し出力する。 In the present embodiment, the image signal generation unit 11 further writes each signal to the liquid crystal panel LCP so that each of the left-eye image and the right-eye image is written in a quarter of one frame period. Generate and output.
　液晶パネル用信号生成部１２は、画像信号生成部１１からの各種の信号を取得すると、画像の書き込み用信号として、ソースドライバ駆動信号ＳＳ・ゲートドライバ駆動信号ＧＳを生成する。そして、液晶パネル用信号生成部１２は、生成したソースドライバ駆動信号ＳＳをソースドライバＳＤへ出力し、ゲートドライバ駆動信号ＧＳをゲートドライバＧＤへ出力する。 When the liquid crystal panel signal generation unit 12 acquires various signals from the image signal generation unit 11, the liquid crystal panel signal generation unit 12 generates a source driver drive signal SS and a gate driver drive signal GS as image write signals. Then, the liquid crystal panel signal generator 12 outputs the generated source driver drive signal SS to the source driver SD, and outputs the gate driver drive signal GS to the gate driver GD.
　バックライト用信号生成部１３は、画像信号生成部１１からの各信号を取得すると、バックライトＢＬの点灯及び消灯させるための駆動信号であるバックライト駆動信号ＢＬＳを生成し、バックライトＢＬへ出力する。 When the backlight signal generation unit 13 acquires each signal from the image signal generation unit 11, the backlight signal generation unit 13 generates a backlight drive signal BLS that is a drive signal for turning on and off the backlight BL, and outputs the backlight drive signal BLS to the backlight BL. To do.
　３Ｄメガネ用信号生成部１４は、画像信号生成部１１からの各信号を取得すると、右目用の液晶シャッタ２１及び左目用の液晶シャッタ２２の透過状態及び遮光状態の動作制御用の３Ｄメガネ制御信号ＭＳを生成する。そして、３Ｄメガネ用信号生成部１４は、生成した３Ｄメガネ制御信号ＭＳ、及び画像信号生成部１１から入力されてきた左右画像識別信号ＬＲＳをシャッタ制御部２３に出力する。 When the signal generation unit 14 for 3D glasses acquires each signal from the image signal generation unit 11, the 3D glasses control signal for controlling the operation of the transmission state and the light shielding state of the liquid crystal shutter 21 for the right eye and the liquid crystal shutter 22 for the left eye. Generate MS. Then, the 3D glasses signal generation unit 14 outputs the generated 3D glasses control signal MS and the left and right image identification signal LRS input from the image signal generation unit 11 to the shutter control unit 23.
　シャッタ制御部２３は、３Ｄメガネ用信号生成部１４から取得した３Ｄメガネ制御信号ＭＳ及び左右画像識別信号ＬＲＳに基づいて、右目用の液晶シャッタ駆動用信号ＲＳと、左目用の液晶シャッタ駆動用信号ＬＳとを生成する。 Based on the 3D glasses control signal MS and the left and right image identification signal LRS acquired from the 3D glasses signal generator 14, the shutter controller 23 is a right eye liquid crystal shutter drive signal RS and a left eye liquid crystal shutter drive signal. And LS.
　そして、シャッタ制御部２３は、生成した右目用の液晶シャッタ駆動用信号ＲＳをシャッタ駆動部２４に出力し、シャッタ駆動部２４に液晶シャッタ２１の駆動を制御させる。また、シャッタ制御部２３は、生成した左目用の液晶シャッタ駆動用信号ＬＳをシャッタ駆動部２５に出力し、シャッタ駆動部２５に液晶シャッタ２２の駆動を制御させる。 Then, the shutter control unit 23 outputs the generated right-eye liquid crystal shutter drive signal RS to the shutter drive unit 24, and controls the shutter drive unit 24 to drive the liquid crystal shutter 21. Further, the shutter control unit 23 outputs the generated left-eye liquid crystal shutter drive signal LS to the shutter drive unit 25, and controls the shutter drive unit 25 to drive the liquid crystal shutter 22.
　（立体画像表示システムの表示動作）
　次に、図１を用いて、立体画像表示システム１の表示動作について説明する。図１は、立体画像表示システム１の表示動作を説明するための図である。 (Display operation of stereoscopic image display system)
Next, the display operation of the stereoscopic image display system 1 will be described with reference to FIG. FIG. 1 is a diagram for explaining a display operation of the stereoscopic image display system 1.
　図１の（ａ）は立体画像表示システム１の動作状態の様子を表しており、図１の（ｂ）はバックライトＢＬの動作状態を表しており、（ｃ）はバックライトＢＬへ出力されるバックライト駆動信号ＢＬＳを表している。 FIG. 1A shows the operating state of the stereoscopic image display system 1, FIG. 1B shows the operating state of the backlight BL, and FIG. 1C is output to the backlight BL. Represents the backlight drive signal BLS.
　図１の（ｄ）は左右画像識別信号ＬＲＳを表しており、（ｅ）は左目用の液晶シャッタ駆動用信号ＬＳと液晶シャッタ２２の駆動状態を表しており、（ｆ）は右目用の液晶シャッタ駆動用信号ＲＳと液晶シャッタ２１の駆動状態を表している。 1D shows the left and right image identification signal LRS, FIG. 1E shows the left-eye liquid crystal shutter driving signal LS and the driving state of the liquid crystal shutter 22, and FIG. 1F shows the right-eye liquid crystal shutter. The shutter driving signal RS and the driving state of the liquid crystal shutter 21 are shown.
　１つの立体画像は、左目用画像（第１目用画像、第２目用画像）と、右目用画像（第２目用画像、第１目用画像）とから構成されている。１つの立体画像を表示する期間を１フレーム期間（立体画像表示期間）とすると、１フレーム期間毎に、左目用画像と、右目用画像とを順次、液晶パネルＬＣＰに表示することで、１つの立体画像としてユーザに立体視させることができる。 One stereoscopic image is composed of a left-eye image (first-eye image, second-eye image) and a right-eye image (second-eye image, first-eye image). Assuming that a period for displaying one stereoscopic image is one frame period (stereoscopic image display period), a left-eye image and a right-eye image are sequentially displayed on the liquid crystal panel LCP for each frame period. The user can stereoscopically view it as a stereoscopic image.
　図１の（ａ）に示すように、本実施の形態では、１フレーム期間は１６．７ｍｓ（１／６０Ｈｚ）である。１フレーム期間は、左目用画像を表示するための左目用画像表示期間（第１目用画像表示用期間、第２目用画像表示用期間）と、右目用画像を表示するための右目用画像表示期間（第２目用画像表示用期間、第１目用画像表示用期間）とからなる。 As shown in FIG. 1A, in this embodiment, one frame period is 16.7 ms (1/60 Hz). One frame period includes a left-eye image display period for displaying a left-eye image (first-eye image display period, second-eye image display period), and a right-eye image for displaying a right-eye image. It consists of a display period (second-eye image display period, first-eye image display period).
　左目用画像表示期間と、右目用画像表示期間とは、同じ長さの期間であり、それぞれ、１フレーム期間の１／２である。さらに、以下では、左目用画像表示期間と、右目用画像表示期間とのそれぞれを、２つの期間に分けて説明する。 The left-eye image display period and the right-eye image display period are periods having the same length, and each is a half of one frame period. Furthermore, in the following, each of the left-eye image display period and the right-eye image display period will be described in two periods.
　左目用画像表示期間のうち、前半の期間を第１フィールド、後半の期間を第２フィールドと称する。また、右目用画像表示期間のうち、前半の期間を第３フィールド、後半の期間を第４フィールドと称する。 Of the left-eye image display period, the first half period is referred to as the first field, and the second half period is referred to as the second field. In the right-eye image display period, the first half period is referred to as a third field, and the second half period is referred to as a fourth field.
　第１フィールドは、右目用画像等、左目用画像とは異なる画像から、左目用画像へ切り替わっている期間である。また、第３フィールドは、左目用画像から右目用画像へ切り替わっている期間である。このため、第１フィールド及び第３フィールドは、左目用画像と右目用画像とが混在して表示されている期間である。 The first field is a period during which the image for the right eye is switched from the image different from the image for the left eye to the image for the left eye. The third field is a period during which the left-eye image is switched to the right-eye image. For this reason, the first field and the third field are periods in which the left-eye image and the right-eye image are displayed together.
　一方、第２フィールドは、左目用画像への切り替わり終了後の期間であり、左目用画像表示間で表示させる所望の画像である左目用画像が表示されている期間である。 On the other hand, the second field is a period after the end of switching to the left-eye image, and is a period in which the left-eye image that is a desired image to be displayed between the left-eye image displays is displayed.
　また、第４フィールドは、右目用画像への切り替わり終了後の期間であり、右目用画像表示間で表示させる所望の画像である右目用画像が表示されている期間である。 The fourth field is a period after the end of switching to the right-eye image, and is a period in which the right-eye image, which is a desired image to be displayed between the right-eye image displays, is displayed.
　すなわち、図１の（ａ）に示す第１フィールドでは、液晶パネルＬＣＰは、画像表示領域３の画素Ｐに、左目用画像を、順次、書き込んでいく。前フレームの右目用画像が画像表示領域３に書き込まれている場合、当該前フレームの右目用画像が、左目用画像に書き換えられていくことになる。 That is, in the first field shown in FIG. 1A, the liquid crystal panel LCP sequentially writes the left-eye images in the pixels P of the image display area 3. When the right-eye image of the previous frame is written in the image display area 3, the right-eye image of the previous frame is rewritten to the left-eye image.
　これにより、第１フィールド経過時、液晶パネルＬＣＰの画像表示領域３の全面には、左目用画像が表示されている状態となる。 Thus, when the first field has elapsed, the image for the left eye is displayed on the entire surface of the image display area 3 of the liquid crystal panel LCP.
　第２フィールドでは、液晶パネルＬＣＰは、第１フィールドで、画像表示領域３の全面に書き込まれた左目用画像を継続して表示する。 In the second field, the liquid crystal panel LCP continuously displays the left-eye image written on the entire surface of the image display area 3 in the first field.
　次に、第３フィールドでは、液晶パネルＬＣＰは、画像表示領域３の画素Ｐに、右目用画像を、順次、書き込んでいく。すなわち、液晶パネルＬＣＰは、画像表示領域３に表示されていた左目用画像を右目用画像に順次、書き換えていく。 Next, in the third field, the liquid crystal panel LCP sequentially writes images for the right eye into the pixels P in the image display area 3. That is, the liquid crystal panel LCP sequentially rewrites the left-eye image displayed in the image display area 3 to the right-eye image.
　これにより、第３フィールド経過時、液晶パネルＬＣＰの画像表示領域３の全面には、右目用画像が表示されている状態となる。 Thereby, when the third field has elapsed, the image for the right eye is displayed on the entire surface of the image display area 3 of the liquid crystal panel LCP.
　第４フィールドでは、液晶パネルＬＣＰは、第３フィールドで、画像表示領域３の全面に書き込まれた右目用画像を継続して表示する。 In the fourth field, the liquid crystal panel LCP continuously displays the image for the right eye written on the entire surface of the image display area 3 in the third field.
　次フレーム期間でも同様に、液晶パネルＬＣＰは、左目用画像表示期間の前半の期間である第１フィールドでは、左目用画像を順次書き込んでいき、後半の期間である第２フィールドでは左目用画像を継続して表示する。また、液晶パネルＬＣＰは、右目用画像表示期間の前半の期間である第３フィールドでは、右目用画像を順次書き込んでいき、後半の期間である第４フィールドでは右目用画像を継続して表示する。 Similarly, in the next frame period, the liquid crystal panel LCP sequentially writes the left-eye image in the first field, which is the first half of the left-eye image display period, and the left-eye image in the second field, which is the second half. Display continuously. Further, the liquid crystal panel LCP sequentially writes right-eye images in the third field, which is the first half of the right-eye image display period, and continuously displays the right-eye images in the fourth field, which is the second half. .
　このように、奇数番目のフィールド（第１及び第３フィールド）は、書き換え前の異なる画像（右目画像表示期間又は左目画像表示期間で表示すべき画像とは異なる画像）と、書き換え中の画像（右目画像表示期間又は左目画像表示期間で表示すべき画像）とが混在して液晶パネルＬＣＰの画像表示領域３に表示されている状態である。 As described above, the odd-numbered fields (first and third fields) include different images before rewriting (images different from images to be displayed in the right-eye image display period or the left-eye image display period) and images being rewritten ( The image to be displayed in the right-eye image display period or the left-eye image display period) and is displayed in the image display area 3 of the liquid crystal panel LCP.
　つまり、奇数番目のフィールドは、互いに異なる画像が、液晶パネルＬＣＰの画像表示領域３に表示されているフィールドであると表現することができる。 That is, the odd-numbered field can be expressed as a field in which different images are displayed in the image display area 3 of the liquid crystal panel LCP.
　一方、偶数番目のフィールド（第２及び第４フィールド）は、当該フィールドで表示すべき画像（右目画像表示期間又は左目画像表示期間で表示すべき画像）が、画像表示領域３に継続して表示されているフィールドであると表現することができる。 On the other hand, in the even-numbered field (second and fourth fields), the image to be displayed in the field (image to be displayed in the right-eye image display period or the left-eye image display period) is continuously displayed in the image display area 3. It can be expressed as a field that has been set.
　図１の（ｂ）（ｃ）に示すように、バックライトＢＬは、左目用画像表示用期間と、右目用画像表示用期間とのそれぞれで、消灯及び点灯している。 As shown in FIGS. 1B and 1C, the backlight BL is turned off and on in each of the left-eye image display period and the right-eye image display period.
　具体的には、バックライトＢＬは、奇数フィールド（第１フィールド、第３フィールド）期間中消灯し、偶数フィールド（第２フィールド、第４フィールド）期間中点灯する。 Specifically, the backlight BL is turned off during the odd field (first field, third field) and turned on during the even field (second field, fourth field).
　これにより、ユーザの左目及び右目のそれぞれに、逆側の画像を視認させることなく、立体画像を視認させるようにしている。 This allows the user's left eye and right eye to visually recognize a stereoscopic image without visually recognizing the opposite image.
　このように、本実施の形態では、バックライトＢＬは、デューティー（１フレーム期間における点灯時間の割合）が５０％となるように各フレームで点灯している。 Thus, in this embodiment, the backlight BL is lit in each frame so that the duty (ratio of lighting time in one frame period) is 50%.
　バックライトＢＬは、第１フィールドはロウ（Ｌ）、第２フィールドはハイ（Ｈ）、第３フィールドはロウ（Ｌ）、第４フィールドはハイ（Ｈ）であるバックライト駆動信号ＢＬＳをバックライト用信号生成部１３から取得する。 The backlight BL is a backlight driving signal BLS in which the first field is low (L), the second field is high (H), the third field is low (L), and the fourth field is high (H). Obtained from the signal generator 13.
　バックライトＢＬは、バックライト用信号生成部１３から取得したバックライト駆動信号ＢＬＳのロウ・ハイに対応して、第１フィールドで消灯、第２フィールドで点灯、第３フィールドで消灯、第４フィールドでは点灯する。バックライトＢＬは次フレームでも同様に動作する。 The backlight BL is turned off in the first field, turned on in the second field, turned off in the third field, and turned off in the fourth field, corresponding to the low / high of the backlight drive signal BLS acquired from the backlight signal generator 13. It lights up. The backlight BL operates similarly in the next frame.
　このように、バックライトＢＬは、第１及び第３フィールドで消灯している。これにより、左目用画像及び右目用画像が混在している画像を、ユーザに視認されることを抑制することができるので、ユーザに視認させる画像の表示品位が悪くなることを抑制することができる。 Thus, the backlight BL is turned off in the first and third fields. Thereby, since it can suppress that the image in which the image for left eyes and the image for right eyes are mixed is visually recognized by a user, it can suppress that the display quality of the image visually recognized by a user deteriorates. .
　図１の（ｄ）～（ｆ）に示すように、３Ｄメガネ２０は、少なくとも、異なる画像へ切り替わっている期間である奇数フィールド（第１及び第３フィールド）内の一部の期間で、液晶シャッタ２１・２２の両方の開閉状態の切替えを行っている。 As shown in (d) to (f) of FIG. 1, the 3D glasses 20 at least in a part of the odd-numbered field (first and third fields) during which switching to a different image is performed. The open / close state of both shutters 21 and 22 is switched.
　シャッタ制御部２３は、３Ｄメガネ用信号生成部１４から、３Ｄメガネ制御信号ＭＳを取得するとともに、図１の（ｄ）に示すように、左右画像識別信号ＬＲＳを取得する。 The shutter control unit 23 acquires the 3D glasses control signal MS from the 3D glasses signal generation unit 14 and also acquires the left and right image identification signal LRS as shown in FIG.
　本実施の形態では、左右画像識別信号ＬＲＳは、ハイ（Ｈ）で左目用画像表示期間であることを示し、ロウ（Ｌ）で右目用画像表示期間であることを示す。なお、左目用画像表示期間と、右目用画像表示期間とで、ハイとロウとが逆であってもよい。 In the present embodiment, the left and right image identification signal LRS indicates a left-eye image display period at high (H), and indicates a right-eye image display period at low (L). Note that high and low may be reversed between the left-eye image display period and the right-eye image display period.
　シャッタ制御部２３は、３Ｄメガネ用信号生成部１４から、３Ｄメガネ制御信号ＭＳ及び左右画像識別信号ＬＲＳを取得すると、図１の（ｅ）（ｆ）に示すように、左目用の液晶シャッタ駆動用信号ＬＳ、右目用の液晶シャッタ駆動用信号ＲＳを生成し、それぞれ、シャッタ駆動部２５・２４を介して、液晶シャッタ２２・２１を開閉駆動させる。 When the shutter control unit 23 acquires the 3D glasses control signal MS and the left and right image identification signal LRS from the 3D glasses signal generation unit 14, as shown in FIGS. 1E and 1F, the shutter control unit 23 drives the liquid crystal shutter for the left eye. Signal LS and right-eye liquid crystal shutter drive signal RS are generated, and liquid crystal shutters 22 and 21 are driven to open and close via shutter drive units 25 and 24, respectively.
　左目用シャッタ駆動信号ＬＳ及び右目用の液晶シャッタ駆動用信号ＲＳは、それぞれ、ロウ（Ｌ）で液晶シャッタ２２・２１を閉（遮光）状態とすることを示し、ハイ（Ｈ）で液晶シャッタ２２・２１を開（透過）状態とすることを示している。 The left-eye shutter drive signal LS and the right-eye liquid crystal shutter drive signal RS indicate that the liquid crystal shutters 22 and 21 are closed (light-shielded) at low (L), and the liquid crystal shutter 22 at high (H). This indicates that 21 is in an open (transmission) state.
　第１フィールド内に、液晶シャッタ２２・２１は、共に、閉状態→開状態→閉状態となるように駆動する。 In the first field, the liquid crystal shutters 22 and 21 are both driven so as to be in the closed state → the open state → the closed state.
　第２フィールドに、左目用の液晶シャッタ２２は、閉状態→開状態→閉状態となるように駆動する一方、右目用の液晶シャッタ２１は、第１フィールドから継続して第２フィールド中、閉状態を維持する。 In the second field, the liquid crystal shutter 22 for the left eye is driven so as to be in the closed state → the open state → the closed state, while the liquid crystal shutter 21 for the right eye is continuously closed from the first field during the second field. Maintain state.
　第３フィールド内に、液晶シャッタ２２・２１は、共に、閉状態→開状態→閉状態となるように駆動する。 In the third field, the liquid crystal shutters 22 and 21 are both driven so as to be in the closed state → the open state → the closed state.
　第４フィールドの期間内に、左目用の液晶シャッタ２２は、第３フィールドから継続して第４フィールド中、閉状態を維持する一方、右目用の液晶シャッタ２１は、閉状態→開状態→閉状態となるように駆動する。 Within the period of the fourth field, the liquid crystal shutter 22 for the left eye continues from the third field and maintains the closed state during the fourth field, while the liquid crystal shutter 21 for the right eye closes → open → closes. Drive to be in a state.
　３Ｄメガネ２０は、次フレームでも、同様に駆動する。 The 3D glasses 20 are driven in the same manner in the next frame.
　このように、３Ｄメガネ２０は、バックライトＢＬが点灯している偶数フィールド内では、左右用の液晶シャッタ２１・２２のうち、対応する画像が表示されている液晶シャッタ２１・２２が開状態となる。 In this way, in the 3D glasses 20, in the even field where the backlight BL is lit, the liquid crystal shutters 21 and 22 on which the corresponding images are displayed among the left and right liquid crystal shutters 21 and 22 are in the open state. Become.
　すなわち、左目用画像が表示されている第２フィールドでは、左目用の液晶シャッタ２２が開状態となり、右目用の液晶シャッタ２１は閉状態を維持している。これにより、ユーザに、左目用画像を、左目でのみ視認させることができる。 That is, in the second field in which the image for the left eye is displayed, the liquid crystal shutter 22 for the left eye is in an open state, and the liquid crystal shutter 21 for the right eye is maintained in a closed state. This allows the user to visually recognize the left-eye image only with the left eye.
　また、右目用画像が表示されている第４フィールドでは、右目用の液晶シャッタ２１が開状態となり、左目用の液晶シャッタ２２は閉状態を維持している。これにより、ユーザに、右目用の画像を、右目でのみ視認させることができる。 In the fourth field in which the right-eye image is displayed, the right-eye liquid crystal shutter 21 is open, and the left-eye liquid crystal shutter 22 is kept closed. Thereby, the user can visually recognize the image for the right eye only with the right eye.
　これにより、液晶パネルＬＣＰに表示されている画像を、ユーザに立体視させることができる。 This allows the user to stereoscopically view the image displayed on the liquid crystal panel LCP.
　一方、３Ｄメガネ２０は、バックライトＢＬが消灯している奇数（第１及び第３）フィールドでは、左右用の液晶シャッタ２１・２２の両方が開状態となる。 On the other hand, in the 3D glasses 20, in the odd (first and third) fields where the backlight BL is turned off, both the left and right liquid crystal shutters 21 and 22 are opened.
　奇数フィールドではバックライトＢＬが消灯しているので、液晶パネルＬＣＰに表示されている画像は、ユーザには視認されない。 In the odd field, since the backlight BL is turned off, the image displayed on the liquid crystal panel LCP is not visually recognized by the user.
　そして、この奇数フィールドで両方の液晶シャッタ２１・２２を開状態とすることで、単位時間（例えば１フレーム期間）あたりに、ユーザの目に多くの外光を取り込ませることができる。これにより、外光に起因するフリッカを低減することができる。 Then, by opening both the liquid crystal shutters 21 and 22 in this odd field, a large amount of external light can be taken into the user's eyes per unit time (for example, one frame period). Thereby, flicker caused by external light can be reduced.
　また、例えば、映像信号における１フレーム中の限られた短い期間であるブランキング期間に依存せず、液晶シャッタ２１・２２の両方を透過状態とすることができる。 Further, for example, both the liquid crystal shutters 21 and 22 can be in a transmissive state without depending on a blanking period which is a limited short period in one frame in the video signal.
　このため、ユーザの左目及び右目のそれぞれに、逆側の画像（右目用画像及び左目用画像）を視認させることなく、より、多くの外光を入射させることができ、フリッカを確実に低減することができる。 For this reason, more external light can be incident on each of the user's left eye and right eye without making the opposite-side images (right-eye image and left-eye image) visible, and flicker is reliably reduced. be able to.
　また、例えば、外光の点滅周期を検出するための装置も不要なので、コスト増大も防止することができる。 Also, for example, since an apparatus for detecting the blinking period of external light is not necessary, an increase in cost can be prevented.
　ここで、図４に示すように、左目用の画像表示期間を通して、左目用の液晶シャッタ２２のみを開状態とし、右目用の画像表示期間を通して右目用の液晶シャッタ２１のみを開状態とすることも考えられる。 Here, as shown in FIG. 4, only the left-eye liquid crystal shutter 22 is opened during the left-eye image display period, and only the right-eye liquid crystal shutter 21 is opened during the right-eye image display period. Is also possible.
　しかし、このように液晶シャッタ２１・２２の開閉駆動を行うと、開閉の周期が６０Ｈｚ程度となり、フリッカが見え易い周期となる。 However, when the liquid crystal shutters 21 and 22 are opened and closed in this way, the opening and closing cycle is about 60 Hz, and the flicker is easily visible.
　一方、立体画像表示システム１では、左目用の液晶シャッタ２２は、第１～第３フィールドのそれぞれで開状態となっている期間が、第１～第３フィールドのそれぞれの期間より短い。また、右目用の液晶シャッタ２１は、第１、第３、第４フィールドのそれぞれで透過状態となっている期間が、第１、第３、第４フィールドのそれぞれの期間より短い。 On the other hand, in the stereoscopic image display system 1, the period in which the left-eye liquid crystal shutter 22 is open in each of the first to third fields is shorter than each period of the first to third fields. Also, the right eye liquid crystal shutter 21 has a shorter transmission period in each of the first, third, and fourth fields than each of the first, third, and fourth fields.
　一例として、左目用の液晶シャッタ２１・２２が開状態となっている期間は、４．１ｍｓ以下である。 As an example, the period during which the left-eye liquid crystal shutters 21 and 22 are in the open state is 4.1 ms or less.
　このように、液晶シャッタ２１・２２の見かけ上の開閉周期の周波数が６０Ｈｚより高くなっている。 Thus, the apparent frequency of the open / close cycle of the liquid crystal shutters 21 and 22 is higher than 60 Hz.
　換言すると、１フレーム期間中に、液晶シャッタ２１・２２それぞれが開状態となっている期間（デューティー）は、それぞれ７５％より小さい。 In other words, the period (duty) in which each of the liquid crystal shutters 21 and 22 is open during one frame period is less than 75%.
　これによると、第１～第４フィールドのそれぞれより、高い周期で、液晶シャッタ２１・２２のそれぞれの閉開状態の切替えを行うこととなる。 According to this, the switching between the closed and open states of the liquid crystal shutters 21 and 22 is performed at a higher cycle than each of the first to fourth fields.
　このため、外光のうち、液晶シャッタ２１・２２の閉状態と開状態との切替え周期より、低い周波数の成分に起因するフリッカを防止することができる。また、外光のうち、一般的に、高い周波数の成分に起因するフリッカは人の目には感じ難い。このため、より、フリッカの低減効果を高めることができる。 For this reason, flicker caused by a component having a lower frequency than the switching period between the closed state and the open state of the liquid crystal shutters 21 and 22 can be prevented. In addition, flicker caused by high frequency components in outside light is generally difficult for human eyes to feel. For this reason, the flicker reduction effect can be further enhanced.
　＜変形例＞
　本発明の立体画像表示システム１の変形例について説明する。 <Modification>
A modification of the stereoscopic image display system 1 of the present invention will be described.
　駆動制御部１０は、図示しない外光検知部を有していてもよい。外光検知部としては、一般的な光センサを用いることができる。外光検知部は、液晶シャッタ２１・２２の周囲の外光の光量を検知し、外光の光量データを３Ｄメガネ用信号生成部１４へ出力する。３Ｄメガネ用信号生成部１４は、外光の光量データを加味して、３Ｄメガネ制御信号ＭＳ、及び左右画像識別信号ＬＲＳを生成し、シャッタ制御部２３へ出力する。 The drive control unit 10 may have an outside light detection unit (not shown). A general optical sensor can be used as the outside light detection unit. The external light detection unit detects the amount of external light around the liquid crystal shutters 21 and 22, and outputs external light amount data to the 3D glasses signal generation unit 14. The 3D glasses signal generator 14 generates a 3D glasses control signal MS and a left and right image identification signal LRS in consideration of the light quantity data of external light, and outputs them to the shutter controller 23.
　ユーザは、外光の光量が大きいときにフリッカの存在を感じ易い。外光の光量が大きいときに液晶シャッタ２１・２２の透過率を小さくするように、３Ｄメガネ制御信号ＭＳ及び左右画像識別信号ＬＲＳを生成することで、外光に起因するフリッカを低減することができる。 The user can easily feel the presence of flicker when the amount of external light is large. Flicker caused by external light can be reduced by generating the 3D glasses control signal MS and the left and right image identification signal LRS so that the transmittance of the liquid crystal shutters 21 and 22 is reduced when the amount of external light is large. it can.
　また、外光検知部は、３Ｄメガネ２０（シャッタ部）に設けることが好ましい。外光検知部をユーザの目の近傍である３Ｄメガネ２０に設けることで、実際にユーザの目に入る光を検知することができる。これにより、フリッカの低減効果を向上させることができる。 Moreover, it is preferable that the external light detection unit is provided in the 3D glasses 20 (shutter unit). By providing the external light detection unit in the 3D glasses 20 in the vicinity of the user's eyes, it is possible to detect light that actually enters the user's eyes. Thereby, the flicker reduction effect can be improved.
　この場合、外光の光量データに基づいて、液晶シャッタ駆動用信号ＲＳ・ＬＳを補正する補正値を生成するものとしてもよい。 In this case, a correction value for correcting the liquid crystal shutter drive signal RS / LS may be generated based on the light amount data of the external light.
　また、外光の光量データに応じて、液晶シャッタ２１・２２の透過状態（開状態）と遮光状態（閉状態）との切り替え周期（開閉周期）を変化させてもよい。 Further, the switching cycle (opening / closing cycle) between the transmission state (open state) and the light shielding state (closed state) of the liquid crystal shutters 21 and 22 may be changed according to the light amount data of the external light.
　液晶シャッタ２１・２２の開閉をするためには電力を要し、例えば３Ｄメガネ２０に設けられた電池から電力を供給される。 Electric power is required to open and close the liquid crystal shutters 21 and 22. For example, power is supplied from a battery provided in the 3D glasses 20.
　ここで、外光の光量が小さいときにはフリッカの存在は感じ難いため、開閉周期を低くしてもよい。そのため、外光の光量が小さいときには、例えば図４に示すように液晶シャッタ２１・２２の開閉周期を低くする。これにより、シャッタの開閉に要する消費電力を低減することができ、電池の消耗を抑えることができる。 Here, when the amount of external light is small, it is difficult to feel flicker, so the opening / closing cycle may be lowered. Therefore, when the amount of external light is small, for example, the opening / closing cycle of the liquid crystal shutters 21 and 22 is lowered as shown in FIG. Thereby, power consumption required for opening and closing the shutter can be reduced, and consumption of the battery can be suppressed.
　〔実施の形態２〕
　次に、図５を用いて、本発明の第２の実施の形態について説明する。なお、説明の便宜上、前記実施の形態１にて説明した図面と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。 [Embodiment 2]
Next, a second embodiment of the present invention will be described with reference to FIG. For convenience of explanation, members having the same functions as those in the drawings described in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.
　図５は、第２の実施形態に係る立体画像表示システム１の表示動作を説明するための図である。 FIG. 5 is a diagram for explaining a display operation of the stereoscopic image display system 1 according to the second embodiment.
　図５の（ａ）は立体画像表示システム１の動作状態の様子を表しており、（ｂ）はバックライトＢＬの動作状態を表しており、（ｃ）はバックライトＢＬへ出力されるバックライト駆動信号ＢＬＳを表している。 5A shows the state of the operation state of the stereoscopic image display system 1, FIG. 5B shows the operation state of the backlight BL, and FIG. 5C shows the backlight output to the backlight BL. The drive signal BLS is shown.
　図５の（ｄ）は左右画像識別信号ＬＲＳを表しており、（ｅ）は左目用の液晶シャッタ駆動用信号ＬＳと液晶シャッタ２２の駆動状態を表しており、（ｆ）は右目用の液晶シャッタ駆動用信号ＲＳと液晶シャッタ２１の駆動状態を表している。 5D shows the left and right image identification signal LRS, FIG. 5E shows the left-eye liquid crystal shutter driving signal LS and the driving state of the liquid crystal shutter 22, and FIG. 5F shows the right-eye liquid crystal. The shutter driving signal RS and the driving state of the liquid crystal shutter 21 are shown.
　図５の（ａ）～（ｄ）は、図１の（ａ）～（ｄ）と同様である。 (A) to (d) in FIG. 5 are the same as (a) to (d) in FIG.
　図５の（ｅ）（ｆ）に示すように、３Ｄメガネ２０の液晶シャッタ２１・２２は、隣接フィールドに跨って、開状態を維持している。 As shown in FIGS. 5E and 5F, the liquid crystal shutters 21 and 22 of the 3D glasses 20 maintain the open state across adjacent fields.
　第１フィールド内で、左目用の液晶シャッタ２２は閉状態→開状態となり、そのまま、第２フィールドへ開状態を維持する一方、右目用の液晶シャッタ２１は、閉状態→開状態→閉状態となるように駆動する。 In the first field, the left-eye liquid crystal shutter 22 changes from the closed state to the open state and maintains the open state in the second field, while the right-eye liquid crystal shutter 21 changes from the closed state to the open state to the closed state. Drive to be.
　第２フィールドでは、左目用の液晶シャッタ２２は、第１フィールドから継続して第２フィールド中、開状態を維持する一方、右目用の液晶シャッタ２１は、第１フィールドから継続して第２フィールド中、閉状態を維持する。 In the second field, the left-eye liquid crystal shutter 22 continues from the first field and remains open during the second field, while the right-eye liquid crystal shutter 21 continues from the first field in the second field. Maintain a closed state during.
　第３フィールドでは、左目用の液晶シャッタ２２は開状態→閉状態となる一方、右目用の液晶シャッタ２１は、閉状態→開状態となるように駆動する。 In the third field, the liquid crystal shutter 22 for the left eye is opened → closed, while the liquid crystal shutter 21 for the right eye is driven so as to be closed → open.
　第４フィールドでは、左目用の液晶シャッタ２２は、第３フィールドから継続して第４フィールド中、閉状態を維持する一方、右目用の液晶シャッタ２１は、第３フィールドから継続して第４フィールド中、開状態を維持する。 In the fourth field, the liquid crystal shutter 22 for the left eye continues from the third field and remains closed during the fourth field, while the liquid crystal shutter 21 for the right eye continues from the third field to the fourth field. Maintain an open state during.
　３Ｄメガネ２０は、次フレームでも、同様に駆動する。 The 3D glasses 20 are driven in the same manner in the next frame.
　このように、左目用の液晶シャッタ２２は、第１フィールドから、第３フィールドに跨って開状態を維持する。すなわち、左目用の液晶シャッタ２２は、左目用画像表示期間におけるバックライトＢＬ点灯期間である第２フィールドを含み、左目用画像表示期間におけるバックライトＢＬ消灯期間である第１フィールドから、次のバックライトＢＬ消灯期間である第３フィールドに跨って開状態を維持している。 Thus, the liquid crystal shutter 22 for the left eye maintains the open state from the first field to the third field. That is, the left-eye liquid crystal shutter 22 includes the second field that is the backlight BL lighting period in the left-eye image display period, and the next backlight from the first field that is the backlight BL extinguishing period in the left-eye image display period. The open state is maintained over the third field which is the light BL extinguishing period.
　また、右目用の液晶シャッタ２１は、第３フィールドから、次の立体画像のフレーム期間における第１フィールドに跨って開状態を維持している。すなわち、右目用の液晶シャッタ２１は、第１フィールドで一旦開閉し、さらに、右目用画像表示期間におけるバックライトＢＬ点灯期間である第４フィールドを含み、右目用画像表示期間におけるバックライトＢＬ消灯期間である第３フィールドから、次のバックライトＢＬ消灯期間である次フレームの第１フィールドに跨って開状態を維持している。 Also, the right-eye liquid crystal shutter 21 is kept open from the third field to the first field in the frame period of the next stereoscopic image. That is, the right-eye liquid crystal shutter 21 is once opened and closed in the first field, and further includes a fourth field that is the backlight BL lighting period in the right-eye image display period, and the backlight BL extinguishing period in the right-eye image display period. From the third field, the open state is maintained across the first field of the next frame, which is the next backlight BL extinguishing period.
　また、換言すると、液晶シャッタ２１・２２が連続して開状態となっている期間は、第１～第４サブフレームのうちの１サブフレームの期間の長さより長く、３サブフレームの期間より短い。 In other words, the period in which the liquid crystal shutters 21 and 22 are continuously open is longer than the period of one subframe of the first to fourth subframes and shorter than the period of three subframes. .
　このように、液晶シャッタ２１・２２を長時間、開状態とすることで、ユーザの目に入る光の周波数成分を分散させることができるので、フリッカの低減効果を高めることができる。 As described above, by opening the liquid crystal shutters 21 and 22 for a long time, it is possible to disperse the frequency components of the light entering the user's eyes, so that the flicker reduction effect can be enhanced.
　〔実施の形態３〕
　次に、図６を用いて、本発明の第３の実施の形態について説明する。なお、説明の便宜上、前記実施の形態１、２にて説明した図面と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。 [Embodiment 3]
Next, a third embodiment of the present invention will be described with reference to FIG. For convenience of explanation, members having the same functions as those in the drawings described in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.
　図６は、第３の実施形態に係る立体画像表示システム１の表示動作を説明するための図である。 FIG. 6 is a diagram for explaining the display operation of the stereoscopic image display system 1 according to the third embodiment.
　図６の（ａ）は立体画像表示システム１の動作状態の様子を表しており、（ｂ）はバックライトＢＬの動作状態を表しており、（ｃ）はバックライトＢＬへ出力されるバックライト駆動信号ＢＬＳを表している。 6A shows the operating state of the stereoscopic image display system 1, FIG. 6B shows the operating state of the backlight BL, and FIG. 6C shows the backlight output to the backlight BL. The drive signal BLS is shown.
　図６の（ｄ）は左右画像識別信号ＬＲＳを表しており、（ｅ）は左目用の液晶シャッタ駆動用信号ＬＳと液晶シャッタ２２の駆動状態を表しており、（ｆ）は右目用の液晶シャッタ駆動用信号ＲＳと液晶シャッタ２１の駆動状態を表している。 6D shows the left / right image identification signal LRS, FIG. 6E shows the left-eye liquid crystal shutter drive signal LS and the driving state of the liquid crystal shutter 22, and FIG. 6F shows the right-eye liquid crystal. The shutter driving signal RS and the driving state of the liquid crystal shutter 21 are shown.
　図６の（ａ）（ｃ）（ｄ）は、図１の（ａ）（ｃ）（ｄ）と同様である。 (A), (c), and (d) in FIG. 6 are the same as (a), (c), and (d) in FIG.
　図６の（ｂ）（ｃ）に示すように、バックライトＢＬの第１及び第３フィールドにおける消灯期間は、第１及び第３フィールドのそれぞれの期間より短い。すなわち、バックライトＢＬは、第１フィールド及び第３フィールドの期間経過前に、点灯を開始している。 As shown in FIGS. 6B and 6C, the extinguishing periods in the first and third fields of the backlight BL are shorter than the respective periods in the first and third fields. That is, the backlight BL starts to light before the first field and the third field have elapsed.
　一方、バックライトＢＬの一回当たりの点灯期間は、第２及び第４フィールドのそれぞれの期間より長くなっている。すなわち、バックライトＢＬは、第１及び第３フィールドの途中から点灯を開始し、第２及び第４フィールドのそれぞれの期間中、点灯を維持する。 On the other hand, the lighting period per time of the backlight BL is longer than the periods of the second and fourth fields. That is, the backlight BL starts lighting in the middle of the first and third fields, and keeps lighting during each period of the second and fourth fields.
　そして、図６の（ｅ）（ｆ）に示すように、左目用の液晶シャッタ２２は、バックライトＢＬの点灯期間に含まれる範囲で、第１フィールドの途中から閉状態から開状態へ駆動し、そのまま第２フィールドの終わりの方で、開状態から閉状態へと駆動する。 Then, as shown in FIGS. 6E and 6F, the left-eye liquid crystal shutter 22 is driven from the closed state to the open state from the middle of the first field within a range included in the lighting period of the backlight BL. Then, it is driven from the open state to the closed state at the end of the second field as it is.
　また、右目用の液晶シャッタ２１は、バックライトＢＬの点灯期間に含まれる範囲で、第３フィールドの途中から閉状態から開状態へ駆動し、そのまま第４フィールドの終わりの方で、開状態から閉状態へと駆動する。 Further, the right-eye liquid crystal shutter 21 is driven from the middle of the third field from the closed state to the open state within a range included in the lighting period of the backlight BL, and is moved from the open state toward the end of the fourth field. Drive to the closed state.
　このように、バックライトＢＬの、第１及び第３フィールドにおける消灯期間を、当該第１及び第３フィールドの期間より短くすることで、バックライトＢＬの点灯期間を長期間確保することができるので、輝度が高い鮮やかな立体画像をユーザに視認させることができる。 As described above, the lighting period of the backlight BL can be ensured for a long period of time by shortening the lighting period of the backlight BL in the first and third fields to be shorter than the period of the first and third fields. The user can visually recognize a vivid stereoscopic image with high luminance.
　第１フィールド及び第３フィールドにおけるバックライトＢＬの消灯期間の長さは、バックライトＢＬの消灯期間中に、液晶シャッタ２１・２２がそれぞれ、閉状態→開状態→閉状態へと駆動できる程度の長さであればよい。 The length of the backlight BL turn-off period in the first field and the third field is such that the liquid crystal shutters 21 and 22 can be driven from the closed state to the open state to the closed state, respectively, during the backlight BL turn-off period. Any length is acceptable.
　または、逆に、バックライトＢＬの、第２及び第４フィールドにおける点灯期間を、当該第２及び第４フィールド期間より短くするようにしてもよい。 Or, conversely, the lighting periods of the backlight BL in the second and fourth fields may be shorter than the second and fourth field periods.
　すなわち、第２及び第４フィールドの途中で、バックライトＢＬが点灯から消灯へと切り替わるようにしてもよい。 That is, the backlight BL may be switched from lighting to extinguishing in the middle of the second and fourth fields.
　これにより、バックライトＢＬの消灯期間中に、液晶シャッタ２１・２２の両方を透過状態とする期間を長期間確保することができ、より多くの外光を、ユーザの両目に入射させることができる。このため、高いフリッカ低減効果を得ることができる。 Thereby, it is possible to ensure a long period during which both the liquid crystal shutters 21 and 22 are in a transmissive state during the extinction period of the backlight BL, and it is possible to make more external light incident on both eyes of the user. . For this reason, a high flicker reduction effect can be obtained.
　一例として、バックライトＢＬが、第２フィールド及び第４フィールドのそれぞれで点灯する期間を、左目用画像表示期間及び右目画像表示期間のそれぞれの約１０％程度確保しておけば、左目用画像及び右目用画像のそれぞれをユーザに視認させることができるので、立体画像をユーザに視認させることができる。 As an example, if the backlight BL is lit for about 10% of the left-eye image display period and the right-eye image display period for each of the second field and the fourth field, Since each of the images for the right eye can be visually recognized by the user, the stereoscopic image can be visually recognized by the user.
　このように、立体画像表示システム１によると、バックライトＢＬの消灯期間及び点灯期間の設計の自由度が高いので、製品が要求される仕様や、想定される使用環境に応じて、最適な消灯又は点灯期間を設定することができる。 As described above, according to the stereoscopic image display system 1, since the degree of freedom in designing the backlight BL turn-off period and the turn-on period is high, the optimum turn-off according to the specifications required for the product and the assumed use environment. Or a lighting period can be set.
　このようにして、バックライトＢＬは、左目用画像表示期間及び右目用画像表示期間のそれぞれの前半である第１フィールド、第３フィールドの少なくとも一部期間で消灯し、左目用画像表示期間及び右目用画像表示期間のそれぞれの後半である第２フィールド及び第４フィールドの少なくとも一部期間で点灯していればよい。 In this way, the backlight BL is turned off in at least a part of the first field and the third field, which are the first half of the left-eye image display period and the right-eye image display period, and the left-eye image display period and the right-eye image display period. It suffices if the second field and the fourth field, which are the second half of each of the image display periods, are lit in at least a partial period.
　これにより、左目用画像と、右目用画像とが混在した画像を、ユーザに視認されることを抑制することができる。このため、ユーザに視認させる画像の表示品位が悪くなること抑制することができる。 Thereby, it is possible to suppress the user from visually recognizing an image in which the left-eye image and the right-eye image are mixed. For this reason, it can suppress that the display quality of the image visually recognized by a user deteriorates.
　〔実施の形態４〕
　次に、図７を用いて、本発明の第４の実施の形態について説明する。なお、説明の便宜上、前記実施の形態１～３にて説明した図面と同じ機能を有する部材については、同じ符号を付記し、その説明を省略する。 [Embodiment 4]
Next, a fourth embodiment of the present invention will be described with reference to FIG. For convenience of explanation, members having the same functions as those in the drawings described in the first to third embodiments are denoted by the same reference numerals and description thereof is omitted.
　図７は、第４の実施形態に係る立体画像表示システム１の表示動作を説明するための図である。 FIG. 7 is a diagram for explaining a display operation of the stereoscopic image display system 1 according to the fourth embodiment.
　図７の（ａ）は立体画像表示システム１の動作状態の様子を表しており、（ｂ）はバックライトＢＬの動作状態を表しており、（ｃ）はバックライトＢＬへ出力されるバックライト駆動信号ＢＬＳを表している。 7A shows the operating state of the stereoscopic image display system 1, FIG. 7B shows the operating state of the backlight BL, and FIG. 7C shows the backlight output to the backlight BL. The drive signal BLS is shown.
　図７の（ｄ）は左右画像識別信号ＬＲＳを表しており、（ｅ）は左目用の液晶シャッタ駆動用信号ＬＳと液晶シャッタ２２の駆動状態を表しており、（ｆ）は右目用の液晶シャッタ駆動用信号ＲＳと液晶シャッタ２１の駆動状態を表している。 7D shows the left and right image identification signal LRS, FIG. 7E shows the left-eye liquid crystal shutter drive signal LS and the driving state of the liquid crystal shutter 22, and FIG. 7F shows the right-eye liquid crystal. The shutter driving signal RS and the driving state of the liquid crystal shutter 21 are shown.
　図７の（ａ）～（ｄ）は、図１の（ａ）～（ｄ）と同様である。 (A) to (d) in FIG. 7 are the same as (a) to (d) in FIG.
　図７の（ｅ）（ｆ）に示すように、３Ｄメガネ２０の液晶シャッタ２１・２２は、１フィールド内で複数回、閉状態→開状態→閉状態となる駆動を繰り返している。 7 (e) and 7 (f), the liquid crystal shutters 21 and 22 of the 3D glasses 20 are repeatedly driven in a closed state → open state → closed state several times within one field.
　第１フィールド内に、液晶シャッタ２２・２１は、共に、閉状態→開状態→閉状態となる駆動を２回続けて行うように駆動する。 In the first field, both the liquid crystal shutters 22 and 21 are driven so as to continuously perform the drive of the closed state → the open state → the closed state twice.
　第２フィールドには、左目用の液晶シャッタ２２は、閉状態→開状態→閉状態となる駆動を２回続けて行うように駆動する一方、右目用の液晶シャッタ２１は、第１フィールドから継続して第２フィールド中、閉状態を維持する。 In the second field, the liquid crystal shutter 22 for the left eye is driven so as to continuously drive the closed state → the open state → the closed state twice, while the liquid crystal shutter 21 for the right eye continues from the first field. Then, the closed state is maintained during the second field.
　第３フィールド内には、液晶シャッタ２２・２１は、共に、閉状態→開状態→閉状態となる駆動を２回続けて行うように駆動する。 In the third field, both the liquid crystal shutters 22 and 21 are driven so as to continuously perform the drive of the closed state → the open state → the closed state twice.
　第４フィールドの期間内には、左目用の液晶シャッタ２２は、第３フィールドから継続して第４フィールド中、閉状態を維持する一方、右目用の液晶シャッタ２１は、閉状態→開状態→閉状態となる駆動を２回続けて行うように駆動する。 In the period of the fourth field, the liquid crystal shutter 22 for the left eye continues from the third field and maintains the closed state during the fourth field, while the liquid crystal shutter 21 for the right eye closes → open → It drives so that the drive which will be in a closed state may be performed twice continuously.
　３Ｄメガネ２０は、次フレームでも、同様に駆動する。 The 3D glasses 20 are driven in the same manner in the next frame.
　このように、液晶シャッタ２２は、第１～第３フィールドのそれぞれの期間内で、２回づつ、透過状態となる。また、液晶シャッタ２１は、第１、第３、第４フィールドのそれぞれの期間内で、２回づつ、透過状態となる。これにより、液晶シャッタ２・２２の透過状態と遮光状態との切り替えを、各フィールドの周期より高い周期で切替えることになるので、さらに、高いフリッカ低減効果を得ることができる。 Thus, the liquid crystal shutter 22 enters the transmission state twice in each period of the first to third fields. In addition, the liquid crystal shutter 21 is in a transmissive state twice each within the period of each of the first, third, and fourth fields. As a result, the switching between the transmission state and the light shielding state of the liquid crystal shutters 2 and 22 is switched at a period higher than the period of each field, so that a higher flicker reduction effect can be obtained.
　なお、１フィールド内で、液晶シャッタ２１・２２を閉状態→開状態→閉状態へと駆動する回数は２回に限定されるものではなく、３回以上であってもよい。液晶シャッタ２１・２２の液晶分子の駆動が制御できる程度であればよい。 In addition, the number of times that the liquid crystal shutters 21 and 22 are driven from the closed state to the open state to the closed state within one field is not limited to two times, and may be three times or more. It is sufficient that the driving of the liquid crystal molecules of the liquid crystal shutters 21 and 22 can be controlled.
　また、上記液晶表示装置が一つの立体画像を表示する立体画像表示期間は、第１目用画像表示用期間と、第２目用画像表示用期間とからなり、上記バックライトは、上記第１目用画像表示用期間と、上記第２目用画像表示用期間とのそれぞれで、消灯及び点灯することが好ましい。 The stereoscopic image display period in which the liquid crystal display device displays one stereoscopic image includes a first-eye image display period and a second-eye image display period, and the backlight includes the first image display period. It is preferable that the eye image display period and the second eye image display period are turned off and turned on.
　上記構成により、ユーザの第１目及び第２目のそれぞれに、逆側の画像を視認させることなく、立体画像を視認させることができる。 With the above configuration, the stereoscopic image can be visually recognized without allowing the first and second eyes of the user to visually recognize the opposite image.
　また、上記バックライトは、上記第１目用画像表示用期間及び第２目用画像表示用期間のそれぞれの前半の少なくとも一部期間で消灯し、上記第１目用画像表示用期間及び第２目用画像表示用期間のそれぞれの後半の少なくとも一部期間で点灯することが好ましい。 The backlight is turned off in at least a part of the first half of the first image display period and the second image display period, and the first image display period and the second image display period. It is preferable to light up at least a part of the second half of each of the eye image display periods.
　ここで、上記第１目用画像表示期間の前半の期間は、第２目用画像等第１目用画像とは異なる画像から第１目用画像へ切り替わっている期間である。また、上記第２目用画像表示期間の前半の期間は、第２目用画像から第１目用画像へ切り替わっている期間である。このため、それぞれの前半の期間は、第１目用画像と第２目用画像とが混在して表示されている期間である。 Here, the first half of the first eye image display period is a period during which the first eye image such as the second eye image is switched from an image different from the first eye image. The first half of the second eye image display period is a period during which the second eye image is switched to the first eye image. Therefore, each of the first half periods is a period in which the first eye image and the second eye image are displayed together.
　一方、上記第１目用画像表示期間及び第２目用画像表示期間の後半の期間は、画像の切り替わりの終了後の期間であり、それぞれの期間で表示させる所望の画像が表示されている期間である。 On the other hand, the latter half of the first image display period and the second image display period is a period after the end of image switching, and a period during which a desired image to be displayed in each period is displayed. It is.
　このため、上記構成によると、上記バックライトは、上記第１目用画像表示用期間及び第２目用画像表示用期間のそれぞれの前半の少なくとも一部期間で消灯し、上記第１目用画像表示用期間及び第２目用画像表示用期間のそれぞれの後半の少なくとも一部期間で点灯するので、上記第１及び第２目用画像が混在した画像を、ユーザに視認されることを抑制することができる。このため、ユーザに視認させる画像の表示品位が悪くなること抑制することができる。 Therefore, according to the above configuration, the backlight is turned off in at least a part of the first half of each of the first image display period and the second image display period, and the first image is displayed. Since the light is turned on in at least a part of the second half of each of the display period and the second image display period, it is possible to prevent the user from visually recognizing the image in which the first and second images are mixed. be able to. For this reason, it can suppress that the display quality of the image visually recognized by a user deteriorates.
　また、上記第１目用シャッタは、上記バックライトの消灯期間、及び、上記第１目用画像表示用期間における上記バックライトの点灯期間に透過状態となり、上記第２目用シャッタは、上記バックライトの消灯期間、及び、上記第２目用画像表示用期間における上記バックライトの点灯期間に透過状態となることが好ましい。 The first eye shutter is in a transmissive state during the backlight turn-off period and the backlight lighting period in the first eye image display period, and the second eye shutter is in the backlight state. It is preferable that the light is turned on during the light extinction period and the backlight illumination period in the second image display period.
　上記構成によると、第１目用画像が液晶表示装置に表示されている、上記第１目用画像表示用期間における上記バックライトの点灯期間に、上記第１目用シャッタは透過状態となるので、第１目用画像を、確実に、ユーザの第１目に入射させることができる。 According to the above configuration, the first-eye shutter is in a transmissive state during the backlight lighting period in the first-eye image display period in which the first-eye image is displayed on the liquid crystal display device. The first eye image can surely enter the first eye of the user.
　また、第２目用画像が液晶表示装置に表示されている、上記第２目用画像表示用期間における上記バックライトの点灯期間に、上記第２目用シャッタは透過状態となるので、第２目用画像を、確実に、ユーザの第２目に入射させることができる。 In addition, since the second eye shutter is in the transmission state during the backlight lighting period in the second eye image display period in which the second eye image is displayed on the liquid crystal display device, the second eye image is displayed. The eye image can be reliably incident on the second eye of the user.
　これにより、ユーザに、上記液晶表示装置に表示されている画像を、確実に立体視させることができる。 Thereby, the user can reliably stereoscopically view the image displayed on the liquid crystal display device.
　さらに、上記バックライトの消灯期間に、上記第１及び第２目用シャッタの両方が透過状態となるので、ユーザの第１目及び第２目のそれぞれに、逆側の画像を視認させることなく、より、多くの外光を入射させることができる。 Further, since both the first and second eye shutters are in a transmissive state during the backlight off period, the first image and the second eye of the user are not visually recognized on the opposite side. , More external light can be incident.
　このため、確実にユーザに液晶表示装置に表示されている画像を立体視させつつ、フリッカを確実に低減することができる。 For this reason, it is possible to reliably reduce flicker while allowing the user to stereoscopically view the image displayed on the liquid crystal display device.
　また、上記第１目用シャッタ及び上記第２目用シャッタが、上記バックライトの消灯期間で透過状態となる期間は、当該バックライトの消灯期間より短いことが好ましい。 In addition, it is preferable that the period in which the first shutter and the second shutter are in the transmission state during the backlight turn-off period is shorter than the backlight turn-off period.
　上記構成によると、上記バックライトの消灯期間より、速い周期で、上記第１及び第２目用シャッタのそれぞれを、遮光状態と透過状態との切替えを行うことになる。 According to the above configuration, the first and second shutters are switched between the light shielding state and the transmission state at a cycle faster than the backlight extinguishing period.
　このため、外光のうち、上記第１及び第２目用シャッタの遮光状態と透過状態との切替え周期より、低い周波数の成分に起因するフリッカを防止することができる。また、外光のうち、一般的に、高い周波数の成分に起因するフリッカは人の目には感じ難い。 For this reason, flicker caused by a component having a lower frequency than the switching period between the light shielding state and the transmission state of the first and second eye shutters can be prevented. In addition, flicker caused by high frequency components in outside light is generally difficult for human eyes to feel.
　このため、より、フリッカの低減効果を高めることができる。 Therefore, the flicker reduction effect can be further enhanced.
　また、上記第１目用シャッタ及び第２目用シャッタのそれぞれは、上記バックライトの消灯期間から、当該消灯期間とは異なる次のバックライト消灯期間に跨って透過状態を維持してもよい。 In addition, each of the first shutter and the second shutter may maintain the transmission state from the backlight extinction period to the next backlight extinction period different from the extinction period.
　上記構成によると、上記第１及び第２目用シャッタを長時間、透過状態とすることができる。このため、ユーザの目に入る光の周波数成分を分散させることができるので、フリッカの低減効果を高めることができる。 According to the above configuration, the first and second shutters can be in a transmissive state for a long time. For this reason, since the frequency component of the light entering the user's eyes can be dispersed, the flicker reduction effect can be enhanced.
　また、上記バックライトは、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの前半の期間中消灯しており、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの後半の期間中点灯していることが好ましい。 The backlight is turned off during the first half of each of the first image display period and the second image display period, and the first image display period and the second image display period. It is preferable that the light is turned on during the latter half of each of the two-eye image display periods.
　上記構成により、第１目用画像と第２目用画像との書き換え期間中はユーザに画像を視認させず、書き換えが終わってから第１目用画像又は第２目用画像をユーザに視認させることができる。このため、高品位の立体画像をユーザに立体視させることができる。 With the above configuration, the user does not visually recognize the image during the rewriting period of the first eye image and the second eye image, and allows the user to visually recognize the first eye image or the second eye image after the rewriting is completed. be able to. For this reason, the user can stereoscopically view a high-quality stereoscopic image.
　また、上記バックライトの、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの前半の期間における消灯期間は、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの前半の期間より短くてもよい。 Further, the extinguishing period of the backlight in the first half period of each of the first eye image display period and the second eye image display period is the first eye image display period and the second eye display period. The period may be shorter than the first half of each eye image display period.
　上記構成によると、バックライトの点灯期間を長期間確保することができるので、輝度が高い鮮やかな立体画像をユーザに視認させることができる。 According to the above configuration, the backlight lighting period can be ensured for a long period of time, so that the user can visually recognize a vivid stereoscopic image with high luminance.
　また、上記バックライトの上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの後半の期間における点灯期間は、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの後半の期間より短くてもよい。 The lighting periods of the backlight in the latter half of each of the first-eye image display period and the second-eye image display period are the first-eye image display period and the second-eye image display period. The image display period may be shorter than the latter half of each period.
　上記構成により、バックライトの消灯期間中に、上記第１及び第２目用シャッタの両方を透過状態とする期間を長期間確保することができ、より多くの外光を、ユーザの第１及び第２目に入射させることができる。このため、高いフリッカ低減効果を得ることができる。 With the above-described configuration, it is possible to ensure a long period during which both the first and second eye shutters are in a transmissive state during the backlight extinguishing period, and more external light is transmitted to the user's first and second light sources. It can be made incident on the second eye. For this reason, a high flicker reduction effect can be obtained.
　また、上記第１目用シャッタは、上記バックライトの消灯期間、及び上記第１目用画像表示用期間における上記バックライトの点灯期間中に複数回、透過状態となり、
　上記第２目用シャッタは、上記バックライトの消灯期間、及び上記第２目用画像表示用期間における上記バックライトの点灯期間中に複数回、透過状態となってもよい。上記構成によると、上記第１及び第２目用シャッタの透過状態と遮光状態とを、高い周期で切替えることになるので、さらに、高いフリッカ低減効果を得ることができる。 In addition, the first eye shutter is in a transmission state a plurality of times during the backlight turning-off period and the backlight lighting period in the first eye image display period.
The second eye shutter may be in a transmissive state a plurality of times during the backlight turn-off period and the backlight lighting period in the second eye image display period. According to the above configuration, since the transmission state and the light shielding state of the first and second shutters are switched at a high cycle, a further high flicker reduction effect can be obtained.
　また、外光の光量を検知する外光検知部と、上記第１目用シャッタおよび上記第２目用シャッタの少なくとも何れか一方の透過光量を変化させるシャッタ制御部とを有しており、上記シャッタ制御部は、上記外光検知部が検知した外光の光量に応じて、上記第１目用シャッタおよび上記第２目用シャッタの少なくとも何れか一方の、上記透過状態における透過光量を変化させてもよい。 An external light detection unit that detects the amount of external light; and a shutter control unit that changes a transmitted light amount of at least one of the first eye shutter and the second eye shutter. The shutter control unit changes the amount of transmitted light in the transmission state of at least one of the first eye shutter and the second eye shutter according to the amount of external light detected by the external light detection unit. May be.
　上記の構成により、外光の光量に応じて第１目用シャッタまたは第２目用シャッタの透過光量を変化させることができる。 With the above configuration, the transmitted light amount of the first eye shutter or the second eye shutter can be changed in accordance with the amount of external light.
　例えば、外光の光量が大きいときには、第１目用シャッタまたは第２目用シャッタの透過光量を小さすることで、ユーザに対してフリッカを感じ難くすることができる。 For example, when the amount of external light is large, it is possible to make it difficult for the user to feel flicker by reducing the amount of light transmitted through the first shutter or the second shutter.
　また、上記第１目用シャッタおよび上記第２目用シャッタは、シャッタ部に配されており、上記シャッタ部は上記外光検知部を備えていてもよい。 The first eye shutter and the second eye shutter may be arranged in a shutter portion, and the shutter portion may include the external light detection portion.
　上記の構成により、外光検知部はユーザの近くに設けられることとなり、実際にユーザの目に入射する光量を検知することができる。これにより、より正確に、ユーザの目に入射する光量を検知することができ、よりユーザに対してフリッカを感じ難くすることができる。 With the above configuration, the external light detection unit is provided near the user, and the amount of light that is actually incident on the user's eyes can be detected. As a result, the amount of light incident on the user's eyes can be detected more accurately, and flicker can be made harder for the user.
　また、上記第１用シャッタおよび上記第２目用シャッタは、上記透過状態と遮光状態とを交互に切り替えられ、上記外光検知部が検知した外光の光量に応じて、上記第１目用シャッタおよび上記第２目用シャッタの少なくとも何れか一方の、上記透過状態と上記遮光状態との切り替え周期を変化させてもよい。 The first shutter and the second shutter can be switched between the transmission state and the light shielding state alternately, and the first shutter is switched according to the amount of external light detected by the external light detection unit. The switching cycle between the transmission state and the light shielding state of at least one of the shutter and the second shutter may be changed.
　上記の構成により、外光の光量に応じて上記第１用シャッタまたは上記第２目用シャッタの開閉周期を変化させることができる。外光の光量が小さいときには開閉周期を低くしてもフリッカの影響は小さくなる。そのため、外光の光量が小さいときには開閉周期を低くし、シャッタの開閉に要する消費電力を低減することができる。これにより、シャッタの開閉に必要な電池の消耗を抑えることができる。 With the above configuration, the opening / closing cycle of the first shutter or the second shutter can be changed according to the amount of external light. When the amount of external light is small, the effect of flicker is reduced even if the opening / closing cycle is lowered. Therefore, when the amount of external light is small, the opening / closing cycle can be lowered, and the power consumption required for opening / closing the shutter can be reduced. Thereby, the consumption of the battery required for opening and closing the shutter can be suppressed.
　本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。 The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.
　本発明は、立体画像の表示が要求される画像表示装置に広く適用することができる。 The present invention can be widely applied to image display devices that are required to display stereoscopic images.
　１　　立体画像表示システム
　２　　液晶表示装置
　３　　画像表示領域
　１０　駆動制御部
　１１　画像信号生成部
　１２　液晶パネル用信号生成部
　１３　バックライト用信号生成部
　１４　３Ｄメガネ用信号生成部
　２０　３Ｄメガネ（シャッタ部）
　２１　液晶シャッタ（第２目用シャッタ、第１目用シャッタ）
　２２　液晶シャッタ（第１目用シャッタ、第２目用シャッタ）
　２３　シャッタ制御部
　２４　シャッタ駆動部
　２４・２５　シャッタ駆動部
　ＢＬ　バックライト
　ＧＤ　ゲートドライバ
　ＳＤ　ソースドライバ
　ＬＣＰ　液晶パネル
　Ｐ　画素 DESCRIPTION OF SYMBOLS 1 Stereoscopic image display system 2 Liquid crystal display device 3 Image display area 10 Drive control part 11 Image signal generation part 12 Signal generation part for liquid crystal panels 13 Signal generation part for backlight 14 Signal generation part for 3D glasses 20 3D glasses (shutter part)
21 Liquid crystal shutter (second eye shutter, first eye shutter)
22 Liquid crystal shutter (first eye shutter, second eye shutter)
23 Shutter Control Unit 24 Shutter Drive Unit 24/25 Shutter Drive Unit BL Backlight GD Gate Driver SD Source Driver LCP Liquid Crystal Panel P Pixel

Claims (13)

  1. 　第１目用画像と、第２目用画像とを順次、書き換えて、一つの立体画像を表示する液晶表示装置と、
    　上記液晶表示装置が上記第１目用画像を表示する際に透過状態とする第１目用シャッタと、上記液晶表示装置が上記第２目用画像を表示する際に透過状態とする第２目用シャッタとを備え、
    　さらに、上記液晶表示装置はバックライトを備え、
    　上記バックライトは、上記液晶表示装置の、上記第１目用画像から第２目用画像への書き換え期間のうち、少なくとも一部の期間で消灯し、
    　上記第１目用シャッタと、上記第２目用シャッタとの両方は、上記バックライトの消灯期間に透過状態となることを特徴とする立体画像表示システム。     A liquid crystal display device that sequentially rewrites the first-eye image and the second-eye image to display one stereoscopic image;
    A first eye shutter that is in a transmissive state when the liquid crystal display device displays the first eye image, and a second eye that is in a transmissive state when the liquid crystal display device displays the second eye image. And a shutter for
    Furthermore, the liquid crystal display device includes a backlight,
    The backlight is turned off during at least a part of the rewriting period from the first eye image to the second eye image of the liquid crystal display device,
    The stereoscopic image display system, wherein both the first eye shutter and the second eye shutter are in a transmissive state during the backlight extinction period.
  2. 　上記液晶表示装置が一つの立体画像を表示する立体画像表示期間は、第１目用画像表示用期間と、第２目用画像表示用期間とからなり、
    　上記バックライトは、上記第１目用画像表示用期間と、上記第２目用画像表示用期間とのそれぞれで、消灯及び点灯することを特徴とする請求項１に記載の立体画像表示システム。     The stereoscopic image display period in which the liquid crystal display device displays one stereoscopic image includes a first-eye image display period and a second-eye image display period.
    2. The stereoscopic image display system according to claim 1, wherein the backlight is turned off and on in each of the first eye image display period and the second eye image display period.
  3. 　上記バックライトは、上記第１目用画像表示用期間及び第２目用画像表示用期間のそれぞれの前半の少なくとも一部期間で消灯し、上記第１目用画像表示用期間及び第２目用画像表示用期間のそれぞれの後半の少なくとも一部期間で点灯することを特徴とする請求項２に記載の立体画像表示システム。 The backlight is turned off during at least a part of the first half of each of the first image display period and the second image display period, and the first image display period and the second eye display period. The stereoscopic image display system according to claim 2, wherein the three-dimensional image display system is lit in at least a partial period of each latter half of the image display period.
  4. 　上記第１目用シャッタは、上記バックライトの消灯期間、及び、上記第１目用画像表示用期間における上記バックライトの点灯期間に透過状態となり、
    　上記第２目用シャッタは、上記バックライトの消灯期間、及び、上記第２目用画像表示用期間における上記バックライトの点灯期間に透過状態となることを特徴とする請求項２又は３に記載の立体画像表示システム。     The first eye shutter is in a transmissive state during the backlight turning-off period and the backlight lighting period in the first eye image display period.
    The said 2nd shutter is a permeation | transmission state in the light extinction period of the said backlight, and the lighting period of the said backlight in the said 2nd image display period. 3D image display system.
  5. 　上記第１目用シャッタ及び上記第２目用シャッタが、上記バックライトの消灯期間で透過状態となる期間は、当該バックライトの消灯期間より短いことを特徴とする請求項４に記載の立体画像表示システム。 5. The stereoscopic image according to claim 4, wherein a period in which the first shutter and the second shutter are in a transmission state during the backlight turn-off period is shorter than the backlight turn-off period. Display system.
  6. 　上記第１目用シャッタ及び第２目用シャッタのそれぞれは、上記バックライトの消灯期間から、当該消灯期間とは異なる次のバックライト消灯期間に跨って透過状態を維持することを特徴とする請求項４に記載の立体画像表示システム。 Each of the first-eye shutter and the second-eye shutter maintains a transmission state from the backlight extinction period to the next backlight extinction period different from the extinction period. Item 5. The stereoscopic image display system according to Item 4.
  7. 　上記バックライトは、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの前半の期間中消灯しており、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの後半の期間中点灯していることを特徴とする請求項２～６の何れか１項に記載の立体画像表示システム。 The backlight is turned off during the first half of each of the first image display period and the second image display period, and the first image display period and the second eye display period. The three-dimensional image display system according to any one of claims 2 to 6, wherein the three-dimensional image display system is lit during the latter half of each of the image display periods.
  8. 　上記バックライトの、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの前半の期間における消灯期間は、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの前半の期間より短いことを特徴とする請求項２～６の何れか１項に記載の立体画像表示システム。 The extinction period of the backlight in the first half of each of the first eye image display period and the second eye image display period is the first image display period and the second eye display period. The three-dimensional image display system according to any one of claims 2 to 6, wherein the three-dimensional image display system is shorter than the first half of each of the image display periods.
  9. 　上記バックライトの上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの後半の期間における点灯期間は、上記第１目用画像表示用期間及び上記第２目用画像表示用期間のそれぞれの後半の期間より短いことを特徴とする請求項２～６の何れか１項に記載の立体画像表示システム。 The lighting periods of the backlight in the latter half of the first eye image display period and the second eye image display period are the first eye image display period and the second eye image, respectively. The stereoscopic image display system according to any one of claims 2 to 6, wherein the stereoscopic image display system is shorter than each of the latter half of the display period.
  10. 　上記第１目用シャッタは、上記バックライトの消灯期間、及び上記第１目用画像表示用期間における上記バックライトの点灯期間中に複数回、透過状態となり、
    　上記第２目用シャッタは、上記バックライトの消灯期間、及び上記第２目用画像表示用期間における上記バックライトの点灯期間中に複数回、透過状態となることを特徴とする請求項４に記載の立体画像表示システム。     The first eye shutter is in a transmissive state a plurality of times during the backlight turn-off period and the backlight lighting period in the first eye image display period.
    5. The second eye shutter is in a transmissive state a plurality of times during the backlight turn-off period and the backlight lighting period in the second eye image display period. The stereoscopic image display system described.
  11. 　外光の光量を検知する外光検知部と、
    　上記第１目用シャッタおよび上記第２目用シャッタの少なくとも何れか一方の透過光量を変化させるシャッタ制御部とを有しており、
    　上記シャッタ制御部は、上記外光検知部が検知した外光の光量に応じて、上記第１目用シャッタおよび上記第２目用シャッタの少なくとも何れか一方の、上記透過状態における透過光量を変化させることを特徴とする請求項１～１０の何れか１項に記載の立体画像表示システム。     An external light detector for detecting the amount of external light;
    A shutter control unit that changes the amount of transmitted light of at least one of the first eye shutter and the second eye shutter;
    The shutter control unit changes the transmitted light amount in the transmission state of at least one of the first eye shutter and the second eye shutter according to the amount of external light detected by the external light detection unit. The three-dimensional image display system according to any one of claims 1 to 10, wherein:
  12. 　上記第１目用シャッタおよび上記第２目用シャッタは、シャッタ部に配されており、
    　上記シャッタ部は上記外光検知部を備えていることを特徴とする請求項１１に記載の立体画像表示システム。     The first eye shutter and the second eye shutter are arranged in a shutter portion,
    The stereoscopic image display system according to claim 11, wherein the shutter unit includes the external light detection unit.
  13. 　上記第１目用シャッタおよび上記第２目用シャッタは、上記透過状態と遮光状態とを交互に切り替えられ、
    　上記外光検知部が検知した外光の光量に応じて、上記第１目用シャッタおよび上記第２目用シャッタの少なくとも何れか一方の、上記透過状態と上記遮光状態との切り替え周期を変化させることを特徴とする請求項１１または１２に記載の立体画像表示システム。     The first-eye shutter and the second-eye shutter can be alternately switched between the transmission state and the light-shielding state,
    In accordance with the amount of external light detected by the external light detection unit, the switching cycle between the transmission state and the light shielding state of at least one of the first eye shutter and the second eye shutter is changed. The three-dimensional image display system according to claim 11 or 12,
PCT/JP2012/060778 2011-04-27 2012-04-20 Stereoscopic image display system WO2012147663A1 (en)

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