WO2008068920A1 - 階調電圧補正システム、及びこれを用いた表示装置 - Google Patents
階調電圧補正システム、及びこれを用いた表示装置 Download PDFInfo
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- WO2008068920A1 WO2008068920A1 PCT/JP2007/063536 JP2007063536W WO2008068920A1 WO 2008068920 A1 WO2008068920 A1 WO 2008068920A1 JP 2007063536 W JP2007063536 W JP 2007063536W WO 2008068920 A1 WO2008068920 A1 WO 2008068920A1
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- Prior art keywords
- gradation voltage
- light
- liquid crystal
- display device
- correction
- Prior art date
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0285—Improving the quality of display appearance using tables for spatial correction of display data
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
-
- 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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
Definitions
- the present invention relates to a gradation voltage correction system that corrects a gradation voltage according to information to be displayed, particularly a gradation voltage correction system used in a non-light-emitting display device configured to be capable of color display, and
- the present invention relates to a display device using the same.
- liquid crystal display devices have been widely used in liquid crystal televisions, monitors, mobile phones, and the like as flat panel displays having features such as thinness and light weight compared to conventional cathode ray tubes.
- Such a liquid crystal display device includes a backlight device that emits light, and a liquid crystal panel that displays a desired image by acting as a shutter for light of a light source provided in the knock light device. Speak.
- an edge light type or a direct type is provided in which a linear light source having cold cathode tube or hot cathode tube force is disposed on the side or below the liquid crystal panel.
- the above-mentioned cold cathode tubes and the like contained mercury, and it was difficult to recycle the discarded cold cathode tubes. Therefore, a backlight device using a light emitting diode (LED) that does not use mercury as a light source and a liquid crystal display device using the backlight device have been proposed (for example, see Japanese Patent Application Laid-Open No. 2004-21147;).
- the above conventional liquid crystal display device there are provided three-color light emitting diodes that emit red (R), green (G), and blue (B) light, and these three colors are mixed. To obtain white light.
- a sensor for detecting light from the light emitting diodes is installed, and the light quantity of each of the RGB light emitting diodes is adjusted based on the detection result, so that the corresponding light emitting diodes can be detected. It was possible to suppress secular changes in luminance and chromaticity.
- the light sources such as the cold cathode tubes and the light emitting diodes as described above are deteriorated over time.
- the chromaticity of the illumination light may change due to factors such as the initial lighting characteristics. Specifically, for example, in a cold cathode tube, mercury enclosed inside solidifies according to the usage (lighting) time, and the vapor pressure of the mercury decreases, so that a chromaticity change occurs in the illumination light. .
- a light emitting chip is generally protected by providing a package made of a transparent synthetic resin such as silicon resin or nylon resin on the light emitting surface side of the light emitting chip.
- the synthetic resin as described above is liable to cause deterioration over time such as yellowing due to the influence of heat from the light emitting chip.
- the package is colored due to aging, and a chromaticity change occurs in the illumination light.
- the white light emitting diode is composed of, for example, a blue light emitting diode and a yellow fluorescent material or a green and red fluorescent material provided on the surface of the light emitting chip of the light emitting diode. A change in chromaticity also occurred in the illumination light due to aging that occurred in fluorescent materials that were not only colored.
- the amount of current supplied to each of the RGB light emitting diodes is increased or decreased based on the detection result of the sensor, thereby adjusting the light amount of the corresponding light emitting diode, thereby illuminating. It was supposed that the chromaticity change of light could be suppressed. However, depending on the degree of coloring in the above-mentioned yellowing or other non-cage, the chromaticity change of the illumination light cannot be sufficiently suppressed only by increasing or decreasing the supply current value to each RGB light emitting diode. In some cases, this conventional liquid crystal display device cannot prevent deterioration in display quality.
- the present invention provides a gradation voltage correction system capable of preventing display quality from being deteriorated even when chromaticity change occurs in illumination light having a light source power, and for
- the purpose is to provide a V-shaped display device.
- a gradation voltage correction system is provided with red, green, and blue pixels and uses illumination light from a light source to store information in pixel units.
- a gradation voltage correction system for correcting gradation voltages supplied to a plurality of the pixels,
- a chromaticity change acquisition unit for acquiring a change in chromaticity of the illumination light
- a correction determination unit that determines a correction value of the gradation voltage for each color of the red, green, and blue pixels based on an acquisition result from the chromaticity change acquisition unit;
- a gradation voltage output unit that outputs the correction value of the gradation voltage from the correction determination unit to the display device side.
- a chromaticity change acquisition unit for acquiring a change in chromaticity of illumination light with a light source power is provided and acquired by the chromaticity change acquisition unit. Based on the change in chromaticity of the illumination light, a correction determination unit is provided that determines a correction value of the gradation voltage for each color of the red, green, and blue pixels. Also, a gradation voltage output unit is provided for outputting the correction value of the gradation voltage determined by the correction determination unit to the display device side.
- the correction determination unit cancels the chromaticity change of the illumination light so that the red, green, and blue colors It is possible to determine an appropriate gradation voltage correction value for each pixel color and output it to the display device via the gradation voltage output section. As a result, unlike the conventional example, it is possible to prevent the display quality from deteriorating even when the chromaticity change occurs in the illumination light of the light source power, regardless of the emission color or type of the light source.
- a color sensor that detects chromaticity of the illumination light may be used for the chromaticity change acquisition unit.
- the correction determination unit can grasp the actual measurement value of the change in chromaticity of the illumination light, can determine the correction value of the gradation voltage with high accuracy, and the display quality is deteriorated. You Can be surely prevented.
- the color sensor is installed in a place other than an effective display area of a display unit provided in the display device.
- the installation of the color sensor can surely prevent the luminance and display quality from being lowered.
- the chromaticity change acquisition unit may use a timer for measuring a lighting time of the light source.
- the timer measures an accumulated time obtained by integrating the lighting time of the light source, and an elapsed time from the lighting start time when the light source is turned on. Is preferably measured.
- a temperature sensor that detects an ambient temperature of the light source may be used for the chromaticity change acquisition unit.
- the correction determination unit includes a lookup table in which an acquisition result from the chromaticity change acquisition unit and a correction value of the gradation voltage are associated with each other. Is preferred to be used! /.
- the correction determining unit can immediately determine the correction value of the gradation voltage, and even when the chromaticity change occurs in the illumination light, it is possible to immediately prevent the display quality from being deteriorated.
- a display device of the present invention is characterized by using the above-described grayscale voltage correction system.
- a gradation voltage correction system that can prevent deterioration in display quality even when chromaticity change occurs in illumination light having a light source power is used.
- a display device having excellent display performance can be easily configured.
- a liquid crystal panel used for a display unit for displaying information is provided, and
- the transmittance of the illumination light may be changed on a pixel basis in accordance with a correction value of the gradation voltage from the gradation voltage output unit.
- a liquid crystal display device having excellent display performance in which the display quality is prevented from being lowered can be easily configured even when chromaticity change occurs in the illumination light having the light source power.
- a gradation voltage correction system that can prevent display quality from deteriorating, and a display device using the same Can be provided.
- FIG. 1 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to a first embodiment of the present invention.
- FIG. 2 is a plan view showing a configuration of main parts of the backlight device shown in FIG.
- Fig. 3 is a diagram for explaining a main configuration of the gradation voltage correction system and the liquid crystal panel shown in Fig. 1.
- FIG. 4 is a graph showing the effect of the gradation voltage correction system.
- A is the input gradation and the output voltage to each RGB pixel when the gradation voltage correction system does not correct the gradation voltage.
- B is a graph showing the relationship between the input gradation and the output voltage to each RGB pixel when the gradation voltage correction system corrects the gradation voltage.
- FIG. 5 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to a second embodiment of the present invention.
- FIG. 6 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to a third embodiment of the present invention.
- FIG. 7 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to a fourth embodiment of the present invention.
- FIG. 8 is a diagram for explaining the main configuration of the gradation voltage correction system and the liquid crystal panel shown in FIG. It is.
- FIG. 9 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to a fifth embodiment of the present invention.
- FIG. 10 is a diagram for explaining a main configuration of the gradation voltage correction system and the liquid crystal panel shown in FIG. 9.
- FIG. 1 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to the first embodiment of the present invention
- FIG. 2 is a plan view showing a main part configuration of the backlight device shown in FIG. FIG. 1 and 2, in the liquid crystal display device 1 of the present embodiment, the knock light device 2 and the liquid crystal panel 3 as a display unit for displaying information while being irradiated with light from the backlight device 2;
- the backlight device 2 and the liquid crystal panel 3 are integrated as a transmissive liquid crystal display device 1.
- the backlight device 2 is provided on the non-liquid crystal panel 3 side of the light guide plate 5 and the light guide plate 5 into which light from each of the plurality of light emitting diodes 4 is introduced.
- the reflection sheet 6 is provided, and the planar illumination light is irradiated from the light guide plate 5 to the liquid crystal panel 3 side.
- the knocklight device 2 as shown in FIG. 2, the plurality of light-emitting diodes 4 are formed on the left and right regions of the light-emitting diodes 4 set on the left and right sides of the light guide plate 5, respectively. Distributed in the installation area.
- each of the plurality of light emitting diodes 4 for example, a white light emitting diode that emits white light is used.
- the number, type, and size of the light-emitting diodes 4 are selected according to the size of the liquid crystal panel 3 and the display performance such as brightness and display quality required for the liquid crystal panel 3.
- a power LED with a power consumption of about 1 W or a chip LED with a power consumption of about 70 mW is appropriately used.
- liquid crystal display device 1 for example, a polarizing sheet 7, a prism (light collecting) sheet 8, and a diffusion sheet 9 are installed between the liquid crystal panel 3 and the light guide plate 5, and these optical sheets
- a polarizing sheet 7, a prism (light collecting) sheet 8, and a diffusion sheet 9 are installed between the liquid crystal panel 3 and the light guide plate 5, and these optical sheets
- a drive control circuit 11 is interposed via a signal line (source line) and control line (gate line) force SFPC (Flex3 ⁇ 4le Printed Circuit) 10 described later included in the liquid crystal panel 3. It is connected to the.
- the drive control circuit 11 performs drive control in units of pixels on the signal lines and the control lines.
- a lighting drive circuit 12 that drives a plurality of light-emitting diodes 4 is installed in the vicinity of the drive control circuit 11.
- the lighting drive circuit 12 is configured to drive the light emitting diode 4 to light using, for example, PWM dimming.
- the light guide plate 5 for example, a synthetic resin such as transparent acrylic resin is used.
- the light guide plate 5 has a rectangular cross section, and the left side surface and the right side surface in FIG. 2 function as introduction surfaces. That is, in the light guide plate 5, the light of each of the plurality of light emitting diodes 4 installed in the left region and the right region is introduced into the left side surface and the right side surface, respectively.
- the light of the light emitting diode 4 introduced into the inside from the left side surface is guided to the right side surface side, and the light emitting surface force disposed so as to face the diffusion sheet 9 by the reflection sheet 6 also has the liquid crystal panel 3.
- the light is appropriately emitted as illumination light.
- light from the light emitting diode 4 introduced into the right side surface force is appropriately emitted as illumination light from the light emitting surface toward the liquid crystal panel 3 by the reflection sheet 6 while being guided to the left side surface side.
- the light emitting diodes 4, the light guide plate 5, and the reflection sheet 6 in the left and right regions are accommodated in a housing (not shown), and light from each light emitting diode 4 is transmitted to the outside. With light leakage prevented as much as possible, it can be efficiently introduced from the corresponding left side or right side to the inside of the light guide plate 5 directly or indirectly through a reflector. . Thereby, in the knocklight device 2, the light utilization efficiency of each light emitting diode 4 can be easily improved, and the brightness of the illumination light can be easily increased.
- a color sensor 13 is provided on the lower side surface of the light guide plate 5 in FIG.
- the color sensor 13 is included in the gradation voltage correction system of the present embodiment, and is used in a chromaticity change acquisition unit for acquiring a change in chromaticity of the illumination light. Further, as shown in FIG. 2, the color sensor 13 is disposed opposite to the lower side surface, which is different from the light emitting surface of the light guide plate 5 (upper surface in FIG. 1). That is, the color sensor 13 is installed at a location other than the effective display area of the liquid crystal panel (display unit) 3, and the luminance and display quality of the liquid crystal panel 3 are reduced by providing the color sensor 13. Can be surely prevented!
- the color sensor 13 uses a light receiving element capable of individually detecting the chromaticity of each color light of RGB, and the red light, the green light, and the light included in the illumination light. Each chromaticity of blue light is detected. Further, the color sensor 13 is configured to output the detected red light, green light, and blue light chromaticities at predetermined time intervals to a correction determination unit described later.
- FIG. 3 is a diagram for explaining the main configuration of the gradation voltage correction system and the liquid crystal panel shown in FIG.
- a video signal from the outside of the liquid crystal display device 1 is input to the panel control unit 14 via a signal source (not shown) such as a PC.
- the panel control unit 14 is provided in the drive control circuit 11 (FIG. 1), and drives the pixel unit with respect to the signal line and the control line according to the input video signal. It is structured to do substantially.
- the panel control unit 14 is provided with an image processing unit 14a that generates instruction signals to the source driver 15 and the gate driver 16 based on the video signal. Further, the panel control unit 14 is incorporated with a gradation voltage correction unit 14b included in the gradation voltage correction system of the present embodiment, and as will be described in detail later, the image processing unit 14a.
- the instruction signal generated to the source driver 15 is corrected by the gradation voltage correction unit 14b and then output to the source driver 15! /.
- the source driver 15 and the gate driver 16 are driving circuits that drive a plurality of pixels provided in the liquid crystal panel 3 in units of pixels.
- the source driver 15 and the gate driver 16 include a plurality of signal lines S1 to SM.
- M is an integer of 2 or more
- N is an integer of 2 or more
- the signal lines S1 to SM and the control lines G1 to GN are arranged in a matrix, and the regions of the plurality of pixels are formed in the regions partitioned in the matrix.
- the plurality of pixels include red, green, and blue pixels. In addition, these red, green, and blue pixels are sequentially arranged in this order, for example, in parallel with the control lines G1 to GN.
- the gates of the switching elements 17 provided for the respective pixels are connected to the control lines G1 to GN.
- the source of the switching element 17 is connected to each of the signal lines S1 to SM.
- a pixel electrode 18 provided for each pixel is connected to the drain of each switching element 17.
- the common electrode 19 is configured to face the pixel electrode 18 with a liquid crystal layer provided on the liquid crystal panel 3 interposed therebetween. Then, the gate driver 16 sequentially outputs gate signals for turning on the gates of the corresponding switching elements 17 to the control lines Gl to GN based on the instruction signal from the image processing unit 14a.
- the source driver 15 applies a voltage signal (gradation voltage) corresponding to the luminance (gradation) of the display image to the corresponding signal lines S1 to SM based on an instruction signal from a gradation voltage output unit 14d described later. Output.
- the gradation voltage correction unit 14b is a correction determination unit 14c that determines the correction value of the gradation voltage for each color of red, green, and blue pixels based on the detection result from the color sensor 13.
- the instruction signal from the image processing unit 14a to the source driver 15 and the correction value of the gradation voltage determined by the correction determination unit 14c are input, and the input correction value is used to input to the source driver 15
- a gradation voltage output unit 14d and a force S are provided to correct the instruction signal and output it to the source driver 15.
- the correction determination unit 14c uses a look-up tape knob (hereinafter, also referred to as "LUT") 14cl connected to the color sensor 13 and the gradation voltage output unit 14d, and the color of the illumination light described above is used. Even when the degree changes, the correction value of the gradation voltage is determined for each color of the red, green, and blue pixels so as to cancel out the change in chromaticity. That is, LUT1 In 4cl, for each color light of red light, green light, and blue light, the chromaticity included in the detection result from the color sensor 13 and the optimum correction value of the gradation voltage should be tested or simulated. Are grasped in advance and associated with each other.
- LUT look-up tape knob
- the correction determination unit 14c calculates the correction value of the gradation voltage for each color of red, green, and blue pixels corresponding to the detection result. It is immediately transmitted to the regulated voltage output unit 14d!
- the gradation voltage output unit 14d when the correction value of the gradation voltage for each color of the red, green, and blue pixels is transmitted from the LUT 14cl, the correction value is used to input from the image processing unit 14a.
- the received instruction signal to the source driver 15 is corrected and output to the source driver 15 as a new instruction signal.
- the gradation voltage output unit 14d corresponds to the correction value of the corresponding color from the LUT 14cl with respect to the gradation voltage of the pixel unit of red, green, and blue determined by the image processing unit 14a according to the video signal. Is corrected to obtain a new gradation voltage.
- the gradation voltage output unit 14d generates an instruction signal for instructing new gradation voltages in red, green, and blue pixel units, and outputs the instruction signal to the source driver 15.
- the transmittance of the illumination light from the knock light device 2 is in units of red, green, and blue pixels in accordance with the new gradation voltage from the gradation voltage output unit 14d. Be changed.
- the liquid crystal display It is possible to prevent the display quality of the device 1 from deteriorating.
- the gradation voltage output unit 14d outputs the correction value of the gradation voltage determined by the correction determination unit 14c to the image processing unit 14a, and the image processing unit 14a outputs the correction value. Based on the above, a new gradation voltage may be determined for each pixel of red, green, and blue and output to the source driver 15 as an instruction signal.
- the operation of the gradation voltage correction system of the present embodiment will be specifically described.
- yellowing due to aging occurs in the light-emitting diode 4, and yellow light due to the yellowing is mixed with white light of the light-emitting diode 4, so that the illumination light to the liquid crystal panel 3 is mixed.
- An example will be described in which the degree of whiteness is reduced.
- FIG. 4 is a graph showing the effect of the gradation voltage correction system
- FIG. Fig. 4 (b) is a graph showing the relationship between the input gradation and the output voltage to each RGB pixel when the correction system does not correct the gradation voltage. It is a graph showing the relationship between the input gradation and the output voltage to each RGB pixel when correct.
- the gradation voltage correction unit 14b is as shown by curves 50r, 50g, and 50b in FIG.
- the gradation voltage determined by the image processing unit 14a is output to the source driver 15 without being changed. That is, the image processing unit 14a determines the gradation voltage in units of red, green, and blue pixels based on the video signal (input gradation) input to the panel control unit 14.
- the chromaticities of red light, green light, and blue light detected by the color sensor 13 are values that do not require correction of the gradation voltage, and the gradation voltage output
- the value of ⁇ 0 is output from the LUT 14cl to the unit 14d as correction values for each color of red, green, and blue.
- the gradation voltage (output voltage) corresponding to the input gradation is passed through the source driver 15. Output from the corresponding signal line.
- the chromaticities of red light, green light, and blue light detected by the color sensor 13 The adjustment voltage is a value that requires correction, and the correction value corresponding to the detection result of the color sensor 13 such as the LUT14cl is output to the gradation voltage output unit 14d for each color of red, green, and blue. .
- a correction value that increases the gradation voltage for a blue pixel is output so as to cancel yellow due to yellowing included in the illumination light, and the gradation for each of the red and green pixels is output.
- a correction value that does not change the regulated voltage that is, ⁇ 0) is output.
- the gradation voltage (output voltage) corresponding to the input gradation is passed through the source driver 15. Output from the corresponding signal line.
- the input voltage of the blue pixel is higher than the output voltage to the red and green pixels shown by the curves 60r and 60g, respectively.
- the grayscale voltage (output voltage) corresponding to the tone is increased by the correction value and passed through the source driver 15. Output from the corresponding signal line.
- the color sensor (chromaticity change acquisition unit) 13 is provided in order to acquire the change in chromaticity of the illumination light from the light emitting diode (light source) 4. .
- the correction determination unit 14c that determines the correction value of the gradation voltage for each color of the red, green, and blue pixels based on the detection result from the color sensor 13 is provided. Further, in the present embodiment, the corresponding color from the correction determining unit 14c is applied to the gradation voltage in pixel units of red, green, and blue determined by the image processing unit 14a according to the video signal from the outside.
- a gradation voltage output unit 14d for outputting an instruction signal for instructing a new gradation voltage for the corrected pixel unit to the source driver 15 is provided.
- the correction determination unit 14c cancels the chromaticity change of the illumination light so that red, green, For each color of blue and blue pixels, an appropriate gradation voltage correction value can be determined and output to the source driver (liquid crystal display device 1) 15 side via the gradation voltage output unit 14d.
- the liquid crystal display device 1 having excellent display performance that is prevented from being formed can be easily configured.
- each of the red light, the green light, and the blue light included in the illumination light Since the color sensor 13 for detecting chromaticity is used, the correction determination unit 14c can determine the correction value of the gradation voltage with high accuracy and output it to the gradation voltage output unit 14d. The display quality can be reliably prevented from deteriorating.
- FIG. 5 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to the second embodiment of the present invention.
- the main difference between this embodiment and the first embodiment is that a color sensor is provided on the display surface side of the liquid crystal panel. Note that elements that are the same as those in the first embodiment are denoted by the same reference numerals, and redundant description thereof is omitted.
- the backlight device 2 the liquid crystal panel 3, and the like are accommodated in a bezel 20 as a housing.
- the FPC 10, the drive control circuit 11, and the lighting drive circuit 12 are omitted for simplification of the drawing (the same applies to FIGS. 6, 7, and 9 described later). ) o
- the color sensor 13 is provided on the display surface side of the liquid crystal panel 3.
- the color sensor 13 is installed at a location other than the effective display area of the liquid crystal panel (display unit) 3 as in the first embodiment, and the brightness and display quality of the liquid crystal panel 3 are reduced. You can definitely prevent it from happening!
- the present embodiment can achieve the same operational effects as the first embodiment. That is, in the present embodiment, unlike the conventional example, the display quality is deteriorated even when the chromaticity change occurs in the illumination light of the light emitting diode 4 regardless of the light emitting color or type of the light emitting diode 4.
- the liquid crystal display device 1 having excellent display performance can be easily configured.
- FIG. 6 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to the third embodiment of the present invention.
- the main difference between this embodiment and the second embodiment is that a color sensor is provided outside the bezel. Note that elements common to those in the second embodiment are given the same reference numerals, and redundant descriptions thereof are omitted.
- the liquid crystal display device 1 of the present embodiment in the liquid crystal display device 1 of the present embodiment, a base as a casing is provided. Inside the zel 30, the knocklight device 2 and the liquid crystal panel 3 are accommodated. In addition, unlike the second embodiment, the liquid crystal display device 1 of the present embodiment uses a reflective sheet 6 ′ having an opening 6′a at the center and is provided outside the bezel 30.
- the color sensor 13 is configured to be able to detect illumination light (details will be described later).
- the bezel 30 is provided with an opening 30a at a position facing the center of the light guide plate 5, for example.
- an opening 6′a of the reflection sheet 6 ′ is disposed opposite to the upper side of the opening 30a.
- the color sensor 13 is provided on the lower side of the opening 30a so as to detect the illumination light emitted from the openings 6′a and 30a.
- the color sensor 13 is installed in a location other than the effective display area of the liquid crystal panel (display unit) 3 as in the first embodiment, and the brightness and display quality of the liquid crystal panel 3 are reduced. You can be sure to prevent it from happening.
- the present embodiment can provide the same operational effects as those of the second embodiment. That is, in the present embodiment, unlike the conventional example, the display quality is deteriorated even when the chromaticity change occurs in the illumination light of the light emitting diode 4 regardless of the light emitting color or type of the light emitting diode 4.
- the liquid crystal display device 1 having excellent display performance can be easily configured.
- FIG. 7 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to the fourth embodiment of the present invention
- FIG. 8 is a diagram of the gradation voltage correction system and the liquid crystal panel shown in FIG. It is a figure explaining the principal part structure.
- the main difference between this embodiment and the first embodiment is that a cold cathode tube is used as a light source, and a timer for measuring the lighting time of the cold cathode tube is provided in place of the color sensor. It is. Note that elements common to the first embodiment are given the same reference numerals, and redundant descriptions thereof are omitted.
- the knock light device 2, the liquid crystal panel 3, and the like are accommodated in a bezel 40 as a housing.
- a cold cathode tube 41 is disposed opposite to the left side surface of the light guide plate 5 instead of the light emitting diode, and is used as a light source. It is.
- the liquid crystal display device 1 of the present embodiment as shown in FIG.
- a panel control unit 24 is used in which the gradation voltage correction unit 24b constituting the gradation voltage correction system of the present embodiment is integrated. That is, in this embodiment, instead of the color sensor 13, a timer 24e for measuring the lighting time of the cold cathode tube 41 is provided in the gradation voltage correction unit 24b, and the gradation voltage correction system of this embodiment is provided.
- the gradation voltage correction unit 24b including all the components is integrally incorporated in the panel control unit 24.
- the gradation voltage correction unit 24b has the above-mentioned gradation for each color of red, green, and blue pixels based on the timer 24e and the measurement result from the timer 24e.
- the correction determination unit 24c that determines the correction value of the voltage, the instruction signal from the image processing unit 24a to the source driver 15 and the correction value of the gradation voltage determined by the correction determination unit 24c are input and input.
- a gradation voltage output unit 24d that corrects an instruction signal to the source driver 15 using the corrected value and outputs the corrected signal to the source driver 15 is provided.
- the timer 24e is used in the chromaticity change acquisition unit for acquiring the chromaticity change of the illumination light.
- the timer 24e is an integrated time obtained by integrating the lighting time of the cold cathode tube 41, and the cold cathode tube 41. It is configured to be able to measure both the elapsed time as well as the lighting start time when is turned on.
- the correction determination unit 24c uses the timer 24e and the LUT 24c 1 connected to the gradation voltage output unit 24d, and cancels the change in chromaticity even when the chromaticity of the illumination light changes.
- the correction value of the gradation voltage is determined for each color of the red, green, and blue pixels.
- the LUT24cl tests or simulates the accumulated time and elapsed time included in the measurement result from the timer 24e and the optimum gradation voltage correction value for each color light of red light, green light, and blue light. Etc., and are related in advance.
- the elapsed time and the correction value are associated with each other so that the correction value for the elapsed time changes every predetermined integration time (for example, 100 hours). .
- the correction determination unit 24c when the measurement result from the timer 24e is input to the LUT 24cl, the level for each color of the red, green, and blue pixels corresponding to the measurement result is displayed.
- the adjustment value of the regulated voltage is immediately transmitted to the gradation voltage output unit 24d.
- the gradation voltage output unit 24d when the correction value of the gradation voltage for each color of the red, green, and blue pixels is transmitted from the LUT 24cl, the correction value is used to input from the image processing unit 24a.
- the received instruction signal to the source driver 15 is corrected and output to the source driver 15 as a new instruction signal. That is, the gradation voltage output unit 24d corresponds to the correction value of the corresponding color from the LUT 24cl with respect to the gradation voltage of the pixel unit of red, green, and blue determined by the image processing unit 24a according to the video signal. Is corrected to obtain a new gradation voltage.
- the gradation voltage output unit 24d generates an instruction signal for instructing a new gradation voltage in units of red, green, and blue pixels, and outputs the instruction signal to the source driver 15.
- the transmittance of the illumination light from the knock light device 2 is in units of red, green, and blue pixels in accordance with the new gradation voltage from the gradation voltage output unit 24d. Be changed.
- the display quality of the liquid crystal display device 1 is improved. Can be prevented from decreasing.
- the gradation voltage output unit 24d outputs the gradation voltage correction value determined by the correction determination unit 24c to the image processing unit 24a, and the image processing unit 24a outputs the correction value. Based on the above, a new gradation voltage may be determined for each pixel of red, green, and blue and output to the source driver 15 as an instruction signal.
- the present embodiment can provide the same operational effects as those of the first embodiment. That is, in the present embodiment, unlike the above-described conventional example, display quality is degraded even when chromaticity changes occur in illumination light from the cold cathode tube 41, regardless of the emission color or type of the cold cathode tube 41.
- the liquid crystal display device 1 having excellent display performance can be easily configured.
- the timer (chromaticity change acquisition unit) 24e is used to acquire changes in chromaticity of red light, green light, and blue light included in the illumination light. Composed Therefore, it is possible to prevent the deterioration of the display quality of the liquid crystal display device 1 while simplifying the structure of the gradation voltage correction system.
- the gradation voltage correction system can be easily incorporated into the existing liquid crystal display device, and the performance of the liquid crystal display device can be easily improved.
- the installation location of the force timer 24e described for the case where the timer 24e is provided inside the gradation voltage correction unit 24b integrally incorporated in the panel control unit 24 is limited to this.
- the timer 24e is not limited as long as it can measure the lighting time of the cold cathode tube (light source) 41.
- the microcomputer is used in the lighting drive circuit 12 that drives the cold cathode tube 41 as an inverter.
- the timer 24e can be configured by using the clock generation unit of the microcomputer and a counter that counts the clock signal of the clock generation unit according to the lighting time of the cold cathode tube 41.
- FIG. 9 is a schematic diagram for explaining a gradation voltage correction system and a liquid crystal display device according to a fifth embodiment of the present invention
- FIG. 10 is a diagram of the gradation voltage correction system and the liquid crystal panel shown in FIG. It is a figure explaining the principal part structure.
- the main difference between this embodiment and the first embodiment is that a temperature sensor for detecting the ambient temperature of the light emitting diode is used instead of the color sensor. Note that elements that are the same as those in the first embodiment are given the same reference numerals, and redundant descriptions thereof are omitted.
- the knock light device 2, the liquid crystal panel 3, and the like are accommodated in a bezel 20 as a housing.
- a temperature sensor 21 is provided on the lower side of the reflective sheet 6 in place of the color sensor, and the ambient temperature of the light emitting diode 4 is detected. It is supposed to be. That is, the temperature sensor 21 is included in the gradation voltage correction system of the present embodiment, and is used in the chromaticity change acquisition unit for acquiring the chromaticity change of the illumination light.
- an image processing unit that generates each instruction signal to the source driver 15 and the gate driver 16 based on a video signal from the outside.
- 34a and the gradation voltage correction unit 34b included in the gradation voltage correction system of the present embodiment The panel control unit 34 is integrally configured.
- the gradation voltage correction unit 34b sets the gradation voltage correction value for each of the red, green, and blue pixels based on the detection result from the temperature sensor 21.
- the correction determination unit 34c to be determined, the instruction signal from the image processing unit 34a to the source driver 15 and the correction value of the gradation voltage determined by the correction determination unit 34c are input, and the input correction value is used.
- a gradation voltage output unit 34d that corrects an instruction signal to the source driver 15 and outputs the corrected signal to the source driver 15 is provided.
- the correction determination unit 34c uses the LUT 34 cl connected to the temperature sensor 21 and the gradation voltage output unit 34d, and cancels the change in chromaticity even when the chromaticity of the illumination light changes.
- the correction value of the gradation voltage is determined for each color of the red, green, and blue pixels. That is, for each color light of red light, green light, and blue light, the LUT 34cl performs tests or simulations on the chromaticity included in the detection result from the temperature sensor 21 and the optimum correction value of the gradation voltage. It is grasped in advance and related.
- the correction determination unit 34c calculates the correction value of the gradation voltage for each color of red, green, and blue pixels corresponding to the detection result. It is immediately transmitted to the regulated voltage output unit 34d.
- the gradation voltage output unit 34d when the correction value of the gradation voltage for each color of the red, green, and blue pixels is transmitted from the LUT 34cl, the correction value is used to input from the image processing unit 34a.
- the received instruction signal to the source driver 15 is corrected and output to the source driver 15 as a new instruction signal. That is, the gradation voltage output unit 34d corresponds to the correction value of the corresponding color from the LUT 34cl with respect to the gradation voltage of the pixel unit of red, green, and blue determined by the image processing unit 34a according to the video signal. Is corrected to obtain a new gradation voltage.
- the gradation voltage output unit 34d generates an instruction signal for instructing a new gradation voltage in units of red, green, and blue pixels, and outputs the instruction signal to the source driver 15.
- the transmittance of the illumination light from the knock light device 2 is in units of red, green, and blue pixels in accordance with the new gradation voltage from the gradation voltage output unit 34d. Be changed.
- the display quality of the liquid crystal display device 1 is reduced. Can be prevented.
- the gradation voltage output unit 34d outputs the correction value of the gradation voltage determined by the correction determination unit 34c to the image processing unit 34a, and the image processing unit 34a outputs the correction value. Based on the above, a new gradation voltage may be determined for each pixel of red, green, and blue and output to the source driver 15 as an instruction signal.
- the present embodiment can provide the same operational effects as the first embodiment. That is, in the present embodiment, unlike the conventional example, the display quality is deteriorated even when the chromaticity change occurs in the illumination light of the light emitting diode 4 regardless of the light emitting color or type of the light emitting diode 4.
- the liquid crystal display device 1 having excellent display performance can be easily configured.
- the temperature sensor (chromaticity change acquisition unit) 21 is used to acquire changes in chromaticity of red light, green light, and blue light included in the illumination light.
- the gradation voltage correction system of the present invention is not limited to this, The present invention can be applied to various display devices including a non-light emitting display unit that displays information such as images and characters using light of a light source.
- the gradation voltage correction system of the present invention can be suitably used for a transflective liquid crystal display device, or a projection display device such as rear projection.
- the present invention is applied to a liquid crystal display device having an edge light type backlight device using a light guide plate, but the gradation voltage correction system of the present invention is applied to this.
- the present invention can be applied to a liquid crystal display device having a direct-type backlight device in which a light source that is not limited is disposed below the liquid crystal panel.
- the gradation voltage correction system according to the present invention has the power described above when the gradation voltage correction unit is integrally incorporated in the panel control unit on the liquid crystal display device side.
- Chromaticity change acquisition unit for acquiring the chromaticity change of illumination light irradiated to each of the red, green, and blue pixels provided on the apparatus side, and the acquisition result from the chromaticity change acquisition unit
- a correction determination unit that determines a correction value of the gradation voltage determined for each pixel based on information displayed on the display device side for each color of red, green, and blue pixels, and the correction
- it may be configured separately from the panel control unit, for example.
- the case where the panel control unit and the gradation voltage correction unit are integrally configured is preferable in that the configuration of the display device can be simplified.
- the force described about the configuration using the look-up table (LUT) as the correction determination unit is not limited to this, for example, sensor detection such as a color sensor.
- Results and timer measurement results and gradation voltage correction values are stored in advance in association with the memory, and the sensor detection results and timer measurement results are input, and these input result data are used.
- the memory it is possible to use a correction determination unit having a CPU, MPU, or other arithmetic unit that extracts a corresponding correction value.
- the correction value of the gradation voltage can be determined immediately, and the chromaticity change occurs in the illumination light. Even in this case, it is preferable in that the deterioration of display quality can be immediately prevented. Furthermore, since the correction determination unit can be configured without the calculation unit, it is also preferable in that the configuration of the gradation voltage correction system can be easily simplified.
- the chromaticity change acquisition unit of the present invention is not limited to this, and a color sensor that detects the luminance of red light, green light, and blue light, and the detection result of each luminance of the color sensor, the red light.
- a calculation unit that obtains each chromaticity of green light and blue light may be provided to obtain a change in chromaticity of the illumination light.
- each light quantity of red light, green light and blue light is detected.
- a configuration that obtains the chromaticity change of the illumination light by providing a light quantity sensor that emits light and a calculation unit that obtains each chromaticity of red light, green light, and blue light from the detection result of each light quantity of this light quantity sensor.
- the light source of the present invention is not limited to those described above, for example, three types of light emitting diodes that emit light of each color of RGB, or discharge tubes such as hot cathode tubes and xenon tubes, or light emitting devices.
- a so-called hybrid type light source that combines a diode and a discharge tube can also be used.
- the present invention relates to a gradation voltage correction system capable of preventing display quality from being deteriorated even when a chromaticity change occurs in illumination light from a light source, and a high-performance display device using the same Useful for.
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- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US12/312,810 US20100053136A1 (en) | 2006-12-06 | 2007-07-06 | Gradation voltage correction system and display device using the same |
CN2007800447403A CN101548312B (zh) | 2006-12-06 | 2007-07-06 | 灰度电压校正***、及使用该灰度电压校正***的显示装置 |
EP07768268A EP2101311A4 (en) | 2006-12-06 | 2007-07-06 | GRADATION VOLTAGE CORRECTION SYSTEM AND DISPLAY DEVICE USING SUCH A SYSTEM |
JP2008548170A JPWO2008068920A1 (ja) | 2006-12-06 | 2007-07-06 | 階調電圧補正システム、及びこれを用いた表示装置 |
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JP2006329575 | 2006-12-06 | ||
JP2006-329575 | 2006-12-06 |
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WO2008068920A1 true WO2008068920A1 (ja) | 2008-06-12 |
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PCT/JP2007/063536 WO2008068920A1 (ja) | 2006-12-06 | 2007-07-06 | 階調電圧補正システム、及びこれを用いた表示装置 |
Country Status (5)
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US (1) | US20100053136A1 (ja) |
EP (1) | EP2101311A4 (ja) |
JP (1) | JPWO2008068920A1 (ja) |
CN (1) | CN101548312B (ja) |
WO (1) | WO2008068920A1 (ja) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008224780A (ja) * | 2007-03-08 | 2008-09-25 | Funai Electric Co Ltd | テレビジョン装置および表示装置 |
WO2011132455A1 (ja) * | 2010-04-19 | 2011-10-27 | シャープ株式会社 | 表示装置 |
JP2012073400A (ja) * | 2010-09-28 | 2012-04-12 | Sanyo Electric Co Ltd | 表示装置 |
EP2478410A2 (en) * | 2009-09-15 | 2012-07-25 | NDS Surgical Imaging, LLC | Method and system for correction, measurement and display of images |
WO2012164678A1 (ja) * | 2011-05-31 | 2012-12-06 | Necディスプレイソリューションズ株式会社 | 表示装置、表示方法 |
US8643588B2 (en) | 2008-12-30 | 2014-02-04 | Hon Hai Precision Industry Co., Ltd. | Display device and control method thereof |
JP2017120421A (ja) * | 2015-12-31 | 2017-07-06 | エルジー ディスプレイ カンパニー リミテッド | 表示装置、光学補償システムおよび光学補償方法 |
WO2019013109A1 (ja) * | 2017-07-13 | 2019-01-17 | シャープ株式会社 | 液晶表示装置 |
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JP4646149B2 (ja) * | 2008-01-09 | 2011-03-09 | 東芝モバイルディスプレイ株式会社 | 液晶表示装置及びその製造方法 |
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CN101976552A (zh) * | 2010-11-03 | 2011-02-16 | 中航华东光电有限公司 | 用于lcd屏的伽马校正的方法 |
WO2012073782A1 (ja) * | 2010-11-30 | 2012-06-07 | シャープ株式会社 | 表示装置及びテレビ受信装置 |
WO2014083970A1 (ja) * | 2012-11-30 | 2014-06-05 | 日本電気株式会社 | 画像表示装置および画像表示方法 |
KR20150061364A (ko) * | 2013-11-27 | 2015-06-04 | 삼성디스플레이 주식회사 | 표시 장치 및 이의 표시 방법 |
KR102412372B1 (ko) * | 2015-12-15 | 2022-06-24 | 주식회사 지2터치 | 표시장치의 화소를 이용한 터치 검출 센서 및 터치 검출 방법 |
CN110967862A (zh) * | 2018-09-30 | 2020-04-07 | 北京小米移动软件有限公司 | 显示装置及其控制方法、控制装置和计算机可读存储介质 |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06217243A (ja) * | 1993-01-14 | 1994-08-05 | Matsushita Electric Ind Co Ltd | 画像表示装置 |
JPH11272253A (ja) * | 1998-03-25 | 1999-10-08 | Fuji Photo Film Co Ltd | 画像表示装置 |
JP2003322837A (ja) * | 2002-05-07 | 2003-11-14 | Hitachi Ltd | 液晶表示装置 |
JP2004021147A (ja) | 2002-06-20 | 2004-01-22 | Advanced Display Inc | 面状光源装置及びそれを用いた液晶表示装置 |
JP2006030416A (ja) * | 2004-07-14 | 2006-02-02 | Mitsubishi Electric Corp | 画像表示装置および画像表示方法 |
JP2006091235A (ja) * | 2004-09-22 | 2006-04-06 | Seiko Epson Corp | 液晶表示装置及びその色調整方法、並びに電子機器 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63261327A (ja) * | 1987-04-20 | 1988-10-28 | Sony Corp | カラ−液晶表示装置 |
JPH03153211A (ja) * | 1989-11-10 | 1991-07-01 | Casio Comput Co Ltd | 液晶表示装置 |
US5493183A (en) * | 1994-11-14 | 1996-02-20 | Durel Corporation | Open loop brightness control for EL lamp |
EP0755042B1 (en) * | 1995-07-20 | 2003-07-16 | STMicroelectronics S.r.l. | Method and device for uniforming luminosity and reducing phosphor degradation of a field emission flat display |
DE10138005B4 (de) * | 2001-08-02 | 2011-03-24 | Robert Bosch Gmbh | Anzeigevorrichtung für insbesondere ein Fahrzeug, Ansteuermittel für eine Anzeigevorrichtung sowie Verfahren für die Ansteuerung einer Anzeigevorrichtung |
EP1705634A4 (en) * | 2003-11-19 | 2009-02-18 | Eizo Nanao Corp | METHOD AND APPARATUS FOR COMPENSATING THE CHANGE OF A LIQUID CRYSTAL DISPLAY BY INTERVAL OF YEARS, COMPUTER PROGRAM, AND LIQUID CRYSTAL DISPLAY |
US7952555B2 (en) * | 2003-11-19 | 2011-05-31 | Eizo Nanao Corporation | Luminance control method, liquid crystal display device and computer program |
JP4196917B2 (ja) * | 2004-09-22 | 2008-12-17 | セイコーエプソン株式会社 | 液晶表示装置の色調整方法と色調整装置、液晶表示装置、及び電子機器 |
US20070170449A1 (en) * | 2006-01-24 | 2007-07-26 | Munisamy Anandan | Color sensor integrated light emitting diode for LED backlight |
-
2007
- 2007-07-06 JP JP2008548170A patent/JPWO2008068920A1/ja active Pending
- 2007-07-06 EP EP07768268A patent/EP2101311A4/en not_active Withdrawn
- 2007-07-06 US US12/312,810 patent/US20100053136A1/en not_active Abandoned
- 2007-07-06 WO PCT/JP2007/063536 patent/WO2008068920A1/ja active Application Filing
- 2007-07-06 CN CN2007800447403A patent/CN101548312B/zh not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06217243A (ja) * | 1993-01-14 | 1994-08-05 | Matsushita Electric Ind Co Ltd | 画像表示装置 |
JPH11272253A (ja) * | 1998-03-25 | 1999-10-08 | Fuji Photo Film Co Ltd | 画像表示装置 |
JP2003322837A (ja) * | 2002-05-07 | 2003-11-14 | Hitachi Ltd | 液晶表示装置 |
JP2004021147A (ja) | 2002-06-20 | 2004-01-22 | Advanced Display Inc | 面状光源装置及びそれを用いた液晶表示装置 |
JP2006030416A (ja) * | 2004-07-14 | 2006-02-02 | Mitsubishi Electric Corp | 画像表示装置および画像表示方法 |
JP2006091235A (ja) * | 2004-09-22 | 2006-04-06 | Seiko Epson Corp | 液晶表示装置及びその色調整方法、並びに電子機器 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2101311A4 * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008224780A (ja) * | 2007-03-08 | 2008-09-25 | Funai Electric Co Ltd | テレビジョン装置および表示装置 |
US8643588B2 (en) | 2008-12-30 | 2014-02-04 | Hon Hai Precision Industry Co., Ltd. | Display device and control method thereof |
EP2478410A2 (en) * | 2009-09-15 | 2012-07-25 | NDS Surgical Imaging, LLC | Method and system for correction, measurement and display of images |
WO2011132455A1 (ja) * | 2010-04-19 | 2011-10-27 | シャープ株式会社 | 表示装置 |
US9111501B2 (en) | 2010-04-19 | 2015-08-18 | Sharp Kabushiki Kaisha | Display device |
JP2012073400A (ja) * | 2010-09-28 | 2012-04-12 | Sanyo Electric Co Ltd | 表示装置 |
WO2012164678A1 (ja) * | 2011-05-31 | 2012-12-06 | Necディスプレイソリューションズ株式会社 | 表示装置、表示方法 |
JP5791130B2 (ja) * | 2011-05-31 | 2015-10-07 | Necディスプレイソリューションズ株式会社 | 表示装置、表示方法 |
JP2017120421A (ja) * | 2015-12-31 | 2017-07-06 | エルジー ディスプレイ カンパニー リミテッド | 表示装置、光学補償システムおよび光学補償方法 |
WO2019013109A1 (ja) * | 2017-07-13 | 2019-01-17 | シャープ株式会社 | 液晶表示装置 |
Also Published As
Publication number | Publication date |
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JPWO2008068920A1 (ja) | 2010-03-18 |
CN101548312A (zh) | 2009-09-30 |
CN101548312B (zh) | 2013-07-03 |
EP2101311A1 (en) | 2009-09-16 |
US20100053136A1 (en) | 2010-03-04 |
EP2101311A4 (en) | 2010-03-17 |
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