WO2012073864A1 - Dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2012073864A1
WO2012073864A1 PCT/JP2011/077324 JP2011077324W WO2012073864A1 WO 2012073864 A1 WO2012073864 A1 WO 2012073864A1 JP 2011077324 W JP2011077324 W JP 2011077324W WO 2012073864 A1 WO2012073864 A1 WO 2012073864A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
color
display device
primary color
crystal display
Prior art date
Application number
PCT/JP2011/077324
Other languages
English (en)
Japanese (ja)
Inventor
悠一 吉田
冨沢　一成
智彦 森
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 WO2012073864A1 publication Critical patent/WO2012073864A1/fr

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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
    • G09G3/36—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 using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/52—RGB geometrical arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/58—Arrangements comprising a monitoring photodetector
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • 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
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation
    • 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 liquid crystal display device, and more particularly to a liquid crystal display device that performs display in four primary colors.
  • the liquid crystal display device has advantages such as light weight, thinness, and low power consumption, and is used not only as a small display device such as a display unit of a mobile phone but also as a large television. Unlike a self-luminous panel such as a cathode ray tube (CRT) or a plasma display panel (Plasma Display Panel: PDP), the liquid crystal panel does not emit light. For this reason, in general, a liquid crystal display device performs display using light of a backlight disposed on the back surface of a liquid crystal panel.
  • CTR cathode ray tube
  • PDP plasma display panel
  • a liquid crystal display device that adds four or more primary colors additively has been proposed, unlike a general three primary color liquid crystal display device.
  • Such a liquid crystal display device is also called a multi-primary color liquid crystal display device.
  • another primary color is added to three primary colors (that is, red, green, and blue), and the color reproduction range is expanded.
  • display is performed by converting the gradation level of an input video signal that can be displayed by a general three-primary color display device into gradation levels of four or more primary colors (for example, patents). Such a conversion is also called multi-primary color conversion.
  • Patent Document 3 proposes an algorithm and a calibration method for converting a color (target color) to be reproduced and displayed into four color components of a display panel in a display device having four or more primary colors. This will be described below.
  • a three-color component R that realizes tristimulus values X, Y, and Z of the XYZ color system is used to perform a specific color reproduction.
  • a combination of G and B may be calculated.
  • one solution can be obtained by calculating the inverse matrix of the regular matrix M 3 ⁇ 3 of 3 rows and 3 columns from the following equation (1).
  • the color reproduction area of the display panel is divided into a plurality of parts in order to lower the order, and then N 4 ⁇ 3 of each divided area is calculated to obtain four color components. Realization of conversion and calibration.
  • the present invention has been made in view of the above problems, and an object thereof is to provide a technique for efficiently performing calibration in a four-primary color display.
  • a manufacturing method of a liquid crystal display device is a manufacturing method of a liquid crystal display device including a liquid crystal panel in which a plurality of pixels are each composed of four different sub-pixels, and the chromaticity of each of the four primary color displays is measured.
  • the difference ⁇ Z between the input value to the liquid crystal panel and the measured value measured in the first step is adjusted for Z of the blue component
  • a third step of adjusting the difference ⁇ X or ⁇ Y between the input value to the liquid crystal panel and the measured value measured in the first step for X or Y of the color other than the blue component after the second step and the second step Process is a manufacturing method of a liquid crystal display device including a liquid crystal panel in which a plurality of pixels are each composed of four different sub-pixels, and the chromaticity of each of the four primary color displays is measured.
  • the difference ⁇ Z between the input value to the liquid crystal panel and the measured value measured in the first step is adjusted for Z of the blue component
  • the method according to the present invention does not divide the area at the time of calibration, and performs the same processing over the entire area, so that a stable calibration result can be obtained while maintaining continuity.
  • the liquid crystal display device enables calibration in a four-primary color display and can be performed efficiently.
  • FIG. 1 is a schematic diagram of a liquid crystal display device and a calibration system in an embodiment of the present invention. It is a schematic diagram of the pixel in the embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an internal configuration of a four primary color conversion circuit 30 shown in FIG. 1. It is a flowchart figure of the calibration method in embodiment of this invention. It is a calibration result shown to the specific example of embodiment of this invention.
  • FIG. 1 shows a schematic diagram of a liquid crystal display device 100 and a system for performing calibration.
  • the liquid crystal surface device 100 includes a liquid crystal panel 10, a backlight (not shown), and a four primary color conversion circuit 30.
  • the liquid crystal panel 10 has a plurality of pixels. The plurality of pixels are arranged in a matrix of a plurality of rows and a plurality of columns. Each pixel is defined by four subpixels.
  • the liquid crystal panel 10 and the liquid crystal display device 100 are also referred to as a 4-primary color panel and a 4-primary color display device, respectively.
  • FIG. 2 shows a schematic diagram of the pixel P in the liquid crystal panel 10.
  • the pixel P has four or more subpixels. Four or more sub-pixels display different colors.
  • the pixel P is also called a color display pixel.
  • the pixel P has a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and a yellow sub-pixel Ye.
  • the red sub-pixel R, the green sub-pixel G, the blue sub-pixel B, and the yellow sub-pixel Ye are shown in a line along the row direction, but as shown in FIG.
  • the red sub-pixel R, the green sub-pixel G, the blue sub-pixel B, and the yellow sub-pixel Ye may be arranged in a 2 ⁇ 2 matrix.
  • the areas of the red sub-pixel R, the green sub-pixel G, the blue sub-pixel B, and the yellow sub-pixel Ye are shown to be equal to each other, but the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B
  • the areas of the yellow sub-pixel Ye may be different.
  • the area of the red subpixel R is larger than the subpixel average area. Highly bright red can be fully expressed.
  • the area of the blue subpixel B is larger than the average area of the subpixels, it is possible to suppress a decrease in the light emission efficiency of the backlight. For this reason, the areas of the red sub-pixel R and the blue sub-pixel B are preferably larger than the areas of the green sub-pixel G and the yellow sub-pixel Ye.
  • the four primary color conversion circuit 30 converts input color information such as XYZ or xvYCC into four primary color signals R, G, B, and Ye and supplies them to the liquid crystal panel 10.
  • R, G, B, and so on can be reproduced faithfully with respect to color information such as XYZ or xvYCC for simplification of description.
  • R, G, B, and so on can be reproduced faithfully with respect to color information such as XYZ or xvYCC for simplification of description.
  • FIG. 3 shows an example of the internal configuration of the four primary color conversion circuit 30.
  • the gamma correction circuit 2 After the color information input by the four primary color conversion algorithm circuit 1 is converted into four primary color signals R 0 , G 0 , B 0 , Ye 0 , the gamma correction circuit 2 performs gamma correction, and the four primary color signals R out , G out , B out , Ye out are output.
  • Calibration is performed by the following method.
  • the colors displayed on the four primary color panels are measured by the chromaticity measuring device 200, and the measurement results are fed back to the feedback circuit 300, and the theoretical values R 0 , B 0 , G 0 , Ye of the actually used four color gradations. Differences from 0 are recognized as ⁇ X, ⁇ Y, and ⁇ Z, adjustment using blue primaries and adjustment using red green yellow primaries are performed, and the combination of the four primary colors after adjustment is fed back to the four primary color system. If the chromaticity deviation does not fall within the arbitrarily set allowable range, the same operation is repeated again.
  • Fig. 4 shows the calibration flowchart.
  • step 2 a combination of four target colors to be calibrated is determined. Various algorithms are conceivable for the four-color conversion, but here the conversion algorithm is not specified because the theoretical value is calculated from the four-color combination after conversion.
  • step 3 tristimulus values XYZ are obtained. Since it is a theoretical value, the XYZ values that are created with four colors according to the corrected gamma are obtained using the primary chromaticities of the four primary colors (Table 1 below).
  • step 4 the amount of change in X, Y, and Z when a small amount of gradation is shifted from each gradation for each primary color is calculated in advance, and the behavior of each color is defined.
  • step 4 four color gradations are actually displayed and measured.
  • step 5 the blue primary color difference that minimizes ⁇ Z out of the error from the target value is obtained.
  • step 6 the difference between the red, green, and yellow primary colors that can minimize the remaining ⁇ X and ⁇ Y is obtained.
  • step 7 the difference between the resulting chromaticity point and the target point is confirmed. If the difference is larger than the arbitrary chromaticity deviation allowable range, the process returns to step 3.
  • the X component is composed of similar proportions for each primary color with respect to the overall components, and the Y component also enters the green pixel and the yellow pixel in proportion, but as an order There is not much difference.
  • the proportion of the blue primary color in the Z component is orders of magnitude. This means that the Z component of the color displayed by color mixing in this panel is almost the influence of the blue primary color. Therefore, in the color adjustment, the error of the Z component can be adjusted efficiently using the blue primary color. Thereafter, the X and Y components are adjusted using the remaining red, green, and yellow primary colors.
  • the color balance (calibration direction) of gradation change can be maintained to some extent while suppressing the amount of change.
  • the final change amount is (r / C, g / C, ye / C) (however, the required change amount is an integer). Reflecting this amount of change, the color difference from the target value is calculated for XYZ finally obtained. An allowable value of color difference is set (for example, 0.0003), and when this is not satisfied, the trial is repeated.
  • the input (target chromaticity point) gradation is a combination of four colors as shown in Table 2 below.
  • the tristimulus values XYZ at this time are as shown in Table 3 below.
  • ⁇ Z is adjusted with the blue primary color. Comparing the Z component of the target value and the measured value, the adjustment amount of blue primary colors is obtained by [Delta] Z / [Delta] Z B. In this case, as shown in Table 6 below, it can be seen that the amount of change in B is approximately minus 3.
  • Table 7 below shows XYZ that has been changed by adjusting the blue primary color and the difference from the target point is defined again.
  • r, g, and ye are gradation changes of red, green and yellow.
  • FIG. 5 shows the chromaticity change process by the calibration of this embodiment.
  • the respective display gradations RGBYe after trials 1 to 4 are shown in Table 12 below.
  • Table 13 below shows the tristimulus values XYZ and the color difference ⁇ u′v ′ from the target point after trials 1 to 4 are performed.
  • the liquid crystal display device can display a wide color reproduction range with low power consumption.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

La présente invention se rapporte à un procédé de fabrication d'un dispositif d'affichage à cristaux liquides. Le procédé selon l'invention est utilisé pour fabriquer un dispositif d'affichage à cristaux liquides, le dispositif comprenant un panneau à cristaux liquides. L'invention est caractérisée en ce que chacun d'une pluralité de pixels comprend des sous-pixels de quatre couleurs différentes. Le procédé selon l'invention comprend : une première étape consistant à mesurer une chromaticité de chaque affichage de couleur primaire des quatre couleurs ; une deuxième étape consistant à ajuster une différence ΔZ entre une valeur pour une composante bleue d'entrée Z dans le panneau à cristaux liquides et la valeur de mesure mesurée au cours de la première étape, pour des composantes trichromatiques X, Y et Z du système de spécification de couleurs XYZ ; et une troisième étape, consécutive à la deuxième étape, consistant à ajuster une différence ΔX ou ΔY entre une valeur pour une couleur de X ou Y autre que la composante bleue entrée dans le panneau à cristaux liquides et la valeur de mesure mesurée au cours de la deuxième étape. La solution technique de la présente invention propose un procédé de fabrication caractérisé en ce qu'un étalonnage d'un panneau d'affichage à quatre couleurs primaires peut être accompli de façon efficace.
PCT/JP2011/077324 2010-12-01 2011-11-28 Dispositif d'affichage à cristaux liquides WO2012073864A1 (fr)

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JP2010-268099 2010-12-01
JP2010268099A JP2014038117A (ja) 2010-12-01 2010-12-01 液晶表示装置

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014013983A1 (fr) * 2012-07-20 2014-01-23 シャープ株式会社 Dispositif d'affichage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005128254A (ja) * 2003-10-23 2005-05-19 Nanao Corp 表示特性較正方法、表示特性較正装置及びコンピュータプログラム
JP2005328386A (ja) * 2004-05-14 2005-11-24 Sharp Corp ホワイトバランス補正回路の設定システム及び方法、該システムに使用するｌｓｉ回路、及び液晶テレビ
JP2007241120A (ja) * 2006-03-10 2007-09-20 Casio Hitachi Mobile Communications Co Ltd 画像処理装置、画像処理方法、及び、プログラム
JP2010217516A (ja) * 2009-03-17 2010-09-30 Sony Corp 画像表示装置
WO2011083808A1 (fr) * 2010-01-07 2011-07-14 シャープ株式会社 Dispositif d'affichage à cristaux liquides et circuit de conversion de signal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005128254A (ja) * 2003-10-23 2005-05-19 Nanao Corp 表示特性較正方法、表示特性較正装置及びコンピュータプログラム
JP2005328386A (ja) * 2004-05-14 2005-11-24 Sharp Corp ホワイトバランス補正回路の設定システム及び方法、該システムに使用するｌｓｉ回路、及び液晶テレビ
JP2007241120A (ja) * 2006-03-10 2007-09-20 Casio Hitachi Mobile Communications Co Ltd 画像処理装置、画像処理方法、及び、プログラム
JP2010217516A (ja) * 2009-03-17 2010-09-30 Sony Corp 画像表示装置
WO2011083808A1 (fr) * 2010-01-07 2011-07-14 シャープ株式会社 Dispositif d'affichage à cristaux liquides et circuit de conversion de signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014013983A1 (fr) * 2012-07-20 2014-01-23 シャープ株式会社 Dispositif d'affichage
JP2014039246A (ja) * 2012-07-20 2014-02-27 Sharp Corp 表示装置
CN104471922A (zh) * 2012-07-20 2015-03-25 夏普株式会社 显示装置

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