WO2019119606A1 - 显示装置的驱动方法、驱动装置及显示装置 - Google Patents

显示装置的驱动方法、驱动装置及显示装置 Download PDF

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WO2019119606A1
WO2019119606A1 PCT/CN2018/073933 CN2018073933W WO2019119606A1 WO 2019119606 A1 WO2019119606 A1 WO 2019119606A1 CN 2018073933 W CN2018073933 W CN 2018073933W WO 2019119606 A1 WO2019119606 A1 WO 2019119606A1
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gray scale
red
blue
partition
ave
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PCT/CN2018/073933
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English (en)
French (fr)
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康志聪
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惠科股份有限公司
重庆惠科金渝光电科技有限公司
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Priority to US16/064,358 priority Critical patent/US11176897B2/en
Publication of WO2019119606A1 publication Critical patent/WO2019119606A1/zh

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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
    • 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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • 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
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • 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
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Definitions

  • the present application relates to the field of display, and in particular, to a driving method, a driving device and a display device for a display device.
  • a liquid crystal display device is a flat thin display device composed of a certain number of color or black and white pixels placed in front of a light source or a reflecting surface.
  • Each pixel consists of a layer of liquid crystal molecules suspended between two transparent electrodes, and two polarizing filters with polarization directions perpendicular to each other on the outside. If there is no liquid crystal between the electrodes, the light passes through one of the polarizing filters and its polarization direction will be completely perpendicular to the second polarizing plate, and thus is completely blocked. However, if the direction of polarization of the light passing through a polarizing filter is rotated by the liquid crystal, it can pass through another polarizing filter. The rotation of the liquid crystal to the polarization direction of the light can be controlled by an electrostatic field, thereby achieving control of the light.
  • the arrangement of the liquid crystal molecules is determined by the arrangement of the surface of the electrode, and the surface of the chemical substance of the electrode can serve as a seed crystal of the crystal.
  • the upper and lower electrodes of the liquid crystal are vertically aligned.
  • the liquid crystal molecules are spirally arranged, and the light passing through one polarizing filter rotates in the polarization direction after passing through the liquid crystal cell, thereby being able to pass through the other polarizing plate. During this process a small portion of the light is blocked by the polarizer and appears gray from the outside.
  • the liquid crystal molecules After the charge is applied to the transparent electrode, the liquid crystal molecules will be arranged almost in parallel along the direction of the electric field, so that the polarization direction of the light transmitted through one of the polarizing filters is not rotated, so that the light is completely blocked. At this point the pixel looks black.
  • the voltage By controlling the voltage, it is possible to control the degree of distortion of the alignment of the liquid crystal molecules to achieve different gradations.
  • the color filter is used to generate various colors, which is a key component of the liquid crystal display device from gray scale to color, and the backlight is provided by the backlight module of the LCD, and then combined with the driver IC and the liquid crystal control.
  • the gray scale display forms a color display screen by passing the light source through the photoresist color layer of the color filter.
  • the commonly used photoresist color layer of the color filter in the liquid crystal display device may be a red, green and blue primary color light mode (Red, Green, Blue; red, green and blue color model) or a green, red and yellow primary color light mode Cyan, Magenta, Yellow; CMY color Model) Two modes.
  • liquid crystal display devices have refractive index and wavelength dependence, different wavelength transmittances are related to phase delay, showing different degrees of transmittance and wavelength, and with voltage driving, different wavelength phase delays will also produce different degrees. The change affects the penetration performance of different wavelengths.
  • the purpose of the application is to provide a driving method of a display device, comprising the following steps:
  • the gray level of the partition green average signal is between a first value gray scale of a predefined range
  • the gray scale of the partition red average signal and the gray level of the partition blue average signal are between predefined
  • a second value gray scale of the range adjusts the red and blue gamma ( ⁇ ) from the original ⁇ R and ⁇ B to ⁇ R1 and ⁇ B1, where ⁇ R1> ⁇ R and ⁇ B1> ⁇ B.
  • the first value gray scale and the second value gray scale of the predefined range are selected from the following groups:
  • a first group is when the first value gray scale is between 255 gray scale and 200 gray scale, then the second value gray scale is between 20 gray scale and 180 gray scale;
  • a second group is when the first value gray scale is between 200 gray scale and 150 gray scale, then the second value gray scale is between 10 gray scale and 180 gray scale;
  • a third group is when the first value gray scale is between 150 gray scale and 100 gray scale, then the second value gray scale is between 10 gray scale and 140 gray scale;
  • a fourth group is when the first value gray scale is between 100 gray scale and 50 gray scale, then the second value gray scale is between 10 gray scale and 80 gray scale;
  • a fifth group is when the first value gray scale is between 50 gray scales to 0 gray scales, and the second value gray scale is between 10 gray scales to 40 gray scales.
  • another object of the present application is to provide a driving device for a display device, comprising at least one partition, each partition being composed of a plurality of pixel units, each pixel unit
  • the invention comprises a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, comprising: calculating an average signal of all sub-pixel units in a partition, and obtaining a partition red average signal, a partition green average signal, A partition blue average signal; according to the gray level of the red, green and blue average signals corresponding to the predefined range, respectively perform red and blue gamma adjustment; finally, adjust the brightness of the corresponding red and blue light sources.
  • another object of the present application is to provide a display device including a display panel and a driving device of the above display device, wherein the driving device transmits an image signal To the display panel.
  • the average red signal of all sub-pixel units in the partition is calculated, and the partition red average signal, the partition green average signal, and the partition blue average signal are obtained.
  • the red and blue gamma adjustments are respectively performed for the red and blue input gamma signals, and the red and blue input gamma signals are adjusted for the red and blue input gamma signals.
  • the red and blue large viewing angle brightness ratios are further decreased relative to the green color, which enhances the green hue large angle of view vividness.
  • the red and blue light source luminance signal compensation can make the front view color maintain the same color, and the original color performance is not affected by the adjustment of the red and blue gamma signals. At the same time, the performance of the original color signal can be maintained and the green color of the large viewing angle can be improved.
  • FIG. 1 is a diagram showing the relationship between color system and color shift of a liquid crystal display device according to an embodiment of the present application before pixel adjustment.
  • FIG. 2 is a diagram showing a relationship between green color shift and gray scale of a liquid crystal display device according to an embodiment of the present application before pixel adjustment.
  • FIG. 3 is a diagram showing relationship between red X, green Y, blue Z, and gray scale of the positive viewing angles R, G, and B of the liquid crystal display device according to the embodiment of the present application before pixel adjustment.
  • FIG. 4 is a relationship diagram of red X, green Y, blue Z, and gray scale of a large viewing angle R, G, and B before liquid crystal display device according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a driving device of a display device according to an embodiment of the present application.
  • FIG. 6 is a flow chart illustrating a driving method of a display device according to an embodiment of the present application.
  • FIG. 7 is a functional structural diagram of a driving device of a display device according to an embodiment of the present application for a display device.
  • the word “comprising” is to be understood to include the component, but does not exclude any other component.
  • “on” means located above or below the target component, and does not mean that it must be on the top based on the direction of gravity.
  • FIG. 1 is a diagram showing the relationship between the color system and the color shift of the liquid crystal display device before the pixel adjustment. It can be seen that the color shift of the large viewing angle and the front view angle of various representative color systems of the liquid crystal display device can be clearly found. The color angle of the red, green and blue primary light modes is biased, and the color shift is more serious than other color systems. Therefore, solving the color shift defects of the red, green and blue phases can greatly improve the overall color shift of the large viewing angle.
  • FIG. 7 is a functional structural diagram of a driving device for a display device according to an embodiment of the present application.
  • the display device 700 includes a driving device 500 for transmitting image signals to the display panel 710.
  • the positive viewing angle and the 60-degree horizontal viewing angle change in the visual character difference under the different color mixing conditions of the green system.
  • the green (G; Gray) gray scale is 255 gray scale
  • the red (Red; R) and blue (Blue; B) gray scales are between 20 and 180 gray scales
  • the red and blue grayscale signals are more gray. Low, the color shift of the green hue is more serious.
  • the red and blue gray scales are between 10 and 180 gray scales, and the lower the red and blue gray scale signals, the more serious the color shift of the green hue.
  • the red and blue gray scales are between 10 and 140 gray scales, and the lower the red and blue gray scale signals, the more serious the color shift of the green hue.
  • the red and blue gray scales are between 10 and 80 gray scales, and the lower the red and blue gray scale signals, the more severe the color shift for the green hue.
  • FIG. 3 is a diagram showing the relationship between the red X, the green Y, the blue Z, and the gray scale of the positive viewing angles R, G, and B of the liquid crystal display device according to the embodiment of the present disclosure.
  • FIG. 4 is a liquid crystal display according to an embodiment of the present application. The device displays the red X, green Y, blue Z and gray scale relationship of the large viewing angles R, G, and B before the pixel adjustment.
  • the positive viewing angle mixed color gray scale is R 50 gray scale, G 160 gray scale, B 50 gray scale, corresponding to the positive viewing angle red X, green Y, blue Z and full gray scale R 255, G 255, B 255 gray scale
  • the ratio is 3%, 36%, 3% mixed color.
  • R 255, G 255, B 255 gray scale ratio is 22%, 54%, 28% color mixing, positive viewing angle mixed color and large viewing angle mixed color red X,
  • the ratios of green Y and blue Z are different, so that the original positive viewing angles of red X and blue Z are relatively small compared to the green Y brightness ratio.
  • the large viewing angles of red X and blue Z are not negligible compared to the green Y brightness ratio, resulting in a large viewing angle.
  • the angle of view is green and the color is noticeable.
  • FIG. 5 is a schematic diagram of a driving device of a display device according to an embodiment of the present application.
  • the display device includes a driving device 500 of the display device that transmits image signals to the display panel 710.
  • the driving device 500 includes a plurality of red, green and blue sub-pixels. Each of the red, green and blue sub-pixels is called a pixel unit, and each pixel unit represents an image signal.
  • the present application divides the liquid crystal display device into a plurality of partitions, each partition is composed of It is composed of a plurality of pixel units, and the partition size can be defined by itself. On the liquid crystal display device, it can be divided into column multiplication lines (N*M) and a plurality of partitions composed of pixel units.
  • N*M column multiplication lines
  • the driving device of the display device of the present application uses the average signal of all the sub-pixel units in the calculation partition to obtain the partition red average signal, the partition green average signal, the partition blue average signal, and then according to the red, green and blue average signals.
  • the gray scale corresponds to the pre-defined range, and the red and blue gamma signals are respectively adjusted, and the brightness adjustment is performed in combination with the red and blue LED light sources of each partition, so that the correctness of the color can be maintained and the defect of the visual character deviation can be solved.
  • the gray level of the average signal when the gray level of the partition green average signal is between a first value gray scale of a predefined range, and the gray scale of the partition red average signal, the partition blue The gray level of the average signal is between a second value gray scale of a predefined range, then the red and blue gamma ( ⁇ ) are adjusted from the original ⁇ R, ⁇ B to ⁇ R1, ⁇ B1, wherein ⁇ R1> ⁇ R, ⁇ B1> ⁇ B;
  • the first value gray scale and the second value gray scale of the predefined range are selected from the following groups:
  • a first group is when the first value gray scale is between 255 gray scale and 200 gray scale, and the second value gray scale is between 20 gray scale and 180 gray scale;
  • a second group is when the first value gray scale is between 200 gray scale and 150 gray scale, and the second value gray scale is between 10 gray scale and 180 gray scale;
  • a third group is when the first value gray level is between 150 gray scale and 100 gray scale, and the second value gray scale is between 10 gray scale and 140 gray scale;
  • a fourth group is when the first value gray scale is between 100 gray scales to 50 gray scales, and the second value gray scale is between 10 gray scales to 80 gray scales;
  • a fifth group is when the first value gray scale is between 50 gray scales to 0 gray scales, and the second value gray scale is between 10 gray scales to 40 gray scales.
  • the red and blue gamma are adjusted, and the red and blue gray levels correspond to a decrease in brightness, and the brightness drop calculation formula is:
  • L'R(g) LR(255)*(g/255) ⁇ R1
  • L'B(g) LB(255)*(g/255) ⁇ B1
  • g gray scale represents arbitrary gray scale.
  • the adjusting corresponding to the red light source brightness calculation formula is:
  • m_R is the adjusted red light source luminance signal
  • An m_R is the initial red light source luminance signal
  • Ave_Rn m is the average signal of the red sub-pixel unit in the calculation partition.
  • m_B is the adjusted blue light source brightness signal
  • An m_B is the initial blue light source brightness signal
  • Ave_Bn m is the average signal of the blue sub-pixel unit in the calculation partition
  • n, m is the column where the partition is located With lines.
  • FIG. 6 is a flow chart illustrating a driving method of a display device according to an embodiment of the present application, with reference to the following description.
  • Step S101 Calculate an average signal of all sub-pixel units (Rn, m_i, j, Gn, m_i, j, Bn, m_i, j) in a partition (n, m) to obtain a partition red average signal (Ave_Rn, m) ), a partition green average signal (Ave_Gn, m), a partition blue average signal (Ave_Bn, m), where i, j are pixel units within the n, m partition.
  • red and blue gamma adjustments are respectively performed according to the gray scales of the red, green and blue average signals corresponding to the predefined ranges; finally, step S103: adjusting the brightness of the corresponding red and blue light sources.
  • the gray level of the partition green average signal is between 255 and 200 gray scales of a predefined range
  • the gray scale of the partition red average signal and the gray level of the partition blue average signal are between 20 and 180 in a predefined range.
  • the red and blue gamma are adjusted from the original ⁇ R and ⁇ B to ⁇ R1 and ⁇ B1, where ⁇ R1> ⁇ R and ⁇ B1> ⁇ B.
  • the gray scales of the red, green, and blue average signals in step S102 correspond to a predefined range, and when the gray level of the partition green average signal is between 200 and 150 gray scales in a predefined range, And the gray scale of the partition red average signal and the gray scale of the partition blue average signal are between 10 and 180 gray scales in the predefined range, then the red and blue gamma are adjusted from the original ⁇ R and ⁇ B to ⁇ R1 and ⁇ B1, wherein ⁇ R1 > ⁇ R, ⁇ B1> ⁇ B.
  • the gray scales of the red, green, and blue average signals in step S102 correspond to a predefined range, and when the gray level of the partition green average signal is between 150 and 100 gray scales in a predefined range, And the gray scale of the partition red average signal and the gray scale of the partition blue average signal are between 10 and 140 gray scales of a predefined range, then the red and blue gamma are adjusted from the original ⁇ R and ⁇ B to ⁇ R1 and ⁇ B1, wherein ⁇ R1 > ⁇ R, ⁇ B1> ⁇ B.
  • the gray scales of the red, green, and blue average signals in step S102 correspond to a predefined range
  • the gray level of the partition green average signal is between 100 and 50 gray scales of a predefined range
  • the gray level of the partition red average signal and the gray level of the partition blue average signal are between 10 and 80 gray scales in the predefined range
  • the red and blue gamma are adjusted from the original ⁇ R and ⁇ B to ⁇ R1 and ⁇ B1, wherein ⁇ R1 > ⁇ R, ⁇ B1> ⁇ B.
  • the gray scales of the red, green, and blue average signals in step S102 correspond to a predefined range, and when the gray level of the partition green average signal is between 50 and 0 gray scales of a predefined range, And the gray level of the partitioned red average signal and the gray level of the partition blue average signal are between 10 and 40 gray scales in the predefined range, then the red and blue gamma are adjusted from the original ⁇ R and ⁇ B to ⁇ R1 and ⁇ B1, wherein ⁇ R1 > ⁇ R, ⁇ B1> ⁇ B.
  • the red and blue gamma are increased, so that the red and blue gray levels correspond to the brightness decrease, and the brightness drop is calculated as follows:
  • g gray scale represents any gray scale.
  • the present application further provides another embodiment to describe a driving method of the display device. Please refer to FIG. 5.
  • the backlight and display device are divided into columns (N) * rows (M) of multiple partitions, each partition (n, m) has independent R, G, B LED light sources.
  • the initial luminance signals of the R, G, and B LEDs in the partition (n, m) are An, m_R, An, m_G, An, m_B.
  • the red and blue gamma are adjusted from the original ⁇ R and ⁇ B to ⁇ R1.
  • the red and blue LED luminance signal compensation can make the front view color maintain the same color, and the original color performance is not affected by the adjustment of the red and blue gamma signals.
  • the embodiment of the present application further provides a display device 700 including a display panel 710 and the above-described driving device 500 of the display device.
  • the average signal, the partitioned green average signal, the partitioned blue average signal, and the gray scale corresponding to the red, green, and blue average signals correspond to the predefined ranges, respectively performing red and blue gamma adjustments; for red and blue input gamma
  • the signal adjustment increases the red and blue input gamma signals, so that the red and blue large viewing angle brightness ratios are further decreased relative to the green color, and the green hue large angle of view vividness is improved.
  • the red and blue light source luminance signal compensation can make the front view color maintain the same color, and the original color performance is not affected by the adjustment of the red and blue gamma signals. At the same time, the performance of the original color signal can be maintained and the green color of the large viewing angle can be improved.

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Abstract

本申请关于一种显示装置的驱动方法、驱动装置及显示装置，透过计算分区内的所有子像素单元的平均信号，得出分区红色平均信号、分区绿色平均信号、分区蓝色平均信号，再依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整，使得红色、蓝色大视角亮度比例进一步相对于绿色下降，提升绿色色相大视角鲜艳度。再透过红色、蓝色光源亮度信号补偿可以使得正视色彩维持原来相同的颜色，不会因为红色、蓝色伽马信号的调整而使得原色彩表现受到影响。同时可以达到维持原色彩信号表现并且可以提高大视角绿色色彩鲜艳度。

Description

显示装置的驱动方法、驱动装置及显示装置 技术领域
本申请涉及显示领域，尤其涉及一种显示装置的驱动方法、驱动装置及显示装置。
背景技术
液晶显示装置(Liquid-Crystal Display；LCD)为平面薄型的显示装置，由一定数量的彩色或黑白画素组成，放置于光源或者反射面前方。每个画素由以下几个部分构成：悬浮于两个透明电极间的一列液晶分子层，两边外侧有两个偏振方向互相垂直的偏振过滤片。如果没有电极间的液晶，光通过其中一个偏振过滤片其偏振方向将和第二个偏振片完全垂直，因此被完全阻挡了。但是如果通过一个偏振过滤片的光线偏振方向被液晶旋转，那么它就可以通过另一个偏振过滤片。液晶对光线偏振方向的旋转可以通过静电场控制，从而实现对光的控制。
在将电荷加到透明电极之前，液晶分子的排列被电极表面的排列决定，电极的化学物质表面可作为晶体的晶种。在最常见的扭转向列型(TN)液晶中，液晶上下两个电极垂直排列。液晶分子螺旋排列，通过一个偏振过滤片的光线在通过液晶片后偏振方向发生旋转，从而能够通过另一个偏振片。在此过程中一小部分光线被偏振片阻挡，从外面看上去是灰色。将电荷加到透明电极上后，液晶分子将几乎完全顺着电场方向平行排列，因此透过一个偏振过滤片的光线偏振方向没有旋转，因此光线被完全阻挡了。此时画素看上去是黑色。通过控制电压，可以控制液晶分子排列的扭曲程度，从而达到不同的灰度。
由于液晶本身没有颜色，所以用彩色滤光片产生各种颜色，是液晶显示装置由灰阶变为彩色的关键零组件，藉由LCD内部的背光模块提供光源，再搭配驱动IC与液晶控制形成灰阶显示，将光源穿过彩色滤光片的光阻彩色层形成彩色显示画面。
发明内容
液晶显示装置中彩色滤光片常用光阻彩色层可以是红绿蓝三原色光模式(Red,Green,Blue；红绿蓝color model)或是青洋红黄三原色光模式Cyan,Magenta,Yellow；CMY color model)两种模式。
因为液晶显示装置会由于折射率与波长相关性，不同波长穿透率与相位延迟相关，呈现穿透率与波长有不同程度的表现，并且随着电压驱动，不同波长相位延迟亦会产生不同程度的变化影响不同波长的穿透率表现。
本申请的目的即在于提供一种显示装置的驱动方法，包括以下步骤：
计算一分区内的所有子像素单元的平均信号，得出一分区红色平均信号、一分区绿色平均信号、 一分区蓝色平均信号；依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整；最后，调整对应红色、蓝色光源亮度。
在本申请的实施例中，当分区绿色平均信号的灰阶介于预先定义范围的一第一值灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的一第二值灰阶，则调整红色及蓝色伽马(γ)由原先γR、γB调整为γR1、γB1，其中γR1>γR、γB1>γB。
在一实施例中，其中预先定义范围的第一值灰阶与第二值灰阶，选自以下群组：
一第一群组为当第一值灰阶介于255灰阶至200灰阶之间，则第二值灰阶介于20灰阶至180灰阶之间；
一第二群组为当第一值灰阶介于200灰阶至150灰阶之间，则第二值灰阶介于10灰阶至180灰阶之间；
一第三群组为当第一值灰阶介于150灰阶至100灰阶之间，则第二值灰阶介于10灰阶至140灰阶之间；
一第四群组为当第一值灰阶介于100灰阶至50灰阶之间，则第二值灰阶介于10灰阶至80灰阶之间；
一第五群组为当第一值灰阶介于50灰阶至0灰阶之间，则第二值灰阶介于10灰阶至40灰阶之间。
为了解决上述红、绿、蓝色相的色偏问题，本申请的又一目的即在于提供一种显示装置的驱动装置，包含至少一个分区，每一分区由多个像素单元组成，每一像素单元由一红色子像素单元、一绿色子像素单元及一蓝色子像素单元构成，包括：计算一分区内的所有子像素单元的平均信号，得出一分区红色平均信号、一分区绿色平均信号、一分区蓝色平均信号；依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整；最后，调整对应红色、蓝色光源亮度。
为了解决上述红、绿、蓝色相的色偏问题，本申请的又一目的即在于提供一种显示装置，包括显示面板，及上述的显示装置的驱动装置，其中，所述驱动装置传送影像信号至所述显示面板。
透过本申请中绿色色相大视角色偏改善灰阶驱动方式，透过计算分区内的所有子像素单元的平均信号，得出分区红色平均信号、分区绿色平均信号、分区蓝色平均信号，再依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整，对于红色、蓝色输入伽马信号调整将红色、蓝色输入伽马信号调大，使得红色、蓝色大视角亮度比例进一步相对于绿色下降，提升绿色色相大视角鲜艳度。再透过红色、蓝色光源亮度信号补偿可以使得正视色彩维持原来相同的颜色，不会因为红色、蓝色伽马信号的调整而使得原色彩表现受到影响。同时可以达到维持原色彩信号表现并且可以提高大视角绿色色彩鲜艳度。
附图说明
图1是本申请实施例提供的液晶显示装置在像素调整之前的色系与色偏关系图。
图2是本申请实施例提供的液晶显示装置在像素调整之前的绿色色偏与灰阶关系图。
图3是本申请实施例提供的液晶显示装置在像素调整之前的正视角R、G、B的红X、绿Y、蓝Z与灰阶关系图。
图4是本申请实施例提供的液晶显示装置在像素调整之前的大视角R、G、B的红X、绿Y、蓝Z与灰阶关系图。
图5是本申请实施例提供的显示装置的驱动装置示意图。
图6是本申请提供的一实施例说明一种显示装置的驱动方法的流程图。
图7是本申请实施例提供的显示装置的驱动装置用于显示装置的功能结构图。
具体实施方式
以下各实施例的说明是参考附加的图式，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如「上」、「下」、「前」、「后」、「左」、「右」、「内」、「外」、「侧面」等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。
附图和说明被认为在本质上是示出性的，而不是限制性的。在图中，结构相似的单元是以相同标号表示。另外，为了理解和便于描述，附图中示出的每个组件的尺寸和厚度是任意示出的，但是本申请不限于此。
在附图中，为了清晰起见，夸大了层、膜、面板、区域等的厚度。在附图中，为了理解和便于描述，夸大了一些层和区域的厚度。可以理解的是，当例如层、膜、区域或基底的组件被称作“在”另一组件“上”时，所述组件可以直接在所述另一组件上，或者也可以存在中间组件。
另外，在说明书中，除非明确地描述为相反的，否则词语“包括”将被理解为意指包括所述组件，但是不排除任何其它组件。此外，在说明书中，“在......上”意指位于目标组件上方或者下方，而不意指必须位于基于重力方向的顶部上。
为更进一步阐述本申请为达成预定发明目的所采取的技术手段及功效，以下结合附图及较佳实施例，对依据本申请提出的显示装置的驱动方法、驱动装置及显示装置，其具体实施方式、结构、特征及其功效，详细说明如后。
请参考图1，图1是液晶显示装置在像素调整之前的色系与色偏关系图，可看出液晶显示装置各种代表性色系的大视角与正视视角的色偏变化，可以明显发现偏向采用红绿蓝三原色光模式的色系大视角，其色偏情况均较其他色系来得严重，因此解决红、绿、蓝色相的色偏缺陷可以大大改善大 视角的整体色偏程度。
图2是本申请实施例提供的液晶显示装置在像素调整之前的绿色色偏与灰阶关系图。并请同时参考图7，图7是本申请实施例提供的显示装置的驱动装置用于显示装置的功能结构图。如图7所示，显示装置700包括一驱动装置500，传送影像信号至显示面板710。如图2所示，正视角与60度水平视角在绿色系不同混色条件下的视角色差变化情形。当绿色(Green；G)灰阶(Gray)为255灰阶时，红色(Red；R)、蓝色(Blue；B)灰阶介于20～180灰阶，红色、蓝色灰阶信号越低，该绿色色相的色偏越严重。
当绿色灰阶为200灰阶时，红色、蓝色灰阶介于10～180灰阶，红色、蓝色灰阶信号越低，该绿色色相的色偏越严重。
当绿色灰阶为160灰阶时，红色、蓝色灰阶介于10～140灰阶，红色、蓝色灰阶信号越低，该绿色色相的色偏越严重。
当绿色灰阶为100灰阶时，红色、蓝色灰阶介于10～80灰阶，红色、蓝色灰阶信号越低，对于该绿色色相的色偏越严重。
色偏的原因请参考图3、图4及以下说明。图3是本申请实施例提供的液晶显示装置在像素调整之前的正视角R、G、B的红X、绿Y、蓝Z与灰阶关系图，图4是本申请实施例提供的液晶显示装置在像素调整之前的大视角R、G、B的红X、绿Y、蓝Z与灰阶关系图。
举例说明，当正视角混色灰阶为R 50灰阶、G 160灰阶、B 50灰阶，对应正视角红X、绿Y、蓝Z与全灰阶R 255、G 255、B 255灰阶比例为3％、36％、3％混色。
对应大视角红X、绿Y、蓝Z与大视角全灰阶R 255、G 255、B 255灰阶比例为22％,54％,28％混色，正视角混色与大视角混色的红X、绿Y、蓝Z比例不同，使得原先正视角红X、蓝Z相较于绿Y亮度比例相当小，大视角红X、蓝Z相较于绿Y亮度比例无法忽视，造成大视角不若正视角绿色色相，明显色偏。
图5是本申请实施例提供的显示装置的驱动装置示意图。显示装置包括一显示装置的驱动装置500，传送影像信号至显示面板710。驱动装置500含有多个红绿蓝子像素，每一组红绿蓝子像素我们叫做一像素单元，每一像素单元代表一个影像信号，本申请将液晶显示装置分成多个分区，每个分区由多个像素单元构成，分区大小可以自行定义，在液晶显示装置上可分成列乘行(N*M)、多个由像素单元构成的分区。
本申请显示装置的驱动装置是运用计算分区内的所有子像素单元的平均信号，得出分区红色平均信号、分区绿色平均信号、分区蓝色平均信号，再依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马信号调整，并结合各分区红色、蓝色LED光源进行亮度调 整，可以维持正看色彩的正确性并且解决视角色偏的缺陷。
在本发明的一实施例中，所述平均信号的灰阶，当分区绿色平均信号的灰阶介于预先定义范围的一第一值灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的一第二值灰阶，则调整红色及蓝色伽马(γ)由原先γR、γB调整为γR1、γB1，其中γR1>γR、γB1>γB；
其中，所述预先定义范围的第一值灰阶与第二值灰阶，选自以下群组：
一第一群组为当第一值灰阶介于255灰阶至200灰阶之间，第二值灰阶介于20灰阶至180灰阶之间；
一第二群组为当第一值灰阶介于200灰阶至150灰阶之间，第二值灰阶介于10灰阶至180灰阶之间；
一第三群组为当第一值灰阶介于150灰阶至100灰阶之间，第二值灰阶介于10灰阶至140灰阶之间；
一第四群组为当第一值灰阶介于100灰阶至50灰阶之间，第二值灰阶介于10灰阶至80灰阶之间；以及
一第五群组为当第一值灰阶介于50灰阶至0灰阶之间，第二值灰阶介于10灰阶至40灰阶之间。
在本发明的一实施例中，所述调整红色及蓝色伽马，红色、蓝色灰阶对应亮度下降，亮度下降计算式为：
L'R(g)＝LR(255)*(g/255) γR1，L'B(g)＝LB(255)*(g/255) γB1，其中，g灰阶代表任意灰阶。
在本发明的一实施例中，所述调整对应红色光源亮度计算式为：
A'n,m_R/An,m_R＝LR(Ave_Rn,m)/L'R(Ave_Rn,m)
＝LR(255)*(Ave_Rn,m/255) γR/LR(255)*(Ave_Rn,m/255) γR1；
所述调整对应蓝色光源亮度计算式为：
A'n,m_B/An,m_B＝LB(Ave_Bn,m)/L'B(Ave_Bn,m)
＝LB(255)*(Ave_Bn,m/255) γB/LB(255)*(Ave_Bn,m/255) γB1；
其中，A'n,m_R为调整后的红色光源亮度信号，An,m_R为初始红色光源亮度信号，Ave_Rn,m为计算分区内红色子像素单元的平均信号，
A'n,m_B为调整后的蓝色光源亮度信号，An,m_B为初始蓝色光源亮度信号，Ave_Bn,m为计算分区内蓝色子像素单元的平均信号，n、m为分区所在的列与行。
图6是本申请提供的一实施例说明显示装置的驱动方法的流程图，参考如下说明。
步骤S101：计算一分区(n,m)内的所有子像素单元(Rn,m_i,j，Gn,m_i,j，Bn,m_i,j)的平均信号，得出分区红色平均信号(Ave_Rn,m)、分区绿色平均信号(Ave_Gn,m)、分区蓝色平均信号(Ave_Bn,m), 其中i,j为该n,m分区内的像素单元。接着，步骤S102：依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整；最后，步骤S103：调整对应红色、蓝色光源亮度。
举例说明，例如当分区绿色平均信号的灰阶介于预先定义范围的255～200灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的20～180灰阶，则调整红色、蓝色伽马(gamma；γ)由原先γR、γB调整为γR1、γB1，其中γR1>γR、γB1>γB。
在本申请另一实施例中，步骤S102中的红色、绿色及蓝色平均信号的灰阶对应预先定义范围为，当分区绿色平均信号的灰阶介于预先定义范围的200～150灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的10～180灰阶，则调整红色、蓝色伽马由原先γR、γB调整为γR1、γB1，其中γR1>γR、γB1>γB。
在本申请另一实施例中，步骤S102中的红色、绿色及蓝色平均信号的灰阶对应预先定义范围为，当分区绿色平均信号的灰阶介于预先定义范围的150～100灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的10～140灰阶，则调整红色、蓝色伽马由原先γR、γB调整为γR1、γB1，其中γR1>γR、γB1>γB。
在本申请另一实施例中，步骤S102中的红色、绿色及蓝色平均信号的灰阶对应预先定义范围为，当分区绿色平均信号的灰阶介于预先定义范围的100～50灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的10～80灰阶，则调整红色、蓝色伽马由原先γR、γB调整为γR1、γB1，其中γR1>γR、γB1>γB。
在本申请另一实施例中，步骤S102中的红色、绿色及蓝色平均信号的灰阶对应预先定义范围为，当分区绿色平均信号的灰阶介于预先定义范围的50～0灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的10～40灰阶，则调整红色、蓝色伽马由原先γR、γB调整为γR1、γB1，其中γR1>γR、γB1>γB。
前述各实施例中，调整后，红色、蓝色伽马提高，会使得红色、蓝色灰阶对应亮度下降，亮度下降计算式如下：
L'R(g)＝LR(255)*(g/255) γR1，其小于LR(g)＝LR(255)*(g/255) γR，
L'B(g)＝LB(255)*(g/255) γB1，其小于LB(g)＝LB(255)*(g/255) γB，
其中g灰阶代表任意灰阶。
本申请更提供另一实施例说明显示装置的驱动方法，请参考图5。当本申请采用直下式LED背光，该背光同显示装置分成列(N)*行(M)多个分区，每一分区(n,m)有独立的R、G、B LED光源。分区(n,m)内的R、G、B LED初始亮度信号为An,m_R、An,m_G、An,m_B，为了补偿因为调高红色、 蓝色伽马由原先γR、γB调整为γR1、γB1，其中γR1>γR、γB1>γB造成的亮度下降为L'R(g)＝LR(255)*(g/255) γR1<LR(g)＝LR(255)*(g/255) γR，以及
L'B(g)＝LB(255)*(g/255) γB1<LB(g)＝LB(255)*(g/255) γB，调整该区的红色、蓝色LED亮度信号上升为A'n,m_R、A'n,m_B。
其中红(R)的亮度调伸比例计算式为：
A'n,m_R/An,m_R＝LR(Ave_Rn,m)/L'R(Ave_Rn,m)
＝LR(255)*(Ave_Rn,m/255) γR/LR(255)*(Ave_Rn,m/255) γR1。
并且，蓝(B)的亮度调伸比例计算式为：
A'n,m_B/An,m_B＝LB(Ave_Bn,m)/L'B(Ave_Bn,m)
＝LB(255)*(Ave_Bn,m/255) γB/LB(255)*(Ave_Bn,m/255) γB1。
在本实施例中，透过红色、蓝色LED亮度信号补偿可以使得正视色彩维持原来相同的颜色，不会因为红色、蓝色伽马信号的调整而使得原色彩表现受到影响。
本申请实施例还提供一种显示装置700，包括显示面板710，以及上述的显示装置的驱动装置500。
采用本申请显示装置的驱动方法及显示装置的驱动装置的显示装置，其中的绿色色相大视角色偏改善灰阶驱动方式，透过计算分区内的所有子像素单元的平均信号，得出分区红色平均信号、分区绿色平均信号、分区蓝色平均信号，再依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整；对于红色、蓝色输入伽马信号调整将红色、蓝色输入伽马信号调大，使得红色、蓝色大视角亮度比例进一步相对于绿色下降，提升绿色色相大视角鲜艳度。再透过红色、蓝色光源亮度信号补偿可以使得正视色彩维持原来相同的颜色，不会因为红色、蓝色伽马信号的调整而使得原色彩表现受到影响。同时可以达到维持原色彩信号表现并且可以提高大视角绿色色彩鲜艳度。
“在本申请一实施例中”与“在各种实施例中”等用语被重复地使用。所述用语通常不是指相同的实施例；但它亦可以是指相同的实施例。“包含”、“具有”及“包括”等用词是同义词，除非其前后文意显示出其它意思。
以上所述，仅是本申请的较佳实施例而已，并非对本申请作任何形式上的限制，虽然本申请已以较佳实施例揭露如上，然而并非用以限定本申请，任何熟悉本专业的技术人员，在不脱离本申请技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本申请技术方案的内容，依据本申请的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属本申请技术方案的范围内。

Claims (20)

  1. 一种显示装置的驱动方法，包括以下步骤：
    计算一分区内的所有子像素单元的平均信号，得出一分区红色平均信号、一分区绿色平均信号、一分区蓝色平均信号；
    依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整；以及
    调整对应红色、蓝色光源亮度。
  2. 如权利要求1所述的显示装置的驱动方法，其中，所述平均信号的灰阶，当分区绿色平均信号的灰阶介于预先定义范围的一第一值灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的一第二值灰阶，则调整红色及蓝色伽马(γ)由原先γR、γB调整为γR1、γB1，γR1>γR、γB1>γB。
  3. 如权利要求2所述的显示装置的驱动方法，其中，所述预先定义范围的第一值灰阶与第二值灰阶，选自以下群组：
    一第一群组为当第一值灰阶介于255灰阶至200灰阶之间，则第二值灰阶介于20灰阶至180灰阶之间；
    一第二群组为当第一值灰阶介于200灰阶至150灰阶之间，则第二值灰阶介于10灰阶至180灰阶之间；
    一第三群组为当第一值灰阶介于150灰阶至100灰阶之间，则第二值灰阶介于10灰阶至140灰阶之间；
    一第四群组为当第一值灰阶介于100灰阶至50灰阶之间，则第二值灰阶介于10灰阶至80灰阶之间；以及
    一第五群组为当第一值灰阶介于50灰阶至0灰阶之间，则第二值灰阶介于10灰阶至40灰阶之间。
  4. 如权利要求2所述的显示装置的驱动方法，其中，所述调整红色及蓝色伽马，红色、蓝色灰阶对应亮度下降，亮度下降计算式为：
    L'R(g)＝LR(255)*(g/255) γR1，以及
    L'B(g)＝LB(255)*(g/255) γB1。
  5. 如权利要求4所述的显示装置的驱动方法，其中，g灰阶代表任意灰阶。
  6. 如权利要求4所述的显示装置的驱动方法，其中，所述调整对应红色光源亮度计算式为：
    A'n,m_R/An,m_R＝LR(Ave_Rn,m)/L'R(Ave_Rn,m)
    ＝LR(255)*(Ave_Rn,m/255) γR/LR(255)*(Ave_Rn,m/255) γR1；
    其中，A'n,m_R为调整后的红色光源亮度信号，An,m_R为初始红色光源亮度信号，Ave_Rn,m为计算分区内所有红色子像素单元的平均信号，n、m为分区所在的列与行。
  7. 如权利要求4所述的显示装置的驱动方法，其中，所述调整对应蓝色光源亮度计算式为：
    A'n,m_B/An,m_B＝LB(Ave_Bn,m)/L'B(Ave_Bn,m)
    ＝LB(255)*(Ave_Bn,m/255) γB/LB(255)*(Ave_Bn,m/255) γB1；
    其中，A'n,m_B为调整后的蓝色光源亮度信号，An,m_B为初始蓝色光源亮度信号，Ave_Bn,m为计算分区内所有蓝色子像素单元的平均信号，n、m为分区所在的列与行。
  8. 一种显示装置的驱动装置，包含至少一个分区，每一分区由多个像素单元组成，每一像素单元由一红色子像素单元、一绿色子像素单元及一蓝色子像素单元构成，包括：
    计算一分区内的所有子像素单元的平均信号，得出一分区红色平均信号、一分区绿色平均信号、一分区蓝色平均信号；
    依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整；以及
    调整对应红色、蓝色光源亮度。
  9. 如权利要求8所述的显示装置的驱动装置，其中，所述平均信号的灰阶，当分区绿色平均信号的灰阶介于预先定义范围的一第一值灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的一第二值灰阶，则调整红色及蓝色伽马(γ)由原先γR、γB调整为γR1、γB1，γR1>γR、γB1>γB。
  10. 如权利要求9所述的显示装置的驱动装置，其中，所述预先定义范围的第一值灰阶与第二值灰阶，选自以下群组：
    一第一群组为当第一值灰阶介于255灰阶至200灰阶之间，则第二值灰阶介于20灰阶至180灰阶之间；
    一第二群组为当第一值灰阶介于200灰阶至150灰阶之间，则第二值灰阶介于10灰阶至180灰阶之间；
    一第三群组为当第一值灰阶介于150灰阶至100灰阶之间，则第二值灰阶介于10灰阶至140灰阶之间；
    一第四群组为当第一值灰阶介于100灰阶至50灰阶之间，则第二值灰阶介于10灰阶至80灰阶之间；以及
    一第五群组为当第一值灰阶介于50灰阶至0灰阶之间，则第二值灰阶介于10灰阶至40灰阶之间。
  11. 如权利要求10所述的显示装置的驱动装置，其中，所述调整红色及蓝色伽马，红色、蓝色灰阶 对应亮度下降，亮度下降计算式为：
    L'R(g)＝LR(255)*(g/255) γR1，L'B(g)＝LB(255)*(g/255) γB1，g灰阶代表任意灰阶。
  12. 如权利要求10所述的显示装置的驱动装置，其中，所述调整对应红色光源亮度计算式为：
    A'n,m_R/An,m_R＝LR(Ave_Rn,m)/L'R(Ave_Rn,m)
    ＝LR(255)*(Ave_Rn,m/255) γR/LR(255)*(Ave_Rn,m/255) γR1；
    其中，A'n,m_R为调整后的红色光源亮度信号，An,m_R为初始红色光源亮度信号，Ave_Rn,m为计算分区内所有红色子像素单元的平均信号，n、m为分区所在的列与行。
  13. 如权利要求10所述的显示装置的驱动装置，其中，所述调整对应蓝色光源亮度计算式为：
    A'n,m_B/An,m_B＝LB(Ave_Bn,m)/L'B(Ave_Bn,m)
    ＝LB(255)*(Ave_Bn,m/255) γB/LB(255)*(Ave_Bn,m/255) γB1；
    其中，A'n,m_B为调整后的蓝色光源亮度信号，An,m_B为初始蓝色光源亮度信号，Ave_Bn,m为计算分区内所有蓝色子像素单元的平均信号，n、m为分区所在的列与行。
  14. 一种显示装置，包括：
    显示面板；
    驱动装置，包含至少一个分区，每一分区由多个像素单元组成，每一像素单元由一红色子像素单元、一绿色子像素单元及一蓝色子像素单元构成，包括：
    计算一分区内的所有子像素单元的平均信号，得出一分区红色平均信号、一分区绿色平均信号、一分区蓝色平均信号；
    依据红色、绿色及蓝色平均信号的灰阶对应预先定义范围，分别执行红色、蓝色伽马调整；以及
    调整对应红色、蓝色光源亮度。
  15. 如权利要求14所述的显示装置，其中，所述平均信号的灰阶，当分区绿色平均信号的灰阶介于预先定义范围的一第一值灰阶，且分区红色平均信号的灰阶、分区蓝色平均信号的灰阶介于预先定义范围的一第二值灰阶，则调整红色及蓝色伽马(γ)由原先γR、γB调整为γR1、γB1，γR1>γR、γB1>γB。
  16. 如权利要求15所述的显示装置，其中，所述预先定义范围的第一值灰阶与第二值灰阶，选自以下群组：
    一第一群组为当第一值灰阶介于255灰阶至200灰阶之间，则第二值灰阶介于20灰阶至180灰阶之间；
    一第二群组为当第一值灰阶介于200灰阶至150灰阶之间，则第二值灰阶介于10灰阶至180灰阶之间；
    一第三群组为当第一值灰阶介于150灰阶至100灰阶之间，则第二值灰阶介于10灰阶至140灰阶之间；
    一第四群组为当第一值灰阶介于100灰阶至50灰阶之间，则第二值灰阶介于10灰阶至80灰阶之间；以及
    一第五群组为当第一值灰阶介于50灰阶至0灰阶之间，则第二值灰阶介于10灰阶至40灰阶之间。
  17. 如权利要求16所述的显示装置，其中，所述调整红色及蓝色伽马，红色、蓝色灰阶对应亮度下降，亮度下降计算式为：
    L'R(g)＝LR(255)*(g/255) γR1，L'B(g)＝LB(255)*(g/255) γB1，其中，g灰阶代表任意灰阶。
  18. 如权利要求16所述的显示装置，其中，所述调整对应红色光源亮度计算式为：
    A'n,m_R/An,m_R＝LR(Ave_Rn,m)/L'R(Ave_Rn,m)
    ＝LR(255)*(Ave_Rn,m/255) γR/LR(255)*(Ave_Rn,m/255) γR1；
    其中，A'n,m_R为调整后的红色光源亮度信号，An,m_R为初始红色光源亮度信号，Ave_Rn,m为计算分区内所有红色子像素单元的平均信号，n、m为分区所在的列与行。
  19. 如权利要求16所述的显示装置，其中，所述调整对应蓝色光源亮度计算式为：
    A'n,m_B/An,m_B＝LB(Ave_Bn,m)/L'B(Ave_Bn,m)
    ＝LB(255)*(Ave_Bn,m/255) γB/LB(255)*(Ave_Bn,m/255) γB1；
    其中，A'n,m_B为调整后的蓝色光源亮度信号，An,m_B为初始蓝色光源亮度信号，Ave_Bn,m为计算分区内所有蓝色子像素单元的平均信号，n、m为分区所在的列与行。
  20. 如权利要求14所述的显示装置，其中，所述驱动装置传送影像信号至所述显示面板。
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