WO2018014376A1 - 显示装置的白平衡调整方法及其*** - Google Patents

显示装置的白平衡调整方法及其*** Download PDF

Info

Publication number
WO2018014376A1
WO2018014376A1 PCT/CN2016/093188 CN2016093188W WO2018014376A1 WO 2018014376 A1 WO2018014376 A1 WO 2018014376A1 CN 2016093188 W CN2016093188 W CN 2016093188W WO 2018014376 A1 WO2018014376 A1 WO 2018014376A1
Authority
WO
WIPO (PCT)
Prior art keywords
white balance
gray scale
relationship curve
relationship
curve
Prior art date
Application number
PCT/CN2016/093188
Other languages
English (en)
French (fr)
Inventor
陈黎暄
Original Assignee
深圳市华星光电技术有限公司
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 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US15/128,986 priority Critical patent/US10339878B2/en
Publication of WO2018014376A1 publication Critical patent/WO2018014376A1/zh

Links

Images

Classifications

    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/202—Gamma control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/643—Hue control means, e.g. flesh tone control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/73—Colour balance circuits, e.g. white balance circuits or colour temperature control
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a white balance adjustment method of a display device and a system thereof.
  • a liquid crystal display or LCD (Liquid Crystal Display) is a flat, ultra-thin display device composed of a certain number of color or black-and-white pixels placed in front of a light source or a reflector.
  • LCD monitors have low power consumption and are characterized by high image quality, small size, and light weight. Therefore, they are favored by everyone and become the mainstream of displays.
  • the GAMMA reference voltage generation circuit is an important part of the liquid crystal display and plays a vital role in the gray scale adjustment of the liquid crystal display.
  • the function of the GAMMA reference voltage generating circuit is to set the GAMMA reference voltage according to the required gamma curve as a reference voltage for gray scale display of the liquid crystal display.
  • Each GAMMA reference voltage is input to a signal driving circuit of the liquid crystal display, and a digital-to-analog converter of the signal driving circuit generates all gray voltages so that the gray scale and transmittance curves of the liquid crystal display conform to the required gamma curve.
  • Figure 1 shows the design structure of the common 7-pair GAMMA voltage generation module. The figure shows three pairs of binding points.
  • the binding points GMA1 and GMA14, GMA2 and GMA13, and GMA8 and GMA9 are each a pair. .
  • each gray scale is divided by the internal fixed resistor string structure, and output through the digital-to-analog converter 1 and the output buffer 2.
  • Each pair of tie points includes +/- two polarity GAMMA voltages, and the two GAMMA voltages (V0 to V255, V0' to V255') are symmetrical with respect to the common voltage (Vcom).
  • FIG. 2 shows a graph corresponding to an initial white balance lookup table (Look-Up-Table, LUT), where the abscissa indicates the gray scale n corresponding to the input signal, and the ordinate indicates the corresponding The actual gray scales Rn, Gn, Bn output by the three colors of red, green and blue.
  • 3 is a graph in which the actual gray scales of the three colors of red, green, and blue in FIG. 2 are converted into corresponding gray scale voltages.
  • the abscissa indicates the gray scale n corresponding to the input signal
  • the ordinate indicates Corresponding gray-scale voltages V Rn , V Gn , V Bn of the three colors of red, green and blue.
  • the rate of change of the gray scale voltages of the three colors of red, green, and blue is not the same, that is, after adjusting the GAMMA voltage, V Rn1 : V Gn1 : V Bn1 ⁇ V Rn : V Gn : V Bn , therefore, After adjusting the GAMMA voltage, if the white balance is not re-adjusted, the display chromaticity will drift.
  • the present invention provides a white balance adjustment method for a display device and a system thereof for improving the problem of display chromaticity drift after adjusting the GAMMA voltage.
  • a white balance adjustment method for a display device comprising:
  • the adjusted green pixel white balance component corresponding to each gray scale is calculated
  • a second white balance lookup table is established according to the adjusted red pixel white balance component, the green pixel white balance component, and the blue pixel white balance component.
  • the steps include:
  • the gray scale n is corresponding to any gray scale in the display device.
  • relationship curve Rn-Gn and the relationship curve Bn-Gn are obtained by a polynomial fitting method.
  • the relationship curve Rn-Gn and the relationship curve Bn-Gn are obtained by a cubic polynomial fitting method or a fourth-order polynomial fitting method.
  • the method comprises the steps of:
  • the gray scale n is corresponding to any gray scale in the display device.
  • the relationship curve V Rn -V Gn and the relationship curve V Bn -V Gn are obtained by a polynomial fitting method.
  • the relationship curve V Rn -V Gn and the relationship curve V Bn -V Gn are obtained by a cubic polynomial fitting method or a fourth-order polynomial fitting method.
  • the gray scale n is 0 to 255.
  • the present invention also provides a white balance adjustment system that adjusts the white balance of the display device using the white balance adjustment method as described above, wherein the white balance adjustment system includes:
  • a white balance relationship establishing module prestores an initial white balance lookup table; the white balance relationship establishing module further establishes a second white balance search according to the adjusted red pixel white balance component, the green pixel white balance component, and the blue pixel white balance component table;
  • a white balance component acquiring module configured to establish a white balance lookup table stored in the module according to the white balance relationship, and obtain an initial red pixel white balance component, a green pixel white balance component, and a blue pixel white balance component of each grayscale;
  • a data curve fitting module according to the initial red pixel white balance component, the green pixel white balance component, and the blue pixel white balance component, fitting a relationship curve between the red pixel white balance component and the green pixel white balance component , fitting a relationship curve between the blue pixel white balance component and the green pixel white balance component;
  • the white balance component adjustment module calculates an adjusted green pixel white balance component corresponding to each gray scale according to the adjusted GAMMA voltage, and substitutes the adjusted green pixel white balance component into the relationship curve 1 and the relationship curve 2 Obtaining the red pixel white balance component and the blue pixel white balance component of each grayscale adjustment respectively.
  • the white balance adjustment method of the display device and the system thereof provided by the embodiments of the present invention
  • the initial white balance lookup table the initial red pixel white balance component, the green pixel white balance component and the blue pixel white balance component of each gray scale are obtained; then the red pixel white balance component and the green pixel white are fitted.
  • the relationship curve between the equilibrium components is one, and the relationship curve between the blue pixel white balance component and the green pixel white balance component is fitted; after the GAMMA voltage adjustment is performed, the adjusted green pixels corresponding to the gray scales are calculated.
  • the white balance component is based on the green pixel white balance component, and the red pixel white balance component and the blue pixel white balance component of each grayscale adjustment are respectively obtained according to the relationship curve 1 and the relationship curve 2, and the second white balance is established. Lookup table. Therefore, after the GAMMA voltage adjustment, the component ratios of the three colors of red, green, and blue are consistent or nearly the same as the component ratio before the adjustment, and the problem that the display chromaticity shifts after adjusting the GAMMA voltage is improved. Further, by means of data fitting, the amount of data calculation is reduced, and the efficiency of white balance adjustment is provided.
  • FIG. 1 is a schematic structural view of a common GAMMA voltage generating module
  • Figure 2 shows a graph corresponding to the initial white balance lookup table
  • FIG. 3 is a graph after converting actual gray scales of three colors of red, green, and blue as shown in FIG. 2 to corresponding gray scale voltages;
  • Figure 4 is a diagram showing the change of the gray scale voltage when the voltage of the GAMMA tie point changes as shown in Figure 3;
  • FIG. 5 is a flow chart showing the steps of a white balance adjustment method of a display device according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a white balance adjustment system of a display device according to an embodiment of the present invention.
  • Fig. 7 is a relationship curve Rn-Gn and a relationship curve Bn-Gn obtained by fitting in the first embodiment of the present invention.
  • the object of the present invention is to improve the display chromaticity drift after adjusting the GAMMA voltage.
  • the problem of shifting provides a white balance adjustment method of a display device and a system thereof.
  • the white balance adjustment method of the display device includes the following steps:
  • the initial red pixel white balance component, the green pixel white balance component, and the blue pixel white balance component of each gray scale are obtained.
  • the relationship curve between the white pixel balance component of the red pixel and the white balance component of the green pixel is fitted, and the relationship curve between the white balance component of the blue pixel and the white balance component of the green pixel is fitted.
  • the adjusted green pixel white balance component corresponding to each gray scale is calculated.
  • the second white balance lookup table is established according to the adjusted red pixel white balance component, the green pixel white balance component, and the blue pixel white balance component.
  • the display device displays the image in accordance with the obtained second white balance lookup table.
  • the white balance adjustment system of the display device includes a white balance relationship establishing module 10, a white balance component acquiring module 20, a data curve fitting module, and a white balance component adjusting module 40.
  • the white balance relationship establishing module 10 prestores an initial white balance lookup table; the white balance relationship establishing module 10 further adjusts the red pixel white balance component and the green pixel white balance component according to the adjusted white balance component adjustment module 40. And the blue pixel white balance component establishes a second white balance lookup table.
  • the white balance component acquisition module 20 obtains an initial red pixel white balance component, a green pixel white balance component, and a blue pixel white of each gray scale according to the white balance lookup table stored in the white balance relationship establishing module 10. Balance the component.
  • the data curve fitting module 30 fits between the red pixel white balance component and the green pixel white balance component according to the initial red pixel white balance component, the green pixel white balance component, and the blue pixel white balance component.
  • the relationship curve one fitting the relationship curve between the blue pixel white balance component and the green pixel white balance component.
  • the white balance component adjustment module 40 calculates the adjusted green pixel white balance component corresponding to each gray scale according to the adjusted GAMMA voltage, and substitutes the adjusted green pixel white balance component into the relationship curve 1 and the relationship. Curve 2, respectively, obtain the red pixel white balance component and the blue pixel white balance component of each gray scale adjustment.
  • nV Gn curve graph nV Gn Referring to FIG. 3, curve nV Gn acquired by the white balance component module 20 n-Gn conversion curve is obtained.
  • the relationship curve Rn-Gn and the relationship curve Bn-Gn are obtained by a polynomial fitting method, for example, a cubic polynomial fitting method or a fourth-order polynomial fitting method.
  • a quadratic polynomial fitting method is adopted, and the following equation is obtained:
  • the gray level corresponding to the voltage binding point V a is n a
  • the gray level corresponding to the voltage binding point V b is n b
  • the voltage voltage junction points V a and V b are respectively adjusted to V a ' and V b '
  • the gray scale voltage V Gn corresponding to the green gray scale G n between the two voltage binding points changes to V Gn '
  • the gray scale n is an arbitrary gray scale corresponding to the display device.
  • the value of n is 0 to 255.
  • the white balance adjustment is performed.
  • the relationship curve Rn-Gn and the relationship curve Bn-Gn are obtained according to the parameters of the initial white balance lookup table.
  • the changed green gray level Gn' is used as a reference.
  • the red gray scale Rn' and the blue gray scale Bn' are determined, and the proportions of the components of the red, green and blue colors are the same as or close to the ratio of the components before the adjustment, and the improvement is improved.
  • the chrominance drift is displayed.
  • the green brightness corresponding to the same gray level> red brightness> blue brightness so the parameter of the green pixel is selected as the reference, which reduces the computational complexity and improves the accuracy.
  • the relationship curve V Rn -V Gn and the relationship curve V Bn -V Gn are obtained by a polynomial fitting method, such as a cubic polynomial fitting method or a fourth-order polynomial fitting method.
  • the gray scale n is an arbitrary gray scale corresponding to the display device.
  • the value of n is 0 to 255.
  • the white balance adjustment is performed, and the relationship curve V Rn -V Gn and the relationship curve V Bn -V Gn are obtained according to the parameters of the initial white balance lookup table, and after the GAMMA voltage adjustment is performed, the changed green gray scale voltage is obtained.
  • V Gn ' is used as a reference, and then the red gray scale voltage V Rn ' and the blue gray scale voltage V Bn ' are determined according to the curves V Rn -V Gn and V Bn -V Gn , and the corresponding Gn', Rn' and Bn', therefore, the ratio of the components of the red, green, and blue colors is the same as or close to the ratio of the component before the adjustment, which improves the problem that the chromaticity shifts after the GAMMA voltage is adjusted.
  • the white balance adjustment method and system of the display device provided by the embodiment of the present invention firstly obtain an initial red pixel white balance component, a green pixel white balance component, and each gray scale according to an initial white balance lookup table.
  • Blue pixel white balance component then fit the relationship curve between the red pixel white balance component and the green pixel white balance component, and fit the relationship curve between the blue pixel white balance component and the green pixel white balance component
  • the GAMMA voltage adjustment is performed, the adjusted green pixel white balance component corresponding to each gray scale is calculated, and the gray scale white balance component is used as a reference, and each gray scale adjustment is respectively obtained according to the relationship curve 1 and the relationship curve 2
  • the latter red pixel white balance component and the blue pixel white balance component establish a second white balance lookup table.
  • the component ratios of the three colors of red, green, and blue are consistent or nearly the same as the component ratio before the adjustment, and the problem that the display chromaticity shifts after adjusting the GAMMA voltage is improved. Further, by means of data fitting, the amount of data calculation is reduced, and the efficiency of white balance adjustment is provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (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)
  • Processing Of Color Television Signals (AREA)

Abstract

一种显示装置的白平衡调整方法及***，该方法包括：根据初始白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量；拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二；在进行GAMMA电压调整后，计算出各个灰阶对应的调整后的绿色像素白平衡分量；将所述调整后的绿色像素白平衡分量代入所述关系曲线一和所述关系曲线二，分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量；按照所述调整后的红色像素白平衡分量、绿色像素白平衡分量以及蓝色像素白平衡分量，建立第二白平衡查找表。

Description

显示装置的白平衡调整方法及其*** 技术领域
本发明涉及显示器技术领域,尤其涉及一种显示装置的白平衡调整方法及其***。
背景技术
液晶显示器，或称LCD(Liquid Crystal Display)，为平面超薄的显示设备，它由一定数量的彩色或黑白像素组成，放置于光源或者反射板前方。液晶显示器功耗很低，并且具有高画质、体积小、重量轻的特点，因此倍受大家青睐，成为显示器的主流。
GAMMA参考电压产生电路作为液晶显示器的一个重要组成部分，对液晶显示器的灰度调节起着至关重要的作用。GAMMA参考电压产生电路的作用是根据所要求的伽玛曲线，来设定GAMMA参考电压，作为液晶显示器进行灰度显示的参考电压。将各GAMMA参考电压输入到液晶显示器的信号驱动电路中，经过信号驱动电路的数模转换器，产生所有灰度电压，使得液晶显示器的灰度和透过率曲线符合要求的伽玛曲线。如图1所示是常见的7对绑点GAMMA电压生成模块设计结构示意图，图中示出了3对绑点，其中，绑点GMA1和GMA14、GMA2和GMA13及GMA8和GMA9分别各为一对。通过控制7对绑点的电压，由内部已经固定的电阻串结构给每一个灰阶进行分压，并经数模转换器1和输出缓存器2后输出。每一对绑点包括+/-两种极性的GAMMA电压，这两种GAMMA电压(V0～V255、V0’～V255’)相对于公共电压(Vcom)对称。
由于大规模生产中的制程波动，会导致部分灰阶的亮度偏离规格值较多，需要通过调整GAMMA电压生成模块中的绑点电压，形成新的灰阶电压以符合亮度要求。但是该方法主要存在如下的问题：调节电压后没有考虑白平衡的问题，即仅针对亮度调整GAMMA电压，却未考虑R(红)、G(绿)、B(蓝)三种颜色的灰阶各自分压的比例关系，从而导致该显示色度发生漂移。具体地，参阅图2至图4，图2示出了一个初始白平衡查找表(Look-Up–Table，LUT)对应的曲线图，横坐标表示对应输入信号的灰阶n，纵坐标表示相应的红、绿、蓝 三种颜色输出的实际灰阶Rn、Gn、Bn。图3是将如图2中的红、绿、蓝三种颜色的实际灰阶转换为对应灰阶电压后的曲线图，图3中，横坐标表示对应输入信号的灰阶n，纵坐标表示相应的红、绿、蓝三种颜色输出的灰阶电压VRn、VGn、VBn。如4示出了当GAMMA绑点电压发生变化时灰阶电压VRn、VGn、VBn的变化情况；图中以绑点电压Va和Vb分别增加为例，则介于Va和Vb之间的灰阶电压VRn、VGn、VBn分别相应增大为VRn1、VGn1、VBn1。然而，红、绿、蓝三种颜色的灰阶电压的变化率并不相同，即，在调整GAMMA电压后，VRn1:VGn1:VBn1≠VRn:VGn:VBn，因此，在调整GAMMA电压后，若不重新调整白平衡，则会导致显示色度发生漂移。
发明内容
有鉴于此，本发明提供了一种显示装置的白平衡调整方法及其***，用于改善调整GAMMA电压后显示色度发生漂移的问题。
为了实现上述目的，本发明采用了如下的技术方案：
一种显示装置的白平衡调整方法，其包括：
根据初始白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量；
拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二；
在进行GAMMA电压调整后，计算出各个灰阶对应的调整后的绿色像素白平衡分量；
将所述调整后的绿色像素白平衡分量代入所述关系曲线一和所述关系曲线二，分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量；
按照所述调整后的红色像素白平衡分量、绿色像素白平衡分量以及蓝色像素白平衡分量，建立第二白平衡查找表。
在一个优选的技术方案中，所述包括步骤：
S101、根据初始白平衡查找表，获取输入灰阶n与红色像素输出灰阶Rn、绿色像素输出灰阶Gn以及蓝色像素输出灰阶Bn之间的关系曲线n-Rn、n-Gn以及n-Bn；
S102、将关系曲线n-Gn转换为输入灰阶n与绿色像素输出灰阶电压VGn关系曲线n-VGn；
S103、根据关系曲线n-Rn和n-Gn，拟合出红色像素输出灰阶Rn和绿色像素输出灰阶Gn之间的关系曲线Rn-Gn；根据关系曲线n-Bn和n-Gn，拟合出蓝色像素输出灰阶Bn和绿色像素输出灰阶Gn之间的关系曲线Bn-Gn；
S104、在进行GAMMA电压调整后，计算出输入灰阶n对应的绿色像素输出的显示灰阶电压VGn’，从关系曲线n-VGn中获取VGn’对应的灰阶Gn’；
S105、根据关系曲线Rn-Gn和关系曲线Bn-Gn获取灰阶Gn’对应的灰阶Rn’和Bn’；
S106、建立第二白平衡查找表，在输入灰阶n时，以Rn’为红色像素输出的显示灰阶，Gn’为绿色像素输出的显示灰阶，Bn’为蓝色像素输出的显示灰阶；
其中，灰阶n为对应于所述显示装置中的任意灰阶。
其中，采用多项式拟合方式获取所述关系曲线Rn-Gn和关系曲线Bn-Gn。
其中，采用三次多项式拟合方式或四次多项式拟合方式获取所述关系曲线Rn-Gn和关系曲线Bn-Gn。
在另一个优选的技术方案中，所述方法包括步骤：
S201、根据初始白平衡查找表，获取输入灰阶n与红色像素输出灰阶Rn、绿色像素输出灰阶Gn以及蓝色像素输出灰阶Bn之间的关系曲线n-Rn、n-Gn以及n-Bn；
S202、将关系曲线n-Rn转换为输入灰阶n与红色像素输出灰阶电压VRn关系曲线n-VRn；将关系曲线n-Gn转换为输入灰阶n与绿色像素输出灰阶电压VGn关系曲线n-VGn；将关系曲线n-Bn转换为输入灰阶n与蓝色像素输出灰阶电压VBn关系曲线n-VBn；
S203、根据关系曲线n-VRn和n-VGn，拟合出红色像素输出电压VRn和绿色像素输出灰阶电压VGn之间的关系曲线VRn-VGn；根据关系曲线n-VBn和n-VGn，拟合出蓝色像素输出灰阶电压VBn和绿色像素输出灰阶电压VGn之间的关系曲线VBn-VGn；
S204、在进行GAMMA电压调整后，计算出输入灰阶n对应的绿色像素输 出的显示灰阶电压VGn’，根据关系曲线VRn-VGn和关系曲线VBn-VGn获取灰阶电压VGn’对应的灰阶电压VRn’和VBn’；
S205、从关系曲线n-VRn中获取VRn’对应的灰阶Rn’，从关系曲线n-VGn中获取VGn’对应的灰阶Gn’，从关系曲线n-VBn中获取VBn’对应的灰阶Bn’；
S206、建立第二白平衡查找表，在输入灰阶n时，以Rn’为红色像素输出的显示灰阶，Gn’为绿色像素输出的显示灰阶，Bn’为蓝色像素输出的显示灰阶；
其中，灰阶n为对应于所述显示装置中的任意灰阶。
其中，采用多项式拟合方式获取所述关系曲线VRn-VGn和关系曲线VBn-VGn。
其中，采用三次多项式拟合方式或四次多项式拟合方式获取所述关系曲线VRn-VGn和关系曲线VBn-VGn。
其中，灰阶n为0～255。
本发明还提供了一种白平衡调整***，其采用如上所述的白平衡调整方法调整显示装置的白平衡，其中，所述白平衡调整***包括：
白平衡关系建立模块，预存有初始白平衡查找表；所述白平衡关系建立模块还根据调整后的红色像素白平衡分量、绿色像素白平衡分量以及蓝色像素白平衡分量建立第二白平衡查找表；
白平衡分量获取模块，根据所述白平衡关系建立模块中存储的白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量；
数据曲线拟合模块，根据所述初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量，拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二；
白平衡分量调整模块，根据调整的GAMMA电压计算出各个灰阶对应的调整后的绿色像素白平衡分量，将所述调整后的绿色像素白平衡分量代入所述关系曲线一和所述关系曲线二，分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量。
相比于现有技术，本发明实施例提供的显示装置的白平衡调整方法及其系 统，首先根据初始的白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量；然后拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二；在进行GAMMA电压调整后，计算出各个灰阶对应的调整后的绿色像素白平衡分量，并且以绿色像素白平衡分量为基准，根据关系曲线一和所述关系曲线二分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量，建立第二白平衡查找表。由此，进行GAMMA电压调整后，红、绿、蓝三种颜色的分量比例与调整之前的分量比例是一致或者接近一致的，改善了调整GAMMA电压后显示色度发生漂移的问题。进一步地，采用数据拟合的手段，减少了数据计算量，提供白平衡调整的效率。
附图说明
图1是常见的GAMMA电压生成模块的结构示意图；
图2示出了初始白平衡查找表对应的曲线图；
图3是将如图2中的红、绿、蓝三种颜色的实际灰阶转换为对应灰阶电压后的曲线图；
图4是如图3中当GAMMA绑点电压发生变化时灰阶电压的变化情况；
图5是本发明实施例提供的显示装置的白平衡调整方法的步骤流程图；
图6是本发明实施例提供的显示装置的白平衡调整***的结构框图；
图7是本发明实施例1中拟合获取的关系曲线Rn-Gn和关系曲线Bn-Gn。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面结合附图对本发明的具体实施方式进行详细说明。这些优选实施方式的示例在附图中进行了例示。附图中所示和根据附图描述的本发明的实施方式仅仅是示例性的，并且本发明并不限于这些实施方式。
在此，还需要说明的是，为了避免因不必要的细节而模糊了本发明，在附图中仅仅示出了与根据本发明的方案密切相关的结构和/或处理步骤，而省略了与本发明关系不大的其他细节。
如前所述，本发明的目的是为了改善调整GAMMA电压后显示色度发生漂 移的问题，提供了一种显示装置的白平衡调整方法及其***。
如图5所示，本发明实施例提供的显示装置的白平衡调整方法包括步骤：
一、根据初始白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量。
二、拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二。
三、在进行GAMMA电压调整后，计算出各个灰阶对应的调整后的绿色像素白平衡分量。
四、将所述调整后的绿色像素白平衡分量代入所述关系曲线一和所述关系曲线二，分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量。
五、按照所述调整后的红色像素白平衡分量、绿色像素白平衡分量以及蓝色像素白平衡分量，建立第二白平衡查找表。
经过如上白平衡调整方法调整白平衡后的显示装置，按照获得的第二白平衡查找表驱动该显示装置显示图像。
如图6所示，本发明实施例提供的显示装置的白平衡调整***包括白平衡关系建立模块10、白平衡分量获取模块20、数据曲线拟合模块和白平衡分量调整模块40。
其中，所述白平衡关系建立模块10中预存有初始白平衡查找表；所述白平衡关系建立模块10还根据由调整后的白平衡分量调整模块40红色像素白平衡分量、绿色像素白平衡分量以及蓝色像素白平衡分量建立第二白平衡查找表。
其中，所述白平衡分量获取模块20根据所述白平衡关系建立模块10中存储的白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量。
其中，所述数据曲线拟合模块30根据所述初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量，拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二。
其中，白平衡分量调整模块40根据调整的GAMMA电压计算出各个灰阶对应的调整后的绿色像素白平衡分量，将所述调整后的绿色像素白平衡分量代入所述关系曲线一和所述关系曲线二，分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量。
实施例1
本实施例提供的显示装置的白平衡调整方法包括步骤：
S101、根据初始白平衡查找表，获取输入灰阶n与红色像素输出灰阶Rn、绿色像素输出灰阶Gn以及蓝色像素输出灰阶Bn之间的关系曲线n-Rn、n-Gn以及n-Bn。如图2中关系曲线n-Rn、n-Gn以及n-Bn。其中，初始白平衡查找表预存于白平衡关系建立模块10中，关系曲线n-Rn、n-Gn以及n-Bn由白平衡分量获取模块20根据初始白平衡查找表获取。
S102、将关系曲线n-Gn转换为输入灰阶n与绿色像素输出灰阶电压VGn关系曲线n-VGn。其中，关系曲线n-VGn参见图3中的曲线n-VGn，关系曲线n-VGn由白平衡分量获取模块20将关系曲线n-Gn转换获得。
S103、根据关系曲线n-Rn和n-Gn，拟合出红色像素输出灰阶Rn和绿色像素输出灰阶Gn之间的关系曲线Rn-Gn；根据关系曲线n-Bn和n-Gn，拟合出蓝色像素输出灰阶Bn和绿色像素输出灰阶Gn之间的关系曲线Bn-Gn。其中，由数据曲线拟合模块30根据关系曲线n-Rn和n-Gn拟合出关系曲线Rn-Gn，根据关系曲线n-Bn和n-Gn拟合出关系曲线Bn-Gn。
其中，采用多项式拟合方式获取所述关系曲线Rn-Gn和关系曲线Bn-Gn，例如三次多项式拟合方式或四次多项式拟合方式。具体到本实施例中，采用四次多项式拟合方式，得到如下的方程式：
f(x)＝P1x4+P2x3+P3x2+P4x+P5------------------------------------------------(1)；
式(1)中，对于关系曲线Rn-Gn，即x＝Gn，f(x)＝Rn，此时，P1＝-6.206e-010、P2＝8.967e-007、P3＝-0.0005231、P4＝1.259、P5＝-2.034；对于关系曲线Bn-Gn，即x＝Gn，f(x)＝Bn，此时，P1＝8.074e-010、P2＝-1.329e-006、P3＝0.0007107、P4＝0.7404、P5＝3.175。本实施例中拟合得到的关系曲线Rn-Gn和关系曲线Bn-Gn如图7所示。
S104、在进行GAMMA电压调整后，计算出输入灰阶n对应的绿色像素输 出的显示灰阶电压VGn’，从关系曲线n-VGn中获取VGn’对应的灰阶Gn’。具体地，由白平衡分量调整模块40计算出显示灰阶电压VGn’并获取对应的灰阶Gn’。显示灰阶电压VGn’的计算按照如下方式获得：
参阅图4，若电压绑点Va对应的灰阶为na，电压绑点Vb对应的灰阶为nb，若电压电压绑点Va和Vb分别调整为Va’和Vb’，则两电压绑点之间的绿色灰阶Gn对应的灰阶电压VGn变化为VGn’，
Figure PCTCN2016093188-appb-000001
S105、根据关系曲线Rn-Gn和关系曲线Bn-Gn获取灰阶Gn’对应的灰阶Rn’和Bn’。具体地，由白平衡分量调整模块40根据关系曲线Rn-Gn和关系曲线Bn-Gn获取灰阶Gn’对应的灰阶Rn’和Bn’。
S106、建立第二白平衡查找表，在输入灰阶n时，以Rn’为红色像素输出的显示灰阶，Gn’为绿色像素输出的显示灰阶，Bn’为蓝色像素输出的显示灰阶。具体地，由白平衡关系建立模块10根据步骤S104和S105获得的Gn’、Rn’和Bn’建立第二白平衡查找表。
在以上的实施例中，灰阶n为对应于显示装置中的任意灰阶，例如对于256灰阶的显示装置，n的取值为0～255。
按照以上的方式进行白平衡调整，关系曲线Rn-Gn和关系曲线Bn-Gn是根据初始白平衡查找表的参数获得，在进行GAMMA电压调整后，以变化后的绿色灰阶Gn’为基准，再根据曲线Rn-Gn和Bn-Gn确定红色灰阶Rn’和蓝色灰阶Bn’，则红、绿、蓝三种颜色的分量比例与调整之前的分量比例是一致或者接近一致的，改善了调整GAMMA电压后显示色度发生漂移的问题。
其中，根据一般的光学原理，同一灰阶对应的绿色亮度>红色亮度>蓝色亮度，因此选用绿色像素的参数为基准，在降低计算复杂度的同时提高了准确性。
实施例2
本实施例提供的显示装置的白平衡调整方法包括步骤：
S201、根据初始白平衡查找表，获取输入灰阶n与红色像素输出灰阶Rn、绿色像素输出灰阶Gn以及蓝色像素输出灰阶Bn之间的关系曲线n-Rn、n-Gn以及n-Bn。该步骤参照实施例1中的方式进行。
S202、将关系曲线n-Rn转换为输入灰阶n与红色像素输出灰阶电压VRn关 系曲线n-VRn；将关系曲线n-Gn转换为输入灰阶n与绿色像素输出灰阶电压VGn关系曲线n-VGn；将关系曲线n-Bn转换为输入灰阶n与蓝色像素输出灰阶电压VBn关系曲线n-VBn。其中，由白平衡分量获取模块20对关系曲线进行转换，获得如图3所示的曲线n-VRn、n-VGn和n-VBn。
S203、根据关系曲线n-VRn和n-VGn，拟合出红色像素输出电压VRn和绿色像素输出灰阶电压VGn之间的关系曲线VRn-VGn；根据关系曲线n-VBn和n-VGn，拟合出蓝色像素输出灰阶电压VBn和绿色像素输出灰阶电压VGn之间的关系曲线VBn-VGn。其中，由数据曲线拟合模块30根据关系曲线n-VRn和n-VGn拟合出关系曲线VRn-VGn，根据关系曲线n-VBn和n-VGn拟合出关系曲线VBn-VGn。
其中，采用多项式拟合方式获取所述关系曲线VRn-VGn和关系曲线VBn-VGn，例如三次多项式拟合方式或四次多项式拟合方式。
S204、在进行GAMMA电压调整后，计算出输入灰阶n对应的绿色像素输出的显示灰阶电压VGn’，根据关系曲线VRn-VGn和关系曲线VBn-VGn获取灰阶电压VGn’对应的灰阶电压VRn’和VBn’。VGn’的计算实施例1中的方式进行。
S205、从关系曲线n-VRn中获取VRn’对应的灰阶Rn’，从关系曲线n-VGn中获取VGn’对应的灰阶Gn’，从关系曲线n-VBn中获取VBn’对应的灰阶Bn’。由白平衡分量调整模块40根据关系曲线n-VRn、n-VGn和n-VBn中分别获取灰阶Rn’、Gn’和Bn’。
S206、建立第二白平衡查找表，在输入灰阶n时，以Rn’为红色像素输出的显示灰阶，Gn’为绿色像素输出的显示灰阶，Bn’为蓝色像素输出的显示灰阶。具体地，由白平衡关系建立模块10根据步骤S205获得的Gn’、Rn’和Bn’建立第二白平衡查找表。
在以上的实施例中，灰阶n为对应于显示装置中的任意灰阶，例如对于256灰阶的显示装置，n的取值为0～255。
按照以上的方式进行白平衡调整，关系曲线VRn-VGn和关系曲线VBn-VGn是根据初始白平衡查找表的参数获得，在进行GAMMA电压调整后，以变化后的绿色灰阶电压VGn’为基准，再根据曲线VRn-VGn和VBn-VGn确定红色灰阶电压VRn’和蓝色灰阶电压VBn’，再进一步得出对应的Gn’、Rn’和Bn’，因此红、绿、蓝三种颜色的分量比例与调整之前的分量比例是一致或者接近一致的，改善了调整GAMMA电压后显示色度发生漂移的问题。
综上所述，本发明实施例提供的显示装置的白平衡调整方法及其***，首先根据初始的白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量；然后拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二；在进行GAMMA电压调整后，计算出各个灰阶对应的调整后的绿色像素白平衡分量，并且以绿色像素白平衡分量为基准，根据关系曲线一和所述关系曲线二分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量，建立第二白平衡查找表。由此，进行GAMMA电压调整后，红、绿、蓝三种颜色的分量比例与调整之前的分量比例是一致或者接近一致的，改善了调整GAMMA电压后显示色度发生漂移的问题。进一步地，采用数据拟合的手段，减少了数据计算量，提供白平衡调整的效率。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (18)

  1. 一种显示装置的白平衡调整方法，其中，包括：
    根据初始白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量；
    拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二；
    在进行GAMMA电压调整后，计算出各个灰阶对应的调整后的绿色像素白平衡分量；
    将所述调整后的绿色像素白平衡分量代入所述关系曲线一和所述关系曲线二，分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量；
    按照所述调整后的红色像素白平衡分量、绿色像素白平衡分量以及蓝色像素白平衡分量，建立第二白平衡查找表。
  2. 根据权利要求1所述的白平衡调整方法，其中，所述方法包括步骤：
    S101、根据初始白平衡查找表，获取输入灰阶n与红色像素输出灰阶Rn、绿色像素输出灰阶Gn以及蓝色像素输出灰阶Bn之间的关系曲线n-Rn、n-Gn以及n-Bn；
    S102、将关系曲线n-Gn转换为输入灰阶n与绿色像素输出灰阶电压VGn关系曲线n-VGn；
    S103、根据关系曲线n-Rn和n-Gn，拟合出红色像素输出灰阶Rn和绿色像素输出灰阶Gn之间的关系曲线Rn-Gn；根据关系曲线n-Bn和n-Gn，拟合出蓝色像素输出灰阶Bn和绿色像素输出灰阶Gn之间的关系曲线Bn-Gn；
    S104、在进行GAMMA电压调整后，计算出输入灰阶n对应的绿色像素输出的显示灰阶电压VGn’，从关系曲线n-VGn中获取VGn’对应的灰阶Gn’；
    S105、根据关系曲线Rn-Gn和关系曲线Bn-Gn获取灰阶Gn’对应的灰阶Rn’和Bn’；
    S106、建立第二白平衡查找表，在输入灰阶n时，以Rn’为红色像素输出的显示灰阶，Gn’为绿色像素输出的显示灰阶，Bn’为蓝色像素输出的显示灰阶；
    其中，灰阶n为对应于所述显示装置中的任意灰阶。
  3. 根据权利要求2所述的白平衡调整方法，其中，采用多项式拟合方式获取所述关系曲线Rn-Gn和关系曲线Bn-Gn。
  4. 根据权利要求2所述的白平衡调整方法，其中，采用三次多项式拟合方式或四次多项式拟合方式获取所述关系曲线Rn-Gn和关系曲线Bn-Gn。
  5. 根据权利要求2所述的白平衡调整方法，其中，灰阶n为0～255。
  6. 根据权利要求1所述的白平衡调整方法，其中，所述方法包括步骤：
    S201、根据初始白平衡查找表，获取输入灰阶n与红色像素输出灰阶Rn、绿色像素输出灰阶Gn以及蓝色像素输出灰阶Bn之间的关系曲线n-Rn、n-Gn以及n-Bn；
    S202、将关系曲线n-Rn转换为输入灰阶n与红色像素输出灰阶电压VRn关系曲线n-VRn；将关系曲线n-Gn转换为输入灰阶n与绿色像素输出灰阶电压VGn关系曲线n-VGn；将关系曲线n-Bn转换为输入灰阶n与蓝色像素输出灰阶电压VBn关系曲线n-VBn；
    S203、根据关系曲线n-VRn和n-VGn，拟合出红色像素输出电压VRn和绿色像素输出灰阶电压VGn之间的关系曲线VRn-VGn；根据关系曲线n-VBn和n-VGn，拟合出蓝色像素输出灰阶电压VBn和绿色像素输出灰阶电压VGn之间的关系曲线VBn-VGn；
    S204、在进行GAMMA电压调整后，计算出输入灰阶n对应的绿色像素输出的显示灰阶电压VGn’，根据关系曲线VRn-VGn和关系曲线VBn-VGn获取灰阶电压VGn’对应的灰阶电压VRn’和VBn’；
    S205、从关系曲线n-VRn中获取VRn’对应的灰阶Rn’，从关系曲线n-VGn中获取VGn’对应的灰阶Gn’，从关系曲线n-VBn中获取VBn’对应的灰阶Bn’；
    S206、建立第二白平衡查找表，在输入灰阶n时，以Rn’为红色像素输出的显示灰阶，Gn’为绿色像素输出的显示灰阶，Bn’为蓝色像素输出的显示灰阶；
    其中，灰阶n为对应于所述显示装置中的任意灰阶。
  7. 根据权利要求6所述的白平衡调整方法，其中，采用多项式拟合方式获取所述关系曲线VRn-VGn和关系曲线VBn-VGn。
  8. 根据权利要求6所述的白平衡调整方法，其中，采用三次多项式拟合方式或四次多项式拟合方式获取所述关系曲线VRn-VGn和关系曲线VBn-VGn。
  9. 根据权利要求6所述的白平衡调整方法，其中，灰阶n为0～255。
  10. 一种白平衡调整***，用于调整显示装置的白平衡，其中，所述白平衡调整***包括：
    白平衡关系建立模块，预存有初始白平衡查找表；所述白平衡关系建立模块还根据调整后的红色像素白平衡分量、绿色像素白平衡分量以及蓝色像素白平衡分量建立第二白平衡查找表；
    白平衡分量获取模块，根据所述白平衡关系建立模块中存储的白平衡查找表，获取各个灰阶的初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量；
    数据曲线拟合模块，根据所述初始的红色像素白平衡分量、绿色像素白平衡分量和蓝色像素白平衡分量，拟合出红色像素白平衡分量与绿色像素白平衡分量之间的关系曲线一，拟合出蓝色像素白平衡分量与绿色像素白平衡分量之间的关系曲线二；
    白平衡分量调整模块，根据调整的GAMMA电压计算出各个灰阶对应的调整后的绿色像素白平衡分量，将所述调整后的绿色像素白平衡分量代入所述关系曲线一和所述关系曲线二，分别获取各个灰阶调整后的红色像素白平衡分量和蓝色像素白平衡分量。
  11. 根据权利要求10所述的白平衡调整***，其中，
    所述白平衡分量获取模块根据初始白平衡查找表，获取输入灰阶n与红色像素输出灰阶Rn、绿色像素输出灰阶Gn以及蓝色像素输出灰阶Bn之间的关系曲线n-Rn、n-Gn以及n-Bn；所述白平衡分量获取模块将关系曲线n-Gn转换为输入灰阶n与绿色像素输出灰阶电压VGn关系曲线n-VGn；
    所述数据曲线拟合模块根据关系曲线n-Rn和n-Gn，拟合出红色像素输出灰阶Rn和绿色像素输出灰阶Gn之间的关系曲线Rn-Gn；所述数据曲线拟合模块根据关系曲线n-Bn和n-Gn，拟合出蓝色像素输出灰阶Bn和绿色像素输出灰阶Gn之间的关系曲线Bn-Gn；
    在进行GAMMA电压调整后，所述白平衡分量调整模块计算出输入灰阶n 对应的绿色像素输出的显示灰阶电压VGn’，从关系曲线n-VGn中获取VGn’对应的灰阶Gn’；所述白平衡分量调整模块还根据关系曲线Rn-Gn和关系曲线Bn-Gn获取灰阶Gn’对应的灰阶Rn’和Bn’；
    所述白平衡关系建立模块根据从所述白平衡分量调整模块获取的灰阶Gn’、Rn’和Bn’建立第二白平衡查找表，在输入灰阶n时，以Rn’为红色像素输出的显示灰阶，Gn’为绿色像素输出的显示灰阶，Bn’为蓝色像素输出的显示灰阶；
    其中，灰阶n为对应于所述显示装置中的任意灰阶。
  12. 根据权利要求11所述的白平衡调整***，其中，所述数据曲线拟合模块中采用多项式拟合方式获取所述关系曲线Rn-Gn和关系曲线Bn-Gn。
  13. 根据权利要求11所述的白平衡调整***，其中，所述数据曲线拟合模块中采用三次多项式拟合方式或四次多项式拟合方式获取所述关系曲线Rn-Gn和关系曲线Bn-Gn。
  14. 根据权利要求11所述的白平衡调整***，其中，灰阶n为0～255。
  15. 根据权利要求10所述的白平衡调整***，其中，
    所述白平衡分量获取模块根据初始白平衡查找表，获取输入灰阶n与红色像素输出灰阶Rn、绿色像素输出灰阶Gn以及蓝色像素输出灰阶Bn之间的关系曲线n-Rn、n-Gn以及n-Bn；所述白平衡分量获取模块将关系曲线n-Rn转换为输入灰阶n与红色像素输出灰阶电压VRn关系曲线n-VRn；将关系曲线n-Gn转换为输入灰阶n与绿色像素输出灰阶电压VGn关系曲线n-VGn；将关系曲线n-Bn转换为输入灰阶n与蓝色像素输出灰阶电压VBn关系曲线n-VBn；
    所述数据曲线拟合模块根据关系曲线n-VRn和n-VGn，拟合出红色像素输出电压VRn和绿色像素输出灰阶电压VGn之间的关系曲线VRn-VGn；所述数据曲线拟合模块根据关系曲线n-VBn和n-VGn，拟合出蓝色像素输出灰阶电压VBn和绿色像素输出灰阶电压VGn之间的关系曲线VBn-VGn；
    在进行GAMMA电压调整后，所述白平衡分量调整模块计算出输入灰阶n对应的绿色像素输出的显示灰阶电压VGn’，并根据关系曲线VRn-VGn和关系曲线VBn-VGn获取灰阶电压VGn’对应的灰阶电压VRn’和VBn’；
    所述白平衡分量调整模块分别从关系曲线n-VRn中获取VRn’对应的灰阶Rn’，从关系曲线n-VGn中获取VGn’对应的灰阶Gn’，从关系曲线n-VBn中获取 VBn’对应的灰阶Bn’；
    所述白平衡关系建立模块根据从所述白平衡分量调整模块获取的灰阶Gn’、Rn’和Bn’建立第二白平衡查找表，在输入灰阶n时，以Rn’为红色像素输出的显示灰阶，Gn’为绿色像素输出的显示灰阶，Bn’为蓝色像素输出的显示灰阶；
    其中，灰阶n为对应于所述显示装置中的任意灰阶。
  16. 根据权利要求15所述的白平衡调整***，其中，所述数据曲线拟合模块中采用多项式拟合方式获取所述关系曲线VRn-VGn和关系曲线VBn-VGn。
  17. 根据权利要求15所述的白平衡调整***，其中，所述数据曲线拟合模块中采用三次多项式拟合方式或四次多项式拟合方式获取所述关系曲线VRn-VGn和关系曲线VBn-VGn。
  18. 根据权利要求15所述的白平衡调整***，其中，灰阶n为0～255。
PCT/CN2016/093188 2016-07-20 2016-08-04 显示装置的白平衡调整方法及其*** WO2018014376A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/128,986 US10339878B2 (en) 2016-07-20 2016-08-04 White balance adjustment methods and systems for display devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610572881.3A CN106023929B (zh) 2016-07-20 2016-07-20 显示装置的白平衡调整方法及其***
CN201610572881.3 2016-07-20

Publications (1)

Publication Number Publication Date
WO2018014376A1 true WO2018014376A1 (zh) 2018-01-25

Family

ID=57116687

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/093188 WO2018014376A1 (zh) 2016-07-20 2016-08-04 显示装置的白平衡调整方法及其***

Country Status (3)

Country Link
US (1) US10339878B2 (zh)
CN (1) CN106023929B (zh)
WO (1) WO2018014376A1 (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107665676B (zh) * 2017-08-16 2018-10-12 惠科股份有限公司 一种显示装置的白平衡调整方法和显示装置
CN107358933B (zh) * 2017-09-15 2019-10-11 深圳市华星光电技术有限公司 液晶显示面板的白平衡方法及装置
CN108711396B (zh) * 2018-05-30 2020-03-31 京东方科技集团股份有限公司 像素数据的处理方法及处理装置、显示装置及显示方法
CN108597447A (zh) * 2018-07-09 2018-09-28 武汉华星光电半导体显示技术有限公司 一种显示面板灰阶电压的调试方法及装置
CN109509457B (zh) * 2019-01-09 2021-01-01 惠州市华星光电技术有限公司 液晶面板的显示模式设定方法及液晶面板
CN110120190B (zh) * 2019-04-10 2021-12-21 深圳康佳电子科技有限公司 一种Micro LED显示面板及其控制方法
CN110400548B (zh) * 2019-07-05 2021-02-02 深圳市华星光电技术有限公司 显示器的白平衡调整***及其调整方法
CN110428777B (zh) * 2019-08-14 2021-01-22 京东方科技集团股份有限公司 一种显示模组的显示校正方法和装置
CN111785225B (zh) * 2020-07-07 2022-04-12 深圳市华星光电半导体显示技术有限公司 白平衡调整方法及其装置
CN114023238B (zh) * 2021-11-16 2023-05-05 Tcl华星光电技术有限公司 显示装置
CN115190283B (zh) * 2022-07-05 2023-09-19 北京地平线信息技术有限公司 一种白平衡调整方法及装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110066483A (ko) * 2009-12-11 2011-06-17 엘지디스플레이 주식회사 스캐너 일체형 액정표시장치 및 그의 스캔 모드 구동방법
CN102237025A (zh) * 2010-04-22 2011-11-09 冠捷投资有限公司 一种用于显示器色彩校正的查找表产生方法
JP2011239060A (ja) * 2010-05-07 2011-11-24 Sanyo Electric Co Ltd 画像データ処理装置
CN104299568A (zh) * 2014-10-23 2015-01-21 京东方科技集团股份有限公司 一种woled显示装置的图像显示控制方法及装置、显示装置
CN105263010A (zh) * 2015-11-26 2016-01-20 深圳市华星光电技术有限公司 一种自动白平衡方法及***

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4431491C1 (de) * 1994-09-03 1996-01-18 Wolf Gmbh Richard Verfahren und Vorrichtung zur Korrektur des Weißabgleichs eines Videofarbbildsignals
JPH1013849A (ja) * 1996-06-20 1998-01-16 Fujitsu General Ltd Ｐｄｐのガンマ補正方式
JP2000316173A (ja) * 1999-05-06 2000-11-14 Matsushita Electric Ind Co Ltd ホワイトバランス調整装置
US6791609B2 (en) * 1999-12-20 2004-09-14 Texas Instruments Incorporated Digital still camera system and method
US7330209B2 (en) * 1999-12-20 2008-02-12 Texas Instruments Incorporated Digital still camera system and complementary-color-filtered array interpolation method
US6829016B2 (en) * 1999-12-20 2004-12-07 Texas Instruments Incorporated Digital still camera system and method
US6873658B2 (en) * 1999-12-20 2005-03-29 Texas Instruments Incorporated Digital still camera system and method
US6754279B2 (en) * 1999-12-20 2004-06-22 Texas Instruments Incorporated Digital still camera system and method
US6933970B2 (en) * 1999-12-20 2005-08-23 Texas Instruments Incorporated Digital still camera system and method
US20020135683A1 (en) * 1999-12-20 2002-09-26 Hideo Tamama Digital still camera system and method
JP3939066B2 (ja) * 2000-03-08 2007-06-27 富士通日立プラズマディスプレイ株式会社 カラープラズマディスプレイ装置
US20030222998A1 (en) * 2000-12-20 2003-12-04 Satoru Yamauchi Digital still camera system and method
US6573932B1 (en) * 2002-03-15 2003-06-03 Eastman Kodak Company Method for automatic white balance of digital images
TW594822B (en) * 2003-01-29 2004-06-21 Chunghwa Picture Tubes Ltd Plasma display panel with gray level white balance device
US7679684B2 (en) * 2004-02-10 2010-03-16 Panasonic Corporation White balance adjusting device and video display device
US7663668B2 (en) * 2004-04-05 2010-02-16 Mitsubishi Electric Corporation Imaging device
JP2007074299A (ja) * 2005-09-06 2007-03-22 Sony Corp 画像処理方法、画像処理プログラムおよび画像処理装置、ならびに、撮像装置、撮像方法および撮像プログラム
JP4872982B2 (ja) * 2008-07-31 2012-02-08 ソニー株式会社 画像処理回路および画像表示装置
CN101350885B (zh) * 2008-09-02 2010-06-30 熊猫电子集团有限公司 平板电视灰度系数曲线及白平衡自动调试的方法
CN101739965B (zh) * 2008-11-07 2013-02-13 奇美电子股份有限公司 液晶面板驱动方法及液晶显示器
US8854294B2 (en) * 2009-03-06 2014-10-07 Apple Inc. Circuitry for independent gamma adjustment points
CN101860764B (zh) * 2009-04-08 2012-07-18 鸿富锦精密工业（深圳）有限公司 白平衡调整方法
CN101860765B (zh) * 2009-04-13 2012-03-14 鸿富锦精密工业（深圳）有限公司 白平衡调整方法
CN102542962B (zh) * 2012-02-07 2013-11-20 深圳市华星光电技术有限公司 白平衡调整方法
US9531961B2 (en) * 2015-05-01 2016-12-27 Duelight Llc Systems and methods for generating a digital image using separate color and intensity data
US9918017B2 (en) * 2012-09-04 2018-03-13 Duelight Llc Image sensor apparatus and method for obtaining multiple exposures with zero interframe time
US9179062B1 (en) * 2014-11-06 2015-11-03 Duelight Llc Systems and methods for performing operations on pixel data
US9154708B1 (en) * 2014-11-06 2015-10-06 Duelight Llc Image sensor apparatus and method for simultaneously capturing flash and ambient illuminated images
US9179085B1 (en) * 2014-11-06 2015-11-03 Duelight Llc Image sensor apparatus and method for obtaining low-noise, high-speed captures of a photographic scene
US9167174B1 (en) * 2014-11-05 2015-10-20 Duelight Llc Systems and methods for high-dynamic range images
US9167169B1 (en) * 2014-11-05 2015-10-20 Duelight Llc Image sensor apparatus and method for simultaneously capturing multiple images
US9137455B1 (en) * 2014-11-05 2015-09-15 Duelight Llc Image sensor apparatus and method for obtaining multiple exposures with zero interframe time
US9160936B1 (en) * 2014-11-07 2015-10-13 Duelight Llc Systems and methods for generating a high-dynamic range (HDR) pixel stream
US20140218411A1 (en) * 2013-02-05 2014-08-07 Shenzhen China Star Optoelectronics Technology Co. Ltd. Method and System for Improving a Color Shift of Viewing Angle of Skin Color of an LCD Screen
US9807322B2 (en) * 2013-03-15 2017-10-31 Duelight Llc Systems and methods for a digital image sensor
US9509919B2 (en) * 2014-11-17 2016-11-29 Duelight Llc System and method for generating a digital image
US10088989B2 (en) * 2014-11-18 2018-10-02 Duelight Llc System and method for computing operations based on a first and second user input
US9218662B1 (en) * 2014-11-06 2015-12-22 Duelight Llc System, method, and computer program product for exchanging images
US9448771B2 (en) * 2014-10-17 2016-09-20 Duelight Llc System, computer program product, and method for generating a lightweight source code for implementing an image processing pipeline
US9508133B2 (en) * 2014-11-18 2016-11-29 Duelight Llc System and method for generating an image result based on availability of a network resource
US9460118B2 (en) * 2014-09-30 2016-10-04 Duelight Llc System, method, and computer program product for exchanging images
US20150229819A1 (en) * 2014-02-12 2015-08-13 William G. Rivard System and method for generating a digital image
US9424628B2 (en) * 2014-06-19 2016-08-23 Microsoft Technology Licensing, Llc Identifying gray regions for auto white balancing
US9998935B2 (en) * 2014-11-18 2018-06-12 Duelight Llc System and method for sharing data based on a combined bandwidth consumption

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110066483A (ko) * 2009-12-11 2011-06-17 엘지디스플레이 주식회사 스캐너 일체형 액정표시장치 및 그의 스캔 모드 구동방법
CN102237025A (zh) * 2010-04-22 2011-11-09 冠捷投资有限公司 一种用于显示器色彩校正的查找表产生方法
JP2011239060A (ja) * 2010-05-07 2011-11-24 Sanyo Electric Co Ltd 画像データ処理装置
CN104299568A (zh) * 2014-10-23 2015-01-21 京东方科技集团股份有限公司 一种woled显示装置的图像显示控制方法及装置、显示装置
CN105263010A (zh) * 2015-11-26 2016-01-20 深圳市华星光电技术有限公司 一种自动白平衡方法及***

Also Published As

Publication number Publication date
CN106023929B (zh) 2018-08-24
US20180240415A1 (en) 2018-08-23
CN106023929A (zh) 2016-10-12
US10339878B2 (en) 2019-07-02

Similar Documents

Publication Publication Date Title
WO2018014376A1 (zh) 显示装置的白平衡调整方法及其***
TWI500018B (zh) 顯示面板之串音補償方法及其顯示裝置
WO2013086745A1 (zh) 色彩调整装置、色彩调整方法以及显示器
US10755620B2 (en) Tone correction data preparation device, tone correction device, electronic apparatus, and tone correction data preparation method
WO2018126749A1 (zh) 组合像素的灰阶补偿装置、方法以及显示装置
TWI463464B (zh) 紅綠藍白光顯示系統之背光調整裝置及其方法
WO2013086740A1 (zh) 色彩调整装置、色彩调整方法以及显示器
TW201640482A (zh) 具有影像補償功能之影像處理裝置及其影像處理方法
US20160093238A1 (en) Image color enhancement method and device for display
WO2019119587A1 (zh) 显示装置的驱动方法及显示装置
WO2019119586A1 (zh) 显示装置的驱动方法及显示装置
WO2015100769A1 (zh) 白平衡调整方法及***、液晶显示器制造方法
WO2016095294A1 (zh) 一种rgb数据的转换方法及转换***
JP2019008019A (ja) 信号処理装置及びそれを備える表示装置
TW201807693A (zh) 像素驅動方法
US20130063474A1 (en) Multi-primary color lcd and color signal conversion device and method thereof
TW201608554A (zh) 顯示裝置及其色彩轉換方法
KR101295881B1 (ko) 선호색 보정방법과 이를 이용한 표시장치
TWI446332B (zh) 伽瑪校正方法
US20130155120A1 (en) Color Adjustment Device, Method for Adjusting Color, and Display for the Same
WO2020118924A1 (zh) 显示模组的驱动方法、驱动***和驱动装置
TWI640800B (zh) 調整顯示器之輸出影像之方法及顯示系統
TWI460712B (zh) 顯示器之色域補償方法
KR101528146B1 (ko) 영상 표시장치의 구동장치와 그 구동방법
WO2019119585A1 (zh) 显示装置的驱动方法及显示装置

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 15128986

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16909303

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16909303

Country of ref document: EP

Kind code of ref document: A1