WO2015021705A1 - 一种处理显示模组亮度数据方法、系统及显示器件 - Google Patents

一种处理显示模组亮度数据方法、系统及显示器件 Download PDF

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Publication number
WO2015021705A1
WO2015021705A1 PCT/CN2013/087612 CN2013087612W WO2015021705A1 WO 2015021705 A1 WO2015021705 A1 WO 2015021705A1 CN 2013087612 W CN2013087612 W CN 2013087612W WO 2015021705 A1 WO2015021705 A1 WO 2015021705A1
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display module
brightness data
module
grayscale
image
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PCT/CN2013/087612
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English (en)
French (fr)
Inventor
陈丽莉
刘淼
朱墨雨
王光泉
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京东方科技集团股份有限公司
京东方现代(北京)显示技术有限公司
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Publication of WO2015021705A1 publication Critical patent/WO2015021705A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0271Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276Adjustment 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

Definitions

  • the present invention relates to the field of display technology, in particular;
  • the brightness data of the display module needs to be obtained first.
  • a method and system for detecting gamma curve of an LCD screen discloses a method and a detection method for a composite gamma curve. It compares the source image with the gray image and generates a composite gamma curve. The image only uses a grayscale image that needs to be measured in a picture. Because the liquid crystal module has a deviation in the test quantity at each position in a grayscale picture, the obtained brightness data is inaccurate, and the generated curve cannot accurately reflect the liquid crystal mode. The characteristics of the group.
  • Method and device for correcting gamma value of LCD screen discloses a test method for gamma value of three backlight modules of red, green and blue, since general liquid crystal modules are all white backlight modules, if three types are passed Color backlight module testing is more cumbersome and not practical.
  • the present invention provides a method, system and display device for processing brightness data of a display module, accurately reflecting characteristics of the liquid crystal module, and improving work efficiency.
  • a method for processing brightness data of a display module comprising: obtaining the brightness data of the display module:
  • the display module to be tested displays a plurality of grayscale images according to a preset rule
  • the preset rule is that the display module to be tested displays only one grayscale image at a time, and is in the previous After the brightness data of the grayscale image is collected, it automatically switches to the next grayscale image until all the grayscale images are displayed.
  • step of processing the display module brightness data Correcting a display module gamma curve according to the brightness data corresponding to the plurality of grayscale images;
  • the step of correcting the display module gamma curve according to the brightness data corresponding to the plurality of grayscale images comprises:
  • a coordinate system is established according to the grayscale value corresponding to each of the grayscale images and the corresponding gamma value, and a gamma curve is drawn.
  • calculating corresponding gamma values according to brightness data corresponding to the current grayscale image includes:
  • the value obtained by dividing the first value by the second value according to the formula is used as the gamma value corresponding to the current grayscale image, wherein the first value is the brightness data corresponding to the current grayscale image and the first time
  • the absolute value of the difference of the obtained luminance data is measured, and the second value is the absolute value of the difference between the luminance data obtained by the last measurement and the luminance data obtained by the first measurement.
  • the preset rule further includes that the gray level of the grayscale image displayed by the display module to be tested is incrementally changed.
  • the preset rule further includes that the gray scale of the grayscale image displayed by the display module to be tested is incrementally changed, and when there is a first grayscale image having a grayscale value and having a partial grayscale image and having When the second grayscale image of the full grayscale picture is displayed, the first grayscale image is preferentially displayed;
  • the second brightness data at the preset point of the module to be displayed of the second image is stored corresponding to the grayscale value of the corresponding grayscale picture, and the preset point is located in the display mode to be tested for displaying the first image.
  • the group displays the area of the grayscale picture;
  • the cross-effect value of the display module to be tested is compared with the cross-effect preset value, and the cross-effect value of the display module is corrected according to the comparison result.
  • the step of obtaining the cross effect value of the display module to be tested according to the first brightness data and the second brightness data includes:
  • the invention also provides a system for processing brightness data of a display module, comprising: an image acquisition module, a control module, a display module driving module,
  • the control module is configured to send a plurality of grayscale images to the display module driving module according to a preset rule, and control the display module driving module to send the grayscale image to the display module to be tested, so that The display module to be tested displays the grayscale image;
  • the image collection module is configured to collect brightness data at a preset point of the display module to be tested of the current grayscale image, and send the brightness data to the control module;
  • the preset rule is that the control module controls the display module driving module to send only one grayscale image to the display module to be tested at a time, so that the display module to be tested displays only one grayscale image at a time. And the control module controls the display module driving module to send the next grayscale image after the brightness data collection of the previous grayscale image is completed, until all the grayscale images are displayed.
  • control module is further configured to: correct the display module gamma curve according to the brightness data corresponding to the plurality of grayscale images;
  • the image acquisition module is an optical test probe.
  • the present invention also provides a display device comprising the system for processing brightness data of a display module as described above.
  • the beneficial effects of the invention are: accurately switching the gray scale image displayed by the display module to be tested, and measuring the brightness data of different gray scale images at the same point of the display module to be tested, and accurately obtaining the brightness data of the display module to be tested.
  • accurately and quickly perform gamma curve correction and/or correction of cross-effect values to improve work efficiency.
  • FIG. 1 is a flow chart showing a method for processing brightness data of a display module according to the present invention
  • FIG. 2 is a system block diagram of processing the brightness data of the display module of the liquid crystal module of the present invention
  • Figure 3 is a schematic view showing the gamma curve of the present invention.
  • Fig. 4 is a flow chart showing the measurement of the luminance data of the display module to be tested which displays a gray scale image according to the present invention.
  • the embodiment provides a method for processing brightness data of a display module, including: acquiring the brightness data of the display module:
  • the display module to be tested displays a plurality of grayscale images according to a preset rule
  • the preset rule is that the display module to be tested displays only one grayscale image at a time, and is in the previous After the brightness data of the grayscale image is collected, it automatically switches to the next grayscale image until all the grayscale images are displayed.
  • the beneficial effects of the invention are: accurately switching the gray scale image displayed by the display module to be tested, and measuring the brightness data of different gray scale images at the same point of the display module to be tested, and accurately obtaining the brightness data of the display module to be tested. , in order to accurately and quickly perform gamma curve correction and
  • the embodiment further includes the step of processing the brightness data of the display module: Correcting a display module gamma curve according to the brightness data corresponding to the plurality of grayscale images;
  • the step of correcting the gamma curve of the display module according to the brightness data corresponding to the plurality of grayscale images comprises:
  • the gamma curve is automatically switched by the gray scale image displayed by the display module to be tested, and the brightness data of different gray scale images at the same point of the display module to be tested is measured, The gamma curve of the display module to be tested is accurately obtained.
  • the gamma value of the red, green, and blue backlight modules is used, and the method for processing the brightness data of the module is only used in this embodiment.
  • the backlight module of one color can be used for testing.
  • the switching of grayscale images and the collection of luminance data are automatic, and no manual operation is required, which solves the cumbersome work of gamma curve acquisition and improves work efficiency.
  • Drawing a gamma curve based on the brightness data includes:
  • a coordinate system is established according to the grayscale value corresponding to each of the grayscale images and the corresponding gamma value, and a gamma curve is drawn.
  • calculating a corresponding gamma value according to the brightness data corresponding to the current grayscale image includes:
  • the value obtained by dividing the first value by the second value according to the formula i is used as the gamma value corresponding to the current grayscale image, wherein the first value is the brightness data corresponding to the current grayscale image and the first
  • the absolute value of the difference of the obtained luminance data is measured once, and the second value is the absolute value of the difference between the luminance data obtained by the last measurement and the luminance data obtained by the first measurement.
  • the luminance data corresponding to the current grayscale image is not the luminance data obtained by the first measurement.
  • the luminance data obtained by the first measurement is 0, and the luminance data obtained by the last measurement is 1,
  • the gamma values obtained according to the above formula are all values between 0 and 1.
  • the preset rule further includes that the grayscale of the grayscale image displayed by the display module to be tested is incrementally changed, and is incrementally changed according to an equal difference.
  • the gray scale change rule of the gray scale image displayed by the display module to be tested is determined according to needs, for example, the difference of the equal difference, or the irregular change manner, and the variation of the equal difference is used in this embodiment. In this way, the obtained gamma curve is smoother and easier to draw the gamma curve.
  • the gray scales of the plurality of gray scale images include all gray scales required.
  • a gray scale of every 8 orders of magnitude from 0 gray scale to 255 gray scale is tested, and a total of 32 gray scales are used. .
  • the voltage value corresponding to the luminance data of the display module displaying each grayscale image is stored in the initialization code, and the gamma curve 2 is drawn, as shown in FIG.
  • the standard gamma curve 1 is known for comparison.
  • the corresponding register data in the initialization code is adjusted (register data, that is, the voltage value of the display module, and the brightness of the display module is adjusted by adjusting the voltage value)
  • register data that is, the voltage value of the display module
  • the brightness of the display module is adjusted by adjusting the voltage value
  • the brightness data of the display module to be tested is at the same point, that is, the preset point.
  • the preset point is the center point of the display module to be tested.
  • the preset rule further includes that the gray scale of the grayscale image displayed by the display module to be tested is incrementally changed, and the first grayscale image has the same grayscale value.
  • the root of the first grayscale image is preferentially displayed according to the plurality of grayscale image image pairs corresponding to the grayscale image.
  • the first bright luminance data data at the pre-preset point of the display module group to be displayed in the image image of the first image is displayed, and the display is displayed.
  • the second second-brightness luminance data data at the pre-preset point of the display mode module group to be displayed in the image image of the second and second images is corresponding to the corresponding gray
  • the grayscale step value of the grayscale step picture surface is correspondingly stored and stored, and the pre-preset set point point is located on the display image of the first image of the first image.
  • the to-be-tested display shows that the mode module displays the area of the grayscale grayscale picture surface;
  • the root is obtained according to the first first brightness data data according to the first bright brightness data, and the second second brightness brightness data is obtained corresponding to each gray level value value pair.
  • the present invention further provides a system for processing brightness data of a display module, including:
  • Control module display module drive module, image acquisition module,
  • the control module is configured to send the grayscale image to the display module driving module according to a preset rule, and control the display module driving module to send the grayscale image to the display module to be tested, so that The display module to be tested displays the grayscale image;
  • the image acquisition module is configured to collect brightness data corresponding to the current gray scale image at a preset point of the display module to be tested, and send the brightness data to the control module;
  • the preset rule is that the control module controls the display module driving module to send only one grayscale image to the display module to be tested at a time, so that the display module to be tested displays only one grayscale image at a time. And after the brightness data collection of the previous grayscale image is completed, the control module controls the display module driving module to send the next grayscale image until all the grayscale images are displayed.
  • the control module is further configured to: correct the display module gamma curve according to the brightness data corresponding to the plurality of grayscale images;
  • the display module and the display module to be tested are only used to distinguish the different states in which the display module performs the corresponding brightness data acquisition and processing, etc.
  • the liquid crystal display device is used.
  • the image acquisition module is an optical test probe.
  • the control module draws a gamma curve according to the brightness data, including:
  • calculating a corresponding gamma value according to the brightness data corresponding to the current grayscale image includes:
  • the control module calculates a first value divided by a second value according to a formula, and uses the obtained value as a gamma value corresponding to the current grayscale image, where the first value is a brightness corresponding to the current grayscale image.
  • the absolute value of the difference between the data and the luminance data obtained by the first measurement, the second value being the absolute value of the difference between the luminance data obtained by the last measurement and the luminance data obtained by the first measurement.
  • the luminance data corresponding to the current grayscale image is not the luminance data obtained by the first measurement.
  • the luminance data obtained by the first measurement is 0, and the luminance data obtained by the last measurement is 1,
  • the gamma values obtained according to the above formula are all values between 0 and 1.
  • the control module controls the gray scale of the grayscale image displayed by the display module driving module to be displayed by the display module to be incrementally changed.
  • the gamma curve obtained is smooth and easy to draw gamma.
  • the gray scale of the gray scale image displayed by the display module to be tested changes in equal increments.
  • the grayscale change manner of the grayscale image displayed by the display module to be tested is not limited to this, and may be a method of decreasing the difference or changing irregularly.
  • the preset point is a center point of the display module to be tested.
  • the brightness data of different gray-scale images at the same point of the liquid crystal module to be measured is collected to improve the accuracy of gamma curve drawing.
  • control module includes:
  • Communication parameter setting module used to complete the setting of the serial port, such as baud rate, transmission mode and switch;
  • the LCD module parameter setting module is used to complete the basic information input of the liquid crystal module, such as resolution, interface mode, transmission mode, speed, and the like.
  • the LCD module code transmission function setting module is used to complete the import and input of the LCD module initialization code, and the code can be changed.
  • the code mentioned is also called an array.
  • the image data download function module is used to complete image preview and image download from the control module to the display module driver module.
  • Optical test probe parameter setting module for calibration and testing of optical test probes Project, channel selection, etc.
  • the soft key operation function module is configured to perform a corresponding operation by a button on the software interface, including sending a command to the display module driving module or the optical test probe, and the display module driving module or the optical test probe receiving the command. After the corresponding action is completed, the above electric, power off, get gamma curve and so on.
  • the control module sends a grayscale image to the display module driving module, and sends a command for the display module to display the grayscale image;
  • the display module driving module completes the universal driving of the display module to be tested, and communicates with the control module through the serial port to complete the receiving of the command, and can return the response information to the control module (send the grayscale image to the display to be tested) a module, such that the display module to be tested displays the grayscale image);
  • the optical test probe receives the command sent from the control module through the USB interface, and performs brightness data collection on the center point of the display module to be tested in the lighting state (displaying the current grayscale image), and returns the brightness data to the control.
  • a module the control module saves the brightness data into an array; under the control of the control module, repeats the above steps to test the next grayscale image until all the required grayscale images are completed, such as testing 32 grays For the order image, the above process is repeated 32 times.
  • the array [the grayscale test value], the array [0], and the array [31] in the above formula respectively represent the luminance data stored in the corresponding array.
  • the control module draws the standard gamma curve 1, such as the standard gamma curve 1, the curvature is 2.5, and the standard gamma curve 1 is drawn.
  • the ordinate is calculated as: (The grayscale value/highest grayscale in the color table corresponding to each grayscale ) of the 2.5th power, where the highest gray level value is generally ⁇ 2 ⁇ 55
  • the drawing of the standard gamma curve 1 is prior art and will not be described here.
  • the acquisition of gamma curve 2 does not require manual switching.
  • the detection system automatically switches, calculates and draws by pressing the button once.
  • the adjustment of gamma curve 2 is performed manually, artificially according to the curve display, adjusting the content of the corresponding register in the initialization code (the voltage value of the liquid crystal module), and performing the above test correction again.
  • the adjustment of gamma curve 2 can also be automatically corrected to save human resources.
  • the correction of the display module crossover effect is performed according to the obtained brightness data of the display module.
  • the first image used for cross-effect correction is a gray-scale image in the middle of the block, or a gray-scale image on both sides of the gray-scale image, or a grayscale image in which the left 1/3 is black or white, and the rest are grayscale images.
  • the image, or the right 1/3 is a black or white square, and the rest are grayscale images of grayscale pictures.
  • the preset point is located in the area where the grayscale picture is displayed in the display module to be tested.
  • control module After the system for processing the brightness data of the display module is powered on, the control module sends a command to the display module driving module to display a test screen of the first grayscale CROSSTALK (a first image);
  • the first brightness data after the acquisition is sent to the control module by the optical test probe, and the control module receives the first brightness data and saves it in an array;
  • the control module controls the display module driving module to display the first full grayscale test screen (the second image having the same grayscale value as the first image);
  • the second brightness data after the acquisition is sent to the control module by the optical test probe, and the control module receives the second brightness data and saves it to another array;
  • the control module repeats the process of 1) ⁇ 6)), such as testing 32 grayscale pictures, repeating the above process 32 times (that is, testing 64 grayscale images).
  • the control module calculates the absolute value of the cross effect value of each point (array [the brightness data value of the first image of the gray level of the point] - the array of the brightness data value of the second image of the gray level of the point]) / Array [The brightness data value of the second image of the grayscale at this point; I, this value is generally a value less than 1, and then compared with the set CROSSTALK (cross effect) preset value (for example, CROSSTALK preset value is 2%) After the control module compares, it is unqualified which grayscale CTOSSTALK. The control module can correct the cross effect of the corresponding grayscale value according to the comparison result.
  • the present invention also provides a display device comprising the system for processing brightness data of a display module as described above.
  • the system for processing the brightness data of the module may be integrated into the display device.
  • the display device may include other components than the display module, such as: a back shell, etc., or may only include a display module. .
  • the display device and the display module in the implementation of the present invention may be a device having a display function such as a liquid crystal display panel, a liquid crystal display, or an OLED.

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Abstract

一种处理显示模组亮度数据的方法、系统和显示器件,其中处理显示模组亮度数据的方法,包括:获取显示模组亮度数据的步骤:待测显示模组按照预设规则显示多个灰阶图像;测量显示当前所述灰阶图像的待测显示模组预设点处的亮度数据;其中,所述预设规则为待测显示模组一次仅显示一个所述灰阶图像,并在上一个所述灰阶图像的亮度数据采集结束后自动切换到下一个灰阶图像、直至所有灰阶图像显示完毕。有益效果是:通过在自动切换待测显示模组显示的灰阶图像,并获取待测显示模组同一点的不同灰阶图像的亮度数据,提高工作效率。

Description

本发明涉及显示技术领域,尤;
系统及显示器件。
现有技术中,对显示模组的 gamma曲线进行校正或者对显示模组的交叉 效应迸行校正, 都需要首先获得显示模组的亮度数据。
一种 LCD屏的 gamma曲线检测方法及系统 (200810218007,5 ) 公开了 一种复合 gamma曲线的生成方法及检测方法。它是通过采集灰阶图像与源图 像进行对比, 生成复合的 gamma曲线。而图像只是使用一幅图中显示需要测 量的灰阶画面, 由于液晶模组在一个灰阶画面中各个位置的测试量存在偏差, 获得的亮度数据不准确, 造成生成的曲线不能准确反映液晶模组的特性。
校正 LCD 屏 gamma值的方法和装置 (201010179880.5 ) 公开了一种通 过红、 绿、 蓝三种背光模组的 gamma值的测试方法, 由于一般液晶模组都是 白色背光模组, 如果通过三种颜色背光模组测试, 较为繁琐, 不具备实用性。
为了解决上述技术问题,本发明提供一种处理显示模组亮度数据的方法、 系统及显示器件, 准确反映液晶模组的特性, 提高工作效率。
为了达到上述目的, 本发明采用的技术方案是: 一种处理显示模组亮 度数据的方法, 包括: 获取显示模组亮度数据的步骤:
待测显示模组按照预设规则显示多个灰阶图像;
测量显示当前所述灰阶图像的待测显示模组预设点处的亮度数据; 其中, 所述预设规则为待测显示模组一次仅显示一个所述灰阶图像, 并 在上一个所述灰阶图像的亮度数据采集结束后自动切换到下一个灰阶图像、 直至所有灰阶图像显示完毕。
迸一步地, 包括所述处理显示模组亮度数据的步骤: 根据所述多个灰阶图像对应的所述亮度数据对显示模组 gamma曲线进行 校正;
和 /或
根据所述多个灰阶图像对应的所述亮度数据对显示模组的交叉效应进行 父止。
进一步地, 所述根据所述多个灰阶图像对应的所述亮度数据对显示模组 gamma曲线进行校正的步骤包括:
根据所述多个灰阶图像对应的所述亮度数据绘制 gamma曲线;
将 gamma曲线与标准 gamma曲线进行比对, 根据比对结果对 gamma曲 迸一步地,根据所述多个灰阶图像对应的所述亮度数据绘制 gamma曲线 包括:
根据当前所述灰阶图像对应的亮度数据计算对应的 gamma值;
根据每一个所述灰阶图像对应的灰阶值及对应的 gamma值建立坐标系, 绘制 gamma曲线。
进一步地, 根据当前所述灰阶图像对应的亮度数据 算相对应的 gamma 值包括:
将根据公式计算第一数值除以第二数值所获得的值作为当前所述灰阶图 像对应的 gamma值, 其中, 所述第一数值为当前所述灰阶图像对应的亮度数 据与第一次测量获得的亮度数据的差的绝对值, 所述第二数值为最后一次測 量获得的亮度数据与第一次测量获得的亮度数据的差的绝对值。
进一步地, 所述预设规则还包括待測显示模组显示的所述灰阶图像的灰 阶呈递增变化。
进一步地, 所述预设规则还包括待測显示模组显示的所述灰阶图像的灰 阶呈递增变化, 且当存在灰阶值相同的具有部分灰阶画面的第一灰阶图像和 具有全灰阶画面的第二灰阶图像时, 优先显示所述第一灰阶图像;
所述根据所述多个灰阶图像对应的所述亮度数据对显示模组的交叉效应 进行校正的步骤包括:
将显示所述第一图像的待显示模组的预设点处的第一亮度数据、 显示所 述第二图像的待显示模组的预设点处的第二亮度数据与相应的灰阶画面的灰 阶值相对应存储, 所述预设点位于显示所述第一图像的待测显示模组显示灰 阶画面的区域;
根据所述第一亮度数据、 所述第二亮度数据获得与每一个灰阶值对应的 待測显示模组的交叉效应值;
将待测显示模组的交叉效应值与交叉效应预设值迸行比对, 并根据所述 比对结果对显示模组的交叉效应值迸行校正。
进一步地, 所述根据所述第一亮度数据、 所述第二亮度数据获得待测显 示模组的交叉效应值的步骤包括:
按照公式计算所述第一亮度数据与所述第二亮度数据的差的绝对值与所 述第二亮度数据的比值, 来作为与每一个灰阶值对应的待测显示模组的交叉 效应值。
本发明还提供一种处理显示模组亮度数据的系统, 包括: 图像采集模块、 控制模块、 显示模组驱动模块,
所述控制模块用于按照预设规则将多个灰阶图像发送至所述显示模组驱 动模块,并控制所述显示模组驱动模块将所述灰阶图像发送至待测显示模组, 使得待测显示模组显示所述灰阶图像;
所述图像釆集模块用于釆集显示当前所述灰阶图像的待測显示模组的预 设点处的亮度数据, 将所述亮度数据发送至所述控制模块;
其中, 所述预设规则为所述控制模块控制所述的显示模组驱动模块一次 仅发送一个灰阶图像至待测显示模组, 使得待测显示模组一次仅显示一个所 述灰阶图像, 且所述控制模块在上一个所述灰阶图像的亮度数据采集结束后 控制显示模组驱动模块发送下一个灰阶图像, 直至所有灰阶图像显示完毕。
进一步地, 所述控制模块还用于根据所述多个灰阶图像对应的所述亮度 数据对显示模组 gamma曲线进行校正;
和 /或
根据所述多个灰阶图像对应的所述亮度数据对显示模组的交叉效应进行 校正。
迸一步地, 所述图像采集模块为光学測试探头。 本发明还提供一种显示器件, 其包括上述任一所述的处理显示模组亮度 数据的系统。
本发明的有益效果是: 通过自动切换待测显示模组显示的灰阶图 像, 并测量待测显示模组同一点的不同灰阶图像的亮度数据, 准确的获 得待测显示模组的亮度数据, 以便准确、快速的进行 gamma曲线校正和 /或交叉效应值的校正, 提高工作效率。
图 1表示本发明处理显示模组亮度数据的方法流程图;
图 2表示本发明液晶模组处理显示模组亮度数据的系统框图;
图 3表示本发明 gamma曲线示意图;
图 4表示本发明测量显示一个灰阶图像的待测显示模组的亮度数据采集 的流程图。
以下结合附图对本发明的结构和原理迸行详细说明, 所举实施例仅用于 解释本发明, 并非以此限定本发明的保护范围。
如图 1所示, 本实施例提供一种处理显示模组亮度数据的方法, 包括: 获取显示模组亮度数据的步骤:
待测显示模组按照预设规则显示多个灰阶图像;
测量显示当前所述灰阶图像的待测显示模组预设点处的亮度数据; 其中, 所述预设规则为待测显示模组一次仅显示一个所述灰阶图像, 并 在上一个所述灰阶图像的亮度数据采集结束后自动切换到下一个灰阶图像, 直至所有灰阶图像显示完毕。
本发明的有益效果是: 通过自动切换待测显示模组显示的灰阶图 像, 并测量待测显示模组同一点的不同灰阶图像的亮度数据, 准确的获 得待测显示模组的亮度数据, 以便准确、快速的进行 gamma曲线校正和
/或交叉效应值的校正, 提高工作效率。
本实施例中还包括所述处理显示模组亮度数据的步骤: 根据所述多个灰阶图像对应的所述亮度数据对显示模组 gamma曲线进行 校正;
和 /或
根据所述多个灰阶图像对应的所述亮度数据对显示模组的交叉效应进行 父止。
在本发明一实施例中, 所述根据所述多个灰阶图像对应的所述亮度数据 对显示模组 gamma曲线进行校正的步骤包括:
根据所述多个灰阶图像对应的所述亮度数据绘制 gamma曲线;
将 gamma曲线与标准 gamma曲线进行比对, 根据比对结果对 gamma曲 通过自动切换待測显示模组显示的灰阶图像, 并测量待测显示模组 同一点的不同灰阶图像的亮度数据, 准确的获得待测显示模组的 gamma 曲线, 相对于现有技术中, 采用红、 绿、 蓝三种背光模组的 gamma值的测 试方法, 本实施例处理显示模组亮度数据的方法, 只采用一种颜色的背光模 组进行测试即可, i灰阶图像的切换、 亮度数据的采集, 均是自动的, 不需 要人工的操作, 解决了 gamma曲线获取工作的繁琐, 提高工作效率。
根据所述亮度数据绘制 gamma曲线包括:
根据当前所述灰阶图像对应的亮度数据计算对应的 gamma值;
根据每一个所述灰阶图像对应的灰阶值及对应的 gamma值建立坐标系, 绘制 gamma曲线。
本实施例中, 根据当前所述灰阶图像对应的亮度数据计算相对应的 gamma值包括:
将根据公式 i十算第一数值除以第二数值所获得的值作为当前所述灰阶图 像对应的 gamma值, 其中, 所述第一数值为当前所述灰阶图像对应的亮度数 据与第一次测量获得的亮度数据的差的绝对值, 所述第二数值为最后一次测 量获得的亮度数据与第一次测量获得的亮度数据的差的绝对值。
需要说明的是, 当前所述灰阶图像对应的亮度数据不是第一次测量获得 的亮度数据, 一般情况下, 第一次测量获得的亮度数据为 0, 最后一次测量 获得的亮度数据为 1,依照上述公式获得的 gamma值均为 0到 1之间的数值。 本实施例中, 所述预设规则还包括待测显示模组显示的所述灰阶图 像的灰阶呈递增变化, 且是按照等差递增变化。 在实际测量中, 待测显 示模组显示的所述灰阶图像的灰阶变化规则根据需要而定, 例如: 等差 递减, 或无规则的变化方式, 本实施例中采用等差递增的变化方式, 获 得的 gamma曲线比较平滑, 便于 gamma曲线的绘制。
所述多个灰阶图像的灰阶包括所需要的全部灰阶, 本实施例中, 測 试从 0灰阶到 255灰阶之间每隔 8个数量级的一个灰阶, 共 32个灰阶。
获得所有灰阶图像的亮度数据后, 将与显示每一个灰阶图像的显示 模组的亮度数据对应的电压值存储在初始化代码中,并绘制 gamma曲线 2, 如图 3所示, 再与已知的标准 gamma曲线 1进行对比, 不一致的地 方再对初始化代码中相对应的寄存器数据迸行调整 (寄存器数据, 即显 示模组的电压值, 通过调整该电压值来调整显示模组的亮度) , 从而获 得较好的 gamma 曲线 (可以理解的是, 实际情况中经过校正的 gamma 曲线 2只能趋近于已知的标准 gamma曲线 1 ) 。
为了绘制 gamma曲线, 获得待测显示模组的亮度数据均在同一点, 即预设点, 本实施例中, 预设点为待测显示模组的中心点。
本发明另一实施例中, 所述预设规则还包括待测显示模组显示的所述 灰阶图像的灰阶呈递增变化, 且当存在灰阶值相同的具有部分灰阶画面的第 一灰阶图像和具有全灰阶画面的第二灰阶图像时, 优先显示所述第一灰阶图 所所述述根根据据所所述述多多个个灰灰阶阶图图像像对对应应的的所所述述亮亮度度数数据据对对显显示示模模组组的的交交叉叉效效应应 进进行行校校正正的的步步骤骤包包括括::
将将显显示示所所述述第第一一图图像像的的待待显显示示模模组组的的预预设设点点处处的的第第一一亮亮度度数数据据、、 显显示示所所 述述第第二二图图像像的的待待显显示示模模组组的的预预设设点点处处的的第第二二亮亮度度数数据据与与相相应应的的灰灰阶阶画画面面的的灰灰 阶阶值值相相对对应应存存储储,, 所所述述预预设设点点位位于于显显示示所所述述第第一一图图像像的的待待测测显显示示模模组组显显示示灰灰 阶阶画画面面的的区区域域;;
根根据据所所述述第第一一亮亮度度数数据据、、 所所述述第第二二亮亮度度数数据据获获得得与与每每一一个个灰灰阶阶值值对对应应的的
Figure imgf000008_0001
将将待待測測显显示示模模组组的的交交叉叉效效应应值值与与交交叉叉效效应应预预设设值值进进行行比比对对,, 并并根根据据所所述述 比对结果对显示模组的交叉效应值迸行校正。
所述根据所述第一亮度数据、 所述第二亮度数据获得待測显示模组的交 叉效应值的步骤包括:
按照公式计算所述第一亮度数据与所述第二亮度数据的差的绝对值与所 述第二亮度数据的比值, 来作为与每一个灰阶值对应的待测显示模组的交叉 效应值。
如图 2所示, 本发明还提供一种处理显示模组亮度数据的系统, 包 括:
控制模块、 显示模组驱动模块、 图像采集模块,
所述控制模块用于按照预设规则将所述灰阶图像发送至所述显示模组驱 动模块,并控制所述显示模组驱动模块将所述灰阶图像发送至待测显示模组, 使得待测显示模组显示所述灰阶图像;
所述图像采集模块用于采集待测显示模组的预设点处与当前所述灰阶图 像对应的亮度数据, 并将所述亮度数据发送至所述控制模块;
其中, 所述预设规则为所述控制模块控制所述的显示模组驱动模块一次 仅发送一个灰阶图像至待測显示模组, 使得待測显示模组一次仅显示一个所 述灰阶图像,且所述控制模块在上一个所述灰阶图像的亮度数据采集结束后, 控制显示模组驱动模块发送下一个灰阶图像, 直至所有灰阶图像显示完毕。
所述控制模块还用于根据所述多个灰阶图像对应的所述亮度数据对显示 模组 gamma曲线进行校正;
和 /或
根据所述多个灰阶图像对应的所述亮度数据对显示模组的交叉效应进行 父止。
可以理解的是, 待测显示模组和显示模组仅是为了区别显示模组在进行 相应的亮度数据的获取和处理等时所处的不同状态而已, 本实施例中, 均以 液晶显示器件作为待测显示模组、 显示模组为例迸行介绍; 其中, 所述图像 采集模块为光学测试探头。
所述控制模块根据所述亮度数据绘制 gamma曲线包括:
根据当前所述灰阶图像对应的亮度数据计算对应的 gamma值; 根据每一个所述灰阶图像对应的灰阶值及对应的 gamma值建立坐标系, 绘制 gamma曲线。
本实施例中, 根据当前所述灰阶图像对应的亮度数据计算相对应的 gamma值包括:
所述控制模块根据公式计算第一数值除以第二数值, 并将获得的值作为 当前所述灰阶图像对应的 gamma值, 其中, 所述第一数值为当前所述灰阶图 像对应的亮度数据与第一次测量获得的亮度数据的差的绝对值, 所述第二数 值为最后一次测量获得的亮度数据与第一次测量获得的亮度数据的差的绝对 值。
需要说明的是, 当前所述灰阶图像对应的亮度数据不是第一次测量获得 的亮度数据, 一般情况下, 第一次测量获得的亮度数据为 0, 最后一次测量 获得的亮度数据为 1,依照上述公式获得的 gamma值均为 0到 1之间的数值。
所述控制模块控制所述显示模组驱动模块发送至待测显示模组显示的所 述灰阶图像的灰阶呈递增变化,本实施例中,为了获得的 gamma曲线较平滑、 且易于绘制 gamma曲线,待测显示模组显示的所述灰阶图像的灰阶呈等差递 增变化。 但是并不限于此, 待测显示模组显示的所述灰阶图像的灰阶变化方 式根据需要而定, 也可以是等差递减, 或者无规则变化的方式。
所述预设点为待测显示模组的中心点。 对待测液晶模组的同一点处的不 同灰阶图像的亮度数据进行釆集, 提高 gamma曲线绘制的准确性。
本实施例中, 所述控制模块包括:
通信参数设置模块, 用于完成串口的设置, 如波特率, 传输方式及 开关等;
液晶模组参数设置模块, 用于完成液晶模组基本信息输入, 如分辨 率、 接口方式、 传输方式、 速度等。
液晶模组代码传送功能设置模块, 用于完成液晶模组初始化代码的 导入及输入, 可进行代码的更改。 所提及的代码, 也可称为数组。
图像数据下载功能模块, 用于完成图像的预览及图像从控制模块下 载到显示模组驱动模块。
光学測试探头参数设置模块, 用于完成光学测试探头的校准、 测试 项目、 通道选择等。
软按键操作功能模块, 用于通过软件界面上的按键, 一键式完成相 对应的操作, 包括给显示模组驱动模块或光学測试探头发送命令, 显示 模组驱动模块或光学测试探头接收命令后完成相应的动作, 如上电, 关 电、 获取 gamma曲线等。
以下具体介绍 gamma曲线的绘制过程,对显示一个灰阶图像的待测显示 模组的预设点的亮度数据的釆集, 如图 4所示。
控制模块发送一个灰阶图像至显示模组驱动模块, 并发送待测显示模组 显示该灰阶图像的命令;
显示模组驱动模块完成对待測显示模组的通用驱动, 并与控制模块通过 串口迸行通信, 完成命令的接收, 并能返回应答信息给控制模块 (将所述灰 阶图像发送至待测显示模组, 使得待测显示模组显示所述灰阶图像);
光学测试探头通过 USB接口接收从控制模块发送的命令对点亮状态下的 (显示当前所述灰阶图像) 待测显示模组的中心点进行亮度数据采集, 并将 所述亮度数据返回给控制模块;控制模块将所述亮度数据保存到一个数组里; 在控制模块的控制下, 再重复上述步骤, 測试下一个灰阶图像, 直至测 试完成所有需要的灰阶图像, 如测试 32个灰阶图像, 就反复上述过程 32次。
控制模块通过公式计算每个点的数值 (gamma 值) = (数组 I:该点 灰阶测试值】 数组 【0】 ) / (数组 【31】 数组 【0】 :) , 此值 算出来 是小于或等于 1 的数值 (即 gamma值大于 0 , 小于或等于 1 ) , 将该数 值作为绘制 gamma曲线 2的纵坐标, 以灰阶值为横坐标建立坐标系, 绘 制 gamma曲线 2, 如图 3所示。
其中, 上述公式中数组【该点灰阶测试值】、 数组【0】、 数组【31】 分别表示对应的数组内存储的亮度数据。
控制模块绘制标准 gamma曲线 1, 如标准 gamma曲线 1 的曲率为 2.5, 绘制标准 gamma 曲线 1 采用的纵坐标的计算公式为: (每个灰阶 对应的颜色表中灰阶值 /最高的灰阶) 的 2.5次方, 此处最高灰阶值一般 ^2· 55
标准 gamma曲线 1 的绘制为现有技术, 此处不再赘述。 gamma曲线 2的获得不需要人工切换, 只要按一次按键, 检测系统 自动进行切换、 计算和绘制。 gamma曲线 2的调整, 是通过手动操作, 人为根据曲线显示, 调整初始化代码中的对应寄存器的内容 (液晶模组 的电压值) , 重新进行上述的测试迸行校正。
当然, gamma曲线 2的调整也可以自动进行校正, 以节省人力资源。 本发明另一实施例中, 根据获取的显示模组的亮度数据迸行显示模组交 叉效应 (CROSSTALK) 的校正。 一般情况下, 交叉效应校正采用的第一图 像为中间为方块黑或白色, 两边为灰阶画面的灰阶图像, 或者是左 1/3 为方 块黑或白、 其余为灰阶画面的灰阶图像, 或者右 1/3 为方块黑或白、 其余为 灰阶画面的灰阶图像。 而对显示当前灰阶图像的待测显示模组的预设点的亮 度数据的测量中, 预设点位于待测显示模组中显示灰阶画面的区域。
以下为交叉效应校正的具体过程:
1 )处理显示模组亮度数据的系统上电后, 控制模块给显示模组驱动模块 发送命令, 要求其显示第一个灰阶的 CROSSTALK的测试画面 (一个第一图 像);
2)控制模块延时几毫秒后, 发出命令给光学测试探头, 光学测试探头迸 行第一亮度数据的采集;
3 )采集后的第一亮度数据由光学测试探头发送给控制模块, 控制模块接 收第一亮度数据后, 保存到一个数组里;
4)控制模块控制显示模组驱动模块, 要求其显示第一个全灰阶的测试画 面 (:与所述第一图像灰阶值相同的第二图像);
5 )控制模块延时几毫秒后, 发出命令给光学测试探头, 光学测试探头迸 行第二亮度数据的采集;
6)采集后的第二亮度数据由光学测试探头发给控制模块, 控制模块接收 第二亮度数据后, 保存到另一个数组里;
7) 控制模块再重复 1 ) 〜6) ) 的过程, 如測试 32个灰阶画面, 就反复上 述过程 32次 (即测试 64个灰阶图像)。
8 ) 控制模块通过计算每个点的交叉效应值 绝对值 (数组【该点灰阶的 第一图像的亮度数据值】 -数组〖该点灰阶的第二图像的亮度数据值】) /数组 [该点灰阶的第二图像的亮度数据值; I, 这个值一般为小于 1的数值, 再与设 定的 CROSSTALK (交叉效应) 预设数值比较 (例如, CROSSTALK预设的 数值为 2%), 控制模块通过 算比较后, 报出哪些灰阶 CTOSSTALK.是不合 格的。 控制模块可根据所述比较结果对相应的灰阶值的交叉效应迸行校正。
本发明还提供一种显示器件, 其包括上述任一所述的处理显示模组亮度 数据的系统。
其中, 所述的处理显示模组亮度数据的系统可以集成于显示器件中; 此 外, 显示器件可以包括除显示模组以外的其他组成要件, 例如: 后壳等; 也 可以是仅包括显示模组。
本发明实施中的显示器件、 显示模组可以是液晶显示面板、 液晶显 示器、 OLED等具有显示功能的器件。
以上所述为本发明较佳实施例, 应当指出, 对于本领域普通技术人员来 说, 在不脱离本发明所述原理的前提下, 还可以作出若干改进和润饰, 这些 改进和润饰也应视为本发明保护范围。

Claims

1. 一种处理显示模组亮度数据的方法, 其特征在于, 包括: 获取显示模 组亮度数据的步骤:
待测显示模组按照预设规则显示多个灰阶图像;
测量显示当前所述灰阶图像的待测显示模组预设点处的亮度数据; 其中, 所述预设规则为待测显示模组一次仅显示一个所述灰阶图像, 并 在上一个所述灰阶图像的亮度数据釆集结束后自动切换到下一个灰阶图像, 直至所有灰阶图像显示完毕。
2. 根据权利要求 1所述的处理显示模组亮度数据的方法, 其特征在于, 包括: 处理显示模组亮度数据的步骤:
根据所述多个灰阶图像对应的所述亮度数据对显示模组 gamma曲线进行 父止;
和 /或
根据所述多个灰阶图像对应的所述亮度数据对显示模组的交叉效应进行 校正。
3. 根据权利要求 2所述的处理显示模组亮度数据的方法, 其特征在于, 所述根据所述多个灰阶图像对应的所述亮度数据对显示模组 gamma曲线进行 校正的步骤包括:
根据所述多个灰阶图像对应的所述亮度数据绘制 gamma曲线;
将 gamma曲线与标准 gamma曲线进行比对, 根据比对结果对 gamma曲
4. 根据权利要求 3所述的处理显示模组亮度数据的方法, 其特征在于, 根据所述多个灰阶图像对应的所述亮度数据绘制 gamma曲线包括:
根据当前所述灰阶图像对应的亮度数据计算对应的 gamma值;
根据每一个所述灰阶图像对应的灰阶值及对应的 gamma值建立坐标系, 绘制 gamma曲线。
5. 根据权利要求 4所述的处理显示模组亮度数据的方法, 其特征在于,根据当前所述灰阶图像对应的亮度数据 算相对应的 gamma值 包括: 将根据公式 i十算第一数值除以第二数值所获得的值作为当前所述灰阶图 像对应的 gamma值, 其中, 所述第一数值为当前所述灰阶图像对应的亮度数 据与第一次测量获得的亮度数据的差的绝对值, 所述第二数值为最后一次测 量获得的亮度数据与第一次测量获得的亮度数据的差的绝对值。
6. 根据权利要求 5所述的处理显示模组亮度数据的方法, 其特征在于, 所述预设规则还包括待测显示模组显示的所述灰阶图像的灰阶呈递增变化。
7. 根据权利要求 2所述的处理显示模组亮度数据的方法, 其特征在于, 所述预设规则还包括待测显示模组显示的所述灰阶图像的灰阶呈递增变 化, 且当存在灰阶值相同的具有部分灰阶画面的第一灰阶图像和具有全灰阶 画面的第二灰阶图像时, 优先显示所述第一灰阶图像;
所述根据所述多个灰阶图像对应的所述亮度数据对显示模组的交叉效应 进行校正的步骤包括:
将显示所述第一图像的待显示模组的预设点处的第一亮度数据、 显示所 述第二图像的待显示模组的预设点处的第二亮度数据与相应的灰阶画面的灰 阶值相对应存储, 所述预设点位于显示所述第一图像的待测显示模组显示灰 阶画面的区域;
根据所述第一亮度数据、 所述第二亮度数据获得与每一个灰阶值对应的 待测显示模组的交叉效应值;
将待測显示模组的交叉效应值与交叉效应预设值进行比对, 并根据所述 比对结果对显示模组的交叉效应值进行校正。
8. 根据权利要求 7所述的处理显示模组亮度数据的方法, 其特征在于, 所述根据所述第一亮度数据、 所述第二亮度数据获得待測显示模组的交 叉效应值的步骤包括:
按照公式计算所述第一亮度数据与所述第二亮度数据的差的绝对值与所 述第二亮度数据的比值, 来作为与每一个灰阶值对应的待测显示模组的交叉 效应值。
9. 一种处理显示模组亮度数据的系统, 其特征在于, 包括: 图像采集模 块、 控制模块、 显示模组驱动模块,
所述控制模块用于按照预设规则将多个灰阶图像发送至所述显示模组驱 动模块,并控制所述显示模组驱动模块将所述灰阶图像发送至待测显示模组, 使得待测显示模组显示所述灰阶图像;
所述图像采集模块用于采集显示当前所述灰阶图像的待测显示模组的预 设点处的亮度数据, 将所述亮度数据发送至所述控制模块;
其中, 所述预设规则为所述控制模块控制所述的显示模组驱动模块、 一 次仅发送一个灰阶图像至待测显示模组, 使得待测显示模组一次仅显示一个 所述灰阶图像, 且所述控制模块在上一个所述灰阶图像的亮度数据采集结束 后, 控制显示模组驱动模块发送下一个灰阶图像, 直至所有灰阶图像显示完 毕。
10. 根据权利要求 9所述的处理显示模组亮度数据的系统, 其特征在于, 所述控制模块还用于根据所述多个灰阶图像对应的所述亮度数据对显示 模组 gamma曲线进行校正;
和 /或
根据所述多个灰阶图像对应的所述亮度数据对显示模组的交叉效应进行 父止。
11. 根据权利要求 10所述的处理显示模组亮度数据的系统,其特征在于, 所述图像采集模块为光学测试探头。
12. 根据权利要求 11所述的处理显示模组亮度数据的系统,其特征在于, 所述控制模块包括:
通信参数设置模块, 用于完成串口的设置, 即波特率, 传输方式及 开关的设置;
液晶模组参数设置模块, 用于完成液晶模组基本信息输入, 即分辨 率、 接口方式、 传输方式、 速度的输入。
13. 根据权利要求 12所述的处理显示模组亮度数据的系统, 其特征在 于,
还包括:
液晶模组代码传送功能设置模块, 用于完成液晶模组初始化代码的 导入及输入, 可进行代码的更改;
图像数据下载功能模块, 用于完成图像的预览及图像从控制模块下 载到显示模组驱动模块;
光学测试探头参数设置模块, 用于完成光学测试探头的校准、 测试 项目、 通道选择; 以及
软按键操作功能模块, 用于通过软件界面上的按键, 一键式完成相 对应的操作, 包括给显示模组驱动模块或光学測试探头发送命令, 显示 模组驱动模块或光学测试探头接收命令后完成相应的动作, 即上电, 关 电、 获取 gamma曲线。
14. 一种显示器件, 其特征在于, 包括权利要求 9 13任一所述的处理显 示模组亮度数据的系统。
PCT/CN2013/087612 2013-08-15 2013-11-21 一种处理显示模组亮度数据方法、系统及显示器件 WO2015021705A1 (zh)

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