WO2020073545A1 - Method and apparatus for automatically adjusting overdrive voltage, and display panel - Google Patents

Method and apparatus for automatically adjusting overdrive voltage, and display panel Download PDF

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Publication number
WO2020073545A1
WO2020073545A1 PCT/CN2019/070043 CN2019070043W WO2020073545A1 WO 2020073545 A1 WO2020073545 A1 WO 2020073545A1 CN 2019070043 W CN2019070043 W CN 2019070043W WO 2020073545 A1 WO2020073545 A1 WO 2020073545A1
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Prior art keywords
smear
overdrive voltage
gray scale
display panel
red
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PCT/CN2019/070043
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French (fr)
Chinese (zh)
Inventor
陈俊吉
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惠州市华星光电技术有限公司
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Publication of WO2020073545A1 publication Critical patent/WO2020073545A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays

Definitions

  • the invention relates to the field of electronic display, and in particular to a method, device and display panel for automatically adjusting overdrive voltage.
  • Thin-film transistor liquid crystal display compared with cathode ray picture tube (Cathode Ray Tube (CRT) displays have many advantages, including small size, high resolution, low power consumption, light weight and no radiation, etc., so they are widely used in televisions, computers and other mobile communication fields.
  • TFT-LCD Thin-film transistor liquid crystal display
  • CRT cathode Ray Tube
  • the LCD monitor displays a fast moving image
  • the LCD may have blurred edges or smearing, the picture is unclear, and the user experience is reduced.
  • Over driving (OD) technology is a new technology that can effectively improve the gray scale response speed of the liquid crystal.
  • OD Over driving
  • the invention provides a method, device and display panel for automatically adjusting an overdrive voltage to solve the technical problem that the overdrive voltage cannot be automatically adjusted in the prior art.
  • a method for automatically adjusting overdrive voltage includes the following steps:
  • the method for calculating the red smear distance corresponding to the red pixels at different gray levels is:
  • the grayscale value of the area where the moving image has not passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale and the grayscale of the area where the mobile image is It is the second gray scale, the second gray scale is smaller than the first gray scale, and the gray scale of the smear area is the third gray scale, the third gray scale is larger than the second gray scale and not equal to the first gray scale;
  • This length is the smear distance.
  • the method of calculating the green smear distance corresponding to the green pixels at different gray levels and the method of calculating the blue smear distance corresponding to the blue pixels at different gray levels are different
  • the method of the red smear distance corresponding to the red pixels under the order is the same.
  • the input moving image is a rectangle
  • the moving direction of the rectangle is parallel to one side of the display panel.
  • the method before performing the white balance adjustment, the method further includes:
  • the present invention also provides a device for automatically adjusting the overdrive voltage, which includes:
  • the first adjustment unit is used to adjust the white balance of the display panel
  • the first control unit is used to light up the solid color pictures corresponding to the red pixels under different gray levels
  • the first calculation unit is used to calculate the red smear distance corresponding to the red pixels under different gray levels
  • the first comparison unit is used to compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage included in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
  • the second control unit to light up the solid color pictures corresponding to the green pixels under different gray levels
  • the second calculation unit calculates the green smear distance corresponding to the green pixels at different gray levels
  • the second comparison unit compares the green smear distances corresponding to the green pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest green smudge distance as the overdrive voltage of the green pixels;
  • the third control unit light up the solid color picture corresponding to the blue pixels under different gray levels
  • the third calculation unit calculates the blue smear distance corresponding to the blue pixels under different gray levels
  • the third comparison unit compares the blue smear distances corresponding to blue pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels .
  • the first calculation unit includes:
  • the input module is used to input a moving image whose gray scale is smaller than that of the current display panel
  • the shooting module is used to take photos of the display panel at any moment during the image movement
  • the analysis module is used to analyze and obtain the grayscale values of different areas on the display panel.
  • the grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale and the moving image.
  • the gray scale of the area is the second gray scale
  • the second gray scale is smaller than the first gray scale
  • the gray scale of the smear area is the third gray scale
  • the third gray scale is greater than the second gray scale and is not equal to the first gray scale Order
  • the measurement module is used to measure the length of the smear area along the moving direction of the image, and the length is the smear distance.
  • the second computing unit and the third computing unit have the same structure as the first computing unit.
  • the input moving image is a rectangle
  • the moving direction of the rectangle is parallel to one side of the display panel.
  • the device for automatically adjusting the overdrive voltage further includes:
  • the second adjustment unit is used to adjust the gamma curve of the display panel.
  • the present invention also provides a display panel, which includes a device for automatically adjusting the overdrive voltage.
  • the device includes:
  • the first adjustment unit is used to adjust the white balance of the display panel
  • the first control unit is used to light up the solid color pictures corresponding to the red pixels under different gray levels
  • the first calculation unit is used to calculate the red smear distance corresponding to the red pixels under different gray levels
  • the first comparison unit is used to compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage included in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
  • the second control unit to light up the solid color pictures corresponding to the green pixels under different gray levels
  • the second calculation unit calculates the green smear distance corresponding to the green pixels at different gray levels
  • the second comparison unit compares the green smear distances corresponding to the green pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest green smudge distance as the overdrive voltage of the green pixels;
  • the third control unit light up the solid color picture corresponding to the blue pixels under different gray levels
  • the third calculation unit calculates the blue smear distance corresponding to the blue pixels under different gray levels
  • the third comparison unit compares the blue smear distances corresponding to blue pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels .
  • the first calculation unit includes:
  • the input module is used to input a moving image whose gray scale is smaller than that of the current display panel
  • the shooting module is used to take photos of the display panel at any moment during the image movement
  • the analysis module is used to analyze and obtain the grayscale values of different areas on the display panel.
  • the grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale and the moving image.
  • the gray scale of the area is the second gray scale
  • the second gray scale is smaller than the first gray scale
  • the gray scale of the smear area is the third gray scale
  • the third gray scale is greater than the second gray scale and is not equal to the first gray scale Order
  • the measurement module is used to measure the length of the smear area along the moving direction of the image, and the length is the smear distance.
  • the second computing unit and the third computing unit have the same structure as the first computing unit.
  • the input moving image is a rectangle
  • the moving direction of the rectangle is parallel to one side of the display panel.
  • the method before performing white balance adjustment, the method further includes:
  • the second adjustment unit is used to adjust the gamma curve of the display panel.
  • the present invention first adjusts the white balance of the display panel, then lights up the solid color images corresponding to different pixels under different gray levels, calculates the red smear distance corresponding to different pixels under different gray levels, and selects the smallest smear distance corresponding to
  • the over-driving voltage contained in the gray-scale signal is used as the over-driving voltage of different pixels, so as to realize the manual adjustment of the over-driving voltage, which effectively saves costs and improves efficiency.
  • FIG. 1 is a flowchart of a method for automatically adjusting an overdrive voltage in an embodiment of the present invention
  • FIG. 2 is a diagram of the relationship between the driving signal and the brightness of the display panel in the prior art
  • FIG. 3 is a schematic diagram of smearing generated on the display panel by the driving signal in FIG. 2;
  • FIG. 5 is an explanatory diagram of a method of calculating smear distance in an embodiment of the present invention.
  • the methods discussed below can be implemented in hardware, software, firmware, middleware, microcode, hardware description languages, or any combination thereof.
  • the program code or code segments to perform the necessary tasks may be stored in a machine or computer readable medium (such as a storage medium).
  • the processor (s) can perform the necessary tasks.
  • first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another.
  • first unit may be referred to as the second unit, and similarly the second unit may be referred to as the first unit.
  • the term "and / or” includes any and all combinations of one or more of the associated listed items.
  • the liquid crystal response time is the reaction speed of each pixel of the panel to the applied voltage, that is, the pixel changes from bright to dark or dark to bright, and the applied voltage changes from high level to low level or voltage from low level to high level.
  • the time required for the conversion is based on the principle that the liquid crystal cell is affected by the applied voltage, and the liquid crystal molecules twist and recover. The shorter the response time of the LCD, the more the user will see the smooth and fluent dynamic picture, and will not see the phenomenon of smearing and smearing.
  • FIG. 2 is a diagram of the relationship between the driving signal and the brightness of the display panel in the prior art. It can be seen that due to the long response time of the liquid crystal, when the gate is closed, the brightness is not saturated, which will cause dynamic The screen produces smear, as shown in Figure 3.
  • This phenomenon can be improved by applying overdriving technology.
  • the principle is to apply more than expected voltage across the liquid crystal capacitor and use a strong electric field to accelerate the rotation process of the liquid crystal molecules, thereby reducing the liquid crystal response time.
  • the OD voltage needs to be debugged.
  • the grayscale color of the LCD will change with the change of the driving voltage, white balance adjustment is required.
  • white balance due to the different voltages corresponding to the colors of different pixels, if the same voltage is used, the problem of color drag will occur due to the different degrees of smearing of different pixel colors. Therefore, it is necessary to manually debug each pixel one by one to determine the overdrive voltage. This process is time-consuming, costly, and inefficient.
  • the present invention provides a method for automatically adjusting an overdrive voltage. Specifically, the method includes the following steps:
  • the minimum smear distance of blue light may be calculated first, and then the minimum smear distance of red light and green light may be calculated in sequence. Or you can first calculate the minimum smear distance of green light, and then calculate the minimum smear distance of blue light and red light in turn.
  • the color sequence cannot be interpreted as a limitation of the present invention.
  • the method of calculating the red smear distance corresponding to the red pixels under different gray levels is: inputting a moving image whose gray level is smaller than the gray level of the current display panel; shooting at any moment in the image moving process Display panel photos; analyze and obtain the grayscale values of different areas on the display panel, where the grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale
  • the gray scale of the area is the second gray scale, the second gray scale is smaller than the first gray scale, the gray scale of the smear area is the third gray scale, the third gray scale is greater than the second gray scale and is not equal to the first gray scale ; Measure the length of the smear area along the moving direction of the image, which is the smear distance.
  • the method of calculating the green smear distance corresponding to the green pixels at different gray levels and the method of calculating the blue smear distance corresponding to the blue pixels at different gray levels and calculating the red corresponding to the red pixels at different gray levels is the same.
  • the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
  • the white balance adjustment before performing the white balance adjustment, it also includes adjusting the gamma curve of the display panel.
  • the present invention first adjusts the white balance of the display panel, then lights up the solid color images corresponding to different pixels under different gray levels, calculates the red smear distance corresponding to different pixels under different gray levels, and selects the smallest smear distance corresponding to
  • the over-driving voltage contained in the gray-scale signal is used as the over-driving voltage of different pixels, so as to realize the manual adjustment of the over-driving voltage, which effectively saves costs and improves efficiency.
  • the invention also provides a device for automatically adjusting the overdrive voltage, including:
  • the first adjustment unit is used to adjust the white balance of the display panel
  • the first control unit is used to light up the solid color pictures corresponding to the red pixels under different gray levels
  • the first calculation unit is used to calculate the red smear distance corresponding to the red pixels under different gray levels
  • the first comparison unit is used to compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage included in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
  • the second control unit to light up the solid color pictures corresponding to the green pixels under different gray levels
  • the second calculation unit calculates the green smear distance corresponding to the green pixels at different gray levels
  • the second comparison unit compares the green smear distances corresponding to the green pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest green smudge distance as the overdrive voltage of the green pixels;
  • the third control unit light up the solid color picture corresponding to the blue pixels under different gray levels
  • the third calculation unit calculates the blue smear distance corresponding to the blue pixels under different gray levels
  • the third comparison unit compares the blue smear distances corresponding to blue pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels .
  • the first calculation unit includes:
  • the input module is used to input a moving image whose gray scale is smaller than that of the current display panel
  • the shooting module is used to take photos of the display panel at any moment during the image movement
  • the analysis module is used to analyze and obtain the grayscale values of different areas on the display panel, wherein the grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale
  • the gray scale of the area is the second gray scale
  • the second gray scale is smaller than the first gray scale
  • the gray scale of the smear area is the third gray scale
  • the third gray scale is greater than the second gray scale and is not equal to the first gray scale Order
  • the measurement module is used to measure the length of the smear area along the moving direction of the image, and the length is the smear distance.
  • the second computing unit and the third computing unit have the same structure as the first computing unit.
  • the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
  • the device for automatically adjusting the overdrive voltage further includes a second adjusting unit, which is used to adjust the gamma curve of the display panel.
  • the present invention also provides a display panel including the device for automatically adjusting the overdrive voltage as described above.

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Abstract

A method and apparatus for automatically adjusting overdrive voltage, the method comprising: performing white balance adjustment; lighting up a solid color screen corresponding to red pixel points; calculating red ghosting distances, and determining the overdrive voltage of the red pixel points according to the smallest red ghosting distance; lighting up a solid color screen corresponding to green pixel points; calculating green ghosting distances, and determining the overdrive voltage of the green pixel points according to the smallest green ghosting distance; lighting up a solid color screen corresponding to blue pixel points; calculating blue ghosting distances, and determining the overdrive voltage of the blue pixel points according to the smallest blue ghosting distance.

Description

自动调整过驱动电压的方法、装置和显示面板Method, device and display panel for automatically adjusting overdrive voltage 技术领域Technical field
本发明涉及电子显示领域，尤其涉及一种自动调整过驱动电压的方法、装置和显示面板。The invention relates to the field of electronic display, and in particular to a method, device and display panel for automatically adjusting overdrive voltage.
背景技术Background technique
薄膜晶体管液晶显示器(TFT-LCD)较阴极射线显像管（Cathode Ray Tube，CRT）显示器有很多优点，包括体积小、分辨率高、功率消耗低、重量轻和没有辐射等，因此在电视、电脑和其他移动通信领域被广泛应用。但是LCD显示器在显示快速的运动图像时，由于液晶的响应时间较长，LCD 会出现边缘模糊或拖影现象，画面不清楚，降低用户体验。Thin-film transistor liquid crystal display (TFT-LCD) compared with cathode ray picture tube (Cathode Ray Tube (CRT) displays have many advantages, including small size, high resolution, low power consumption, light weight and no radiation, etc., so they are widely used in televisions, computers and other mobile communication fields. However, when the LCD monitor displays a fast moving image, due to the longer response time of the liquid crystal, the LCD may have blurred edges or smearing, the picture is unclear, and the user experience is reduced.
过驱动（Over Driving，OD）技术就是一种能够有效提高液晶灰阶响应速度的新技术，通过在液晶电容两端施加超过预期的电压，利用强电场来加速液晶分子的旋转过程，以此降低液晶的响应时间。Over driving (OD) technology is a new technology that can effectively improve the gray scale response speed of the liquid crystal. By applying a voltage exceeding the expected across the liquid crystal capacitor, a strong electric field is used to accelerate the rotation process of the liquid crystal molecules, thereby reducing LCD response time.
技术问题technical problem
由于LCD的灰阶颜色会随驱动电压的变化发生改变, 所以需采用白平衡调整。但在白平衡状况下，由于不同像素颜色对应的电压不同，如果采用相同的电压，会由于不同像素颜色的拖影程度不同而产生拖色问题。因此，需要对每个像素点逐一进行人工调试，确定过驱动电压，这一过程耗时久、成本高、效率低。Since the grayscale color of the LCD will change with the change of the driving voltage, white balance adjustment is required. However, in the case of white balance, due to the different voltages corresponding to the colors of different pixels, if the same voltage is used, the problem of color drag will occur due to the different degrees of smearing of different pixel colors. Therefore, it is necessary to manually debug each pixel one by one to determine the overdrive voltage. This process is time-consuming, costly, and inefficient.
技术解决方案Technical solution
本发明提供一种自动调整过驱动电压的方法、装置和显示面板，以解决现有技术中过驱动电压无法自动调整的技术问题。The invention provides a method, device and display panel for automatically adjusting an overdrive voltage to solve the technical problem that the overdrive voltage cannot be automatically adjusted in the prior art.
为解决上述问题，本发明提供的技术方案如下：To solve the above problems, the technical solutions provided by the present invention are as follows:
一种自动调整过驱动电压的方法，其包括以下步骤：A method for automatically adjusting overdrive voltage includes the following steps:
对显示面板进行白平衡调整；Adjust the white balance of the display panel;
点亮不同灰阶下红色像素点对应的纯色画面；Light up the solid color pictures corresponding to the red pixels under different gray levels;
计算不同灰阶下红色像素点对应的红色拖影距离；Calculate the red smear distance corresponding to the red pixels under different gray levels;
比较不同灰阶下红色像素点对应的红色拖影距离，选取最小的红色拖影距离对应的灰阶信号中包含的过驱动电压作为红色像素点的过驱动电压；Compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
点亮不同灰阶下绿色像素点对应的纯色画面；Light up the solid color images corresponding to the green pixels at different gray levels;
计算不同灰阶下绿色像素点对应的绿色拖影距离；Calculate the green smear distance corresponding to the green pixels at different gray levels;
比较不同灰阶下绿色像素点对应的绿色拖影距离，选取最小的绿色拖影距离对应的灰阶信号中包含的过驱动电压作为绿色像素点的过驱动电压；Compare the green smear distance corresponding to the green pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest green smear distance as the overdrive voltage of the green pixels;
点亮不同灰阶下蓝色像素点对应的纯色画面；Light up the solid color picture corresponding to the blue pixels under different gray levels;
计算不同灰阶下蓝色像素点对应的蓝色拖影距离；Calculate the blue smear distance corresponding to blue pixels under different gray levels;
比较不同灰阶下蓝色像素点对应的蓝色拖影距离，选取最小的蓝色拖影距离对应的灰阶信号中包含的过驱动电压作为蓝色像素点的过驱动电压。Compare the blue smear distances corresponding to blue pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels.
根据本发明提供的一个具体实施例，其中计算不同灰阶下红色像素点对应的红色拖影距离的方法为：According to a specific embodiment provided by the present invention, the method for calculating the red smear distance corresponding to the red pixels at different gray levels is:
输入移动图像，所述移动图像的灰阶小于当前显示面板的灰阶；Enter a moving image whose gray scale is smaller than the gray scale of the current display panel;
拍摄在图像移动过程中任一时刻的显示面板照片；Take a picture of the display panel at any moment during the movement of the image;
分析获取显示面板上不同区域的灰阶值，其中，移动图像还未经过的区域的灰阶值等于移动图像已经经过的区域的灰阶值，为第一灰阶、移动图像所在区域的灰阶为第二灰阶，第二灰阶小于第一灰阶、拖影区域的灰阶为第三灰阶，所述第三灰阶大于第二灰阶且不等于第一灰阶；Analyze and obtain the grayscale values of different areas on the display panel, where the grayscale value of the area where the moving image has not passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale and the grayscale of the area where the mobile image is It is the second gray scale, the second gray scale is smaller than the first gray scale, and the gray scale of the smear area is the third gray scale, the third gray scale is larger than the second gray scale and not equal to the first gray scale;
测量拖影区域沿图像移动方向的长度，该长度为拖影距离。Measure the length of the smear area along the moving direction of the image. This length is the smear distance.
根据本发明提供的一个具体实施例，其中计算不同灰阶下绿色像素点对应的绿色拖影距离的方法和计算不同灰阶下蓝色像素点对应的蓝色拖影距离的方法与计算不同灰阶下红色像素点对应的红色拖影距离的方法相同。According to a specific embodiment provided by the present invention, the method of calculating the green smear distance corresponding to the green pixels at different gray levels and the method of calculating the blue smear distance corresponding to the blue pixels at different gray levels are different The method of the red smear distance corresponding to the red pixels under the order is the same.
根据本发明提供的一个具体实施例，其中所述输入的移动图像为矩形，所述矩形的移动方向与显示面板的一条边平行。According to a specific embodiment provided by the present invention, wherein the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
根据本发明提供的一个具体实施例，其中在进行白平衡调整之前，还包括：According to a specific embodiment provided by the present invention, before performing the white balance adjustment, the method further includes:
对显示面板进行gamma曲线调整。Adjust the gamma curve of the display panel.
相应的，本发明还提供了一种自动调整过驱动电压的装置，其包括：Correspondingly, the present invention also provides a device for automatically adjusting the overdrive voltage, which includes:
第一调整单元，用于对显示面板进行白平衡调整；The first adjustment unit is used to adjust the white balance of the display panel;
第一控制单元，用于点亮不同灰阶下红色像素点对应的纯色画面；The first control unit is used to light up the solid color pictures corresponding to the red pixels under different gray levels;
第一计算单元，用于计算不同灰阶下红色像素点对应的红色拖影距离；The first calculation unit is used to calculate the red smear distance corresponding to the red pixels under different gray levels;
第一比较单元，用于比较不同灰阶下红色像素点对应的红色拖影距离，选取最小的红色拖影距离对应的灰阶信号中包含的过驱动电压作为红色像素点的过驱动电压；The first comparison unit is used to compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage included in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
第二控制单元，点亮不同灰阶下绿色像素点对应的纯色画面；The second control unit to light up the solid color pictures corresponding to the green pixels under different gray levels;
第二计算单元，计算不同灰阶下绿色像素点对应的绿色拖影距离；The second calculation unit calculates the green smear distance corresponding to the green pixels at different gray levels;
第二比较单元，比较不同灰阶下绿色像素点对应的绿色拖影距离，选取最小的绿色拖影距离对应的灰阶信号中包含的过驱动电压作为绿色像素点的过驱动电压；The second comparison unit compares the green smear distances corresponding to the green pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest green smudge distance as the overdrive voltage of the green pixels;
第三控制单元，点亮不同灰阶下蓝色像素点对应的纯色画面；The third control unit, light up the solid color picture corresponding to the blue pixels under different gray levels;
第三计算单元，计算不同灰阶下蓝色像素点对应的蓝色拖影距离；The third calculation unit calculates the blue smear distance corresponding to the blue pixels under different gray levels;
第三比较单元，比较不同灰阶下蓝色像素点对应的蓝色拖影距离，选取最小的蓝色拖影距离对应的灰阶信号中包含的过驱动电压作为蓝色像素点的过驱动电压。The third comparison unit compares the blue smear distances corresponding to blue pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels .
根据本发明提供的一个具体实施例，其中第一计算单元包括：According to a specific embodiment provided by the present invention, the first calculation unit includes:
输入模块，用于输入移动图像，所述移动图像的灰阶小于当前显示面板的灰阶；The input module is used to input a moving image whose gray scale is smaller than that of the current display panel;
拍摄模块，用于拍摄在图像移动过程中任一时刻的显示面板照片；The shooting module is used to take photos of the display panel at any moment during the image movement;
分析模块，用于分析获取显示面板上不同区域的灰阶值，其中，移动图像还未经过的区域的灰阶值等于移动图像已经经过的区域的灰阶值，为第一灰阶、移动图像所在区域的灰阶为第二灰阶，第二灰阶小于第一灰阶、拖影区域的灰阶为第三灰阶，所述第三灰阶大于第二灰阶且不等于第一灰阶；The analysis module is used to analyze and obtain the grayscale values of different areas on the display panel. The grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale and the moving image. The gray scale of the area is the second gray scale, the second gray scale is smaller than the first gray scale, the gray scale of the smear area is the third gray scale, the third gray scale is greater than the second gray scale and is not equal to the first gray scale Order
测量模块，用于测量拖影区域沿图像移动方向的长度，该长度为拖影距离。The measurement module is used to measure the length of the smear area along the moving direction of the image, and the length is the smear distance.
根据本发明提供的一个具体实施例，其中所述第二计算单元和第三计算单元与第一计算单元的结构相同。According to a specific embodiment provided by the present invention, wherein the second computing unit and the third computing unit have the same structure as the first computing unit.
根据本发明提供的一个具体实施例，其中所述输入的移动图像为矩形，所述矩形的移动方向与显示面板的一条边平行。According to a specific embodiment provided by the present invention, wherein the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
根据本发明提供的一个具体实施例，自动调整过驱动电压的装置还包括：According to a specific embodiment provided by the present invention, the device for automatically adjusting the overdrive voltage further includes:
第二调整单元，用于对显示面板进行gamma曲线调整。The second adjustment unit is used to adjust the gamma curve of the display panel.
相应的，本发明还提供了一种显示面板，其包括一种自动调整过驱动电压的装置，所述装置包括：Correspondingly, the present invention also provides a display panel, which includes a device for automatically adjusting the overdrive voltage. The device includes:
第一调整单元，用于对显示面板进行白平衡调整；The first adjustment unit is used to adjust the white balance of the display panel;
第一控制单元，用于点亮不同灰阶下红色像素点对应的纯色画面；The first control unit is used to light up the solid color pictures corresponding to the red pixels under different gray levels;
第一计算单元，用于计算不同灰阶下红色像素点对应的红色拖影距离；The first calculation unit is used to calculate the red smear distance corresponding to the red pixels under different gray levels;
第一比较单元，用于比较不同灰阶下红色像素点对应的红色拖影距离，选取最小的红色拖影距离对应的灰阶信号中包含的过驱动电压作为红色像素点的过驱动电压；The first comparison unit is used to compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage included in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
第二控制单元，点亮不同灰阶下绿色像素点对应的纯色画面；The second control unit to light up the solid color pictures corresponding to the green pixels under different gray levels;
第二计算单元，计算不同灰阶下绿色像素点对应的绿色拖影距离；The second calculation unit calculates the green smear distance corresponding to the green pixels at different gray levels;
第二比较单元，比较不同灰阶下绿色像素点对应的绿色拖影距离，选取最小的绿色拖影距离对应的灰阶信号中包含的过驱动电压作为绿色像素点的过驱动电压；The second comparison unit compares the green smear distances corresponding to the green pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest green smudge distance as the overdrive voltage of the green pixels;
第三控制单元，点亮不同灰阶下蓝色像素点对应的纯色画面；The third control unit, light up the solid color picture corresponding to the blue pixels under different gray levels;
第三计算单元，计算不同灰阶下蓝色像素点对应的蓝色拖影距离；The third calculation unit calculates the blue smear distance corresponding to the blue pixels under different gray levels;
第三比较单元，比较不同灰阶下蓝色像素点对应的蓝色拖影距离，选取最小的蓝色拖影距离对应的灰阶信号中包含的过驱动电压作为蓝色像素点的过驱动电压。The third comparison unit compares the blue smear distances corresponding to blue pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels .
根据本发明提供的一个具体实施例，第一计算单元包括：According to a specific embodiment provided by the present invention, the first calculation unit includes:
输入模块，用于输入移动图像，所述移动图像的灰阶小于当前显示面板的灰阶；The input module is used to input a moving image whose gray scale is smaller than that of the current display panel;
拍摄模块，用于拍摄在图像移动过程中任一时刻的显示面板照片；The shooting module is used to take photos of the display panel at any moment during the image movement;
分析模块，用于分析获取显示面板上不同区域的灰阶值，其中，移动图像还未经过的区域的灰阶值等于移动图像已经经过的区域的灰阶值，为第一灰阶、移动图像所在区域的灰阶为第二灰阶，第二灰阶小于第一灰阶、拖影区域的灰阶为第三灰阶，所述第三灰阶大于第二灰阶且不等于第一灰阶；The analysis module is used to analyze and obtain the grayscale values of different areas on the display panel. The grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale and the moving image. The gray scale of the area is the second gray scale, the second gray scale is smaller than the first gray scale, the gray scale of the smear area is the third gray scale, the third gray scale is greater than the second gray scale and is not equal to the first gray scale Order
测量模块，用于测量拖影区域沿图像移动方向的长度，该长度为拖影距离。The measurement module is used to measure the length of the smear area along the moving direction of the image, and the length is the smear distance.
根据本发明提供的一个具体实施例，所述第二计算单元和第三计算单元与第一计算单元的结构相同。According to a specific embodiment provided by the present invention, the second computing unit and the third computing unit have the same structure as the first computing unit.
根据本发明提供的一个具体实施例，所述输入的移动图像为矩形，所述矩形的移动方向与显示面板的一条边平行。According to a specific embodiment provided by the present invention, the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
根据本发明提供的一个具体实施例，在进行白平衡调整之前，还包括：According to a specific embodiment provided by the present invention, before performing white balance adjustment, the method further includes:
第二调整单元，用于对显示面板进行gamma曲线调整。The second adjustment unit is used to adjust the gamma curve of the display panel.
有益效果Beneficial effect
本发明首先对显示面板进行白平衡调整，之后点亮不同灰阶下不同像素点对应的纯色画面，计算出不同灰阶下不同像素点对应的红色拖影距离，并选取最小的拖影距离对应的灰阶信号中包含的过驱动电压作为不同像素点的过驱动电压，从而实现过驱动电压的手动调整，有效节约了成本，提高了效率。The present invention first adjusts the white balance of the display panel, then lights up the solid color images corresponding to different pixels under different gray levels, calculates the red smear distance corresponding to different pixels under different gray levels, and selects the smallest smear distance corresponding to The over-driving voltage contained in the gray-scale signal is used as the over-driving voltage of different pixels, so as to realize the manual adjustment of the over-driving voltage, which effectively saves costs and improves efficiency.
附图说明BRIEF DESCRIPTION
图1是本发明的一个实施例中的自动调整过驱动电压的方法的流程图；FIG. 1 is a flowchart of a method for automatically adjusting an overdrive voltage in an embodiment of the present invention;
图2是现有技术中的驱动信号与显示面板的亮度之间的关系图；2 is a diagram of the relationship between the driving signal and the brightness of the display panel in the prior art;
图3是图2中的驱动信号在显示面板上产生的拖影的示意图；3 is a schematic diagram of smearing generated on the display panel by the driving signal in FIG. 2;
图4是现有技术中的过驱动信号与显示面板的亮度之间的关系图；4 is a diagram of the relationship between the overdrive signal and the brightness of the display panel in the prior art;
图5是本发明的一个实施例中的计算拖影距离的方法说明图。5 is an explanatory diagram of a method of calculating smear distance in an embodiment of the present invention.
本发明的实施方式Embodiments of the invention
在更加详细地讨论示例性实施例之前应当提到的是，一些示例性实施例被描述成作为流程图描绘的处理或方法。虽然流程图将各项操作描述成顺序的处理，但是其中的许多操作可以被并行地、并发地或者同时实施。此外，各项操作的顺序可以被重新安排。还应当提到的是，在一些替换实现方式中，所提到的功能/动作可以按照不同于附图中标示的顺序发生。举例来说，取决于所涉及的功能/动作，相继示出的两幅图实际上可以基本上同时执行或者有时可以按照相反的顺序来执行。Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowchart describes various operations as sequential processing, many of the operations can be implemented in parallel, concurrently, or simultaneously. In addition, the sequence of operations can be rearranged. It should also be mentioned that in some alternative implementations, the functions / acts noted may occur out of the order noted in the figures. For example, depending on the function / action involved, the two figures shown in succession may actually be executed substantially simultaneously or sometimes in the reverse order.
后面所讨论的方法（其中一些通过流程图示出）可以通过硬件、软件、固件、中间件、微代码、硬件描述语言或者其任意组合来实施。当用软件、固件、中间件或微代码来实施时，用以实施必要任务的程序代码或代码段可以被存储在机器或计算机可读介质（比如存储介质）中。（一个或多个）处理器可以实施必要的任务。The methods discussed below (some of which are shown through flowcharts) can be implemented in hardware, software, firmware, middleware, microcode, hardware description languages, or any combination thereof. When implemented in software, firmware, middleware or microcode, the program code or code segments to perform the necessary tasks may be stored in a machine or computer readable medium (such as a storage medium). The processor (s) can perform the necessary tasks.
这里所公开的具体结构和功能细节仅仅是代表性的，并且是用于描述本申请的示例性实施例的目的。但是本申请可以通过许多替换形式来具体实现，并且不应当被解释成仅仅受限于这里所阐述的实施例。The specific structural and functional details disclosed herein are merely representative and are for the purpose of describing exemplary embodiments of the present application. However, this application can be implemented in many alternative forms, and should not be interpreted as being limited to the embodiments set forth herein.
应当理解的是，虽然在这里可能使用了术语“第一”、“第二”等等来描述各个单元，但是这些单元不应当受这些术语限制。使用这些术语仅仅是为了将一个单元与另一个单元进行区分。举例来说，在不背离示例性实施例的范围的情况下，第一单元可以被称为第二单元，并且类似地第二单元可以被称为第一单元。这里所使用的术语“和/或”包括其中一个或更多所列出的相关联项目的任意和所有组合。It should be understood that although the terms "first", "second", etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiment, the first unit may be referred to as the second unit, and similarly the second unit may be referred to as the first unit. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
液晶响应时间是面板各像素点对所施加电压的反应速度，即像素从亮到暗或从暗到亮，施加的电压从高电平到低电平或电压从低电平到高电平转换，转换所需要的时间，其原理是液晶单元受到施加电压的影响，液晶分子扭转与回复。液晶响应时间越短，则用户就越会看到顺畅流利的动态画面，不会看到拖尾拖色残影等现象。参见图2，图2是现有技术中的驱动信号与显示面板的亮度之间的关系图，可以看出，由于液晶响应的时间较长，闸极关闭时, 亮度还未饱和，会导致动态画面产生拖影，如图3所示。The liquid crystal response time is the reaction speed of each pixel of the panel to the applied voltage, that is, the pixel changes from bright to dark or dark to bright, and the applied voltage changes from high level to low level or voltage from low level to high level. The time required for the conversion is based on the principle that the liquid crystal cell is affected by the applied voltage, and the liquid crystal molecules twist and recover. The shorter the response time of the LCD, the more the user will see the smooth and fluent dynamic picture, and will not see the phenomenon of smearing and smearing. Referring to FIG. 2, FIG. 2 is a diagram of the relationship between the driving signal and the brightness of the display panel in the prior art. It can be seen that due to the long response time of the liquid crystal, when the gate is closed, the brightness is not saturated, which will cause dynamic The screen produces smear, as shown in Figure 3.
通过应用过驱动技术可以改善这一现象，其原理是在液晶电容两端施加超过预期的电压，利用强电场来加速液晶分子的旋转过程，以此降低液晶响应时间。但如果OD电压太大，亮度超过饱和区后再恢复，同样会使响应时间变大，如图4所示，因此需要对OD电压进行调试。由于LCD的灰阶颜色会随驱动电压的变化发生改变, 所以需采用白平衡调整。但在白平衡状况下，由于不同像素颜色对应的电压不同，如果采用相同的电压，会由于不同像素颜色的拖影程度不同而产生拖色问题。因此，需要对每个像素点逐一进行人工调试，确定过驱动电压，这一过程耗时久、成本高、效率低。This phenomenon can be improved by applying overdriving technology. The principle is to apply more than expected voltage across the liquid crystal capacitor and use a strong electric field to accelerate the rotation process of the liquid crystal molecules, thereby reducing the liquid crystal response time. However, if the OD voltage is too large, the brightness will exceed the saturation area and then resume, it will also make the response time become larger, as shown in Figure 4, so the OD voltage needs to be debugged. Since the grayscale color of the LCD will change with the change of the driving voltage, white balance adjustment is required. However, in the case of white balance, due to the different voltages corresponding to the colors of different pixels, if the same voltage is used, the problem of color drag will occur due to the different degrees of smearing of different pixel colors. Therefore, it is necessary to manually debug each pixel one by one to determine the overdrive voltage. This process is time-consuming, costly, and inefficient.
参见图1，本发明提供了一种自动调整过驱动电压的方法，具体的，所述方法包括以下步骤：Referring to FIG. 1, the present invention provides a method for automatically adjusting an overdrive voltage. Specifically, the method includes the following steps:
对显示面板进行白平衡调整；Adjust the white balance of the display panel;
点亮不同灰阶下红色像素点对应的纯色画面；Light up the solid color pictures corresponding to the red pixels under different gray levels;
计算不同灰阶下红色像素点对应的红色拖影距离；Calculate the red smear distance corresponding to the red pixels under different gray levels;
比较不同灰阶下红色像素点对应的红色拖影距离，选取最小的红色拖影距离对应的灰阶信号中包含的过驱动电压作为红色像素点的过驱动电压；Compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
点亮不同灰阶下绿色像素点对应的纯色画面；Light up the solid color images corresponding to the green pixels at different gray levels;
计算不同灰阶下绿色像素点对应的绿色拖影距离；Calculate the green smear distance corresponding to the green pixels at different gray levels;
比较不同灰阶下绿色像素点对应的绿色拖影距离，选取最小的绿色拖影距离对应的灰阶信号中包含的过驱动电压作为绿色像素点的过驱动电压；Compare the green smear distance corresponding to the green pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest green smear distance as the overdrive voltage of the green pixels;
点亮不同灰阶下蓝色像素点对应的纯色画面；Light up the solid color picture corresponding to the blue pixels under different gray levels;
计算不同灰阶下蓝色像素点对应的蓝色拖影距离；Calculate the blue smear distance corresponding to blue pixels under different gray levels;
比较不同灰阶下蓝色像素点对应的蓝色拖影距离，选取最小的蓝色拖影距离对应的灰阶信号中包含的过驱动电压作为蓝色像素点的过驱动电压。Compare the blue smear distances corresponding to the blue pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels.
需要说明的是，上述步骤的顺序仅仅用于示例性的说明本发明，实际中各项操作的顺序可以被重新安排。举例来说，在本发明的其他实施例中，可以先计算蓝光的最小拖影距离，再依次计算红光和绿光的最小拖影距离。或者还可以先计算绿光的最小拖影距离，再依次计算蓝光和红光的最小拖影距离。颜色顺序并不能解释为对本发明的限制。It should be noted that the sequence of the above steps is only used to illustrate the present invention, and the sequence of operations in practice may be rearranged. For example, in other embodiments of the present invention, the minimum smear distance of blue light may be calculated first, and then the minimum smear distance of red light and green light may be calculated in sequence. Or you can first calculate the minimum smear distance of green light, and then calculate the minimum smear distance of blue light and red light in turn. The color sequence cannot be interpreted as a limitation of the present invention.
优选的，计算不同灰阶下红色像素点对应的红色拖影距离的方法为：输入移动图像，所述移动图像的灰阶小于当前显示面板的灰阶；拍摄在图像移动过程中任一时刻的显示面板照片；分析获取显示面板上不同区域的灰阶值，其中，移动图像还未经过的区域的灰阶值等于移动图像已经经过的区域的灰阶值，为第一灰阶、移动图像所在区域的灰阶为第二灰阶，第二灰阶小于第一灰阶、拖影区域的灰阶为第三灰阶，所述第三灰阶大于第二灰阶且不等于第一灰阶；测量拖影区域沿图像移动方向的长度，该长度为拖影距离。Preferably, the method of calculating the red smear distance corresponding to the red pixels under different gray levels is: inputting a moving image whose gray level is smaller than the gray level of the current display panel; shooting at any moment in the image moving process Display panel photos; analyze and obtain the grayscale values of different areas on the display panel, where the grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale The gray scale of the area is the second gray scale, the second gray scale is smaller than the first gray scale, the gray scale of the smear area is the third gray scale, the third gray scale is greater than the second gray scale and is not equal to the first gray scale ; Measure the length of the smear area along the moving direction of the image, which is the smear distance.
优选的，计算不同灰阶下绿色像素点对应的绿色拖影距离的方法和计算不同灰阶下蓝色像素点对应的蓝色拖影距离的方法与计算不同灰阶下红色像素点对应的红色拖影距离的方法相同。Preferably, the method of calculating the green smear distance corresponding to the green pixels at different gray levels and the method of calculating the blue smear distance corresponding to the blue pixels at different gray levels and calculating the red corresponding to the red pixels at different gray levels The method of smearing distance is the same.
优选的，如图5所示，所述输入的移动图像为矩形，所述矩形的移动方向与显示面板的一条边平行。Preferably, as shown in FIG. 5, the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
优选的，在进行白平衡调整之前，还包括对显示面板进行gamma曲线调整。Preferably, before performing the white balance adjustment, it also includes adjusting the gamma curve of the display panel.
本发明首先对显示面板进行白平衡调整，之后点亮不同灰阶下不同像素点对应的纯色画面，计算出不同灰阶下不同像素点对应的红色拖影距离，并选取最小的拖影距离对应的灰阶信号中包含的过驱动电压作为不同像素点的过驱动电压，从而实现过驱动电压的手动调整，有效节约了成本，提高了效率。The present invention first adjusts the white balance of the display panel, then lights up the solid color images corresponding to different pixels under different gray levels, calculates the red smear distance corresponding to different pixels under different gray levels, and selects the smallest smear distance corresponding to The over-driving voltage contained in the gray-scale signal is used as the over-driving voltage of different pixels, so as to realize the manual adjustment of the over-driving voltage, which effectively saves costs and improves efficiency.
本发明还提供了一种自动调整过驱动电压的装置，包括：The invention also provides a device for automatically adjusting the overdrive voltage, including:
第一调整单元，用于对显示面板进行白平衡调整；The first adjustment unit is used to adjust the white balance of the display panel;
第一控制单元，用于点亮不同灰阶下红色像素点对应的纯色画面；The first control unit is used to light up the solid color pictures corresponding to the red pixels under different gray levels;
第一计算单元，用于计算不同灰阶下红色像素点对应的红色拖影距离；The first calculation unit is used to calculate the red smear distance corresponding to the red pixels under different gray levels;
第一比较单元，用于比较不同灰阶下红色像素点对应的红色拖影距离，选取最小的红色拖影距离对应的灰阶信号中包含的过驱动电压作为红色像素点的过驱动电压；The first comparison unit is used to compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage included in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
第二控制单元，点亮不同灰阶下绿色像素点对应的纯色画面；The second control unit to light up the solid color pictures corresponding to the green pixels under different gray levels;
第二计算单元，计算不同灰阶下绿色像素点对应的绿色拖影距离；The second calculation unit calculates the green smear distance corresponding to the green pixels at different gray levels;
第二比较单元，比较不同灰阶下绿色像素点对应的绿色拖影距离，选取最小的绿色拖影距离对应的灰阶信号中包含的过驱动电压作为绿色像素点的过驱动电压；The second comparison unit compares the green smear distances corresponding to the green pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest green smudge distance as the overdrive voltage of the green pixels;
第三控制单元，点亮不同灰阶下蓝色像素点对应的纯色画面；The third control unit, light up the solid color picture corresponding to the blue pixels under different gray levels;
第三计算单元，计算不同灰阶下蓝色像素点对应的蓝色拖影距离；The third calculation unit calculates the blue smear distance corresponding to the blue pixels under different gray levels;
第三比较单元，比较不同灰阶下蓝色像素点对应的蓝色拖影距离，选取最小的蓝色拖影距离对应的灰阶信号中包含的过驱动电压作为蓝色像素点的过驱动电压。The third comparison unit compares the blue smear distances corresponding to blue pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels .
优选的，所述第一计算单元包括：Preferably, the first calculation unit includes:
输入模块，用于输入移动图像，所述移动图像的灰阶小于当前显示面板的灰阶；The input module is used to input a moving image whose gray scale is smaller than that of the current display panel;
拍摄模块，用于拍摄在图像移动过程中任一时刻的显示面板照片；The shooting module is used to take photos of the display panel at any moment during the image movement;
分析模块，用于分析获取显示面板上不同区域的灰阶值，其中，移动图像还未经过的区域的灰阶值等于移动图像已经经过的区域的灰阶值，为第一灰阶、移动图像所在区域的灰阶为第二灰阶，第二灰阶小于第一灰阶、拖影区域的灰阶为第三灰阶，所述第三灰阶大于第二灰阶且不等于第一灰阶；The analysis module is used to analyze and obtain the grayscale values of different areas on the display panel, wherein the grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale The gray scale of the area is the second gray scale, the second gray scale is smaller than the first gray scale, the gray scale of the smear area is the third gray scale, the third gray scale is greater than the second gray scale and is not equal to the first gray scale Order
测量模块，用于测量拖影区域沿图像移动方向的长度，该长度为拖影距离。The measurement module is used to measure the length of the smear area along the moving direction of the image, and the length is the smear distance.
优选的，所述第二计算单元和第三计算单元与第一计算单元的结构相同。Preferably, the second computing unit and the third computing unit have the same structure as the first computing unit.
优选的，所述输入的移动图像为矩形，所述矩形的移动方向与显示面板的一条边平行。Preferably, the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
优选的，自动调整过驱动电压的装置还包括第二调整单元，用于对显示面板进行gamma曲线调整。Preferably, the device for automatically adjusting the overdrive voltage further includes a second adjusting unit, which is used to adjust the gamma curve of the display panel.
相应的，本发明还提供了一种显示面板，所述显示面板包括如前所述的自动调整过驱动电压的装置。Correspondingly, the present invention also provides a display panel including the device for automatically adjusting the overdrive voltage as described above.
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。In summary, although the present invention has been disclosed as above with preferred embodiments, the above-mentioned preferred embodiments are not intended to limit the present invention. Those of ordinary skill in the art can do various things without departing from the spirit and scope of the present invention. Kind of changes and retouching, so the protection scope of the present invention is subject to the scope defined by the claims.

Claims (15)

  1. 一种自动调整过驱动电压的方法，其包括以下步骤：A method for automatically adjusting overdrive voltage includes the following steps:
    对显示面板进行白平衡调整；Adjust the white balance of the display panel;
    点亮不同灰阶下红色像素点对应的纯色画面；Light up the solid color pictures corresponding to the red pixels under different gray levels;
    计算不同灰阶下红色像素点对应的红色拖影距离；Calculate the red smear distance corresponding to the red pixels under different gray levels;
    比较不同灰阶下红色像素点对应的红色拖影距离，选取最小的红色拖影距离对应的灰阶信号中包含的过驱动电压作为红色像素点的过驱动电压；Compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
    点亮不同灰阶下绿色像素点对应的纯色画面；Light up the solid color images corresponding to the green pixels at different gray levels;
    计算不同灰阶下绿色像素点对应的绿色拖影距离；Calculate the green smear distance corresponding to the green pixels at different gray levels;
    比较不同灰阶下绿色像素点对应的绿色拖影距离，选取最小的绿色拖影距离对应的灰阶信号中包含的过驱动电压作为绿色像素点的过驱动电压；Compare the green smear distance corresponding to the green pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest green smear distance as the overdrive voltage of the green pixels;
    点亮不同灰阶下蓝色像素点对应的纯色画面；Light up the solid color picture corresponding to the blue pixels under different gray levels;
    计算不同灰阶下蓝色像素点对应的蓝色拖影距离；Calculate the blue smear distance corresponding to blue pixels under different gray levels;
    比较不同灰阶下蓝色像素点对应的蓝色拖影距离，选取最小的蓝色拖影距离对应的灰阶信号中包含的过驱动电压作为蓝色像素点的过驱动电压。Compare the blue smear distances corresponding to the blue pixels under different gray levels, and select the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels.
  2. 根据权利要求1所述的自动调整过驱动电压的方法，其中，计算不同灰阶下红色像素点对应的红色拖影距离的方法为：The method for automatically adjusting an overdrive voltage according to claim 1, wherein the method for calculating the red smear distance corresponding to the red pixel points at different gray levels is:
    输入移动图像，所述移动图像的灰阶小于当前显示面板的灰阶；Enter a moving image whose gray scale is smaller than the gray scale of the current display panel;
    拍摄在图像移动过程中任一时刻的显示面板照片；Take a picture of the display panel at any moment during the movement of the image;
    分析获取显示面板上不同区域的灰阶值，其中，移动图像还未经过的区域的灰阶值等于移动图像已经经过的区域的灰阶值，为第一灰阶、移动图像所在区域的灰阶为第二灰阶，第二灰阶小于第一灰阶、拖影区域的灰阶为第三灰阶，所述第三灰阶大于第二灰阶且不等于第一灰阶；Analyze and obtain the grayscale values of different areas on the display panel, where the grayscale value of the area where the moving image has not passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale and the grayscale of the area where the mobile image is It is the second gray scale, the second gray scale is smaller than the first gray scale, and the gray scale of the smear area is the third gray scale, the third gray scale is larger than the second gray scale and not equal to the first gray scale;
    测量拖影区域沿图像移动方向的长度，该长度为拖影距离。Measure the length of the smear area along the moving direction of the image. This length is the smear distance.
  3. 根据权利要求2所述的自动调整过驱动电压的方法，其中，计算不同灰阶下绿色像素点对应的绿色拖影距离的方法和计算不同灰阶下蓝色像素点对应的蓝色拖影距离的方法与计算不同灰阶下红色像素点对应的红色拖影距离的方法相同。The method for automatically adjusting an overdrive voltage according to claim 2, wherein the method of calculating the green smear distance corresponding to the green pixels at different gray levels and the blue smear distance corresponding to the blue pixels at different gray levels The method is the same as the method of calculating the red smear distance corresponding to the red pixels under different gray levels.
  4. 根据权利要求2所述的自动调整过驱动电压的方法，其中，所述输入的移动图像为矩形，所述矩形的移动方向与显示面板的一条边平行。The method for automatically adjusting an overdrive voltage according to claim 2, wherein the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
  5. 根据权利要求1所述的自动调整过驱动电压的方法，其中，在进行白平衡调整之前，还包括：The method for automatically adjusting an overdrive voltage according to claim 1, wherein before performing the white balance adjustment, the method further comprises:
    对显示面板进行gamma曲线调整。Adjust the gamma curve of the display panel.
  6. 一种自动调整过驱动电压的装置，其包括：A device for automatically adjusting overdrive voltage includes:
    第一调整单元，用于对显示面板进行白平衡调整；The first adjustment unit is used to adjust the white balance of the display panel;
    第一控制单元，用于点亮不同灰阶下红色像素点对应的纯色画面；The first control unit is used to light up the solid color pictures corresponding to the red pixels under different gray levels;
    第一计算单元，用于计算不同灰阶下红色像素点对应的红色拖影距离；The first calculation unit is used to calculate the red smear distance corresponding to the red pixels under different gray levels;
    第一比较单元，用于比较不同灰阶下红色像素点对应的红色拖影距离，选取最小的红色拖影距离对应的灰阶信号中包含的过驱动电压作为红色像素点的过驱动电压；The first comparison unit is used to compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage included in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
    第二控制单元，点亮不同灰阶下绿色像素点对应的纯色画面；The second control unit to light up the solid color pictures corresponding to the green pixels under different gray levels;
    第二计算单元，计算不同灰阶下绿色像素点对应的绿色拖影距离；The second calculation unit calculates the green smear distance corresponding to the green pixels at different gray levels;
    第二比较单元，比较不同灰阶下绿色像素点对应的绿色拖影距离，选取最小的绿色拖影距离对应的灰阶信号中包含的过驱动电压作为绿色像素点的过驱动电压；The second comparison unit compares the green smear distances corresponding to the green pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest green smudge distance as the overdrive voltage of the green pixels;
    第三控制单元，点亮不同灰阶下蓝色像素点对应的纯色画面；The third control unit, light up the solid color picture corresponding to the blue pixels under different gray levels;
    第三计算单元，计算不同灰阶下蓝色像素点对应的蓝色拖影距离；The third calculation unit calculates the blue smear distance corresponding to the blue pixels under different gray levels;
    第三比较单元，比较不同灰阶下蓝色像素点对应的蓝色拖影距离，选取最小的蓝色拖影距离对应的灰阶信号中包含的过驱动电压作为蓝色像素点的过驱动电压。The third comparison unit compares the blue smear distances corresponding to blue pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels .
  7. 根据权利要求6所述的自动调整过驱动电压的装置，其中，第一计算单元包括：The apparatus for automatically adjusting an overdrive voltage according to claim 6, wherein the first calculation unit includes:
    输入模块，用于输入移动图像，所述移动图像的灰阶小于当前显示面板的灰阶；The input module is used to input a moving image whose gray scale is smaller than that of the current display panel;
    拍摄模块，用于拍摄在图像移动过程中任一时刻的显示面板照片；The shooting module is used to take photos of the display panel at any moment during the image movement;
    分析模块，用于分析获取显示面板上不同区域的灰阶值，其中，移动图像还未经过的区域的灰阶值等于移动图像已经经过的区域的灰阶值，为第一灰阶、移动图像所在区域的灰阶为第二灰阶，第二灰阶小于第一灰阶、拖影区域的灰阶为第三灰阶，所述第三灰阶大于第二灰阶且不等于第一灰阶；The analysis module is used to analyze and obtain the grayscale values of different areas on the display panel, wherein the grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale The gray scale of the area is the second gray scale, the second gray scale is smaller than the first gray scale, the gray scale of the smear area is the third gray scale, the third gray scale is greater than the second gray scale and is not equal to the first gray scale Order
    测量模块，用于测量拖影区域沿图像移动方向的长度，该长度为拖影距离。The measurement module is used to measure the length of the smear area along the moving direction of the image, and the length is the smear distance.
  8. 根据权利要求7所述的自动调整过驱动电压的装置，其中，所述第二计算单元和第三计算单元与第一计算单元的结构相同。The apparatus for automatically adjusting an overdrive voltage according to claim 7, wherein the second calculation unit and the third calculation unit have the same structure as the first calculation unit.
  9. 根据权利要求7所述的自动调整过驱动电压的装置，其中，所述输入的移动图像为矩形，所述矩形的移动方向与显示面板的一条边平行。The device for automatically adjusting an overdrive voltage according to claim 7, wherein the input moving image is a rectangle, and the moving direction of the rectangle is parallel to one side of the display panel.
  10. 根据权利要求6所述的自动调整过驱动电压的装置，其中，在进行白平衡调整之前，还包括：The device for automatically adjusting overdrive voltage according to claim 6, wherein, before performing the white balance adjustment, further comprising:
    第二调整单元，用于对显示面板进行gamma曲线调整。The second adjustment unit is used to adjust the gamma curve of the display panel.
  11. 一种显示面板，其包括一种自动调整过驱动电压的装置，所述装置包括：A display panel includes a device for automatically adjusting overdriving voltage. The device includes:
    第一调整单元，用于对显示面板进行白平衡调整；The first adjustment unit is used to adjust the white balance of the display panel;
    第一控制单元，用于点亮不同灰阶下红色像素点对应的纯色画面；The first control unit is used to light up the solid color pictures corresponding to the red pixels under different gray levels;
    第一计算单元，用于计算不同灰阶下红色像素点对应的红色拖影距离；The first calculation unit is used to calculate the red smear distance corresponding to the red pixels under different gray levels;
    第一比较单元，用于比较不同灰阶下红色像素点对应的红色拖影距离，选取最小的红色拖影距离对应的灰阶信号中包含的过驱动电压作为红色像素点的过驱动电压；The first comparison unit is used to compare the red smear distances corresponding to the red pixels under different gray levels, and select the overdrive voltage included in the grayscale signal corresponding to the smallest red smear distance as the overdrive voltage of the red pixels;
    第二控制单元，点亮不同灰阶下绿色像素点对应的纯色画面；The second control unit to light up the solid color pictures corresponding to the green pixels under different gray levels;
    第二计算单元，计算不同灰阶下绿色像素点对应的绿色拖影距离；The second calculation unit calculates the green smear distance corresponding to the green pixels at different gray levels;
    第二比较单元，比较不同灰阶下绿色像素点对应的绿色拖影距离，选取最小的绿色拖影距离对应的灰阶信号中包含的过驱动电压作为绿色像素点的过驱动电压；The second comparison unit compares the green smear distances corresponding to the green pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest green smudge distance as the overdrive voltage of the green pixels;
    第三控制单元，点亮不同灰阶下蓝色像素点对应的纯色画面；The third control unit, light up the solid color picture corresponding to the blue pixels under different gray levels;
    第三计算单元，计算不同灰阶下蓝色像素点对应的蓝色拖影距离；The third calculation unit calculates the blue smear distance corresponding to the blue pixels under different gray levels;
    第三比较单元，比较不同灰阶下蓝色像素点对应的蓝色拖影距离，选取最小的蓝色拖影距离对应的灰阶信号中包含的过驱动电压作为蓝色像素点的过驱动电压。The third comparison unit compares the blue smear distances corresponding to blue pixels under different gray levels, and selects the overdrive voltage contained in the grayscale signal corresponding to the smallest blue smear distance as the overdrive voltage of the blue pixels .
  12. 根据权利要求11所述的显示面板，其中，第一计算单元包括：The display panel according to claim 11, wherein the first calculation unit comprises:
    输入模块，用于输入移动图像，所述移动图像的灰阶小于当前显示面板的灰阶；The input module is used to input a moving image whose gray scale is smaller than that of the current display panel;
    拍摄模块，用于拍摄在图像移动过程中任一时刻的显示面板照片；The shooting module is used to take photos of the display panel at any moment during the image movement;
    分析模块，用于分析获取显示面板上不同区域的灰阶值，其中，移动图像还未经过的区域的灰阶值等于移动图像已经经过的区域的灰阶值，为第一灰阶、移动图像所在区域的灰阶为第二灰阶，第二灰阶小于第一灰阶、拖影区域的灰阶为第三灰阶，所述第三灰阶大于第二灰阶且不等于第一灰阶；The analysis module is used to analyze and obtain the grayscale values of different areas on the display panel, wherein the grayscale value of the area where the moving image has not yet passed is equal to the grayscale value of the area where the moving image has passed, which is the first grayscale The gray scale of the area is the second gray scale, the second gray scale is smaller than the first gray scale, the gray scale of the smear area is the third gray scale, the third gray scale is greater than the second gray scale and is not equal to the first gray scale Order
    测量模块，用于测量拖影区域沿图像移动方向的长度，该长度为拖影距离。The measurement module is used to measure the length of the smear area along the moving direction of the image, and the length is the smear distance.
  13. 根据权利要求1所述的显示面板，其中，所述第二计算单元和第三计算单元与第一计算单元的结构相同。The display panel according to claim 1, wherein the second calculation unit and the third calculation unit have the same structure as the first calculation unit.
  14. 根据权利要求11所述的显示面板，其中，所述输入的移动图像为矩形，所述矩形的移动方向与显示面板的一条边平行。The display panel according to claim 11, wherein the input moving image is a rectangle whose moving direction is parallel to one side of the display panel.
  15. 根据权利要求11所述的显示面板，其中，在进行白平衡调整之前，还包括：The display panel according to claim 11, wherein, before performing the white balance adjustment, further comprising:
    第二调整单元，用于对显示面板进行gamma曲线调整。The second adjustment unit is used to adjust the gamma curve of the display panel.
PCT/CN2019/070043 2018-10-12 2019-01-02 Method and apparatus for automatically adjusting overdrive voltage, and display panel WO2020073545A1 (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101256748A (en) * 2007-02-28 2008-09-03 乐金显示有限公司 Apparatus for automatically setting over-driving look-up table for liquid crystal display device and control method thereof
TW200839703A (en) * 2007-03-27 2008-10-01 R2D Technology Inc System and method for adjusting overdrive voltages of an LCD
JP2009223259A (en) * 2008-03-19 2009-10-01 Seiko Epson Corp Liquid crystal driving device, and liquid crystal device and method of driving the same
CN101582245A (en) * 2008-05-13 2009-11-18 奇美电子股份有限公司 Liquid crystal panel overdriving circuit, driving method and liquid crystal display
US20090295827A1 (en) * 2008-05-28 2009-12-03 Canon Kabushiki Kaisha Display control apparatus and method of determining driving parameter for overdrive
CN101739965A (en) * 2008-11-07 2010-06-16 奇美电子股份有限公司 Driving method of liquid crystal panel and liquid crystal display
CN102456313A (en) * 2010-10-19 2012-05-16 奇美电子股份有限公司 Overdrive device and overdrive value generating method
CN102509531A (en) * 2011-11-21 2012-06-20 深圳市华星光电技术有限公司 Method and device for measuring streaks of display device
CN107918217A (en) * 2018-01-03 2018-04-17 京东方科技集团股份有限公司 The test method and test device of response time

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0519257A (en) * 1991-07-15 1993-01-29 Japan Aviation Electron Ind Ltd Color liquid crystal display device
CN101727815B (en) * 2009-12-23 2012-04-25 华映光电股份有限公司 Local black insertion method for dynamic image and display device
CN104318893B (en) * 2014-09-29 2019-02-22 青岛海信电器股份有限公司 A kind of method and system for eliminating still image display area ghost defect
CN106652939B (en) * 2016-12-20 2018-11-23 武汉华星光电技术有限公司 A kind of driving method and driving device of display panel
CN108574794B (en) * 2018-03-30 2021-01-22 京东方科技集团股份有限公司 Image processing method and device, display equipment and computer readable storage medium
CN108470540B (en) * 2018-06-21 2020-05-15 京东方科技集团股份有限公司 Display panel, driving method thereof and display device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101256748A (en) * 2007-02-28 2008-09-03 乐金显示有限公司 Apparatus for automatically setting over-driving look-up table for liquid crystal display device and control method thereof
TW200839703A (en) * 2007-03-27 2008-10-01 R2D Technology Inc System and method for adjusting overdrive voltages of an LCD
JP2009223259A (en) * 2008-03-19 2009-10-01 Seiko Epson Corp Liquid crystal driving device, and liquid crystal device and method of driving the same
CN101582245A (en) * 2008-05-13 2009-11-18 奇美电子股份有限公司 Liquid crystal panel overdriving circuit, driving method and liquid crystal display
US20090295827A1 (en) * 2008-05-28 2009-12-03 Canon Kabushiki Kaisha Display control apparatus and method of determining driving parameter for overdrive
CN101739965A (en) * 2008-11-07 2010-06-16 奇美电子股份有限公司 Driving method of liquid crystal panel and liquid crystal display
CN102456313A (en) * 2010-10-19 2012-05-16 奇美电子股份有限公司 Overdrive device and overdrive value generating method
CN102509531A (en) * 2011-11-21 2012-06-20 深圳市华星光电技术有限公司 Method and device for measuring streaks of display device
CN107918217A (en) * 2018-01-03 2018-04-17 京东方科技集团股份有限公司 The test method and test device of response time

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