WO2020087556A1 - 一种快速寻找显示面板的公共电压的方法及测试机台 - Google Patents

一种快速寻找显示面板的公共电压的方法及测试机台 Download PDF

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WO2020087556A1
WO2020087556A1 PCT/CN2018/114478 CN2018114478W WO2020087556A1 WO 2020087556 A1 WO2020087556 A1 WO 2020087556A1 CN 2018114478 W CN2018114478 W CN 2018114478W WO 2020087556 A1 WO2020087556 A1 WO 2020087556A1
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common voltage
display panel
flicker
value
power conversion
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PCT/CN2018/114478
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English (en)
French (fr)
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李嘉航
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重庆先进光电显示技术研究院
重庆惠科金渝光电科技有限公司
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Priority to US16/463,372 priority Critical patent/US10891885B2/en
Publication of WO2020087556A1 publication Critical patent/WO2020087556A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—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
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Definitions

  • the present application relates to the field of display technology, and more specifically, to a method and test machine for quickly finding the common voltage of a display panel.
  • the stability of the display effect is crucial, and flicker is a phenomenon that seriously affects the display quality.
  • LCD liquid crystal display panel
  • Vcom common voltage
  • the minimum flicker value is found, the corresponding Vcom voltage is determined as the most Good value, point-by-point voltage search method also takes a lot of time to search for the best voltage. Therefore, how to determine the optimal value of the common voltage Vcom faster and reduce the time to find the optimal Vcom voltage becomes an important issue.
  • the purpose of this application is to provide a method and test machine for quickly finding the common voltage of a display panel to solve the problem of spending more time to find the optimal common voltage value of the display panel.
  • this application provides a method for quickly finding the common voltage of a display panel, including the following steps:
  • Measurement steps measure the flicker value of the display panel under any at least three different common voltage values
  • Conversion step Perform power-to-power conversion of the above-mentioned at least three flicker values to the power of 2.5, and perform unary quadratic function fitting on the converted flicker value and the corresponding common voltage;
  • Acquisition step Obtain the common voltage value corresponding to the vertex of the unary quadratic function as the common voltage of the display panel.
  • a conversion to the power of 2.5 is performed.
  • power conversion of 2-4 is performed.
  • step A is performed again.
  • the conversion step if the fitting effect of the unary quadratic function is not good, select a different power value to perform the power conversion again, and perform the conversion step again.
  • this application also provides a common voltage testing machine for display panels, including:
  • the flicker value measuring instrument measures the flicker value of the display panel to be tested
  • the power conversion component is connected to the flicker value measuring instrument signal to convert the flicker value measured by the flicker value measuring instrument to the power;
  • Fit the calculation component perform a one-degree quadratic function fitting on the flicker value generated by the power conversion component and the corresponding common voltage, and output the common voltage value corresponding to the vertex of the one-degree quadratic function as the common display panel Voltage.
  • the power conversion component converts the flicker value measured by the flicker value measuring instrument to the power of 2.5.
  • the common voltage testing machine of the display panel further includes a common voltage programming component, which is electrically connected to the gamma control circuit of the display panel to be tested to burn the common voltage value output by the fitting calculation component Recorded into the gamma control circuit of the display panel to be tested.
  • a common voltage programming component which is electrically connected to the gamma control circuit of the display panel to be tested to burn the common voltage value output by the fitting calculation component Recorded into the gamma control circuit of the display panel to be tested.
  • the flicker measuring instrument is a color analyzer or a high-speed brightness meter.
  • the method for quickly finding the common voltage of the display panel described in this application only measures the flicker value of the display panel at any at least three different common voltage values.
  • the best common voltage value simplifies the workflow to the greatest extent and shortens the time to find the best common voltage value.
  • the common voltage testing machine of the display panel described in this application is provided with a flicker value measuring instrument, a power conversion component and a fitting calculation component, the measured flicker value is converted to the power, and the conversion
  • the value of the flicker value and the corresponding public voltage are fitted with a quadratic function of one element.
  • the common voltage value corresponding to the vertex of the quadratic function of one element is quickly found to be the best common voltage value of the display panel. To a certain extent, it simplifies the work process and shortens the time to find the best common voltage value.
  • FIG. 1 is a schematic diagram of steps of a method for quickly finding a common voltage of a display panel according to one embodiment of this application;
  • Vcom-Flicker curve corresponding to a discrete flicker value (Flicker value) of a display panel driven by different Vcom voltages in one embodiment of the present application
  • Fig. 3 is the numerical value points obtained by performing the power conversion of the discrete flicker value in Fig. 2 to 2.5 times;
  • FIG. 4 is a quadratic curve obtained by fitting a mathematical function to each numerical point in FIG. 3;
  • FIG. 5 is a schematic diagram of steps of a method for quickly finding a common voltage of a display panel according to one embodiment of the present application
  • FIG. 6 is a schematic diagram of steps of a method for quickly finding a common voltage of a display panel according to one embodiment of this application;
  • FIG. 7 is a schematic structural diagram of a public voltage testing machine according to one embodiment of the present application.
  • FIG. 8 is a schematic diagram of the brightness change of the display panel before the adjustment of the common voltage Vcom;
  • FIG. 9 is a schematic diagram of the brightness change of the display panel after the adjustment of the common voltage Vcom.
  • connection should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • installation should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • a method for quickly finding the common voltage of a display panel including the following steps:
  • Measurement Step A Measure the flicker value of the display panel under any at least three different common voltage values
  • Conversion step B Perform power-of-power conversion on the at least three flicker values, and perform a unary quadratic function fitting on the converted flicker value and the corresponding common voltage;
  • Acquisition step C Obtain the common voltage value corresponding to the vertex of the unary quadratic function as the common voltage of the display panel.
  • the method for quickly finding the common voltage of the display panel described in this application only measures the flicker value of the display panel at any at least three different common voltage values.
  • the best common voltage value simplifies the workflow to the greatest extent and shortens the time to find the best common voltage value.
  • the vertex of the quadratic function of one yuan can be quickly found through the mathematical formula; the common voltage value corresponding to the vertex is The best common voltage value of the display panel realizes the measurement with less common voltage, and even only needs to measure the flicker value under at least three different common voltages to quickly determine the best common voltage Vcom voltage, the maximum To a certain extent, it simplifies the work process and shortens the time to find the best common voltage value.
  • the power value of the power conversion can be other settings than 2.5, such as 2, 3, 4 and so on.
  • a method for quickly finding the common voltage of a display panel including the following steps:
  • Measurement Step A Measure the flicker value of the display panel under any at least three different common voltage values
  • Conversion step B Perform power-of-power conversion on the at least three flicker values, and perform a unary quadratic function fitting on the converted flicker value and the corresponding common voltage;
  • Conversion step B1 Detecting the fitting effect of the unary quadratic function, if the preset conditions are met, perform step acquisition step C; if the preset conditions are not met, the fitting effect of the unary quadratic function is considered to be bad, and reselect at least three different To measure the flicker value of the common voltage value, then perform step measurement step A again;
  • Acquisition step C Obtain the common voltage value corresponding to the vertex of the unary quadratic function as the common voltage of the display panel.
  • a method for quickly finding the common voltage of a display panel including the following steps:
  • Measurement Step A Measure the flicker value of the display panel under any at least three different common voltage values
  • Conversion step B Perform power-of-power conversion on the at least three flicker values, and perform a unary quadratic function fitting on the converted flicker value and the corresponding common voltage;
  • Conversion step B2 Detect the fitting effect of the unary quadratic function, if the preset conditions are met, proceed to step C; if the preset conditions are not met, the fitting effect of the unary quadratic function is considered to be bad, and choose a different power Square values are re-powered and converted to step B again;
  • Acquisition step C Obtain the common voltage value corresponding to the vertex of the unary quadratic function as the common voltage of the display panel.
  • a conversion to the power of 2.5 is performed.
  • power conversion of 2-4 is performed.
  • the power value selects the interval of 2-4th power, and the fitting accuracy of the unary quadratic function generated by the fitting is higher, which is more conducive to vertex calculation.
  • step A is performed again.
  • a common voltage testing machine 100 for a display panel including:
  • the flicker value measuring instrument 101 measures the flicker value of the display panel 200 to be tested; the flicker measuring instrument 101 can be selected as a color analyzer or a high-speed brightness meter;
  • the power conversion component 102 is connected to the flicker value measuring instrument 101 to convert the flicker value measured by the flicker value measuring instrument 101 to the power; wherein, the power conversion component 102 preferably converts the flicker value The flicker value measured by the measuring instrument 101 is converted to the power of 2.5;
  • the fitting calculation component 103 performs a unary quadratic function fitting on the flicker value generated by the power conversion component 102 and the corresponding common voltage, and outputs the common voltage value corresponding to the vertex of the unary quadratic function as the display panel to be tested 200 common voltage.
  • the common voltage testing machine 100 of the display panel further includes a common voltage programming component 104 electrically connected to the gamma control circuit 201 of the display panel to be tested 200 to calculate the fit
  • the common voltage value output by the component is burned into the gamma control circuit of the display panel to be tested.
  • Such a design burns the best common voltage directly into the gamma control circuit, and the burn is completed directly in one time, and the degree of automation is better.
  • the common voltage testing machine 100 of the display panel is provided with a flicker value measuring instrument 101, a power conversion component 102, and a fitting calculation component 103, the measured flicker value is raised to the power Conversion, the converted flicker value and the corresponding public voltage will be fitted with a quadratic function of the unary, using the characteristics of the unary quadratic function, quickly find the common voltage value corresponding to the vertex of the unary quadratic function is the best display panel
  • the common voltage value simplifies the working process to the greatest extent and shortens the time to find the best common voltage value.
  • the difference between the positive and negative pixel voltages of the display panel and the Vcom voltage is inconsistent, and the display period is 30 Hz.
  • the brightness of the display panel is different, the brightness changes significantly, and the flicker is obvious;
  • the positive and negative pixel voltages of the display panel The difference between the voltage and Vcom voltage is almost the same, with 30Hz as the display period, there is no obvious difference in the brightness of the display panel during the display period, and the flicker is significantly improved.
  • the panel of this application can be a TN panel (full name Twisted Nematic, namely twisted nematic panel), IPS panel (In-Plane Switching, plane switching), VA panel (Multi-domain Vertica Alignment, multi-quadrant vertical alignment technology), Of course, other types of panels can also be used.
  • TN panel full name Twisted Nematic, namely twisted nematic panel
  • IPS panel In-Plane Switching, plane switching
  • VA panel Multi-domain Vertica Alignment, multi-quadrant vertical alignment technology

Abstract

本申请公开了一种快速寻找显示面板的公共电压的方法及测试机台。包括量测显示面板的闪烁值(A)；对闪烁值进行幂次方转换，并对转换后的闪烁值与对应的公共电压进行一元二次函数拟合(B)；获取公共电压值作为公共电压(C)。

Description

一种快速寻找显示面板的公共电压的方法及测试机台
本申请要求于2018年10月30日提交中国专利局、申请号为CN201811275555.1、发明名称为“一种快速寻找显示面板的公共电压的方法及测试机台”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，更具体的说，涉及一种快速寻找显示面板的公共电压的方法及测试机台。
背景技术
这里的陈述仅提供与本申请有关的技术背景，而不必然地构成现有技术。
随着显示器的应用日益广泛，现今社会对显示器的需求日益广泛，包含手机，监视器，笔记本电脑，Pad，电视，甚至一些智能手表的应用，无不使用显示面板。
对于任何一台显示面板而言，显示效果的稳定性是至关重要的，其中闪烁是严重影响显示品质的一种现象，由于液晶显示面板(LCD，Liquid Crystal Display)需使用非完全对称的正负极性的像素电压带来亮度上的周期性高低变化，而和像素电压对侧形成电场的公共电压Vcom的大小，当公共电压Vcom取值不佳时，就会直接影响面部的显示效果，引起闪烁，这不仅会影响人们的观影感受，同时会降低产品的使用寿命。
申请人知晓查找最佳Vcom电压的办法主要是对于每一块LCD面板，用人工测量的办法逐一改变Vcom电压后进行检测，逐点电压搜寻，直到找到最小闪烁值时，确定对应的Vcom电压为最佳值，逐点电压搜寻方式也花费许多时间进行最佳电压的搜索。因此，如何更快的确定公共电压Vcom的最佳值，降低寻找最佳Vcom电压的时间，成为一个重要的问题。
技术解决方案
本申请的目的在于提供一种快速寻找显示面板的公共电压的方法及测 试机台，以解决花较多时间寻找显示面板的最佳公共电压值的问题。
为实现本申请的目的，本申请提供了一种快速寻找显示面板的公共电压的方法，包括以下步骤：
量测步骤：量测显示面板在任意至少三个不同公共电压值下的闪烁值；
转换步骤：对上述至少三个闪烁值进行2.5次方的幂次方转换，并对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合；
获取步骤：获取一元二次函数的顶点对应的公共电压值，作为显示面板的公共电压。
可选的，所述转换步骤对至少三个闪烁值进行幂次方转换的步骤中，进行的是2.5次方的转换。
可选的，所述转换步骤对至少三个闪烁值进行幂次方转换的步骤中，进行的是2-4的幂次方的转换。
可选的，所述转换步骤之后，若一元二次函数拟合效果不好，重新选择至少三个不同的公共电压值进行闪烁值的量测，再次进行步骤A。
可选的，所述转换步骤之后，若一元二次函数拟合效果不好，选择一个不同的幂次方数值重新进行幂次方转换，再次进行转换步骤。
为实现本申请的目的，本申请还提供了一种显示面板的公共电压测试机台，包括：
闪烁值量测仪，量测待测显示面板的闪烁值；
幂次方转换组件，与闪烁值量测仪信号连接，将闪烁值量测仪量测到的闪烁值进行幂次方转换；
拟合计算组件，对幂次方转换组件生成的闪烁值数值与对应的公共电压进行一元二次函数拟合，并输出一元二次函数的顶点对应的公共电压值，作为待测显示面板的公共电压。
可选的，所述幂次方转换组件，将闪烁值量测仪量测到的闪烁值进行2.5次方的幂次方转换。
可选的，所述显示面板的公共电压测试机台还包括公共电压烧录组件，与所述对待测显示面板的伽马控制电路电性连接，以将拟合计算组件输出的公共电压值烧录到待测显示面板的伽马控制电路中。
可选的，所述闪烁地量测仪为色彩分析仪或高速亮度计。
本申请所述的快速寻找显示面板公共电压的方法由于仅量测显示面板在任意至少三个不同公共电压值下的闪烁值，通过对上述至少三个闪烁值进行幂次方转换，将对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合，利用一元二次函数的特性，可以迅速通过数学公式找到一元二次函数的顶点；顶点对应的公共电压值即为显示面板的最佳公共电压值，最大程度上简化了工作流程、缩短了寻找最佳公共电压值的时间。
而本申请所述的显示面板的公共电压测试机台由于设置了闪烁值量测仪、幂次方转换组件和拟合计算组件，对量测到的闪烁值进行幂次方转换，将对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合，利用一元二次函数的特性，迅速找到一元二次函数顶点对应的公共电压值即为显示面板的最佳公共电压值，最大程度上简化了工作流程、缩短了寻找最佳公共电压值的时间。
附图说明
所包括的附图用来提供对本申请实施例的的理解，其构成了说明书的一部分，例示本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是本申请的其中一个实施例的快速寻找显示面板的公共电压的方法步骤示意图；
图2是本申请的其中一个实施例中以不同Vcom电压驱动量测对应显示面板的离散的闪烁值(Flicker值)对应制作的Vcom-Flicker曲线；
图3是对图2中离散的闪烁值进行2.5次的幂次方转换后得到的各数值点；
图4是对图3中的各数值点进行数学函数拟合后得到的一元二次曲线；
图5是本申请的其中一个实施例的快速寻找显示面板的公共电压的方法步骤示意图；
图6是本申请的其中一个实施例的快速寻找显示面板的公共电压的方法 步骤示意图；
图7是本申请的其中一个实施例的公共电压测试机台的结构示意图；
图8是公共电压Vcom调整前的显示面板的亮度变化示意图；
图9是公共电压Vcom调整后的显示面板的亮度变化示意图。
本申请的实施方式
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。
在本申请的描述中，需要理解的是，术语“中心”、“横向”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。另外，术语“包括”及其任何变形，意图在于覆盖不排他的包含。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
这里所使用的术语仅仅是为了描述具体实施例而不意图限制示例性实施例。除非上下文明确地另有所指，否则这里所使用的单数形式“一个”、“一项”还意图包括复数。还应当理解的是，这里所使用的术语“包括”和/或“包含”规定所陈述的特征、整数、步骤、操作、单元和/或组件的存在，而不排除存在或添加一个或更多其他特征、整数、步骤、操作、单元、组件 和/或其组合。
在图中，结构相似的单元是以相同标号表示。
通过测量、整合大量实验数据，发现了公共电压Vcom电压对应的闪烁值Flicker值的存在多项拟合规律。
如图1所示，在本申请的一实施例中，公开了一种快速寻找显示面板的公共电压的方法，包括以下步骤：
量测步骤A：量测显示面板在任意至少三个不同公共电压值下的闪烁值；
转换步骤B：对上述至少三个闪烁值进行幂次方转换，并对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合；
获取步骤C：获取一元二次函数的顶点对应的公共电压值，作为显示面板的公共电压。
本申请所述的快速寻找显示面板公共电压的方法由于仅量测显示面板在任意至少三个不同公共电压值下的闪烁值，通过对上述至少三个闪烁值进行幂次方转换，将对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合，利用一元二次函数的特性，可以迅速通过数学公式找到一元二次函数的顶点；顶点对应的公共电压值即为显示面板的最佳公共电压值，最大程度上简化了工作流程、缩短了寻找最佳公共电压值的时间。
下面以127灰阶下的一具体实例对上述快速寻找显示面板公共电压的方法原理进行说明：
申请人发现，在127灰阶下根据不同Vcom电压驱动后，量测对应显示面板的离散的闪烁值(Flicker值)，不同的面板均存在如图2所示的Vcom-Flicker曲线；
而将上述Vcom-Flicker曲线中离散的Flicker值进行2.5次的幂次方转换后，可得到如图3中所示的各数值点；经数学函数拟合分析，进行了2.5次幂转换后的闪烁值Flicker值与对应的公共电压值Vcom电压存在一元二次的曲线关系，即如图4中所示曲线。将对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合，利用一元二次函数的特性，可以迅速通过数学公式找到一元二次函数的顶点；顶点对应的公共电压值即为显示面板的最佳公共电压值，实现了用较少公共电压的量测，甚至只需对至少三个不同公 共电压下的闪烁值进行量测，即可快速确定最佳公共电压Vcom电压，最大程度上简化了工作流程、缩短了寻找最佳公共电压值的时间。
当然，进行幂次方转换的幂次方值可以为2.5之外的其它设置，如2、3、4等。申请人经过多次试验发现，对至少三个闪烁值进行2-4次方的转换后，拟合生成的一元二次函数图像拟合精度最高，最有利于顶点计算。
如图5所示，在本申请另一个实施例中，公开了一种快速寻找显示面板的公共电压的方法，包括以下步骤：
量测步骤A：量测显示面板在任意至少三个不同公共电压值下的闪烁值；
转换步骤B：对上述至少三个闪烁值进行幂次方转换，并对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合；
转换步骤B1：检测一元二次函数拟合效果，若满足预设条件，则执行步骤获取步骤C；若不满足预设条件，认为一元二次函数拟合效果不好，重新选择至少三个不同的公共电压值进行闪烁值的量测再次进行步骤量测步骤A；
获取步骤C：获取一元二次函数的顶点对应的公共电压值，作为显示面板的公共电压。
这样的设计有助于自动化检测的实施，若因量测步骤A中前一次选择的公共电压值不佳导致转换步骤B中一元二次函数拟合效果不好，则再次进行至少三个不同的公共电压值进行闪烁值的量测，直至符合一元二次函数拟合条件。
如图6所示，在本申请又一实施例中，公开了一种快速寻找显示面板的公共电压的方法，包括以下步骤：
量测步骤A：量测显示面板在任意至少三个不同公共电压值下的闪烁值；
转换步骤B：对上述至少三个闪烁值进行幂次方转换，并对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合；
转换步骤B2：检测一元二次函数拟合效果，若满足预设条件，则执行步骤获取步骤C；若不满足预设条件，认为一元二次函数拟合效果不好，选择一个不同的幂次方数值重新进行幂次方转换，再次进行转换步骤B；
获取步骤C：获取一元二次函数的顶点对应的公共电压值，作为显示面板的公共电压。
这样的设计有助于自动化检测的实施，若因转换步骤B中幂次方数值选择不佳导致转换步骤B中一元二次函数拟合效果不好，则再次选择一个不同的幂次方数值重新进行幂次方转换，直至符合一元二次函数拟合条件。
在一实施例中，所述转换步骤B对至少三个闪烁值进行幂次方转换的步骤中，进行的是2.5次方的转换。
本方案中，对至少三个闪烁值进行2.5次方的转换后，拟合生成的一元二次函数图像拟合精度最高，最有利于顶点计算。
在一实施例中，所述转换步骤B对至少三个闪烁值进行幂次方转换的步骤中，进行的是2-4的幂次方的转换。
本方案中，幂值选择2-4次方的区间，拟合生成的一元二次函数图像拟合精度较高，较有利于顶点计算。
在一实施例中，所述转换步骤B之后，若一元二次函数拟合效果不好，重新选择至少三个不同的公共电压值进行闪烁值的量测，再次进行步骤A。
本方案中，这样的设计有助于自动化检测的实施，若因量测步骤A中前一次选择的公共电压值不佳导致转换步骤B中一元二次函数拟合效果不好，则再次进行至少三个不同的公共电压值进行闪烁值的量测，直至符合一元二次函数拟合条件。
在一实施例中，述转换步骤B之后，若一元二次函数拟合效果不好，选择一个不同的幂次方数值重新进行幂次方转换，再次进行转换步骤B。
本方案中，这样的设计有助于自动化检测的实施，若因转换步骤B中幂次方数值选择不佳导致转换步骤B中一元二次函数拟合效果不好，则再次选择一个不同的幂次方数值重新进行幂次方转换，直至符合一元二次函数拟合条件。
如图7所示，在本申请又一实施例中，还公开了一种显示面板的公共电压测试机台100，包括：
闪烁值量测仪101，量测待测显示面板200的闪烁值；所述闪烁地量测仪101可选用为色彩分析仪或高速亮度计；
幂次方转换组件102，与闪烁值量测仪101信号连接，将闪烁值量测仪101量测到的闪烁值进行幂次方转换；其中，所述幂次方转换组件102优选 将闪烁值量测仪101量测到的闪烁值进行2.5次方的幂次方转换；
拟合计算组件103，对幂次方转换组件102生成的闪烁值数值与对应的公共电压进行一元二次函数拟合，并输出一元二次函数的顶点对应的公共电压值，作为待测显示面板200的公共电压。
在一实施例中，所述的显示面板的公共电压测试机台100还包括公共电压烧录组件104，与所述对待测显示面板200的伽马控制电路201电性连接，以将拟合计算组件输出的公共电压值烧录到待测显示面板的伽马控制电路中。这样的设计将最佳公共电压直接烧录到伽马控制电路中，直接一次烧录完成，自动化程度更好。
本申请实施例所述的显示面板的公共电压测试机台100由于设置了闪烁值量测仪101、幂次方转换组件102和拟合计算组件103，对量测到的闪烁值进行幂次方转换，将对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合，利用一元二次函数的特性，迅速找到一元二次函数顶点对应的公共电压值即为显示面板的最佳公共电压值，最大程度上简化了工作流程、缩短了寻找最佳公共电压值的时间。
现针对最佳公共电压Vcom调整前后的闪烁效果进行验证：
如图8所示，在Vcom调整前，显示面板正负极性像素电压和Vcom电压的差值不一致，以30Hz为显示周期，显示周期内显示面板的亮度有差异，亮度变化明显，闪烁明显；而在找到一元二次函数的顶点对应的公共电压值作为最佳公共电压值并写入待测显示面板200的伽马控制电路201后，如图9所示，显示面板正负极性像素电压和Vcom电压的差值几乎一致，以30Hz为显示周期，显示周期内显示面板的亮度无明显差异，闪烁明显改善。
本申请的面板可以是TN面板(全称为Twisted Nematic，即扭曲向列型面板)、IPS面板(In-Plane Switching，平面转换)、VA面板(Multi-domain Vertica Alignment，多象限垂直配向技术)，当然，也可以是其他类型的面板，适用即可。
以上内容是结合具体的优选实施方式对本申请所作的详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替 换，都应当视为属于本申请的保护范围。

Claims (18)

  1. 一种快速寻找显示面板的公共电压的方法，包括以下步骤：
    量测显示面板在任意至少三个不同公共电压值下的闪烁值；
    对上述至少三个闪烁值进行幂次方转换，并对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合；以及
    获取一元二次函数的顶点对应的公共电压值，作为显示面板的公共电压。
  2. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中，所述对至少三个闪烁值进行幂次方转换的步骤中，进行的是2.5次方的转换。
  3. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中，所述对至少三个闪烁值进行幂次方转换的步骤中，进行的是2-4的幂次方的转换。
  4. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中，所述对至少三个闪烁值进行幂次方转换的步骤中，进行的是3的幂次方的转换。
  5. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中，所述对上述至少三个闪烁值进行幂次方转换，并对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合的步骤之后，若一元二次函数拟合效果不好，再次进行量测显示面板在任意至少三个不同公共电压值下的闪烁值的步骤，重新选择至少三个不同的公共电压值进行闪烁值的量测。
  6. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中，所述对上述至少三个闪烁值进行幂次方转换，并对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合的步骤之后，若一元二次函数拟合效果不好，再次进行对上述至少三个闪烁值进行幂次方转换的步骤，并选择一个不同的幂次方数值重新进行幂次方转换。
  7. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中，所述量测显示面板在任意至少三个不同公共电压值下的闪烁值的步骤中，仅量测三个不同的公共电压值下的闪烁值。
  8. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中，所述量测显示面板在任意至少三个不同公共电压值下的闪烁值的步骤中，量测4个或5个不同的公共电压值下的闪烁值。
  9. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中， 所述获取一元二次函数的顶点对应的公共电压值，作为显示面板的公共电压的步骤中，包括将获取到的公共电压值烧录到显示面板的伽马控制电路中的步骤。
  10. 如权利要求1所述的一种快速寻找显示面板的公共电压的方法，其中，所述快速寻找显示面板的公共电压的方法还包括使用获取到的公共电压值对调整后的闪烁效果进行验证的步骤。
  11. 一种快速寻找显示面板的公共电压的方法，包括以下步骤：
    量测显示面板在任意至少三个不同公共电压值下的闪烁值；
    对上述至少三个闪烁值进行2.5次方的幂次方转换，并对转换后的闪烁值数值与对应的公共电压进行一元二次函数拟合；以及
    获取一元二次函数的顶点对应的公共电压值，作为显示面板的公共电压。
  12. 一种显示面板的公共电压测试机台，所述公共电压测试机台包括：
    闪烁值量测仪，量测待测显示面板的闪烁值；
    幂次方转换组件，与闪烁值量测仪信号连接，将闪烁值量测仪量测到的至少三个闪烁值进行幂次方转换；以及
    拟合计算组件，对幂次方转换组件生成的闪烁值数值与对应的公共电压进行一元二次函数拟合，并输出一元二次函数的顶点对应的公共电压值，作为待测显示面板的公共电压。
  13. 如权利要求12所述的一种显示面板的公共电压测试机台，其中，所述幂次方转换组件，将闪烁值量测仪量测到的闪烁值进行2.5次方的幂次方转换。
  14. 如权利要求12所述的一种显示面板的公共电压测试机台，其中，所述幂次方转换组件，将闪烁值量测仪量测到的闪烁值进行3次方的幂次方转换。
  15. 如权利要求12所述的一种显示面板的公共电压测试机台，其中，所述的显示面板的公共电压测试机台还包括公共电压烧录组件，与所述对待测显示面板的伽马控制电路电性连接，以将拟合计算组件输出的公共电压值烧录到待测显示面板的伽马控制电路中。
  16. 如权利要求12所述的一种显示面板的公共电压测试机台，其中，所述闪烁地量测仪为色彩分析仪。
  17. 如权利要求12所述的一种显示面板的公共电压测试机台，其中，所述闪烁地量测仪为高速亮度计。
  18. 如权利要求12所述的一种显示面板的公共电压测试机台，其中，所述的显示面板为液晶显示面板。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114203125A (zh) * 2021-12-07 2022-03-18 昆山龙腾光电股份有限公司 一种公共电压的获取方法、装置及计算机存储介质

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109410806A (zh) * 2018-10-30 2019-03-01 重庆先进光电显示技术研究院 一种快速寻找显示面板的公共电压的方法及测试机台
CN109215610B (zh) * 2018-11-13 2020-05-12 惠科股份有限公司 显示面板的实际最佳公共电压的确定方法、装置及系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070028021A (ko) * 2005-08-30 2007-03-12 엘지전자 주식회사 잔상 제거 기능을 구비한 투사형 디스플레이 장치 및 그제어방법
CN104732943A (zh) * 2015-04-08 2015-06-24 京东方科技集团股份有限公司 公共电压调节方法及调节装置、显示装置
CN108152679A (zh) * 2017-12-27 2018-06-12 南京工程学院 一种基于hht与闪变功率的闪变源定位方法
CN105681700B (zh) * 2016-01-28 2019-03-22 四川长虹电器股份有限公司 液晶电视的Flicker调试方法及装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100403398C (zh) * 2001-09-14 2008-07-16 美国仪表盘公司 可视显示器的测试、优化及调谐的方法
KR20060079981A (ko) * 2005-01-04 2006-07-07 삼성전자주식회사 액정 표시 장치, 이의 자동 플리커 조정 방법 및 장치
JP4756583B2 (ja) 2005-08-30 2011-08-24 株式会社東京精密 研磨パッド、パッドドレッシング評価方法、及び研磨装置
KR20070029393A (ko) * 2005-09-09 2007-03-14 삼성전자주식회사 표시 장치의 제조 장치 및 방법
KR101195570B1 (ko) * 2006-04-05 2012-10-30 삼성디스플레이 주식회사 최적 디브이알 값 추출방법 및 이를 수행하는 추출장치
KR20080105595A (ko) * 2007-05-31 2008-12-04 삼성전자주식회사 공통전압 설정장치 및 방법
KR102219132B1 (ko) * 2014-01-27 2021-02-23 삼성디스플레이 주식회사 액정 표시 장치
CN104181719B (zh) * 2014-09-17 2016-11-09 深圳市华星光电技术有限公司 调节液晶面板闪烁度的方法
CN106157870B (zh) * 2014-11-18 2019-04-02 深圳市华星光电技术有限公司 显示参数的调整方法、装置及液晶显示系统
KR102322709B1 (ko) * 2015-04-29 2021-11-08 엘지디스플레이 주식회사 영상 처리 방법 및 영상 처리 회로와 그를 이용한 표시 장치
CN105096860B (zh) 2015-07-31 2017-08-25 深圳市华星光电技术有限公司 一种tftlcd驱动电路通信方法、通信装置以及系统
CN105096880A (zh) * 2015-08-24 2015-11-25 武汉华星光电技术有限公司 一种液晶显示面板及其驱动方法
CN108172186A (zh) 2018-01-03 2018-06-15 京东方科技集团股份有限公司 显示面板及其驱动方法
CN108172188B (zh) * 2018-01-05 2020-10-13 上海闻泰电子科技有限公司 显示屏公共电压的烧录方法、装置和计算机可读存储介质
CN109410806A (zh) * 2018-10-30 2019-03-01 重庆先进光电显示技术研究院 一种快速寻找显示面板的公共电压的方法及测试机台

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070028021A (ko) * 2005-08-30 2007-03-12 엘지전자 주식회사 잔상 제거 기능을 구비한 투사형 디스플레이 장치 및 그제어방법
CN104732943A (zh) * 2015-04-08 2015-06-24 京东方科技集团股份有限公司 公共电压调节方法及调节装置、显示装置
CN105681700B (zh) * 2016-01-28 2019-03-22 四川长虹电器股份有限公司 液晶电视的Flicker调试方法及装置
CN108152679A (zh) * 2017-12-27 2018-06-12 南京工程学院 一种基于hht与闪变功率的闪变源定位方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114203125A (zh) * 2021-12-07 2022-03-18 昆山龙腾光电股份有限公司 一种公共电压的获取方法、装置及计算机存储介质

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