WO2019024323A1 - 获取液晶面板充电率的方法 - Google Patents

获取液晶面板充电率的方法 Download PDF

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Publication number
WO2019024323A1
WO2019024323A1 PCT/CN2017/111048 CN2017111048W WO2019024323A1 WO 2019024323 A1 WO2019024323 A1 WO 2019024323A1 CN 2017111048 W CN2017111048 W CN 2017111048W WO 2019024323 A1 WO2019024323 A1 WO 2019024323A1
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picture
display brightness
liquid crystal
crystal panel
actual display
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PCT/CN2017/111048
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English (en)
French (fr)
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郝思坤
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深圳市华星光电半导体显示技术有限公司
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Priority to US15/742,045 priority Critical patent/US10304366B2/en
Priority to KR1020207006237A priority patent/KR102305271B1/ko
Priority to PL17919771.0T priority patent/PL3664068T3/pl
Priority to JP2020524662A priority patent/JP6968277B2/ja
Priority to EP17919771.0A priority patent/EP3664068B1/en
Publication of WO2019024323A1 publication Critical patent/WO2019024323A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control 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
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0084Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0252Improving the response speed

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a method for obtaining a charging rate of a liquid crystal panel.
  • Liquid crystal display referred to as liquid crystal panel
  • LCD has many advantages such as thin body, power saving, no radiation, etc., and has been widely used, such as: LCD TV, smart phone, digital camera, tablet computer, computer Screens, or laptop screens, etc., dominate the field of flat panel display.
  • the working principle of the liquid crystal panel is to fill liquid crystal molecules between a Thin Film Transistor Array Substrate (TFT Array Substrate) and a Color Filter (CF) substrate, and apply a driving voltage on the two substrates.
  • TFT Array Substrate Thin Film Transistor Array Substrate
  • CF Color Filter
  • the effective display area AA of the liquid crystal panel has a plurality of pixels P arranged in an array, and each pixel P includes red sub-pixels R, green sub-pixels G, and blue sub-arrays arranged in the longitudinal direction.
  • a pixel B each sub-pixel is electrically connected to a thin film transistor (TFT) T, the gate of the thin film transistor T is connected to the scan line 100 extending in the lateral direction, and the source is connected to the data line 200 extending in the longitudinal direction, and the drain
  • TFT thin film transistor
  • the pole is connected to the pixel electrode PX; typically one pixel P corresponds to one data line 200 and three scan lines 100, which is called the Trigate architecture in the industry.
  • Applying the gate scan signal Gate on the scan line 100 causes all the thin film transistors T electrically connected to the scan line 100 to be turned on, and the data signal Data applied to the data line 200 can be written into the corresponding sub-pixels to control the liquid crystal. Transmittance then achieves the effect of controlling color and brightness.
  • the Charging Ratio is an important indicator of the liquid crystal panel, and its size directly affects the display performance such as brightness, transmittance, and image quality of the liquid crystal panel.
  • the calculation formula for the charging rate C Ratio is:
  • V data represents the voltage of the data signal Data during the action of the gate scan signal Gate
  • V pixel represents the peak value of the corresponding pixel voltage after the sub-pixel is charged.
  • the action time of the gate scan signal Gate is equal to the action time of the data signal Data, and there is no precharge process, and the charging rate of the liquid crystal panel is relatively low.
  • the action time of the gate scan signal Gate may be longer than the action time of the data signal Data. In this mode, there is a precharge process, and the liquid crystal The charging rate of the panel is improved.
  • the traditional method of obtaining the charging rate of the liquid crystal panel is as follows:
  • the pixel voltage is simulated and the charging rate is calculated.
  • the above conventional method for obtaining the charging rate of the liquid crystal panel has obvious disadvantages: the charging rate only has simulation results, the accuracy cannot be guaranteed, and it cannot be verified by experiments.
  • the object of the present invention is to provide a method for obtaining a charging rate of a liquid crystal panel, which has high accuracy and can be used for verifying the accuracy of a charging rate simulation result obtained by a conventional method.
  • the present invention provides a method for obtaining a charging rate of a liquid crystal panel, comprising the following steps:
  • Step S1 providing a liquid crystal panel
  • Step S2 measuring the V-T curve of the liquid crystal panel, and the voltage corresponding to the highest point of the V-T curve is a data signal voltage
  • Step S3 illuminate the reload screen of the liquid crystal panel and the light load screen according to the same gray level, measure and record the actual display brightness of the reloaded screen, and the actual display brightness of the light load screen;
  • Step S4 calculating a ratio of an actual display brightness of the reloaded picture to an actual display brightness of the light load picture
  • Step S5 in which the ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-load picture is proportional, and the measurement point corresponding to the highest point is marked on the VT curve to find the measurement.
  • the voltage corresponding to the point is the peak value of the pixel voltage
  • Step S6 calculating a charging rate of the liquid crystal panel according to the peak value of the pixel voltage and the data signal voltage:
  • C Ratio represents the charging rate of the liquid crystal panel
  • V data represents the data signal voltage
  • V pixel represents the peak value of the pixel voltage
  • the light load screen is an all white screen.
  • the overloaded picture includes a pure red picture of a monochrome picture, a pure green picture of a monochrome picture, And a pure blue picture of a monochrome picture.
  • the step S3 lighting the light load screen is realized by sequentially lighting a pure red picture of a monochrome picture, a pure green picture of a monochrome picture, and a pure blue picture of a monochrome picture.
  • the step S4 calculates the ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-load picture:
  • Lv Ratio represents the ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-loaded picture
  • Lv R represents the actual display brightness of the pure red picture of the monochrome picture
  • Lv G represents the actual green picture of the monochrome picture.
  • the display brightness, Lv B represents the actual display brightness of the pure blue picture of the monochrome picture
  • Lv W represents the actual display brightness of the all white picture.
  • the same gray level in the step S3 is 255 gray levels.
  • the pre-charging process exists in the all-white picture, the pure red picture of the monochrome picture, the pure green picture of the monochrome picture, and the pure blue picture of the monochrome picture.
  • the invention also provides a method for obtaining a charging rate of a liquid crystal panel, comprising the following steps:
  • Step S1 providing a liquid crystal panel
  • Step S2 measuring the V-T curve of the liquid crystal panel, and the voltage corresponding to the highest point of the V-T curve is a data signal voltage
  • Step S3 illuminate the reload screen of the liquid crystal panel and the light load screen according to the same gray level, measure and record the actual display brightness of the reloaded screen, and the actual display brightness of the light load screen;
  • Step S4 calculating a ratio of an actual display brightness of the reloaded picture to an actual display brightness of the light load picture
  • Step S5 in which the ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-load picture is proportional, and the measurement point corresponding to the highest point is marked on the VT curve to find the measurement.
  • the voltage corresponding to the point is the peak value of the pixel voltage
  • Step S6 calculating a charging rate of the liquid crystal panel according to the peak value of the pixel voltage and the data signal voltage:
  • C Ratio represents a charging rate of the liquid crystal panel
  • V data represents a data signal voltage
  • V pixel represents a peak value of the pixel voltage
  • the light load picture is an all white picture
  • the overloaded picture includes a pure red picture of a monochrome picture, a pure green picture of a monochrome picture, and a pure blue picture of a monochrome picture;
  • the step S3 lighting the light load screen is realized by sequentially lighting a pure red picture of a monochrome picture, a pure green picture of a monochrome picture, and a pure blue picture of a monochrome picture;
  • the pre-charging process exists in the all-white picture, the pure red picture of the monochrome picture, the pure green picture of the monochrome picture, and the pure blue picture of the monochrome picture.
  • the invention provides a method for obtaining the charging rate of the liquid crystal panel, and obtains the charging rate of the liquid crystal panel by the actual measuring method: firstly, the VT curve of the liquid crystal panel is measured, and the highest point of the VT curve corresponds to The voltage is the data signal voltage; then the same gray scale is used to illuminate the reload screen of the LCD panel and the light load screen, measure and record the actual display brightness of the reloaded screen, and the actual display brightness of the light load screen, and calculate The ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-load picture, and then the ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-loaded picture, marked on the VT curve
  • the measurement point proportional to the highest point find the voltage corresponding to the measurement point is the peak value of the pixel voltage; finally calculate the ratio of the peak value of the pixel voltage to the data signal voltage to obtain the charging rate of the liquid crystal panel, accurate It is also highly versatile and can be used to verify the accuracy of simulation
  • 1 is a schematic structural view of an effective display area in a liquid crystal panel using a Trigate architecture
  • FIG. 2 is a timing chart in the case where the liquid crystal panel shown in FIG. 1 does not have a precharge process
  • FIG. 3 is a timing chart in the case where the liquid crystal panel shown in FIG. 1 has a precharge process
  • FIG. 4 is a flow chart of a method for obtaining a charging rate of a liquid crystal panel according to the present invention.
  • FIG. 5 is a schematic diagram of a V-T curve used in a method for obtaining a charging rate of a liquid crystal panel according to the present invention
  • FIG. 6 is a schematic diagram of lighting a full white screen in a method for obtaining a charging rate of a liquid crystal panel according to the present invention
  • Figure 7 is a timing chart corresponding to Figure 6;
  • FIG. 8 is a schematic diagram of a pure green screen for lighting a monochrome picture in the method for obtaining a charging rate of a liquid crystal panel according to the present invention
  • Figure 9 is a timing chart corresponding to Figure 8.
  • FIG. 10 is a schematic explanatory diagram of a method for obtaining a charging rate of a liquid crystal panel according to the present invention.
  • the present invention provides a method for obtaining a charging rate of a liquid crystal panel, including the following steps:
  • step S1 a liquid crystal panel is provided.
  • the liquid crystal panel is an existing liquid crystal panel adopting a Trigate structure as shown in FIG. 1 , and has a plurality of pixels P arranged in an array in the effective display area AA, and each pixel P includes sequentially arranged in the longitudinal direction. a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B. Each sub-pixel is electrically connected to a thin film transistor T.
  • the gate of the thin film transistor T is connected to the scan line 100 extending in the lateral direction, and the source is connected to the longitudinal direction.
  • the extended data line 200 has a drain connected to the pixel electrode PX; one pixel P corresponds to one data line 200 and three scan lines 100.
  • Applying the gate scan signal Gate on the scan line 100 causes all the thin film transistors T electrically connected to the scan line 100 to be turned on, and the data signal Data applied to the data line 200 can be written into the corresponding sub-pixels to control the liquid crystal. Transmittance then achieves the effect of controlling color and brightness.
  • Step S2 as shown in FIG. 5, measures the relationship between the transmittance of the liquid crystal panel and the voltage change, which is called V-T curve in the industry (V represents voltage, and T represents transmittance).
  • the voltage corresponding to the highest point D1 of the VT curve is the data signal voltage Vdata .
  • Step S3 please refer to FIG. 6 and FIG. 8 , respectively, the liquid crystal panel's reload screen and the light load screen are respectively illuminated according to the same gray level, and the actual display brightness of the reloaded screen and the actual display brightness of the light load screen are measured and recorded. .
  • the same gray scale is preferably 255 gray scales.
  • the light-load picture is an all-white picture, that is, the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B are all illuminated in 255 gray scales.
  • the light-loading picture of the liquid crystal panel is pre-charged, and the pre-charge voltage is high, and the final pixel voltage peak value Vpixel can reach the data signal voltage Vdata .
  • the reloaded picture includes a pure red picture of a monochrome picture, a pure green picture of a monochrome picture, and a pure blue picture of a monochrome picture.
  • the light-loaded picture is illuminated by sequentially lighting the pure red picture of the monochrome picture, that is, the red sub-pixel R is illuminated only by 255 gray scale, and the pure green picture of the monochrome picture is illuminated by the green sub-pixel only by 255 gray scale. G, and the pure blue picture of the monochrome picture is realized by lighting the blue sub-pixel B only by 255 gray scales.
  • the liquid crystal panel reloading picture (taking the pure green picture of the monochrome picture as an example) also has a pre-charging process, but the pre-charging voltage is low, and the final pixel voltage peak V pixel is smaller than the data signal. Voltage V data .
  • step S4 the ratio of the actual display brightness of the reload screen to the actual display brightness of the light load screen is calculated.
  • the step S4 calculates the actual display brightness of the reloaded picture and the actual display of the light-loaded picture.
  • the formula used to show the ratio of brightness is:
  • Lv Ratio represents the ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-loaded picture
  • Lv R represents the actual display brightness of the pure red picture of the monochrome picture
  • Lv G represents the actual green picture of the monochrome picture.
  • the display brightness, Lv B represents the actual display brightness of the pure blue picture of the monochrome picture
  • Lv W represents the actual display brightness of the all white picture.
  • Step S5 referring to FIG. 5, the ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-load picture is proportional to the measurement point on the VT curve that is proportional to the highest point D1.
  • D2 finding the voltage corresponding to the measuring point D2 is the peak value of the pixel voltage Vpixel .
  • Step S6 Calculating a charging rate of the liquid crystal panel according to the peak value Vpixel of the pixel voltage and the data signal voltage Vdata :
  • C Ratio represents the charging rate of the liquid crystal panel
  • V data represents the data signal voltage
  • V pixel represents the peak value of the pixel voltage
  • the principle of the method for obtaining the charging rate of the liquid crystal panel of the present invention is as follows:
  • the actual display brightness of the 255 grayscale is less than the actual display brightness of the 255 grayscale of the full white picture, for example, the actual display brightness of the 255 grayscale pure green picture is only up to
  • the actual display brightness of the 255 gray-scale full-white picture is 91%, that is, the actual display brightness of the 255 gray-scale pure green picture is equal to the actual display brightness of the 232 gray-scale full-white picture, and the equality between the brightness corresponds to the peak value of the pixel voltage V.
  • the method for obtaining the charging rate of the liquid crystal panel of the present invention obtains the charging rate of the liquid crystal panel by the actual measuring method: firstly, the VT curve of the liquid crystal panel is measured, and the voltage corresponding to the highest point of the VT curve is data. Signal voltage; then, according to the same gray level, respectively, the reload screen of the liquid crystal panel and the light load screen are respectively illuminated, and the actual display brightness of the reloaded picture and the actual display brightness of the light load picture are measured, and the reloaded picture is calculated.
  • the ratio of the actual display brightness to the actual display brightness of the light-load picture, and then the ratio of the actual display brightness of the reloaded picture to the actual display brightness of the light-load picture is proportional to the highest point on the VT curve. Measurement of this ratio Point, find the voltage corresponding to the measurement point is the peak value of the pixel voltage; finally calculate the ratio of the peak value of the pixel voltage to the data signal voltage to obtain the charging rate of the liquid crystal panel, the accuracy is high, and can also be used for verification The accuracy of the charging rate simulation results obtained by the conventional method.

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Abstract

一种获取液晶面板充电率的方法,首先量测出液晶面板的V-T曲线,该V-T曲线的最高点(D1)对应的电压为数据信号电压(V data);然后按同一灰阶分别点亮液晶面板的重载画面、与轻载画面,量测并记录重载画面、轻载画面的实际显示亮度,计算出重载画面的实际显示亮度与轻载画面的实际显示亮度的比值,再以该比值为比例,在V-T曲线上标记出与最高点(D1)呈此比例的量测点(D2),找出该量测点(D2)对应的电压即为像素电压的峰值(V pixel);最后计算像素电压的峰值(V pixel)与数据信号电压(V data)的比值即获得液晶面板的充电率。该方法准确性较高,还能够用于验证采用传统方法获取的充电率模拟结果的准确性。

Description

获取液晶面板充电率的方法 技术领域
本发明涉及显示技术领域,尤其涉及一种获取液晶面板充电率的方法。
背景技术
液晶显示面板(Liquid Crystal Display,LCD),简称液晶面板,具有机身薄、省电、无辐射等众多优点,得到了广泛地应用,如:液晶电视、智能手机、数字相机、平板电脑、计算机屏幕、或笔记本电脑屏幕等,在平板显示领域中占主导地位。
液晶面板的工作原理是在薄膜晶体管阵列基板(Thin Film Transistor Array Substrate,TFT Array Substrate)与彩色滤光片(Color Filter,CF)基板之间灌入液晶分子,并在两片基板上施加驱动电压来控制液晶分子的旋转方向,将背光模组的光线折射出来产生画面。
请参阅图1,液晶面板的有效显示区AA内具有多个呈阵列式排布的像素P,每一像素P又包括沿纵向依次排列的红色子像素R、绿色子像素G、与蓝色子像素B,每个子像素电性连接一个薄膜晶体管(Thin Film Transistor,TFT)T,薄膜晶体管T的栅极连接至沿横向延伸的扫描线100,源极连接至沿纵向延伸的数据线200,漏极则连接至像素电极PX;通常一个像素P对应于一条数据线200、及三条扫描线100,业内称之为Trigate架构。在扫描线100上施加栅极扫描信号Gate,会使得电性连接该扫描线100的所有薄膜晶体管T打开,施加于数据线200上的数据信号Data便能够写入相应的子像素,控制液晶的透光度进而达到控制色彩与亮度的效果。
充电率(Charging Ratio)是液晶面板的一项重要指标,其大小直接影响到液晶面板的亮度、穿透率、画质等显示性能。请参阅图2,充电率CRatio的计算公式为:
CRatio=(Vpixel/Vdata)×100%
其中,Vdata表示在栅极扫描信号Gate作用时间内数据信号Data的电压,Vpixel表示子像素充电后相应像素电压的峰值。
通常情况下,如图2所示,栅极扫描信号Gate的作用时间等于数据信号Data的作用时间,不存在预充电过程,液晶面板的充电率相对较低。为了提高充电率,可如图3所示设置栅极扫描信号Gate的作用时间长于数据信号Data的作用时间,在此方式下,存在预充电(Precharge)过程,液晶 面板的充电率得以提高。
传统的获取液晶面板充电率的方法的过程为:
确定像素的线路布局(Layout);
确定构成像素的各个膜层的厚度及电性参数,如导电率、介电常数等;
提取相关电阻、电容等的电性参数;
根据子像素内薄膜晶体管的特性建立薄膜晶体管的参数表(Model Card);
根据液晶面板的驱动方式建立模拟仿真(Spice)模型;
模拟出像素电压,计算出充电率。
上述传统的获取液晶面板充电率的方法存在明显的缺点:充电率仅仅有模拟结果,准确性无法保证,也无法通过实验进行验证。
发明内容
本发明的目的在于提供一种获取液晶面板充电率的方法,准确性较高,可以用于验证采用传统方法获取的充电率模拟结果的准确性。
为实现上述目的,本发明提供一种获取液晶面板充电率的方法,包括以下步骤:
步骤S1、提供液晶面板;
步骤S2、量测出液晶面板的V-T曲线,该V-T曲线的最高点对应的电压为数据信号电压;
步骤S3、按同一灰阶分别点亮液晶面板的重载画面、与轻载画面,量测并记录重载画面的实际显示亮度、与轻载画面的实际显示亮度;
步骤S4、计算出重载画面的实际显示亮度与轻载画面的实际显示亮度的比值;
步骤S5、以所述重载画面的实际显示亮度与轻载画面的实际显示亮度的比值为比例,在所述V-T曲线上标记出与最高点呈此比例的量测点,找出该量测点对应的电压即为像素电压的峰值;
步骤S6、根据所述像素电压的峰值与数据信号电压计算液晶面板的充电率:
CRatio=(Vpixel/Vdata)×100%
其中,CRatio表示液晶面板的充电率,Vdata表示数据信号电压,Vpixel表示像素电压的峰值。
所述轻载画面为全白画面。
所述重载画面包括单色画面的纯红色画面、单色画面的纯绿色画面、 及单色画面的纯蓝色画面。
所述步骤S3点亮轻载画面通过依次点亮单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面实现。
所述步骤S4计算重载画面的实际显示亮度与轻载画面的实际显示亮度的比值所使用的公式为:
LvRatio=(LvR+LvG+LvB)/LvW
其中:LvRatio表示重载画面的实际显示亮度与轻载画面的实际显示亮度的比值,LvR表示单色画面的纯红色画面的实际显示亮度,LvG表示单色画面的纯绿色画面的实际显示亮度,LvB表示单色画面的纯蓝色画面的实际显示亮度,LvW表示全白画面的实际显示亮度。
所述步骤S3中的同一灰阶为255灰阶。
所述全白画面、单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面均存在预充电过程。
本发明还提供一种获取液晶面板充电率的方法,包括以下步骤:
步骤S1、提供液晶面板;
步骤S2、量测出液晶面板的V-T曲线,该V-T曲线的最高点对应的电压为数据信号电压;
步骤S3、按同一灰阶分别点亮液晶面板的重载画面、与轻载画面,量测并记录重载画面的实际显示亮度、与轻载画面的实际显示亮度;
步骤S4、计算出重载画面的实际显示亮度与轻载画面的实际显示亮度的比值;
步骤S5、以所述重载画面的实际显示亮度与轻载画面的实际显示亮度的比值为比例,在所述V-T曲线上标记出与最高点呈此比例的量测点,找出该量测点对应的电压即为像素电压的峰值;
步骤S6、根据所述像素电压的峰值与数据信号电压计算液晶面板的充电率:
CRatio=(Vpixel/Vdata)×100%
其中,CRatio表示液晶面板的充电率,Vdata表示数据信号电压,Vpixel表示像素电压的峰值;
其中,所述轻载画面为全白画面;
其中,所述重载画面包括单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面;
其中,所述步骤S3点亮轻载画面通过依次点亮单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面实现;
其中,所述全白画面、单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面均存在预充电过程。
本发明的有益效果:本发明提供的一种获取液晶面板充电率的方法,通过实际量测的方法获取液晶面板的充电率:首先量测出液晶面板的V-T曲线,该V-T曲线的最高点对应的电压为数据信号电压;然后按同一灰阶分别点亮液晶面板的重载画面、与轻载画面,量测并记录重载画面的实际显示亮度、与轻载画面的实际显示亮度,计算出重载画面的实际显示亮度与轻载画面的实际显示亮度的比值,再以所述重载画面的实际显示亮度与轻载画面的实际显示亮度的比值为比例,在所述V-T曲线上标记出与最高点呈此比例的量测点,找出该量测点对应的电压即为像素电压的峰值;最后计算所述像素电压的峰值与数据信号电压的比值即获得液晶面板的充电率,准确性较高,还能够用于验证采用传统方法获取的充电率模拟结果的准确性。
附图说明
为了能更进一步了解本发明的特征以及技术内容,请参阅以下有关本发明的详细说明与附图,然而附图仅提供参考与说明用,并非用来对本发明加以限制。
附图中,
图1为现有的采用Trigate架构的液晶面板内有效显示区的结构示意图;
图2为图1所示液晶面板不存在预充电过程情况下的时序图;
图3为图1所示液晶面板存在预充电过程情况下的时序图;
图4为本发明的获取液晶面板充电率的方法的流程图;
图5为本发明的获取液晶面板充电率的方法中所用到的V-T曲线的示意图;
图6为本发明的获取液晶面板充电率的方法中点亮全白画面的示意图;
图7为对应于图6的时序图;
图8为本发明的获取液晶面板充电率的方法中点亮单色画面的纯绿色画面的示意图;
图9为对应于图8的时序图;
图10为本发明的获取液晶面板充电率的方法的原理解释图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果,以下结合本发明 的优选实施例及其附图进行详细描述。
请参阅图4,本发明提供一种获取液晶面板充电率的方法,包括以下步骤:
步骤S1、提供液晶面板。
所述液晶面板即现有的如图1所示的采用Trigate架构的液晶面板,其有效显示区AA内具有多个呈阵列式排布的像素P,每一像素P又包括沿纵向依次排列的红色子像素R、绿色子像素G、与蓝色子像素B,每个子像素电性连接一个薄膜晶体管T,薄膜晶体管T的栅极连接至沿横向延伸的扫描线100,源极连接至沿纵向延伸的数据线200,漏极则连接至像素电极PX;一个像素P对应于一条数据线200、及三条扫描线100。在扫描线100上施加栅极扫描信号Gate,会使得电性连接该扫描线100的所有薄膜晶体管T打开,施加于数据线200上的数据信号Data便能够写入相应的子像素,控制液晶的透光度进而达到控制色彩与亮度的效果。
步骤S2、如图5所示,量测出液晶面板的穿透率随电压变化的关系曲线,业内称为V-T曲线(V表示电压,T表示穿透率)。
该V-T曲线的最高点D1对应的电压即为数据信号电压Vdata
步骤S3、请参阅图6与图8,按同一灰阶分别点亮液晶面板的重载画面、与轻载画面,量测并记录重载画面的实际显示亮度、与轻载画面的实际显示亮度。
具体地,所述同一灰阶优选255灰阶。
所述轻载画面为全白画面,即红色子像素R、绿色子像素G、与蓝色子像素B均按255灰阶点亮。结合图6与图7,点亮液晶面板的轻载画面存在预充电过程,且预充电的电压较高,最终的像素电压峰值Vpixel可达到数据信号电压Vdata
所述重载画面包括单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面。该步骤S3点亮轻载画面通过依次点亮单色画面的纯红色画面即仅按255灰阶点亮红色子像素R、单色画面的纯绿色画面即仅按255灰阶点亮绿色子像素G、及单色画面的纯蓝色画面即仅按255灰阶点亮蓝色子像素B实现。结合图8与图9,点亮液晶面板重载画面(以单色画面的纯绿色画面为例)也存在预充电过程,但预充电的电压较低,最终的像素电压峰值Vpixel小于数据信号电压Vdata
步骤S4、计算出重载画面的实际显示亮度与轻载画面的实际显示亮度的比值。
具体地,该步骤S4计算重载画面的实际显示亮度与轻载画面的实际显 示亮度的比值所使用的公式为:
LvRatio=(LvR+LvG+LvB)/LvW
其中:LvRatio表示重载画面的实际显示亮度与轻载画面的实际显示亮度的比值,LvR表示单色画面的纯红色画面的实际显示亮度,LvG表示单色画面的纯绿色画面的实际显示亮度,LvB表示单色画面的纯蓝色画面的实际显示亮度,LvW表示全白画面的实际显示亮度。
步骤S5、请参阅图5,以所述重载画面的实际显示亮度与轻载画面的实际显示亮度的比值为比例,在所述V-T曲线上标记出与最高点D1呈此比例的量测点D2,找出该量测点D2对应的电压即为像素电压的峰值Vpixel
步骤S6、根据所述像素电压的峰值Vpixel与数据信号电压Vdata计算液晶面板的充电率:
CRatio=(Vpixel/Vdata)×100%
其中,CRatio表示液晶面板的充电率,Vdata表示数据信号电压,Vpixel表示像素电压的峰值。
请参阅图10,结合图5,本发明的获取液晶面板充电率的方法的原理在于:
因重载画面(如单色画面的纯绿色画面)充电不足,其255灰阶的实际显示亮度不及全白画面255灰阶的实际显示亮度,例如255灰阶纯绿色画面的实际显示亮度仅达255灰阶全白画面的实际显示亮度的91%,即255灰阶纯绿色画面的实际显示亮度等于232灰阶全白画面的实际显示亮度,而亮度之间的相等对应于像素电压的峰值Vpixel之间的相等,亮度又与穿透率相对应,从而以所述重载画面的实际显示亮度与轻载画面的实际显示亮度的比值为比例,在所述V-T曲线上标记出与最高点D1呈此比例的量测点D2,找出该量测点D2对应的电压即获得了像素电压的峰值Vpixel,再通过计算所述像素电压的峰值Vpixel与数据信号电压Vdata的比值即获得液晶面板的充电率CRatio。该方法通过实际量测获取液晶面板充电率,准确性较高,还能够用于验证采用传统方法获取的充电率模拟结果的准确性。
综上所述,本发明的获取液晶面板充电率的方法,通过实际量测的方法获取液晶面板的充电率:首先量测出液晶面板的V-T曲线,该V-T曲线的最高点对应的电压为数据信号电压;然后按同一灰阶分别点亮液晶面板的重载画面、与轻载画面,量测并记录重载画面的实际显示亮度、与轻载画面的实际显示亮度,计算出重载画面的实际显示亮度与轻载画面的实际显示亮度的比值,再以所述重载画面的实际显示亮度与轻载画面的实际显示亮度的比值为比例,在所述V-T曲线上标记出与最高点呈此比例的量测 点,找出该量测点对应的电压即为像素电压的峰值;最后计算所述像素电压的峰值与数据信号电压的比值即获得液晶面板的充电率,准确性较高,还能够用于验证采用传统方法获取的充电率模拟结果的准确性。
以上所述,对于本领域的普通技术人员来说,可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形,而所有这些改变和变形都应属于本发明的权利要求的保护范围。

Claims (10)

  1. 一种获取液晶面板充电率的方法,包括以下步骤:
    步骤S1、提供液晶面板;
    步骤S2、量测出液晶面板的V-T曲线,该V-T曲线的最高点对应的电压为数据信号电压;
    步骤S3、按同一灰阶分别点亮液晶面板的重载画面、与轻载画面,量测并记录重载画面的实际显示亮度、与轻载画面的实际显示亮度;
    步骤S4、计算出重载画面的实际显示亮度与轻载画面的实际显示亮度的比值;
    步骤S5、以所述重载画面的实际显示亮度与轻载画面的实际显示亮度的比值为比例,在所述V-T曲线上标记出与最高点呈此比例的量测点,找出该量测点对应的电压即为像素电压的峰值;
    步骤S6、根据所述像素电压的峰值与数据信号电压计算液晶面板的充电率:
    CRatio=(Vpixel/Vdata)×100%
    其中,CRatio表示液晶面板的充电率,Vdata表示数据信号电压,Vpixel表示像素电压的峰值。
  2. 如权利要求1所述的获取液晶面板充电率的方法,其中,所述轻载画面为全白画面。
  3. 如权利要求2所述的获取液晶面板充电率的方法,其中,所述重载画面包括单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面。
  4. 如权利要求3所述的获取液晶面板充电率的方法,其中,所述步骤S3点亮轻载画面通过依次点亮单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面实现。
  5. 如权利要求4所述的获取液晶面板充电率的方法,其中,所述步骤S4计算重载画面的实际显示亮度与轻载画面的实际显示亮度的比值所使用的公式为:
    LvRatio=(LvR+LvG+LvB)/LvW
    其中:LvRatio表示重载画面的实际显示亮度与轻载画面的实际显示亮度的比值,LvR表示单色画面的纯红色画面的实际显示亮度,LvG表示单色画面的纯绿色画面的实际显示亮度,LvB表示单色画面的纯蓝色画面的实际显 示亮度,LvW表示全白画面的实际显示亮度。
  6. 如权利要求4所述的获取液晶面板充电率的方法,其中,所述步骤S3中的同一灰阶为255灰阶。
  7. 如权利要求3所述的获取液晶面板充电率的方法,其中,所述全白画面、单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面均存在预充电过程。
  8. 一种获取液晶面板充电率的方法,包括以下步骤:
    步骤S1、提供液晶面板;
    步骤S2、量测出液晶面板的V-T曲线,该V-T曲线的最高点对应的电压为数据信号电压;
    步骤S3、按同一灰阶分别点亮液晶面板的重载画面、与轻载画面,量测并记录重载画面的实际显示亮度、与轻载画面的实际显示亮度;
    步骤S4、计算出重载画面的实际显示亮度与轻载画面的实际显示亮度的比值;
    步骤S5、以所述重载画面的实际显示亮度与轻载画面的实际显示亮度的比值为比例,在所述V-T曲线上标记出与最高点呈此比例的量测点,找出该量测点对应的电压即为像素电压的峰值;
    步骤S6、根据所述像素电压的峰值与数据信号电压计算液晶面板的充电率:
    CRatio=(Vpixel/Vdata)×100%
    其中,CRatio表示液晶面板的充电率,Vdata表示数据信号电压,Vpixel表示像素电压的峰值;
    其中,所述轻载画面为全白画面;
    其中,所述重载画面包括单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面;
    其中,所述步骤S3点亮轻载画面通过依次点亮单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面实现;
    其中,所述全白画面、单色画面的纯红色画面、单色画面的纯绿色画面、及单色画面的纯蓝色画面均存在预充电过程。
  9. 如权利要求8所述的获取液晶面板充电率的方法,其中,所述步骤S4计算重载画面的实际显示亮度与轻载画面的实际显示亮度的比值所使用的公式为:
    LvRatio=(LvR+LvG+LvB)/LvW
    其中:LvRatio表示重载画面的实际显示亮度与轻载画面的实际显示亮度 的比值,LvR表示单色画面的纯红色画面的实际显示亮度,LvG表示单色画面的纯绿色画面的实际显示亮度,LvB表示单色画面的纯蓝色画面的实际显示亮度,LvW表示全白画面的实际显示亮度。
  10. 如权利要求8所述的获取液晶面板充电率的方法,其中,所述步骤S3中的同一灰阶为255灰阶。
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