WO2017012312A1 - 屏幕按压发黄判定方法及判定装置 - Google Patents

屏幕按压发黄判定方法及判定装置 Download PDF

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Publication number
WO2017012312A1
WO2017012312A1 PCT/CN2016/071029 CN2016071029W WO2017012312A1 WO 2017012312 A1 WO2017012312 A1 WO 2017012312A1 CN 2016071029 W CN2016071029 W CN 2016071029W WO 2017012312 A1 WO2017012312 A1 WO 2017012312A1
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Prior art keywords
value
test
screen
color
yellowing
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PCT/CN2016/071029
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English (en)
French (fr)
Inventor
杨刚
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京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Priority to US15/114,644 priority Critical patent/US9945724B2/en
Publication of WO2017012312A1 publication Critical patent/WO2017012312A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/506—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors measuring the colour produced by screens, monitors, displays or CRTs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/02—Details
    • G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
    • G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/462—Computing operations in or between colour spaces; Colour management systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/251—Colorimeters; Construction thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J2003/467—Colour computing

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a screen pressing yellowing determination method and a determining apparatus.
  • touch screen products such as mobile phones and tablet computers need to be tested by pressing, clicking and scribing the screen before leaving the factory to ensure good pressure resistance and durability of the touch screen products on the market.
  • the column spacers in the screen are easily damaged, thereby causing the liquid crystal to flow to the peripheral area of the screen, causing the periphery of the screen to appear.
  • Yellow is bad.
  • the yellowing is usually detected by manual operation; specifically, after the pressing test of the touch screen product is completed, the operator performs a visual judgment on the screen to determine whether the screen is a non-qualified product with poor yellowing. .
  • the artificial naked eye judges that the screen is yellow, which is greatly affected by the individual difference factors of the operator, and is prone to error.
  • the standard of each operator is different, there is a possibility of misjudgment, missed judgment or over-judgement, resulting in a lower accuracy rate of the yellowing of the judgment screen.
  • An object of the present disclosure is to provide a screen pressing yellowing determination method for solving the problem that the accuracy of the yellowing of the existing determination screen is low.
  • a screen pressing yellowing determination method includes: acquiring color coordinates of a plurality of test points on the screen during a press test; processing the acquired plurality of the color coordinates to obtain an X value or Y in the color coordinates a color difference value between the test point having the largest value and the test point having the smallest X value or Y value in the color coordinate; comparing the color difference value with a set standard color difference value to determine Whether the screen is a qualified product in pressing the yellowing detection.
  • the color coordinates of the plurality of test points on the screen during the pressing test are obtained, and the acquired plurality of color coordinates are processed to obtain the maximum X value or the Y value in the color coordinates.
  • the artificial naked eye detection method provides the screen pressing yellowing determination method, which can avoid the occurrence of false positives, missed judgments or over-recognition phenomena, thereby improving the accuracy of the screen pressing yellowing detection.
  • Another object of the present disclosure is to provide a screen pressing yellowing determining apparatus for solving the problem that the accuracy of the yellowing of the existing determination screen is low.
  • the present disclosure adopts the following technical solutions:
  • a screen pressing and yellowing determining device comprising: an obtaining module, configured to acquire color coordinates of a plurality of test points on the screen during a press test; and a processing module, configured to process the acquired plurality of the color coordinates, to Obtaining a color difference value between the test point in which the X value or the Y value is the largest in the color coordinate and the test point in which the X value or the Y value is the smallest in the color coordinate; a determining module, configured to use the color The difference is compared to the set standard color difference to determine if the screen is a good product in the press yellowing test.
  • the acquiring module is capable of acquiring the color coordinates of the plurality of test points on the screen during the pressing test, and transmitting the color coordinates to the processing module;
  • the processing module is capable of performing the acquired plurality of color coordinates Processing to obtain a color difference value between a test point having the largest X value or the Y value in the color coordinate and a test point having the smallest X value or Y value in the color coordinate, and transmitting the color difference value to the determination module;
  • the determination module can The color difference value is compared with the set standard color difference value to determine whether the screen is a qualified product in the pressing yellowing detection.
  • the screen pressing yellowing determining apparatus provided by the present disclosure, it is possible to accurately determine whether the screen is a qualified product in the pressing yellowing detection by the use of the acquiring module, the processing module, and the determining module, thereby The errors such as misjudgment, missed judgment or over-judgment caused by the existing artificial naked eye detection are avoided, thereby improving the accuracy of the screen pressing yellow detection.
  • 1A-1C are flowcharts of a method for determining a screen press yellowing according to an embodiment of the present disclosure
  • 2A-2D are related diagrams of a method for determining a yellow pressing of a screen according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of each module in a screen pressing yellowing determining apparatus according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a screen pressing yellowing determining apparatus according to an embodiment of the present disclosure.
  • the embodiment of the present disclosure provides a screen pressing yellowing determination method, as shown in FIG. 1A, including:
  • Step S1 obtaining color coordinates of a plurality of test points on the screen when the test is pressed;
  • the above color coordinate refers to the color coordinate corresponding to the point of the same color in the chromaticity diagram of the color corresponding to a certain test point on the screen.
  • a color coordinate (X, Y) is usually used to represent a color.
  • the standard red color coordinates are (0.67, 0.33)
  • the standard green color coordinates are (0.21, 0.71)
  • the standard blue color coordinates are (0.14, 0.08)
  • the pure white color coordinates are (0.33, 0.33).
  • the color coordinates herein are the color coordinates of the light rays emitted after the pixels of the test point are illuminated.
  • the color coordinates of the plurality of test points may be acquired one or more times.
  • Step S2 processing the acquired plurality of color coordinates, and determining color coordinates corresponding to the largest color coordinate or Y coordinate value (hereinafter referred to as Y value) having the largest X coordinate value (hereinafter referred to as X value) in the color coordinate.
  • Y value the largest color coordinate or Y coordinate value
  • X value the largest X coordinate value
  • Step S3 Comparing the determined color difference value with the standard color difference value to determine whether the screen is a qualified product in the pressing yellowing detection. Specifically, when the color difference value is not greater than the standard color difference value, it is determined that the screen is a qualified product in the pressing yellowing detection; when the color difference value is greater than the standard color difference value, determining that the screen is a non-conforming product in the pressing yellowing detection . Specifically, the determination may be made by the determination module.
  • the color coordinates of the plurality of test points on the screen during the pressing test are acquired, and the acquired plurality of color coordinates are processed to obtain the X value or the Y value in the color coordinates.
  • the screen pressing yellowing determination method provided by the embodiment of the present disclosure can avoid the occurrence of false positives, missed judgments or over-recognition phenomena, thereby improving the accuracy of the screen pressing yellowing detection.
  • step S1 may specifically include:
  • Step S11 Before pressing the test, select a plurality of test points at equal intervals along the short side of the screen, and the number of the plurality of test points is an odd number; as shown in FIG. 2A, before the press test, the short along the screen 4 Nine test points 5 are selected at equal intervals in the direction of the sides (as indicated by the rectangular boxes of the dashed third line in Fig. 2A).
  • Step S12 Acquire initial color coordinates of a plurality of test points before pressing the test.
  • step S13 during the pressing test, the number of pressing times of the screen is obtained every N times, and the current color coordinates of the plurality of test points are acquired.
  • N of the pressing times of the screen may be a positive integer, for example, “1” ".
  • steps S12 and S13 can be specifically combined with FIG. 2B to obtain the initial color coordinates of each test point 5 before the press test, and during the press test, the number of presses of the screen 4 is “1” thousands of times, and each is acquired. The current color coordinates of test point 5.
  • a plurality of sets of the above test points 5 may be selected along the direction of the long side of the screen 4 (as shown by a rectangular box having nine sets of dotted lines from top to bottom in FIG. 2A) ).
  • step S2 may specifically include:
  • Step S21 generating a first comparison map by using the X values in the initial color coordinates of the plurality of test points, or generating the first comparison map by using the X values in the current color coordinates of the plurality of test points under the same number of compressions;
  • Step S21' generating a second comparison map by Y values in initial color coordinates of the plurality of test points, or generating the second comparison map by Y values in current color coordinates of the plurality of test points under the same number of presses.
  • the above step S21 and step S21' may specifically generate a comparison graph of the X value and the Y value in the initial color coordinates of the nine test points 5 as shown in FIG. 2C (the comparison map may be the first comparison map and the second comparison map).
  • the above comparison chart is generated by synthesizing the X value and the Y value in the current color coordinates of the nine test points 5 under the same number of presses. For example, as shown in FIG. 2C, a comparison map of the X value and the Y value in the current color coordinates of the nine test points 5 under the "5" thousand number of presses may be shown.
  • the horizontal axis is a specific name of a plurality of test points, and the unit "1" is the distance between two adjacent test points.
  • the vertical axis in the first comparison chart represents the X value in the color coordinates of a plurality of test points.
  • FIG. 2C also integrates the second comparison map, the above horizontal axis coordinates are also applicable to the second comparison map, but at this time, the vertical axis represents the Y value in the color coordinates of the plurality of test points.
  • Step S22 the test point with the smallest X value in the color coordinate in the first comparison chart is taken as the first data point; in the first comparison chart, the data point corresponding to the X value of each test point is calculated and the first data is The first slope value of the line that is connected between the points.
  • the horizontal axis may be a plurality of test points, and the vertical axis may be an X value of color coordinates.
  • the test point where the X value is the smallest in the color coordinates is usually the test point in the middle position along the short side direction of the screen.
  • test point is mostly the center position, so the position is the most stressed, the deformation is the largest, the liquid crystal amount is also the least, and the corresponding color coordinates are also blue.
  • test points with the smallest X value in the color coordinates may also be other points, for example as shown in FIG. 2C.
  • Step S22' the test point with the smallest Y value in the color coordinate in the second comparison chart is taken as the second data point; in the second comparison chart, the data point corresponding to the Y value of each test point is calculated and the second The second slope value of the line formed between the data points.
  • the horizontal axis may be a plurality of test points, and the vertical axis may be a Y value of color coordinates.
  • step S22 and step S22' may be specifically shown in FIG. 2C, and the X value in the color coordinates of the test point 5 located at the intermediate position in the short side direction of the screen 4 is taken as the first data point and the Y value as the second data. point.
  • a first slope value of a straight line connecting the X value of each test point 5 with the first data point, and a Y value between each test point 5 and the second data point are calculated.
  • the second slope value of the resulting line Since the color coordinates of the test points 5, which are usually located at both sides in the short-side direction of the screen 4, are large, in order to reflect the greater degree of yellowing of the screen 4, only four broken lines are schematically shown in FIG. 2C, respectively. There is a first slope value and a second slope value.
  • the above step S2 may further include: Step S23: comparing the absolute values of the plurality of first slope values and/or the absolute values of the second slope values (obviously, the slope values on the left and right sides are different numbers)
  • the absolute value of the maximum first slope value or the absolute value of the second slope value is used as the color difference between the test point where the X value or the Y value is the largest in the color coordinate and the test point where the X value or the Y value is the smallest in the color coordinate. value.
  • the 2C are compared with the absolute values of the two second slope values, and a first slope value or a second slope value in which the absolute value is the largest is used as the color.
  • the color difference between the test point 5 in which the X value or the Y value is the largest in the coordinate and the test point 5 in which the X value or the Y value in the color coordinate is the smallest.
  • the slope values described hereinafter refer to the absolute value of the slope value regardless of its sign.
  • the above step S3 may specifically compare the calculated maximum first slope value and/or second slope value with the set standard color difference value as shown in FIG. 2D, and set “0.5” as the setting in the present disclosure.
  • Standard color difference value in FIG. 2D, a plurality of maximum first slope values and/or second slope values corresponding to different pressing times; when the maximum first slope value and/or the second slope value is not greater than the standard color
  • the determination screen 4 is a qualified product in the pressing yellowing detection, for example, as shown in FIG. 2D, when the "5" thousand times of pressing, the screen 4 is still a qualified product in the yellowing detection, but if it continues When the screen 4 is pressed, the screen 4 will soon become a defective product.
  • the above-mentioned screen pressing yellowing determination method may further include: dividing the color difference value by the standard color difference value in the screen for pressing the yellowing detection to be determined by the calculated quotient The degree of yellowing of the screen. The larger the quotient after the above calculation, the more serious the yellowing of the screen.
  • the determination method exemplified above is only one type of the screen pressing yellowing determination method provided by the embodiment of the present disclosure, and can also be determined by determining the color coordinates of each test point in the coordinate graph to resemble a parabola.
  • the curvature value is used for the determination.
  • the specific process is similar to the determination of the slope value.
  • the method may include: acquiring color coordinates of a plurality of test points on the screen during the pressing test; and processing the acquired plurality of color coordinates to obtain X in the color coordinate.
  • the color difference values in the embodiments of the present disclosure may include, but are not limited to, a slope value, a curvature value, and the like.
  • the curvature value refers to: generating a comparison map of X values or Y values in initial color coordinates of a plurality of test points, or X values of current color coordinates of a plurality of test points under the same number of compressions or
  • the Y value generates a comparison graph.
  • the horizontal axis represents the specific names of the plurality of test points, and the unit "1" is the distance between two adjacent test points, and the vertical axis represents the color coordinates of the plurality of test points.
  • X value or Y value ; compare the X value of each test point in the graph or the data point corresponding to the Y value of each test point into a parabola, and each data point on the parabola has a curvature corresponding thereto value.
  • a detection point 5 may be taken in the direction of the long side of the screen 4, and the color coordinates of the detection point 5 are acquired after the completion of different pressing times, and the color coordinates are compared with the standard color coordinates to determine the screen.
  • the embodiment of the present disclosure further provides a screen pressing yellowing determining device, as shown in FIG. 3, comprising: an obtaining module 1 for acquiring color coordinates of a plurality of test points on a screen during a press test; and a processing module 2 for Obtaining a plurality of color coordinates for processing to obtain a color difference value between a test point having the largest X value or the Y value in the color coordinate and a test point having the smallest X value or Y value in the color coordinate; the determining module 3 is configured to The color difference value is compared with the set standard color difference value to determine whether the screen is a qualified product in the press yellowing detection.
  • the acquisition module may be an optical test lens
  • the processing module and the determination module may be a central processing unit or the like.
  • the obtaining module 1 can acquire the color coordinates of the plurality of test points 5 on the screen 4 during the pressing test, and send the color coordinates to the processing module 2; the processing module 2 can The acquired plurality of color coordinates are processed to obtain a color difference value between the test point 5 in which the X value or the Y value is the largest in the color coordinate and the test point 5 in which the X value or the Y value in the color coordinate is the smallest, and the color difference is obtained. The value is sent to the decision module 3; the decision module 3 can compare the color difference value with the set standard color difference value to determine whether the screen 4 is a qualified product in the press yellowing detection.
  • the screen pressing yellowing determining apparatus provided by the embodiment of the present disclosure can accurately determine whether the screen 4 is a qualified product in the pressing yellowing detection by the cooperation of the obtaining module 1, the processing module 2, and the determining module 3. Therefore, errors such as misjudgment, missed judgment or over-judgment caused by the existing artificial naked eye detection are avoided, thereby improving the accuracy of the screen 4 pressing yellow detection.
  • the screen pressing yellowing determining apparatus may include: an indenter mechanism 11 for performing a press test on the screen 4; and an optical test lens 12 disposed in the indenter mechanism 11, the optical test lens 12 Used to obtain the color coordinates of each test point 5 on the screen 4.
  • the optical test lens 12 can adopt a lens similar to that in the display color analyzer CA-210, but the test accuracy and speed of the optical test lens 12 need to be superior to that of the CA-210. Therefore, the acquisition module 1 can acquire the color coordinates of the test point 5 on the screen 4 at the lower end of the indenter mechanism 11 at any time by the optical test lens 12 built in the yellowing determination device in the press test of the screen 4, and send it to the processing.
  • Module 2
  • the pressing end of the indenter mechanism 11 may preferably be made of an optical wear-resistant glass material, thereby ensuring the normal operation of the pressing test.
  • the optical test lens 12 built in the indenter mechanism 11 can have a better optical measurement effect.
  • the screen pressing yellowing determination method and the determining device provided by the embodiments of the present disclosure can solve the problem that the existing artificial naked eye detection is performed after the end of the screen pressing test, and cannot accurately determine how many times the screen is pressed. There is a problem of unqualified yellowing.
  • the screen pressing yellowing determination method and the determining device provided by the embodiments of the present disclosure can effectively judge the yellowing of the screen periphery during the pressing test, thereby avoiding errors and untimeliness caused by artificial naked eye judgment, and is easy to implement. .

Abstract

一种屏幕按压发黄判定方法及判定装置。屏幕按压发黄判定方法包括：获取按压测试时屏幕上多个测试点的色坐标（S1）；对获取的多个色坐标进行处理，以得到色坐标中X值或Y值最大的测试点与色坐标中X值或Y值最小的测试点之间的色差值（S2）；将色差值与设定的标准色差值进行比较，以判定屏幕在按压发黄检测中是否为合格产品（S3）。通过使用该方法，可以提高判定屏幕发黄不良的准确率。

Description

屏幕按压发黄判定方法及判定装置
相关申请的交叉引用
本申请主张在2015年7月20日在中国提交的中国专利申请号No.201510428977.8的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及显示技术领域，尤其涉及一种屏幕按压发黄判定方法及判定装置。
背景技术
目前，显示装置如手机和平板电脑等触屏产品，在出厂前均需要进行屏幕的按压、点击和划线等测试，以保证市场上触屏产品具有良好的抗压性和耐久性。
其中，在触屏产品的按压测试过程中，由于屏幕在经过数十万次的按压操作后，容易导致其内的柱状隔垫物损坏，进而导致液晶流向屏幕的周边区域，造成屏幕周边出现发黄不良。现有技术中，通常采用人工操作对发黄不良进行检测；具体地，在触屏产品的按压测试完成后，操作人员对其屏幕进行肉眼判断，以确定屏幕是否为发黄不良的非合格产品。
然而，人工肉眼判断屏幕发黄不良，受操作人员的个体差异因素影响较大，容易产生误差。例如每个操作人员的标准不同，会存在误判、漏判或过判的可能性，导致判断屏幕发黄不良的准确率较低。
发明内容
本公开的目的在于提供一种屏幕按压发黄判定方法，用于解决现有判定屏幕发黄不良的准确率较低的问题。
为达到上述目的，本公开采用如下技术方案：
一种屏幕按压发黄判定方法，包括：获取按压测试时所述屏幕上多个测试点的色坐标；对获取的多个所述色坐标进行处理，以得到所述色坐标中X值或Y值最大的所述测试点与所述色坐标中X值或Y值最小的所述测试点之间的色差值；将所述色差值与设定的标准色差值进行比较，以判定所述屏幕在按压发黄检测中是否为合格产品。
本公开提供的屏幕按压发黄判定方法中，通过获取按压测试时屏幕上多个测试点的色坐标，并对获取的多个色坐标进行处理，以得到色坐标中X值或Y值最大的测试点与色坐标中X值或Y值最小的测试点之间的色差值，然后将色差值与设定的标准色差值进行比较，以判定屏幕在按压发黄检测中是否为合格产品。
相比于现有技术采用人工肉眼检测，本公开提供的屏幕按压发黄判定方法，能够避免误判、漏判或过判现象出现，从而提高了屏幕按压发黄检测的准确率。
本公开的另一目的在于提供一种屏幕按压发黄判定装置，用于解决现有判定屏幕发黄不良的准确率较低的问题。为达到上述目的，本公开采用如下技术方案：
一种屏幕按压发黄判定装置，包括：获取模块，用于获取按压测试时所述屏幕上多个测试点的色坐标；处理模块，用于对获取的多个所述色坐标进行处理，以得到所述色坐标中X值或Y值最大的所述测试点与所述色坐标中X值或Y值最小的所述测试点之间的色差值；判定模块，用于将所述色差值与设定的标准色差值进行比较，以判定所述屏幕在按压发黄检测中是否为合格产品。
本公开提供的屏幕按压发黄判定装置中，获取模块能够获取按压测试时屏幕上多个测试点的色坐标，并将该色坐标发送给处理模块；处理模块能够对获取的多个色坐标进行处理，以得到色坐标中X值或Y值最大的测试点与色坐标中X值或Y值最小的测试点之间的色差值，并将该色差值发送给判定模块；判定模块能够将上述色差值与设定的标准色差值进行比较，以判定屏幕在按压发黄检测中是否为合格产品。相比于现有技术，由于本公开提供的屏幕按压发黄判定装置，能够通过获取模块、处理模块和判定模块的配合使用，准确地判断出屏幕在按压发黄检测中是否为合格产品，从而避免了现有的人工肉眼检测所导致的误判、漏判或过判等误差，进而提高了屏幕按压发黄检测的准确率。
附图说明
图1A-1C为本公开实施例提供的屏幕按压发黄判定方法的流程图；
图2A-2D为本公开实施例提供的屏幕按压发黄判定方法的相关示意图；
图3为本公开实施例提供的屏幕按压发黄判定装置中各模块的示意图；
图4为本公开实施例提供的屏幕按压发黄判定装置的结构示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”或者“一”等类似词语也不表示数量限制，而是表示存在至少一个。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也相应地改变。
为了便于理解，下面结合说明书附图，对本公开实施例提供的屏幕按压发黄判定方法及判定装置进行详细描述。
本公开实施例提供一种屏幕按压发黄判定方法，如图1A所示，包括：
步骤S1、获取按压测试时屏幕上多个测试点的色坐标；
上述色坐标是指屏幕上的某个测试点所对应的颜色在色度图中的相同颜色的点所对应的色坐标。色度学中通常用色坐标(X，Y)来表示一种颜色。例如，标准红色的色坐标为(0.67，0.33)、标准绿色的色坐标为(0.21，0.71)、标准蓝色的色坐标为(0.14，0.08)、纯正的白光色坐标为(0.33，0.33)。
本领域技术人员应当理解，这里的色坐标为该测试点的像素被点亮以后发出的光线的色坐标。所述多个测试点的色坐标可以一次或多次获取。
步骤S2、对获取的所述多个色坐标进行处理，确定色坐标中X坐标值(以下简称X值)最大的色坐标或Y坐标值(以下简称Y值)最大的色坐标对应 的测试点与色坐标中X值最小的色坐标或Y值最小的色坐标对应的测试点之间的色差值；具体可以通过处理模块进行处理。
步骤S3、将上述确定的色差值与标准色差值进行比较，以判定屏幕在按压发黄检测中是否为合格产品。具体的，当色差值不大于标准色差值时，确定屏幕在按压发黄检测中为合格产品；当色差值大于标准色差值时，确定屏幕在按压发黄检测中为不合格产品。具体可以通过判定模块进行判定。本公开实施例提供的屏幕按压发黄判定方法中，通过获取按压测试时屏幕上多个测试点的色坐标，并对获取的多个色坐标进行处理，以得到色坐标中X值或Y值最大的测试点与色坐标中X值或Y值最小的测试点之间的色差值，然后将色差值与设定的标准色差值进行比较，以判定屏幕在按压发黄检测中是否为合格产品。相比于现有技术采用人工肉眼检测，本公开实施例提供的屏幕按压发黄判定方法，能够避免误判、漏判或过判现象出现，从而提高了屏幕按压发黄检测的准确率。
实际应用时，如图1B所示，上述步骤S1具体可以包括：
步骤S11、在按压测试前，沿屏幕的短边的方向等间距地选取多个测试点，多个测试点的数量为奇数个；结合图2A所示，在按压测试前，沿屏幕4的短边的方向等间距地选取九个测试点5(如图2A中倒数第三行虚线的矩形方框所示)。
步骤S12、获取按压测试前多个测试点的初始色坐标。
步骤S13、在按压测试过程中，屏幕的按压次数每间隔N千次，获取多个测试点的当前色坐标；具体地，上述屏幕的按压次数中的N可以为正整数，例如可以为“1”。
上述步骤S12和步骤S13具体可以结合图2B所示，获取按压测试前每个测试点5的初始色坐标，以及在按压测试过程中，屏幕4的按压次数每间隔“1”千次，获取每个测试点5的当前色坐标。
具体地，为了提高屏幕4按压发黄判定的准确性，可以沿屏幕4的长边的方向选取多组上述测试点5(如图2A中由上至下共有九组虚线的矩形方框所示)。
其中，为了更准确地得到色坐标中X值或Y值最大的测试点与色坐标中 X值或Y值最小的测试点之间的色差值，如图1C所示，上述步骤S2具体可以并列包括：
步骤S21、将多个测试点的初始色坐标中的X值生成第一比较图，或在同一按压次数下，将多个测试点的当前色坐标中的X值生成上述第一比较图；
步骤S21′、将多个测试点的初始色坐标中的Y值生成第二比较图，或在同一按压次数下，将多个测试点的当前色坐标中的Y值生成上述第二比较图。
上述步骤S21和步骤S21′具体可以结合图2C所示，将九个测试点5的初始色坐标中的X值和Y值生成比较图(该比较图可以为第一比较图和第二比较图合成所得)，或在同一按压次数下，将九个测试点5的当前色坐标中的X值和Y值生成上述比较图。例如图2C中所示可以为在第“5”千次按压次数下，九个测试点5的当前色坐标中的X值和Y值生成的比较图。
其中，第一比较图中，横轴为多个测试点的具体名称，以单位“1”为相邻两个测试点之间的距离。横轴的坐标分别为第一个测试点、第二个测试点、第三个测试点……第n个测试点(图中n＝9)。第一比较图中纵轴代表多个测试点的色坐标中的X值。类似地，由于图2C还整合了第二比较图，上述横轴坐标还适用于第二比较图，不过此时，纵轴代表多个测试点的所述色坐标中的Y值。
步骤S22、将第一比较图中色坐标中X值最小的测试点作为第一数据点；在第一比较图中，计算出将每个测试点的X值所对应的数据点与第一数据点之间连成的直线的第一斜率值。具体地，上述比较图中横轴可以为多个测试点、纵轴可以为色坐标的X值。色坐标中X值最小的测试点通常为沿屏幕的短边方向的中间位置的测试点。这是因为，在测试中，测试点多为中心位置，故该位置受压最大，形变最大，液晶量也最少，相应的色坐标也偏蓝。当然，色坐标中X值最小的测试点也可以为其它的点，例如如附图2C中所示。
步骤S22′、将第二比较图中色坐标中Y值最小的测试点作为第二数据点；在第二比较图中，计算出将每个测试点的Y值所对应的数据点与第二数据点之间连成的直线的第二斜率值。具体地，上述比较图中横轴可以为多个测试点、纵轴可以为色坐标的Y值。
上述步骤S22和步骤S22′具体可以结合图2C所示，将位于沿屏幕4的短边方向的中间位置的测试点5的色坐标中的X值作为第一数据点、Y值作为第二数据点。在比较图中，计算出将每个测试点5的X值与第一数据点之间连成的直线的第一斜率值、以及每个测试点5的Y值与第二数据点之间连成的直线的第二斜率值。由于通常位于沿屏幕4的短边方向的两侧位置的测试点5的色坐标较大，因此为了体现出屏幕4发黄的较大程度，图2C中只示意性地示出四条虚线，分别具有第一斜率值和第二斜率值。
如图1C所示，上述步骤S2具体还可以包括：步骤S23、比较多个第一斜率值的绝对值和/或第二斜率值的绝对值(显然左右两侧的斜率值是异号的)，将最大的第一斜率值的绝对值或第二斜率值的绝对值作为色坐标中X值或Y值最大的测试点与色坐标中X值或Y值最小的测试点之间的色差值。结合图2C所示，将图2C中两个第一斜率值的绝对值和两个第二斜率值的绝对值进行比较，将其中绝对值最大的一个第一斜率值或第二斜率值作为色坐标中X值或Y值最大的测试点5与色坐标中X值或Y值最小的测试点5之间的色差值。为了论述的方便，后文中所述的斜率值均指该斜率值的绝对值，而不考虑其符号。
上述步骤S3具体可以结合图2D所示，将计算后的最大的第一斜率值和/或第二斜率值与设定的标准色差值进行比较，本公开中以“0.5”作为设定的标准色差值，图2D中为不同按压次数下所对应的多个最大的第一斜率值和/或第二斜率值；当最大的第一斜率值和/或第二斜率值不大于标准色差值时，判定屏幕4在按压发黄检测中为合格产品，例如图2D中所示，截至第“5”千次按压时，屏幕4尚为发黄检测中的合格产品，但如果继续对屏幕4进行按压，则屏幕4很快将成为不合格产品。
为了进一步确定合格产品中屏幕的发黄程度，上述屏幕按压发黄判定方法还可以包括：在按压发黄检测合格的屏幕中，将色差值除以标准色差值，以计算后的商确定屏幕的发黄的程度等级。上述计算后的商越大，屏幕的发黄的程度越严重。
上述举例说明的判定方法只是本公开实施例提供的屏幕按压发黄判定方法的一种，还可以通过判断坐标图中各测试点的色坐标组成的类似抛物线的 曲率值来进行判定，具体过程与上述斜率值的判定相似，例如可以包括：获取按压测试时屏幕上多个测试点的色坐标；对获取的多个色坐标进行处理，以得到色坐标中X值或Y值最大的测试点的曲率值；将曲率值与设定的标准色差值进行比较，当曲率值不大于标准色差值时，判定屏幕在按压发黄检测中为合格产品。可见，本公开实施例中的色差值可以包括但不限于斜率值和曲率值等。
具体地，上述曲率值是指：将多个测试点的初始色坐标中的X值或Y值生成比较图，或在同一按压次数下，将多个测试点的当前色坐标中的X值或Y值生成比较图，比较图中横轴代表多个测试点的具体名称，以单位“1”为相邻两个所述测试点之间的距离，纵轴代表多个测试点的色坐标中的X值或Y值；将比较图中每个测试点的X值或每个测试点的Y值所对应的数据点连成抛物线，则抛物线上的每个数据点具有与之相对应的曲率值。
另外，也可以在屏幕4的长边的方向上任取一个检测点5，在不同的按压次数完成后获取该检测点5的色坐标，并将该色坐标与标准色坐标进行对比，从而判定屏幕4的发黄程度。
本公开实施例还提供一种屏幕按压发黄判定装置，如图3所示，包括：获取模块1，用于获取按压测试时屏幕上多个测试点的色坐标；处理模块2，用于对获取的多个色坐标进行处理，以得到色坐标中X值或Y值最大的测试点与色坐标中X值或Y值最小的测试点之间的色差值；判定模块3，用于将色差值与设定的标准色差值进行比较，以判定屏幕在按压发黄检测中是否为合格产品。
这里，获取模块可以为光学测试镜头，处理模块和判定模块可以为中央处理器等。
本公开实施例提供的屏幕按压发黄判定装置中，获取模块1能够获取按压测试时屏幕4上多个测试点5的色坐标，并将该色坐标发送给处理模块2；处理模块2能够对获取的多个色坐标进行处理，以得到色坐标中X值或Y值最大的测试点5与色坐标中X值或Y值最小的测试点5之间的色差值，并将该色差值发送给判定模块3；判定模块3能够将上述色差值与设定的标准色差值进行比较，以判定屏幕4在按压发黄检测中是否为合格产品。相比于现 有技术，由于本公开实施例提供的屏幕按压发黄判定装置，能够通过获取模块1、处理模块2和判定模块3的配合使用，准确地判断出屏幕4在按压发黄检测中是否为合格产品，从而避免了现有的人工肉眼检测所导致的误判、漏判或过判等误差，进而提高了屏幕4按压发黄检测的准确率。
其中，如图4所示，上述屏幕按压发黄判定装置可以包括：用于对屏幕4进行按压测试的压头机构11；设于压头机构11内的光学测试镜头12，该光学测试镜头12用于获取屏幕4上各测试点5的色坐标。具体地，该光学测试镜头12可以采用与显示器色彩分析仪CA-210中类似的镜头，但光学测试镜头12的测试精度及速度等需要优于CA-210。因此，获取模块1可以在屏幕4的按压测试中，随时通过屏幕按压发黄判定装置中内置的光学测试镜头12获取压头机构11下端的屏幕4上测试点5的色坐标，并发送给处理模块2。
为了提高屏幕按压发黄判定装置的精准度，上述压头机构11的按压端(如图4中虚线箭头所指)，可以优选为采用光学耐磨玻璃材质，从而既能够保证按压测试的正常进行，又能够使压头机构11中内置的光学测试镜头12有较好的光学测量效果。
本公开实施例提供的屏幕按压发黄判定方法及判定装置，能够解决现有的人工肉眼检测是在屏幕按压测试结束后进行的不及时性问题，以及无法准确判断出屏幕是在按压多少次时出现发黄所导致的不合格的问题。本公开实施例提供的屏幕按压发黄判定方法及判定装置，能够在按压测试过程中对屏幕周边发黄不良进行有效地判断，从而避免人工肉眼判断所导致的误差和不及时性，简单易实现。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (12)

  1. 一种屏幕按压发黄判定方法，包括：
    获取按压测试时所述屏幕上多个测试点的色坐标；
    对获取的多个所述色坐标进行处理，以得到所述色坐标中X值或Y值最大的所述测试点与所述色坐标中X值或Y值最小的所述测试点之间的色差值；
    将所述色差值与设定的标准色差值进行比较，以判定所述屏幕在按压发黄检测中是否为合格产品。
  2. 根据权利要求1所述的屏幕按压发黄判定方法，其中，获取按压测试时所述屏幕上多个测试点的色坐标的步骤具体包括：
    在按压测试前，沿所述屏幕的短边的方向等间距地选取多个所述测试点，多个所述测试点的数量为奇数个；
    获取按压测试前多个所述测试点的初始色坐标；
    在所述按压测试过程中，所述屏幕的按压次数每间隔N千次，获取多个所述测试点的当前色坐标，其中，N为正整数。
  3. 根据权利要求2所述的屏幕按压发黄判定方法，其中，对获取的多个所述色坐标进行处理，以得到所述色坐标中X值或Y值最大的所述测试点与所述色坐标中X值或Y值最小的所述测试点之间的色差值的步骤具体包括：
    将多个所述测试点的所述初始色坐标中的X值生成第一比较图，或在同一按压次数下，将多个所述测试点的所述当前色坐标中的X值生成所述第一比较图；
    所述第一比较图中横轴代表多个所述测试点的具体名称，以单位“1”为相邻两个所述测试点之间的距离，所述第一比较图的横轴中的“1”为第一个所述测试点、“2”为第二个所述测试点、“3”为第三个所述测试点……“n”为第n个所述测试点；所述第一比较图中纵轴代表多个所述测试点的所述色坐标中的X值；
    将所述第一比较图中所述色坐标中X值最小的所述测试点作为第一数据点；在所述第一比较图中，计算出将每个所述测试点的X值所对应的数据点与所述第一数据点之间连成的直线的第一斜率值；
    比较多个所述第一斜率值的绝对值，将最大的所述第一斜率值的绝对值作为所述色坐标中X值最大的所述测试点与所述色坐标中X值最小的所述测试点之间的所述色差值。
  4. 根据权利要求3所述的屏幕按压发黄判定方法，其中，对获取的多个所述色坐标进行处理，以得到所述色坐标中X值或Y值最大的所述测试点与所述色坐标中X值或Y值最小的所述测试点之间的色差值的步骤具体包括：
    将多个所述测试点的所述初始色坐标中的Y值生成第二比较图，或在同一按压次数下，将多个所述测试点的所述当前色坐标中的Y值生成所述第二比较图；
    所述第二比较图中横轴代表多个所述测试点的具体名称，以单位“1”为相邻两个所述测试点之间的距离，所述第二比较图的横轴中的“1”为第一个所述测试点、“2”为第二个所述测试点、“3”为第三个所述测试点……“n”为第n个所述测试点；所述第二比较图中纵轴代表多个所述测试点的所述色坐标中的Y值；
    将所述第二比较图中所述色坐标中Y值最小的所述测试点作为第二数据点；在所述第二比较图中，计算出将每个所述测试点的Y值所对应的数据点与所述第二数据点之间连成的直线的第二斜率值；
    比较多个所述第二斜率值的绝对值，将最大的所述第二斜率值的绝对值作为所述色坐标中Y值最大的所述测试点与所述色坐标中Y值最小的所述测试点之间的所述色差值。
  5. 根据权利要求4所述的屏幕按压发黄判定方法，其中，将最大的所述第一斜率值的绝对值与设定的标准色差值进行比较，当最大的所述第一斜率值的绝对值不大于所述标准色差值时，判定所述屏幕在按压发黄检测中为合格产品；和/或
    将最大的所述第二斜率值的绝对值与设定的标准色差值进行比较，当最大的所述第二斜率值的绝对值不大于所述标准色差值时，判定所述屏幕在按压发黄检测中为合格产品。
  6. 根据权利要求2所述的屏幕按压发黄判定方法，其中，对获取的多个所述色坐标进行处理，以得到所述色坐标中X值或Y值最大的所述测试点与所 述色坐标中X值或Y值最小的所述测试点之间的色差值的步骤具体包括：
    将多个所述测试点的所述初始色坐标中的X值生成第一比较图，或在同一按压次数下，将多个所述测试点的当前色坐标中的X值生成所述第一比较图；
    所述第一比较图中横轴代表多个所述测试点的具体名称，以单位“1”为相邻两个所述测试点之间的距离，所述第一比较图的横轴中的“1”为第一个所述测试点、“2”为第二个所述测试点、“3”为第三个所述测试点……“n”为第n个所述测试点；所述第一比较图的纵轴代表多个所述测试点的所述色坐标中的X值；
    将所述第一比较图中每个测试点的X值所对应的数据点连成抛物线，则抛物线上的每个数据点具有与之相对应的曲率值；
    计算色坐标中X值最大的测试点的第一曲率值，将该第一曲率值作为所述色差值。
  7. 根据权利要求6所述的屏幕按压发黄判定方法，其中，对获取的多个所述色坐标进行处理，以得到所述色坐标中X值或Y值最大的所述测试点与所述色坐标中X值或Y值最小的所述测试点之间的色差值的步骤具体包括：
    将多个所述测试点的所述初始色坐标中的Y值生成第二比较图，或在同一按压次数下，将多个所述测试点的当前色坐标中的Y值生成所述第二比较图；
    所述第二比较图中横轴代表多个所述测试点的具体名称，以单位“1”为相邻两个所述测试点之间的距离，所述第二比较图的横轴中的“1”为第一个所述测试点、“2”为第二个所述测试点、“3”为第三个所述测试点……“n”为第n个所述测试点；所述第二比较图的纵轴代表多个所述测试点的所述色坐标中的Y值；
    将所述第二比较图中每个测试点的Y值所对应的数据点连成抛物线，则抛物线上的每个数据点具有与之相对应的曲率值；
    计算色坐标中Y值最大的测试点的第二曲率值，将该第二曲率值作为所述色差值。
  8. 根据权利要求7所述的屏幕按压发黄判定方法，其中，将所述色差值 与设定的标准色差值进行比较，以判定所述屏幕在按压发黄检测中是否为合格产品的步骤包括：
    将所述第一或第二曲率值与设定的标准色差值进行比较，当曲率值不大于标准色差值时，判定屏幕在按压发黄检测中为合格产品。
  9. 根据权利要求5或8所述的屏幕按压发黄判定方法，其中，屏幕按压发黄判定方法还包括：
    在所述按压发黄检测合格的所述屏幕中，将所述色差值除以所述标准色差值，以计算后的商确定所述屏幕的发黄的程度等级。
  10. 一种屏幕按压发黄判定装置，包括：
    获取模块，用于获取按压测试时所述屏幕上多个测试点的色坐标；
    处理模块，用于对获取的多个所述色坐标进行处理，以得到所述色坐标中X值或Y值最大的所述测试点与所述色坐标中X值或Y值最小的所述测试点之间的色差值；
    判定模块，用于将所述色差值与设定的标准色差值进行比较，以判定所述屏幕在按压发黄检测中是否为合格产品。
  11. 根据权利要求10所述的屏幕按压发黄判定装置，还包括：
    用于对所述屏幕进行所述按压测试的压头机构；
    设于所述压头机构内的光学测试镜头，所述光学测试镜头用于获取所述屏幕上各所述测试点的所述色坐标。
  12. 根据权利要求10所述的屏幕按压发黄判定装置，其中，所述压头机构的按压端采用光学耐磨玻璃材质。
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