WO2014101304A1 - 显示面板的缺陷检测方法及其检测装置 - Google Patents

显示面板的缺陷检测方法及其检测装置 Download PDF

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Publication number
WO2014101304A1
WO2014101304A1 PCT/CN2013/070005 CN2013070005W WO2014101304A1 WO 2014101304 A1 WO2014101304 A1 WO 2014101304A1 CN 2013070005 W CN2013070005 W CN 2013070005W WO 2014101304 A1 WO2014101304 A1 WO 2014101304A1
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Prior art keywords
display panel
light
grayscale
defect
gray scale
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PCT/CN2013/070005
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English (en)
French (fr)
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林勇佑
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深圳市华星光电技术有限公司
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Priority to US13/809,007 priority Critical patent/US8908170B2/en
Publication of WO2014101304A1 publication Critical patent/WO2014101304A1/zh

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    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G01N2021/8845—Multiple wavelengths of illumination or detection
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
    • G01N2021/9513—Liquid crystal panels

Definitions

  • the present invention relates to the field of display panel detection technologies, and in particular, to a defect detection method for a display panel and a detection device thereof.
  • the display panel is generally illuminated by white light, and a corresponding gray scale map is acquired, and then whether the display panel has a defect is determined according to whether a gray scale difference occurs in the gray scale map.
  • some types of defects are small in the gray scale of the corresponding gray scale image when the white light is illuminated on the display panel, it is not easy to distinguish, so the optical defect inspection machine is extremely easy to miss detection, thereby reducing the defect detection capability of the display panel.
  • the technical problem to be solved by the present invention is to provide a defect detecting method for a display panel and a detecting device thereof, so as to improve the defect detecting capability of the optical defect inspection machine on the display panel and prevent missed detection.
  • another technical solution adopted by the present invention is to provide a defect detecting method for a display panel, comprising: sequentially illuminating a display panel using red light, green light, and blue light; and acquiring a display panel in red light and green light Corresponding three pixel electrode images when irradiated with blue light; corresponding to the first gray scale map, the second gray scale map, and the third gray scale map when the display panel is illuminated by red, green, and blue light according to the three pixel electrode images Determining whether the display panel has a defect, and if the gray scale difference occurs in the first gray scale map, the second gray scale map, and the third gray scale map, it is determined that the display panel has a defect.
  • the detecting method further includes: illuminating the display panel with white light; acquiring a fourth grayscale image of the display panel when the white light is illuminated; determining whether the display panel has a defect according to the fourth grayscale image; and if the fourth grayscale image does not exhibit grayscale In the difference, it is determined that the display panel does not have a defect, and the step of sequentially illuminating the display panel using red light, green light, and blue light is performed.
  • the step of determining whether the display panel has a defect according to the fourth gray-scale diagram further comprises: if the gray-scale difference occurs in the fourth gray-scale diagram, determining that the display panel has a defect.
  • another technical solution adopted by the present invention is to provide a defect detecting method for a display panel, comprising: sequentially illuminating a display panel using light of a plurality of different colors; and acquiring light of the display panel in a plurality of different colors.
  • a defect detecting method for a display panel comprising: sequentially illuminating a display panel using light of a plurality of different colors; and acquiring light of the display panel in a plurality of different colors.
  • the step of obtaining a plurality of grayscale maps of the display panel when the plurality of different colors are irradiated includes: obtaining, by photographing, a corresponding pixel electrode image when the display panel is irradiated with light of a plurality of different colors; according to the pixel electrode The image acquires a corresponding plurality of grayscale maps.
  • the light of different colors is red light, green light and blue light
  • the display panel corresponds to the first gray scale map, the second gray scale map and the third gray scale map when the red light, the green light and the blue light are illuminated.
  • the detecting method further includes: illuminating the display panel with white light; acquiring a fourth grayscale image of the display panel when the white light is illuminated; determining whether the display panel has a defect according to the fourth grayscale image; and if the fourth grayscale image does not exhibit grayscale In the difference, it is determined that the display panel does not have a defect, and the step of sequentially illuminating the display panel using red light, green light, and blue light is performed.
  • the step of determining whether the display panel has a defect according to the fourth gray-scale diagram further comprises: if the gray-scale difference occurs in the fourth gray-scale diagram, determining that the display panel has a defect.
  • a defect detecting device for a display panel comprising: a light source module, respectively illuminating the display panel with light of different colors; acquiring a module to obtain a display panel in the light source module When using different colors of light to illuminate, corresponding to a plurality of gray scale maps; the processing module determines whether the display panel has defects according to the plurality of gray scale maps acquired by the acquisition module, and if the gray scale differences of the plurality of gray scale diagrams appear, the determination display The panel has defects.
  • the detecting device further includes a shooting module, wherein the capturing module is configured to capture a pixel electrode image corresponding to the light of the different colors of the display panel, and the acquiring module acquires a corresponding grayscale image according to the pixel electrode image acquired by the capturing module.
  • the light of different colors is red light, green light and blue light
  • the display panel corresponds to the first gray scale map, the second gray scale map and the third gray scale map when the red light, the green light and the blue light are illuminated.
  • the light source module is further configured to illuminate the display panel with white light, and the photographing module acquires the pixel electrode image of the display panel when the white light is irradiated, and the acquiring module acquires the corresponding fourth gray scale image according to the pixel electrode image when the white light is irradiated by the photographing module.
  • the processing module determines whether the display panel has a defect according to the fourth grayscale diagram. If the grayscale difference does not appear in the fourth grayscale diagram, the processing module determines that the display panel does not have a defect, and if the fourth grayscale diagram has a grayscale difference, Then the processing module determines that the display panel has a defect.
  • the invention has the beneficial effects that the present invention sequentially illuminates the display panel by using a plurality of different colors of light, and acquires corresponding gray scale maps, thereby determining gray scale differences according to the gray scale map and detecting the display panel having defects.
  • the invention can improve the defect detection capability of the optical defect inspection machine on the display panel and prevent the missed detection.
  • FIG. 1 is a schematic flow chart of an embodiment of a defect detecting method for a display panel of the present invention
  • FIG. 2 is a schematic diagram showing a first step of defect detection of a display panel according to an embodiment of the invention
  • FIG. 3 is a schematic diagram showing a second step of defect detection of a display panel according to an embodiment of the invention.
  • FIG. 4 is a schematic diagram showing a third step of defect detection of a display panel according to an embodiment of the invention.
  • 5 is a gray scale diagram showing normal gray scales of a panel when illuminated by red, green, and blue light;
  • FIG. 6 is a gray scale diagram showing gray scale differences of a panel when irradiated with red light, green light, and blue light;
  • FIG. 7 is a schematic flow chart of another embodiment of a defect detecting method of a display panel of the present invention.
  • FIG. 8 is a gray scale diagram showing a gray scale difference of a panel when irradiated with white light
  • Fig. 9 is a flow chart showing an embodiment of a defect detecting device for a display panel of the present invention.
  • the invention provides a defect detecting method for a display panel and a detecting device thereof.
  • the defect detecting method of the present invention sequentially illuminates the display panel by using a plurality of different colors of light, and acquires corresponding gray scale maps, and then determines gray scale differences according to the gray scale map and detects defects.
  • the defects include display defects of pixel particle shedding, uneven pixel distribution, water residue and ITO residue, and the gray-scale reaction of each type of defect when the light of different colors is illuminated on the display panel is different.
  • FIG. 1 is a schematic flow chart of an embodiment of a defect detecting method for a display panel of the present invention. As shown in FIG. 1, the detection method of this embodiment includes the following steps:
  • Step S101 sequentially using a plurality of different colors of light to illuminate the display panel
  • FIG. 2, 3 and 4 are schematic diagrams showing defect detection of a display panel according to an embodiment of the present invention.
  • the optical defect inspection machine (SCAN optical machine) 230 starts to work and emits light of different colors.
  • the display panel 210 is sequentially illuminated.
  • the lights of different colors are red light, green light, and blue light. In other embodiments, light of any two of the three or other colors may be used as long as at least two different colors of light are satisfied. Further, in the present invention, the order of irradiation of light of different colors is not limited, and they may be arranged at will.
  • Step S102 Acquire a plurality of gray scale maps corresponding to the display panel when the plurality of different colors of light are illuminated;
  • Figure 5 is a gray scale diagram of the display panel when illuminated by red, green, and blue light.
  • the optical defect inspection machine 230 emits red light to illuminate the display panel 210, and then the detecting person or the conveying device moves the display panel 210 in the direction indicated by the arrow a to meet the detection request. .
  • the imaging device (not shown) disposed on the detection platform 220, such as a CCD camera, captures a first pixel electrode image corresponding to the display panel 210 when the red light is irradiated, and then according to the first pixel electrode.
  • the image acquires a corresponding first grayscale map 510.
  • the optical defect inspection machine 230 emits green light to illuminate the display panel 210, and then moves the display panel 210 in a direction indicated by an arrow b opposite to the direction indicated by the arrow a.
  • the photographing device acquires the second pixel electrode image corresponding to the display panel 210 when the green light is irradiated, and then acquires the corresponding second gray scale map 520 according to the second pixel electrode image.
  • the optical defect inspection machine 230 emits a blue light to illuminate the display panel 210, and then moves the display panel 210 in a direction indicated by an arrow c opposite to the direction indicated by the arrow b.
  • the photographing device acquires a third pixel electrode image corresponding to the display panel 210 when the blue light is irradiated, and then acquires a corresponding third gray scale map 530 according to the third pixel electrode image.
  • the corresponding first grayscale image 510 and the second may be acquired.
  • Grayscale map 520 and third grayscale map 530 The specific process and principle of obtaining a grayscale image from the pixel electrode image can be referred to the prior art, and the present invention will not be described again.
  • the order of sequentially illuminating the display panel 210 for red, green, and blue light can be adjusted, and is not limited to the embodiment.
  • Step S103 determining whether the display panel has a defect, and if a grayscale difference occurs in the plurality of grayscale maps, determining that the display panel has a defect.
  • the green light as shown in FIG. If the gray scale difference occurs in the second gray scale diagram 520, it is determined that the display panel 210 has a defect, and the defect is determined to be water residue according to the specific condition of the gray scale difference; if the gray scale difference does not appear in the three, the display panel is determined. 210 has no defects and meets the display requirements.
  • the present embodiment sequentially illuminates the display panel by using red, green, and blue light, and acquires corresponding first grayscale map 510, second grayscale map 520, and third grayscale map 530, and then according to the three Whether or not the gray scale difference occurs to determine and detect whether or not the display panel has a defect, it is possible to improve the defect detecting capability of the optical defect inspection machine 230 on the display panel to prevent the missing detection.
  • FIG. 7 is a flow chart showing another embodiment of a defect detecting method of a display panel of the present invention. As shown in FIG. 7, the main difference between the detecting method of the present embodiment and the embodiment shown in FIG. 1 is whether the white light is first used for defect detection. In detail, the following steps are included:
  • Step 710 Illuminating the display panel with white light
  • Step 720 Acquire a fourth grayscale diagram of the display panel when the white light is illuminated
  • Step 730 Determine, according to the fourth grayscale diagram, whether the display panel has a defect
  • step S740 If the gray scale difference does not appear in the fourth grayscale diagram, it is determined that the display panel does not have a defect, then proceed to step S740;
  • Step S740 sequentially using a plurality of different colors of light to illuminate the display panel
  • Step S750 Acquire a plurality of gray scale diagrams corresponding to the display panel when the plurality of different colors of light are illuminated;
  • Step S760 determining whether the display panel has a defect. If a grayscale difference occurs in the plurality of grayscale maps, it is determined that the display panel has a defect, and the detection ends.
  • the display panel is illuminated by first selecting white light to illuminate the display panel, and then the light of different colors such as red light, green light, and blue light is sequentially illuminated.
  • the main principle is: gray scale of the display panel obtained after white light illumination.
  • the figure shown in Figure 8) can detect general defects such as pixel particle shedding and uneven pixel distribution, and then use different colors of light to detect specific defects such as water residue and ITO residue.
  • the defect detection of the display panel is first performed by using white light irradiation, and the detection of the red, green, and blue light is performed on the detected display panel, thereby improving the defect detection capability of the optical defect inspection machine on the display panel. Missed inspection.
  • Fig. 9 is a flow chart showing an embodiment of a defect detecting device for a display panel of the present invention.
  • the defect detecting apparatus 900 of the present embodiment includes a light source module 910 , a photographing module 920 , an obtaining module 930 , and a processing module 940 .
  • the light source module 910 illuminates the display panel 950 with light of different colors, respectively.
  • the light of different colors in this embodiment is red light, green light, and blue light.
  • the photographing module 920 is configured to capture a pixel electrode image corresponding to the display panel 950 when the red, green, and blue lights are illuminated.
  • the obtaining module 930 is configured to obtain a corresponding first grayscale map, second grayscale map, and third grayscale map according to the pixel electrode image acquired by the capturing module 920.
  • the processing module 940 is configured to determine, according to the first grayscale map, the second grayscale map, and the third grayscale map acquired by the obtaining module 930, whether the display panel 950 has a defect, if at least one of the three grayscale graphs is grayed out The difference in the order determines that the display panel 950 has a defect.
  • the light source module 910 firstly illuminates the display panel 950 with white light, and the imaging module 920 acquires a pixel electrode image of the display panel 950 when the white light is illuminated, and the acquisition module 930 acquires the image according to the imaging module 920.
  • the pixel electrode image at the time of white light illumination acquires a corresponding fourth grayscale image, and the processing module 940 determines whether the display panel 950 has a defect according to the fourth grayscale image. If the grayscale difference does not appear in the fourth grayscale image, the processing module 940 determines The display panel 950 does not have a defect. If the gray scale difference occurs in the fourth gray scale image, the processing module determines that the display panel 950 has a defect, and no longer uses light of other colors to illuminate the display panel 950 for defect detection.
  • the present invention sequentially illuminates the display panel by using a plurality of different colors of light, and acquires corresponding gray scale maps, and then determines gray scale differences according to the gray scale map and detects the display panel having defects.
  • the invention can improve the defect detection capability of the optical defect inspection machine on the display panel and prevent the missed detection.

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Abstract

一种显示面板的缺陷检测方法及其检测装置，该检测方法包括：使用多种不同颜色的光，优选是红光、绿光和蓝光，依次照射显示面板（S101）；获取显示面板在多种不同颜色的光照射时，对应的多个灰阶图（S102）；判断显示面板是否具有缺陷，若多个灰阶图出现灰阶差异，则判定显示面板具有缺陷（S103）。上述方式优选是针对显示面板的像素电极进行成像。通过上述方式能够提升光学缺陷检查机对显示面板的缺陷检测能力，防止漏检。

Description

显示面板的缺陷检测方法及其检测装置
【技术领域】
本发明涉及显示面板检测技术领域，具体而言涉及一种显示面板的缺陷检测方法及其检测装置。
【背景技术】
随着时代的发展，高品质图像显示的液晶显示面板已变得越来越流行。然而根据现有的显示面板的制造技术，完全避免显示缺陷的发生是十分困难也是不现实的，因此在显示面板的制造工序中，对显示面板进行显示缺陷检查的工序是十分必要的。
现有技术中，一般采用白光照射显示面板，并获取对应的灰阶图，继而根据灰阶图是否出现灰阶差异来判定显示面板是否具有缺陷。然而，由于某些类型的缺陷在白光照射显示面板时对应灰阶图的灰阶差异较小，不容易分辨，因此光学缺陷检查机极易漏检，从而降低对显示面板的缺陷检测能力。
综上所述，有必要提供一种显示面板的缺陷检测方法及其检测装置，以解决上述问题。
【发明内容】
本发明主要解决的技术问题是提供一种显示面板的缺陷检测方法及其检测装置，以提升光学缺陷检查机对显示面板的缺陷检测能力，防止漏检。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种显示面板的缺陷检测方法，包括：使用红光、绿光和蓝光依次照射显示面板；获取显示面板在红光、绿光和蓝光照射时，对应的三个像素电极图像；根据三个像素电极图像获取显示面板在红光、绿光和蓝光照射时对应第一灰阶图、第二灰阶图和第三灰阶图；判断显示面板是否具有缺陷，若第一灰阶图、第二灰阶图和第三灰阶图出现灰阶差异，则判定显示面板具有缺陷。
其中，检测方法进一步包括：使用白光照射显示面板；获取显示面板在白光照射时的第四灰阶图；根据第四灰阶图判断显示面板是否具有缺陷；若第四灰阶图未出现灰阶差异，则判定显示面板不具有缺陷，并进行使用红光、绿光以及蓝光依次照射显示面板的步骤。
其中，根据第四灰阶图判断显示面板是否具有缺陷的步骤还包括：若第四灰阶图出现灰阶差异，则判定显示面板具有缺陷。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种显示面板的缺陷检测方法，包括：使用多种不同颜色的光依次照射显示面板；获取显示面板在多种不同颜色的光照射时，对应的多个灰阶图；判断显示面板是否具有缺陷，若多个灰阶图出现灰阶差异，则判定显示面板具有缺陷。
其中，获取显示面板在多种不同颜色的光照射时，对应的多个灰阶图的步骤包括：通过拍摄获取显示面板在多种不同颜色的光照射时，对应的像素电极图像；根据像素电极图像获取对应的多个灰阶图。
其中，不同颜色的光是红光、绿光和蓝光，显示面板在红光、绿光和蓝光照射时对应第一灰阶图、第二灰阶图和第三灰阶图。
其中，检测方法进一步包括：使用白光照射显示面板；获取显示面板在白光照射时的第四灰阶图；根据第四灰阶图判断显示面板是否具有缺陷；若第四灰阶图未出现灰阶差异，则判定显示面板不具有缺陷，并进行使用红光、绿光以及蓝光依次照射显示面板的步骤。
其中，根据第四灰阶图判断显示面板是否具有缺陷的步骤还包括：若第四灰阶图出现灰阶差异，则判定显示面板具有缺陷。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种显示面板的缺陷检测装置，包括：光源模块，分别使用不同颜色的光照射显示面板；获取模块，获取显示面板在光源模块使用不同颜色的光照射时，对应多个灰阶图；处理模块，根据获取模块获取的多个灰阶图，判断显示面板是否具有缺陷，若多个灰阶图出现灰阶差异，则判定显示面板具有缺陷。
其中，检测装置还包括拍摄模块，拍摄模块用于拍摄获取显示面板在不同颜色的光照射时对应的像素电极图像，获取模块根据拍摄模块获取的像素电极图像获取对应的灰阶图。
其中，不同颜色的光是红光、绿光和蓝光，显示面板在红光、绿光和蓝光照射时对应第一灰阶图、第二灰阶图和第三灰阶图。
其中，光源模块进一步用于使用白光照射显示面板，拍摄模块获取显示面板在白光照射时的像素电极图像，获取模块根据拍摄模块获取的白光照射时的像素电极图像获取对应的第四灰阶图。
其中，处理模块根据第四灰阶图判断显示面板是否具有缺陷，若第四灰阶图未出现灰阶差异，则处理模块判定显示面板不具有缺陷，若第四灰阶图出现灰阶差异，则处理模块判定显示面板具有缺陷。
本发明的有益效果是：本发明通过使用多种不同颜色的光依次照射显示面板，并获取对应的多个灰阶图，进而根据灰阶图出现灰阶差异判定并检测具有缺陷的显示面板。本发明能够提升光学缺陷检查机对显示面板的缺陷检测能力，防止漏检。
【附图说明】
图1是本发明显示面板的缺陷检测方法一实施例的流程示意图；
图2是本发明一实施例的显示面板的缺陷检测第一步骤示意图；
图3是本发明一实施例的显示面板的缺陷检测第二步骤示意图；
图4是本发明一实施例的显示面板的缺陷检测第三步骤示意图；
图5是显示面板在红光、绿光和蓝光照射时的灰阶正常的灰阶图；
图6是显示面板在红光、绿光和蓝光照射时的灰阶差异的灰阶图；
图7是本发明显示面板的缺陷检测方法另一实施例的流程示意图；
图8是显示面板在白光照射时的灰阶差异的灰阶图；
图9是本发明显示面板的缺陷检测装置一实施例的流程示意图。
【具体实施方式】
本发明提供一种显示面板的缺陷检测方法及其检测装置。具体而言，本发明的缺陷检测方法主要通过使用多种不同颜色的光依次照射所述显示面板，并获取对应的多个灰阶图，进而根据灰阶图出现灰阶差异判定并检测具有缺陷的显示面板。其中，缺陷包括像素粒子脱落、像素分布不均匀、水残和ITO残等类型的显示缺陷，并且各个类型的缺陷在不同颜色的光照射显示面板时的灰阶反应不相同。
下面结合附图和实施例对本发明进行详细说明。
图1是本发明显示面板的缺陷检测方法一实施例的流程示意图。如1图所示，本实施例的检测方法包括以下步骤：
步骤S101：使用多种不同颜色的光依次照射显示面板；
图2、图3和图4是本发明一实施例的显示面板的缺陷检测示意图。结合图2、图3和图4所示，在本实施例中，将待检测的显示面板210上载至检测平台220后，光学缺陷检查机（SCAN光机）230开始工作并发出不同颜色的光依次照射显示面板210。
在本实施例中，为节约成本以及最大程度的提高对显示面板的缺陷检测能力，优选不同颜色的光是红光、绿光和蓝光。在其他实施例中，也可以使用三者中的任意两种或其他颜色的光，只要满足至少两种不同颜色的光即可。并且，在本发明中，并不限定不同颜色的光的照射顺序，可随意排列。
步骤S102：获取显示面板在多种不同颜色的光照射时，对应的多个灰阶图；
图5是显示面板在红光、绿光和蓝光照射时的灰阶图。参阅图2和图5，在本实施例中，光学缺陷检查机230发出红光照射显示面板210，而后检测人员或传送装置沿箭头a所示方向、以满足检测要求的移动速度移动显示面板210。
在显示面板210移动的同时，设置于检测平台220的拍摄装置（图未视），例如CCD摄像机，拍摄获取显示面板210在红光照射时对应的第一像素电极图像，继而根据第一像素电极图像获取对应的第一灰阶图510。
参阅图3和图5，在获取第一灰阶图510后，光学缺陷检查机230发出绿光照射显示面板210，而后沿与箭头a所示方向相反的箭头b所示方向移动显示面板210。同时，拍摄装置获取显示面板210在绿光照射时对应的第二像素电极图像，继而根据第二像素电极图像获取对应的第二灰阶图520。
参阅图4和图5，在获取第二灰阶图520后，光学缺陷检查机230发出蓝光照射显示面板210，而后沿与箭头b所示方向相反的箭头c所示方向移动显示面板210。同时，拍摄装置获取显示面板210在蓝光照射时对应的第三像素电极图像，继而根据第三像素电极图像获取对应的第三灰阶图530。
值得注意的是，在本发明的其他实施例中，也可以在获取第一像素电极图像、第二像素电极图像和第三像素电极图像后，再获取对应的第一灰阶图510、第二灰阶图520和第三灰阶图530。其中，由像素电极图像获取灰阶图的具体过程和原理，可参照现有技术，本发明不再赘述。另外，对于红光、绿光和蓝光的先后照射显示面板210的顺序，可以调整，并不仅限于本实施例所示。
步骤S103：判断显示面板是否具有缺陷，若多个灰阶图出现灰阶差异，则判定显示面板具有缺陷。
在本实施例中，若第一灰阶图510、第二灰阶图520和第三灰阶图530三者中至少一个出现灰阶差异，如图6所示的绿光照射显示面板时的第二灰阶图520出现灰阶差异，则判定显示面板210具有缺陷，并且根据灰阶差异的具体状况还可以判定此缺陷为水残；若三者均未出现灰阶差异，则判定显示面板210不具有缺陷，满足显示要求。
综上，本实施例通过使用红光、绿光和蓝光依次照射显示面板，并获取对应的第一灰阶图510、第二灰阶图520和第三灰阶图530，进而根据三者中是否出现灰阶差异来判定并检测显示面板是否具有缺陷，因此能够提升光学缺陷检查机230对显示面板的缺陷检测能力，防止漏检。
图7是本发明显示面板的缺陷检测方法另一实施例的流程示意图。如图7所示，本实施例的检测方法与图1所示实施例的主要区别在于是否首先使用白光进行缺陷检测。详细而言，包括以下步骤：
步骤710：使用白光照射显示面板；
步骤720：获取显示面板在白光照射时的第四灰阶图；
步骤730：根据第四灰阶图判断显示面板是否具有缺陷；
若第四灰阶图出现灰阶差异，则判定显示面板具有缺陷，此时即没有必要再使用不同颜色的光照射显示面板，进行缺陷的检测。
若第四灰阶图未出现灰阶差异，则判定显示面板不具有缺陷，则进行步骤S740；
步骤S740：使用多种不同颜色的光依次照射显示面板；
步骤S750：获取显示面板在多种不同颜色的光照射时，对应的多个灰阶图；
步骤S760：判断显示面板是否具有缺陷，若多个灰阶图出现灰阶差异，则判定显示面板具有缺陷，此次检测结束。
在本实施例中，对于首先选择白光照射显示面板，而后再进行红光、绿光和蓝光等不同颜色的光依次照射显示面板，其主要原理是：经过白光照射时获取的显示面板的灰阶图（如图8所示）可以检测出像素粒子脱落和像素分布不均匀等类型的一般性缺陷，而后再使用不同颜色的光检测出水残和ITO残等类型的特殊性缺陷。
本实施例首先使用白光照射进行显示面板的缺陷检测，再对检测后的显示面板进行红光、绿光和蓝光的照射检测，因此同样能够提升光学缺陷检查机对显示面板的缺陷检测能力，防止漏检。
图9是本发明显示面板的缺陷检测装置一实施例的流程示意图。如图9所示，本实施例的缺陷检测装置900包括：光源模块910、拍摄模块920、获取模块930以及处理模块940。
在本实施例中，光源模块910分别使用不同颜色的光照射显示面板950。其中，本实施例优选不同颜色的光是红光、绿光和蓝光。
拍摄模块920用于拍摄获取显示面板950在红光、绿光和蓝光照射时对应的像素电极图像。
获取模块930用于根据拍摄模块920获取的像素电极图像获取对应的第一灰阶图、第二灰阶图和第三灰阶图。
处理模块940用于根据获取模块930获取的第一灰阶图、第二灰阶图和第三灰阶图，判断显示面板950是否具有缺陷，若所述三个灰阶图中至少一个出现灰阶差异，则判定显示面板950具有缺陷。
此外应理解，在本发明的另一实施例中，光源模块910首先使用白光照射显示面板950，拍摄模块920获取显示面板950在白光照射时的像素电极图像，获取模块930根据拍摄模块920获取的白光照射时的像素电极图像获取对应的第四灰阶图，处理模块940根据第四灰阶图判断显示面板950是否具有缺陷，若第四灰阶图未出现灰阶差异，则处理模块940判定显示面板950不具有缺陷，若第四灰阶图出现灰阶差异，则处理模块判定显示面板950具有缺陷，不再使用其他颜色的光照射显示面板950进行缺陷检测。
综上所述，本发明通过使用多种不同颜色的光依次照射显示面板，并获取对应的多个灰阶图，进而根据灰阶图出现灰阶差异判定并检测具有缺陷的显示面板。本发明能够提升光学缺陷检查机对显示面板的缺陷检测能力，防止漏检。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (13)

  1. 一种显示面板的缺陷检测方法，其中，所述检测方法包括：
    使用红光、绿光和蓝光依次照射所述显示面板；
    获取所述显示面板在所述红光、绿光和蓝光照射时，对应的三个像素电极图像；
    根据所述三个像素电极图像获取所述显示面板在所述红光、绿光和蓝光照射时对应第一灰阶图、第二灰阶图和第三灰阶图；
    判断所述显示面板是否具有缺陷，若所述第一灰阶图、第二灰阶图和第三灰阶图出现灰阶差异，则判定所述显示面板具有缺陷。
  2. 根据权利要求1所述的检测方法，其中，所述检测方法进一步包括：
    使用白光照射所述显示面板；
    获取所述显示面板在白光照射时的第四灰阶图；
    根据所述第四灰阶图判断所述显示面板是否具有缺陷；
    若所述第四灰阶图未出现灰阶差异，则判定所述显示面板不具有缺陷，并进行使用红光、绿光以及蓝光依次照射所述显示面板的步骤。
  3. 根据权利要求2所述的检测方法，其中，所述根据所述第四灰阶图判断所述显示面板是否具有缺陷的步骤还包括：
    若所述第四灰阶图出现灰阶差异，则判定所述显示面板具有缺陷。
  4. 一种显示面板的缺陷检测方法，其中，所述检测方法包括：
    使用多种不同颜色的光依次照射所述显示面板；
    获取所述显示面板在所述多种不同颜色的光照射时，对应的多个灰阶图；
    判断所述显示面板是否具有缺陷，若所述多个灰阶图出现灰阶差异，则判定所述显示面板具有缺陷。
  5. 根据权利要求4所述的检测方法，其中，所述获取所述显示面板在所述多种不同颜色的光照射时，对应的多个灰阶图的步骤包括：
    通过拍摄获取所述显示面板在所述多种不同颜色的光照射时，对应的像素电极图像；
    根据所述像素电极图像获取对应的多个灰阶图。
  6. 根据权利要求4所述的检测方法，其中，所述不同颜色的光是红光、绿光和蓝光，所述显示面板在所述红光、绿光和蓝光照射时对应第一灰阶图、第二灰阶图和第三灰阶图。
  7. 根据权利要求6所述的检测方法，其中，所述检测方法进一步包括：
    使用白光照射所述显示面板；
    获取所述显示面板在白光照射时的第四灰阶图；
    根据所述第四灰阶图判断所述显示面板是否具有缺陷；
    若所述第四灰阶图未出现灰阶差异，则判定所述显示面板不具有缺陷，并进行使用红光、绿光以及蓝光依次照射所述显示面板的步骤。
  8. 根据权利要求7所述的检测方法，其中，所述根据所述第四灰阶图判断所述显示面板是否具有缺陷的步骤还包括：
    若所述第四灰阶图出现灰阶差异，则判定所述显示面板具有缺陷。
  9. 一种显示面板的缺陷检测装置，其中，所述检测装置包括：
    光源模块，分别使用不同颜色的光照射所述显示面板；
    获取模块，获取所述显示面板在所述光源模块使用所述不同颜色的光照射时，对应多个灰阶图；
    处理模块，根据所述获取模块获取的所述多个灰阶图，判断所述显示面板是否具有缺陷，若所述多个灰阶图出现灰阶差异，则判定所述显示面板具有缺陷。
  10. 根据权利要求9所述的检测装置，其中，所述检测装置还包括拍摄模块，所述拍摄模块用于拍摄获取所述显示面板在所述不同颜色的光照射时对应的像素电极图像，所述获取模块根据所述拍摄模块获取的所述像素电极图像获取对应的所述灰阶图。
  11. 根据权利要求9所述的检测装置，其中，所述不同颜色的光是红光、绿光和蓝光，所述显示面板在所述红光、绿光和蓝光照射时对应第一灰阶图、第二灰阶图和第三灰阶图。
  12. 根据权利要求11所述的检测装置，其中，所述光源模块进一步用于使用白光照射所述显示面板，所述拍摄模块获取所述显示面板在白光照射时的像素电极图像，所述获取模块根据所述拍摄模块获取的白光照射时的所述像素电极图像获取对应的第四灰阶图。
  13. 根据权利要求12所述的检测装置，其中，所述处理模块根据所述第四灰阶图判断所述显示面板是否具有缺陷，若所述第四灰阶图未出现灰阶差异，则所述处理模块判定所述显示面板不具有缺陷，若所述第四灰阶图出现灰阶差异，则所述处理模块判定所述显示面板具有缺陷。
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