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A display panel defect classification method and device based on aoi

A technology for displaying panel defects and classification methods, which is applied in the directions of measuring devices, optical testing for defects/defects, and analyzing materials, etc. It can solve the problems of difficult control of gray level uniformity, complicated manufacturing process, and low detection efficiency, and achieve improved detection The effect of efficiency and precision

Active Publication Date: 2021-02-12
WUHAN JINGCE ELECTRONICS GRP CO LTD
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Problems solved by technology

The display panel is the main part of the flat-panel display device. Its manufacturing process is complicated, and as the size of the display panel becomes larger, it becomes more and more difficult to control the uniformity of the gray scale. Therefore, it is inevitable that various A variety of display defects, such as bright spots / dark spots / foreign matter bright / BL foreign matter (backlight foreign matter) / white spots / bright dark lines / Mura and other display defects
[0003] At present, the display panel production line generally adopts the method of visually identifying the number and type of display defects to judge the level of the display panel, which has low detection efficiency and high false detection rate.

Method used

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  • A display panel defect classification method and device based on aoi
  • A display panel defect classification method and device based on aoi
  • A display panel defect classification method and device based on aoi

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Embodiment

[0033] Embodiment: A display panel defect level judging device capable of learning, classifying and level judging the defect types of the display panel

[0034] Such as figure 1 As shown, a display panel defect level judging device provided in the embodiment of the present invention mainly includes an industrial camera, an image algorithm processing module, a defect classifier learning module, a defect classification module and a defect level judging module. Among them, the industrial camera is mainly used to collect the display screen of the display panel; the image algorithm processing module is mainly used to extract defect feature information from the display screen; the defect classifier learning module is used to provide defect type configuration files and defect feature attribute gradient files; The defect classification module is used to identify the defect type according to the defect type configuration file and the defect characteristic attribute gradient file; the d...

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Abstract

The present invention discloses an AOI-based display panel defect classification method and device, which includes: 1) collecting a display screen of the display panel, and extracting a defect feature attribute vector d of the display screen; 2) providing a defect feature attribute description set M, the defect feature attribute description set M includes feature attribute description vectors m of multiple defect types; the defect feature attribute vector d is convolved with each defect type feature attribute description vector m to generate a set of convolution values ; Among them, the defect type corresponding to the largest convolution value is the defect type of the defect characteristic attribute vector d. The present invention automatically extracts the defect characteristic information of the display panel, and automatically identifies the number and type of display defects, thereby realizing the automation of defect identification and grade determination of the display panel, and greatly improving the detection of defect recognition and grade determination of the display panel efficiency and precision.

Description

technical field [0001] The invention relates to the technical field of display panel detection, in particular to an AOI-based defect classification method and device for display panels. Background technique [0002] Flat-panel displays have the advantages of high resolution, high grayscale, and no geometric deformation. At the same time, due to their small size, light weight, and low power consumption, they are widely used in consumer electronics products that people use every day, such as TVs, computers, Mobile phones, tablets, etc. The display panel is the main part of the flat-panel display device. Its manufacturing process is complicated, and as the size of the display panel becomes larger, it becomes more and more difficult to control the uniformity of the gray scale. Therefore, it is inevitable that various A variety of display defects, such as bright spots / dark spots / foreign objects bright / BL foreign objects (backlight foreign objects) / white spots / bright dark lines / M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/88
CPCG01N21/8851G01N2021/8854G01N2021/8887
Inventor 吕东东张胜森邓标华
Owner WUHAN JINGCE ELECTRONICS GRP CO LTD
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