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Defect detection method and device for display panel

A display panel and detection method technology, which is applied in the direction of measuring devices, optical testing of flaws/defects, and material analysis through optical means, and can solve the problems of difficult resolution, easy missed detection of optical defect inspection machines, and reduced detection capabilities of display panels, etc. problems, to prevent missed inspections and improve defect detection capabilities

Inactive Publication Date: 2013-05-01
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

However, because some types of defects have small gray scale differences corresponding to the gray scale image when white light illuminates the display panel, it is not easy to distinguish, so the optical defect inspection machine is very easy to miss inspection, thereby reducing the defect detection ability of the display panel

Method used

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  • Defect detection method and device for display panel
  • Defect detection method and device for display panel
  • Defect detection method and device for display panel

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Embodiment Construction

[0026] The invention provides a defect detection method of a display panel and a detection device thereof. Specifically, the defect detection method of the present invention mainly sequentially irradiates the display panel with light of a variety of different colors, and obtains a plurality of corresponding grayscale images, and then judges and detects defects with grayscale differences according to the grayscale differences in the grayscale images. display panel. Among them, the defects include pixel particle shedding, uneven pixel distribution, water residue and ITO residue and other types of display defects, and the gray scale response of each type of defect is different when different colors of light illuminate the display panel.

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] figure 1 It is a schematic flowchart of an embodiment of a defect detection method for a display panel of th...

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Abstract

The invention provides a defect detection method and device for a display panel. The detection method comprises the following steps: using various light of different colors to sequentially irradiate the display panel; acquiring a plurality of corresponding gray-scale pictures when the display panel is irradiated by the various light of different colors; and judging whether the display panel has defects or not, and the result is yes when the plurality of gray-scale pictures have gray-scale differences. Through the method, the defect detection capability of an optical defect detector to the display panel is improved and undetected errors are avoided.

Description

technical field [0001] The present invention relates to the technical field of display panel detection, in particular to a defect detection method of a display panel and a detection device thereof. Background technique [0002] With the development of the times, liquid crystal display panels for displaying high-quality images have become more and more popular. However, according to the existing display panel manufacturing technology, it is very difficult and unrealistic to completely avoid the occurrence of display defects. Therefore, in the display panel manufacturing process, it is very necessary to perform a display defect inspection process on the display panel. [0003] In the prior art, white light is generally used to irradiate the display panel, and a corresponding grayscale image is acquired, and then whether the display panel has a defect is determined according to whether there is a grayscale difference in the grayscale image. However, since some types of defects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/958
CPCG01N2021/8845G01N21/896G01N21/01G01N21/958G01N2021/9513G01N21/8806G01N21/95
Inventor 林勇佑
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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