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Optical detection method and device for display panel

A display panel and optical detection technology, which is applied to optical testing flaws/defects, material analysis by optical means, measuring devices, etc. The detection rate and the effect of reducing the over-judgment rate

Inactive Publication Date: 2019-09-27
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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Problems solved by technology

The optical detection method in the prior art has a low defect detection rate and a high pass judgment rate

Method used

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

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Embodiment Construction

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0035] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0036] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses an optical detection method and device of a display panel. The display panel comprises a first surface and a second surface, and the first surface and the second surface are oppositely arranged, and the optical detection method comprises the following steps of shooting the first surface to obtain a first surface image, wherein an image capturing device is positioned on one side of the first surface far away from the second surface during shooting; shooting the second surface to obtain a second surface image, wherein the image capturing device is positioned on one side of the second surface far away from the first surface during shooting; shooting the display panel to obtain a mixed flaw image, wherein the display panel is positioned between the image capturing device and a backlight source during shooting, and the flaws of the mixed flaw image comprise surface foreign matters of the display panel and internal flaws of the display panel; and filtering the foreign matters on the first surface and the foreign matters on the second surface in the mixed flaw image to identify the internal flaws of the display panel according to the first surface image and the second surface image. The optical detection method and device of the display panel can improve the detection rate of the display panel and reduce the over-judgment rate.

Description

technical field [0001] The present invention relates to the field of display technology, and more specifically, to an optical detection method and equipment for a display panel. Background technique [0002] Existing display panel manufacturers usually need to inspect the yield rate of the display panel after the display panel is manufactured, and the optical inspection method is widely used as an effective inspection method for emerging industrial automation. [0003] The optical inspection method is based on the principle of optics and uses high-speed and high-precision visual processing technology to detect defects generated during the production process of the display panel. The optical detection method in the prior art has a low defect detection rate and a high pass judgment rate. [0004] Therefore, it is a technical problem to be solved urgently in this field to provide an optical detection method and equipment for a display panel with high detection rate and low fal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/95G01N21/94G01N21/88
CPCG01N21/95G01N21/94G01N21/8806G01N2021/9513
Inventor 杨传武
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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