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Inspection method of liquid crystal display panel and inspection device of liquid crystal display panel

A technology of liquid crystal display panel and inspection method, which is applied in the direction of identification device, measuring device, testing of machine/structural components, etc., can solve the problem of inability to inspect liquid crystal display panel and the like

Inactive Publication Date: 2017-03-15
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the inspection of the liquid crystal display panel may not be properly performed.

Method used

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  • Inspection method of liquid crystal display panel and inspection device of liquid crystal display panel
  • Inspection method of liquid crystal display panel and inspection device of liquid crystal display panel
  • Inspection method of liquid crystal display panel and inspection device of liquid crystal display panel

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Embodiment Construction

[0059] Hereinafter, examples of embodiments of the present invention will be described in detail based on the drawings.

[0060] like figure 1As shown, the inspection device 101 (imaging processing part, defect detection part) for inspecting the liquid crystal display panel 104 as the inspection object is connected with a camera 102 using a CCD, for example, and the liquid crystal disposed between the camera 102 and the backlight 103 Image data (first image data) of an image captured by the display panel 104 is input to the inspection device 101 . The above-mentioned backlight 103 is formed by providing a polarizing plate 103b on a backlight main body portion 103a. The liquid crystal display panel 104 is formed by providing a color filter 104b on a liquid crystal panel 104a.

[0061] The inspection device 101 uses a camera 102 to capture, for example, light emitted from the backlight 103 from the rear side of the liquid crystal display panel 104 and transmitted through the ...

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Abstract

In order to suitably perform inspection of a liquid crystal display panel, first image data is obtained by picking up an image of a liquid crystal display panel to be inspected that is arranged between the camera and a backlight. Defects of the liquid crystal display panel are detected based on the first image data and prescribed second image data. The prescribed second image data is image data corresponding to the image data obtained when an image of a liquid crystal display panel that does not have a bright spot defect is arranged between the camera and a backlight is picked up. In this defect detection, defects of the liquid crystal display panel are detected by (S103) removing bright spot images contained in the second image data from the bright spot images contained in the first image data.

Description

technical field [0001] The invention relates to an inspection method and an inspection device for inspecting whether there is a defect in a liquid crystal display panel. Background technique [0002] In order to obtain a liquid crystal display panel capable of displaying high-quality images, various automatic inspection methods for display defects of liquid crystal display panels have been proposed. For example, a method has been proposed in which a liquid crystal display panel is irradiated with a backlight, and a defect of the liquid crystal display panel is photographed by an imaging device, such as a camera using a CCD (charge-coupled device: charge-coupled device), thereby inspecting whether the liquid crystal display panel is present or not. Show defects. [0003] More specifically, for example, the backlight arranged opposite to the back of the liquid crystal display panel is turned on, and the backlight light transmitted through the liquid crystal display panel is p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/00G02F1/13G09F9/00
CPCG02F1/1309
Inventor 西村吉弘添野宣松本直基
Owner SHARP KK
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