Defect detection device and method for liquid crystal display panel with polarizing film

Abstract

The invention discloses a defect detection device and a defect detection method for a liquid crystal display panel with a polarizing film. The defect detection device comprises an infrared image input device (100), a signal processing device (200) and a warning device (300), wherein the infrared image input device (100) is used for acquiring and outputting an image of the liquid crystal display panel (500) with a polarizing film (600); the signal processing device (200) is used for acquiring a pre-defect image of the liquid crystal display panel (500) with the polarizing film (600) on the basis of the image of the liquid crystal display panel (500) with the polarizing film (600) and judging whether the pre-defect image is a defect according to comparison results between the size and shape of the pre-defect image and the size and shape of the defect image in a database; the warning device (300) is used for judging whether to send out a warning signal based on a judgment result of the signal processing device (200). According to the defect detection device and the detection method, foreign matters and / or bubbles on the liquid crystal display panel with the polarizing film can be detected in real time, so that the inspection missing risk of the defected liquid crystal display panel is greatly lowered, meanwhile, the production cost is lowered, and the production efficiency is increased.

Description

technical field [0001] The invention relates to the field of liquid crystal display, and more specifically, to a defect detection device and a defect detection method of a liquid crystal panel attached with a polarizer. Background technique [0002] A liquid crystal display device (Liquid Crystal Display, LCD) has many advantages such as a thin body, power saving, and no radiation, and is widely used. For the specific structure of the liquid crystal display device, please refer to figure 1 , which mainly includes a liquid crystal panel 10 and a backlight module 20 arranged opposite to the liquid crystal panel 10; wherein the liquid crystal panel 10 includes a first substrate 11 and a second substrate 12 facing the first substrate 11, and the first A liquid crystal layer 13 is interposed between the substrate 11 and the second substrate 12 . The first substrate 11 disposed close to the backlight module 20 is usually a TFT array substrate, and the second substrate 12 dispose...

AI Technical Summary

Problems solved by technology

However, in the current lighting detection method, due to the cost limitation of lighting detection equipment and manpower, the sampling inspection of the liquid crystal panel attached with the polarizer cannot be completely inspected, but the sampling inspection is carried out according to a certain ratio, which will result in There is a great risk of missed inspection of defective liquid crystal panels attached with polarizers

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