Liquid crystal screen defect and dust distinguishing method based on binocular visual system and detection device

Abstract

The invention discloses a liquid crystal screen defect and dust distinguishing method based on a binocular visual system and a detection device. The distinguishing method comprises the following stepsthat the binocular visual system is calibrated by using a target frame with a liquid crystal layer acting as a reference surface, and the mapping relation between the image coordinate systems corresponding to the binocular visual system is determined; imaging of the liquid crystal screen is performed by using the binocular visual system so that a binocular image A and an image B are obtained; image processing is performed on the image A and the image B so as to acquire defect information in the images; the image A and the image B are converted to a reference surface coordinate system; as forthe defects in the image A and the image B, the parallax information of the defects on the liquid crystal screen in the image A and the image B is acquired in the reference surface coordinate system;and the parallax information of the defects in the image A and the image B is judged, the defects are the foreign matter defects if the parallax information is the same and the defects are the surfacedust if the parallax information is different. The problems in the prior art that the foreign matter defects and the surface dust cannot be distinguished by automatic detection equipment can be solved.

Description

technical field [0001] The invention relates to the technical field of visual detection, in particular to a method for distinguishing liquid crystal screen defects and dust based on a binocular vision system and a detection device. Background technique [0002] The typical composition of LCD (Liquid Crystal Display) liquid crystal screen is TP (Touch Panel, touch screen) glass, upper polarizer, color filter, liquid crystal layer, TFT (Thin Film Transistor, thin film transistor) substrate, lower polarizer from top to bottom and backlight. With the development of LCD technology, it has quickly become the leading role in the display market due to its characteristics of high resolution, small size, light weight, no radiation, flat panel and low power consumption. From mobile phones to portable game consoles, from industrial equipment to artificial LCD is ubiquitous in many fields such as operating platform to bank self-service equipment ATM (Automatic Teller Machine). Therefor...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a method for distinguishing liquid crystal screen defects and dust based on a binocular vision system and a detection device, so as to solve the problem that the automatic detection equipment in the current technology cannot detect foreign matter defects and surface dust. the problem of distinction

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