Mobile phone glass cover plate 3D arc edge defect detection method

Abstract

The invention relates to a mobile phone glass cover plate 3D arc edge defect detection method, which comprises the following steps: S1, installing and debugging cameras, and respectively adjusting the positions and angles of a first camera, a second camera and a third camera, so that the view of each camera can cover the whole 3D arc edge in the same direction and clearly image; S2, arranging a debugging light source, locating the debugging light source between each camera and the mobile phone cover plate, and adjusting the position and angle of the debugging light source, so that the light spot of the debugging light source can be imaged in the view of each camera; S3, adjusting and debugging the brightness and position of the light source and the exposure of the camera, so that the image in the visual field of the camera has obvious brightness change; S4, selecting a plurality of regions of interest in the view of each camera; S5, acquiring images of each camera under different light fields, and extracting and synthesizing the acquired images through an algorithm; and S6, synthesizing the same region of interest in each image to obtain different light field images, and performing defect identification under the different light field images.

Description

technical field [0001] The invention relates to a method for detecting an arc edge of a glass panel, in particular to a method for detecting a 3D arc edge defect of a glass cover plate of a mobile phone. Background technique [0002] As an important component of liquid crystal display products, glass cover is in increasing market demand. The annual shipment of mobile phone glass cover alone reaches 2 billion pieces per year. As one of the most important components of smart terminal products, the manufacture of glass cover plates has a huge market stock and growth potential, and is the focus of competition among many countries and enterprises. Among them, appearance inspection is the last process of glass cover plate production. The key to quality control. [0003] With the development of flexible OLED, mobile phone cover glass has gone through the development process from 2D to 2.5D and then to 3D. According to statistics, by 2020, the market size of 3D glass cover will be...

AI Technical Summary

Problems solved by technology

For the appearance inspection technology of mobile phone glass cover, 2D / 2.5D inspection technology is relatively mature, but 3D surface inspection technology is still difficult; the arc edge area includes the ink area and the window area, the curvature of the surface is large, and there are many types of defects. Traditional Advanced optical imaging technology is difficult to meet the detection technical requirements;

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