System and method for detecting edge defects of liquid crystal screen
A screen edge and defect technology, which is applied in the system field of detecting liquid crystal screen edge defects, can solve the problems of insufficient detection stability, time-consuming and labor-intensive, complex structure and other problems of the detection system, achieve high accuracy, improve detection efficiency, and good environmental adaptability Effect
Pending Publication Date: 2021-10-22
BEIJING ZHAOWEI XINYUAN COMM TECH
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Problems solved by technology
[0006] In order to solve the above technical problems, the present invention provides a system for detecting edge defects of liquid crystal screens, which can solve the technical problems of insufficient detection stability, time-consuming and labor-intensive, and complex structure of the current detection system
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[0051] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0052]In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention Creation and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addi...
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The invention relates to a system for detecting edge defects of a liquid crystal screen, which comprises a horizontal detection surface, a detector vertically arranged above the detection surface, a first line light source positioned above the detection surface and a second line light source positioned below the detection surface, wherein the first line light source is rotatably arranged, and the light beam direction of the first line light source is rotated to enable the detector to perform bright field imaging; the second linear light source is rotatably arranged, and the light beam direction of the second linear light source is rotated to enable the detector to perform dark field imaging. The invention further provides a method for detecting the edge defects of the liquid crystal screen. The method is based on the system for detecting the edge defects of the liquid crystal screen. According to the invention, the layout of all parts is reasonable, the transparent edge and the opaque edge of the liquid crystal screen can be detected through simple light source design and change, the accuracy is high, the stability is good, and the detection efficiency is greatly improved.
Description
technical field [0001] The invention belongs to the technical field of mechanical automatic appearance inspection, in particular to a system and method for detecting edge defects of a liquid crystal screen. Background technique [0002] In the liquid crystal display industry, many advanced and large-scale screen manufacturers such as BOE and Tianma Microelectronics have an increasing demand for liquid crystal quality inspection. Similarly, in the semiconductor manufacturing process such as LCD screens, the yield loss faced by many advanced manufacturers at the edge of the screen is on average 10% to 50% higher than the area with the best yield rate. Defects at the edges have vital benefits in improving product quality and maintaining business competitiveness. [0003] At present, the traditional methods for detecting edge defects of LCD screens are manual detection or digital image processing detection. The manual detection method is simple and can be arranged flexibly; di...
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Login to View More IPC IPC(8): G01N21/95G01N21/01
CPCG01N21/95G01N21/01G01N2021/9513
Inventor 曹琳陶平李军陈馨馨李伟田永军
Owner BEIJING ZHAOWEI XINYUAN COMM TECH