Optical automatic detection system for TFT-LCD defects

Abstract

An optical automatic detection system for TFT-LCD defects comprises an automatic focal length adjustable lens, an industrial camera, a screen capture rotating mechanism, a screen lightening device, avision controller, a detection result displayer, a mechanical hand and a controller. When TFT-LCD defects are automatically detected, the screen lightening device firstly drives the TFT-LCD to displaya first detection picture, meanwhile, an instruction is transmitted to the vision controller, the vision controller receives the instruction and then controls the industrial camera to take a picture,and a picture processing procedure of the corresponding detection picture is operated. Then, a second detection picture is detected, and circular operation is sequentially performed till all the TFT-LCD detection pictures are displayed and detection is completed. Finally, the result is sent to the detection result displayer. In order to improve the detection accuracy, the vision controller controls the focal length adjustable lens to perform automatic focusing. In order to improve the detection efficiency, the screen capture rotating mechanism at the tail end of the mechanical hand performs rapid picking and placing. The system has the advantages of being high in detection accuracy rate and detection efficiency.

Description

technical field [0001] The invention relates to an optical automatic detection system, in particular to an optical automatic detection system for TFT-LCD defects. Background technique [0002] At present, TFT-LCD (Thin Film Transistor-Liquid Crystal Display) thin film transistor liquid crystal display is widely used in mobile phones, computer monitors and other fields due to its excellent performance, good mass production characteristics, and high yield rate. However, due to the complex production process and high process requirements, a small number of defective products with display defects are produced during the production process. The traditional manual inspection method is affected by the subjective factors of the inspectors and the objective environment, which makes it difficult for the traditional human eye defect inspection method to meet the requirements of production efficiency, inspection quality and low cost. [0003] Optical automatic inspection is to use mach...

AI Technical Summary

Problems solved by technology

From the above, it can be known that the existing TFT-LCD defect detection technology has disadvantages such as low efficiency, low accuracy, and inconsistent results.

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