Automated optical inspection method and system
An automatic optical inspection and image technology, applied in the direction of optics, optical testing defects/defects, nonlinear optics, etc., to improve quality, reduce unqualified products, and improve yield
Active Publication Date: 2018-08-21
EVOC SMART IOT TECH CO LTD
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[0004] Based on this, it is necessary to provide an automatic optical detection method for the problem of low quality of liquid crystal display screens that can only detect dead pixels and bright line defects, which can detect various defects, thereby improving the quality of liquid crystal display screens
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[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0029] figure 1 It is a schematic diagram of an implementation environment involved in the automatic optical inspection method. The implementation environment includes a camera 110, a light source 120, an image capture card 130, a computer 140, a display 150, a liquid crystal display screen 160 to be inspected, and a driving system 170. Among them, the computer 140 is connected to the frame grabber 130, the display 150, and the liquid crystal display screen 160 to be tested respectively, the camera 110 is connected to the frame grabber 130, and the drive system 170 is connected to the compute...
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The invention relates to an automatic optical detection method and an automatic optical detection system. The method comprises the following steps: obtaining liquid crystal screen images in preset display states of multiple pure colours, grey-scale images, grey-level images and multi-colour alternating images respectively; processing the liquid crystal screen images in the obtained display states, judging whether a liquid crystal screen has defects or not, if so, then identifying the types of the defects, recording the positions of the defects, and counting the number of the defects; obtaining the liquid crystal screen images of the turned-off liquid crystal screen in an external light irradiation state; processing the liquid crystal screen images in the obtained external light irradiation state, and judging whether the liquid crystal screen has appearance defects or not. According to the automatic optical detection method and the automatic optical detection system provided by the invention, brightness, dark spots, bright lines, dark lines, surface defects and appearance defects can be detected, defect detection types are increased, unqualified products are reduced, the quality of the liquid crystal screen is improved, a production line can be improved, and the production yield of the liquid crystal screen can be increased.
Description
Technical field [0001] The present invention relates to the field of automatic optical inspection, in particular to an automatic optical inspection method and system. Background technique [0002] In recent years, because LCD (Liquid Crystal Display, liquid crystal display) has good characteristics of lightness and thinness, it has been used in most communication products (such as car navigation systems, mobile phones), consumer electronic products (such as LCD TVs, cameras, etc.). ), instrument products and industrial automation products, all use LCD as a control panel, and its application range is very wide. Since the entire LCD production process is long, the substrate size is getting larger and the circuit size is getting more and more precise, therefore, strict quality control is required in the LCD production process. The traditional LCD inspection method is mainly through manual inspection. Due to human subjective differences, it will bring many uncontrollable factors to ...
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IPC IPC(8): G01N21/88G02F1/13
Inventor 陈志列庞观士林淼刘恩锋邹建红方小明刘志永陈超林诗美
Owner EVOC SMART IOT TECH CO LTD