Automated visual inspection of LCD modules

Tuan-Kay Lim; Chan Hin Kam; E. J. Yap; H. Y. Yap

doi:10.1117/12.258241

14 November 1996 Automated visual inspection of LCD modules

Tuan-Kay Lim, Chan Hin Kam, E. J. Yap, H. Y. Yap

Proceedings Volume 2847, Applications of Digital Image Processing XIX; (1996) https://doi.org/10.1117/12.258241
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

We report on the development of an automated visual inspection system for liquid crystal display (LCD) modules. The system comprises a highly graphical software program, a unique image processing algorithm, a PC interface card for driving different types of LCD modules, and a universal test jig for holding these modules. The system is able to detect faulty or malfunctioning LCD modules with minimum intervention from human operator; allows testing to be carried out for evaluating the display quality such as contrast ratio; is able to create new test databases for new LCD modules; allows permanent storage/backup of test databases for each individual LCD module; and provides a friendly user interface for ease of operation. In addition, the system has the following features: different access levels for different users; an editor for creating software drivers for driving different types of LCD modules; and a graphical help facility.

Citation Download Citation

Tuan-Kay Lim, Chan Hin Kam, E. J. Yap, and H. Y. Yap "Automated visual inspection of LCD modules", Proc. SPIE 2847, Applications of Digital Image Processing XIX, (14 November 1996); https://doi.org/10.1117/12.258241

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