標題: An effective method for evaluating the image-sticking effect of TFT-LCDs by interpretative modelling of optical measurements
作者: Chen, PL
Chen, SH
Su, FC
光電工程學系
Department of Photonics
公開日期: 1-七月-2000
摘要: The conventional method of evaluating the image-sticking effect of a LCD module is inspection by sight, because the residual optical difference between two stressing areas is small and viewing angle-dependent, so that it is difficult to obtain a significant optical difference value by instrumental measurement. We propose an effective method for evaluating the image-sticking effect of a TFT-LCD module by directly measuring its time evolution of transmission with the TFT glass turned off after a period of pattern stress. In this way, the liquid crystal system under charge equilibrium in constant-charge mode shows a dramatically amplified optical difference. Further, we interpret the measured results by a modelling that combines the calculation of liquid crystal director orientation and ionic charge distribution. It is supposed that there are four time constants that dominate the overall sticking phenomenon and belong to four transient processes: adsorption of ions, desorption of free ions, desorption of stuck ions, and TFT leakage. The modelling shows good accordance between measured and simulated results when fitting parameters are properly chosen.
URI: http://hdl.handle.net/11536/30419
ISSN: 0267-8292
期刊: LIQUID CRYSTALS
Volume: 27
Issue: 7
起始頁: 965
結束頁: 975
顯示於類別:期刊論文


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  1. 000088068900014.pdf