发明名称 METHOD AND DEVICE FOR MEASURING ION DENSITY IN LIQUID CRYSTAL PANEL
摘要 PROBLEM TO BE SOLVED: To measure the ion density in a liquid crystal display panel by a nondestructive method and to know the distribution of ion density in a liquid crystal display panel. SOLUTION: Flickers are observed by applying square waves of the frequency as low as 1 Hz (step S303). The amplitude of the observed flickers or the flicker area is measured (step S308). The ion density in the liquid crystal panel is calculated from the calibration curve preliminarily obtained (which shows the correlation between the amplitude or area of flickers and the ion density) (step S309).
申请公布号 JP2001004971(A) 申请公布日期 2001.01.12
申请号 JP19990264886 申请日期 1999.09.20
申请人 NEC CORP 发明人 SASAKI NORINAGA
分类号 G01N21/59;G01N21/21;G02F1/13;(IPC1-7):G02F1/13 主分类号 G01N21/59
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