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1. 发明公开

EP1215525A2 Method and apparatus for detecting gap of liquid-crystal panel and apparatus therefor 审中-公开
标题翻译： Verfahren und Vorrichtung zur Abstandsermittlung vonFlüssigkristallzellen
公开(公告)号：EP1215525A2
公开(公告)日：2002-06-19
申请号：EP01310464.1
申请日：2001-12-14
申请人： MITSUBISHI DENKI KABUSHIKI KAISHA , Meiryo Technica Corporation
发明人： Kurata, Tetsuyuki , Satake, Tetsuya , Nishioka, Takahiro , Togashi, Yoshihiro, c/o Meiryo Technica Corp. , Maehara, Toshiaki, c/o Meiryo Technica Corp. , Sato, Susumu
IPC分类号： G02F1/13
CPC分类号： G02F1/1309
摘要： Light from a light source 10 is linearly polarized by a polarizer 11. Then it propagates via a half-mirror 12 almost parallel to the normal to a reflective liquid-crystal panel 13 and falls on the reflective liquid-crystal panel 13. The reflected light reflected by the reflective liquid-crystal panel 13 is received by a detector 15 via the half-mirror 12 and an analyzer 14. In this state, the reflective liquid-crystal panel 13 is rotated about an axis almost parallel to the normal to the reflective liquid-crystal panel 13 and an angle (extinction angle) at which the output signal of detector 15 reaches minimum is measured. Then, the gap of the reflective liquid-crystal panel 13 is detected based on the measured extinction angle. It is also possible to measure the output signals of detector 15 by arranging the analyzer 14 in a state in which the transmission axis thereof is almost parallel to the polarization direction of the incident light and a state in which it is almost perpendicular thereto and to detect the gap of the reflective liquid-crystal panel 13 based on the measured signals.
摘要翻译：来自光源10的光线被偏振片11线偏振，然后通过半反射镜12几乎平行于反射液晶板13的法线传播，并落在反射液晶面板13上。反射光由反射型液晶面板13反射的反射型液晶面板13经由半反射镜12和分析仪14被检测器15接收。在该状态下，反射型液晶面板13绕与反射型液晶面板13的法线大致平行的轴线旋转液晶面板13和检测器15的输出信号达到最小的角度（消光角）。然后，基于测定的消光角检测反射型液晶面板13的间隙。还可以通过将分析仪14布置在其透射轴几乎平行于入射光的偏振方向的状态和几乎与入射光的偏振方向相同的状态并检测检测器15的输出信号，基于测量信号的反射液晶面板13的间隙。

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