公开(公告)号：US5576854A

公开(公告)日：1996-11-19

申请号：US152996

申请日：1993-11-12

申请人： Jack H. Schmidt ,  Ned Nestorovic ,  Rodney D. Sterling ,  Joseph M. Haggerty ,  Javier A. Ruiz ,  Robert Edwards ,  Roger Hollister

发明人： Jack H. Schmidt ,  Ned Nestorovic ,  Rodney D. Sterling ,  Joseph M. Haggerty ,  Javier A. Ruiz ,  Robert Edwards ,  Roger Hollister

IPC分类号： G02F1/13 ,  G02F1/133 ,  G02F1/1333 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/135 ,  G03B21/00

CPC分类号： G02F1/133385 ,  G02F1/1333 ,  G02F1/133528 ,  G02F1/135 ,  G02F2001/133638

摘要： In a liquid crystal light valve projector, a quarter-wave compensator plate is disposed between a polarization plate and a liquid crystal light valve to compensate for polarization irregularities induced by the off-incident reflections in the cone of light projected onto the LCLV. The quarter-wave compensation plate reverses the phase of the P component of said illumination light with respect to said compensator plate by 180.degree. thereby eliminating P-polarization leakage during the dark state of an LCLV projector. The invention also combines the compensator plate with a heat shield and a low stress-optical coefficient counter electrode substrate to reduce the birefringence of the LCLV thereby also minimizing leakage of P-polarized light onto the projection screen during the dark state of the projector.

摘要翻译： 在液晶光阀投影机中，在偏振板和液晶光阀之间设置四分之一波长的补偿板，以补偿投射到LCLV上的光的入射反射引起的偏振不均匀。 四分之一波长补偿板将所述照明光的P分量相对于所述补偿板的相位反转180度，从而消除LCLV投影仪暗处的P极化泄漏。 本发明还将补偿板与隔热板和低应力光学系数对电极基板结合起来，以减少LCLV的双折射，从而也可以在投影机的黑暗状态期间最小化P偏振光到投影屏幕上的泄漏。