Retardation compensating plate to compensate residual retardation of a liquid crystal panel, a compensator, a liquid crystal display device, and a projection image display apparatus having the same

c p cpA retardation compensator for compensating for residual retardation of a liquid crystal panel includes a retardation compensating plate having birefringence. An in-plane retardation Rof the retardation compensating plate and an in-plane retardation Rof the liquid crystal panel satisfy a relati...

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Main Authors Muramoto, Yutaka, Sekino, Satoshi, Terashima, Hideki, Harima, Tatsuya, Shoji, Sachie, Doi, Noriaki, Morioka, Tokuhiro
Format Patent
LanguageEnglish
Published 13.09.2011
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Summary:c p cpA retardation compensator for compensating for residual retardation of a liquid crystal panel includes a retardation compensating plate having birefringence. An in-plane retardation Rof the retardation compensating plate and an in-plane retardation Rof the liquid crystal panel satisfy a relationship of 1<R/R≦10, thereby allowing changes in the amount of compensated retardation among rotation angles occurring when the retardation compensating plate is set with respect to the liquid crystal panel to be confined within narrow limits. Therefore, the contrast can be adjusted readily, and variations in residual retardation among the individual liquid crystal panels can be accommodated flexibly.