发明名称 Image display apparatus having particular phase difference
摘要 An image display apparatus is disclosed which is capable of obtaining a projected image having high contrast. The image display apparatus includes a luminous flux dividing system dividing light from a light source into a plurality of luminous fluxes and a condensing optical system leading the luminous fluxes emerged from the luminous flux dividing system to a reflective liquid crystal display element. The condensing optical system includes a condenser lens, a field lens making light from the condenser lens substantially telecentric, a polarization beam splitter, and a ¼ phase plate disposed between the polarization beam splitter and the liquid crystal display element. In addition, the phase difference phi that the ¼ phase plate gives to the ray made incident into the ¼ phase plate at an angle theta satisf
申请公布号 US7196743(B2) 申请公布日期 2007.03.27
申请号 US20040922402 申请日期 2004.08.19
申请人 CANON KABUSHIKI KAISHA 发明人 ABE MASAYUKI;OKUYAMA ATSUSHI
分类号 G02F1/13;G02F1/1335;G02B27/14;G02B27/28;G03B21/00 主分类号 G02F1/13
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