POLARIZATION OPTICAL SYSTEM AND PROJECTION-TYPE LIQUID-CRYSTAL DISPLAY DEVICE
PROBLEM TO BE SOLVED: To obtain a projection-type liquid crystal display device using a liquid-crystal light valve, wherein emission light which is not modulated by the liquid-crystal light valve is efficiently absorbed and high contrast can be obtained. SOLUTION: A polarization optical system 1 inc...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To obtain a projection-type liquid crystal display device using a liquid-crystal light valve, wherein emission light which is not modulated by the liquid-crystal light valve is efficiently absorbed and high contrast can be obtained. SOLUTION: A polarization optical system 1 includes a first polarization plate 7, arranged at the light incident side of the liquid-crystal light valve 2, for transmitting first polarized light (s-polarized light) included in light incident on the liquid-crystal light valve 2 from an illumination optical system (4, 5a and 5b)and a second polarization plate 9L, arranged at the light exit side of the liquid-crystal light valve 2, for transmitting second polarized light (p-polarized light), different from the first polarized light (s-polarized light), included in imaging light emitted from the liquid-crystal light valve 2 to a projection optical system 10. The second polarization plate 9L is configured in such a way that its light-incident face 9Lf is concave toward the liquid-crystal light valve 2. COPYRIGHT: (C)2009,JPO&INPIT |
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