Illumination optical system and projector apparatus using the sa

Optics: image projectors – Unitary plural refracting surfaces

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353 69, G03B 2114

Patent

active

060300825

ABSTRACT:
In an illumination optical system whose optical axis is inclined with respect to the normal of a liquid crystal display panel 23, the form of each lens element constituting each of flyeyes (integrator plates) 11A, 11B of an integrator section 11 is adjusted in a direction along which extends a line of intersection formed between each of the flyeyes 11A, 11B and a plane including the optical axis of the integrator section 11 and the normal of the liquid crystal display panel 23, such that, when a luminous flux is obliquely incident on the liquid crystal display panel 23, its illumination area on the liquid crystal display panel 23 has a size larger than the effective area of the liquid crystal display panel 23 by a slight margin, whereby illumination efficiency is prevented from decreasing on the liquid crystal display panel 23.

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patent: 5418583 (1995-05-01), Masumoto
patent: 5473393 (1995-12-01), Manabe
patent: 5662401 (1997-09-01), Shimizu et al.
patent: 5786939 (1998-07-01), Watanabe
patent: 5959704 (1999-09-01), Suzuki et al.

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