Projection display device

Details Projection display device Projection display device

2007-04-17

2007-04-17

Ward, John Anthony (Department: 2875)

Illumination

Light source and modifier

Plural serial lens elements or components

C349S005000, C348S798000, C353S030000, C353S102000, C362S318000

Reexamination Certificate

active

10474987

ABSTRACT:
A projection type display apparatus is composed of a light source (101), an illumination optical system (102) for forming illumination light, a reflection type light valve (106) for reflecting the illumination light to form an optical image, a projection optical system (107) for projecting the optical image, and a lens (105) with a positive power. An optical axis (115) of the reflection type light valve, an optical axis (113) of the projection optical system, and an optical axis (114) of the lens with a positive power are matched with each other. The illumination optical system (102) is placed so that the illumination light passes through the lens (105) with a positive power and is reflected from the reflection type light valve (106). An output pupil (108) of the illumination optical system (102) and an entrance pupil (109) of the projection optical system (107) are placed so as to have a conjugate relationship with respect to the lens (105) with a positive power.

REFERENCES:
patent: 6113240 (2000-09-01), Iizuka
patent: 6118501 (2000-09-01), Ohzawa
patent: 6129437 (2000-10-01), Koga et al.
patent: 6193376 (2001-02-01), Hayashi et al.
patent: 6439726 (2002-08-01), Piehler
patent: 6461001 (2002-10-01), Okamori et al.
patent: 10-228063 (1998-08-01), None
patent: 11-249069 (1999-09-01), None
patent: 2000-098272 (2000-04-01), None
patent: 2000-258839 (2000-09-01), None
patent: 2000-310751 (2000-11-01), None
patent: 2001-133881 (2001-05-01), None
patent: 2001-166292 (2001-06-01), None
patent: 2002-250894 (2002-09-01), None
patent: 98/29773 (1998-07-01), None

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