Rear projection type image display device

Details Rear projection type image display device Rear projection type image display device

2008-03-11

2008-03-11

Hasan, M. (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C353S030000

Reexamination Certificate

active

07342724

ABSTRACT:
The present invention relates to a rear projection type image display device comprising projection lenses (2, 3) for projecting an image displayed on an image display element onto a transmission type screen (6) on a larger scale, an optical path turn-back mirror (7) for turning back halfway a light beam projected from the projection lenses, and a drive circuit for displaying an image on the image display element, that are fixedly housed within a housing (5). When a diagonal size of the transmission type screen (6), the depth of the housing (5), and the length from a lower end of the screen (6) to a lower end of the housing (5), are assumed to be SS (inch), D (inch), and L (inch), respectively, the following conditions are satisfied:in-line-formulae description="In-line Formulae" end="lead"?SS>40,D≦SS/3.0,L≦SS/10.9.in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 4003080 (1977-01-01), Maiman et al.
patent: 5278595 (1994-01-01), Nishida et al.
patent: 5371559 (1994-12-01), San-Nohe et al.
patent: 5467154 (1995-11-01), Gale et al.
patent: 5539579 (1996-07-01), Miyatake et al.
patent: 5826961 (1998-10-01), Kim et al.
patent: 6233024 (2001-05-01), Hiller et al.
patent: 6457834 (2002-10-01), Cotton et al.
patent: 6473236 (2002-10-01), Tadic-Galeb et al.
patent: 6473244 (2002-10-01), Sugano
patent: 6476981 (2002-11-01), Shikama
patent: 6560031 (2003-05-01), Shafer et al.
patent: 6577455 (2003-06-01), Shikama
patent: 6761458 (2004-07-01), Sakata et al.
patent: 2002/0044263 (2002-04-01), Takeuchi
patent: 0 240 045 (1987-10-01), None
patent: 0 952 474 (1999-10-01), None
patent: 5-134213 (1993-05-01), None
patent: 10-260474 (1998-09-01), None
patent: 2000-162544 (2000-06-01), None
patent: 2002-207190 (2002-07-01), None
patent: 2002-357768 (2002-12-01), None
patent: WO 02/079826 (2002-10-01), None
Chinese Office Action with English translation issued in corresponding Chinese Patent Application No. 2004-100570726, dated Nov. 17, 2006.

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