Projecting display apparatus

Details Projecting display apparatus Projecting display apparatus

2008-01-29

2008-01-29

Dowling, William C. (Department: 2851)

Optics: image projectors

Prism in light path

C348S771000

Reexamination Certificate

active

11145929

ABSTRACT:
A projector engine is provided with an illuminating optical system having an optical axis in parallel with a horizontal direction of a screen and a projecting optical system having an optical axis perpendicular to the optical axis. A first mirror, a total reflection prism and DMD are provided between the illuminating optical system and the projecting optical system. The total reflection prism guides illuminating light incident from the illuminating optical system to DMD and totally reflects image light emitted from DMD to emit to the projecting optical system. DMD is inclined by 45 degrees to the horizontal direction of the screen along with a circuit board and is rotated by 45 degrees centering on a direction of a normal line of DMD.

REFERENCES:
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patent: 6726332 (2004-04-01), Cannon et al.
patent: 6840631 (2005-01-01), Sawamura et al.
patent: 7077528 (2006-07-01), Bowron et al.
patent: 7128425 (2006-10-01), Kumai
patent: 2002-6257 (2002-01-01), None
patent: 2003-262918 (2003-09-01), None

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