Rear projection type projector and its method of use

Details Rear projection type projector and its method of use Rear projection type projector and its method of use

2006-08-08

2006-08-08

Perkey, W. B. (Department: 2851)

Optics: image projectors

Distortion compensation

For projection axis inclined to screen

C353S077000, C353S079000, C359S460000, C348S746000, C348S747000, C345S647000, C382S275000

Reexamination Certificate

active

07086743

ABSTRACT:
A rear projection type projector is provided. An optic axis of modulated light to be projected to a screen projection surface is slanted to a normal N-N of the screen projection surface and projected to a trapezoidal range ABCD housing the actual projection range EFGH. A reflector is disposed in the rear of the screen projection surface, a projection unit projecting modulated light is placed on a side of the screen projection surface, and the modulated light is projected towards the rear, and then reflected at the reflector. Further, image information is corrected and a distortion-free image is projected.

REFERENCES:
patent: 5302983 (1994-04-01), Sato et al.
patent: 6233024 (2001-05-01), Hiller et al.
patent: 6457834 (2002-10-01), Cotton et al.
patent: 03-015812 (1991-01-01), None
patent: 07-155442 (1995-06-01), None
Communication from Korean Patent /office regarding counterpart application.

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