Projection type video display and method of adjusting the...

Details Projection type video display and method of adjusting the... Projection type video display and method of adjusting the...

2007-01-02

2007-01-02

Perkey, W. B. (Department: 2851)

Optics: image projectors

Distortion compensation

For projection axis inclined to screen

C353S069000, C353S101000, C348S746000, C348S747000, C345S647000

Reexamination Certificate

active

10891497

ABSTRACT:
A microcomputer performs image drawing processing of a projection video for adjustment by an OSD (On-Screen Display) circuit when it detects the press of an adjustment command key. The projection video for adjustment is an image having a black-and-white area high in contrast formed therein. The projection video for adjustment is picked up by a CCD line sensor in a sensor. A microcomputer has its input an image pick-up signal from the CCD line sensor, to make focusing adjustment and trapezoidal distortion correction on the basis of the image pick-up signal.

REFERENCES:
patent: 6416185 (2002-07-01), Smith
patent: 2004/0070694 (2004-04-01), Haruna et al.
patent: 2002-213946 (2002-07-01), None
patent: 2003-57531 (2003-02-01), None
patent: 2003-78842 (2003-03-01), None

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