Projection type video display

Details Projection type video display Projection type video display

2008-06-10

2008-06-10

Dowling, William C. (Department: 2851)

Optics: image projectors

Distortion compensation

C353S101000

Reexamination Certificate

active

07384157

ABSTRACT:
A projection type video display has a sensor which includes an image pick up device to take a projected image and the projection type video display projects an adjustment image to automatically implement the focus adjustment and the keystone distortion correction on the basis of output of the sensor.

REFERENCES:
patent: 6422704 (2002-07-01), Gyoten et al.
patent: 6530666 (2003-03-01), Smith et al.
patent: 6814448 (2004-11-01), Ioka
patent: 7175285 (2007-02-01), Li et al.
patent: 2007/0097326 (2007-05-01), Yang
patent: 2003-78842 (2003-09-01), None
patent: 2004-205684 (2004-07-01), None
Japanese Office Action dated Jan. 30, 2007 (recieved Feb. 2, 2007), Application No. 2004-009831.

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