Keystone correction system and method

Details Keystone correction system and method Keystone correction system and method

2005-11-08

2005-11-08

Dowling, William C. (Department: 2851)

Optics: image projectors

Distortion compensation

For projection axis inclined to screen

C353S019000

Reexamination Certificate

active

06962417

ABSTRACT:
The invention relates to a keystone correction system and method. The system includes a projector for projecting an image on a projection surface and a platform to allow a user to vertically rotate the projector before horizontally rotating the projector. The projector corrects for keystone distortion responsive to the projector's vertical and horizontal position. The platform increases the keystone range of the projector. The keystone correction method includes moving a projector in a vertical direction and moving a projector in a horizontal direction after moving the projector in a vertical direction.

REFERENCES:
patent: 5720539 (1998-02-01), Woo
patent: 6592228 (2003-07-01), Kawashima et al.
patent: 6686973 (2004-02-01), Su
patent: 6793347 (2004-09-01), Morishita

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