The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 08, 2005
Filed:
Jan. 05, 2004
Tianbing Teng, Portland, OR (US);
Michael Callahan, Tualatin, OR (US);
Tianbing Teng, Portland, OR (US);
Michael Callahan, Tualatin, OR (US);
Pixelworks, Inc., Tualatin, OR (US);
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.