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:
Feb. 18, 2003
Filed:
Feb. 06, 2001
Steven E. Stark, Portland, OR (US);
Henry Frazier Pruett, Sandy, OR (US);
InFocus Corporation, Wilsonville, OR (US);
Abstract
A frame sequential color display projection system ( ) of this invention includes an arc lamp ( ) having a predetermined power rating for providing a source of polychromatic light that propagates through a color wheel ( ) that sequentially provides R, G, B, and optionally, W light colors during respective sequential time periods. A display controller ( ) is synchronized with the color wheel to generate color image data during the respective time periods. A light valve, such as a DMD ( ), receives the color image data for generating the frame sequential color display. A lamp ballast ( ) is also synchronized with the color wheel to provide nominal and boosted power levels ( ) to the arc lamp during selected ones of the time periods such that the projector provides a brighter, color-adjusted display without requiring the arc lamp to operate at an average power level exceeding its predetermined power rating.