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:
Apr. 30, 1991
Filed:
Mar. 16, 1990
Byron A Alcorn, Ft. Collins, CO (US);
Robert W Cherry, Loveland, CO (US);
Mark D Coleman, Fort Collins, CO (US);
Brian D Rauchfuss, Fort Collins, CO (US);
Gary L Taylor, Fort Collins, CO (US);
Hewlett-Packard Co., Palo Alto, CA (US);
Abstract
Methods and apparatus for providing pixel brightness correction in monitors. The methods and apparatus disclosed herein provide significant cost reductions in gamma correction circuitry by first degamma correcting pixel value data stored on a frame buffer, and then gamma correcting the degamma corrected pixel value data before the data is stored back on the frame buffer. Circuits for providing pixel brightness correction in a monitor comprise logic circuits for generating upper bits of a data word representing pixel intensity, shifter circuits interfaced with the logic circuits for generating lower bits of the data word representing pixel intensity, and combining circuits interfaced with the logic circuits and the shifter circuits for generating intermediate bits of the data word representing pixel intensity.