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:
May. 23, 2006
Filed:
Mar. 31, 2001
Calvin Selig, Fort Collins, CO (US);
Roy Troutman, Fort Collins, CO (US);
Calvin Selig, Fort Collins, CO (US);
Roy Troutman, Fort Collins, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A technique for performing clear operations in a region having a subregion. Responsive to a first clear command: perform an initialization in which stale information is eliminated from pixels outside the subregion. Responsive to subsequent clear commands: update a current clear count for the region; and write the updated current clear count into clear count values associated with pixels outside the subregion. Prior to creating the subregion, a conventional fast clear technique may be employed in the region. After creating the subregion and during its life, the inventive technique may be employed. After the subregion is discontinued, the conventional technique may once again be employed. The inventive technique may be employed optionally depending on the percentage of the region's area occupied by the subregion.