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:
Aug. 22, 1995
Filed:
May. 23, 1994
Randall D Briggs, Boise, ID (US);
Greg L Allen, Boise, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A page printer includes a variable frequency clock for producing at least two clock frequencies, one higher than the other. The page printer includes a first memory for storing a page processing procedure and a second memory for storing data comprising full page strips. A processor operates at the first clock frequency in conjunction with the page processing procedure and derives a rasterization execution time (RET) for display commands that define images to be printed in each page strip of a page. The processor compares the RET for each page strip with a threshold value and rasterizes in the standard manner any page strip whose RET is equal to or less than the threshold value (while operating under the influence of the first clock frequency). When a complex page strip is found (whose RET exceeds the threshold), the variable frequency clock is controlled to generate a second higher frequency clock signal and to cause the processor to operate at a rate determined by the higher clock frequency so that display commands in the complex page strip are rasterized at higher speed.