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:
Sep. 08, 1998
Filed:
Oct. 17, 1997
Padmanabhan Ramchandran, San Diego, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
The present invention uses a display list where each swath is segmented into a plurality of zones (or tiles) and each zone is processed as a separate unit. Objects going into the display list are clipped to horizontal and vertical zone boundaries by a parser. The individual zones in the display list are ultimately rasterized by an image processor, and a number of rasterized zones are temporarily stored in bit-mapped buffers. Hence, it is now possible to mix 0, 1, and 3-plane (CMY) zones in a single swath, resulting in faster throughput because fewer pixels are rendered, rotated, copied and erased. The invention also results in lower memory requirements for both the display list memory and the bit-mapped memory.