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:
Jul. 07, 1992
Filed:
Jun. 27, 1988
James L Pappas, Leominster, MA (US);
Larry D Seiler, Boylston, MA (US);
Robert C Rose, Hudson, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
Pixel formats and a pixel mapping unit for use in a computer graphics terminal which provides an address input to a color look-up table. The disclosed pixel formats can be used to conserve frame buffer memory, color table memory, or both. For example, the formats support pseudo color or full color mapping, overlay planes, and color table bank select while using a minimum amount of memory. A valid plane feature is also supported, which can be used to enable rapid clearing of a window. The pixel mapping unit is especially handy in supporting multiple windows, because a unique mapping configuration word, which specifies how pixels are to be interpreted, may be specified for each window.