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:
Oct. 06, 1992
Filed:
Mar. 21, 1988
Kevin J Mackey, Palo Alto, CA (US);
Donald R Woods, Los Altos, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
An emulator emulates a processor that provides a display in which each character is presented in a foreground color on a background color. The emulator maps the foreground colors and background colors into gray pixel patterns for display, with the foreground colors being mapped differently than the background colors. Each background color is mapped into a respective gray pattern, with some of the gray patterns representing more than one background color if necessary. In general, the foreground colors are mapped to three pixel patterns--white, 50% gray, and black. For a given background color, two of these three gray patterns are chosen as most legible, and one is used for the lighter foreground colors and the other for the darker foreground colors. In the special case where the foreground color is the same as the background color, however, the foreground color is mapped to the same gray pattern as the background color so that the character is invisible.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile