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:
Jan. 03, 1989
Filed:
May. 05, 1986
David G Clark, Redhill, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A pixel rounding method and circuit for bit-map graphics displays. The pixel codes are divided into two groups 'high' and 'low', and pixels with 'high' groups codes are rounded against pixels with 'low' group codes. The rounding can be prerounding or postrounding and involves extending a rounded pixel partway into the adjacent (preceding or succeeding) pixel position. Rounding decisions are made by detecting diagonal relationships of 'high' and 'low' group codes in blocks in four pixel codes. A rounding circuit receives a pixel code stream and produces a version thereof which is delayed by one pixel period. In accordance with the rounding decisions, the original and delayed pixel code streams are selectively switched each half pixel period to provide a resultant pixel code stream which is used to generate the display.