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:
Nov. 23, 1993
Filed:
Nov. 04, 1991
Applicant:
Inventors:
Bala R Vatti, Hudson, NH (US);
Robert L Hammond, Nashua, NH (US);
Assignee:
CalComp Inc., Anaheim, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
395143 ; 395132 ; 395164 ;
Abstract
This method and apparatus are suitable for inclusion in the 'graphics circuit board' of a personal computer. The digital output of the computer is used to plot a series of 'pixel pairs' which, taken together, closely approximate the desired path of a line to be drawn on a display device such as a color cathode-ray tube. The addresses and relative intensities of the pixels of each pair and of the series are computed so as to produce a line that is substantially free from the 'jaggies' resulting from 'aliasing' in prior-art apparatus. Computation of addresses relies upon both integer and floating-point numbers.