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:
Feb. 27, 1990
Filed:
Sep. 08, 1987
Carey J Sasser, Itasca, IL (US);
Vahid A Samiee, Tualatin, OR (US);
Auto-trol Technology Corporation, Denver, CO (US);
Abstract
A system to convert vector data to pixel data for drawing a vector on display screen that is divided into groups of pixels (matrices) having selected numbers of pixels in the x and y coordinate directions. The vector data is processed to define the slope of the vector and the number of matrices in the x and y directions the vector extends through. Counters are set to such numbers. Starting with the first matrix in which one end of the vector is located, a circuit defines which pixels must be enabled to draw the vector through that matrix. According to the location of the vector relative to decision points in the first matrix, a circuit identifies the next matrix through which the vector extends and causes the counter to count. This continues until the last matrix is identified and the pixels therein are enabled. An additional circuit masks those pixels, if any, in the first and last matrices that are beyond the end of the vector.