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:
Apr. 05, 1988
Filed:
Feb. 10, 1986
Yoshiyuki Nakayama, Yokohama, JP;
Akio Hayashi, Yokohama, JP;
Junichi Seki, Hitachi, JP;
Kenjiro Mori, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The tangent .alpha. of the tangential line of an image to be drawn at each point in an orthogonal X-Y coordinate system is classified into two angle regions, a first angle region, where a condition -1.ltoreq..alpha.<1 is fulfilled, and a second angle region, where a condition .alpha.<-1 or 1.ltoreq..alpha. is fulfilled. The first and the second angle region is represented by the direction parallel to the X-axis and the direction parallel to the Y-axis, respectively. When the image to be drawn is displayed on a display screen, in the image to be drawn, the parts belonging to the first angle region are drawn with a plurality of segments, each of which is parallel to the X-axis, and the parts blonging to the second angle region are drawn with a plurality of segments, each of which is parallel to the Y-axis. That is, the image to be drawn is displayed on the display screen by using only segments parallel to the X-axis and those parallel to the Y-axis.