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. 01, 1986
Filed:
May. 24, 1983
Shigeo Tsujioka, Higashiyamato, JP;
Eiji Okamura, Owariasahi, JP;
Mitsuo Ooyama, Hachioji, JP;
Kimiaki Ando, Hachioji, JP;
Seiichi Kanema, Tokyo, JP;
Mitsugu Yoneyama, Tokorozawa, JP;
Toshihisa Aoshima, Tokyo, JP;
Kiyoshi Umezawa, Owariasahi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A graphic display apparatus for generating a vector comprises registers for storing a value R of a vector discrimination, a positive increment P and a negative increment N, and flip-flops for storing magnitude information of .DELTA.X, .DELTA.Y, and .DELTA.X and .DELTA.Y. An address counter of a refresh memory is counted up or down in accordance with the contents of those flip-flops. A control circuit for updating the value R of the vector discrimination is also provided, so that the vector can be generated at a high speed. The registers and the flip-flops are constructed in two stages so that data for generating the next vector can be prepared while the current vector is generated.