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:
Dec. 25, 1990
Filed:
Jan. 12, 1990
Yoshimichi Kudo, Yokohama, JP;
Shigeru Komatsu, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A frame buffer memory capable of storing video data for plural frames of pictures with memory areas irrelevant to the display being reduced to a minimum, which video data consist of a number of pixels unequal to a power of '2' in the vertical and horizontal directions, respectively. The frame buffer memory is realized by using multi-port video RAMs and includes a plurality of regions for display and auxiliary regions. The regions for display includes at least first and second display regions which partially overlap each other. The auxiliary regions store the video data contained in the overlapping portion (overlapping region) of the first and second display regions, the video data stored in the auxiliary region being transferred to the overlapping region as occasion requires.