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:
Jan. 31, 1989
Filed:
Nov. 26, 1984
Toyota Honda, Yokohama, JP;
Shigeru Hirahata, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
This invention is so arranged that, in a dynamic random access memory including a display memory area storing therein the display data and a system memory area employed for arithmetic operation in a central processing unit, memory refresh is accomplished by a display address signal applied to the dynamic random access memory when information stored in the dynamic random access memory is utilized for display, and a refresh address signal from a refresh counter for generating such a refresh address signal is applied to the random access memory as a burst signal for a predetermined period at predetermined intervals during a display frame time, thus refreshing memory, when information stored in the dynamic random access memory is not utilized for display.