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:
Sep. 19, 1989
Filed:
Jul. 24, 1987
Applicant:
Inventors:
Assignees:
Fujitsu Limited, Kawasaki, JP;
Fujitsu Microcomputer Systems Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340799 ; 340750 ;
Abstract
A cathode ray tube controller holds a write-in address and displaying image data or a read-out address from a central processing unit. The cathode ray tube controller makes access to a memory by a write-in or read-out address from the central processing unit during a period in which the displaying image data in a horizontal scanning period are not read out from the memory, so that the read or write operation with respect to the memory can be carried out during the horizontal scanning period.