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:
Nov. 20, 2001
Filed:
Nov. 03, 1998
Applicant:
Inventors:
Yoshihiro Terashima, Hiratsuka, JP;
Yukihiko Sakashita, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 5/00 ;
U.S. Cl.
CPC ...
G09G 5/00 ;
Abstract
A memory controller comprises a first counter and a second counter, each having reset and enable functions, a vertical synch signal detector and a horizontal synch signal detector. A reset signal for the first counter is controlled by a signal detected by the vertical synch signal detector. An enable signal for the first counter and a reset signal for the second counter are controlled by a signal detected by the horizontal synch signal detector. An enable signal for the second counter is controlled in accordance with a signal indicating an image effective period. A memory address is controlled by the first and second counters.