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. 13, 1994
Filed:
Mar. 22, 1993
Seiji Uchiyama, Tokyo, JP;
Akio Noguchi, Ebina, JP;
Yukihide Ushio, Tokyo, JP;
Shimpei Matsuo, Tokyo, JP;
Yoji Serizawa, Yokohama, JP;
Kazuro Yamada, Tokyo, JP;
Makoto Takeuchi, Yokohama, JP;
Hiroyuki Nakamura, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A driver IC for driving a light source comprises means for generating a constant current, switching means for switching the constant current supplied to the light source, first input terminal for inputting a first signal to modulate a light emitted by the light source, said switching means performing a switching operation in accordance with the first signal, and second input terminal for inputting a second signal so as to supply the constant current to the light source, irrespective of the first signal.