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:
Aug. 28, 1990
Filed:
Jul. 27, 1989
Applicant:
Inventor:
Yoshiharu Tashiro, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350320 ; 2502 / ;
Abstract
A method for driving an optoelectronic switching device such as a pnpn semiconductor device comprises applying a predetermined biased voltage to the optoelectronic semiconductor device, and supplying plural light inputs to the optoelectronic semiconductor device to which the predetermined biased voltage is applied. The plural light inputs are supplied to the optoelectronic semiconductor device intermittently with a predetermined period before carriers excited by a first input pulse of the plural light inputs become extinct. As a result, the number of light sources is decreased.