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. 13, 2009
Filed:
Oct. 18, 2006
Applicant:
Motoharu Kishi, Kanagawa, JP;
Inventor:
Motoharu Kishi, Kanagawa, JP;
Assignee:
NEC Electronics Corporation, Kawasaki, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A photocoupler includes a LED for emitting light in accordance with an input electrical signal, a driver for supplying an electrical signal to the LED, a light receiver placed face to face with the LED and having a photodiode for receiving light emitted by the LED, and a half mirror placed between the LED and the photodiode, for changing the direction of light emitted by the LED. The photocoupler controls the current to be supplied to the LED in accordance with the reflected light by the half mirror to uniformize the light emission intensity of the LED.