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. 23, 1980
Filed:
Aug. 22, 1979
Applicant:
Inventors:
Harushige Nakagaki, Toyokawa, JP;
Shigeki Inoue, Toyokawa, JP;
Assignee:
Hitachi, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455603 ; 3581941 ;
Abstract
An infrared remote-controlled receiver of the type comprising an infrared sensing element for receiving a signal transmitted by means of infrared radiation, and an amplifier for amplifying the signal detected by the sensing element, is further provided with detecting means for detecting the ambient luminance of the receiver (an interference signal) and gain control means for supplying the output signal of the detecting means to the amplifier to control its gain in accordance with the ambient luminance of the receiver.