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:
Mar. 16, 2010
Filed:
Aug. 11, 2008
Applicant:
Katsuhiko Morosawa, Tachikawa, JP;
Inventor:
Katsuhiko Morosawa, Tachikawa, JP;
Assignee:
Casio Computer Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01J 40/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical sensor includes a photoelectric converter to receive external light and to output a photocurrent signal according to the illuminance of the external light. A current-to-voltage converter converts the photocurrent signal output from the photoelectric converter to a voltage signal. A voltage amplifier amplifies the voltage signal. A current amplifier outputs a current signal corresponding to the voltage signal amplified by the voltage amplifier. Each of the photoelectric converter, current-to-voltage converter, voltage amplifier and current amplifier includes at least one thin-film transistor.