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:
Feb. 19, 2008
Filed:
Sep. 15, 2005
Takahiko Murata, Osaka, JP;
Takumi Yamaguchi, Kyoto, JP;
Shigetaka Kasuga, Osaka, JP;
Shinji Yoshida, Osaka, JP;
Yoshito Ikeda, Osaka, JP;
Takahiko Murata, Osaka, JP;
Takumi Yamaguchi, Kyoto, JP;
Shigetaka Kasuga, Osaka, JP;
Shinji Yoshida, Osaka, JP;
Yoshito Ikeda, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An infrared sensor includes a series capacitor element and a reference capacitor element each exhibiting a predetermined capacitance value; an infrared-detecting capacitor element whose capacitance value varies depending on an intensity of infrared light incident on the element; and an output node being a node at which a first terminal of the series capacitor element, a first terminal of the reference capacitor element and a first terminal of the infrared-detecting capacitor element are connected to one another. The intensity of infrared light is output as a potential difference between the reference potential which is brought to a potential by applying a predetermined voltage between the series capacitor element and the reference capacitor element and the detection potential which is brought to a potential by applying a predetermined voltage between the series capacitor element and the infrared-detecting capacitor element.