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:
Jun. 24, 2014
Filed:
Jun. 15, 2010
Kohei Tanaka, Osaka, JP;
Christopher Brown, Oxford, GB;
Kohei Tanaka, Osaka, JP;
Christopher Brown, Oxford, GB;
Sharp Kabushiki Kaisha, Osaka-shi, JP;
Abstract
Provided are an optical sensor having a wider dynamic range with reduced temperature dependence, and a display apparatus in which these optical sensors are used. An optical sensor includes an accumulation node (INT); a reset signal line (RST); a readout signal line (RWS); a photodiode (D) (photodetecting element); a photodiode (D) (reference element) that has a light-shielding layer; a thin-film transistor (M) (first switching element) that outputs a potential of the accumulation node (INT) in response to the readout signal during a sensing period; and a thin-film transistor (M) (second switching element) that is provided between the accumulation node (INT) and the photodiode (D), and that electrically separates the accumulation node (INT) from the photodiode (D) when the potential of the accumulation node (INT) upon supply of the readout signal is higher than a potential on a side of the photodiode (D) opposite to the accumulation node (INT).