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. 10, 2014
Filed:
Sep. 23, 2011
Toshio Miyazawa, Chiba, JP;
Atsushi Hasegawa, Togane, JP;
Terunori Saitou, Mobara, JP;
Kozo Yasuda, Mobara, JP;
Takeshi Yonekura, Chiba, JP;
Toshio Miyazawa, Chiba, JP;
Atsushi Hasegawa, Togane, JP;
Terunori Saitou, Mobara, JP;
Kozo Yasuda, Mobara, JP;
Takeshi Yonekura, Chiba, JP;
Japan Display Inc., Tokyo, JP;
Panasonic Liquid Crystal Display Co., Ltd., Hyogo, JP;
Abstract
A photosensor includes a lower electrode formed of a metal film, an amorphous silicon film disposed on the lower electrode, an n-type amorphous silicon film disposed on the amorphous silicon film, an upper electrode that is disposed on the n-type amorphous silicon film, and receives a first reference voltage, a capacitive element connected between the lower electrode and a second reference voltage, a switch circuit that inputs a first supply voltage to the lower electrode in an on-state, and puts the lower electrode into a floating state in an off-state, and a detector circuit that detects a voltage change in the lower electrode after irradiating the amorphous silicon film for a given period with light when the switch circuit is on.