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:
Sep. 03, 2013
Filed:
Jun. 08, 2010
Hiromi Katoh, Osaka, JP;
Yasuhiro Sugita, Osaka, JP;
Kohhei Tanaka, Osaka, JP;
Kaoru Yamamoto, Osaka, JP;
Naru Usukura, Osaka, JP;
Hiroaki Shigeta, Osaka, JP;
Hiromi Katoh, Osaka, JP;
Yasuhiro Sugita, Osaka, JP;
Kohhei Tanaka, Osaka, JP;
Kaoru Yamamoto, Osaka, JP;
Naru Usukura, Osaka, JP;
Hiroaki Shigeta, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A plurality of first and second sensor pixel circuits each sensing light during a designated sensing period and retaining the amount of sensed light otherwise are arranged in a pixel region. A backlight is turned on once for a predetermined time in one-frame period. A sensing period when the backlight is turned on and a sensing period when the backlight is turned off are set once, respectively, in the one-frame period. The first sensor pixel circuit is reset. The second sensor pixel circuit is reset. Read from sensor pixel circuits of two types is performed in parallel in a line sequential manner during a period other than the periods and. A difference circuit provided outside of the sensor pixel circuits is used for obtaining a difference between an amount of light when the backlight is turned on and an amount of light when the backlight is turned off.