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:
Aug. 19, 2014
Filed:
Mar. 30, 2007
Yutaka Sano, Azumino, JP;
Takashi Kunimori, Azumino, JP;
Toshihiko Tanaka, Azumino, JP;
Masanori Yasumori, Azumino, JP;
Yutaka Sano, Azumino, JP;
Takashi Kunimori, Azumino, JP;
Toshihiko Tanaka, Azumino, JP;
Masanori Yasumori, Azumino, JP;
Japan Display West Inc., Aichi-Ken, JP;
Abstract
A liquid crystal display (LCD)according to an embodiment of the present invention includes a liquid crystal panel having a TFT substrate, a CF substrate, and a liquid crystal layerinterposed between the two substrates; a TFT ambient light photosensor having a semiconductor layerfor detecting external light; a photodetector unit LShaving a capacitor Cw in which a predetermined reference voltage is charged and a voltage charged by leakage current of the TFT ambient light photosensor is lowered; and an ambient light photosensor reader unit Refor reading a voltage charged in the capacitor for a predetermined read period. The photodetector unit is disposed on a first surface of the TFT substratethat is in contact with the liquid crystal layer, and the surface of the photodetector unit except for the semiconductor layerand its periphery is covered by a light-shielding layer. It is therefore possible to provide an LCD in which malfunction or reduced sensitivity of its ambient light photosensor due to light from its backlights is prevented with a simple structure.