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:
Dec. 20, 2011
Filed:
Feb. 19, 2009
Hsi-rong Han, Tai Chung County, TW;
Chien-ting Chan, Chang Hua County, TW;
Hsi-Rong Han, Tai Chung County, TW;
Chien-Ting Chan, Chang Hua County, TW;
Wintek Corporation, Taichung, TW;
Abstract
A photosensor for a display device includes a light receiver, a reset unit, and a sample unit. The light receiver is used for receiving ambient light to generate a photovoltage. The light receiver includes a first transistor and a first conversion unit that transforms the output of the first transistor into the photovoltage. The reset unit is used for providing an initiated reference voltage in response to a reset signal and includes a second transistor and a third transistor that are connected with each other, where the first conversion unit is discharged through the third transistor to obtain the initiated reference voltage when the second transistor is turned on. The sample unit is used for outputting the photovoltage in respond to a sample signal, the sample unit comprising a fourth transistor in respond to the sample signal and a second conversion unit that transforms the output of the fourth transistor into the photovoltage.