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:
May. 08, 2012
Filed:
Jan. 22, 2009
Doo-hyung Woo, Anyang-si, KR;
Doo-Hyung Woo, Anyang-si, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
A light sensing circuit includes a sensor unit, a voltage generator and a readout circuit. The sensor unit includes a first sensor that detects an external light to output a first current value, a third sensor that detects an internal light generated from the backlight unit to output a third current value, and a second sensor that detects a peripheral light isolated from the external light and the internal light to output a second current value. The sensor unit outputs a first differential value between the third current value and the second current value and a second differential value between the first current value and the second current value. The voltage generator generates a reference voltage based on the first differential value and a sensing voltage based on the second differential value. The readout circuit outputs brightness information of the external light using the reference voltage and the sensing voltage.