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. 22, 2012
Filed:
Jul. 13, 2009
Soon-sung Ahn, Suwon-si, KR;
Yong-sung Park, Suwon-si, KR;
Do-youb Kim, Suwon-si, KR;
Deok-young Choi, Suwon-si, KR;
In-ho Choi, Suwon-si, KR;
Soon-Sung Ahn, Suwon-si, KR;
Yong-Sung Park, Suwon-si, KR;
Do-Youb Kim, Suwon-si, KR;
Deok-Young Choi, Suwon-si, KR;
In-Ho Choi, Suwon-si, KR;
Samsung Mobile Display Co., Ltd., Yongin, KR;
Abstract
Provided is a driving circuit of a photosensing touch panel including: a first photodiode coupled between a first voltage source and a sensing node and for generating a first current in accordance with a brightness of an external incident light and a heat of a finger; a second photodiode coupled between the sensing node and a second voltage source and for generating a second current in accordance with the heat of the finger, the second photodiode being shielded from the external incident light; and an amplifier circuit for detecting the brightness of the external incident light regardless of the heat of the finger by subtracting the second current from the first current at the sensing node.