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:
Apr. 29, 2014
Filed:
Jan. 14, 2010
Kwang Deok Park, Incheon, KR;
Sang BO Cheong, Siheung-si, KR;
Jae Hong Joo, Seoul, KR;
Min Sung Yang, Seoul, KR;
Seong Hyun Nam, Anyang-si, KR;
Sang Chuel Lee, Anyang-si, KR;
Kwang Deok Park, Incheon, KR;
Sang Bo Cheong, Siheung-si, KR;
Jae Hong Joo, Seoul, KR;
Min Sung Yang, Seoul, KR;
Seong Hyun Nam, Anyang-si, KR;
Sang Chuel Lee, Anyang-si, KR;
AD Semiconductor Co., Ltd., Seoul, KR;
Abstract
The present invention relates to a resistive touchscreen for recognizing touch coordinates through a capacitor charging time constant, and more specifically, the invention comprises: an equal resistance line operating means for obtaining the same resistance line according to an (R+R) value and the same resistance line according to an (R+R) value by using the charge time constant after a charge time constant measuring means measures charge time constants of capacitors CL and CR; and a coordinate calculating means for obtaining intersecting points of the resistance lines, thereby perceiving the intersecting points as touch positions. According to the present invention, a conventional ADC (analog to digital converter) is not used because the touch positions can be perceived through the capacitor charging time constants, whereby the invention is advantageous for IC integration.