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:
Sep. 30, 2014
Filed:
Jul. 12, 2010
Jin-woo Park, Yongin, KR;
Sang-uk Kim, Yongin, KR;
Hee-chul Hwang, Yongin, KR;
Mu-kyung Jeon, Yongin, KR;
Hideo Yoshimura, Yongin, KR;
Jin-Woo Park, Yongin, KR;
Sang-Uk Kim, Yongin, KR;
Hee-Chul Hwang, Yongin, KR;
Mu-Kyung Jeon, Yongin, KR;
Hideo Yoshimura, Yongin, KR;
Samsung Display Co., Ltd., Yongin-si, KR;
Abstract
A liquid crystal display (LCD) with a built-in touch screen includes: a first substrate including a sensor area having a plurality of photosensors; a second substrate positioned over the first substrate, and including a color filter, a light receiving portion, and a transparent electrode layer and a front polarizing plate; an LCD panel including a liquid crystal layer interposed between the first and second substrates; a touch screen driver circuit to measure a capacitance variation sensed through a first sensing line connected to the transparent electrode layer and to calculate a touch area using optical information sensed through a second sensing line connected to the photosensors when a contact object is in contact with the LCD panel, and to output position information of the contact object, sensed by determining whether a touch occurs and whether a multi-touch occurs using the capacitance variation and the touch area.