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:
Nov. 20, 2012
Filed:
Feb. 23, 2009
Wing Chi Stephen Chan, Kowloon, HK;
Wai Pak Choi, Tai Po, HK;
Wai Kin Cheng, Tsuen Wan, HK;
Kwok Wah Chu, Kowloon, HK;
Siu Hong Lui, Tai Koo Shing, HK;
Yao LU, Guangzhou, HK;
Wai Hon NG, Cho Yiu Estate, HK;
Wing Chi Stephen Chan, Kowloon, HK;
Wai Pak Choi, Tai Po, HK;
Wai Kin Cheng, Tsuen Wan, HK;
Kwok Wah Chu, Kowloon, HK;
Siu Hong Lui, Tai Koo Shing, HK;
Yao Lu, Guangzhou, HK;
Wai Hon Ng, Cho Yiu Estate, HK;
Solomon Systech Limited, Shatin, New Territories, HK;
Abstract
A controller for detection of touches by a single finger or multiple fingers on a touch panel, the touch panel including a first group of electrodes arranged in a first direction and a second group of electrodes arranged in a second direction, thereby forming a plurality of crossover points. The controller includes: a plurality of signal drivers coupled to the first group of electrodes and configured to excite the first group of electrodes sequentially using a spread spectrum signal; a plurality of signal sensors coupled to the second group of electrodes and configured to detect peaks and troughs of capacitive coupled signals at the second group of electrodes, the detecting being performed simultaneously for the crossover points along a current one of the first group of electrodes that is being excited; and a signal processing device configured to detect the touches on the touch panel and to determine touch positions and touch movements, based on the detected peaks and troughs of the capacitive coupled signals.