Title:
DETECTION OF A CONDUCTIVE OBJECT DURING AN INITIALIZATION PROCESS OF A TOUCH-SENSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/096781
Kind Code:
A3
Abstract:
A method and system for detecting a presence of a conductive object proximate to a capacitive sense element during an initialization process of a touch-sensing device. A reference sense element is calibrated to produce a sensing parameter value. A capacitance of a plurality of capacitive sense elements is measured based on the sensing parameter value, and compared to a baseline capacitance value stored in a non- volatile memory of the touch-sensing device. The presence of a conductive object proximate to a capacitive sense element is detected when a difference between the measured capacitance and the stored baseline capacitance value is greater than a threshold value.
Inventors:
YOUNG KRISTOPHER L (US)
Application Number:
PCT/US2011/067148
Publication Date:
April 10, 2014
Filing Date:
December 23, 2011
Export Citation:
Assignee:
CYPRESS SEMICONDUCTOR CORP (US)
YOUNG KRISTOPHER L (US)
YOUNG KRISTOPHER L (US)
International Classes:
G06F3/041
Foreign References:
| US20100010330A1 | 2010-01-14 | |||
| US20090008161A1 | 2009-01-08 | |||
| US20090009491A1 | 2009-01-08 | |||
| US20080078590A1 | 2008-04-03 |
Attorney, Agent or Firm:
GRANGE, Kevin O. et al. (PC65 Livingston Avenu, Roseland NJ, US)
Download PDF: