Title:
CAPACITIVE TOUCH SENSOR
Document Type and Number:
WIPO Patent Application WO/2012/008633
Kind Code:
A1
Abstract:
The present invention relates to a capacitive touch sensor, and relates to a touch sensor which precisely senses whether there is any touch, not by using a reference voltage or reference current in the touch sensor but by transforming data between neighbouring channels into two types of data of different polarities and by comparing the same. The invention makes it possible to miniaturize the structure of a touch sensor and to ensure compatibility allowing application to a variety of touch panels by minimizing the influence of noise from the outside environment. More specifically, the present invention provides a capacitive touch sensor comprising: one or more receiver channel (RX) which outputs analogue data of a voltage for capacitive change caused by the presence or absence of transmitter channel (TX) pulse impression and touch; one or more receiver unit which is connected to the receiver channel (RX), receives the analogue data of the voltage, and outputs bipolar pulse width modulation signals; a counter which periodically operates in accordance with reset (RST) signals; and one or more flip-flop which outputs, as digital data, the bipolar pulse width modulation signals input from the receiver unit(s), by using count values received from the counter.
Inventors:
KIM JIN HYUK (KR)
KIM JONG SUN (KR)
KIM JONG SUN (KR)
Application Number:
PCT/KR2010/004620
Publication Date:
January 19, 2012
Filing Date:
July 15, 2010
Export Citation:
Assignee:
SILICONINSIDE CO LTD (KR)
KIM JIN HYUK (KR)
KIM JONG SUN (KR)
KIM JIN HYUK (KR)
KIM JONG SUN (KR)
International Classes:
G06F3/044
Foreign References:
| KR20100013386A | 2010-02-10 | |||
| KR100940907B1 | 2010-02-08 | |||
| KR100919212B1 | 2009-09-28 | |||
| US20090009486A1 | 2009-01-08 | |||
| JP2009015492A | 2009-01-22 |
Attorney, Agent or Firm:
HWANG, E-Nam (KR)
황이남 (KR)
황이남 (KR)
Download PDF:
Claims: