Title:
タッチパネルの制御回路及び制御方法
Document Type and Number:
Japanese Patent JP5502946
Kind Code:
B2
Abstract:
The present invention relates to a control circuit and control method for detecting the capacitance of a touch panel. The control circuit comprises: a signal-detecting circuit for charging a sensing wire of the touch panel to obtain an intensity signal of the sensing wire; an intensity/frequency conversion unit for converting the intensity signal into a frequency signal, the frequency of which corresponds to the level of the intensity signal; and a frequency-analyzing unit for analyzing the frequency signal to obtain a signal amount of the corresponding sensing wire. The control circuit for the capacitive touch panel has a good SNR, which will not be affected or lowered by noise signals in the circuit environment, and is constituted of simple components to reduce the occupied area on the chip and lower the cost.
Inventors:
Vermilion
Application Number:
JP2012160313A
Publication Date:
May 28, 2014
Filing Date:
July 19, 2012
Export Citation:
Assignee:
TPK TOUCH SOLUTIONS INC.
International Classes:
G06F3/041; G06F3/044
Domestic Patent References:
| JP2003294406A | ||||
| JP2010002949A | ||||
| JP2011028735A |
Attorney, Agent or Firm:
Ken Ieiri