Invention Grant
US08976122B2 Control unit, sensing device for a capacitive touch panel and method therefor
有权
控制单元，用于电容式触摸面板的感测装置及其方法
- Patent Title: Control unit, sensing device for a capacitive touch panel and method therefor
- Patent Title (中): 控制单元，用于电容式触摸面板的感测装置及其方法
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Application No.: US12457867Application Date: 2009-06-24
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Publication No.: US08976122B2Publication Date: 2015-03-10
- Inventor: Chin-Fu Chang , Cheng-Han Lee
- Applicant: Chin-Fu Chang , Cheng-Han Lee
- Applicant Address: TW Taipei
- Assignee: Egalax—Empia Technology Inc.
- Current Assignee: Egalax—Empia Technology Inc.
- Current Assignee Address: TW Taipei
- Agency: WPAT, PC
- Agent Justin King
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/045 ; G06F3/044
Abstract:
A noise reducing device for a capacitive touch panel and a method of reducing noise for a capacitive touch panel are disclosed to solve problems related to noise generated by a conventional filter circuit and an integrating circuit or external noise. In the invention, at least one switch circuit is used so that the conventional filter circuit and integrating circuit used in the prior are omitted. Signals output from a current measurement circuit are transmitting to a control unit to calculate the location of a touch point, reducing any noise.
Public/Granted literature
- US20100327881A1 Control unit, sensing device for a capacitive touch panel and method therefor Public/Granted day:2010-12-30
Information query
