Invention Grant
US08963881B2 Low power switching mode driving and sensing method for capacitive multi-touch system
有权
用于电容式多点触摸系统的低功率开关模式驱动和感测方法
- Patent Title: Low power switching mode driving and sensing method for capacitive multi-touch system
- Patent Title (中): 用于电容式多点触摸系统的低功率开关模式驱动和感测方法
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Application No.: US13778304Application Date: 2013-02-27
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Publication No.: US08963881B2Publication Date: 2015-02-24
- Inventor: Hsin-Mao Huang , Chih-Hung Kung , Yen-Lin Huang , Ying-Che Hsu
- Applicant: Orise Technology Co., Ltd.
- Applicant Address: TW Hsinchu Science Park
- Assignee: Orise Technology Co., Ltd.
- Current Assignee: Orise Technology Co., Ltd.
- Current Assignee Address: TW Hsinchu Science Park
- Agency: Bacon & Thomas, PLLC
- Priority: TW101107194A 20120303
- Main IPC: G06F3/044
- IPC: G06F3/044 ; G06F1/32 ; G06F3/041

Abstract:
A low power switching mode driving and sensing method for capacitive multi-touch systems is used in a capacitive multi-touch system with a capacitive touch panel. When the capacitive touch system operates in an idle mode, the method uses a self-capacitance driving and sensing technology to detect touch points. When the touch points are detected on the capacitive touch panel, the capacitive touch system is switched to an active mode and uses a mutual-capacitance driving and sensing technology to detect touch points for accurately acquiring the positions related to the touch points detected. During a predetermined time interval in which there is no touch point detected, the method automatically performs a calibration to update a mutual-capacitance base image raw data and a self-capacitance base image raw data, so as to overcome the drifting of sensors of the capacitive touch system.
Public/Granted literature
- US20130229382A1 LOW POWER SWITCHING MODE DRIVING AND SENSING METHOD FOR CAPACITIVE MULTI-TOUCH SYSTEM Public/Granted day:2013-09-05
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