Invention Grant
- Patent Title: Method for controlling a capacitive touch pad
- Patent Title (中): 用于控制电容式触摸板的方法
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Application No.: US14592194Application Date: 2015-01-08
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Publication No.: US09542035B2Publication Date: 2017-01-10
- Inventor: Maxime Teissier , Laurent Beyly , Cyril Troise
- Applicant: STMicroelectronics (Rousset) SAS
- Applicant Address: FR Rousset
- Assignee: STMicroelectronics (Rousset) SAS
- Current Assignee: STMicroelectronics (Rousset) SAS
- Current Assignee Address: FR Rousset
- Agency: Seed IP Law Group LLP
- Priority: FR1004670 20101201
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/044 ; H03K17/955 ; H03K17/96

Abstract:
The present disclosure relates to a method for measuring a capacitance of a pair of electrodes including charging the pair of electrodes and transferring the charge between the pair of electrodes and a sampling capacitor, and a measuring step representative of the capacitance of the pair of electrodes according to the voltage at the terminals of the sampling capacitor according to the number of cycles executed so that the voltage at the terminals of the sampling capacitor reaches a threshold voltage. According to the present disclosure, the method comprises an initial step of charging the sampling capacitor between a first voltage and a second intermediate voltage in between the first voltage and a third voltage greater than or equal to a ground voltage, the pair of electrodes being charged between the second voltage and the third voltage. The present disclosure applies in particular to the control of a touch pad.
Public/Granted literature
- US20150123943A1 METHOD FOR CONTROLLING A CAPACITIVE TOUCH PAD Public/Granted day:2015-05-07
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