SENSING METHODS FOR TOUCH SENSING DEVICES
First Claim
1. A sensing method for a touch sensing device which comprises a touch sensing array and an integrator, wherein the touch sensing array comprises a plurality of receiving electrodes disposed successively and a plurality of transmitting electrodes disposed successively and interlacing with the receiving electrodes, and the sensing method comprises:
- selecting one of the receiving electrodes to serve as a current receiving electrode;
connecting the current receiving electrode to the integrator;
resetting the integrator; and
measuring output signals corresponding to the current receiving electrode and the transmitting electrodes, wherein the step of measuring the output signals corresponding to the current receiving electrode and the transmitting electrodes comprises;
providing a first voltage to a previous transmitting electrode among the transmitting electrodes;
measuring an output voltage of the integrator in response to the first voltage on the previous transmitting electrode to obtain a previous integration value;
providing a second voltage to a current transmitting electrode among the transmitting electrodes;
measuring the output voltage of the integrator in response to the current voltage on the second transmitting electrode by the integrator to obtain a current integration value; and
calculating the difference between the previous integration value and the current integration value to obtain the output signal corresponding to the current receiving electrode and the current transmitting electrode.
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Accused Products
Abstract
A sensing method for a touch sensing device is provided. In one embodiment, for one set of interlaced receiving electrode and transmitting electrodes of the touch sensing device, an integrator coupled to the receiving electrode is reset only one time. In another embodiment, for each group of sensing electrodes, an integrator coupled to the sensing electrodes is reset only one time. Accordingly, the rate at which the touch sensing array is sensed may be increased. Noise reduced by the process of resetting the integrator due to charge injection effects may be decreased.
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Citations
19 Claims
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1. A sensing method for a touch sensing device which comprises a touch sensing array and an integrator, wherein the touch sensing array comprises a plurality of receiving electrodes disposed successively and a plurality of transmitting electrodes disposed successively and interlacing with the receiving electrodes, and the sensing method comprises:
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selecting one of the receiving electrodes to serve as a current receiving electrode; connecting the current receiving electrode to the integrator; resetting the integrator; and measuring output signals corresponding to the current receiving electrode and the transmitting electrodes, wherein the step of measuring the output signals corresponding to the current receiving electrode and the transmitting electrodes comprises; providing a first voltage to a previous transmitting electrode among the transmitting electrodes; measuring an output voltage of the integrator in response to the first voltage on the previous transmitting electrode to obtain a previous integration value; providing a second voltage to a current transmitting electrode among the transmitting electrodes; measuring the output voltage of the integrator in response to the current voltage on the second transmitting electrode by the integrator to obtain a current integration value; and calculating the difference between the previous integration value and the current integration value to obtain the output signal corresponding to the current receiving electrode and the current transmitting electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 19)
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10. A sensing method for a touch sensing device which comprises a touch sensing array and an integrator, wherein the touch sensing array comprises a plurality of first sensing electrodes disposed successively, and the sensing method comprises:
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resetting the integrator; and measuring output signals corresponding to the first sensing electrodes, wherein the step of measuring the output signals corresponding to the first sensing electrodes comprises; pre-charging a previous first sensing electrode among the first sensing electrodes to a first voltage; connecting the previous first sensing electrode to the integrator; measuring an output voltage of the integrator to obtain a previous first integration value; pre-charging a current first sensing electrode among the first sensing electrodes, to a second voltage; connecting the current first sensing electrode to the integrator; measuring the output voltage of the integrator to obtain a current first integration value; and calculating the difference between the previous first integration value and the current first integration value to obtain the output signal corresponding to the current first sensing electrode. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification