Concurrent driving capacitive touch sensing device capable of resending drive signals
First Claim
1. A concurrent driving capacitive touch sensing device comprising:
- a capacitive sensing matrix comprising a plurality of drive electrodes and a plurality of sense electrodes configured to form coupling capacitance;
a drive end configured toconcurrently input cycle data of encoded and modulated drive signals into the drive electrodes, andconcurrently input a plurality of cycle data into the drive electrodes in each of a plurality of drive time slots of a frame of the capacitive sensing matrix, and the cycle data within a same drive time slot and corresponding to a same drive electrode are identical; and
a detection end coupled to one of the sense electrodes and configured toacquire a predetermined number of sampled values corresponding to the cycle data associated with the coupled sense electrode and generate a response signal to the drive end according to the sampled values, andbe sequentially coupled to the sense electrodes of the capacitive sensing matrix so as to acquire the predetermined number of sampled values corresponding to each of the cycle data of each of the drive time slots, and generate a detection signal according to notch filtering or standard deviation of the sampled values of each of the drive time slots,wherein the drive end resends the cycle data according to the response signal.
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Abstract
There is provided a concurrent driving capacitive touch sensing device including a drive end, a capacitive sensing matrix and a detection end. The capacitive sensing matrix includes a plurality of drive electrodes and sense electrodes crossing to each other. The drive end is configured to concurrently input cycle data of encoded and modulated drive signals into the drive electrodes. The detection end is coupled to one of the sense electrodes and configured to acquire a predetermined number of sampled values corresponding to the cycle data associated with the coupled sense electrode and generate a response signal to the drive end according to the sampled values, wherein the drive end resends the cycle data according to the response signal.
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Citations
18 Claims
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1. A concurrent driving capacitive touch sensing device comprising:
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a capacitive sensing matrix comprising a plurality of drive electrodes and a plurality of sense electrodes configured to form coupling capacitance; a drive end configured to concurrently input cycle data of encoded and modulated drive signals into the drive electrodes, and concurrently input a plurality of cycle data into the drive electrodes in each of a plurality of drive time slots of a frame of the capacitive sensing matrix, and the cycle data within a same drive time slot and corresponding to a same drive electrode are identical; and a detection end coupled to one of the sense electrodes and configured to acquire a predetermined number of sampled values corresponding to the cycle data associated with the coupled sense electrode and generate a response signal to the drive end according to the sampled values, and be sequentially coupled to the sense electrodes of the capacitive sensing matrix so as to acquire the predetermined number of sampled values corresponding to each of the cycle data of each of the drive time slots, and generate a detection signal according to notch filtering or standard deviation of the sampled values of each of the drive time slots, wherein the drive end resends the cycle data according to the response signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A concurrent driving capacitive touch sensing device comprising:
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a capacitive sensing matrix comprising a plurality of drive electrodes and a plurality of sense electrodes configured to form coupling capacitance; a drive end configured to concurrently input a plurality of cycle data of encoded and modulated drive signals into the drive electrodes in each of a plurality of drive time slots of a frame of the capacitive sensing matrix; and a detection end coupled to one of the sense electrodes and configured to acquire a predetermined number of sampled values corresponding to each of the cycle data of the drive time slots associated with the coupled sense electrode and generate a response signal to the drive end according to the sampled values, sequentially couple to the sense electrodes of the capacitive sensing matrix so as to acquire the predetermined number of sampled values corresponding to each of the cycle data of each of the drive time slots; and generate a detection signal according to notch filtering or standard deviation of the sampled values of each of the drive time slots, wherein the drive end extends the associated drive time slot according to the response signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A concurrent driving capacitive touch sensing device comprising:
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a capacitive sensing matrix comprising a plurality of drive electrodes and a plurality of sense electrodes configured to form coupling capacitance; a drive end configured to concurrently input a plurality of cycle data of encoded and modulated drive signals into the drive electrodes in each of a plurality of drive time slots of a frame of the capacitive sensing matrix, wherein an cycle number of the cycle data of at least a part of the drive time slots is larger than a predetermined cycle number; and a detection end configured to be sequentially coupled to the sense electrodes of the capacitive sensing matrix and decode a detection matrix obtained by detecting channels of the drive electrodes and the sense electrodes so as to generate a two-dimensional detection vector corresponding to each of the channels. - View Dependent Claims (16, 17, 18)
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Specification