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US 2021/0200349 A1Published application
Touch sensing device and method for multi-driving
AssigneeSilicon Works Co., Ltd.
InventorsMohamed Gamal Ahmed MOHAMED, Jun Seop LEE, Mun Seok KANG
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Abstract
The present disclosure provides a touch sensing device reducing the touch driving time and the signal to noise ratio (SNR) by a multi-driving using driving signals that can be distinguished from each other by their frequencies and codes.
Claims15
A touch sensing device comprising:
- a driving circuit to supply to transmitting electrodes a plurality of first frequency driving signals having a first frequency and respectively representing different codes, and a plurality of second frequency driving signals having a second frequency and respectively representing different codes;
- a receiving circuit to receive a response signal from a receiving electrode coupled with the transmitting electrodes by capacitances;
- and
- a processing circuit to obtain a first frequency element corresponding to the first frequency and a second frequency element corresponding to the second frequency from the response signal, and decode the first frequency element and the second frequency element to generate touch raw data for intersection points of the transmitting electrodes and the receiving electrode.
1 more element
A method of sensing a touch, comprising:
- supplying to transmitting electrodes a plurality of first frequency driving signals having a first frequency and respectively representing different codes, and a plurality of second frequency driving signals having a second frequency and respectively representing different codes,;
- receiving a response signal to the plurality of first frequency driving signals and the plurality of second frequency driving signals from a receiving electrode coupled with the transmitting electrodes by capacitances;
- obtaining a first frequency element corresponding to the first frequency and a second frequency element corresponding to the second frequency from the response signal;
- decoding the first frequency element and the second frequency element to generate touch raw data for intersection points of the transmitting electrodes and the receiving electrode;
- and
- analyzing the touch raw data to generate touch data including touch coordinates.
3 more elements
A touch sensing device comprising:
- a driving circuit to supply at least one first frequency driving signal having a first frequency and at least one second frequency driving signal having a second frequency to transmitting electrodes;
- a receiving circuit to receive a response signal from a receiving electrode coupled with the transmitting electrodes by capacitances;
- and
- a processing circuit to obtain a first frequency element corresponding to the first frequency and a second frequency element corresponding to the second frequency from the response signal, to generate touch raw data for intersection points of the transmitting electrodes and the receiving electrode using the first frequency element and the second frequency element, and to extract a signal corresponding to a third frequency from the response signal to recognize a downlink signal from an active touch pen.
1 more element
Dependencies are inferred from the claim text.