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US 2020/0050339 A1Published application
Touch driving device and display device
AssigneeSilicon Works Co., Ltd.
InventorsJung Min Choi, Kyung Hwan Kim, Jae Duck Kim
Life of this patent
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Abstract
The present disclosure provides a display device configured to float a display electrode coupled to a touch sensor by a parasitic capacitance when a downlink signal is received from a touch pen to the touch sensor.
Claims15
A touch driving device, which transmits uplink signals to a touch pen and receives downlink signals from the touch pen, comprising:
- a touch driving part for transmitting the uplink signals through a touch sensor;
- and
- a touch sensing part for receiving the downlink signals through the touch sensor,
- wherein a display electrode coupled with the touch sensor by a parasitic capacitance is floated in a time interval in which the downlink signals are received.
1 more element
A display device comprising:
- a display electrode layer on which a display electrode is disposed;
- a touch sensor layer on which a touch sensor is disposed;
- a display driving device configured to supply display driving voltages to the display electrode;
- and
- a touch driving device configured to transmit uplink signals to a touch pen through the touch sensor and receive downlink signals from the touch pen,
- wherein a parasitic capacitance is formed between the display electrode and the touch sensor, and when the touch driving device receives the downlink signals, the display electrodes are floated.
3 more elements
A touch driving device configured to transmit uplink signals to a touch pen and receive downlink signals from the touch pen, comprising:
- a touch driving part configured to supply an uplink signal to a touch sensor to synchronize a clock of the touch driving device with that of the touch pen;
- a touch sensing part configured to receive a downlink signal from the touch sensor in a downlink time interval that the clock of the touch driving device indicates;
- and
- a modulation signal driving part configured to supply a modulation signal having a phase same as that of the downlink signal or different from that thereof by 180 degrees to a display electrode forming a parasitic capacitance with the touch sensor therebetween in the downlink time interval.
1 more element
Dependencies are inferred from the claim text.