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US 2020/0026406 A1Published application
Touch driving device and display device
AssigneeSilicon Works Co., Ltd.
InventorJung Min CHOI
Life of this patent
Estimating the term…
Abstract
A display device is configured to float a display electrode coupled to a touch sensor by parasitic capacitance when an uplink signal is transmitted to a touch pen through the touch sensor.
Claims16
A touch-driving device configured to transmit an uplink signal to a touch pen and receive a downlink signal from the touch pen, the touch-driving device comprising:
- an uplink controlling unit configured to transmit the uplink signal through a touch sensor while floating a display electrode, which forms a parasitic capacitance with the touch sensor therebetween, in a first time interval;
- and
- a downlink controlling unit configured to receive the downlink signal through the touch sensor in a second time interval which does not overlap the first time interval.
A display device comprising:
- a display electrode layer on which display electrodes are disposed;
- a touch sensor layer on which touch sensors are disposed;
- a display-driving device configured to supply a display-driving voltage to the display electrode;
- and
- a touch-driving device configured to transmit an uplink signal to a touch pen and receive a downlink signal from the touch pen, through the touch sensor,
- wherein parasitic capacitance is formed between the display electrode and the touch sensor, and the display electrode is floated when the touch-driving device transmits the uplink signal.
3 more elements
A display device comprising:
- a display electrode layer on which display electrodes are disposed;
- a touch sensor layer on which touch sensors are disposed;
- a display-driving device configured to supply a display-driving voltage to the display electrode;
- and
- a touch-driving device configured to transmit an uplink signal to a touch pen and receive a downlink signal from the touch pen, through the touch sensor,
- wherein a parasitic capacitance is formed between the display electrode and the touch sensor, and when the touch-driving device transmits the uplink signal, the display electrode is supplied with a modulation signal identical in phase to the uplink signal.
3 more elements
Dependencies are inferred from the claim text.