Touch sensor driving device and display device comprising the same
AssigneeLG Display Co., Ltd.
InventorsDukhyo Lee, Beomjin Kim
Life of this patent
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Abstract
A touch sensor driving device comprises: a plurality of touch sensing circuits that receive touch sensor sensing signals from touch sensors of a touchscreen through a plurality of receiving channels; and a plurality of discharge circuits connected between the receiving channels and the touch sensing circuits to receive charge eliminating pulse signals and reduce the swing amplitude of the touch sensor sensing signals input into the touch sensing circuits.
Claims29
A touch sensitive display device comprising:
- at least one electrode;
- a touch sensor circuit comprising a first input terminal coupled to the at least one electrode;
- and
- a discharge circuit to discharge the first input terminal of the touch sensor circuit, the discharge circuit selectively connecting the first input terminal to a discharge path a plurality of times at predetermined intervals during a touch driving pulse of a touch sensing driving signal provided to the at least one electrode.
A driver circuit for a touch sensitive display device that comprises at least one electrode, the driver circuit comprising:
- a touch sensor circuit comprising a first input terminal for coupling to the at least one electrode;
- and
- a discharge circuit to discharge the first input terminal of the touch sensor circuit, the discharge circuit selectively connecting the first input terminal to a discharge path a plurality of times at predetermined intervals during a touch driving pulse of a touch sensing driving signal provided to the at least one electrode.
A method for operating a touch sensitive display device that comprises a display panel including at least one electrode and touch sensor circuit having an input terminal coupled to the least one electrode, the method comprising:
- driving a touch sensing driving signal to the at least one electrode, the touch sensing driving signal having a touch driving pulse;
- discharging the first input terminal of the touch sensor circuit by selectively connecting the first input terminal to a discharge path a plurality of times at predetermined intervals during the touch driving pulse of the touch sensing driving signal.
Dependencies are inferred from the claim text.