Touch display device, driving method, and driving circuit
AssigneeLG Display Co., Ltd.
InventorsCheolSe Kim, HoonBae Kim, SunYeop Kim
Life of this patent
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Abstract
Embodiments of the present disclosure relate to a touch display device, a driving method, and a driving circuit. More particularly, embodiments of the present disclosure relate to a touch display device, a driving method, and a driving circuit capable of preventing touch sensitivity from being affected by display driving even though simultaneously performing the display driving and touch driving by supplying a data voltage to a plurality of data lines disposed in a display panel, supplying a common voltage to a plurality of common electrodes disposed in the display panel, displaying an image through the display panel, and supplying a common voltage to the common electrodes.
Claims20
A touch display device comprising:
- a display panel including a plurality of data lines, a plurality of gate lines, a plurality of sub-pixels defined by the plurality of data lines and the plurality of gate lines, and a plurality of touch electrodes;
- and
- a first circuit configured to supply a data signal to the plurality of data lines, and supply a touch driving signal that alternates between a first constant voltage and a second constant voltage that is different from the first constant voltage to the plurality of touch electrodes,
- wherein the touch driving signal includes a first signal section having the first constant voltage, a second signal section having the second constant voltage, and a transition section between the first signal section and the second signal section,
- wherein the data signal includes a transition section in which a voltage level is changed, and
- wherein the first signal section of the touch driving signal overlaps with the transition section of the data signal.
A driving circuit of a touch display device comprising a display panel including plurality of data lines, a plurality of gate lines, a plurality of sub-pixels defined by the plurality of data lines and the plurality of gate lines, and a plurality of touch electrodes, the driving circuit comprising:
- a first driving circuit configured to supply a data signal to the plurality of data lines;
- and
- a second driving circuit configured to supply a touch driving signal that alternates between a first constant voltage and a second constant voltage that is different from the first constant voltage to the plurality of touch electrodes,
- wherein the touch driving signal includes a first signal section having the first constant voltage, a second signal section having the second constant voltage, and a transition section between the first signal section and the second signal section,
- wherein the data signal includes a transition section in which the voltage level is changed, and
- wherein the first signal section of the touch driving signal overlaps with the transition section of the data signal.
Dependencies are inferred from the claim text.