Touch display panel and touch display device
AssigneeLG Display Co., Ltd.
InventorsCheolSe KIM, JuHan KIM
Life of this patent
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Abstract
A touch display panel and a touch display device. A shield electrode is disposed between a display electrode and touch electrodes, is driven using a signal corresponding to a signal applied to the touch electrodes. Display noise is blocked using the shield electrode, so that the sensitivity of touch sensing signals received from the touch electrodes are improved. In addition, due to the improved sensitivity of touch sensing signals, the performance of touch sensing based on a change in the self-capacitance of the touch electrodes is improved. Both a touch sensing function based on a change in the self-capacitance of the touch electrodes and a touch sensing function based on a change in the mutual capacitance of the touch electrodes are provided.
Claims18
A touch display device comprising:
- a display electrode configured to receive a display driving voltage;
- an encapsulation layer located above the display electrode;
- a plurality of touch electrodes, located above the encapsulation layer, configured to receive a touch driving signal;
- and
- a shield electrode, disposed between the encapsulation layer and the plurality of touch electrodes, configured to receive a shield signal corresponding to the touch driving signal.
A touch display device comprising:
- a display electrode to which a display driving voltage is applied;
- an encapsulation layer located above the display electrode;
- a plurality of first touch electrodes located above the encapsulation layer, wherein the plurality of first touch electrodes are connected in a first direction;
- a plurality of second touch electrodes located above the encapsulation layer, wherein the plurality of second touch electrodes are connected in a second direction, wherein the second direction intersects the first direction;
- a plurality of first shield electrodes located between the encapsulation layer and the plurality of first touch electrodes and wherein the plurality of first shield electrodes correspond to the plurality of first touch electrodes;
- a plurality of second shield electrodes located between the encapsulation layer and the plurality of second touch electrodes and wherein the plurality of first shield electrodes correspond to the plurality of second touch electrodes, respectively;
- and
- a driver circuit outputting a first touch driving signal to at least one first touch electrode among the plurality of first touch electrodes and receiving a first touch sensing signal, and outputting a second touch driving signal to at least one second touch electrode among the plurality of second touch electrodes and receiving a second touch sensing signal.
Dependencies are inferred from the claim text.