Touch sensing device and display device including the same
A touch sensing device and a display device for improving hovering performance including: a touch sensing display panel including sense electrodes arranged in a matrix; and a sensing signal controller connected to the touch sensing display panel. The sense electrode includes a metal mesh electrode and a conductive layer contacting the metal mesh electrode.
1. A display device comprising:
a thin film transistor array panel comprising a plurality of pixels;
a touch sensing display panel overlapping the thin film transistor array panel and comprising a plurality of sense electrodes arranged in a matrix; and
a sensing signal controller connected to the touch sensing display panel,
wherein:
each of the plurality of sense electrodes comprises:
a metal mesh electrode having a lattice shape and comprising a plurality of openings; and
a conductive layer contacting the metal mesh electrode;
a first portion of the sense electrodes from the plurality of sense electrodes are sense input electrodes, and a second portion of the sense electrodes from the plurality of sense electrodes are sense output electrodes, and the sense input electrodes and the sense output electrodes are alternately disposed in a column direction in a same layer; and
a capacitance formed between adjacent metal mesh electrodes is different from a capacitance formed between adjacent conductive layers.
2. The display device of claim 1 , wherein the conductive layer is disposed between the metal mesh electrode and a substrate.
3. The display device of claim 1 , wherein the metal mesh electrode is disposed between the conductive layer and a substrate.
4. The display device of claim 1 , wherein:
the plurality of openings are filled with the conductive layer; and
the conductive layer in each of the plurality of sense electrodes is separated from each other.
5. The display device of claim 1 , wherein the metal mesh electrode and the conductive layer form a unit for sensing a touch and a plurality of the units are disposed in a same layer.
6. The display device of claim 5 , wherein the units do not overlap each other along the direction of thickness.
7. The display device of claim 1 , wherein a plurality of the metal mesh electrodes separated from each other are disposed along a column direction.
8. A display device comprising:
a thin film transistor array panel comprising a plurality of pixels;
a touch sensing display panel overlapping the thin film transistor array panel and comprising a plurality of sense electrodes arranged in a matrix; and
a sensing signal controller connected to the touch sensing display panel,
wherein:
each of the plurality of sense electrodes comprises:
a metal mesh electrode having a lattice shape and comprising a plurality of openings; and
a conductive layer contacting the metal mesh electrode;
a first portion of the sense electrodes from the plurality of sense electrodes are sense input electrodes, and a second portion of the sense electrodes from the plurality of sense electrodes are sense output electrodes, and the sense input electrodes and the sense output electrodes are disposed in a same layer; and
a capacitance formed on the conductive layer is configured to increase sensitivity for a touch in a vertical direction with the substrate.
9. A display device comprising:
a thin film transistor array panel comprising a plurality of pixels;
a touch sensing display panel overlapping the thin film transistor array panel and comprising a plurality of sense electrodes arranged in a matrix; and
a sensing signal controller connected to the touch sensing display panel,
wherein:
each of the plurality of sense electrodes comprises:
a metal mesh electrode having a lattice shape and comprising a plurality of openings; and
a conductive layer contacting the metal mesh electrode;
a first portion of the sense electrodes from the plurality of sense electrodes are sense input electrodes, and a second portion of the sense electrodes from the plurality of sense electrodes are sense output electrodes, and the sense input electrodes and the sense output electrodes are disposed in a same layer; and
a capacitance formed between the adjacent metal mesh electrodes is different from a capacitance formed between the adjacent conductive layers.
10. The display device of claim 9 , wherein the capacitance formed between the adjacent metal mesh electrodes is lower than the capacitance formed between the adjacent conductive layers.