Touch sensor, touch sensor driving method, and display device
A touch sensor may include a substrate and may include electrode units, first demultiplexers, second demultiplexers, and driving pads all located on the substrate. The electrode units each may include a plurality of electrode groups, the electrode groups each including a plurality of touch electrodes. The first demultiplexers each may include a plurality of sub-demultiplexers and each may be electrically connected to a corresponding one of the electrode units. Each of the sub-demultiplexers of a first demultiplexer may be electrically connected to a corresponding one of the electrode groups of a corresponding electrode unit. The second demultiplexers may be connected between the first demultiplexers and the driving pads.
1. A display device comprising:
a substrate including a first region and a second region;
pixels located on the first region;
an encapsulation layer covering the pixels;
electrode units located on the encapsulation layer and each including a plurality of electrode groups, the electrode groups each including a plurality of touch electrodes;
first demultiplexers located on the second region, each including a plurality of sub-demultiplexers, and each being electrically connected to a corresponding one of the electrode units, each of the sub-demultiplexers of a first demultiplexer being electrically connected to a corresponding one of the electrode groups of a corresponding electrode unit;
driving pads located on the second region; and
second demultiplexers located on the second region and connected between the first demultiplexers and the driving pads.
2. The display device of claim 1 , further comprising a display driver located on the second region for driving the pixels.
3. The display device of claim 2 , wherein the display driver is located between a first demultiplexer subset of the first demultiplexers and a second demultiplexer subset of the first demultiplexers, and wherein the display driver is located between a first demultiplexer subset of the second demultiplexers and a second demultiplexer subset of the second demultiplexers.
4. The display device of claim 2 , further comprising:
a connecting member electrically connected to the driving pads; and
a touch driving unit for supplying a driving signal to the driving pads through the connecting member.
5. The display device of claim 1 , further comprising:
a first voltage pad located on the second region; and
third demultiplexers located on the second region and connected between the electrode units and the first voltage pad.
6. The display device of claim 5 , further comprising:
a second voltage pad located on the second region; and
fourth demultiplexers located on the second region and connected between the electrode units and the second voltage pad.
7. The display device of claim 6 , wherein the first voltage pad provides a first voltage to the third demultiplexers,
wherein the second voltage pad provides a second voltage to the fourth demultiplexers, and
wherein a voltage value of the first voltage is higher than a voltage value higher of second voltage.