Touch sensor and touch input device thereof
A touch sensor minimizing the total number of channels for the touch sensor and a width of a bezel. The touch input device having a portrait shape in which a vertical length is greater than a horizontal length according to an embodiment includes: a touch sensor including a plurality of first electrodes arranged in the vertical direction and a plurality of second electrodes arranged in the horizontal direction; and a control unit electrically connected to the plurality of first electrodes and the plurality of second electrodes to control the touch sensor. The second electrode includes a pair of electrodes, one of the pair of electrodes of the second electrode is disposed adjacent to at least one electrode of the plurality of first electrodes, and the other of the pair of electrodes of the second electrode is disposed adjacent to at least one remaining electrode of the plurality of first electrodes.
1 . A touch input device having a portrait shape in which a vertical length is greater than a horizontal length, comprising:
a touch sensor comprising a plurality of first electrodes arranged in the vertical direction and a plurality of second electrodes arranged in the horizontal direction; and
a control unit electrically connected to the plurality of first electrodes and the plurality of second electrodes to control the touch sensor,
wherein each of the first electrodes consists of a single electrode portion,
wherein each of the second electrodes comprises a pair of electrode portions,
wherein the pair of electrode portions comprises a second-first electrode portion and a second-second electrode portion that are electrically separated from each other,
wherein the second-first electrode portion is configured to be disposed relatively closer to one first electrode of the plurality of first electrodes than the second-second electrode portion, and
wherein the second-second electrode portion is configured to be disposed relatively closer to another first electrode of the plurality of first electrodes than the second-first electrode portion.
2 . The touch input device of claim 1 , wherein the second-first electrode portion is not disposed directly adjacent to the another first electrode of the plurality of first electrodes.
3 . The touch input device of claim 1 , wherein the first electrode is a driving electrode, and the second electrode is a receiving electrode.
4 . The touch input device of claim 1 , wherein the first electrode is a receiving electrode, and the second electrode is a driving electrode.
5 . The touch input device of claim 1 , further comprising a display panel in which the touch sensor is disposed.
6 . The touch input device of claim 1 , further comprising a display panel disposed on or below the touch sensor.
7 . The touch input device of claim 1 , wherein the control unit controls a driving signal to be applied to the first electrode and detects a touch position of an object based on a third signal obtained by subtracting or differentially amplifying the first signal output from the second-first electrode portion and the second signal output from the second-second electrode portion.
8 . The touch input device of claim 1 , wherein the control unit controls a driving signal to be applied to the second electrode and applies the first signal applied to the second-first electrode portion and the second signal applied to the second-second electrode portion at the same time while phases thereof are shifted by 180°.
9 . The touch input device of claim 1 , wherein each of the plurality of second electrodes comprises electrode patterns of one group and electrode patterns of the other group, which are electrically separated from each other,
the electrode patterns of the one group and the electrode patterns of the other group are alternately arranged,
each of the plurality of second electrodes comprises a plurality of connection patterns, and
the plurality of connection patterns comprise first connection patterns configured to electrically connect the electrode patterns of the one group and second connection patterns configured to electrically connect the electrode patterns of the other group.
10 . The touch input device of claim 9 , wherein a portion of the first electrode directly adjacent to a periphery of the electrode pattern of the one group and a portion of the first electrode directly adjacent to a periphery of the electrode pattern of the other group are disposed together between the electrode pattern of the one group and the electrode pattern of the other group.
11 . The touch input device of claim 9 , wherein another first electrode disposed directly adjacent to a periphery of the electrode pattern of the other group is separated from the electrode pattern of the one group by the first electrode disposed directly adjacent to a periphery of the electrode pattern of the one group.
12 . The touch input device of claim 9 , wherein the first connection pattern is disposed so as not to overlap the electrode patterns of the other group, which are disposed between two electrode patterns connected by the first connection pattern.
13 . The touch input device of claim 9 , wherein each of the electrode patterns comprises a dummy pattern disposed in an opening defined therein.