Touch input device including driving and receiving electrodes

1 . A touch input device having a touch surface, comprising:

a touch sensor comprising: a plurality of driving electrodes; and a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes;

a driving unit configured to apply a driving signal to at least one first driving electrode among the plurality of driving electrodes;

a touch detection unit configured to detect: a first sensing signal associated with a touch position of an object on the touch surface from a first receiving electrode among the plurality of receiving electrodes; and a second sensing signal associated with an LGM signal from a second receiving electrode that is not electrically connected to the first receiving electrode among the plurality of receiving electrodes; and

a control unit configured to: control the driving unit to apply the driving signal to the first driving electrode; and detect whether the object is touched and the touch position of the object based on a signal obtained by subtracting the second sensing signal from the first sensing signal,

wherein the first receiving electrode is at least one receiving electrode configured to form mutual capacitance with the first driving electrode among the plurality of receiving electrodes,

wherein the second receiving electrode is at least one receiving electrode configured not to form mutual capacitance with the first driving electrode among the plurality of receiving electrodes, and

wherein, when the control unit applies the driving signal to a second driving electrode that is not electrically connected to the first driving electrode, the first receiving electrode is configured not to form mutual capacitance with the second driving electrode, and the second receiving electrode is configured to form mutual capacitance with the second driving electrode.

2 . The touch input device of claim 1 , wherein the touch detection unit is configured to output a first digital data value of the first sensing signal and a second digital data value of the second sensing signal, and

wherein the control unit is configured to detect whether the object is touched and the touch position of the object based on a digital data value obtained by subtracting the second digital data value from the first digital data value.

3 . The touch input device of claim 1 , wherein the control unit is configured to subtract what is obtained by multiplying the second sensing signal by a predetermined factor from the first sensing signal.

4 . The touch input device of claim 1 , wherein the first sensing signal includes information on a change in capacitance in response to a touch of the object, and noise information,

wherein the second sensing signal includes the noise information, and

wherein the noise information includes display noise information, information on a change in capacitance in response to a change of images displayed on a display panel, and information on a change in capacitance in response to the LGM signal generated in a floating state.

5 . The touch input device of claim 1 , wherein the plurality of driving electrodes and the plurality of receiving electrodes are disposed together in a same layer,

wherein the plurality of receiving electrodes is arranged to be spaced apart from each other in each of a plurality of columns, and

wherein, with reference to each of the plurality of receiving electrodes, the plurality of driving electrodes is arranged, by at least three, to be symmetrical to one another at both sides of the each of the plurality of receiving electrodes.

6 . The touch input device of claim 5 , wherein at least one another driving electrode not electrically connected to the first driving electrode is disposed between the first driving electrode and the second receiving electrode.

7 . A touch input device having a touch surface, comprising:

a touch sensor comprising: a plurality of driving electrodes; and a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes;

a driving unit configured to apply a driving signal to at least one first driving electrode among the plurality of driving electrodes;

a touch detection unit configured to detect: a first sensing signal associated with a touch position of an object on the touch surface from a first receiving electrode among the plurality of receiving electrodes; and a second sensing signal associated with an LGM signal from a second receiving electrode among the plurality of receiving electrodes; and

a control unit configured to: control the driving unit to apply the driving signal to the first driving electrode; and detect whether the object is touched and the touch position of the object based on a signal obtained by subtracting the second sensing signal from the first sensing signal,

wherein the first receiving electrode is at least one receiving electrode immediately adjacent to the first driving electrode among the plurality of receiving electrodes,

wherein the second receiving electrode is at least one receiving electrode not immediately adjacent to the first driving electrode among the plurality of receiving electrodes, and

wherein, when the control unit applies the driving signal to a second driving electrode that is not electrically connected to the first driving electrode, the first receiving electrode is not immediately adjacent to the second driving electrode, and the second receiving electrode is immediately adjacent to the second driving electrode.

8 . The touch input device of claim 7 , wherein the touch detection unit is configured to output a first digital data value of the first sensing signal and a second digital data value of the second sensing signal, and

wherein the control unit is configured to detect whether the object is touched and the touch position of the object based on a digital data value obtained by subtracting the second digital data value from the first digital data value.

9 . The touch input device of claim 7 , wherein the control unit is configured to subtract what is obtained by multiplying the second sensing signal by a predetermined factor from the first sensing signal.

10 . The touch input device of claim 7 , wherein the first sensing signal includes information on a change in capacitance in response to a touch of the object, and noise information,

wherein the second sensing signal includes the noise information, and

wherein the noise information includes display noise information, information on a change in capacitance in response to a change of images displayed on a display panel, and information on a change in capacitance in response to the LGM signal generated in a floating state.

11 . The touch input device of claim 7 , wherein the plurality of driving electrodes and the plurality of receiving electrodes are disposed together in a same layer,

wherein the plurality of receiving electrodes is arranged to be spaced apart from each other in each of a plurality of columns, and

wherein, with reference to each of the plurality of receiving electrodes, the plurality of driving electrodes is arranged, by at least three, to be symmetrical to one another at both sides of the each of the plurality of receiving electrodes.

12 . The touch input device of claim 11 , wherein at least one another driving electrode not electrically connected to the first driving electrode is disposed between the first driving electrode and the second receiving electrode.

13 . A touch sensor, comprising:

a plurality of driving electrodes; and

a plurality of receiving electrodes electrically insulated from the plurality of driving electrodes,

wherein, when a driving signal is applied to at least one first driving electrode among the plurality of driving electrodes, a first sensing signal is configured to be output from at least one first receiving electrode immediately adjacent to the first driving electrode among the plurality of receiving electrodes, and a second sensing signal is configured to be output from at least one second receiving electrode not immediately adjacent to the first driving electrode among the plurality of receiving electrodes,

wherein, when the driving signal is applied to at least one second driving electrode immediately adjacent to the second receiving electrode among the plurality of driving electrodes, a third sensing signal is configured to be output from the second receiving electrode, and a fourth sensing signal is configured to be output from the first receiving electrode that is not directly adjacent to the second driving electrode,

wherein the first sensing signal and the third sensing signal include: information on a change in capacitance in response to a touch of an object; and noise information, and the second sensing signal and the fourth sensing signal include the noise information, and

wherein the second driving electrode is not electrically connected to the first driving electrode.

14 . The touch sensor of claim 13 , wherein the noise information includes display noise information, information on a change in capacitance in response to a change of images displayed on a display panel, and information on a change in capacitance in response to an LGM signal generated in a floating state.

15 . The touch sensor of claim 13 , wherein the plurality of driving electrodes and the plurality of receiving electrodes are disposed together in a same layer,

wherein the plurality of receiving electrodes is arranged to be spaced apart from each other in plurality in each of a plurality of columns, and

wherein, with reference to each of the plurality of receiving electrodes, the plurality of driving electrodes is arranged, by at least three, to be symmetrical to one another at both sides of the each of the plurality of receiving electrodes.

16 . The touch sensor of claim 15 , wherein at least one another driving electrode not electrically connected to the first driving electrode is disposed between the first driving electrode and the second receiving electrode.