Fingerprint recognition touch sensor and electronic apparatus including the same

1. A touch sensor comprising:

a plurality of parallel transmitting lines extending in a first direction;

a plurality of parallel receiving lines extending in a second direction crossing the first direction;

a transmitting driver configured to:

in a first mode, apply first driving signals of a first voltage, to the plurality of transmitting lines; and

in a second mode, apply second driving signals of a second voltage, to the plurality of transmitting lines, the second voltage being different than the first voltage;

a plurality of receiving groups disposed in the first direction, and configured to receive touch signals, each of the plurality of receiving groups comprising adjacent ones of the plurality of receiving lines;

a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; and

a plurality of second receiving circuits,

wherein each of the plurality of second receiving circuits is disposed to correspond to a respective one of the plurality of receiving groups.

2. The touch sensor of claim 1 , wherein the transmitting driver is further configured to, in the first mode, sequentially apply one of the first driving signals of the first voltage, to each of the plurality of transmitting lines.

3. The touch sensor of claim 2 , wherein the transmitting driver comprises a plurality of transmitting groups disposed in the second direction, and

wherein each of the plurality of transmitting groups comprises adjacent ones of the plurality of transmitting lines.

4. The touch sensor of claim 3 , wherein the transmitting driver is further configured to, in the second mode, sequentially apply the second driving signals of the second voltage, to each of the plurality of transmitting groups.

5. The touch sensor of claim 3 , wherein the plurality of transmitting groups comprise a first transmitting group and a second transmitting group adjacent to the first transmitting group, and

wherein the transmitting driver is further configured to, in the second mode, apply the second driving signals of the second voltage simultaneously to first ones of the plurality of transmitting lines that are disposed in the first transmitting group, and then apply the second driving signals of the second voltage simultaneously to the second ones of the plurality of transmitting lines that are disposed in the second transmitting group.

6. The touch sensor of claim 3 , wherein the transmitting driver comprises:

a plurality of transmitting circuits connected to the plurality of transmitting lines, respectively;

a first voltage line configured to supply the first voltage to the plurality of transmitting circuits; and

a second voltage line configured to supply the second voltage to the plurality of transmitting circuits.

7. The touch sensor of claim 6 , wherein the transmitting driver is further configured to:

in the first mode, connect the first voltage line to the plurality of transmitting circuits; and

in the second mode, connect the second voltage line to the plurality of transmitting circuits.

8. The touch sensor of claim 7 , wherein the transmitting driver is further configured to:

in the first mode, sequentially and separately activate the plurality of transmitting circuits; and

in the second mode, simultaneously activate ones of the plurality of transmitting circuits that are disposed in one of the plurality of transmitting groups.

9. The touch sensor of claim 1 , further comprising a control circuit configured to, in the first mode, control to connect the plurality of receiving lines respectively to the plurality of first receiving circuits, so that the plurality of first receiving circuits simultaneously receive the touch signals through all of the plurality of receiving lines respectively connected to the plurality of first receiving circuits.

10. The touch sensor of claim 1 , further comprising a control circuit configured to, in the second mode, control to connect ones of the plurality of receiving lines that are disposed in one of the plurality of receiving groups to one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups, so that the plurality of second receiving circuits receive the touch signals through the one of the plurality of second receiving circuits connected to the ones of the plurality of receiving lines.

11. The touch sensor of claim 1 , wherein each of the plurality of first receiving circuits comprises a first feedback capacitor having a first capacitance, and

wherein each of the plurality of second receiving circuits comprises a second feedback capacitor having a second capacitance greater than the first capacitance.

12. The touch sensor of claim 3 , wherein the transmitting driver is further configured to, in a third mode, apply third driving signals of a third voltage lower than the first voltage and higher than the second voltage, to first ones of the plurality of transmitting lines that are sequentially disposed in one of the plurality of transmitting groups, and then apply the third driving signals of the third voltage to second ones of the plurality of transmitting lines that are sequentially disposed in the one of the plurality of transmitting groups.

13. The touch sensor of claim 12 , wherein the transmitting driver comprises:

a plurality of transmitting circuits connected to the plurality of transmitting lines, respectively;

a first voltage line configured to supply the first voltage to the plurality of transmitting circuits;

a second voltage line configured to supply the second voltage to the plurality of transmitting circuits; and

a third voltage line configured to supply the third voltage to the plurality of transmitting circuits.

14. The touch sensor of claim 13 , wherein the transmitting driver is further configured to:

in the first mode, connect the first voltage line to the plurality of transmitting circuits;

in the second mode, connect the second voltage line to the plurality of transmitting circuits; and

in the third mode, connect the third voltage line to the plurality of transmitting circuits.

15. The touch sensor of claim 14 , wherein the transmitting driver is further configured to:

in the first mode, sequentially and separately activate the plurality of transmitting circuits;

in the second mode, simultaneously activate first ones of the plurality of transmitting circuits that are disposed in the one of the plurality of transmitting groups; and

in the third mode, simultaneously activate second ones of the plurality of transmitting circuits that are connected to the first ones of the plurality of transmitting lines in the one of the plurality of transmitting groups, and then simultaneously activate third ones of the plurality of transmitting circuits that are connected to the second ones of the plurality of transmitting lines.

16. The touch sensor of claim 12 , wherein the signal output unit comprises a plurality of receiving groups disposed in the first direction,

wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines, and

wherein the signal output unit further comprises:

a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; and

a plurality of second receiving circuits disposed to correspond to the plurality of receiving groups, respectively.

17. The touch sensor of claim 16 , wherein the signal output unit is further configured to, in the third mode, receive the touch signals by connecting first ones of the plurality of receiving lines that are sequentially disposed in one of the plurality of receiving groups, to one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups, and then receive the touch signals by connecting second ones of the plurality of receiving lines that are sequentially disposed in the one of the plurality of receiving groups, to the one of the plurality of second receiving circuits corresponding to the one of the plurality of receiving groups.

18. The touch sensor of claim 12 , wherein the signal output unit comprises a plurality of receiving groups disposed in the first direction,

wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines, and

wherein the signal output unit further comprises:

a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively;

a second receiving circuit disposed to correspond to first ones of the plurality of receiving lines that are sequentially disposed in each of the plurality of receiving groups; and

a third receiving circuit disposed to correspond to second ones of the plurality of receiving lines that are sequentially disposed in each of the plurality of receiving groups.

19. The touch sensor of claim 18 , wherein the signal output unit is further configured to, in the third mode, receive the touch signals by connecting the first ones of the plurality of receiving lines sequentially disposed in each of the plurality of receiving groups, to the second receiving circuit, while receiving the touch signals by connecting the second ones of the plurality of receiving lines sequentially disposed in each of the receiving groups, to the third receiving circuit.

20. The touch sensor of claim 12 , wherein the signal output unit comprises a plurality of receiving groups disposed in the first direction,

wherein each of the plurality of receiving groups comprises adjacent ones of the plurality of receiving lines, and

wherein the signal output unit comprises a plurality of receiving circuits disposed to correspond to the plurality of receiving lines, respectively.

21. The touch sensor of claim 20 , wherein the signal output unit is further configured to:

in the first mode, connect the plurality of receiving lines respectively to the plurality of receiving circuits, and simultaneously receive the touch signals through all of the plurality of first receiving circuits respectively connected to the plurality of receiving lines;

in the second mode, receive the touch signals by connecting first ones of the plurality of receiving lines that are disposed in one of the plurality of receiving groups, to any first one of the plurality of receiving circuits in the one of the plurality of receiving groups; and

in the third mode, receive the touch signals by connecting second ones of the plurality of receiving lines that are sequentially disposed in the one of the plurality of receiving groups, to any second one of the plurality of receiving circuits in the one of the plurality of receiving groups, and connecting third ones of the plurality of receiving lines that are sequentially disposed in the plurality of receiving groups, to another one of the plurality of receiving circuits in the one of the plurality of receiving groups.

22. The touch sensor of claim 12 , wherein the first mode is a fingerprint recognition mode,

wherein the second mode is a low resolution touch sensing mode, and

wherein the third mode is a high resolution touch sensing mode.

23. An electronic apparatus comprising:

a display panel; and

a touch sensor comprising:

a plurality of parallel transmitting lines extending in a first direction;

a plurality of parallel receiving lines extending in a second direction crossing the first direction;

a transmitting driver configured to:

in a first mode, apply first driving signals of a first voltage, to the plurality of transmitting lines; and

in a second mode, apply second driving signals of a second voltage, to the plurality of transmitting lines, the second voltage being different than the first voltage;

a plurality of receiving groups disposed in the first direction, and configured to receive touch signals, each of the plurality of receiving groups comprising adjacent ones of the plurality of receiving lines;

a plurality of first receiving circuits disposed to correspond to the plurality of receiving lines, respectively; and

a plurality of second receiving circuits,

wherein each of the plurality of second receiving circuits is disposed to correspond to a respective one of the plurality of receiving groups.