Fingerprint identification device, touch panel and display device

1. A fingerprint identification device, comprising a plurality of first driving lines extending in a first predetermined direction and a plurality of first sensing lines extending in a second predetermined direction that is not parallel to the first predetermined direction,

wherein the first sensing lines are divided into at least two sensing groups in the first predetermined direction, each sensing group comprises a plurality of sensing sub-groups arranged side by side in the second predetermined direction, each sensing sub-group comprises at least one of the first sensing lines, and the adjacent sensing sub-groups are insulated from each other,

wherein a grounding line is (i) arranged between adjacent sensing groups and/or between the adjacent sensing sub-groups of each sensing group and (ii) insulated from the first sensing line, and

wherein:

the grounding line comprises a first extension portion, a second extension portion, and a third extension portion,

the first extension portion extends in the first predetermined direction to a position between the adjacent sensing sub-groups of each sensing group,

the second extension portion is located between the two sensing groups adjacent to each other in the first predetermined direction, extends in the second predetermined direction, and intersects the first extension portion, and

the third extension portion is located between the two sensing groups adjacent to each other in the first predetermined direction, extends in the first predetermined direction, and intersects the second extension portion.

2. The fingerprint identification device according to claim 1 , wherein the first predetermined direction is perpendicular to the second predetermined direction.

3. The fingerprint identification device according to claim 1 , wherein each sensing sub-group comprises two of the first sensing lines forming a differential pair and configured to transmit signals in opposite directions.

4. The fingerprint identification device according to claim 1 , wherein the first driving lines are evenly arranged outside the adjacent two sensing groups in the first predetermined direction.

5. The fingerprint identification device according to claim 1 , further comprising a first driving integrated circuit (IC) and a first binding region configured to connect the fingerprint identification device to a first flexible circuit board, wherein the first driving lines are electrically connected to the first driving IC, the first driving IC is configured to apply a first driving signal to the first driving lines for the fingerprint identification, the first driving IC is electrically connected to the first binding region, and the first sensing line is electrically connected to the first flexible circuit board through the first binding region.

6. The fingerprint identification device according to claim 5 , further comprising a first sensing IC electrically connected to the first sensing lines and configured to process sensing signals acquired by the first sensing lines so as to acquire fingerprint data.

7. The fingerprint identification device according to claim 6 , wherein the first sensing IC is arranged on the first flexible circuit board.

8. The fingerprint identification device according to claim 6 , wherein the first sensing IC is integrated into the first driving IC.

9. The fingerprint identification device according to claim 1 , wherein the first sensing line is of a width greater than that of the first driving line.

10. The fingerprint identification device according to claim 9 , wherein the first driving line is of a width in the range of 20 μm to 30 μm, the first sensing line is of a width in the range of 30 μm to 35 μm, and the first driving line is spaced apart from the adjacent first sensing line in the first predetermined direction at a distance in the range of 25 μm to 50 μm.

11. A touch panel, comprising the fingerprint identification device according to claim 1 .

12. The touch panel according to claim 11 , wherein the fingerprint identification device comprises a first substrate, on which first driving lines and first sensing lines are arranged, wherein the first substrate is a portion of a substrate of the touch panel, or the first substrate is arranged on, and electrically connected to, the substrate of the touch panel.

13. The touch panel according to claim 12 , wherein:

the fingerprint identification device further comprises a first driving integrated circuit (IC) and a first binding region configured to connect the fingerprint identification device to a first flexible circuit board, wherein the first driving lines are electrically connected to the first driving IC, the first driving IC is configured to apply a first driving signal to the first driving lines for the fingerprint identification, the first driving IC is electrically connected to the first binding region, and the first sensing line is electrically connected to the first flexible circuit board through the first binding region; and

the touch panel comprises a second driving IC, a second binding region connected to a second flexible circuit board, a plurality of second driving lines and a plurality of second sensing lines, wherein the second driving lines are electrically connected to the second driving IC, the second driving IC is configured to apply a second driving signal to the second driving lines for the touch detection, the second driving IC is electrically connected to the second binding region, and the second sensing lines are electrically connected to the second flexible circuit board through the second binding region.

14. The touch panel according to claim 13 , wherein the first driving IC is arranged independently of the second driving IC and the first binding region is arranged independently of the second binding region, or the first driving IC is integrated into the second driving IC and the first binding region is integrated into the second binding region.

15. A display device, comprising the touch panel according to claim 11 .

16. The touch panel according to claim 11 , wherein each sensing sub-group comprises two of the first sensing lines forming a differential pair and configured to transmit signals in opposite directions.

17. A fingerprint identification device, comprising:

a plurality of first driving lines extending in a first predetermined direction;

a plurality of first sensing lines extending in a second predetermined direction that is not parallel to the first predetermined direction; and

a first driving integrated circuit (IC) and a first binding region configured to connect the fingerprint identification device to a first flexible circuit board,

wherein the first sensing lines are divided into at least two sensing groups in the first predetermined direction, each sensing group comprises a plurality of sensing sub-groups arranged side by side in the second predetermined direction, each sensing sub-group comprises at least one of the first sensing lines, and the adjacent sensing sub-groups are insulated from each other, and

wherein the first driving lines are electrically connected to the first driving IC, the first driving IC is configured to apply a first driving signal to the first driving lines for the fingerprint identification, the first driving IC is electrically connected to the first binding region, and the first sensing line is electrically connected to the first flexible circuit board through the first binding region.

18. The fingerprint identification device according to claim 17 , wherein a grounding line is arranged between the adjacent sensing groups and/or between the adjacent sensing sub-groups of each sensing group, and insulated from the first sensing line.

19. The fingerprint identification device according to claim 18 , wherein the grounding line comprises a first extension portion, a second extension portion and a third extension portion; wherein

the first extension portion extends in the first predetermined direction to a position between the adjacent sensing sub-groups of each sensing group;

the second extension portion is located between the two sensing groups adjacent to each other in the first predetermined direction, extends in the second predetermined direction, and intersects the first extension portion; and

the third extension portion is located between the two sensing groups adjacent to each other in the first predetermined direction, extends in the first predetermined direction, and intersects the second extension portion.

20. A fingerprint identification device, comprising a plurality of first driving lines extending in a first predetermined direction and a plurality of first sensing lines extending in a second predetermined direction that is not parallel to the first predetermined direction, wherein the first sensing lines are divided into at least two sensing groups in the first predetermined direction, each sensing group comprises a plurality of sensing sub-groups arranged side by side in the second predetermined direction, each sensing sub-group comprises at least one of the first sensing lines, and the adjacent sensing sub-groups are insulated from each other,

wherein the first sensing line is of a width greater than that of the first driving line, and

wherein the first driving line is of a width in the range of 20 μm to 30 μm, the first sensing line is of a width in the range of 30 μm to 35 μm, and the first driving line is spaced apart from the adjacent first sensing line in the first predetermined direction at a distance in the range of 25 μm to 50 μm.