Touch display device having a capacitive touch electrode and electromagnetic touch coil
View Patent ↗The present invention provides a touch display module and a touch display device; by integrating an electromagnetic touch electrode in the touch display module and placing the electromagnetic touch electrode and a capacitive touch electrode in different layers, the touch display module is compatible with capacitive touch and electromagnetic touch, and at a same time, the electromagnetic touch and capacitive touch may not interfere with each other, and compared with back mounted electromagnetic induction modules in the prior art, a thickness of the touch display module can be reduced, and power consumption and manufacturing cost will not be increased.
1. A touch display module, comprising a touch layer and a flexible substrate being disposed in different layers; wherein
the touch layer comprises a capacitive touch electrode, and the capacitive touch electrode is configured to determine a plane coordinate of a finger or a capacitive pen; and
the flexible substrate comprises an electromagnetic touch coil, and the electromagnetic touch coil is configured to determine a plane coordinate of an electromagnetic pen; wherein the electromagnetic touch coil comprises a first electromagnetic touch coil extending along a first direction and forming a loop and a second electromagnetic touch coil extending along a second direction and forming a loop;
wherein the flexible substrate comprises a first flexible substrate layer and a second flexible substrate layer disposed in different layers; and
the first electromagnetic touch coil and the second electromagnetic touch coil are disposed in the first flexible substrate layer and the second flexible substrate layer, respectively; or, the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the first flexible substrate layer or the second flexible substrate layer.
2. The touch display module according to claim 1 , wherein the capacitive touch electrode comprises a first capacitive touch electrode extending along a first direction and a second capacitive touch electrode extending along a second direction, and the first direction and the second direction are perpendicular to each other; wherein one of the first capacitive touch electrode and the second capacitive touch electrode is a transmitting electrode, and another one is a receiving electrode.
3. The touch display module according to claim 1 , wherein the first direction and the second direction are perpendicular to each other; wherein one of the first electromagnetic touch coil and the second electromagnetic touch coil is a transmitting coil, and another one is a receiving coil.
4. The touch display module according to claim 1 , wherein the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the first flexible substrate layer, and a metal bridge used for insulating at an intersection of the first electromagnetic touch coil and the second electromagnetic touch coil is disposed in the second flexible substrate layer; or, the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the second flexible substrate layer, and the metal bridge used for insulating at the intersection of the first electromagnetic touch coil and the second electromagnetic touch coil is disposed in the first flexible substrate layer.
5. The touch display module according to claim 4 , wherein when the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the first flexible substrate layer or the second flexible substrate layer, the first electromagnetic touch coil and the second electromagnetic touch coil are prepared by a same mask, and the metal bridge is prepared by another mask.
6. The touch display module according to claim 1 , wherein the flexible substrate further comprises a bottom shielding metal layer disposed in a layer different from the first flexible substrate layer and the second flexible substrate layer;
the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the first flexible substrate layer or the second flexible substrate layer, and a metal bridge used for insulating at an intersection of the first electromagnetic touch coil and the second electromagnetic touch coil is disposed in the bottom shielding metal layer.
7. The touch display module according to claim 1 , wherein when the first electromagnetic touch coil and the second electromagnetic touch coil are disposed in the first flexible substrate layer and the second flexible substrate layer, respectively, the first electromagnetic touch coil and the second electromagnetic touch coil are prepared by two different masks.
8. The touch display module according to claim 1 , wherein materials of the capacitive touch electrode and the electromagnetic touch coil are both indium tin oxide.
9. The touch display module according to claim 1 , wherein the first electromagnetic touch coil comprises two first electromagnetic touch electrodes disposed along the first direction and a first electromagnetic connection electrode disposed along the second direction used for connecting the two first electromagnetic touch electrodes; and
the second electromagnetic touch coil comprises two second electromagnetic touch electrodes disposed along the second direction and a second electromagnetic connection electrode disposed along the first direction used for connecting the two second electromagnetic touch electrodes.
10. The touch display module according to claim 1 , wherein the flexible substrate further comprises:
a first spacer layer disposed between the first flexible substrate layer and the second flexible substrate layer;
a photoresist layer disposed at a side of the second flexible substrate layer away from the first spacer layer;
a bottom shielding metal layer disposed at a side of the photoresist layer away from the second flexible substrate layer, wherein a metal bridge used for insulating at an intersection of the first electromagnetic touch coil and the second electromagnetic touch coil is disposed in the bottom shielding metal layer; and
a second spacer layer disposed at a side of the bottom shielding metal layer away from the photoresist layer.
11. A touch display device, comprising a touch display module, and the touch display module comprising a touch layer and a flexible substrate being disposed in different layers; wherein
the touch layer comprises a capacitive touch electrode, and the capacitive touch electrode is configured to determine a plane coordinate of a finger or a capacitive pen; and
the flexible substrate comprises an electromagnetic touch coil, and the electromagnetic touch coil is configured to determine a plane coordinate of an electromagnetic pen; wherein the electromagnetic touch coil comprises a first electromagnetic touch coil extending along a first direction and forming a loop and a second electromagnetic touch coil extending along a second direction and forming a loop;
wherein the flexible substrate comprises a first flexible substrate layer and a second flexible substrate layer disposed in different layers; and
the first electromagnetic touch coil and the second electromagnetic touch coil are disposed in the first flexible substrate layer and the second flexible substrate layer, respectively; or, the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the first flexible substrate layer or the second flexible substrate layer.
12. The touch display device according to claim 11 , wherein the capacitive touch electrode comprises a first capacitive touch electrode extending along a first direction and a second capacitive touch electrode extending along a second direction, and the first direction and the second direction are perpendicular to each other; wherein one of the first capacitive touch electrode and the second capacitive touch electrode is a transmitting electrode, and another one is a receiving electrode.
13. The touch display device according to claim 11 , wherein the first direction and the second direction are perpendicular to each other; wherein one of the first electromagnetic touch coil and the second electromagnetic touch coil is a transmitting coil, and another one is a receiving coil.
14. The touch display device according to claim 11 , wherein the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the first flexible substrate layer, and a metal bridge used for insulating at an intersection of the first electromagnetic touch coil and the second electromagnetic touch coil is disposed in the second flexible substrate layer; or, the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the second flexible substrate layer, and the metal bridge used for insulating at the intersection of the first electromagnetic touch coil and the second electromagnetic touch coil is disposed in the first flexible substrate layer.
15. The touch display device according to claim 14 , wherein when the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the first flexible substrate layer or the second flexible substrate layer, the first electromagnetic touch coil and the second electromagnetic touch coil are prepared by a same mask, and the metal bridge is prepared by another mask.
16. The touch display device according to claim 11 , wherein the flexible substrate further comprises a bottom shielding metal layer disposed in a layer different from the first flexible substrate layer and the second flexible substrate layer;
the first electromagnetic touch coil and the second electromagnetic touch coil are both disposed in the first flexible substrate layer or the second flexible substrate layer, and a metal bridge used for insulating at an intersection of the first electromagnetic touch coil and the second electromagnetic touch coil is disposed in the bottom shielding metal layer.
17. The touch display device according to claim 11 , wherein when the first electromagnetic touch coil and the second electromagnetic touch coil are disposed in the first flexible substrate layer and the second flexible substrate layer, respectively, the first electromagnetic touch coil and the second electromagnetic touch coil are prepared by two different masks.
18. The touch display device according to claim 11 , wherein materials of the capacitive touch electrode and the electromagnetic touch coil are both indium tin oxide.
19. The touch display device according to claim 11 , wherein the first electromagnetic touch coil comprises two first electromagnetic touch electrodes disposed along the first direction and a first electromagnetic connection electrode disposed along the second direction used for connecting the two first electromagnetic touch electrodes; and
the second electromagnetic touch coil comprises two second electromagnetic touch electrodes disposed along the second direction and a second electromagnetic connection electrode disposed along the first direction used for connecting the two second electromagnetic touch electrodes.
20. The touch display device according to claim 11 , wherein the flexible substrate further comprises:
a first spacer layer disposed between the first flexible substrate layer and the second flexible substrate layer;
a photoresist layer disposed at a side of the second flexible substrate layer away from the first spacer layer;
a bottom shielding metal layer disposed at a side of the photoresist layer away from the second flexible substrate layer, wherein a metal bridge used for insulating at an intersection of the first electromagnetic touch coil and the second electromagnetic touch coil is disposed in the bottom shielding metal layer; and
a second spacer layer disposed at a side of the bottom shielding metal layer away from the photoresist layer.