Touch display panel, touching display device having reduced signal interferences and driving method thereof

• US 10,310,646 B2
• Filed: 01/14/2016
• Issued: 06/04/2019
• Est. Priority Date: 08/10/2015
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Chen, Huabin, Wang, Ruirui, Feng, Bin, Yuan, Jianfeng
• Primary Examiner(s): Snyder, Adam J
• Application Number:
  US15/105,551
• Publication Number:
  US 20170205920A1
• Time in Patent Office: 1,237 Days
• Field of Search: 345173, 178 1801
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

This disclosure discloses a touch display panel, a driving method thereof and a touch display device. The touch display panel comprises a first substrate and a second substrate aligned with each other; a first signal transmission line and a second signal transmission line arranged on the first substrate, the second signal transmission line intersecting with the first signal transmission line; gate lines and data lines arranged on the second substrate, the second substrate being further provided with a first signal output end and a second signal output end led out from the gate lines and arranged alternately; and a first spacer corresponding to the first signal transmission line and a second spacer corresponding to the second signal transmission line.

Claims

1. A touch display panel comprising a first substrate and a second substrate aligned with each other, wherein the touch display panel further comprises:

a first signal transmission line and a second signal transmission line arranged on the first substrate, the second signal transmission line intersecting with the first signal transmission line;

gate lines and data lines arranged on the second substrate, the second substrate being further provided with a first signal output end and a second signal output end arranged alternately, the first signal output end and the second signal output end being electrically connected with the gate lines; and

a first spacer corresponding to the first signal transmission line and a second spacer corresponding to the second signal transmission line, the first spacer being used for achieving electrical connection between the first signal transmission line and the first signal output end when a corresponding touch region is in a touch state, and the second spacer being used for achieving electrical connection between the second signal transmission line and the second signal output end when the corresponding touch region is in a touch state,

wherein a first insulating layer is further provided on the first signal transmission line and the second signal transmission line, and via holes penetrating the first insulating layer and corresponding to the first signal transmission line and the second signal transmission line respectively are filled with an electrically conductive material, to achieve electrical connections between the first spacer and the first signal transmission line, as well as between the second spacer and the second signal transmission line respectively.

2. The touch display panel according to claim 1, further comprising a second insulating layer formed on the second substrate comprising the gate lines and the data lines, wherein

via holes penetrating the second insulating layer are filled with an electrically conductive material, such that the electrically conductive material extends to a position corresponding to the first spacer and is exposed to an uppermost layer of the second substrate so as to obtain the first signal output end;

and

via holes penetrating the second insulating layer are filled with an electrically conductive material, such that the electrically conductive material extends to a position corresponding to the second spacer and is exposed to an uppermost layer of the second substrate so as to obtain the second signal output end.

3. The touch display panel according to claim 2, wherein the second insulating layer comprises a gate insulating layer sandwiched between the gate line layer and the data line layer, as well as a passivation layer positioned over the data line layer.

4. The touch display panel according to claim 3, wherein the second signal output end is further connected in series with a thin film transistor switch.

5. The touch display panel according to claim 4, wherein the thin film transistor switch comprises a gate, a gate insulating layer and an active layer sequentially arranged in the same layer as the gate lines, as well as a source and a drain arranged in the same layer as the data lines, wherein

via holes penetrating the gate insulating layer and the passivation layer as well as via holes penetrating the passivation layer are both filled with an electrically conductive material, such that the source is electrically connected with the gate lines, and

via holes penetrating the passivation layer are filled with an electrically conductive material, such that the drain is electrically connected with the electrically conductive material exposed to the uppermost layer of the second substrate.

6. The touch display panel according to claim 2, wherein the first spacer and the second spacer are both arranged on the first substrate, wherein

a bottom of the first spacer is electrically connected with a side of the first signal transmission line close to the second substrate, wherein when the corresponding touch region is in a non-touch state, a top of the first spacer is spaced from the first signal output end on the second substrate at a certain distance, and when the corresponding touch region is in a touch state, the top of the first spacer is in contact with the first signal output end on the second substrate;

and

a bottom of the second spacer is electrically connected with a side of the second signal transmission line close to the second substrate, wherein when the corresponding touch region is in a non-touch state, a top of the second spacer is spaced from the second signal output end on the second substrate at a certain distance, and when the corresponding touch region is in a touch state, the top of the second spacer is in contact with the second signal output end on the second substrate.

7. The touch display panel according to claim 6, wherein by coating surfaces of corresponding spacers and surfaces of corresponding signal transmission lines with an electrically conductive material and forming electrically conductive paths therebetween, electrical connections between the first spacer and the first signal transmission line, as well as between the second spacer and the second signal transmission line are achieved respectively.

8. The touch display panel according to claim 1, wherein the first substrate is a color filter substrate, and the second substrate is an array substrate.

9. The touch display panel according to claim 2, wherein the first spacer and the second spacer are both arranged on the second substrate, wherein

a bottom of the first spacer is electrically connected with the first signal output end on the second substrate, wherein when the corresponding touch region is in a non-touch state, a top of the first spacer is spaced from the first signal transmission line on the first substrate at a certain distance, and when the corresponding touch region is in a touch state, the top of the first spacer is in contact with the first signal transmission line on the first substrate;

and

a bottom of the second spacer is electrically connected with the second signal output end on the second substrate, wherein when the corresponding touch region is in a non-touch state, a top of the second spacer is spaced from the second signal transmission line on the first substrate at a certain distance, and when the corresponding touch region is in a touch state, the top of the second spacer is in contact with the second signal transmission line on the first substrate.

10. The touch display panel according to claim 9, wherein by coating surfaces of corresponding spacers and surfaces of corresponding signal output ends with an electrically conductive material and forming electrically conductive paths therebetween, electrical connections between the first spacer and the first signal output end, as well as between the second spacer and the second signal output end are achieved respectively.

11. The touch display panel according to claim 9, wherein when the corresponding touch region is in a touch state, contacts of the first spacer and the second spacer with an opposite substrate are achieved respectively by means of deformation of the first substrate.

12. The touch display panel according to claim 1, wherein the first signal transmission line is an array of sensors for determining transversal coordinates in the corresponding touch region, and the second signal transmission line is an array of sensors for determining longitudinal coordinates in the corresponding touch region.

13. The touch display panel according to claim 1, wherein an insulating shield layer between the first signal transmission line and the second signal transmission line is provided at an intersection of the first signal transmission line and the second signal transmission line.

14. The touch display panel according to claim 1, wherein the first signal transmission line is formed by a metal wire, and the second signal transmission line is formed by a metal wire and an electrically conductive bridging structure.

15. The touch display panel according to claim 6, wherein when the corresponding touch region is in a touch state, contacts of the first spacer and the second spacer with an opposite substrate are achieved respectively by means of deformation of the first substrate.

16. The touch display panel according to claim 1, wherein the first spacer and the second spacer are spherical or columnar.

17. The touch display panel according to claim 1, wherein the first substrate further comprises a black matrix layer, the first signal transmission line and the second signal transmission line being arranged on a side of the black matrix layer close to the second substrate.

18. The touch display panel according to claim 1, wherein the first signal transmission line on the first substrate extends in the same direction as the gate lines on the second substrate, and the second signal transmission line on the first substrate extends in the same direction as the data lines on the second substrate.

19. The touch display panel according to claim 1, further comprising a primary spacer positioned between the first substrate and the second substrate for maintaining a general cell thickness of the touch display panel, wherein the primary spacer is in physical contact with the first substrate and the second substrate.

20. A touch display device, comprising the touch display panel according to claim 1.

21. A method for driving the touch display panel according to claim 1, comprising:

applying a scanning signal to the gate lines on the second substrate; and

detecting output signals at the first signal transmission line and the second signal transmission line on the first substrate respectively, wherein,

if the corresponding touch region is in a touch state, an intersection position of the first signal transmission line and the second signal transmission line where corresponding output signals are detected simultaneously is determined as a touch position.