TOUCH DISPLAY PANEL AND DISPLAY DEVICE

• US 20160098113A1
• Filed: 08/16/2014
• Published: 04/07/2016
• Est. Priority Date: 04/18/2014
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: DING, Xiaoliang, WANG, Haisheng, LIU, Yingming, REN, Tao
• Granted Patent: US 9,823,789 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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 3/0443 using a single layer of sensing electrodes

Abstract

A touch panel and a display device are disclosed. The touch panel comprises: a plurality of self-capacitance electrodes (04) disposed in a same layer and independent from each other; a plurality of wires (05) connecting the self-capacitance electrodes (04) to a margin frame of the touch panel; and periphery wirings (07) located at the margin frame of the touch panel and connected with the wires (05) one to one. Each of the wires (05) is electrically connected with at least two self-capacitance electrodes that are provided non-adjacent to each other (04) and self-capacitance electrodes (04) electrically connected with different wires (05) do not overlap each other. The touch panel can reduce touch dead zone in the touch panel utilizing self-capacitance principle.

Claims

1. A touch panel comprising:

a plurality of self-capacitance electrodes disposed in a same layer and independent from each other;

a plurality of wires connecting the self-capacitance electrodes to a margin frame of the touch panel, wherein each of the wires is electrically connected with at least two self-capacitance electrodes that are provided non-adjacent to each other and self-capacitance electrodes electrically connected with different wires do not overlap with each other; and

periphery wirings located at the margin frame of the touch panel and connected with the wires in a one-to-one manner.

2. The touch panel of claim 1, further comprising:

a touch sensing chip electrically connected with the periphery wirings via connection terminals.

3. The touch panel of claim 1, further comprising:

a top substrate and a bottom substrate disposed oppositely to each other;

wherein the self-capacitance electrodes are disposed on a side of the top substrate facing the bottom substrate or on a side of the bottom substrate facing the top substrate.

4. The touch panel of claim 3, further comprising:

a black matrix layer disposed on a side of the top substrate facing the bottom substrate or on a side of the bottom substrate facing the top substrate;

wherein orthogonal projections of patterns of the self-capacitance electrodes and patterns of the wires on the bottom substrate are within a region corresponding to a pattern of the black matrix layer.

5. The touch panel of claim 4, wherein orthogonal projections of patterns of the self-capacitance electrodes on the bottom substrate are of a mesh structure within a region corresponding to the pattern of the black matrix layer.

6. The touch panel of claim 1, wherein each of the wires is electrically connected with two self-capacitance electrodes that are disposed not adjacent to each other, and each of the wires is disposed in a same layer as the self-capacitance electrodes.

7. The touch panel of claim 1, wherein the margin frame of the touch panel is of a rectangle shape, and extension directions of the wires are consistent with a direction of a short side of the margin frame.

8. The touch panel of claim 1, wherein the margin frame of the touch panel has four sides, and each of the self-capacitance electrodes are connected to a closest side via a corresponding one of the wires while the wires do not intersect each other.

9. The touch panel of claim 4, wherein the black matrix layer is located on a side of the top substrate facing the bottom substrate, and a color filter layer is disposed on the black matrix layer;

the self-capacitance electrodes and the wires are located between the black matrix layer and the color filter layer, or on the color filter layer.

10. The touch panel of claim 9, wherein a first planarization layer and a spacer layer over the first planarization layer are disposed in order on the black matrix layer and the color filter layer;

the self-capacitance electrodes and the wires are located between the first planarization layer and the spacer layer.

11. The touch panel of claim 1, wherein the wires and the self-capacitance electrodes are disposed on different layers, and the self-capacitance electrodes and corresponding wires are electrically connected through via holes.

12. The touch panel of claim 11, wherein the black matrix layer is located on a side of the top substrate facing the bottom substrate and a color filter layer is disposed on the black matrix layer;

the self-capacitance electrodes are located between the black matrix layer and the color filter layer;

the wires are located on the color filter layer and are electrically connected with corresponding self-capacitance electrodes through via holes in the color filter layer.

13. The touch panel of claim 9, wherein a second planarization layer is disposed between the black matrix layer and the color filter layer, the second planarization layer has through holes or grooves at least in regions corresponding to patterns of the self-capacitance electrodes, and patterns of the self-capacitance electrodes fill in the through holes or grooves.

14. The touch panel of claim 13, wherein the through holes or grooves are of a trapezoid shape.

15. The touch panel of claim 13, wherein a surface area of the self-capacitance electrodes filled in the through holes or grooves is greater than a basal area of the through holes or grooves.

16. The touch panel of claim 1, wherein opposite sides of adjacent two self-capacitance electrodes are both fold lines.

17. The touch panel of claim 16, wherein the opposite sides of adjacent two self-capacitance electrodes that are fold lines both have step-like structures that are consistent and matching each other;

and/or the opposite sides of adjacent two self-capacitance electrodes that are fold lines both have concave-convex structures that are consistent and matching each other.

18. A display device comprising the touch panel of claim 1.

19. The touch panel of claim 3, wherein opposite sides of adjacent two self-capacitance electrodes are both fold lines.

20. The touch panel of claim 19, wherein the opposite sides of adjacent two self-capacitance electrodes that are fold lines both have step-like structures that are consistent and matching each other;

and/or

the opposite sides of adjacent two self-capacitance electrodes that are fold lines both have concave-convex structures that are consistent and matching each other.