Touch structure and method for manufacturing the same, touch substrate, display substrate

Patent metadata

Field	Value
Publication number	US-11340737-B2
Application number	US-201816336387-A
Country	US
Kind code	B2
Filing date	Nov 21, 2018
Priority date	Jan 2, 2018
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

The present disclosure provides a touch structure and a method for manufacturing the touch structure, a touch substrate and a display substrate. The touch structure includes: a touch electrode; a first signal line and an auxiliary conductive structure provided at a side of the touch electrode, the auxiliary conductive structure has a conductivity greater than that of the touch electrode; and a first insulation layer provided between the auxiliary conductive structure and the first signal line, the auxiliary conductive structure is coupled to the touch electrode at multiple coupling positions and is coupled to the first signal line through a first via-hole penetrating through the first insulation layer.

First claim

The invention claimed is:

1. A touch structure, comprising:
a touch electrode;
a first signal line and an auxiliary conductive structure provided at a side of the touch electrode, the auxiliary conductive structure has a conductivity greater than that of the touch electrode; and
a first insulation layer provided between the auxiliary conductive structure and the first signal line, the auxiliary conductive structure is coupled to the touch electrode at multiple coupling positions and is coupled to the first signal line through a first via-hole penetrating through the first insulation layer,
wherein a layer where the auxiliary conductive structure is located is between a layer where the first signal line is located and a layer where the touch electrode is located, and
wherein a second insulation layer is provided between the auxiliary conductive structure and the touch electrode, the auxiliary conductive structure is coupled to the touch electrode at multiple coupling positions through multiple second via-holes penetrating through the second insulation layer.

2. The touch structure of claim 1 , wherein the auxiliary conductive structure is coupled to the first signal line at multiple coupling positions through multiple first via-holes penetrating through the first insulation layer respectively.

3. The touch structure of claim 1 , wherein an orthographic projection of at least one of the multiple coupling positions between the auxiliary conductive structure and the touch electrode on the touch electrode does not overlap an orthographic projection of the first signal line on the touch electrode.

4. The touch structure of claim 1 , further comprising:
a second signal line provided in a same layer as the first signal line, the first signal line and the second signal line are provided in parallel, and the second signal line is not coupled to the touch electrode, an orthographic projection of at least one of the multiple coupling positions between the auxiliary conductive structure and the touch electrode on the touch electrode is at a side of an orthographic projection of the second signal line on the touch electrode away from an orthographic projection of the first signal line on the touch electrode.

5. The touch structure of claim 1 , wherein the auxiliary conductive structure is of a net-like structure.

6. The touch structure of claim 2 wherein the auxiliary conductive structure directly contacts the touch electrode.

7. A touch substrate, comprising:
a base substrate;
a plurality of touch structures provided at intervals on the base substrate, the touch structures are arranged in an array, and at least one of the touch structures is the touch structure of claim 1 .

8. A display substrate, comprising pixel elements provided at intervals and touch structures provided at intervals, at least one of the touch structures covers multiple adjacent pixel elements, at least one of the touch structures is the touch structure of claim 1 , and the first signal line and the auxiliary conductive structure of the at least one of the touch structures are provided in an interval between adjacent pixel elements.

9. The display substrate of claim 8 , further comprising a gate line and a data line, the auxiliary conductive structure and the gate line are provided in different layers, the auxiliary conductive structure and the data line are provided in different layers, at least one insulation layer is provided between the auxiliary conductive structure and the gate line, and at least one insulation layer is provided between the auxiliary conductive structure and the data line.

10. The display substrate of claim 9 , wherein the first signal line and the data line are provided in a same layer and in parallel, and
the auxiliary conductive structure comprises a first part parallel to the gate line and a second part parallel to the data line, an orthographic projection of the first part of the auxiliary conductive structure on the touch electrode overlaps an orthographic projection of the gate line on the touch electrode, and orthographic projection of the second part of the auxiliary conductive structure on the touch electrode overlaps an orthographic projection of the first signal line on the touch electrode.

11. The display substrate of claim 8 , wherein the touch electrode is multiplexed as a common electrode.

12. A touch structure, comprising:
a touch electrode;
a first signal line and an auxiliary conductive structure provided at a side of the touch electrode, the auxiliary conductive structure has a conductivity greater than that of the touch electrode; and
a first insulation layer provided between the auxiliary conductive structure and the first signal line, the auxiliary conductive structure is coupled to the touch electrode at multiple coupling positions and is coupled to the first signal line through a first via-hole penetrating through the first insulation layer,
wherein a layer where the first signal line is located is between a layer where the auxiliary conductive structure is located and a layer where the touch electrode is located, a third insulation layer is provided between the first signal line and the touch electrode, the auxiliary conductive structure is coupled to the touch electrode at multiple coupling positions through multiple third via-holes penetrating through the first insulation layer and the third insulation layer, and a position of the first signal line does not overlap positions of the third via-holes.

13. A method for manufacturing a touch structure, comprising:
forming a first signal line and an auxiliary conductive structure on a base substrate, a first insulation layer is formed between the auxiliary conductive structure and the first signal line; and
forming a touch electrode on the base substrate formed with the first signal line and the auxiliary conductive structure, the auxiliary conductive structure has a conductivity greater than that of the touch electrode, the auxiliary conductive structure is formed to be coupled to the touch electrode at multiple coupling positions, and coupled to the first signal line through a first via-hole formed in the first insulation layer,
wherein the method further comprises:
forming a second signal line in a same layer as the first signal line, the first signal line and the second signal line are in parallel, and the second signal line is not coupled to the touch electrode, the auxiliary conductive structure and the touch electrode are formed so that an orthographic projection of at least one of the multiple coupling positions between the auxiliary conductive structure and the touch electrode on the touch electrode is at a side of an orthographic projection of the second signal line on the touch electrode away from an orthographic projection of the first signal line on the touch electrode.

14. The method of claim 13 , wherein forming the first signal line and the auxiliary conductive structure on the base substrate comprises:
forming the first signal line on the base substrate;
forming the first insulation layer above the first signal line; and
forming the auxiliary conductive layer on the first insulation layer.

15. The method of claim 14 , wherein forming the touch electrode on the base substrate formed with the first signal line and the auxiliary conductive structure comprises:
forming the touch electrode directly on the auxiliary conductive structure so that the auxiliary conductive structure directly contacts the touch electrode.

16. The method of claim 14 , wherein forming the touch electrode on the base substrate formed with t

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Hu Weipin
• Wei Congcong
• Wang Chun
• Jiang Mingxiao
• Sun Xiao

Classifications

• H10D86/481

  integrated with passive devices, e.g. auxiliary capacitors · CPC title

• H10D86/60

  wherein the TFTs are in active matrices · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G02F1/1343

  Electrodes {(reflective electrodes G02F1/133553)} · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title