Touch panel and cover plate structure and sensing structure thereof

Patent metadata

Field	Value
Publication number	US-9958972-B2
Application number	US-201414902347-A
Country	US
Kind code	B2
Filing date	Jun 17, 2014
Priority date	Jul 2, 2013
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

The disclosure provides a sensing structure of a touch panel, which includes a shielding layer and a sensing layer. The shielding layer is provided with one hollow portion, and the sensing layer is arranged under the shielding layer and located around the hollow portion. The disclosure further provides a cover plate structure of a touch panel and the touch panel. In the touch panel, the cover plate structure of the touch panel and the sensing structure of a touch panel provided by the disclosure, the sensing layer is located under the shielding layer and around the hollow portion. Thus, the sensing layer is covered by the shielding layer and avoids the hollow portion of a pattern zone, so that the sensing layer cannot be seen through the hollow portion, and the appearance quality of the touch panel is improved.

First claim

What is claimed is:

1. A sensing structure of a touch panel, comprising:
a shielding layer having a hollow portion; and
a sensing layer arranged under the shielding layer and located around the hollow portion, wherein the sensing layer does not overlap with the hollow portion.

2. The sensing structure of a touch panel of claim 1 , wherein the shielding layer has a pattern zone composed of the hollow portion and a non hollow portion, and the hollow portion is located around the non hollow portion.

3. The sensing structure of a touch panel of claim 1 , wherein the shielding layer has a pattern zone composed of the hollow portion and a non hollow portion, and the non hollow portion is located around the hollow portion.

4. The sensing structure of a touch panel of claim 2 , wherein the sensing layer comprises at least one first electrode and at least one second electrode, the first electrode and the second electrode are alternately arranged and surround the pattern zone, and the first electrode and the second electrode are electrically insulated from one another.

5. The sensing structure of a touch panel of claim 4 , wherein the first electrode comprises a plurality of first circular arcs and a first connection portion connecting the first circular arcs, the second electrode comprises a plurality of second circular arcs and a second connection portion connecting the second circular arcs, the first circular arcs and the second circular arcs are alternately arranged, the second connection portion is located in a first opening zone formed by the first circular arcs, and the first connection portion is located in a second opening zone formed by the second circular arcs.

6. The sensing structure of a touch panel of claim 4 , wherein the first electrode comprises a first conductive portion and a second conductive portion arranged along a first direction opposite to each other, a first connection portion connected to the first conductive portion and a second connection portion connected to the second conductive portion, a first opening zone and a second opening zone are formed between the first conductive portion and the second conductive portion in a second direction, the second electrode comprises a third conductive portion and a fourth conductive portion arranged along the second direction opposite to each other, a third connection portion connected to the third conductive portion and a fourth connection portion connected to the fourth conductive portion, a third opening zone and a fourth opening zone are formed between the third conductive portion and the fourth conductive portion in the first direction, the first connection portion and the second connection portion are respectively located in the third opening zone and the fourth opening zone, the third connection portion and the fourth connection portion are respectively located in the first opening zone and the second opening zone, and the first conductive portion and the second conductive portion are alternately arranged with the third conductive portion and the fourth conductive portion respectively at two opposite sides of the pattern zone.

7. The sensing structure of a touch panel of claim 4 , wherein the first electrode comprises a plurality of first circular rings and a first connection portion connecting the first circular rings, the second electrode comprises a plurality of second circular rings and a second connection portion connecting the second circular rings, the first circular rings and the second circular rings are alternately arranged, a first insulation bump is disposed between the second circular rings and the first connection portion, and a second insulation bump is disposed between the first circular rings and the second connection portion.

8. The sensing structure of a touch panel of claim 1 , wherein the sensing layer comprises a first electrode and a second electrode, the first electrode comprises a first vertical pole portion and a plurality of first horizontal pole portions, the first horizontal pole portions are parallel to each other and electrically connected to each other through the first vertical pole portion, the second electrode comprises a second vertical pole portion and a plurality of second horizontal pole portions, the second horizontal pole portions are parallel to each other and electrically connected to each other through the second vertical pole portion, the first vertical pole portion and the second vertical pole portion are parallel to each other, the first horizontal pole portions and the second horizontal pole portions are parallel to each other, a plurality of gaps are formed between the first horizontal pole portions and the second horizontal pole portions, and the hollow portion is located in the gaps.

9. The sensing structure of a touch panel of claim 1 , wherein the shielding layer comprises a plurality of opaque insulation layers stacked with one another.

10. The sensing structure of a touch panel of claim 9 , wherein the shielding layer comprises a first insulation layer, a second insulation layer, a third insulation layer and a fourth insulation layer, and the first insulation layer, the second insulation layer, the third insulation layer and the fourth insulation layer are sequentially stacked along a direction toward the sensing layer.

11. The sensing structure of a touch panel of claim 10 , wherein side surfaces of the first insulation layer and the second insulation layer adjacent to one side of the hollow portion form a shape of a ladder.

12. The sensing structure of a touch panel of claim 10 , wherein the first insulation layer, the second insulation layer and the third insulation layer are formed form a white insulating printing ink, and the fourth insulation layer is formed from a black insulating printing ink.

13. The sensing structure of a touch panel of claim 1 , further comprising an insulation layer disposed between the sensing layer and the shielding layer.

14. The sensing structure of a touch panel of claim 13 , wherein a material of the insulation layer is a transparent insulating organic material or a transparent insulating inorganic material.

15. The sensing structure of a touch panel of claim 14 , wherein materials of the first electrode and the second electrode are opaque conductive materials.

16. A cover plate structure of a touch panel, comprising:
a cover plate; and
a sensing structure disposed on the cover plate, wherein the sensing structure comprises:
a shielding layer having a hollow portion; and
a sensing layer arranged under the shielding layer and located around the hollow portion, wherein the sensing layer does not overlap with the hollow portion, and the shielding layer is located between the cover plate and the sensing layer.

17. The cover plate structure of the touch panel of claim 16 , further comprising a conductive layer, wherein the shielding layer divides the cover plate into a visible area and a non-visible area, the shielding layer is located in the non-visible area, and the conductive layer is disposed on the cover plate in the visible area.

18. A touch panel, comprising:
a cover plate having a visible area and a non-visible area;
a substrate located under the cover plate;
a sensing structure disposed between the cover plate and the substrate in the non-visible area, wherein the sensing structure comprises:
a shielding layer having a hollow portion; and
a sensing layer arranged under the shielding layer and located around the hollow portion, wherein the sensing layer does not overlap with the hollow portion; and
a conduct

Assignees

• Tpk Touch Solutions Xiamen Inc

Inventors

• Chi Ho-Hsun
• Lai Bin
• Xu Xianbin
• Feng Fenghui

Classifications

• G06F2203/04107

  Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds · CPC title

• G06F3/044

  by capacitive means · CPC title

• H03K17/962

  Capacitive touch switches · CPC title

• H03K2217/960765

  Details of shielding arrangements · CPC title

• H03K2017/9602

  characterised by the type or shape of the sensing electrodes · CPC title