Touch panel, method for fabricating the same, and touch device

Patent metadata

Field	Value
Publication number	US-10705668-B2
Application number	US-201816103234-A
Country	US
Kind code	B2
Filing date	Aug 14, 2018
Priority date	Feb 28, 2018
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

Disclosed are a touch panel, a method for fabricating the same, and a touch device. The touch panel includes a display area and a non-display area; the display area includes first touch-electrodes extending in a first direction, and second touch-electrodes extending in a second direction, insulated from each other and arranged intersecting with each other on a substrate, first signal-lines connected with the first touch-electrodes, and second signal-lines connected with second touch-electrodes; the non-display area includes a driver circuit arranged at one end of extension direction of second touch-electrodes, and connected with first signal-lines and second signal-lines; each first touch-electrode includes first grid-shaped electrode bumps connected in sequence in the first direction; and there are overlapping areas between orthographic-projections of first signal-lines, and orthographic-projections of first touch-electrodes onto the substrate, and orthographic-projections of first signal-lines lie into orthographic-projections of first grid-shaped electrode bumps onto the substrate in the overlapping areas.

First claim

The invention claimed is:

1. A touch panel, comprising a display area and a non-display area, wherein the display area comprises:
a plurality of first touch electrodes extending in a first direction, and a plurality of second touch electrodes extending in a second direction, the first touch electrodes and the second touch electrodes are insulated from each other and arranged intersecting with each other on a substrate;
first signal lines connected with the first touch electrodes, and second signal lines connected with the second touch electrodes;
the non-display area comprises a driver circuit arranged at one end of an extension direction of the second touch electrodes, and connected with the first signal lines and the second signal lines;
each first touch electrode comprises a plurality of first grid-shaped electrode bumps connected in sequence in the first direction; and there are overlapping areas between orthographic projections of the first signal lines onto the substrate and orthographic projections of the first touch electrodes onto the substrate, and the orthographic projections of the first signal lines onto the substrate lie into orthographic projections of the first grid-shaped electrode bumps onto the substrate in the overlapping areas;
wherein the orthographic projections of the first signal lines onto the substrate do not overlap with orthographic projections of the second touch electrodes onto the substrate.

2. The touch panel according to claim 1 , wherein each of the second touch electrodes comprises a plurality of second grid-shaped electrode bumps connected in sequence in the second direction.

3. The touch panel according to claim 2 , wherein both the first grid-shaped electrode bumps and the second grid-shaped electrode bumps are diamond-shaped electrode bumps.

4. The touch panel according to claim 2 , wherein the first grid-shaped electrode bumps are diamond-shaped electrode bumps, and each of the second grid-shaped electrode bumps is an electrode bump in a shape of a diamond with a pair of corners in the first direction being arc-rounded corners.

5. The touch panel according to claim 1 , wherein at most two of the first signal lines are arranged between two adjacent second touch electrodes.

6. The touch panel according to claim 1 , wherein the first signal lines are grid-shaped signal lines.

7. The touch panel according to claim 6 , wherein a size of grids of the grid-shaped signal lines is same as a size of grids of the grid-shaped electrode bumps in the first touch electrodes.

8. The touch panel according to claim 6 , wherein a width of a grid contour of the grid-shaped signal lines ranges from 3 to 5 micrometers.

9. The touch panel according to claim 1 , wherein an insulation layer with through-holes is arranged between the first signal lines and the first touch electrodes, and the first signal lines are connected with the first touch electrodes through the through-holes.

10. The touch panel according to claim 9 , wherein orthographic projections of the through-holes onto the substrate lie into the orthographic projections of the first grid-shaped electrode bumps onto the substrate.

11. The touch panel according to claim 9 , wherein the first signal lines are arranged on sides of the first touch electrodes away from a finger.

12. The touch panel according to claim 1 , wherein the second touch electrodes are bridged and connected above the first touch electrodes through bridge leads, and insulated from the first touch electrodes by an insulation layer, in areas where the first touch electrodes overlap with the second touch electrodes.

13. The touch panel according to claim 12 , wherein an insulation layer is arranged between the first signal lines and the first touch electrodes; and the insulation layer between the first touch electrodes and the second touch electrodes is arranged at a same layer as a layer on which the insulation layer between the first touch electrodes and the first signal lines is arranged, and the first signal lines are arranged at a same layer as a layer on which the bridge leads are arranged, in the areas where the first touch electrodes overlap with the second touch electrodes.

14. The touch panel according to claim 1 , wherein both the first signal lines and the second signal lines extend in the second direction, and the second touch electrodes are connected with the driver chip through the second signal lines connected with a terminal of the second signal lines.

15. A method for fabricating the touch panel according to claim 1 , comprising following steps:
forming a pattern of the plurality of first touch electrodes extending in the first direction, and a pattern of the plurality of second touch electrodes extending in the second direction, the first touch electrodes and the second touch electrodes are insulated from each other and arranged intersecting with each other on the substrate;
forming a pattern of the second signal lines connected with and arranged at a same layer as a layer on which the second touch electrodes are arranged;
forming a pattern of the first signal lines connected with the first touch electrodes; and
forming the driver circuit connected with the pattern of the second signal lines at one end of an extension direction of the second touch electrodes;
wherein the first signal lines and the second signal lines are arranged in the display area of the touch panel, each of the first touch electrodes comprises the plurality of first grid-shaped electrode bumps connected in sequence in the first direction, there are the overlapping areas between the orthographic projections of the first signal lines onto the substrate, and the orthographic projections of the first touch electrodes onto the substrate, and the orthographic projections of the first signal lines onto the substrate lie into the orthographic projections of the first grid-shaped electrode bumps onto the substrate in the overlapping areas.

16. The method according to claim 15 , wherein the steps comprise:
forming the pattern of the second touch electrodes, and the pattern of the second signal lines connected with and arranged at a same layer as a layer on which the second touch electrodes are arranged, on the substrate;
forming the driver circuit connected with the pattern of the second signal lines at one end of the extension direction of the second touch electrodes;
forming a first insulation layer between the first touch electrodes and the second touch electrodes in an area where the first touch electrodes overlap with the second touch electrodes;
forming the pattern of the first touch electrodes on the first insulation layer;
forming a second insulation layer above the pattern of the first touch electrodes, and forming through-holes on the second insulation layer; and
forming the pattern of the first signal lines, wherein the pattern of the first signal lines is connected with the first touch electrodes through the through-holes.

17. The method according to claim 15 , wherein the second touch electrodes are bridged and connected above the first touch electrodes through bridge leads in areas where the first touch electrodes overlap with the second touch electrodes; and the steps comprise:
forming the pattern of the first touch electrodes, the pattern of the second touch electrodes other than the bridge leads, and the pattern of the second signal lines connected with and arranged at a same layer as a layer on which the second touch electrodes are arranged, on the substrate;
forming the driver circuit connected with the pattern of the second sig

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Wang

Classifications

• H10W72/50

  Bond wires · CPC title

• H10W70/698

  Semiconductor materials that are electrically insulating, e.g. undoped silicon · CPC title

• H10D64/00

  Electrodes of devices having potential barriers · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title