Touch element and touch display module

• US 9,798,406 B2
• Filed: 02/19/2016
• Issued: 10/24/2017
• Est. Priority Date: 09/08/2015
• Status: Active Grant

• Current Assignee: HannsTouch Solution, Inc.
• Original Assignee: HannsTouch Solution, Inc.
• Inventors: Lo, Wei-Jen, Huang, Hung-Yi
• Primary Examiner(s): Tzeng, Fred
• Application Number:
  US15/047,639
• Publication Number:
  US 20170068363A1
• Time in Patent Office: 613 Days
• Field of Search: 345174
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch sensing device including a substrate, a plurality of first sensing series separated from each other and a plurality of second sensing series separated from each other is provided. The substrate has a first surface and a second surface. The first sensing series are disposed on the first surface. Each of the first sensing series includes a plurality of first sensing pads connected to each other. The second sensing series are disposed on the first surface. Each of the second sensing series includes a plurality of second sensing pads distributed between the first sensing series and a plurality of connection lines connecting the second sensing pads. Each of the connection lines extends along an edge of one of the first sensing series, and each of the connection lines is electrically connected to the second sensing pads located at two opposite sides of the first sensing series.

Claims

1. A touch element, comprising:

a substrate, comprising a first surface and a second surface opposite to the first surface;

a plurality of first sensing series, separated from each other, wherein the first sensing series are arranged along a first direction and disposed on the first surface, each of the first sensing series comprises a plurality of first sensing pads connected to each other; and

a plurality of second sensing series, separated from each other, wherein the second sensing series are arranged along a second direction and disposed on the first surface, each of the second sensing series comprises a plurality of second sensing pads distributed between the first sensing series and a plurality of connection lines connecting the second sensing pads, wherein each of the connection lines extends along an edge of one of the first sensing series and each of the connection lines comprises a first conductive line and a second conductive line, each of the first conductive lines and the corresponding second conductive line respectively extend along a side and another side of the corresponding first sensing series, and each of the connection lines is electrically connected to the second sensing pads located at two opposite sides of the first sensing series, the first direction and the second direction intersect each other, and the first sensing series and the second sensing series are electrically insulated from each other.

2. The touch element as claimed in claim 1, wherein the first conductive line and the second conductive line of each of the connection lines are respectively symmetrically distributed with respect to the corresponding first sensing series.

3. The touch element as claimed in claim 2, wherein a pitch between the first conductive line of each of the connection lines and the corresponding first sensing series in the first direction is equal to a pitch between the second conductive line and the corresponding first sensing series in the first direction.

4. The touch element as claimed in claim 1, wherein the first sensing pads and the second sensing pads have the same shape and size.

5. The touch element as claimed in claim 1, wherein each of the first sensing series further comprises a plurality of bridging lines, and the bridging lines are connected to the first sensing pads.

6. The touch element as claimed in claim 1, wherein the first conductive line and the second conductive line of each of the connection lines are connected to each other at a position adjacent to a terminal of the corresponding first sensing series.

7. The touch element as claimed in claim 1, wherein the connection lines in the same second sensing series have the same length.

8. The touch element as claimed in claim 1, wherein materials of the first sensing pads and the second sensing pads comprise transparent conductive oxide, and a material of the connection line comprises metal.

9. The touch element as claimed in claim 1, wherein each of the first sensing series further comprises a first wiring, and each of the first wirings extends from the first sensing pad at a terminal of the corresponding first sensing series and is surrounded by the corresponding connection line.

10. The touch element as claimed in claim 9, wherein the substrate has a plurality of conductive through holes, the touch element further comprises a plurality of second wirings and a plurality of third wirings, the second wirings are located on the second surface, and the third wirings are located on the first surface,

a part of the conductive through holes are located at the terminals of the first sensing series, so as to connect the first wirings and the second wirings, and

another part of the conductive through holes are located at a side of the connection lines, so as to connect the second wirings and the third wirings.

11. The touch element as claimed in claim 10, wherein a width of each of the second wirings is greater than a width of each of the first wirings and a width of each of the third wirings.

12. The touch element as claimed in claim 10, wherein a part of the connection lines are disposed on a side of the substrate where the conductive through holes are disposed and surround a terminal of each of the first sensing series, and another part of the connection lines are located on a side of the substrate where the conductive through holes are not disposed and surround another terminal of each of the first sensing series.

13. The touch element as claimed in claim 9, wherein the substrate has a plurality of conductive through holes, the touch element further comprises a flexible circuit board and a plurality of third wirings, the flexible circuit board is disposed on the second surface and has a patterned circuit, the patterned circuit is located between the flexible circuit board and the substrate, and the third wirings are located on the first surface;

a part of the conductive through holes are located at the terminals of the first sensing series, so as to connect the first wirings and the patterned circuit,

another part of the conductive through holes are located at a side of the connection lines, so as to connect the patterned circuit and the third wirings.

14. The touch element as claimed in claim 9, further comprising:

a flexible circuit board, disposed on the first surface, wherein the flexible circuit board is located at the terminals of the first sensing series, a patterned circuit is disposed on the flexible circuit board, and the patterned circuit is electrically connected to the first wirings and insulated from the second sensing series; and

a plurality of third wirings, disposed on the first surface, wherein the patterned circuit is electrically connected to the third wirings.

15. The touch element as claimed in claim 14, further comprising:

an insulating adhesive layer, disposed between the flexible circuit board and the substrate, wherein the insulating adhesive layer covers the patterned circuit and exposes a portion of the patterned circuit to electrically connect the first wirings and the third wirings.

16. A touch display module, comprising:

a display module; and

a touch element, comprising;

a substrate, disposed on the display module, wherein the substrate comprises a first surface and a second surface opposite to the first surface;

a plurality of first sensing series, separated from each other, wherein the first sensing series are arranged along a first direction and disposed on the first surface, wherein each of the first sensing series comprises a plurality of first sensing pads connected to each other; and

a plurality of second sensing series, separated from each other, wherein the second sensing series are arranged along a second direction and disposed on the first surface, wherein each of the second sensing series comprises a plurality of second sensing pads distributed between the first sensing series and a plurality of connection lines connecting the second sensing pads, wherein each of the connection lines extends along an edge of one of the first sensing series and each of the connection lines comprises a first conductive line and a second conductive line, each of the first conductive lines and the corresponding second conductive line respectively extend along a side and another side of the first sensing series, each of the connection lines is electrically connected to the second sensing pads located at two opposite sides of the first sensing series, the first direction and the second direction intersect each other, the first sensing series and the second sensing series are electrically insulated from each other, the second surface is at least attached to a display surface and a side surface of the display module, and a part of each of the connection lines is located on the side surface.