TOUCH-SENSING ELECTRODE STRUCTURE AND TOUCH-SENSITIVE DEVICE

• US 20140054156A1
• Filed: 08/19/2013
• Published: 02/27/2014
• Est. Priority Date: 08/21/2012
• Status: Abandoned Application

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: SU, Kuo-Chang, CHANG, Ting-Yu, LIAO, Hsiao-Hui, HO, Kun-Chang, WU, Fa-Chen, LI, Kuang-Wei
• Application Number:
  US13/970,142
• Publication Number:
  US 20140054156A1
• Time in Patent Office: Days
• US Class Current: 200/600
• 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 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: H03K 2017/9602 characterised by the type or shape of the sensing electrodes
• CPC Class Codes: H03K 2217/960755 Constructional details of capacitive touch and proximity switches
• CPC Class Codes: H03K 2217/960785 with illumination

Abstract

A touch-sensing electrode structure includes multiple first electrodes and multiple second electrodes. Each first electrode includes a longitudinal part extending in a first direction and multiple branch parts connected to the longitudinal part. The second electrodes are disposed on at least one side of each longitudinal part, and each of the second electrodes at least spreads over a region between two adjacent branch parts of each of the first electrodes.

Claims

1. A touch-sensing electrode structure, comprising:

a plurality of first electrodes, each of the first electrodes having a longitudinal part extending in a first direction and a plurality of branch parts connected to the longitudinal part; and

a plurality of second electrodes disposed on at least one side of each longitudinal part, wherein each of the second electrodes at least spreads over a region between two adjacent branch parts of each of the first electrodes.

2. The touch-sensing electrode structure as claimed in claim 1, wherein the branch parts of one of the first electrodes have different widths measured in a second direction different to the first direction.

3. The touch-sensing electrode structure as claimed in claim 2, wherein the widths of the branch parts of the first electrode decrease progressively in a direction away from the longitudinal part of the first electrode.

4. The touch-sensing electrode structure as claimed in claim 1, wherein the branch parts of one of the first electrodes make different angles with the longitudinal part of the first electrode.

5. The touch-sensing electrode structure as claimed in claim 1, wherein at least two of the second electrodes are disposed symmetrically on two sides of the longitudinal part.

6. The touch-sensing electrode structure as claimed in claim 5, wherein each of the second electrodes comprises a plurality of branch parts, and the branch parts of the second electrode are adjacent to the longitudinal part or the branch parts of the first electrode.

7. The touch-sensing electrode structure as claimed in claim 6, wherein the branch parts of one of the second electrodes have different widths measured in a second direction different to the first direction.

8. The touch-sensing electrode structure as claimed in claim 7, wherein the widths of the branch parts of the second electrode decrease progressively in a direction away from the longitudinal part of the first electrode.

9. The touch-sensing electrode structure as claimed in claim 1, wherein each of the first electrodes is a signal-transmitting electrode and each of the second electrodes is a signal-sensing electrode.

10. The touch-sensing electrode structure as claimed in claim 1, wherein each of the branch parts of the first electrode is in the form of a first block, each of the second electrodes is in the form of a second block, the touch-sensing electrode structure has multiple first blocks and multiple second blocks, and the first blocks and the second blocks are alternately arranged on each of two opposed sides of the longitudinal part.

11. The touch-sensing electrode structure as claimed in claim 10, wherein the first blocks and the second blocks form a delta topological electrode layout.

12. The touch-sensing electrode structure as claimed in claim 10, wherein each of the first blocks is partitioned by the second electrode to form a plurality of first regions, and the first regions of the same first block have mutually different widths measured in a second direction substantially perpendicular to the first direction.

13. The touch-sensing electrode structure as claimed in claim 10, wherein each of the second blocks is partitioned by the first electrode to form a plurality of second regions, and the second regions of the same second block have mutually different widths measured in a second direction substantially perpendicular to the first direction.

14. A touch-sensitive device, comprising:

a substrate;

a touch-sensing electrode structure disposed on the substrate and having a plurality of first electrodes and second electrodes, wherein the touch-sensing electrode structure is partitioned to form a plurality of blocks adjacent to each other, and each of the blocks has at least one first electrode and a plurality of second electrodes;

a plurality of conductive wires, wherein each of the conductive wires is connected to one of the first electrodes or one of the second electrodes; and

a flexible printed circuit board electrically connected to the touch-sensing electrode structure, wherein the at least one first electrode and the plurality of second electrodes in the same block are connected to the flexible printed circuit board through the conductive wires to form a bonding area on the flexible printed circuit board, the flexible printed circuit board is provided with a plurality of bonding areas, and two adjacent bonding areas on the flexible printed circuit board are situated at different distances from the substrate.

15. The touch-sensitive device as claimed in claim 14, further comprising:

a plurality of grounding wires, wherein each of the grounding wires is disposed on a boundary between the two adjacent bonding areas.

16. The touch-sensitive device as claimed in claim 14, wherein a plurality of bonding pads are disposed in each of the bonding areas.

17. The touch-sensitive device as claimed in claim 14, further comprising:

a plurality of bus lines disposed on the flexible printed circuit board, wherein the plurality of second electrodes are divided into multiple electrode groups, each electrode group is formed by the second electrodes collected from each of the blocks, and the conductive wires connected to the second electrodes in the same electrode group are all connected to the same bus line.

18. The touch-sensitive display device as claimed in claim 17, wherein the bus lines are made of metal.

19. The touch-sensitive device as claimed in claim 14, further comprising:

a decorative layer disposed on a periphery of the substrate.

20. The touch-sensitive device as claimed in claim 19, wherein the decorative layer comprises at least one of ceramic, diamond-like carbon, colored ink, photo resist and resin.

21. The touch-sensitive device as claimed in claim 14, further comprising:

a passivation layer disposed on the substrate and covering the touch-sensing electrode structure.

22. The touch-sensitive device as claimed in claim 21, wherein the passivation layer is a refractive-index matching layer.

23. The touch-sensitive device as claimed in claim 14, wherein the substrate is an encapsulation substrate of an OLED, a color filter substrate, or an array substrate.

24. A touch-sensing electrode structure, comprising:

a plurality of first electrodes, each of the electrodes having a major part extending in a first direction and a plurality of branch parts connected to the major part; and

a plurality of second electrodes, disposed on at least one side of each major part, wherein each of the second electrodes at least spreads over a region between two adjacent branch parts of each of the first electrodes, and the branch parts of one of the first electrodes have different widths measured in a second direction different to the first direction.