TOUCH PANEL AND TOUCH DISPLAY APPARATUS

• US 20150042908A1
• Filed: 08/08/2014
• Published: 02/12/2015
• Est. Priority Date: 08/08/2013
• Status: Abandoned Application

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Wang, Wen-Chun, Chang, Ting-Yu, Hsu, Ching-Fu, Tseng, Ying-Ching
• Application Number:
  US14/454,731
• Publication Number:
  US 20150042908A1
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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 panel, including a substrate, a first electrode structure, a second electrode structure, and an insulating layer. The first electrode structure includes first electrode units and second electrode units, wherein each first electrode unit extends in a first direction, each second electrode unit extends in a second direction, and the first electrode units interlace the second electrode units. The first electrode structure is configured between the second electrode structure and the substrate. The insulating layer is configured between the first electrode structure and the second electrode structure to electrically insulate the first electrode structure from the second electrode structure. In a first touch mode, the second electrode structure does not perform a touch sensing function, while the first electrode units and the second electrode units are electrically independent respectively and perform the touch sensing function. In a second touch mode, the second electrode structure performs the touch sensing function.

Claims

1. A touch panel, comprising:

a substrate, having an operating area;

a first electrode structure, located within the operating area, comprising a plurality of first electrode units and a plurality of second electrode units, each of the first electrode units extending in a first direction, each of the second electrode units extending in a second direction, and the first electrode units and the second electrode units interlacing with each other;

a second electrode structure, evenly distributed within the operating area, and the first electrode structure being disposed between the second electrode structure and the substrate, wherein in a first touch mode, the second electrode structure does not perform a touch sensing function and the first electrode units and the second electrode units are electrically independent, respectively and perform the touch sensing function;

in a second touch mode, the second electrode structure performs the touch sensing function; and

an insulating layer, disposed between the first electrode structure and the second electrode structure to electrically insulate the first electrode structure from the second electrode structure.

2. The touch panel according to claim 1, wherein an n^th first electrode unit, an m^th first electrode unit, an i^th second electrode unit, and a j^th second electrode unit of the first electrode structure are electrically independent from one another in the second touch mode to constitute a plurality of axial sensing electrodes, and the first electrode units between the n^th and the m^th first electrode units as well as the second electrode units between the i^th and the j^th second electrode units are electrically connected together in the second touch mode to constitute a plane sensing electrode, in which n, m, i, j are positive integers greater than zero, a difference between n and m is greater than 2, and a difference between i and j is greater than 2.

3. The touch panel according to claim 1, wherein the second electrode structure is a driving electrode in the second touch mode.

4. The touch panel according to claim 1, wherein the second electrode structure is connected to a ground potential or a common potential in the first touch mode.

5. The touch panel according to claim 1, further comprising a third electrode structure disposed on the substrate, the third electrode structure being located between the first electrode structure and the substrate, and the third electrode structure comprising a plurality of axial sensing electrodes surrounding a periphery of the operating area.

6. The touch panel according to claim 5, wherein the third electrode structure performs the touch sensing function in the second touch mode, and the first electrode units and the second electrode units of the first electrode structure are electrically connected together in the second touch mode to constitute a plane sensing electrode.

7. The touch panel according to claim 5, further comprising a fourth electrode structure, distributed within the operating area along a gap between the first electrode units and the second electrode units to constitute a plane sensing electrode in the second touch mode.

8. The touch panel according to claim 7, further comprising a plurality of insulating structures disposed at a position where the fourth electrode structure, the first electrode units, and the second electrode units interlace with one another.

9. The touch panel according to claim 1, wherein the second electrode structure is disposed on a carrier layer, and the carrier layer is adhered to the substrate via an optical adhesive.

10. The touch panel according to claim 9, wherein the second electrode structure is located between the carrier layer and the optical adhesive.

11. The touch panel according to claim 1, wherein the first electrode structure is configured on a carrier layer adhered to the substrate via an optical adhesive so that the first electrode structure is located between the carrier layer and the substrate.

12. The touch panel according to claim 1, wherein, in the first touch mode, the first electrode units are sensing electrodes and the second electrode units are driving electrodes;

alternatively, the first electrode units are driving electrodes and the second electrode units are sensing electrodes.

13. The touch panel according to claim 1, wherein each of the first electrode units and the second electrode units is an electrode series, and the electrode series comprises a plurality of electrode patterns and connecting patterns connecting the electrode patterns in series.

14. The touch panel according to claim 13, wherein the electrode patterns and the connecting patterns in at least one electrode series have the same material or different material.

15. A touch panel, comprising:

a substrate, having an operating area;

a first electrode structure, located within the operating area;

a second electrode structure, disposed between the first electrode structure and the substrate and comprising a plurality of axial sensing electrodes, wherein the second electrode structure does not perform a touch sensing function while the first electrode structure performs the touch sensing function in the first touch mode, and the second electrode structure performs the touch sensing function while the first electrode structure does not perform the touch sensing function in a second touch mode; and

an insulating layer, disposed between the first electrode structure and the second electrode structure to electrically insulate the first electrode structure from the second electrode structure.

16. The touch panel according to claim 15, wherein the axial sensing electrodes of the second electrode structure are located within a periphery area outside the operating area, and wherein the axial sensing electrodes of the second electrode structure comprise a first axial sensing electrode and a second axial sensing electrode, and the first axial sensing electrode and the second axial sensing electrode are respectively located at two opposite sides of the operating area.

17. The touch panel according to claim 16, wherein the axial sensing electrodes of the second electrode structure further comprise a third axial sensing electrode and a fourth axial sensing electrode, the first axial sensing electrode, the second axial sensing electrode, the third axial sensing electrode, and the fourth axial sensing electrode surround the operating area, and the third axial sensing electrode and the fourth axial sensing electrode are respectively located at another two opposite sides of the operating area.

18. A touch panel, having a light-penetrable area and a light-shielding area, the light-shielding area being located at at least one side of the light-shielding area, the touch panel comprising:

a first substrate;

a second substrate, disposed substantially in parallel with the first substrate;

a decoration layer, disposed on the second substrate to constitute the light-shielding area;

a first electrode structure, disposed on the first substrate and at least disposed within the light-penetrable area, the first electrode structure comprising a plurality of sensing electrodes and a plurality of wirings, and the wirings and the sensing electrodes being electrically connected; and

a second electrode structure, at least disposed on the decoration layer, the second electrode structure being located between the first electrode structure and the second substrate, the second electrode structure and the first electrode structure being electrically independent from each other, the second electrode structure comprising a plurality of additional sensing electrodes or a plurality of axial sensing electrodes.

19. The touch panel according to claim 18, wherein a portion of the wirings overlaps with a portion of the additional sensing electrode.

20. The touch panel according to claim 19, wherein a shielding layer is disposed between the first electrode structure and the second electrode structure so as to block mutual interference between the first electrode structure and the second electrode structure.