TOUCH PANEL

• US 20110025640A1
• Filed: 03/01/2010
• Published: 02/03/2011
• Est. Priority Date: 07/29/2009
• Status: Active Grant

• Current Assignee: Cando Corporation
• Original Assignee: Cando Corporation
• Inventors: Lin, Yu-Kai, Chuang, Wen-Ju, Lin, Yih-Jer
• Granted Patent: US 8,405,634 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 3/0443 using a single layer of sensing electrodes

Abstract

A capacitive touch panel is disclosed. The structure of the touch panel is designed that the arrangement of the sensing units is not visible from outside. Moreover, the capacitive touch panel also has the advantage of having reduced thickness and simplified fabrication, and is easy to be combined with a liquid crystal display module.

Claims

1. A capacitive touch panel, comprising:

a substrate having a plurality of sensing units thereon, wherein two adjacent sensing units comprise a distance therebetween; and

a shielding layer covering the sensing units entirely, wherein the thickness of the shielding layer is adjusted with respect to the distance such that the sensing units are invisible from outside.

2. The capacitive touch panel of claim 1, wherein the shielding layer comprises an adhesive layer.

3. The capacitive touch panel of claim 1, wherein the distance is between 10-550 μ

m.

4. The capacitive touch panel of claim 3, wherein the thickness of the shielding layer is between 20-1300 μ

m.

5. The capacitive touch panel of claim 3, wherein the shielding layer comprises an adhesive layer having a thickness between 10-500 μ

m.

6. The capacitive touch panel of claim 1, wherein the shielding layer comprises a polyester film or a transparent film.

7. The capacitive touch panel of claim 1, wherein the shielding layer comprises a decoration.

8. A capacitive touch panel, comprising:

a substrate, having a plurality of sensing units and a plurality of dummy patterns thereon, wherein a first portion of the sensing units is connected along a first direction, a second portion of the sensing units is connected along a second direction, and the dummy patterns are disposed between two adjacent sensing units and electrically insulated to the sensing units; and

a shielding layer covering the sensing units and the dummy patterns entirely, wherein the thickness of the shielding layer is adjusted with respect to a distance between the sensing units and adjacent dummy patterns such that the sensing units are invisible from outside.

9. The capacitive touch panel of claim 8, wherein the shielding layer comprises an adhesive layer.

10. The capacitive touch panel of claim 8, wherein the shielding layer comprises a polyester film or a transparent film.

11. The capacitive touch panel of claim 8, wherein the shielding layer comprises a decoration.

12. A capacitive touch panel, comprising:

a substrate having a plurality of sensing units, wherein two adjacent sensing units comprise a distance therebetween;

a frame having a hollow opening for accommodating the substrate, wherein the frame and the substrate form a composite structure; and

an optical composite layer disposed on the frame, wherein the optical composite layer comprises a shielding layer and an ink layer, and the thickness of the shielding layer is adjusted with respect to the distance such that the sensing units are invisible from outside.

13. The capacitive touch panel of claim 12, wherein the thickness of the frame corresponds to the thickness of the substrate.

14. The capacitive touch panel of claim 12, wherein the frame comprises a plastic material or a metal material.

15. The capacitive touch panel of claim 12, further comprising a passivation layer disposed on the substrate for protecting the sensing units.

16. A frame used for assembling a capacitive touch panel, the frame comprising a first side for accommodating a sensing substrate and a second side for assembling the sensing substrate to a display module and four edge portions, wherein the four edge portions defining a hollowing opening for accommodating the sensing substrate and at least two of the edge portions of the frame comprises a plurality of recesses for accommodating the sensing substrate and at least two of the edge portions of the frame comprises a plurality of fasteners for fastening the display module.

17. The frame of claim 16, wherein the frame comprises plastic material or metal material.

18. The frame of claim 16, wherein the edge portions of the frame comprising the recesses are identical to the edge portions of the frame comprising the fasteners.

19. The frame of claim 16, wherein the edge portions of the frame comprising the recesses are different from the edge portions of the frame comprising the fasteners.