Sensory structure of capacitive touch panel and capacitive touch panel having the same

• US 20110210935A1
• Filed: 03/01/2010
• Published: 09/01/2011
• Est. Priority Date: 03/01/2010
• Status: Active Grant

• Current Assignee: Cando Corporation
• Original Assignee: Cando Corporation
• Inventors: Chuang, Wen Ju
• Granted Patent: US 8,593,413 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Abstract

A two-dimensional sensory structure for the capacitive touch panel is provided. The provided two-dimensional sensory structure includes a substrate having plural first metal structures and second metal structures on a first surface thereof, a dot-like insulating layer located on the substrate and composed of plural insulating dots, and an electrode layer located on the dot-like insulating layer and composed of plural conductive traces. The insulating dots are each corresponding to the first metal structures respectively, and thereby a first part of the conductive traces arranged along a first direction are electrically connected to each other, and the conductive traces that are arranged along a second direction are electrically insulated therefrom. The thickness of the touch panel according to the invention is effectively reduced.

Claims

1. A sensory structure of a touch panel comprised of plural sensory units, each of said sensory units comprising:

a first connecting trace and a second connecting trace extending in a first direction and a second direction respectively, wherein said first direction and said second direction are different,

an insulator located between said first connecting trace and said second connecting trace to form a bridge structure;

a pair of two first mesh-typed sensory structures arranged along said first direction and electrically connected to said first connecting trace at two opposite sides of said bridge structure; and

a pair of two second mesh-typed sensory structures arranged along said second direction and electrically connected to said second connecting trace at two opposite sides of said bridge structure,

wherein said first connecting trace has a plan width of less than 30 μ

m.

2. The sensory structure of claim 1, wherein at least one of said first and said second mesh-typed sensory structures are formed by plural interlaced connecting traces.

3. The sensory structure of claim 1, wherein at least one of said first and said second mesh-typed sensory structures are formed by plural zigzag-arranged connecting traces.

4. The sensory structure of claim 1, wherein said first mesh-typed sensory structures and said second mesh-typed sensory structures are made of metal having a relatively lower resistance than indium tin oxide.

5. The sensory structure of claim 4, wherein said metal is silver (Ag).

6. The sensory structure of claim 4, wherein said metal is a metallic layer stack of molybdenum/aluminum/molybdenum (Mo/Al/Mo).

7. The sensory structure of claim 1, wherein said first mesh-typed sensory structures and said second mesh-typed sensory structures are respectively formed by an indium tin oxide (ITO) layer.

8. A sensory structure of a touch panel, comprising:

a substrate having a first surface;

a first electrode layer on said first surface, said first electrode layer being patterned to have plural island structures which are separately arranged on a first part of said first surface;

an insulating layer covering on each of said island structures to expose a second part of said first surface; and

a second electrode layer covering on said insulating layer and said second part of said first surface,

wherein said first electrode layer and said second electrode layer are respectively constructed by plural mesh-typed electrode structures connected to a corresponding first trace having a plan width of less than 30 μ

m and a corresponding second trace.

9. The sensory structure of claim 8, wherein said mesh-typed electrode structures are made of metal having a relatively lower resistance than indium tin oxide.

10. The sensory structure of claim 8, wherein at least ones of said plural mesh-typed electrode structures are formed by plural interlaced connecting traces.

11. The sensory structure of claim 8, wherein at least ones of said plural mesh-typed electrode structures are formed by plural zigzag-arranged connecting traces.

12. A sensory structure of a touch panel, comprising:

a substrate having a first surface;

a first electrode layer having a first part thereon located on said first surface;

an insulating layer located on said first part of said first electrode layer;

plural through-holes formed within said insulating layer and passing therethrough, wherein said first electrode layer has a second part thereof located on said insulating layer and connected to said first part by said through-holes; and

a second electrode layer patterned as being partially arranged on said insulating layer and separated from said second part of said first electrode layer,

wherein said first electrode layer and said second electrode layer are respectively constructed by plural mesh-typed electrode structures connected to a corresponding first trace and a corresponding second trace having a plan width of less than 30 μ

m.

13. A capacitive touch panel module, comprising:

a substrate having a first surface and a second surface;

a first electrode layer located on said first surface of said substrate and comprising plural first mesh-typed electrode structures, wherein said first mesh-typed electrode structures are separately arranged in a first direction;

an insulating layer covering each of said first electrode structures;

a second electrode layer located on said insulating layer and comprising plural second mesh-typed electrode structures connected to a metal line having a plan width of less than 30 μ

m, wherein said second mesh typed electrode structures are separately arranged in a second direction; and

a black matrix layer located on said second surface of said substrate,

wherein said first direction and said second direction are different and corresponding to said black matrix layer.

14. The capacitive touch panel module of claim 13, further comprising a filter layer located on said black matrix layer.

15. The capacitive touch panel module of claim 13, wherein said first electrode structures and said second electrode structures are formed by plural metallic traces.

16. The capacitive touch panel module of claim 15, wherein said first electrode layer and said second electrode layer are respectively one selected from an indium tin oxide layer or a metal layer having a relatively lower resistance of the indium tin oxide layer.

17. The capacitive touch panel module of claim 16, wherein said metal layer is a silver layer or a layer stack of molybdenum/aluminum/molybdenum (Mo/Al/Mo).

18. The capacitive touch panel module of claim 13, wherein said black matrix layer is oriented with respect to said first direction and said second direction.

19. The sensory structure of claim 13, wherein at least one of said first and said second mesh-typed electrode structures are formed by plural interlaced connecting traces.

20. The sensory structure of claim 13, wherein at least one of said first and said second mesh-typed electrode structures are formed by plural zigzag-arranged connecting traces.