TOUCH MODULE

• US 20110181542A1
• Filed: 07/19/2010
• Published: 07/28/2011
• Est. Priority Date: 01/28/2010
• Status: Abandoned Application

• Current Assignee: Howay Corp.
• Original Assignee: Howay Corp.
• Inventors: Yang, Yan-Mei
• Application Number:
  US12/838,550
• Publication Number:
  US 20110181542A1
• Time in Patent Office: Days
• US Class Current: 345/174
• 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 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 module includes: a sending unit disposed between a first surface of a first substrate and a second surface of a second substrate and operable to generate a sensing output in response to touching on or approaching the first substrate by a conductive object; and a control circuit unit disposed on the first surface of the substrate, exposed from the second substrate, receiving the sensing unit from the sensing unit through first and second conductive traces on the first surface of the first substrate, and operable to generate a control output based on the sensing output received thereby.

Claims

1. A touch module comprising:

a first substrate having a first surface;

a second substrate opposite to said first substrate and having a second surface that faces said first surface of said first substrate;

a trace unit formed on said first surface of said first substrate, and including a plurality of first conductive traces and a plurality of second conductive traces, each of said first and second conductive traces having an end portion covered by said second substrate;

a sensing unit disposed between said first surface of said first substrate and said second surface of said second substrate, and connected electrically to said end portions of said first and second conductive traces of said trace unit, said sensing unit being operable to generate a sensing output in response to touching on or approaching said first substrate by a conductive object; and

a control circuit unit disposed on said first surface of said first substrate, exposed from said second substrate, and coupled to said first and second conductive traces of said trace unit such that said control circuit unit receives the sensing output generated by said sensing unit through said first and second conductive traces of said trace unit, said control circuit unit being operable to generate a control output based on the sensing output received thereby.

2. The touch module as claimed in claim 1, wherein said control circuit unit is in the form of a single control chip.

3. The touch module as claimed in claim 2, wherein said single control chip is mounted on said first surface of said first substrate by one of chip-on-glass process and chip-on-film process.

4. The touch module as claimed in claim 1, wherein said control circuit unit includes:

a first control chip mounted on said first surface of said first substrate and connected electrically to said first conductive traces of said trace unit; and

a second control chip mounted on said first surface of said first substrate and connected electrically to said second conductive traces of said trace unit and coupled wiredly to said first control chip, said second control chip being operable to generate the control output.

5. The touch module as claimed in claim 4, wherein said trace unit 5 further includes a transmission trace interconnecting electrically said first and second control chips.

6. The touch module as claimed in claim 1, wherein said sensing unit is of capacitive sensing.

7. The touch module as claimed claim 1, wherein:

said sensing unit includes spaced apart first and second electrode layers formed respectively on said first surface of said first substrate and said second surface of said second substrate;

said first electrode layer is formed with a plurality of first electrode patterns extending in a longitudinal direction and spaced apart from each other in a transverse direction that is transverse to the longitudinal direction, each of said first electrode patterns being coupled to said end portion of a corresponding one of said first conductive traces of said trace unit; and

said second electrode layer is formed with a plurality of second electrode patterns extending in the transverse direction and spaced apart from each other in the longitudinal direction, each of said second electrode patterns overlapping and being connected electrically to said end portion of a corresponding one of said second conductive traces of said trace unit.

8. The touch module as claimed in claim 7, wherein said sensing unit further includes:

an insulating layer formed between said first and second electrode layers for spacing said first electrode layer apart from said second electrode layer; and

a plurality of conducting sections disposed between said first and second electrode layers, each of said conducting sections interconnecting electrically a corresponding one of said second electrode patterns and said end portion of a corresponding one of said second conductive traces of said trace unit.

9. The touch module as claimed in claim 8, wherein said insulating layer is made from a transparent insulating material.

10. The touch module as claimed in claim 9, wherein said transparent insulating material is one of transparent plastic, a transparent adhesive and glass.

11. The touch module as claimed in claim 8, wherein each of said first and second electrode layers, said conducting sections, and said first and second conductive traces is made from a transparent conductive material.

12. The touch module as claimed in claim 11, wherein said transparent conductive material is one of indium tin oxide and zinc oxide.

13. The touch module as claimed in claim 8, wherein each of said conducting sections is attached between the corresponding one of said second electrode patterns and said end portion of the corresponding one of said second conductive traces of said trace unit by means of one of a conductive adhesive and an anisotropic conductive film.

14. The touch module as claimed in claim 1, wherein said sensing unit includes:

an electrode layer formed on said first surface of said first substrate, and formed with a plurality of spaced apart first electrode patterns each extending in a longitudinal direction and coupled to said end portion of a corresponding one of said first conductive traces of said trace unit, and a plurality of spaced apart electrode units arranged in the longitudinal direction, each of said electrode units being spaced apart from said first electrode patterns and including a plurality of spaced apart second electrode patterns arranged in a transverse direction transverse to the longitudinal direction; and

a plurality of bridging members formed between said electrode layer and said second surface of said second substrate and coupled respectively to said end portions of said second conductive traces of said trace unit, each of said bridging members extending in the transverse direction across said first electrode patterns, being spaced apart from said first electrode patterns, and being in electrical contact with said second electrode patterns of a corresponding one of said electrode units.

15. The touch module as claimed in claim 14, wherein each of said bridging members is made from a transparent conductive material.

16. The touch module as claimed in claim 14, wherein said sensing unit further includes an insulating layer formed on said electrode layer for covering entirely said first electrode patterns, and formed with a plurality of through holes corresponding respectively to said second electrode patterns of said electrode units such that each of said bridging members extends into corresponding ones of said through holes in said insulating layer to contact electrically said second electrode patterns of the corresponding one of said electrode units.

17. The touch module as claimed in claim 16, wherein said insulating layer is made from a transparent insulating material.

18. The touch module as claimed in claim 14, wherein said sensing unit further includes a plurality of spacing unit each formed on a corresponding one of said first electrode patterns, each of said spacing units including a plurality of spaced apart insulating pads each disposed between a corresponding one of said bridging members and the corresponding one of said first electrode patterns to thereby space the corresponding one of said bridging members apart from the corresponding one of said first electrode patterns.

19. The touch module as claimed in claim 18, wherein each of said insulating pads is made from a transparent insulating material.

20. The touch module as claimed in claim 1, wherein each of said first and second substrates is made from a transparent material.