TOUCH PANEL ASSEMBLY

• US 20090135159A1
• Filed: 11/21/2008
• Published: 05/28/2009
• Est. Priority Date: 11/23/2007
• Status: Abandoned Application

• Current Assignee: Acrosense Technology Company Limited
• Original Assignee: Acrosense Technology Company Limited
• Inventors: Sun, Jeng-Hung
• Application Number:
  US12/275,698
• Publication Number:
  US 20090135159A1
• 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 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch panel assembly includes: a transparent front cover adapted to cover a screen of a display; and a touch control unit including a transparent multi-layered structure deposited on the transparent front cover. The multi-layered structure defines a plurality of transparent sensor areas, each of which is operable to sense an object when the object touches or closely approaches a location on the transparent front cover that corresponds to the respective one of the sensor areas.

Claims

1. A touch panel assembly comprising:

a transparent front cover adapted to cover a screen of a display; and

a touch control unit including a transparent multi-layered structure deposited on said transparent front cover, said multi-layered structure defining a plurality of sensor areas, each of which is operable to sense an object when the object touches or closely approaches a location on said transparent front cover that corresponds to the respective one of said sensor areas.

2. The touch panel assembly of claim 1, wherein said multi-layered structure includes a patterned sensor-forming layer deposited on said transparent front cover and including a plurality of first electrodes and a plurality of second electrodes, each of which cooperates with at least an adjacent one of said first electrodes to define a capacitor therebetween, said capacitors defined by said first and second electrodes defining said sensor areas, respectively.

3. The touch panel assembly of claim 2, wherein said multi-layered structure further includes a transparent layer deposited on one side of said sensor-forming layer opposite to said transparent front cover.

4. The touch panel assembly of claim 3, wherein said multi-layered structure further includes a grounding layer deposited on one side of said transparent layer opposite to said sensor-forming layer.

5. The touch panel assembly of claim 4, wherein said grounding layer is made from a transparent electrically conductive material.

6. The touch panel assembly of claim 2, wherein said first and second electrodes are made from a transparent non-metallic electrically conductive material.

7. The touch panel assembly of claim 3, wherein said transparent layer is made from an electrically insulative material.

8. The touch panel assembly of claim 1, wherein said multi-layered structure includes a first transparent layer deposited on said transparent front cover, and a patterned sensor-forming layer that is deposited on one side of said first transparent layer opposite to said transparent front cover, and that includes a plurality of first electrodes and a plurality of second electrodes, each of which cooperates with at least an adjacent one of said first electrodes to define a capacitor therebetween, said capacitors defined by said first and second electrodes defining said sensor areas, respectively.

9. The touch panel assembly of claim 8, wherein said multi-layered structure further includes a second transparent layer deposited on one side of said sensor-forming layer opposite to said first transparent layer.

10. The touch panel assembly of claim 9, wherein said multi-layered structure further includes a grounding layer deposited on one side of said second transparent layer opposite to said sensor-forming layer.

11. The touch panel assembly of claim 10, wherein said grounding layer is made from a transparent electrically conductive material.

12. The touch panel assembly of claim 8, wherein said first and second electrodes are made from a transparent non-metallic electrically conductive material.

13. The touch panel assembly of claim 9, wherein said first and second transparent layers are made from an electrically insulative material.

14. The touch panel assembly of claim 1, wherein said transparent front cover is made from a material selected from the group consisting of glass, polymethylmethacrylate (PMMA), polyvinylchloride (PVC), polypropylene (PP), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polycarbonate (PC).

15. A touch panel display comprising:

a housing defining a window;

a screen mounted in said window;

a transparent front cover covering said window and spaced apart from said screen; and

a touch control unit including a transparent multi-layered structure deposited on said transparent front cover and disposed between said screen and said transparent front cover, said multi-layered structure defining a plurality of sensor areas, each of which is operable to sense an object when the object touches or closely approaches a location on said transparent front cover that corresponds to the respective one of said sensor areas.