INTERACTIVE DISPLAY SYSTEM

• US 20080266273A1
• Filed: 04/24/2008
• Published: 10/30/2008
• Est. Priority Date: 04/24/2007
• Status: Abandoned Application

• Current Assignee: VIA Optronics GmbH
• Original Assignee: White Electronic Designs, Corp. (Microchip Technology Incorporated)
• Inventors: Doyle, Daniel R., Slobodin, David Elliott
• Application Number:
  US12/109,140
• Publication Number:
  US 20080266273A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements
• 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
• 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

An interactive display system including a touch sensor overlay having at least one sheet with integrated patterned transparent conductors configured to signal touch data. The interactive display system further including a display assembly and an optical layer interposed the touch sensor overlay and the display assembly.

Claims

1. An interactive display system comprising:

a touch sensor overlay including at least one sheet having integrated patterned transparent conductors configured to signal touch data;

a display assembly; and

an optical layer interposed the touch sensor overlay and the display assembly.

2. The interactive display system of claim 1 wherein the display is one of a liquid crystal display, an organic light emitting diode display, and an electronic paper display.

3. The interactive display system of claim 1, wherein at least one sheet of the touch sensor overlay includes a first side and an opposing side, where a first set of conductors is on the first side and a second set of complementary conductors are on the opposing side.

4. The interactive display system of claim 1, wherein the conductors are in a grid pattern.

5. The interactive display system of claim 1, wherein the touch sensor overlay includes a first sheet with a first set of conductors and a second sheet with a second set of conductors.

6. The interactive display system of claim 5, wherein the first sheet is optically bonded with a touch sensor overlay optical adhesive to the second sheet.

7. The interactive display system of claim 6, wherein the touch sensor overlay optical adhesive has a refractive index substantially similar to one of the first sheet and the second sheet.

8. The interactive display system of claim 1, wherein the at least one sheet is one of a glass sheet and a polymer film sheet.

9. The interactive display system of claim 1, wherein the optical layer includes an optical adhesive bonding at least one portion of the display assembly to the touch sensor overlay, where the optical adhesive has a refractive index substantially similar to one of the at least one optical sheet of the touch sensor overlay and to an exterior coupling surface of the display assembly.

10. The interactive display system of claim 1, wherein the conductors are indium tin oxide.

11. The interactive display system of claim 1, further comprising a circular polarizer coupled to the touch sensor overlay.

12. The interactive display system of claim 1, further comprising a quarter wave retarder disposed between the display assembly and the touch sensor overlay.

13. An interactive display system comprising:

a display assembly;

a transparent capacitive touch sensor overlay with a first sheet with integrated electrodes bonded to a second sheet with an touch sensor overlay optical adhesive where the touch sensor overlay optical adhesive has a refractive index substantially similar to one of the first sheet and the second sheet;

a optical layer interposed the display assembly and the touch sensor overlay; and

at least one signal processing chip electronically coupled to the touch sensor overlay.

14. The interactive display system of claim 13, wherein the integrated electrodes is patterned indium tin oxide.

15. The interactive display system of claim 13, wherein the first sheet is a glass sheet and the second sheet is a polymer film sheet.

16. The interactive display system of claim 13, wherein the second sheet includes a second set of integrated electrodes.

17. The interactive display system of claim 13, wherein the optical layer has an index of refraction substantially similar to an exterior surface of the display assembly.

18. A method for construction of an interactive display system comprising:

integrating a patterned transparent capacitive material on one or more sheets to form a touch sensor overlay; and

bonding the touch sensor overlay to a display assembly.

19. The method of claim 18, further comprising, prior to bonding the touch sensor overlay, applying an optical adhesive to one of the touch sensor overlay and the display assembly;

and pre-curing the optical adhesive.

20. The method of claim 18, wherein integrating a patterned transparent capacitive material including optically bonding a first sheet and a second sheet.

21. The method of claim 18, wherein integrating a patterned transparent capacitive material includes layering of conductors of different indices of refraction for anti-reflective purposes.