Resistive touchscreen with programmable display coversheet

• US 20050174335A1
• Filed: 02/10/2004
• Published: 08/11/2005
• Est. Priority Date: 02/10/2004
• Status: Abandoned Application

• Current Assignee: Tyco Electronics Corporation (TE Connectivity Ltd. (United Kingdom))
• Original Assignee: Elo Touchsystems Incorporated (Elo Touch Solutions, Inc.)
• Inventors: Adriani, Paul M., Kent, Joel Christopher
• Application Number:
  US10/776,110
• Publication Number:
  US 20050174335A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A resistive touchscreen having a programmable display, such as an emissive display matrix of organic light-emitting diodes, or a reflective electronic paper display, built into the coversheet. The touchscreen may be of any resistive type, including 4-wire, 5-wire, and diode 3-wire. A touch/display system is thus provided in which there is little or no degradation of the displayed image due to image transmission through the internal touch sensor components, and in which the internal touch sensor components may be constructed of opaque materials.

Claims

1. A touchscreen, comprising:

a substrate having a first conductive region on a top surface thereof; and

a coversheet having a second conductive region on a bottom surface thereof, the coversheet bottom surface facing and spaced apart from the substrate top surface, the coversheet further comprising a programmable display,

the coversheet sufficiently flexible that a force applied to the coversheet causes the first and second conductive regions to make electrical contact in a location proximate the applied force.

2. The touchscreen of claim 1, the coversheet sufficiently resilient that, in an absence of any force applied to the coversheet, no electrical contact is made between the first and second conductive regions.

3. The touchscreen of claim 1, in which a voltage gradient is applied to the first conductive region for a first position coordinate measurement, and a voltage gradient is applied to the second conductive region for a second position coordinate measurement.

4. The touchscreen of claim 1, in which a first voltage gradient is applied to the first conductive region for a first position coordinate measurement and a second voltage gradient is applied to the first conductive region for a second position coordinate measurement.

5. The touchscreen of claim 4, further comprising diodes connected to the first conductive region.

6. The touchscreen of claim 1, wherein the programmable display is a video display.

7. The touchscreen of claim 1 wherein the programmable display is an emissive display.

8. The touchscreen of claim 7, the display comprising one or more organic light-emitting diodes (“

OLEDs”

).

9. The touchscreen of claim 8, the coversheet comprising a flexible polymer substrate on which the one or more OLEDs are fabricated.

10. The touchscreen of claim 8, the coversheet comprising a flexible glass substrate on which the one or more OLEDs are fabricated.

11. The touchscreen of claim 10, the glass substrate having a thickness of about 200 microns or less.

12. The touchscreen of claim 1, wherein the programmable display is a reflective display.

13. The touchscreen of claim 12, the display comprising electronic paper.

14. The touchscreen of claim 1, the coversheet top surface comprising a substantially transparent protective polymer layer.

15. The touchscreen of claim 14, the protective polymer layer configured for use as a writing surface.

16. The touchscreen of claim 14, wherein the protective polymer layer is removable.

17. The touchscreen of claim 1, one or both of the first and second conductive regions comprising an opaque material.

18. The touchsceen of claim 1, one or both of the first and second conductive regions comprising a conductive polymer coating.

19. A touchscreen, comprising:

a substrate having a top surface;

a coversheet having a bottom surface and a top surface, the coversheet bottom surface facing the substrate top surface;

a first conductive coating provided on the substrate top surface;

a second conductive coating provided on the coversheet bottom surface; and

a programmable display configured to generate images visible from the coversheet top surface,

the coversheet sufficiently flexible that a force applied to the coversheet top surface causes the first and second conductive coatings to make electrical contact in a location proximate the applied force.

20. The touchscreen of claim 19, further comprising control circuitry configured to identify two dimensional coordinates of the location of a force applied to the coversheet.

21. The touchscreen of claim 19, the display comprising organic light-emitting diodes.

22. The touchscreen of claim 19, the programmable display comprising electronic paper.

23. A touchscreen, comprising:

an interior touch sensor; and

an exterior programmable display positioned in registration with the touch sensor such that, when elements displayed by the display are touched, the touch sensor determines a two-dimensional position of the touch on the display.

24. The of touchscreen of claim 23, the touch sensor comprising

a substrate having a first conductive region on an exterior surface thereof, and

a coversheet having a second conductive region on an interior surface thereof, the coversheet interior surface facing and spaced apart from the substrate exterior surface,

wherein the coversheet is sufficiently flexible such that a touch to the display causes the first and second conducive regions to make electrical contact in a location proximate the touch.

25. The touchscreen of claim 23, wherein the programmable display is an emissive display.

26. The touchscreen of claim 23, wherein the programmable display is a reflective display.

27. The touchscreen of claim 25 or 26, wherein the programmable display is a video display.