Method and system for calibrating a touch screen

• US 20080100586A1
• Filed: 10/26/2006
• Published: 05/01/2008
• Est. Priority Date: 10/26/2006
• Status: Abandoned Application

• Current Assignee: Deere & Company
• Original Assignee: Deere & Company
• Inventors: Smart, David Charles
• Application Number:
  US11/588,657
• Publication Number:
  US 20080100586A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment

Abstract

A method for calibrating a touch screen. Method may be comprised of determining an area for a region suitable for receiving, excluding activations determined to be located within a defined distance from the outer edge of the area determined for the region, accumulating a pattern of activations for a centroid within the region, and tuning a calibration factor to reposition the centroid within the center of the region.

Claims

1. A method for calibrating a touch screen comprising

determining region parameters for a region defining a discrete input area;

accumulating a pattern of activations for a centroid within said region;

tuning a calibration factor; and

repositioning said centroid within the center of said region.

2. The method of claim 1, wherein said tuning a calibration factor is determined by centroid activation accumulations.

3. The method of claim 1, further comprising accepting a repositioning determination and fine tuning the reposition determination.

4. The method of claim 1, further comprising detecting a change in users.

5. The method of claim 1, further comprising excluding activations determined to be located within a defined distance from an outer edge of said region parameters determined for said region.

6. The method of claim 1, wherein the touch screen is a resistive, capacitive, surface acoustic, near-field or infrared touch screen.

7. The method of claim 1, wherein the touch screen is responsive to one or more distinct touch forces.

8. The method of claim 7, wherein the one or more distinct touch forces occur simultaneously.

9. A computer-readable medium having computer-executable instructions for performing a method for calibrating a touch screen comprising:

determining region parameters for a region defining a discrete area;

accumulating a pattern of activations for a centroid within said region;

tuning a calibration factor; and

repositioning said centroid within the center of said region.

10. The computer-readable medium of claim 9, wherein the touch screen is a resistive, capacitive, surface acoustic, near-field or infrared touch screen.

11. The computer-readable medium of claim 9, wherein the touch screen is responsive to one or more distinct touch forces.

12. The computer-readable medium of claim 11, wherein the one or more distinct touch forces occur simultaneously.

13. The computer-readable medium of claim 9, wherein said tuning a calibration factor is determined by centroid activation accumulations.

14. The computer-readable medium of claim 9, further having computer-executable instructions for excluding activations determined to be located within a defined distance from an outer edge of said region parameters determined for said region.

15. A system for calibrating a touch screen comprising:

a touch sensor suitable for receiving a touch sense, said touch sensor comprising a plurality of individually defined touch sensor regions;

a controller, operably coupled to said touch sensor, suitable for converting said touch sense into touch sense data; and

a processor operably coupled to said controller,

wherein said processor is suitable for determining region parameters for said plurality of touch sensor regions, accumulating a pattern of activations for a centroid within a touch sensor region, tuning a calibration factor and repositioning said centroid within the center of said touch sensor region.

16. The system of claim 15, wherein the touch sensor is suitable for providing user alteration detection.

17. The system of claim 15, wherein the touch sensor is responsive to one or more distinct touch forces occurring simultaneously.

18. The system of claim 15, wherein the controller is suitable for real-time review of touch sensor data as it is transmitted.

19. The system of claim 15, wherein the processor is a control logic processor.

20. The system of claim 15, wherein the processor stores said pattern of activations within a said touch sensor region in a database.

21. The system of claim 15, wherein the processor further excludes activations determined to be located within a defined distance from the outer edge of said region parameters.