User specific recognition of intended user interaction with a digitizer

• US 20080012838A1
• Filed: 07/11/2007
• Published: 01/17/2008
• Est. Priority Date: 07/13/2006
• Status: Active Grant

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: N-Trig Ltd (Microsoft Corporation)
• Inventors: Rimon, Ori
• Granted Patent: US 8,686,964 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• 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
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A method and system for recognition of an intended user interaction with a digitizer is provided, the method comprising characterizing an intended user interaction input signals of a specific user, storing at least one characterization criterion from the characterization, and determining if a subsequently detected input signals meets the at least one characterization criterion.

Claims

1. A method for recognition of an intended user interaction with a digitizer, the method comprising:

characterizing an intended user interaction input signals of a specific user;

storing at least one characterization criterion from the characterization; and

determining if a subsequently detected input signals meets the at least one characterization criterion.

2. The method according to claim 1 wherein the intended user interaction is finger touch.

3. The method according to claim 1 wherein the intended user interaction is finger hovering.

4. The method according to claim 1 wherein the intended user interaction is detected by capacitive touch methods.

5. The method according to claim 1 comprising accepting the subsequently detected input signals for user interaction on the condition that the subsequently detected input signals meet the at least one characterization criterion.

6. The method according to claim 1 comprising rejecting the subsequently detected input signals for user interaction that do not meet the at least one characterization criterion.

7. The method according to claim 6 wherein the rejecting is implemented by the controller.

8. The method according to claim 1 wherein the at least one characterization criterion defines a range in number of conductive lines on the digitizer from which the user interaction input signals were obtained.

9. The method according to claim 1 wherein the at least one characterization criterion defines a pattern of signal amplitudes of the intended user interaction input signals.

10. The method according to claim 1 wherein the at least one characterization criterion defines a range of an area on the digitizer over which the intended user interaction input signals were obtained.

11. The method according to claim 1 wherein the at least one characterization criterion includes a range in a dimension of an area over which the intended user interaction input signals were obtained.

12. The method according to claim 1 wherein the at least on characterization criterion is selected from a group consisting of shape, pressure, and gradient pattern.

13. The method according to claim 1 wherein characterization is performed once for the specific user.

14. The method according to claim 1 wherein the characterization is performed during a system startup.

15. The method according to claim 1 wherein the characterization is updated periodically.

16. The method according to claim 1 wherein the characterization is performed automatically during user operation of the digitizer by the specific user.

17. The method according to claim 1 wherein the characterization is based on averages of a plurality of input signals.

18. The method according to claim 1 wherein the characterization is performed during a dedicated calibration procedure.

19. The method according to claim 1 comprising requesting user identification.

20. The method according to claim 1 wherein a host computer associated with the digitizer supplies the user identification.

21. The method according to claim 1 wherein the characterization includes characterization of a finger of the specific user, selected for user interaction.

22. The method according to claim 1 wherein the characterization includes characterization of a plurality of fingers of the specific user.

23. The method according to claim 1 comprising:

characterizing palm resting input signals of the specific user; and

determining a characterization criterion to differentiate between the intended user interaction input signals and the palm resting input signals.

24. The method according to claim 1 comprising performing palm rejection on subsequently detected input signals that do not meet the at least one characterization criterion.

26. The system according to claim 1 wherein the intended user interaction is finger touch.

27. The system according to claim 1 wherein the intended user interaction is finger hovering.

28. The system according to claim 1, wherein the intended user interaction is detected by capacitive touch methods.

25. A system for recognizing an intended user interaction with a digitizer comprising:

a digitizer operative to detect intended user interaction input signals of a specific user;

a controller operative to detect at least one characterization criterion to characterize the user interaction input signals of the specific user and to determine if subsequently detected input signals meet the at least one characterization criterion; and

a memory operative to store the at least one characterization criterion.

29. The system according to claim 25 wherein the controller is operative to accept the subsequently detected input signals for user interaction with the digitizer on the condition that the subsequently detected input signals meet the at least one characterization criterion.

30. The system according to claim 25 wherein the controller is operative to reject the subsequently detected input signals for user interaction with the digitizer on the condition that the subsequently detected input signals do not meet the at least one characterization criterion.

31. The system according to claim 25 comprising a host computer associated with the digitizer, wherein the digitizer forwards to the host computer input signals that meet the at least one characterization criterion.

32. The system according to claim 31 wherein input signals that do not meet the at least one characterization criterion are rejected for forwarding.

33. The system according to claim 25 wherein the digitizer performs palm rejection on input signals that do not meet the at least one characterization criterion.

34. The system according to claim 25 comprising a digitizer sensor, wherein the digitizer sensor comprises a grid of conductive lines and wherein the memory is operative to store a range of numbers of conductive lines from which the intended user interaction input signals were obtained.

35. The system according to claim 34 wherein the digitizer sensor is transparent.

36. The system according to claim 25 wherein the memory is operative to store characterization of a pattern of signal amplitudes of the intended user interaction input signals.

37. The system according to claim 25 wherein the memory is operative to store a range of an area over which the intended user interaction input signals were detected.

38. The system according to claim 25 wherein the memory is operative to store a range of a dimension of an area over which the intended user interaction input signals was detected.

39. The system according to claim 25 wherein the at least on characterization criterion is selected from a group consisting of shape, pressure, and gradient pattern.

40. The system according to claim 25 wherein the controller is operative to characterize the intended user interaction input signals once for the specific user.

41. The system according to claim 25 wherein the controller is operative to characterize the intended user interaction input signals during a system startup.

42. The system according to claim 25 wherein the controller is operative to update the at least one characterization criterion periodically based on the subsequent detected input signals.

43. The system according to claim 25 wherein the controller is operative to detect at least one characterization criterion automatically during the specific users operation of the digitizer system.

44. The system according to claim 25 wherein the characterization is based on averages of a plurality of input signals.

45. The system according to claim 25 comprising a GUI to guide the specific user through a calibration procedure to characterize the intended user interaction input signals.

46. The system according to claim 25 wherein the controller is operative to identify the specific user.

47. The system according to claim 25 wherein a host computer associated with the digitizer is operative to identify the specific user.

48. The system according to claim 25 wherein the controller is operative to characterize the intended user interaction input signals of a finger of the specified user, selected for user interaction.

49. The system according to claim 25 wherein the controller is operative to characterize the intended user interaction input signals of a plurality of fingers of the specified user.

50. The system according to claim 25 wherein the controller is operative to characterize palm resting input signals of the specified user and to determine a characterization criterion to differentiate between the intended user interaction input signals and the palm resting input signals.

51. The system according to claim 25 wherein the intended user interaction is stylus together with finger touch.

52. The system according to claim 51 wherein detection of the stylus is implemented to characterize a concurrent finger touch.