Information input device, information input method, information input-output device, storage medium, and electronic unit

• US 8,482,538 B2
• Filed: 05/18/2010
• Issued: 07/09/2013
• Est. Priority Date: 05/26/2009
• Status: Active Grant

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Inventors: Tsuzaki, Ryoichi, Yamaguchi, Kazunori
• Primary Examiner(s): JOSEPH, DENNIS P
• Application Number:
  US12/781,964
• Publication Number:
  US 20100302203A1
• Time in Patent Office: 1,148 Days
• Field of Search: 345173-178, 715863-866
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires

Abstract

An information input device includes an input panel and one or more circuits. The one or more circuits are configured to determine first, second and third representations of possible proximity of an object to an input panel from first, second and third input frames, respectively. The second input frame is generated after the first input frame, and the third input frame is generated after the second input frame. The one or more circuits are configured to determine whether proximity of the object to the input panel is detected for the second input frame, based on the third representation, if the first and second representations are not similar.

Claims

1. Apparatus for detecting proximity of an object, the apparatus comprising:

an input panel comprising at least one detection element; and

at least one circuit configured to;

determine, from a first input frame in which input is received via the at least one detection element, a first representation of possible proximity of the object to the input panel;

determine, from a second input frame in which input is received via the at least one detection element, the second input frame being generated after the first input frame, a second representation of possible proximity of the object to the input panel;

determine, from a third input frame in which input is received via the at least one detection element, the third input frame being generated after the second input frame, a third representation of possible proximity of the object to the input panel; and

determine whether proximity of the object to the input panel is detected for the second input frame, at least in part by;

if the first and second representations are not similar, determining whether proximity of the object to the input panel is detected for the second input frame based at least in part on whether the second and third representations are similar;

wherein the at least one circuit is configured to determine whether proximity of the object to the input panel is detected for the second input frame at least in part by;

determining that the first and second representations are not similar when the second representation comprises an indication of a first position of a detection of possible proximity of the object to the input panel for the second input frame and the first representation does not indicate a detection of possible proximity of the object to the input panel for the first input frame at a position similar to the first position; and

if the third representation does not indicate a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position, determining that proximity of the object to the input panel is not detected for the second input frame.

2. The apparatus of claim 1, wherein the at least one circuit is further configured to:

determine whether proximity of the object to the input panel is detected for the second input frame, based at least in part on the first and second representations, if the first and second representations are similar.

3. The apparatus of claim 1, wherein each of the first, second and third representations comprises, for the respective input frame:

an indication of whether possible proximity of the object to the input panel is detected; and

if possible proximity of the object to the input panel is detected, an indication of a position of the detection of possible proximity of the object to the input panel.

4. The apparatus of claim 1, wherein the at least one circuit is configured to determine at least one of the first, second and third representations based at least in part on at least one light-receiving element of the input panel receiving reflected light above a threshold amount.

5. The apparatus of claim 1, wherein the at least one circuit is configured to determine at least one of the first, second and third representations based at least in part on at least one electrical contact made by compression of a portion of the input panel.

6. The apparatus of claim 1, wherein the at least one circuit is configured to determine at least one of the first, second and third representations based at least in part on a change in capacitance of at least one capacitive element of the input panel.

7. The apparatus of claim 1, wherein:

each of the first and second representations comprises, for the respective input frame, an indication of a position of a detection of possible proximity of the object to the input panel; and

the at least one circuit is configured to determine whether the first and second representations are similar at least in part by comparing the position indication of the first representation and the position indication of the second representation.

8. The apparatus of claim 7, wherein the at least one circuit is further configured to determine whether the first and second representations are similar at least in part by:

computing a difference between the position indications of the first and second representations; and

comparing the computed difference to a threshold amount.

9. The apparatus of claim 8, wherein the at least one circuit is further configured to determine whether the first and second representations are similar at least in part by:

if the computed difference is higher than the threshold amount, determining that the first and second representations are not similar; and

if the computed difference is not higher than the threshold amount, determining that the first and second representations are similar.

10. The apparatus of claim 7, wherein:

each of the first and second representations further comprises at least one of an area indication, a density indication and an aspect ratio indication for the respective detection of possible proximity of the object to the input panel; and

the at least one circuit is further configured to determine whether the first and second representations are similar at least in part by comparing the at least one indication of the first representation and the at least one indication of the second representation.

11. The apparatus of claim 10, wherein the at least one circuit is further configured to determine whether the first and second representations are similar at least in part by:

computing at least one difference between the at least one indication of the first representation and the at least one indication of the second representation;

computing a combination of the at least one difference and a difference between the position indications of the first and second representations; and

comparing the computed combination to a threshold amount.

12. The apparatus of claim 11, wherein the at least one circuit is further configured to determine whether the first and second representations are similar at least in part by:

if the computed combination is higher than the threshold amount, determining that the first and second representations are not similar; and

if the computed combination is not higher than the threshold amount, determining that the first and second representations are similar.

13. The apparatus of claim 1, wherein the at least one circuit is configured to determine at least one of the first, second and third representations at least in part by:

identifying a region in the respective input frame corresponding to one or more detection signals received from the input panel;

determining at least one of an area measure, a density measure and an aspect ratio measure for the identified region; and

comparing the at least one measure to at least one predetermined range to determine whether possible proximity of the object to the input panel is detected at a position corresponding to the identified region.

14. The apparatus of claim 1, wherein the at least one circuit is further configured to determine whether proximity of the object to the input panel is detected for the second input frame at least in part by:

determining that the first and second representations are not similar when the first representation comprises an indication of a first position of a detection of possible proximity of the object to the input panel for the first input frame and the second representation does not indicate a detection of possible proximity of the object to the input panel for the second input frame at a position similar to the first position; and

if the third representation indicates a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position, determining that proximity of the object to the input panel is detected for the second input frame.

15. The apparatus of claim 1, wherein the at least one circuit is further configured to determine whether proximity of the object to the input panel is detected for the second input frame at least in part by, if the third representation indicates a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position:

determining that proximity of the object to the input panel is detected for the second input frame.

16. The apparatus of claim 15, wherein the at least one circuit is further configured to, if it is determined that proximity of the object to the input panel is detected for the second input frame:

control a display image associated with the second input frame based at least in part on the indication of the first position.

17. A method for detecting proximity of an object to an input panel, the method comprising:

determining, from a first input frame in which input is received via the input panel, a first representation of possible proximity of the object to the input panel;

determining, from a second input frame in which input is received via the input panel, the second input frame being generated after the first input frame, a second representation of possible proximity of the object to the input panel;

determining, from a third input frame in which input is received via the input panel, the third input frame being generated after the second input frame, a third representation of possible proximity of the object to the input panel; and

determining, using at least one circuit, whether proximity of the object to the input panel is detected for the second input frame, at least in part by;

if the first and second representations are not similar, determining whether proximity of the object to the input panel is detected for the second input frame based at least in part on whether the second and third representations are similar;

wherein determining whether proximity of the object to the input panel is detected for the second input frame comprises;

determining that the first and second representations are not similar when the second representation comprises an indication of a first position of a detection of possible proximity of the object to the input panel for the second input frame and the first representation does not indicate a detection of possible proximity of the object to the input panel for the first input frame at a position similar to the first position; and

if the third representation does not indicate a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position, determining that proximity of the object to the input panel is not detected for the second input frame.

18. The method of claim 17, further comprising:

determining whether proximity of the object to the input panel is detected for the second input frame, based at least in part on the first and second representations, if the first and second representations are similar.

19. The method of claim 17, wherein each of the first, second and third representations comprises, for the respective input frame:

an indication of whether possible proximity of the object to the input panel is detected; and

if possible proximity of the object to the input panel is detected, an indication of a position of the detection of possible proximity of the object to the input panel.

20. The method of claim 17, wherein at least one of the first, second and third representations is determined based at least in part on at least one light-receiving element of the input panel receiving reflected light above a threshold amount.

21. The method of claim 17, wherein at least one of the first, second and third representations is determined based at least in part on at least one electrical contact made by compression of a portion of the input panel.

22. The method of claim 17, wherein at least one of the first, second and third representations is determined based at least in part on a change in capacitance of at least one capacitive element of the input panel.

23. The method of claim 17, wherein:

each of the first and second representations comprises, for the respective input frame, an indication of a position of a detection of possible proximity of the object to the input panel; and

the method further comprises determining whether the first and second representations are similar, at least in part by comparing the position indication of the first representation and the position indication of the second representation.

24. The method of claim 23, wherein determining whether the first and second representations are similar comprises:

computing a difference between the position indications of the first and second representations; and

comparing the computed difference to a threshold amount.

25. The method of claim 24, wherein determining whether the first and second representations are similar further comprises:

if the computed difference is higher than the threshold amount, determining that the first and second representations are not similar; and

if the computed difference is not higher than the threshold amount, determining that the first and second representations are similar.

26. The method of claim 23, wherein:

each of the first and second representations further comprises at least one of an area indication, a density indication and an aspect ratio indication for the respective detection of possible proximity of the object to the input panel; and

determining whether the first and second representations are similar further comprises comparing the at least one indication of the first representation and the at least one indication of the second representation.

27. The method of claim 26, wherein determining whether the first and second representations are similar comprises:

computing at least one difference between the at least one indication of the first representation and the at least one indication of the second representation;

computing a combination of the at least one difference and a difference between the position indications of the first and second representations; and

comparing the computed combination to a threshold amount.

28. The method of claim 27, wherein determining whether the first and second representations are similar further comprises:

if the computed combination is higher than the threshold amount, determining that the first and second representations are not similar; and

if the computed combination is not higher than the threshold amount, determining that the first and second representations are similar.

29. The method of claim 17, wherein determining at least one of the first, second and third representations comprises:

identifying a region in the respective input frame corresponding to one or more detection signals received from one or more detection elements of the input panel;

determining at least one of an area measure, a density measure and an aspect ratio measure for the identified region; and

comparing the at least one measure to at least one predetermined range to determine whether possible proximity of the object to the input panel is detected at a position corresponding to the identified region.

30. The method of claim 17, wherein determining whether proximity of the object to the input panel is detected for the second input frame comprises:

determining that the first and second representations are not similar when the first representation comprises an indication of a first position of a detection of possible proximity of the object to the input panel for the first input frame and the second representation does not indicate a detection of possible proximity of the object to the input panel for the second input frame at a position similar to the first position; and

if the third representation indicates a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position, determining that proximity of the object to the input panel is detected for the second input frame.

31. The method of claim 17, wherein determining whether proximity of the object to the input panel is detected for the second input frame further comprises, if the third representation indicates a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position:

determining that proximity of the object to the input panel is detected for the second input frame.

32. The method of claim 31, further comprising, if it is determined that proximity of the object to the input panel is detected for the second input frame:

controlling a display image associated with the second input frame based at least in part on the indication of the first position.

33. At least one non-transitory computer-readable storage medium encoded with a plurality of computer-executable instructions that, when executed, perform a method for detecting proximity of an object to an input panel, the method comprising:

determining, from a first input frame in which input is received via the input panel, a first representation of possible proximity of the object to the input panel;

determining, from a second input frame in which input is received via the input panel, the second input frame being generated after the first input frame, a second representation of possible proximity of the object to the input panel;

determining, from a third input frame in which input is received via the input panel, the third input frame being generated after the second input frame, a third representation of possible proximity of the object to the input panel; and

determining whether proximity of the object to the input panel is detected for the second input frame, at least in part by;

if the first and second representations are not similar, determining whether proximity of the object to the input panel is detected for the second input frame based at least in part on whether the second and third representations are similar;

wherein determining whether proximity of the object to the input panel is detected for the second input frame comprises;

determining that the first and second representations are not similar when the second representation comprises an indication of a first position of a detection of possible proximity of the object to the input panel for the second input frame and the first representation does not indicate a detection of possible proximity of the object to the input panel for the first input frame at a position similar to the first position; and

if the third representation does not indicate a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position, determining that proximity of the object to the input panel is not detected for the second input frame.

34. Apparatus for detecting proximity of an object, the apparatus comprising:

an input panel comprising at least one detection element; and

at least one circuit configured to;

determine, from a first input frame in which input is received via the at least one detection element, a first representation of possible proximity of the object to the input panel;

determine, from a second input frame in which input is received via the at least one detection element, the second input frame being generated after the first input frame, a second representation of possible proximity of the object to the input panel;

determine, from a third input frame in which input is received via the at least one detection element, the third input frame being generated after the second input frame, a third representation of possible proximity of the object to the input panel; and

determine whether proximity of the object to the input panel is detected for the second input frame, at least in part by;

if the first and second representations are not similar, determining whether proximity of the object to the input panel is detected for the second input frame based at least in part on whether the second and third representations are similar;

wherein the at least one circuit is configured to determine whether proximity of the object to the input panel is detected for the second input frame at least in part by;

determining that the first and second representations are not similar when the first representation comprises an indication of a first position of a detection of possible proximity of the object to the input panel for the first input frame and the second representation does not indicate a detection of possible proximity of the object to the input panel for the second input frame at a position similar to the first position; and

if the third representation indicates a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position, determining that proximity of the object to the input panel is detected for the second input frame.

35. A method for detecting proximity of an object to an input panel, the method comprising:

determining, from a first input frame in which input is received via the input panel, a first representation of possible proximity of the object to the input panel;

determining, from a second input frame in which input is received via the input panel, the second input frame being generated after the first input frame, a second representation of possible proximity of the object to the input panel;

determining, from a third input frame in which input is received via the input panel, the third input frame being generated after the second input frame, a third representation of possible proximity of the object to the input panel; and

determining, using at least one circuit, whether proximity of the object to the input panel is detected for the second input frame, at least in part by;

if the first and second representations are not similar, determining whether proximity of the object to the input panel is detected for the second input frame based at least in part on whether the second and third representations are similar;

wherein determining whether proximity of the object to the input panel is detected for the second input frame comprises;

determining that the first and second representations are not similar when the first representation comprises an indication of a first position of a detection of possible proximity of the object to the input panel for the first input frame and the second representation does not indicate a detection of possible proximity of the object to the input panel for the second input frame at a position similar to the first position; and

if the third representation indicates a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position, determining that proximity of the object to the input panel is detected for the second input frame.

36. At least one non-transitory computer-readable storage medium encoded with a plurality of computer-executable instructions that, when executed, perform a method for detecting proximity of an object to an input panel, the method comprising:

determining, from a first input frame in which input is received via the input panel, a first representation of possible proximity of the object to the input panel;

determining, from a second input frame in which input is received via the input panel, the second input frame being generated after the first input frame, a second representation of possible proximity of the object to the input panel;

determining, from a third input frame in which input is received via the input panel, the third input frame being generated after the second input frame, a third representation of possible proximity of the object to the input panel; and

determining whether proximity of the object to the input panel is detected for the second input frame, at least in part by;

if the first and second representations are not similar, determining whether proximity of the object to the input panel is detected for the second input frame based at least in part on whether the second and third representations are similar;

wherein determining whether proximity of the object to the input panel is detected for the second input frame comprises;

determining that the first and second representations are not similar when the first representation comprises an indication of a first position of a detection of possible proximity of the object to the input panel for the first input frame and the second representation does not indicate a detection of possible proximity of the object to the input panel for the second input frame at a position similar to the first position; and

if the third representation indicates a detection of possible proximity of the object to the input panel for the third input frame at a position similar to the first position, determining that proximity of the object to the input panel is detected for the second input frame.