Touch signal recognition apparatus and method and medium for the same

• US 20080170042A1
• Filed: 09/06/2007
• Published: 07/17/2008
• Est. Priority Date: 01/17/2007
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Chang, Wook, Lee, Hyun-jeong, Yoon, Soo-yeoun
• Application Number:
  US11/896,906
• Publication Number:
  US 20080170042A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/04186 Touch location disambiguation

Abstract

The present invention a touch signal recognition technology that is capable of filtering a touch signal due to an unintentional touch and effectively detecting a touch signal by an intentional touch to prevent the erroneous operation.

A touch signal recognition apparatus according to an exemplary embodiment of this invention includes a sensing unit sensing a touch signal having a predetermined movement trajectory; a strength recognizing unit recognizing a change in strength of the touch signal; an availability determining unit determining an availability of the touch signal on the basis of the recognized change of the strength; and a controller executing an instruction corresponding to the movement trajectory on the basis of the determined result.

Claims

1. A touch signal recognition apparatus comprising:

a sensor to sense a touch signal having a predetermined movement trajectory;

a strength recognizer to recognize a change in strength of the touch signal;

an availability determiner to determine an availability of the touch signal on the basis of the recognized change of the strength; and

a controller to execute an instruction corresponding to the movement trajectory on the basis of the determined availability.

2. The apparatus of claim 1, wherein when the starting point of the movement trajectory belongs to a touch signal sensing area that is a part of a display area, the controller recognizes the strengths of the touch signal to be classified into a plurality of levels.

3. The apparatus of claim 2, further comprising:

a display to display a screen including status information regarding the strength of the touch signal according to the plurality of levels.

4. The apparatus of claim 2, wherein the signal sensing area comprises an area on which a button or an icon is displayed.

5. The apparatus of claim 1, wherein

the strength recognizer calculates a strength change parameter that represents the change in strength of the touch signal, and

the strength change parameter is a ratio of a time when a strength is constant at a first threshold value to a total time when the touch signal is sensed.

6. The apparatus of claim 5, wherein if the ratio exceeds a second threshold value, the availability determiner determines that the sensed signal is valid.

7. The apparatus of claim 1, further comprising:

a movement trajectory recognizer to recognize the movement trajectory.

8. The apparatus of claim 7, wherein, if the recognized movement trajectory corresponds to a predetermined type, the availability determiner determines that the sensed signal is valid.

9. A touch signal recognition method comprising:

sensing a touch signal having a predetermined movement trajectory;

recognizing a change in strength of the touch signal;

determining an availability of the touch signal on the basis of the recognized change of the strength; and

executing an instruction corresponding to the movement trajectory on the basis of the determined availability.

10. The method of claim 9, wherein when the starting point of the movement trajectory belongs to a touch signal sensing area that is a part of a display area, the strengths of the touch signal are recognized to be classified into a plurality of levels.

11. The method of claim 10, further comprising:

displaying a screen including status information regarding the strength of the touch signal according to the plurality of levels.

12. The method of claim 10, wherein the signal sensing area comprises an area on which a button or an icon is displayed.

13. The method of claim 9, wherein:

the recognizing of change in strength of the touch signal comprises calculating a strength change parameter that represents the change in strength of the touch signal, and

the strength change parameter is a ratio of a time when a strength is constant at a first threshold value to a total time when the touch signal is sensed.

14. The method of claim 13, wherein the determining of the availability of the touch signal comprises, if the ratio exceeds a second threshold value, determining that the sensed signal is valid.

15. The method of claim 9, further comprising:

recognizing the movement trajectory.

16. The method of claim 15, wherein the determining of the availability of the touch signal comprises, if the recognized movement trajectory corresponds to a predetermined type, determining that the sensed signal is valid.

17. At least one computer readable medium storing computer readable instructions that control at least one processor to implement the method of claim 9.

18. A touch signal recognition apparatus comprising:

an availability determiner to determine an availability of a touch signal having a predetermined movement trajectory on the basis of a recognized change of strength of the touch signal; and

a controller to execute an instruction corresponding to the movement trajectory on the basis of the determined availability.

19. A touch signal recognition method comprising:

determining an availability of a touch signal having a movement trajectory on the basis of a recognized change of strength of the touch signal; and

executing an instruction corresponding to the movement trajectory on the basis of the determined availability.

20. At least one computer readable medium storing computer readable instructions that control at least one processor to implement the method of claim 19.