TOUCH SYSTEM WITH TRACK DETECTING FUNCTION AND METHOD THEREOF

• US 20130050100A1
• Filed: 11/14/2011
• Published: 02/28/2013
• Est. Priority Date: 08/30/2011
• Status: Active Grant

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: Lee, Yi-Fang, Lin, Yao-Hsuan
• Granted Patent: US 9,619,072 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184

Abstract

A touch system with track detecting function includes a touch pad for sequentially sensing a plurality of positions of an indication object at a plurality of moments in order to detect a track of the indication object on the touch pad, and a processor for continuously generating motion vectors according to the track of the indication object on the touch pad, for generating a candidate motion vector according to at least one motion vector, and for nonlinearly generating a target motion vector according to the candidate motion vector in order to move a target shown on a display panel. Each of the motion vectors represents a difference between a position of the indication object and a next position of the indication object.

Claims

1. A touch system with track detecting function, comprising:

a touch pad for sequentially sensing a plurality of positions of an indication object at a plurality of moments in order to detect a track of the indication object on the touch pad; and

a processor for continuously generating motion vectors according to the track of the indication object on the touch pad, for generating a candidate motion vector according to at least one motion vector, and for nonlinearly generating a target motion vector according to the candidate motion vector in order to move a target shown on a display panel;

wherein each of the motion vectors represents a difference between a position of the indication object and a next position of the indication object.

2. The touch system of claim 1, wherein the candidate motion vector is a sum of a plurality of motion vectors.

3. The touch system of claim 1, wherein the candidate motion vector is related to the target motion vector with a function, and the function is a nonlinear function.

4. The touch system of claim 1, wherein when the candidate motion vector is smaller than a predetermined value, the processor determines the indication object stopped moving, and continuously moves the target along a direction of the candidate motion vector.

5. The touch system of claim 4, wherein the processor moves the target at a predetermined speed, and when the candidate motion vector gets larger, the predetermined speed gets higher;

when the candidate motion vector gets smaller, the predetermined speed gets lower.

6. The touch system of claim 1 further comprising a touch sensor for determining whether the indication object is still on the touch pad.

7. The touch system of claim 6, wherein when the touch sensor determines the indication object not on the touch pad, the processor moves the target according to the target motion vector, and then moves the target in a predetermined time.

8. The touch system of claim 6, wherein when the touch sensor determines the indication object not on the touch pad, the processor moves the target according to the target motion vector, and then moves the target with a decreasing speed from an original speed when moving the target.

9. The touch system of claim 1, wherein when the indication object is not on the touch pad, the processor moves the target according to the target motion vector, and then moves the target in a predetermined time.

10. The touch system of claim 1, wherein when the indication object is not on the touch pad, the processor moves the target according to the target motion vector, and then moves the target with a decreasing speed from an original speed when moving the target.

11. A method for controlling a touch system, comprising:

sensing a track of an indication object;

continuously generating motion vectors according to the track of the indication object;

generating a candidate motion vector according to at least one motion vector, and nonlinearly generating a target motion vector according to the candidate motion vector; and

moving a target shown on a display panel according to the target motion vector;

wherein each of the motion vectors represents a difference between a position of the indication object and a next position of the indication object, and the indication object is on a touch pad of the touch system.

12. The method of claim 11, wherein generating the candidate motion vector according to at least one motion vector, comprises:

summing up a plurality of motion vectors for generating the candidate motion vector.

13. The method of claim 11, wherein nonlinearly generating the target motion vector according to the candidate motion vector, comprises:

converting the candidate motion vector to the target motion vector according to a nonlinear function.

14. The method of claim 11, further comprising:

when the candidate motion vector is smaller than a predetermined value, determining the indication object stopped moving, and moving the target along a direction of the candidate motion vector.

15. The method of claim 14, wherein when the candidate motion vector is smaller than the predetermined value, determining the indication object stopped moving, and moving the target along the direction of the candidate motion vector comprises:

when the candidate motion vector is smaller than the predetermined value, continuously moving the target along the direction of the candidate motion vector at a predetermined speed;

wherein when the candidate motion vector gets larger, the predetermined speed gets higher;

when the candidate motion vector gets smaller, the predetermined speed gets lower.

16. The method of claim 11, further comprising determining whether the indication object is still on the touch pad.

17. The method of claim 16, wherein determining whether the indication object is still on the touch pad comprises:

when determining the indication object not on the touch pad, moving the target according to the target motion vector, and then moving the target in a predetermined time.

18. The method of claim 16, wherein determining whether the indication object is still on the touch pad comprises:

when determining the indication object not on the touch pad, moving the target according to the target motion vector, and then moving the target with a decreasing speed from an original speed when moving the target.