Single-Finger and Multi-Touch Gesture Determination Method, Touch Control Chip, Touch Control System and Computer System

• US 20120223895A1
• Filed: 08/01/2011
• Published: 09/06/2012
• Est. Priority Date: 03/04/2011
• Status: Abandoned Application

• Current Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Original Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Inventors: Lu, Yu-Tsung, Lin, Ching-Chun, Tsai, Jiun-Jie, Chang, Tsen-Wei, Lin, Ting-Wei, Huang, Hao-Jan, Hung, Ching-Ho
• Application Number:
  US13/195,018
• Publication Number:
  US 20120223895A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• 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
• CPC Class Codes: G06F 3/0444 using a single conductive element covering the whole sensing surface, e.g. by sensing the electrical current flowing at the corners
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures

Abstract

A single-finger and multi-touch gesture determination method is disclosed. The single touch and multi-touch gesture determination method includes steps of: for each of one or more touch points, judging a respective category under a first group to which the touch point belongs, according to an initial position of the touch point; for each of the one or more touch points, judging a respective category under a second group to which the touch point belongs, according to a moving pattern of the touch point, wherein the moving pattern is respectively defined in the judged category under the first group to which the touch point belongs; and determining a gesture represented by the one or more touch points according to the judged categories under the second group respectively to which the one or more touch points belong.

Claims

1. A single-finger and multi-touch gesture determination method, comprising:

for each of one or more touch points, judging a respective category under a first group to which the touch point belongs, according to an initial position of the touch point;

for each of the one or more touch points, judging a respective category under a second group to which the touch point belongs, according to a moving pattern of the touch point, wherein the moving pattern is respectively defined in the judged category under the first group to which the touch point belongs; and

determining a gesture represented by the one or more touch points according to the judged categories under the second group respectively to which the one or more touch points belong.

2. The single-finger and multi-touch gesture determination method of claim 1, wherein a plurality of categories under the second group respectively correspond to a plurality of gestures, and the determined gesture is a gesture corresponding to a category under the second group to which most of the touch points belong.

3. The single-finger and multi-touch gesture determination method of claim 1, wherein the step of determining the respective category under the first group to which each of the one or more touch points belongs comprises a step of:

for each of the one or more touch points, determining the respective category under the first group to which the touch point belongs, according to relative distances between the initial position of the touch point and one or more reference positions.

4. The single-finger and multi-touch gesture determination method of claim 3, wherein the one or more reference positions are four corners of a touch sensing device, a center of the four corners or a gravity center of the one or more touch points.

5. The single-finger and multi-touch gesture determination method of claim 3, wherein the step of determining the respective category under the first group to which the one or more touch points belong further comprises a step of:

equally distributing the one or more touch points to the plurality of categories under the first group.

6. The single-finger and multi-touch gesture determination method of claim 1, wherein the moving pattern of each category under the first group is defined by one or more moving pattern parameters, which comprise at least one of a direction parameter, a distance parameter and a time parameter.

7. The single-finger and multi-touch gesture determination method of claim 6, wherein the direction parameter indicates one of a plurality of moving directions respectively corresponding to a plurality of categories under the second group, and the step of judging the respective categories under the second group to which the one or more touch points belong comprises a step of:

determining that the one or more touch points respectively belong to a category corresponding to the moving direction indicated by the direction parameter.

8. The single-finger and multi-touch gesture determination method of claim 7, wherein first to fourth categories under the first group respectively correspond to first to fourth corners of a touch sensing device, and the plurality of directions under each of the first to fourth categories respectively comprise:

a direction towards an opposite corner of one of the four corners, a direction towards a corresponding corner of the first to the fourth corners, a direction towards an adjacent corner of one of the four corners, and a direction towards another adjacent corner of one of the four corners.

9. The single-finger and multi-touch gesture determination method of claim 8, wherein the step of judging the respective category under the second group to which the one or more touch points belong according to a moving pattern comprises steps of:

for each of the one or more touch points, respectively determining one or more probable categories under the second group to which the touch point may belong, according to the one or more moving pattern parameters, respectively; and

for the each touch point, selecting one of the one or more probable categories to which the touch point may belong as the category under the second group to which the touch point belongs according to priority orders of the one or more moving pattern parameters.

10. The single-finger and multi-touch gesture determination method of claim 9, wherein the step of judging the respective category under the second group to which the one or more touch points belong according to the moving pattern further comprises steps of:

determining whether the each touch point respectively represents a gesture or a non-gesture, according to at least one of the one or more moving pattern parameters, respectively; and

further determining whether the gesture corresponding to the selected category under the second group to which the touch point belongs is substantiated or not, according to the priority orders of the one or more moving pattern parameters.

11. A touch control chip, comprising:

a determining unit, for determining a respective category under a first group to which each of a plurality of touch points belongs, according to an initial position of the touch point, and for determining a respective category under a second group to which each of the plurality of the touch points belongs, according to a moving pattern respectively defined in the determined category under the first group to which the touch point belongs; and

a decision unit, for determining a gesture represented by the one or more touch points according to the respective determined categories under the second group to which the one or more touch points belong.

12. The touch control chip of claim 11, wherein a plurality of categories under the second group respectively correspond to a plurality of gestures, and the decision unit determines the gesture is a gesture corresponding to a category under the second group to which most of the touch points belong.

13. The touch control chip of claim 11, wherein the determining unit determines the respective category under the first group to which each of the one or more touch points belongs according to relative distances between the initial position of the touch point and one or more reference positions.

14. The touch control chip of claim 13, wherein the one or more reference positions are four corners of a touch sensing device, a center of the four corners or a gravity center of the one or more touch points.

15. The touch control chip of claim 13, wherein the determining unit equally distributes the one or more touch points to the plurality of categories under the first group.

16. The touch control chip of claim 11, wherein the moving pattern of each category under the first group is defined by one or more moving pattern parameters, and the one or more moving pattern parameters comprising at least one of a direction parameter, a distance parameter and a time parameter.

17. The touch control chip of claim 16, wherein the direction parameter indicates one of a plurality of moving directions, and the plurality of moving directions respectively correspond to a plurality of categories under the second group, and the determining unit determines that the one or more touch points respectively belong to a category corresponding to the moving direction indicated by the direction parameter.

18. The touch control chip of claim 17, wherein a first to a fourth category under the first group respectively correspond to a first to a fourth corner of a touch sensing device, and the plurality of directions under each of the first to the fourth category respectively comprises:

a direction towards an opposite corner of one of the four corners, a direction towards a corresponding corner of the first to the fourth corners, a direction towards an adjacent corner of one of the four corners, and a direction towards another adjacent corner of one of the four corners.

19. The touch control chip of claim 18, wherein for each of the one or more touch points, the determining unit respectively determines one or more probable categories under the second group to which the touch point may belong, according to the one or more moving pattern parameters, respectively, and for the each touch point, the determining unit selects one of the one or more probable categories to which the touch point may belong, as the category under the second group to which the touch point belongs, according to priority orders of the one or more moving pattern parameters.

20. The touch control chip of claim 19, the determining unit further determines whether the each touch point respectively represents a gesture or a non-gesture, according to at least one of the one or more moving pattern parameters, respectively, and further determines whether the gesture corresponding to the selected category under the second group to which the touch point belongs is substantiated or not, according to the priority orders of the one or more moving pattern parameters.

21. A touch control system, comprising:

a touch sensing device, for generating one or more signal values of one or more detecting signals; and

the touch control chip of claim 11, for determining one or more touch points and a gesture represented by the one or more touch points, according to the one or more signal values of the one or more detecting signals generated by the touch sensing device.

22. A computer system, comprising:

the touch control system of claim 21, for determining a gesture represented by one or more touch points; and

a host, for receiving a packet of the gesture from the touch control system.