METHOD OF IDENTIFYING A MULTI-TOUCH SHIFTING GESTURE AND DEVICE USING THE SAME

• US 20120249487A1
• Filed: 02/29/2012
• Published: 10/04/2012
• Est. Priority Date: 03/31/2011
• Status: Abandoned Application

• Current Assignee: BYD Company Limited
• Original Assignee: BYD Company Limited
• Inventors: Cai, Tiejun, Yi, Lianfang, He, Bangjun, Yang, Yun, Chen, Guilan
• Application Number:
  US13/409,060
• Publication Number:
  US 20120249487A1
• Time in Patent Office: Days
• US Class Current: 345/177
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• 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 3/0446 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 of identifying a shifting gesture comprises detecting one or more induction signals induced by one or more pointing objects that come into contact with a touch-sensitive surface, determining the number of the pointing objects that come into contact with the touch-sensitive surface, recording moving status and coordinates of each pointing object in an instance in which the number of the pointing objects is larger than a preset number, determining whether one pointing object moves in a direction parallel to the direction that another pointing object moves in according to the recorded moving status and the coordinates of the pointing objects and generating control signals to execute a gesture associated with the determined result.

Claims

1. A method of identifying a shifting gesture comprising:

detecting one or more induction signals induced by one or more pointing objects that come into contact with a touch-sensitive surface;

determining the number of the pointing objects that come into contact with the touch-sensitive surface;

recording moving status and coordinates of each pointing object in an instance in which the number of the pointing objects is larger than a preset number;

determining whether one pointing object moves in a direction parallel to the direction that another pointing object moves in according to the recorded moving status and the coordinates of the pointing objects; and

generating control signals to execute a gesture associated with the determined result.

2. The method of claim 1, wherein determining the number of pointing objects comprises:

selecting a first point and a second point of each detected induction signal, the second point preceding the first point;

comparing values of the two selected points to a reference signal to determine a rising wave or a falling wave; and

determining the number of rising waves and/or falling waves to determine the number of pointing objects.

3. The method of claim 2, wherein comparing values comprises:

comparing a first value of the first point to the reference signal;

comparing a second value of the second point to the reference signal; and

determining a rising wave or a falling wave according to the comparison results.

4. The method of claim 3 further comprising:

identifying one or more rising points on the rising wave intercepted by the reference signal;

identifying one or more drop points on the falling wave intercepted by the reference signal; and

comparing a distance between a rising point and a subsequent drop point to a predetermined threshold value or comparing a distance between a drop point and a subsequent rising point to a predetermined threshold value to determine if the detected induction signal is induced by a valid contact.

5. The method of claim 4, further comprising:

detecting a first induction signal in a first direction; and

detecting a second induction signal in a second direction, wherein the first direction and the second direction have an angle therebetween.

6. The method of claim 4, furthering comprising:

determining the number of the pointing objects according to the number of rising waves or falling waves of the first induction signal or the second induction signal.

7. The method of claim 1, further comprising:

obtaining time interval during which each pointing object remains in contact with the touch-sensitive surface, displacement that each pointing object moves from a start point to an end point on the touch-sensitive surface during the time interval;

triggering a preset function based on the time interval and the displacement of each pointing object; and

determining control parameters of the preset function according to the coordinates of each pointing object.

8. The method of claim 1, further comprising:

determine an angle between a line connecting a start point and an end point of each pointing object and a reference; and

determining if one pointing object moves in a direction parallel to the direction that another pointing object moves according to the angle.

9. A device of identifying a shifting gesture comprising:

a detecting module, configured to detect one or more induction signals induced by one or more pointing objects that come into contact with a touch-sensitive surface;

a determination module, configured to determine the number of pointing objects;

a recording module, configured to record moving status and coordinates of each pointing object if the number of the pointing objects is larger than a preset number; and

a processing module, configured to;

determine if one pointing object moves in a direction parallel to the direction that another pointing object moves according to the moving status and coordinates of each pointing object; and

generate control signals to execute a gesture associated with the determined result.

10. The device of claim 9, wherein the determination module comprises:

a calculating unit, configured to compare values of selected points of the detected induction signal to a reference signal to determine the number of rising waves and the number of falling waves; and

a number determining unit, configured to determine the number of pointing objects that generate the induction signals according to the number of the rising waves and the falling waves.

11. The device of claim 10, wherein the calculating unit further configured to:

select a first point and a second point of each detected induction signal, the second point preceding the first point;

compare values of the two selected points to the reference signal to determine a rising wave or a falling wave; and

determine the number of rising waves and/or falling waves to determine the number of pointing objects.

12. The device of claim 9, further comprising:

a function triggering module, configured to trigger a preset function based on time interval during which each pointing object remains in contact with the touch-sensitive surface, displacement that each pointing object moves from a start point to an end point on the touch-sensitive surface during the time interval; and

a parameter setting module, configured to determine control parameters of the preset function according to the coordinates of each pointing object.

13. The device of claim 9, wherein the processing module comprises:

an angle determining unit, configured to determine an angle between a line connecting a start point and an end point of each pointing object and a reference; and

a direction determining unit, configured to determine if one pointing object moves in a direction parallel to the direction that another pointing object moves according to the angle.

14. The device of claim 9, wherein the detecting module comprises:

a transmitting transducer, configured to receive a first electrical signal from the processing module, convert the received first electrical signal into an acoustic signal and emit the acoustic signal to a reflector; and

a receiving transducer, configured to receive the acoustic signal from the reflector, convert the acoustic signal into a second electrical signal and send the second electrical signal to the processing module.