Method for analyzing two-dimensional track to generate at least one non-linear index and touch control module using the same

• US 8,723,819 B2
• Filed: 09/27/2010
• Issued: 05/13/2014
• Est. Priority Date: 09/27/2010
• Status: Active Grant

• Current Assignee: Sentelic Corporation
• Original Assignee: Sentelic Corporation
• Inventors: Lin, Jao-Ching, Lee, Wen-Ting, Shen, Chung-Yi
• Primary Examiner(s): DINH, DUC Q
• Application Number:
  US12/891,382
• Publication Number:
  US 20120075203A1
• Time in Patent Office: 1,324 Days
• Field of Search: 345156-158, 345173-181, 345684-688
• US Class Current: 345/173
• 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 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A method for analyzing a two-dimensional track to generate at least one non-linear index and a touch control module using the same are provided. The method includes: extracting a two-dimensional track; generating a plurality of displacement units in sequence according to the two-dimensional track, in which each displacement unit includes a displacement amount and a displacement direction of the two-dimensional track moving in a preset time interval; comparing the displacement amount of each displacement unit with a reference value in sequence; calculating an included angle formed between the displacement direction of the displacement unit and a displacement direction of a previous displacement unit, when the displacement amount of the displacement unit is greater than the reference value; accumulating the included angles in sequence to obtain an accumulated angle, in which the accumulated angle includes an accumulated value and a positive or negative sign; and converting the accumulated angle to at least one non-linear index.

Claims

1. A method for analyzing a two-dimensional track to generate at least one non-linear index, comprising:

A1;

extracting a two-dimensional track, wherein the two-dimensional track is a two-dimensional coordinate position sequenced along with time;

A2;

generating a plurality of displacement units in sequence according to the two-dimensional track, wherein each displacement unit comprises a displacement amount and a displacement direction of the two-dimensional track moving in a preset time interval;

A3;

comparing the displacement amount of each displacement unit with a reference value in sequence; and

calculating an included angle formed between the displacement direction of the displacement unit and a displacement direction of a previous displacement unit, when the displacement amount of the displacement unit is greater than the reference value;

A4;

accumulating the included angles in sequence to obtain an accumulated angle, wherein the accumulated angle comprises an accumulated value and a positive or negative sign; and

A5;

converting the accumulated angle to at least one non-linear index.

2. The method according to claim 1, wherein in Step A5, when the accumulated value exceeds a threshold value, the accumulated angle is converted to the non-linear index according to the positive or negative sign.

3. The method according to claim 1, wherein in Step A5, the accumulated angle is converted to the non-linear index through a formula.

4. The method according to claim 1, wherein the two-dimensional track is at least a part of a sliding track of an object on a contact sensing surface.

5. The method according to claim 4, wherein one point on the contact sensing surface is used as an origin point of two-dimensional coordinates.

6. The method according to claim 4, wherein in Step A1, when the object first contacts with the contact sensing surface for a first time, the two-dimensional track is started to be extracted.

7. The method according to claim 4, wherein in Step A1, the two-dimensional track is extracted in any segment of a sliding time interval during the sliding track.

8. A touch control module, comprising:

a sensing surface, having a plurality of proximity sensors distributed on a surface, for sensing contact of at least one object on the sensing surface; and

a controller, electrically connected to the plurality of proximity sensors, for determining a plurality of groups of first displacements and second displacements of each object sliding on the sensing surface, calculating an included angle between the second displacement and the first displacement of each group, accumulating the included angles to obtain an accumulated angle, and outputting at least one non-linear index according to the accumulated angle;

wherein the first displacement of each group is a difference between positions of the object contacting with the sensing surface at two time points, the second displacement of each group is a difference between positions of the object contacting with the sensing surface at another two time points, and the time points of the second displacement are later than the time points of the first displacement, and wherein the second displacement of each group is determined after the first displacement, and the accumulated angle comprises an accumulated value and a positive or negative sign.

9. A touch control module, comprising:

a sensing surface, having a plurality of proximity sensors distributed on a surface, for sensing contact of at least one object on the sensing surface; and

a controller, electrically connected to the plurality of proximity sensors, for determining a plurality of groups of first displacements and second displacements of each object sliding on the sensing surface, calculating an included angle between the second displacement and the first displacement of each group, accumulating the included angles to obtain an accumulated angle, and outputting at least one non-linear index according to the accumulated angle;

wherein the second displacement of each group is determined after the first displacement, and the accumulated angle comprises an accumulated value and a positive or negative sign and the time points of the second displacement are later than the time points of the first displacement;

wherein an amount of objects contacting with the sensing surface is greater than 1;

the first displacement of each group is a difference between center positions of the plurality of objects contacting with the sensing surface at two time points and the second displacement of each group is a difference between center positions of the plurality of objects contacting with the sensing surface at another two time points, or the first displacement of each group is a difference between left edge positions of the plurality of objects contacting with the sensing surface at two time points and the second displacement of each group is a difference between left edge positions of the plurality of objects contacting with the sensing surface at another two time points, or the first displacement of each group is a difference between right edge positions of the plurality of objects contacting with the sensing surface at two time points, the second displacement of each group is a difference between right edge positions of the plurality of objects contacting with the sensing surface at another two time points.