Touch panel and multi-points detecting method

• US 8,922,516 B2
• Filed: 03/27/2013
• Issued: 12/30/2014
• Est. Priority Date: 03/27/2013
• Status: Expired due to Fees

• Current Assignee: Tianjin Funayuanchuang Technology Co., Ltd.
• Original Assignee: Tianjin Funayuanchuang Technology Co., Ltd.
• Inventors: Huang, Chun-Lung, Cheng, Chien-Yung, Shih, Po-Sheng
• Primary Examiner(s): Lao, Lun-Yi
• Assistant Examiner(s): McLoone, Peter D
• Application Number:
  US13/851,742
• Publication Number:
  US 20140292667A1
• Time in Patent Office: 643 Days
• Field of Search: 345/173, 345/174, 345/179, 345/104, 178/18.01, 178/18.03, 178/18.05, 178/18.06, 178/18.09
• 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

Abstract

A multi-points detecting method includes proving a touch panel including a plurality of detecting areas including a first detecting area, a second detecting area and a third detecting area. A maximum detecting value of a detecting curve is located in the first detecting area. The first detecting area and the second detecting area are analyzed to obtain a relative distance between a first touch point coordinate and a second touch point coordinate. The touch panel is defined as being touched at the first touch point coordinate or a middle point between the first touch point coordinate and the second touch point coordinate, when the relative distance is less than a predetermined distance. The touch panel is defined as being touched at the first touch point coordinate and the second touch point coordinate, when the relative distance is greater than or equal to the predetermined distance.

Claims

1. A touch panel, comprising:

a plurality of detecting areas comprising a first detecting area, a second detecting area, and a third detecting area;

wherein the second detecting area is located on a first side of the first detecting area, and the third detecting area is located on a second side, opposite to the first side of the first detecting area;

a plurality of sensing units located in the plurality of detecting areas and oriented along a first axial direction;

a detecting unit capable of detecting the touch panel along a second axial direction to obtain a detecting curve, wherein a maximum detecting value of the detecting curve is located in the first detecting area, a first average detecting value of the detecting curve of the second detecting area is greater than a second average detecting value of the detecting curve of the third detecting area;

an analyzing unit capable of analyzing the first detecting area to obtain a first touch point coordinate, analyzing the second detecting area to obtain a second touch point coordinate, and analyzing a relative distance between the first touch point coordinate and the second touch point coordinate; and

a defining unit capable of defining the touch panel as being touched at the first touch point coordinate or a middle point between the first touch point coordinate and the second touch point coordinate, when the relative distance is less than a predetermined distance; and

the defining unit capable of defining the touch panel as being touched at the first touch point coordinate and the second touch point coordinate, when the relative distance is greater than or equal to the predetermined distance.

2. The touch panel of claim 1, wherein the plurality of sensing units is a plurality of carbon nanotubes, a plurality of stripe metal films, a plurality of stripe indium tin oxides or a plurality of indium zinc oxides.

3. The touch panel of claim 1, wherein each of the plurality of sensing units has lower impedance along the first axial direction, and has higher impedance along the second axial direction that is perpendicular to the first axial direction.

4. The touch panel of claim 1, wherein two adjacent detecting areas overlap in part.

5. The touch panel of claim 1, wherein the predetermined distance is in a range from about 0.5 centimetres to about 1.5 centimetres.

6. The touch panel of claim 1, wherein the first touch point coordinate and the second touch point coordinate are two-dimensional coordinates.

7. The touch panel of claim 1, wherein the plurality of sensing units is parallel to each other.

8. The touch panel of claim 1, further comprising a plurality of electrodes located on opposite two ends of the plurality of sensing units and electrically connected with the plurality of sensing units.

9. A multi-points detecting method, comprising steps of:

proving a touch panel comprising a plurality of detecting areas and a plurality of sensing units oriented along a first axial direction in the plurality of detecting areas, wherein the plurality of detecting areas comprises a first detecting area, a second detecting area, and a third detecting area; and

the second detecting area is located on a first side of the first detecting area, and the third detecting area is located on a second side opposite to the first side of the first detecting area;

detecting the touch panel along a second axial direction to obtain a detecting curve, wherein a maximum detecting value of the detecting curve is located in the first detecting area, a first average detecting value of the detecting curve of the second detecting area is greater than a second average detecting value of the detecting curve of the third detecting area;

analyzing the first detecting area to obtain a first touch point coordinate;

analyzing the second detecting area to obtain a second touch point coordinate;

analyzing the first touch point coordinate and the second touch point coordinate to obtain a relative distance between the first touch point coordinate and the second touch point coordinate;

defining the touch panel as being touched at the first touch point coordinate or a middle point between the first touch point coordinate and the second touch point coordinate, when the relative distance is less than a predetermined distance; and

defining the touch panel as being touched at the first touch point coordinate and the second touch point coordinate, when the relative distance is greater than or equal to the predetermined distance.

10. The method of claim 9, wherein the plurality of sensing units is a plurality of carbon nanotubes, a plurality of stripe metal films, a plurality of stripe indium tin oxides or a plurality of indium zinc oxides.

11. The method of claim 9, wherein each of the plurality of sensing units has a lower impedance along the first axial direction, and has a higher impedance along the second axial direction perpendicular to the first axial direction.

12. The method of claim 9, wherein two adjacent detecting areas overlap in part.

13. The method of claim 9, wherein the predetermined distance is in a range from about 0.5 centimetres to about 1.5 centimetres.

14. The method of claim 9, wherein the first touch point coordinate and the second touch point coordinate are two-dimensional coordinates.

15. The method of claim 9, wherein the plurality of sensing units is parallel to each other.

16. The method of claim 9, wherein the touch panel further comprises a detecting unit, an analyzing unit, and a defining unit.

17. The method of claim 16, wherein the detecting unit is used for detecting the touch panel along the second axial direction to obtain the detecting curve.

18. The method of claim 16, wherein the analyzing unit is used for analyzing the first detecting area to obtain the first touch point coordinate and analyzing the second detecting area to obtain the second touch point coordinate.

19. The method of claim 9, wherein the touch panel further comprises a plurality of electrodes located on opposite two ends of the plurality of sensing units and electrically connected with the plurality of sensing units.

20. The method of claim 19, wherein two adjacent electrodes and their opposite two adjacent electrodes define each of the plurality of detecting areas.