Touch panel input device and gesture detecting method

• US 8,730,205 B2
• Filed: 09/15/2011
• Issued: 05/20/2014
• Est. Priority Date: 10/15/2010
• Status: Active Grant

• Current Assignee: Touch Panel Systems KK (TE Connectivity Ltd. (United Kingdom))
• Original Assignee: Elo Touch Solutions, Inc.
• Inventors: Tsumura, Masahiro, Okunishi, Tetsuya
• Primary Examiner(s): OLSON, JASON C
• Application Number:
  US13/233,816
• Publication Number:
  US 20120092289A1
• Time in Patent Office: 978 Days
• Field of Search: None
• US Class Current: 345/174
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

Detection of complex input by two touched points are enabled to be detected by a resistive film type touch panel input device equipped with two resistive films facing each other with a minute gap therebetween; a first electrode pair; a second electrode pair extending in directions perpendicular to the first electrode pair; means for applying voltages between the first electrode pair and between the second electrode pair; means for measuring the voltage which is divided at two touch points with respect to the first electrode pair and the second electrode pair, when the resistive films are caused to contact each other by being touched at two points; means for measuring currents that flow between the first electrode pair and between the second electrode pairs when the touch occurs; and discriminating means, for discriminating the trajectories of the two touch points based on the values of the measured voltages and currents.

Claims

1. A touch panel input device, comprising:

two resistive films which are arranged to face each other with a minute gap therebetween;

a first electrode pair formed by electrodes provided at the edges of one of the resistive films that face each other;

a second electrode pair formed by electrodes provided at the edges of the other one of the resistive films that face each other and extend in directions perpendicular to the first electrode pair; and

circuitry configured to;

apply voltages between the first electrode pair and between the second electrode pair;

measure divided voltages which are divided at two touch points with respect to the first electrode pair and the second electrode pair when the resistive films are caused to contact each other by being touched at the two touch points;

measure currents that flow between the first electrode pair and between the second electrode pair when the touch occurs, wherein the currents indicate distance between the two touch points; and

discriminate trajectories of the two touch points based on the values of the measured divided voltages and currents.

2. A touch panel input device as defined in claim 1, wherein the circuitry is configured to discriminate the trajectories based on the direction of change of the divided voltages and the currents.

3. A touch panel input device as defined in claim 1, wherein the circuitry is configured to discriminate the trajectories based on the amount of change of the divided voltages and the currents per unit time.

4. A touch panel input device as defined in claim 2, wherein the circuitry is configured to discriminate the trajectories based on the amount of change of the divided voltages and the currents per unit time.

5. A touch panel input device as defined in claim 1, wherein the circuitry is configured to measure the divided voltages and the currents during different periods of time.

6. A touch panel input device as defined in claim 2, wherein the circuitry is configured to measure the divided voltages and the currents during different periods of time.

7. A touch panel input device as defined in claim 3, wherein the circuitry is configured o measure the divided voltages and the currents during different periods of time.

8. A touch panel input device as defined in claim 4, wherein the circuitry is configured to measure the divided voltages and the currents during different periods of time.

16. A touch panel input device as defined in claim 1, wherein the divided voltages indicate a midpoint of the two touch points.

17. A touch panel input device as defined in claim 16, wherein:

the divided voltages indicate the midpoint of the two touch points in an X direction and a Y direction; and

the currents indicate the distance between the two touch points in the X direction and the Y direction.

9. A gesture detecting method for a touch panel input device equipped with two resistive films which are arranged to face each other with a minute gap therebetween, a first electrode pair formed by electrodes provided at the edges of one of the resistive films that face each other, and a second electrode pair formed by electrodes provided at the edges of the other one of the resistive films that face each other and extend in directions perpendicular to the first electrode pair, comprising:

applying voltages between the first electrode pair and the second electrode pair;

measuring divided voltages which are divided at two touch points with respect to the first electrode pair and the second electrode pair and currents that flow between the first electrode pair and between the second electrode pairs when the resistive films are caused to contact each other by being touched at the two touch points, wherein the currents indicate distance between the two touch points; and

discriminating the trajectories of the two touch points based on the values of the measured divided voltages and currents.

10. A gesture detecting method as defined in claim 9, wherein the trajectories are discriminated based on the direction of change of the divided voltages and the currents.

11. A gesture detecting method as defined in claim 10, wherein the trajectories are discriminated based on the amount of change of the divided voltages and the currents per unit time.

12. A gesture detecting method as defined in claim 9, wherein the divided voltages and the currents are measured during different periods of time.

13. A gesture detecting method as defined in claim 10, wherein the divided voltages and the currents are measured during different periods of time.

14. A gesture detecting method as defined in claim 11, wherein the divided voltages and the currents are measured during different periods of time.

15. A gesture detecting method as defined in claim 12, wherein the divided voltages and the currents are measured during different periods of time.

18. A gesture detecting method as defined in claim 9, wherein the divided voltages indicate a midpoint of the two touch points.

19. The gesture detecting method as defined in claim 18, wherein:

the divided voltages indicate the midpoint of the two touch points in an X direction and a Y direction; and

the currents indicate the distance between the two touch points in the X direction and the Y direction.