System and Method for Scanning Control of a Capacitive Touch Panel

• US 20100259505A1
• Filed: 06/24/2010
• Published: 10/14/2010
• Est. Priority Date: 06/20/2006
• Status: Active Grant

• Current Assignee: eGalax_eMPIA Technology Inc.
• Original Assignee: eGalax_eMPIA Technology Inc.
• Inventors: CHANG, CHIN-FU
• Granted Patent: US 9,626,044 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• 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 3/044 by capacitive means
• 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

Abstract

This invention provides a system for scanning control of a capacitive touch panel. The system includes a driving unit driving a partially neighboring of a plurality of first axial conductive strips of the capacitive touch panel, wherein the plurality of first axial conductive strips are parallel to each other, and a first detecting unit detecting one of the partially neighboring of first axial conductive strips. By doing so, the influence caused by unintended conducting materials can be kept from the touch point detection for the capacitive touch panel, and the electro-magnetic interference of the capacitive touch panel can be also decreased.

Claims

1. A system for scanning control of a capacitive touch panel, said device comprising:

a driving unit, simultaneously driving a partially neighboring of a plurality of first axial conductive strips of said capacitive touch panel, wherein said plurality of first axial conductive strips are parallel to each other; and

a first detecting unit, detecting one of said partially neighboring of first axial conductive strips, said plurality of first axial conductive strips detected by said first detecting unit with the same effect resulted from the decay of said first detecting unit.

2. The system according to claim 1, wherein said one of said partially neighboring of first axial conductive strips positions at the middle of said partially neighboring of first axial conductive strips.

3. The system according to claim 2, wherein said partially neighboring of first axial conductive strips include 3, 5, or 7 first axial conductive strips.

4. The system according to claim 1, wherein said plurality of first axial conductive strips are X-axial or Y-axial.

5. The system according to claim 1, further comprising a signal processing unit processing a first data receiving from said first detecting unit.

6. The system according to claim 5, further comprising a control unit receiving a second data from said signal processing unit and controlling said driving unit and said first detecting unit.

7. The system according to claim 6, wherein said first data is translated into said second data by including filtering, sampling, amplifying, and analog-to-digital converting.

8. The system according to claim 1, wherein said driving unit further simultaneously drives a partially neighboring of a plurality of second axial conductive strips of said capacitive touch panel, said plurality of second axial conductive strips are parallel to each other and intersect with said plurality of first axial conductive strips with electrical isolation, wherein a second detecting unit detects one of said partially neighboring of second axial conductive strips, said plurality of second axial conductive strips detected by said second detecting unit with the same effect resulted from the decay of said second detecting unit.

9. The system according to claim 8, wherein said one of said partially neighboring of second axial conductive strips positions at the middle of said partially neighboring of second axial conductive strips.

10. The system according to claim 9, wherein said partially neighboring of second axial conductive strips include 3, 5, or 7 second axial conductive strips.

11. The system according to claim 8, further comprising a signal processing unit processing a first data receiving from said first and second detecting units through a switching unit.

12. The system according to claim 11, further comprising a control unit receiving a second data from said signal processing unit and controlling said driving unit, said first and second detecting units, and said switching unit.

13. The system according to claim 12, wherein said first data is translated into said second data by including filtering, sampling, amplifying, and analog-to-digital converting.

14. A method for scanning control of a capacitive touch panel, said method comprising:

simultaneously driving a partially neighboring of a plurality of first axial conductive strips of said capacitive touch panel by a driving unit, wherein said plurality of first axial conductive strips are parallel to each other; and

detecting one of said partially neighboring of first axial conductive strips by a first detecting unit, said plurality of first axial conductive strips detected by said first detecting unit with the same effect resulted from the decay of said first detecting unit.

15. The method according to claim 14, wherein said one of said partially neighboring of first axial conductive strips positions at the middle of said partially neighboring of first axial conductive strips.

16. The method according to claim 15, wherein said partially neighboring of first axial conductive strips include 3, 5, or 7 first axial conductive strips.

17. The method according to claim 14, wherein said plurality of first axial conductive strips are X-axial or Y-axial.

18. The method according to claim 14, further comprising:

processing a first data receiving from said first detecting unit by a signal processing unit.

19. The method according to claim 18, further comprising:

receiving a second data from said signal processing unit and controlling said driving unit and said first detecting unit by a control unit.

20. The method according to claim 19, wherein said first data is translated into said second data by including filtering, sampling, amplifying, and analog-to-digital converting.

21. The method according to claim 14, further comprising:

simultaneously driving a partially neighboring of a plurality of second axial conductive strips of said capacitive touch panel by said driving unit, wherein said plurality of second axial conductive strips are parallel to each other and intersect with said plurality of first axial conductive strips with electrical isolation; and

detecting one of said partially neighboring of second axial conductive strips by a second detecting unit, said plurality of second axial conductive strips detected by said second detecting unit with the same effect resulted from the decay of said second detecting unit.

22. The method according to claim 21, wherein said one of said partially neighboring of second axial conductive strips positions at the middle of said partially neighboring of second axial conductive strips.

23. The method according to claim 22, wherein said partially neighboring of second axial conductive strips include 3, 5, or 7 second axial conductive strips.

24. The method according to claim 21, further comprising:

processing a first data receiving from said first and second detecting units through a switching unit by a signal processing unit.

25. The method according to claim 24, further comprising:

receiving a second data from said signal processing unit and controlling said driving unit, said first and second detecting units, and said switching unit by a control unit.

26. The method according to claim 25, wherein said first data is translated into said second data by including filtering, sampling, amplifying, and analog-to-digital converting.