TOUCH SENSITIVE SYSTEM AND APPARATUS AND METHOD FOR MEASURING SIGNALS OF TOUCH SENSITIVE SCREEN

• US 20160357327A1
• Filed: 08/19/2016
• Published: 12/08/2016
• Est. Priority Date: 05/18/2012
• Status: Abandoned Application

• Current Assignee: eGalax_eMPIA Technology Inc.
• Original Assignee: eGalax_eMPIA Technology Inc.
• Inventors: CHANG, CHIN-FU, YEH, SHANG-TAI
• Application Number:
  US15/241,552
• Publication Number:
  US 20160357327A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• 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

The present invention provides an apparatus for measuring signals of touch sensitive screen, which comprises multiple conductive strips including multiple parallel driving strips and multiple parallel sensing strips. Multiple intersecting areas are located at the intersections of these multiple driving and sensing strips. The apparatus comprises a driving circuit and a sensing circuit. The driving circuit sequentially provides a first driving signal and a second driving signal to a first set of the driving strips and a second set of the driving strips, respectively. The sensing circuit sequentially senses a first signal and a second signal of at least one sensing strips corresponding to the first driving signal and the second driving signal, respectively. The time duration of the first driving signal is different from the time duration of the second driving signal.

Claims

1. An apparatus for measuring signals of touch sensitive screen, which comprises multiple conductive strips including multiple parallel driving strips and multiple parallel sensing strips, wherein multiple intersecting areas are located at multiple intersections of the driving and sensing strips, the apparatus comprising:

a driving circuit, sequentially providing a first driving signal and a second driving signal to a first set of the driving strips and a second set of the driving strips, respectively; and

a sensing circuit, sequentially sensing a first signal and a second signal of at least one of sensing strips corresponding to the first driving signal and the second driving signal, respectively,

wherein the time duration of the first driving signal is different from the time duration of the second driving signal.

2. The apparatus of claim 1, wherein a time duration ratio of the driving time duration of the first driving signal to the driving time duration of the second driving signal corresponds to one of followings or the combination thereof:

an area ratio of the first set of the driving strips to the second set of the driving strips; and

an interval ratio of the interval between the first set of the driving strips and adjacent of the driving strips thereof to the interval between the second set of the driving strips and adjacent of the driving strips thereof.

3. The apparatus of claim 1, wherein a potential ratio of the driving time duration of the first driving signal to the driving time duration of the second driving signal corresponds to one of followings or the combination thereof:

an area ratio of the first set of the driving strips to the second set of the driving strips; and

an interval ratio of the interval between the first set of the driving strips and adjacent of the driving strips thereof to the interval between the second set of the driving strips and adjacent of the driving strips thereof.

4. The apparatus of claim 1, wherein the sensing circuit uses a first sensing time duration to produce the first signal and uses a second sensing time duration to produce the second signal, wherein the first sensing time duration corresponds to the driving time duration of the first driving signal and the second sensing time duration corresponds to the driving time duration of the second driving signal.

5. The apparatus of claim 4, wherein the first sensing time duration is equal to the driving time duration of the first driving signal, the second sensing time duration is equal to the driving time duration of the second driving signal, the first sensing time duration is different from the second sensing time duration.

6. The apparatus of claim 4, wherein the first sensing time duration is longer than the driving time duration of the first driving signal, the second sensing time duration is longer than the driving time duration of the second driving signal.

7. The apparatus of claim 1, wherein the sensing circuit produces the first signal after a first delay phase difference and produces the second signal after a second delay phase difference, wherein the first delay phase difference is different from the second delay phase difference.

8. The apparatus of claim 1, wherein the first set of driving strips includes one or multiple continuous the driving strips, the second set of driving strips includes one or multiple continuous the driving strips, the first set of driving strips and the second set of driving strips include the same amount of the driving strips.

9. The apparatus of claim 1, wherein the first set of the driving strips and the second set of the driving strips exclude any side of driving strip of the touch sensitive screen.

10. The apparatus of claim 1, wherein the driving circuit and the sensing circuit are one part of front-end module.

11. A method for measuring signals of touch sensitive screen, which comprises multiple conductive strips including multiple parallel driving strips and multiple parallel sensing strips, wherein multiple intersecting areas are located at multiple intersections of the driving and sensing strips, the method comprising:

sequentially providing a first driving signal and a second driving signal to a first set of the driving strips and a second set of the driving strips, respectively; and

sequentially sensing a first signal and a second signal of at least one of sensing strips corresponding to the first driving signal and the second driving signal, respectively,

wherein the time duration of the first driving signal is different from the time duration of the second driving signal.

12. The method of claim 11, wherein a time duration ratio of the driving time duration of the first driving signal to the driving time duration of the second driving signal corresponds to one of followings or the combination thereof:

an area ratio of the first set of the driving strips to the second set of the driving strips; and

an interval ratio of the interval between the first set of the driving strips and adjacent of the driving strips thereof to the interval between the second set of the driving strips and adjacent of the driving strips thereof.

13. The method of claim 11, wherein a potential ratio of the driving time duration of the first driving signal to the driving time duration of the second driving signal corresponds to one of followings or the combination thereof:

an area ratio of the first set of the driving strips to the second set of the driving strips; and

an interval ratio of the interval between the first set of the driving strips and adjacent of the driving strips thereof to the interval between the second set of the driving strips and adjacent of the driving strips thereof.

14. The method of claim 11, wherein the sensing circuit uses a first sensing time duration to produce the first signal and uses a second sensing time duration to produce the second signal, wherein the first sensing time duration corresponds to the driving time duration of the first driving signal and the second sensing time duration corresponds to the driving time duration of the second driving signal.

15. The method of claim 14, wherein the first sensing time duration is equal to the driving time duration of the first driving signal, the second sensing time duration is equal to the driving time duration of the second driving signal, the first sensing time duration is different from the second sensing time duration.

16. The method of claim 14, wherein the first sensing time duration is longer than the driving time duration of the first driving signal, the second sensing time duration is longer than the driving time duration of the second driving signal.

17. The method of claim 11, wherein the sensing circuit produces the first signal after a first delay phase difference and produces the second signal after a second delay phase difference, wherein the first delay phase difference is different from the second delay phase difference.

18. An apparatus for measuring signals of touch sensitive screen, which comprises multiple conductive strips including multiple parallel driving strips and multiple parallel sensing strips, wherein multiple intersecting areas are located at multiple intersections of the driving and sensing strips, the apparatus comprising:

a driving circuit, sequentially providing a first driving signal and a second driving signal to a first set of the driving strips and a second set of the driving strips, respectively; and

a sensing circuit, sequentially sensing a first signal and a second signal of at least one sensing strips corresponding to the first driving signal and the second driving signal, respectively,

wherein at least one of the following conditions or any combination thereof is satisfied;

the sensing circuit connecting the at least one sensing strip via a variable resistor, the variable resistor being set to a first resistance value as the sensing circuit generating the first signal, the variable resistor being set to a second resistance value as the sensing circuit generating the second signal, the first resistance value being different from the second resistance value;

the sensing circuit using a first sensing time duration to produce the first signal, the sensing circuit using a second sensing time duration to produce the second signal, the first sensing time duration being different from the second sensing time duration;

the sensing circuit connecting the at least one sensing strip via an amplifier, the amplifier being set to a first gain as the sensing circuit generating the first signal, the amplifier being set to a second gain as the sensing circuit generating the second signal, the first gain being different from the second gain;

the sensing circuit producing the first signal after a first delay phase difference, the sensing circuit producing the second signal after a second delay phase difference, the first delay phase difference being different from the second delay phase difference;

the potential of the first driving signal being different from the potential of the second driving signal;

a first driving time point for providing the first driving signal being different from a second driving time point for providing the second driving signal; and

the driving time duration of the first driving signal being different from the driving time duration of the second driving signal.

19. The apparatus of claim 18, wherein a time duration ratio of the driving time duration of the first driving signal to the driving time duration of the second driving signal corresponds to one of followings or the combination thereof:

an area ratio of the first set of the driving strips to the second set of the driving strips; and

an interval ratio of the interval between the first set of the driving strips and adjacent of the driving strips thereof to the interval between the second set of the driving strips and adjacent of the driving strips thereof.

20. The apparatus of claim 18, wherein a potential ratio of the driving time duration of the first driving signal to the driving time duration of the second driving signal corresponds to one of followings or the combination thereof:

an area ratio of the first set of the driving strips to the second set of the driving strips; and

an interval ratio of the interval between the first set of the driving strips and adjacent of the driving strips thereof to the interval between the second set of the driving strips and adjacent of the driving strips thereof.

21. The apparatus of claim 18, wherein the first sensing time duration corresponds to the driving time duration of the first driving signal, the second sensing time duration corresponds to the driving time duration of the second driving signal.

22. The apparatus of claim 21, wherein the first sensing time duration is equal to the driving time duration of the first driving signal, the second sensing time duration is equal to the driving time duration of the second driving signal, the first sensing time duration is different from the second sensing time duration.

23. The apparatus of claim 21, wherein the first sensing time duration is longer than the driving time duration of the first driving signal, the second sensing time duration is longer than the driving time duration of the second driving signal.

24. The apparatus of claim 18, wherein the first delay phase difference is different from the second delay phase difference.

25. The apparatus of claim 18, wherein the first set of driving strips includes one or multiple continuous the driving strips, the second set of driving strips includes one or multiple continuous the driving strips, the first set of driving strips and the second set of driving strips include the same amount of the driving strips.

26. The apparatus of claim 18, wherein the first set of the driving strips and the second set of the driving strips exclude any side of driving strip of the touch sensitive screen.

27. The apparatus of claim 18, wherein the driving circuit and the sensing circuit are one part of front-end module.

28. A method for measuring signals of touch sensitive screen, which comprises multiple conductive strips including multiple parallel driving strips and multiple parallel sensing strips, wherein multiple intersecting areas are located at multiple intersections of the driving and sensing strips, the method comprising:

sequentially providing a first driving signal and a second driving signal to a first set of the driving strips and a second set of the driving strips, respectively; and

sequentially sensing a first signal and a second signal of at least one of sensing strips corresponding to the first driving signal and the second driving signal, respectively,

wherein at least one of the following conditions or any combination thereof is satisfied;

the sensing circuit connecting the at least one sensing strip via a variable resistor, the variable resistor being set to a first resistance value as the sensing circuit generating the first signal, the variable resistor being set to a second resistance value as the sensing circuit generating the second signal, the first resistance value being different from the second resistance value;

the sensing circuit using a first sensing time duration to produce the first signal, the sensing circuit using a second sensing time duration to produce the second signal, the first sensing time duration being different from the second sensing time duration;

the sensing circuit connecting the at least one sensing strip via an amplifier, the amplifier being set to a first gain as the sensing circuit generating the first signal, the amplifier being set to a second gain as the sensing circuit generating the second signal, the first gain being different from the second gain;

the sensing circuit producing the first signal after a first delay phase difference, the sensing circuit producing the second signal after a second delay phase difference, the first delay phase difference being different from the second delay phase difference;

the potential of the first driving signal being different from the potential of the second driving signal;

a first driving time point for providing the first driving signal being different from a second driving time point for providing the second driving signal; and

the driving time duration of the first driving signal being different from the driving time duration of the second driving signal.

29. The method of claim 28, wherein a time duration ratio of the driving time duration of the first driving signal to the driving time duration of the second driving signal corresponds to one of followings or the combination thereof:

an area ratio of the first set of the driving strips to the second set of the driving strips; and

an interval ratio of the interval between the first set of the driving strips and adjacent of the driving strips thereof to the interval between the second set of the driving strips and adjacent of the driving strips thereof.

30. The method of claim 28, wherein a potential ratio of the driving time duration of the first driving signal to the driving time duration of the second driving signal corresponds to one of followings or the combination thereof:

an area ratio of the first set of the driving strips to the second set of the driving strips; and

an interval ratio of the interval between the first set of the driving strips and adjacent of the driving strips thereof to the interval between the second set of the driving strips and adjacent of the driving strips thereof.

31. The method of claim 28, wherein the first sensing time duration corresponds to the driving time duration of the first driving signal, the second sensing time duration corresponds to the driving time duration of the second driving signal.

32. The method of claim 31, wherein the first sensing time duration is equal to the driving time duration of the first driving signal, the second sensing time duration is equal to the driving time duration of the second driving signal, the first sensing time duration is different from the second sensing time duration.

33. The method of claim 31, wherein the first sensing time duration is longer than the driving time duration of the first driving signal, the second sensing time duration is longer than the driving time duration of the second driving signal.

34. The method of claim 28, wherein the first delay phase difference is different from the second delay phase difference.

35. A touch sensitive system, comprising:

a touch sensitive screen, comprising multiple conductive strips including multiple parallel driving strips and multiple parallel sensing strips, wherein multiple intersecting areas are located at multiple intersections of the driving and sensing strips; and

a signal-measuring apparatus, comprising;

a driving circuit, sequentially providing a first driving signal and a second driving signal to a first set of the driving strips and a second set of the driving strips, respectively; and

a sensing circuit, sequentially sensing a first signal and a second signal of at least one of sensing strips corresponding to the first driving signal and the second driving signal, respectively,

wherein the time duration of the first driving signal is different from the time duration of the second driving signal.