Touch sensitive system and apparatus and method for measuring signals of touch sensitive screen

Patent metadata

Field	Value
Publication number	US-2016357327-A1
Application number	US-201615241552-A
Country	US
Kind code	A1
Filing date	Aug 19, 2016
Priority date	May 18, 2012
Publication date	Dec 8, 2016
Grant date	—

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.

First claim

What is claimed is:

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, sequ

Assignees

• Egalax_Empia Tech Inc

Inventors

• Chang Chin-Fu
• Yeh Shang-Tai

Classifications

• G06F3/044

  by capacitive means · CPC title

• G06F2203/04111

  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 title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/0446 Primary

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0418

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title