SCAN METHOD OF TOUCH SIGNAL

• US 20160357302A1
• Filed: 06/25/2015
• Published: 12/08/2016
• Est. Priority Date: 06/02/2015
• Status: Abandoned Application

• Current Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Xie, Jianxing, Zuo, Qingcheng
• Application Number:
  US14/771,504
• Publication Number:
  US 20160357302A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 a scan method of a touch signal. The different scan pulse signals with an amount corresponding to a plurality of driving lines are employed to perform scan simultaneously, and a corresponding coding is performed to each scan pulse signal; meanwhile, each of a plurality of receiving lines synchronously receives all the scan pulse signals, and a control chip is employed to decode the receiving signal received by each receiving line to determine the sources of the different signal segments in the receiving signal; as the finger touches, it is determined that the driving line corresponding to the number of the scan pulse signal is touched by the finger, and with combination of the receiving line corresponded with the receiving signal of the signal segment, of which the signal value becomes smaller, an touch position is acquired. The method can decrease an occupied period of performing scan to a touch signal by an In Cell touch control display device to increase the period of display signal scan for urging the In Cell touch control display device to be developed with higher resolution.

Claims

1. A scan method of a touch signal, comprising steps of:

step 1, providing a touch display panel;

the touch display panel comprises m horizontal driving lines which are parallel with one another and sequentially aligned, and n vertical receiving lines which are parallel with one another and sequentially aligned, wherein both m, n are integers larger than 2;

step 2, employing a signal generator to simultaneously generate a different scan pulse signals to perform scan to the a driving lines simultaneously, wherein 2≦

a≦

m, and a falling edge of the scan pulse signal corresponding to the previous driving line and a rising edge of the scan pulse signal corresponding to the next driving line are simultaneously generated, and a corresponding coding is performed to each scan pulse signal;

as the a scan pulse signals perform scan to the a driving lines simultaneously, all the receiving lines synchronously receives all the scan pulse signals provided by the a driving lines to make that each receiving line receives a receiving signal of the same signal value;

step 3, employing a control chip to decode the receiving signal received by each receiving line to acquire numbers of different scan pulse signals corresponding to different signal segment in the receiving signal;

step 4, as a finger touches the touch display panel, according to the numbers of the signal segment, of which the signal value becomes smaller, it is determined that the driving line corresponding to the number of the scan pulse signal is touched by the finger, and with combination of the receiving line corresponded with the receiving signal of the signal segment, of which the signal value becomes smaller, an touch position is acquired.

2. The scan method of the touch signal according to claim 1, wherein in the step 2, the scan pulse signal corresponding to ith driving line is numbered to be i, wherein 1≦

i≦

a.

3. The scan method of the touch signal according to claim 2, wherein in the step 2, a sum of pulse durations of all the scan pulse signals is equal to a pulse duration of the receiving signal.

4. The scan method of the touch signal according to claim 3, wherein in the step 3, in chronological order, the signal segment number of the scan pulse signal, which is numbered to be i, corresponded with the receiving signal is i.

5. The scan method of the touch signal according to claim 4, wherein a specific process of the step 4 is:

as the finger touches a dot of the ith driving line and yth receiving line, wherein 1≦

y≦

n, the signal value of the signal segment which is numbered to be i, corresponded with the receiving signal received by the yth receiving line becomes smaller, and with the number i of the signal segment of which the signal value becomes smaller in the receiving signal, it is determined that what the finger touches is the ith driving signal line correspondingly providing the scan pulse signal, of which the number is i, and with combination of the yth receiving line corresponded with the receiving signal of the signal segment, of which the signal value becomes smaller, an touch position at the dot of the ith driving line and yth receiving line is acquired.

6. The scan method of the touch signal according to claim 1, wherein both the driving lines and the receiving lines are formed at common electrode layer.

7. The scan method of the touch signal according to claim 1, wherein the driving lines are formed at common electrode layer, and the receiving lines are formed at another metal layer, which is not the common electrode layer.

8. The scan method of the touch signal according to claim 1, wherein the scan pulse signal is a high frequency signal.

9. The scan method of the touch signal according to claim 1, wherein the touch display panel is an In Cell type touch display panel.

10. The scan method of the touch signal according to claim 1, wherein the touch display panel is a mutual capacitance type touch display panel.

11. A scan method of a touch signal, comprising steps of:

step 1, providing a touch display panel;

the touch display panel comprises m horizontal driving lines which are parallel with one another and sequentially aligned, and n vertical receiving lines which are parallel with one another and sequentially aligned, wherein both m, n are integers larger than 2;

step 2, employing a signal generator to simultaneously generate a different scan pulse signals to perform scan to the a driving lines simultaneously, wherein 2≦

a≦

m, and a falling edge of the scan pulse signal corresponding to the previous driving line and a rising edge of the scan pulse signal corresponding to the next driving line are simultaneously generated, and a corresponding coding is performed to each scan pulse signal;

as the a scan pulse signals perform scan to the a driving lines simultaneously, all the receiving lines synchronously receives all the scan pulse signals provided by the a driving lines to make that each receiving line receives a receiving signal of the same signal value;

step 3, employing a control chip to decode the receiving signal received by each receiving line to acquire numbers of different scan pulse signals corresponding to different signal segment in the receiving signal;

step 4, as a finger touches the touch display panel, according to the numbers of the signal segment, of which the signal value becomes smaller, it is determined that the driving line corresponding to the number of the scan pulse signal is touched by the finger, and with combination of the receiving line corresponded with the receiving signal of the signal segment, of which the signal value becomes smaller, an touch position is acquired;

wherein in the step 2, the scan pulse signal corresponding to ith driving line is numbered to be i, wherein 1≦

i≦

a;

wherein the touch display panel is an In Cell type touch display panel;

wherein the touch display panel is a mutual capacitance type touch display panel.

12. The scan method of the touch signal according to claim 11, wherein in the step 2, a sum of pulse durations of all the scan pulse signals is equal to a pulse duration of the receiving signal.

13. The scan method of the touch signal according to claim 12, wherein in the step 3, in chronological order, the signal segment number of the scan pulse signal, which is numbered to be i, corresponded with the receiving signal is i.

14. The scan method of the touch signal according to claim 13, wherein a specific process of the step 4 is:

as the finger touches a dot of the ith driving line and yth receiving line, wherein 1≦

y≦

n, the signal value of the signal segment which is numbered to be i, corresponded with the receiving signal received by the yth receiving line becomes smaller, and with the number i of the signal segment of which the signal value becomes smaller in the receiving signal, it is determined that what the finger touches is the ith driving signal line correspondingly providing the scan pulse signal, of which the number is i, and with combination of the yth receiving line corresponded with the receiving signal of the signal segment, of which the signal value becomes smaller, an touch position at the dot of the ith driving line and yth receiving line is acquired.

15. The scan method of the touch signal according to claim 11, wherein both the driving lines and the receiving lines are formed at common electrode layer.

16. The scan method of the touch signal according to claim 11, wherein the driving lines are formed at common electrode layer, and the receiving lines are formed at another metal layer, which is not the common electrode layer.

17. The scan method of the touch signal according to claim 11, wherein the scan pulse signal is a high frequency signal.