Touch circuit and driving method thereof, and driving system for a touch display device

Patent metadata

Field	Value
Publication number	US-11662846-B2
Application number	US-202117412874-A
Country	US
Kind code	B2
Filing date	Aug 26, 2021
Priority date	Sep 26, 2019
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

A touch circuit includes a touch IC and a logic sub-circuit. The touch IC includes a touch signal port. The logic sub-circuit is connected to the touch signal port, and is configured to transmit a touch enabling signal to the touch signal port. The logic sub-circuit includes an AND gate. The AND gate includes a first input terminal, a second input terminal and an output terminal electrically connected to the touch signal port. The AND gate is configured to output the touch enabling signal through the output terminal electrically connected to the touch signal port in response to receiving one of a backlight turn-on signal and a screen turn-on signal through the first input terminal, and a touch generation signal through the second input terminal.

First claim

What is claimed is:

1. A touch circuit, comprising:
a touch IC including a touch signal port; and
a logic sub-circuit electrically connected to the touch signal port, and being configured to output a touch enabling signal to the touch signal port; wherein
the logic sub-circuit includes an AND gate, the AND gate includes a first input terminal, a second input terminal and an output terminal electrically connected to the touch signal port; and the AND gate is configured to output the touch enabling signal through the output terminal electrically connected to the touch signal port in response to receiving one of a backlight turn-on signal and a screen turn-on signal through the first input terminal, and a touch generation signal through the second input terminal.

2. The touch circuit according to claim 1 , wherein the AND gate further includes a third input terminal; wherein
the AND gate is configured to output the touch enabling signal through the output terminal electrically connected to the touch signal port in response to receiving one of the backlight turn-on signal and the screen turn-on signal through the first input terminal, the touch generation signal through the second input terminal, and another of the backlight turn-on signal and the screen turn-on signal through the third input terminal.

3. The touch circuit according to claim 1 , wherein the logic sub-circuit further includes a first resistor; a first electrode of the first resistor is configured to receive a control voltage, and a second electrode of the first resistor is electrically connected to the second input terminal of the AND gate.

4. The touch circuit according to claim 1 , wherein the logic sub-circuit further includes:
a second resistor, wherein a first electrode of the second resistor is configured to receive one of the backlight turn-on signal and the screen turn-on signal, and a second electrode of the second resistor is electrically connected to the first input terminal of the AND gate; and
a third resistor, wherein a first electrode of the third resistor is configured to receive the touch generation signal, and a second electrode of the third resistor is electrically connected to the second input terminal of the AND gate.

5. The touch circuit according to claim 1 , wherein the touch IC further includes a data signal port and a clock signal port; the touch circuit further comprises:
a first switching sub-circuit electrically connected to the data signal port, a first signal input terminal and a data signal input terminal, wherein the first switching sub-circuit is configured to transmit a signal from the data signal input terminal to the data signal port under control of the signal from the first signal input terminal; and
a second switching sub-circuit electrically connected to the clock signal port, the first signal input terminal and a clock signal input terminal, wherein the second switching sub-circuit is configured to transmit a signal from the clock signal input terminal to the clock signal port under control of the signal from the first signal input terminal.

6. The touch circuit according to claim 5 , wherein the first switching sub-circuit includes a first transistor, wherein
a gate of the first transistor is electrically connected to the first signal input terminal, a first electrode of the first transistor is electrically connected to the data signal port, and a second electrode of the first transistor is electrically connected to the data signal input terminal.

7. The touch circuit according to claim 5 , wherein the second switching sub-circuit includes a second transistor; wherein
a gate of the second transistor is electrically connected to the first signal input terminal, a first electrode of the second transistor is electrically connected to the clock signal port, and a second electrode of the second transistor is electrically connected to the clock signal input terminal.

8. The touch circuit according to claim 1 , wherein the touch IC further includes a data signal port and a clock signal port; the touch circuit further comprises:
a first pull-up sub-circuit electrically connected to a first signal input terminal and the data signal port, wherein the first pull-up sub-circuit is configured to transmit a signal from the first signal input terminal to the data signal port; and
a second pull-up sub-circuit electrically connected to the first signal input terminal and the clock signal port, wherein the second pull-up sub-circuit is configured to transmit the signal from the first signal input terminal to the clock signal port.

9. The touch circuit according to claim 8 , wherein the first pull-up sub-circuit includes a first pull-up resistor, wherein
a first electrode of the first pull-up resistor is electrically connected to the first signal input terminal, and a second electrode of the first pull-up resistor is electrically connected to the data signal port of the touch IC.

10. The touch circuit according to claim 8 , wherein the second pull-up sub-circuit includes a second pull-up resistor, wherein
a first electrode of the second pull-up resistor is electrically connected to the first signal input terminal, and a second electrode of the second pull-up resistor is electrically connected to the clock signal port.

11. A driving method of a touch circuit, the touch circuit being the touch circuit according to claim 1 , the driving method comprising:
outputting, by the logic sub-circuit, the touch enabling signal to the touch signal port in response to a touch operation, so as to activate the touch signal port, wherein
outputting, by the logic sub-circuit, the touch enabling signal in response to the touch operation includes: outputting, by the AND gate, the touch enabling signal through the output terminal in response to receiving the touch generation signal through the second input terminal, and one of the backlight turn-on signal and the screen turn-on signal through the first input terminal.

12. The driving method according to claim 11 , wherein the AND gate further includes a third input terminal; and outputting, by the logic sub-circuit, the touch enabling signal in response to the touch operation includes:
outputting, by the AND gate, the touch enabling signal through the output terminal in response to receiving the touch generation signal through the second input terminal, one of the backlight turn-on signal and the screen turn-on signal through the first input terminal, and another of the backlight turn-on signal and the screen turn-on signal through the third input terminal.

13. The driving method according to claim 11 , wherein the touch IC includes a data signal port and a clock signal port; the touch circuit includes a first switching sub-circuit and a second switching sub-circuit; the first switching sub-circuit is electrically connected to the data port, a first signal input terminal and a data signal input terminal; the second switching sub-circuit is electrically connected to the clock signal port, the first signal input terminal and a clock signal input terminal; and the driving method further comprises:
receiving, by the first signal input terminal, a signal;
transmitting, by the first switching sub-circuit, a signal from the data signal input terminal to the data signal port under control of the signal from the first signal input terminal; and
transmitting, by the second switching sub-circuit, a signal from the clock signal input terminal to the clock signal port under control of the signal from the first signal input terminal.

14. The driving method according to claim 11 , wherein the touch IC further includ

Assignees

• Chongqing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Rao Yang
• Zuo Cheng
• Zhang Dayu
• Dang Kangpeng
• Chen Hong
• Qin Peng
• Jin Zhong
• Wang Bo
• Luo Zhongli
• Guo Xiong
• Huang Shifei
• Liu Teng
• Tang Yuansheng

Classifications

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0418

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

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title