Driving circuit, display device and driving method

Patent metadata

Field	Value
Publication number	US-12340770-B2
Application number	US-202218262020-A
Country	US
Kind code	B2
Filing date	Jul 20, 2022
Priority date	Jul 20, 2022
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A driving circuit, a display device and a driving method relate to the field of display technology. The driving circuit includes: an induction coil, a first switch module, a first control circuit and a second control circuit. An induction coil is configured for receiving a first radio frequency signal or a second radio frequency signal to supply power to a driving circuit; a first switch module is respectively connected to the induction coil, the first control circuit and the second control circuit, and is configured for conducting the induction coil and the first control circuit in a first state or conducting the induction coil and the second control circuit in a second state; a first control circuit is configured for performing data transmission with a first terminal in the first state; the first terminal is a terminal for transmitting a first radio frequency signal.

First claim

The invention claimed is:

1. A driving circuit, comprising: an induction coil, a first switch module, a first control circuit and a second control circuit;
wherein the induction coil is configured for receiving a first radio frequency signal or a second radio frequency signal to supply power to the driving circuit;
the first switch module is respectively connected to the induction coil, the first control circuit and the second control circuit, and is configured for conducting the induction coil and the first control circuit in a first state or conducting the induction coil and the second control circuit in a second state;
the first control circuit is configured for performing data transmission with a first terminal in the first state; the first terminal is a terminal for transmitting the first radio frequency signal; and
the second control circuit is further connected to a display unit, and is configured for receiving display data sent by a second terminal in the second state, and controlling the display unit to display according to the display data; the second terminal is a terminal for transmitting the second radio frequency signal.

2. The driving circuit according to claim 1 , wherein the first switch module comprises at least one of: a magnetic reed switch, a tact switch and a toggle switch.

3. The driving circuit according to claim 2 , wherein the second control circuit comprises: a power supply control module, a storage capacitor and a display control module;
wherein the power supply control module is respectively connected to the first switch module, the storage capacitor and the display control module, and is configured for collecting second electric energy generated by the induction coil receiving the second radio frequency signal, storing the second electric energy into the storage capacitor, and controlling the storage capacitor to conduct with the display control module when a storage voltage of the storage capacitor meets a power supply condition; and
the display control module is further connected to the display unit, and is configured for controlling the display unit to display according to the display data driven by the storage voltage.

4. The driving circuit according to claim 2 , wherein the first control circuit comprises a passive electronic tag.

5. The driving circuit according to claim 1 , wherein the second control circuit comprises: a power supply control module, a storage capacitor and a display control module;
wherein the power supply control module is respectively connected to the first switch module, the storage capacitor and the display control module, and is configured for collecting second electric energy generated by the induction coil receiving the second radio frequency signal, storing the second electric energy into the storage capacitor, and controlling the storage capacitor to conduct with the display control module when a storage voltage of the storage capacitor meets a power supply condition; and
the display control module is further connected to the display unit, and is configured for controlling the display unit to display according to the display data driven by the storage voltage.

6. The driving circuit according to claim 5 , wherein the power supply control module comprises a processing unit, a voltage comparator and a second switch module;
wherein the processing unit is respectively connected to the first switch module, the storage capacitor, the voltage comparator and the second switch module, and is configured for collecting the second electric energy, storing the second electric energy into the storage capacitor; generating a control signal of the second switch module according to a comparison result output by the voltage comparator;
the voltage comparator is further connected to the storage capacitor and a reference voltage input end, and is configured for comparing the storage voltage with a reference voltage input by the reference voltage input end and outputting a comparison result to the processing unit; and
the second switch module is further connected to the storage capacitor and the display control module, and is configured for controlling the conduction/shutoff between the storage capacitor and the display control module according to the control signal.

7. The driving circuit according to claim 6 , wherein the second switch module comprises:
a first transistor, a control electrode of the first transistor being connected to the processing unit, a first electrode of the first transistor being connected to the storage capacitor and a second electrode of the first transistor being connected to the display control module.

8. The driving circuit according to claim 7 , wherein the display control module comprises a second transistor, a current limiting resistor, a boost circuit and a driving chip;
wherein for the second transistor, a control electrode of the second transistor is connected to the driving chip, a first electrode of the second transistor is connected to the boost circuit, and a second electrode of the second transistor is respectively connected to a first end of the current limiting resistor and the driving chip;
the boost circuit is further connected to the power supply control module, a first interface of the driving chip and a second interface of the driving chip, and is configured for performing voltage writing on the first interface and the second interface according to the output of a first electrode of the second transistor driven by the storage voltage;
a second end of the current limiting resistor is connected to ground; and
the driving chip is further connected to the display unit, and is configured for providing a pulse signal to the display unit according to the display data, a voltage of the first interface and a voltage of the second interface.

9. The driving circuit according to claim 6 , wherein the display control module comprises a second transistor, a current limiting resistor, a boost circuit and a driving chip;
wherein for the second transistor, a control electrode of the second transistor is connected to the driving chip, a first electrode of the second transistor is connected to the boost circuit, and a second electrode of the second transistor is respectively connected to a first end of the current limiting resistor and the driving chip;
the boost circuit is further connected to the power supply control module, a first interface of the driving chip and a second interface of the driving chip, and is configured for performing voltage writing on the first interface and the second interface according to the output of a first electrode of the second transistor driven by the storage voltage;
a second end of the current limiting resistor is connected to ground; and
the driving chip is further connected to the display unit, and is configured for providing a pulse signal to the display unit according to the display data, a voltage of the first interface and a voltage of the second interface.

10. The driving circuit according to claim 5 , wherein the display control module comprises a second transistor, a current limiting resistor, a boost circuit and a driving chip;
wherein for the second transistor, a control electrode of the second transistor is connected to the driving chip, a first electrode of the second transistor is connected to the boost circuit, and a second electrode of the second transistor is respectively connected to a first end of the current limiting resistor and the driving chip;
the boost circuit is further connected to the power supply control module, a first interface of the driving chip and a second interface of the driving chip, and is configured for performing voltage writing on the first interface an

Assignees

• Chongqing Boe Smart Electronics System Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Xie Yunyan
• Chen Lichun
• Yu Xinbo
• Chen Nanting
• Cheng Qiangeng
• Chen Junsheng

Classifications

• G09G2370/00

  Aspects of data communication · CPC title

• G09G2330/02

  Details of power systems and of start or stop of display operation · CPC title

• G06K19/0723 Primary

  the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs · CPC title

• G06K19/0708

  the source being electromagnetic or magnetic · CPC title

• G09G3/344 Primary

  based on particles moving in a fluid or in a gas, e.g. electrophoretic devices (electrophoretic devices per se G02F1/167) · CPC title