Audio device and control method thereof

Patent metadata

Field	Value
Publication number	US-12438989-B2
Application number	US-202318485328-A
Country	US
Kind code	B2
Filing date	Oct 12, 2023
Priority date	Aug 31, 2023
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

An audio device and a control method thereof are provided. The audio device includes a charger and at least one audio broadcaster. The charger is coupled to a transmission line and is configured to generate a charging voltage. The audio broadcaster is coupled to the charger through the transmission line. The charger transmits the charging voltage to the audio broadcaster through the transmission line, and transmits first data to the audio broadcaster through the transmission line. The audio broadcaster transmits second data to the charger through the transmission line.

First claim

What is claimed is:

1. An audio device, comprising:
a charger, coupled to a transmission line and configured to generate a charging voltage; and
at least one audio broadcaster, coupled to the charger through the transmission line,
wherein the charger transmits the charging voltage to the at least one audio broadcaster through the transmission line, the charger transmits first data to the at least one audio broadcaster through the transmission line, and the charger receives second data from the at least one audio broadcaster through the transmission line,
wherein the charger carries the first data onto the charging voltage for transmission to the at least one audio broadcaster, and the at least one audio broadcaster carries the second data onto the charging voltage for transmission to the charger simultaneously.

2. The audio device according to claim 1 , wherein the charger comprises:
a charging voltage generating circuit, generating the charging voltage according to a source voltage and providing the charging voltage to the transmission line;
a control circuit, coupled to the transmission line, generating the first data, and carrying the first data onto the charging voltage; and
a receiving circuit, coupled to the transmission line, and filtering out the charging voltage to obtain the second data.

3. The audio device according to claim 2 , wherein the control circuit determines whether to pull down the charging voltage to a first voltage according to a logic value of the first data to carry the first data to the charging voltage.

4. The audio device according to claim 3 , wherein the first voltage is greater than a reference ground voltage.

5. The audio device according to claim 2 , wherein the receiving circuit comprises:
a capacitor; and
an amplifying circuit,
wherein the capacitor is connected in series between the transmission line and the amplifying circuit, the capacitor is configured to filter out a DC component signal of a signal on the transmission line to obtain an AC component signal, and the amplifying circuit amplifies the AC component signal to obtain read data.

6. The audio device according to claim 5 , wherein the amplifying circuit further transmits the read data in analog form to the control circuit, and the control circuit converts the read data into digital form to obtain the second data.

7. The audio device according to claim 2 , wherein the charging voltage generating circuit is a voltage booster.

8. The audio device according to claim 2 , wherein the control circuit comprises:
a microcontroller; and
a signal transmitter, coupled to the microcontroller and the transmission line, and configured to carry the first data onto the charging voltage.

9. The audio device according to claim 8 , wherein the receiving circuit comprises:
a capacitor; and
an amplifying circuit,
wherein the capacitor is connected in series between the transmission line and the amplifying circuit, the capacitor is configured to filter out a DC component signal of a signal on the transmission line to obtain an AC component signal, and the amplifying circuit amplifies the AC component signal to obtain read data.

10. The audio device according to claim 8 , wherein the amplifying circuit further transmits the read data in analog form to the control circuit, and the control circuit converts the read data into digital form to obtain the first data.

11. The audio device according to claim 1 , wherein the at least one audio broadcaster comprises:
a charging control circuit, coupled to the transmission line and providing the charging voltage to charge a battery;
a receiving circuit, coupled to the transmission line and filtering out the charging voltage to obtain the first data; and
a control circuit, coupled to the transmission line, generating the second data, and carrying the second data onto the charging voltage.

12. The audio device according to claim 11 , wherein the control circuit determines whether to pull down the charging voltage to a second voltage according to a logic value of the second data to carry the second data to the charging voltage.

13. The audio device according to claim 12 , wherein the second voltage is greater than a reference ground voltage.

14. The audio device according to claim 11 , wherein the control circuit comprises:
a microcontroller; and
a signal transmitter, coupled to the microcontroller and the transmission line, and configured to carry the second data onto the charging voltage.

15. A control method of an audio device, comprising:
coupling a charger and at least one audio broadcaster to each other through a transmission line;
transmitting a charging voltage and first data to the at least one audio broadcaster through the transmission line by the charger;
transmitting second data to the charger through the transmission line by the at least one audio broadcaster;
providing the charger to carry the first data onto the charging voltage for transmission to the at least one audio broadcaster; and
providing the at least one audio broadcaster to carry the second data onto the charging voltage for transmission to the charger simultaneously.

16. The control method according to claim 15 , further comprising:
determining whether to pull down the charging voltage to a first voltage by the charger according to a logic value of the first data to carry the first data to the charging voltage; and
determining whether to pull down the charging voltage to a second voltage by the at least one audio broadcaster according to a logic value of the second data to carry the second data to the charging voltage.

17. The control method according to claim 16 , wherein the first voltage and the second voltage are both greater than a reference ground voltage.

Assignees

• Merry Electronics Shenzhen Co Ltd

Inventors

• Li Hung-Yuan

Classifications

• H04H20/76 Primary

  Wired systems · CPC title

• H04M9/001

  Two-way communication systems between a limited number of parties · CPC title

• H04M19/08 Primary

  with current supply sources at the substations (generating ringing current H04M19/04) · CPC title