Audio system of a vehicle

• US 9,204,216 B2
• Filed: 12/20/2013
• Issued: 12/01/2015
• Est. Priority Date: 06/24/2013
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chen, Chih-Ming, Shih, Tun-Hsiang
• Primary Examiner(s): ADDY, THJUAN KNOWLIN
• Application Number:
  US14/137,321
• Publication Number:
  US 20140376739A1
• Time in Patent Office: 711 Days
• Field of Search: 381/86, 381/306, 381/302, 381/389, 381/395, 381/173, 381/174, 381/190, 381/191, 340/438, 340/988, 340/500
• US Class Current: 1/1
• CPC Class Codes: H04R 2499/13 Acoustic transducers and sound field adaptation in vehicles
• CPC Class Codes: H04R 3/00 Circuits for transducers , loudspeakers or microphones

Abstract

An audio system of a vehicle includes a mainframe, a panel computer, and a power converting circuit. The mainframe includes a power signal output terminal. The power converting circuit includes a charging unit, a switch unit, and a battery unit. When the power signal output terminal is electrically connected to the power converting circuit, the power signal output terminal outputs a first DC voltage to the power converting circuit, the power converting circuit converts the first DC voltage to a second DC voltage, which is provided to the panel computer, and the first DC voltage charges the battery unit via the charging unit and the switch unit. When the power signal output terminal and the power converting circuit are disconnected, the battery unit outputs the first DC voltage, and the power converting circuit converts the first DC voltage into the second DC voltage, which is provided to the panel computer.

Claims

1. An audio system configured for a vehicle comprising:

a mainframe comprising an audio signal positive output terminal and a power signal output terminal, the audio signal positive output terminal being configured to output an audio signal;

a panel computer comprising an audio signal positive input terminal, the audio signal positive input terminal being configured to receive the audio signal, the panel computer being configured to convert the audio signal to an sound signal and to output the sound signal; and

a power converting circuit comprising a charging unit, a switch unit and a battery unit;

wherein when the power signal output terminal is electrically connected to the power converting circuit, the power signal output terminal outputs a first Direct Current (DC) voltage to the power converting circuit, the power converting circuit converts the first DC voltage to a second DC voltage which is provided to the panel computer, the first DC voltage charges the battery unit via the charging unit and the switch unit; and

when the power signal output terminal and the power converting circuit are disconnected, the battery unit outputs the first DC voltage, the power converting circuit converts the first DC voltage to the second DC voltage which is provided to the panel computer.

2. The audio system of claim 1, wherein the power converting circuit further comprises a voltage decreasing circuit;

a first terminal of the charging unit is electrically connected to the power signal output terminal to receive the first DC voltage;

the first terminal of the charging unit is electrically connected to the panel computer via the voltage decreasing circuit;

a second terminal of the charging unit is electrically connected to the switch unit;

the switch unit is grounded via the battery unit; and

the switch unit is electrically connected to the panel computer via the voltage decreasing circuit.

3. The audio system of claim 2, wherein the switch unit comprises a first terminal, a second terminal and a third terminal;

the second terminal of the charging unit is electrically connected to the first terminal of the switch unit;

the second terminal of the switch unit is grounded via the battery unit;

the third terminal of the switch unit is electrically connected to the first terminal of the charging unit;

the third terminal of the switch unit is electrically connected to a first terminal of the voltage decreasing circuit; and

a second terminal of the voltage decreasing circuit is configured for output the second DC voltage.

4. The audio system of claim 3, wherein the mainframe further comprises an audio signal negative output terminal;

the panel computer further comprises an audio signal negative input terminal;

the audio signal positive output terminal is configured to output the audio signal; and

the audio signal negative input terminal is electrically connected to the audio signal negative output terminal to receive the audio signal.

5. The audio system of claim 4, wherein the first DC voltage is +12V;

and the second DC voltage is +5V.

6. The audio system of claim 4, wherein panel computer is electrically connected to the mainframe by connecting lines or by inserting card and inserting slot.

7. The audio system of claim 4, wherein when the panel computer is attached to the system, the voltage decreasing circuit converts the first DC voltage to the second DC voltage, the second DC voltage is provided to the panel computer, the first terminal and the second terminal of the switch unit are electrically connected, the second terminal and the third terminal of the switch unit are disconnected, the first DC voltage charges the battery unit via the charging unit.

8. The audio system of claim 7, wherein when the panel computer is detached from the system, the first terminal and the second terminal of the switch unit are disconnected, the second terminal and the third terminal of the switch unit are electrically connected, the battery unit outputs the first DC voltage, the voltage decreasing circuit converts the first DC voltage to the second DC voltage, the second DC voltage is provided to the panel computer.

9. The audio system of claim 8, wherein the switch unit is a single-pole double throw switch.

10. An audio system configured for a vehicle comprising:

a mainframe comprising an audio signal positive output terminal and a power signal output terminal, the audio signal positive output terminal being configured to output an audio signal;

a panel computer comprising an audio signal positive input terminal, the audio signal positive input terminal being configured to receive the audio signal, the panel computer being configured to convert the audio signal to an sound signal and to output the sound signal; and

a power converting circuit comprising a charging unit, a switch unit, a battery unit and a voltage decreasing circuit;

wherein when the power signal output terminal is electrically connected to the power converting circuit, the power signal output terminal outputs a first Direct Current (DC) voltage to the power converting circuit, the voltage decreasing circuit converts the first DC voltage to a second DC voltage which is provided to the panel computer, the first DC voltage charges the battery unit via the charging unit and the switch unit; and

when the power signal output terminal and the power converting circuit are disconnected, the battery unit outputs the first DC voltage to the voltage decreasing circuit, the voltage decreasing circuit converts the first DC voltage to the second DC voltage which is provided to the panel computer.

11. The audio system of claim 10, wherein the charging unit comprises a first terminal and a second terminal;

the first terminal of the charging unit is electrically connected to the power signal output terminal to receive the first DC voltage;

the first terminal of the charging unit is electrically connected to the panel computer via the voltage decreasing circuit;

the second terminal of the charging unit is electrically connected to the switch unit;

the switch unit is grounded via the battery unit; and

the switch unit is electrically connected to the panel computer via the voltage decreasing circuit.

12. The audio system of claim 11, wherein the switch unit comprises a first terminal, a second terminal and a third terminal;

the second terminal of the charging unit is electrically connected to the first terminal of the switch unit;

the second terminal of the switch unit is grounded via the battery unit;

the third terminal of the switch unit is electrically connected to the first terminal of the charging unit;

the third terminal of the switch unit is electrically connected to a first terminal of the voltage decreasing circuit; and

a second terminal of the voltage decreasing circuit is configured for output the second DC voltage.

13. The audio system of claim 12, wherein the mainframe further comprises an audio signal negative output terminal;

the panel computer further comprises an audio signal negative input terminal;

the audio signal positive output terminal is configured to output the audio signal; and

the audio signal negative input terminal is electrically connected to the audio signal negative output terminal to receive the audio signal.

14. The audio system of claim 13, wherein the first DC voltage is +12V;

and the second DC voltage is +5V.

15. The audio system of claim 13, wherein panel computer is electrically connected to the mainframe by connecting lines or by inserting card and inserting slot.

16. The audio system of claim 13, wherein when the panel computer is attached to the system, the voltage decreasing circuit converts the first DC voltage to the second DC voltage, the second DC voltage is provided to the panel computer, the first terminal and the second terminal of the switch unit are electrically connected, the second terminal and the third terminal of the switch unit are disconnected, the first DC voltage charges the battery unit via the charging unit.

17. The audio system of claim 16, wherein when the panel computer is detached from the system, the first terminal and the second terminal of the switch unit are disconnected, the second terminal and the third terminal of the switch unit are electrically connected, the battery unit outputs the first DC voltage, the voltage decreasing circuit converts the first DC voltage to the second DC voltage, the second DC voltage is provided to the panel computer.

18. The audio system of claim 17, wherein the switch unit is a single-pole double throw switch.