COMMUNICATION DEVICE, POWER SUPPLYING METHOD THEREFOR, AND POWER SUPPLY SYSTEM

• US 20110310519A1
• Filed: 06/15/2011
• Published: 12/22/2011
• Est. Priority Date: 06/17/2010
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: BABA, Masanori, YAMAGUCHI, Tsuyoshi, TOKUNAGA, Yoshimi, OOISHI, Mutsuhiko
• Granted Patent: US 8,724,277 B2
• Time in Patent Office: Days
• US Class Current: 361/91.1
• CPC Class Codes: H02J 1/06 Two-wire systems
• CPC Class Codes: H04L 12/10 Current supply arrangements
• CPC Class Codes: H04N 5/63 Generation or supply of power specially adapted for television receivers

Abstract

A communication device that establishes a communication with another communication device and supplies electric power to the other communication device by way of a transmission channel, the device comprises a supply voltage generation section that generates a supply voltage, a first detection section that detects a connection of an electric device other than the other communication device to the transmission channel, and an output control section that controls .a supply of electric power to the other communication device, wherein the output control section supplies no power to the other communication device when the first detection section detects the connection of the electric device

Claims

1. A communication device that establishes a communication with another communication device and supplies electric power to the other communication device by way of a transmission channel, the device comprising:

a voltage generation section that generates a supply voltage;

a first detection section that detects a connection of an electric device other than the other communication device to the transmission channel; and

an output control section that controls a supply of electric power to the other communication device, wherein

the output control section supplies no power to the other communication device when the first detection section detects the connection of the electric device.

2. The communication device according to claim 1, further comprising:

a control section that controls the communication device, wherein the output control section supplies a first voltage generated by the voltage generation section to the other communication device when the first detection section does not detect the connection of the electric device; and

wherein the output control section supplies a second voltage generated by the voltage generation section to the other communication device when the control section authenticate the other communication device.

3. The communication device according to claim 1, further comprising:

a second detection section, wherein the output control section stops a power supply to the other communication device when the second detection section detects an over-current during a power supply.

4. The communication device according to claim 1, further comprising:

a third detection section, wherein the output control section stops a power supply to the other communication device when the third detection section detects an over-voltage during a power supply.

5. The communication device according to claim 1, further comprising:

a fourth detection section, wherein the voltage generation section stops generating of a supply voltage when the fourth detection section detects a critical voltage during a power supply.

6. A power supplying method for use with a communication device that establishes a communication with another communication device and supplies electric power to the other communication device by way of a transmission channel, the method comprising:

detecting a connection of an electric device other than the other communication device to the transmission channel; and

supplying no power to the other communication device when there is a connection of the other electric device to the transmission channel.

7. The power supplying method according to claim 6, further comprising:

supplying a first voltage to the other communication device when the other communication device is not connected to the transmission channel;

authenticating the other communication device; and

supplying a second voltage to the other communication device after completion of authentication of the other communication device.

8. The power supplying method according to claim 7, wherein supplying the first voltage to the other communication device is stopped when authentication of the other communication device is not completed.

9. The power supplying method according to claim 7, further comprising:

monitoring occurrence of a critical voltage in a power supply side after commencing to supply the first voltage to the other communication device; and

stopping operation of the power supply side when the critical voltage is detected.

10. The power supplying method according to claim 7, further comprising:

monitoring occurrence of an over-voltage in a power supply side after commencing to supply the first voltage to the other communication device; and

stopping the power supply to the other communication device when the over-voltage is detected.

11. The power supplying method according to claim 7, further comprising:

monitoring occurrence of an over-current in the transmission channel after commencing to supply the first voltage to the other communication device; and

stopping the power supply to the other communication device when the over-current is detected.

12. A power supply system including:

a first communication device capable of establishing a communication with a first electric device; and

a second communication device capable of establishing a communication with a second electric device by way of a first transmission channel, the first communication device establishing a communication with the second communication device and supplying electric power to the second communication device by way of a second transmission channel, wherein

the first communication device stops a power supply to the second communication device when the first communication device detects an electric device other than the second communication device in the second transmission channel.

13. The power supply system according to claim 12, wherein the first communication device supplies electric power to the second communication device by way of the second transmission channel;

and wherein

the second communication device supplies electric power to the second electric device by way of the first transmission channel,