POWER LINE TRANSMISSION APPARATUS WITHOUT PUBLIC POWER SYSTEM NOISE INTERFERENCE AND METHOD THEREOF

• US 20110051818A1
• Filed: 12/23/2009
• Published: 03/03/2011
• Est. Priority Date: 08/31/2009
• Status: Active Grant

• Current Assignee: Powertech Industrial Company Limited
• Original Assignee: Powertech Industrial Company Limited
• Inventors: LEE, YU-LUNG, KUO, MING-CHOU
• Granted Patent: US 8,692,407 B2
• Time in Patent Office: Days
• US Class Current: 375/254
• CPC Class Codes: H04B 2203/545 Audio/video application, e.g. interphone
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04B 3/56 Circuits for coupling, blocking, or by-passing of signals

Abstract

A power line transmission apparatus is not interfered by the noise of the public power for transmitting high quality video/audio signal. The power line transmission apparatus includes an isolating unit connected between an external power line and an internal power line for isolating a high frequency noise signal carried on the external power line and transmitting a first power signal of the external power line from the external power line to the internal power line, and a power line network interface. The power line network interface includes at least one digital signal input/output interface for inputting or outputting a digital signal, converting the digital signal, and modulating the converted signal into the first power signal to form a second power signal and transmit the second power signal to the internal power line. A home network system without noise signal interference is built by utilizing several power line transmission apparatuses.

Claims

1. A power line transmission apparatus, comprising:

an isolating unit connected between an external power line and an internal power line in serial for isolating a high frequency noise signal transmitted on the external power line out and transmitting a first power signal carried on the external power line to the internal power line; and

a power line network interface, wherein the power line network interface includes at least one digital signal input/output interface for inputting or outputting a digital signal, converting the digital signal and modulating the digital signal into the first power signal to generate a second power signal, and transmit the second power signal to the internal power line.

2. The power line transmission apparatus as claimed in claim 1, wherein the apparatus further comprises a surge protection unit connected between the isolating unit and the external power line for filtering surge signals.

3. The power line transmission apparatus as claimed in claim 1, wherein the power line network interface further comprises at least one digital signal input/output interface for inputting or outputting a video signal or an audio signal.

4. The power line transmission apparatus as claimed in claim 1, wherein the isolating unit is configured by at least one inductor or at least one filtering circuit.

5. The power line transmission apparatus as claimed in claim 1, wherein the isolating unit is designed to allow the first power signal about 60 Hz in frequency to pass by.

6. The power line transmission apparatus as claimed in claim 1, wherein the isolating unit isolates the noise signal with frequency over than or equal to 1 MHz.

7. A home network system, comprising:

a first power line transmission apparatus electrically connected with an external power line; and

a second power line transmission apparatus electrically connected with the first power line transmission apparatus via an internal power line;

whereby the first power line transmission apparatus isolates a high frequency noise signal transmitted through the external power line out, transmits a first power signal associated with the external power line to the internal power line, receives and converts a digital signal, and consequently, modulates the digital signal converted to the first power signal so as to generate a second power signal and transmit the second power signal to the internal power line;

whereby the second power line transmission apparatus receives the second power signal, recovers the digital signal so as to output the digital signal, and isolates the modulated digital signal and the high frequency noise signal out of the second power signal to recover and output the first power signal.

8. The home network system as claimed in claim 7, wherein the first power line transmission apparatus and the second power line transmission apparatus further comprise a surge protection unit for filtering out a surge signal respectively.

9. The home network system as claimed in claim 7, wherein the first power line transmission apparatus and the second power line transmission apparatus further and respectively comprise:

an isolating unit, for isolating a high frequency noise signal out and allowing the first power signal to pass by; and

a power line network interface, wherein the power line network interface includes at least one digital signal input/output interface for inputting or outputting a digital signal, converting the digital signal and modulating the digital signal into the first power signal so as to generate a second power signal, or recover the digital signal from the second power signal.

10. The home network system as claimed in claim 9, wherein the digital signal input/output interface is provided for inputting or outputting a video signal or an audio signal.

11. The home network system as claimed in claim 7, wherein the isolating unit is configured by at least one inductor or at least one filtering circuit.

12. The home network system as claimed in claim 7, wherein the isolating unit is designed to allow the first power signal about 60 Hz in frequency to pass by.

13. The home network system as claimed in claim 7, wherein the isolating unit isolates the noise signal with frequency over than or equal to 1 MHz.

14. A power line transmission method, comprising:

providing an external power line and an internal power line;

providing a first power line transmission apparatus, wherein the first power line transmission apparatus is electrically connected with the external power line for receiving a digital signal and a first power signal transmitted through the external power line, isolating a noise signal of the external power line, and converting and modulating the digital signal to the first power signal so as to generate a second power signal which is transmitted onto the internal power line; and

providing a second power line transmission apparatus electrically connected with the internal power line so as to receive the second power signal, recover the digital signal back from the second power signal for outputting the digital signal, and isolate a noise signal transmitted on the internal power line to recover the first power signal for outputting the first power signal.

15. The power line transmission method as claimed in claim 14, wherein the first power line transmission apparatus and the second power line transmission apparatus further comprise a surge protection unit for filtering a surge signal respectively.

16. The power line transmission method as claimed in claim 14, wherein the first power line transmission apparatus and the second power line transmission apparatus further and respectively comprise:

an isolating unit, for isolating a high frequency noise signal out and allowing the first power signal to pass by; and

a power line network interface, wherein the power line network interface includes at least one digital signal input/output interface for inputting or outputting a digital signal, converting the digital signal and modulating the digital signal into the first power signal so as to generate a second power signal, or recover the digital signal from the second power signal.

17. The power line transmission method as claimed in claim 16, wherein the digital signal input/output interface is provided for inputting or outputting a video signal or an audio signal.

18. The power line transmission method as claimed in claim 14, wherein the isolating unit is configured by at least one inductor or at least one filtering circuit.

19. The power line transmission method as claimed in claim 14, wherein the isolating unit is designed to allow the first power signal about 60 Hz in frequency to pass by.

20. The power line transmission method as claimed in claim 14, wherein the isolating unit isolates the noise signal with frequency over than or equal to 1 MHz.