Coil wire for suppressing electromagnetic interference

• US 6,703,558 B2
• Filed: 10/10/2001
• Issued: 03/09/2004
• Est. Priority Date: 10/13/2000
• Status: Expired due to Term

• Current Assignee: Acer, Inc., Wistron Corporation
• Original Assignee: Acer, Inc.
• Inventors: Uang, Muh-Jin
• Primary Examiner(s): Mayo, III, William H.
• Application Number:
  US09/972,852
• Publication Number:
  US 20020043387A1
• Time in Patent Office: 881 Days
• Field of Search: 174/102.R, 174/103, 174/106.R, 174/108, 174/36, 333/12, 333/181, 340/310
• US Class Current: 174/36
• CPC Class Codes: H01B 11/06 with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
• CPC Class Codes: H01B 11/16 Cables, e.g. submarine cables, with coils or other devices incorporated during cable manufacture
• CPC Class Codes: H01R 13/719 specially adapted for high frequency, e.g. with filters

Abstract

A connecting cable for bridging a computer host and a peripheral device including a signal line for data transmission and a power cable. A portion of the power cable is wrapped around the signal line to form the coil wire. Therefore, rapid noise variation of a braided wire on the signal line can pass the coil wire to induce a rapid change of magnetic flux and then further to generate a reverse induced current for eliminating the noise intensity on the power cable.

Claims

1. A power cable, comprising a first end adapted to connect to a power plug and a second end adapted to connect to a signal line of a connecting cable, wherein a portion of the power cable comprises a coil wire that wraps the signal line for providing the connecting cable with a performance to suppress electromagnetic interference.

2. The power cable according to claim 1, further comprising a splitter for fixing said coil wire to said signal line.

3. The power cable according to claim 1, further comprising a conductive cloth for covering the second end of said power cable to said signal line.

4. The power cable according to claim 1, wherein said signal line is a high-frequency signal line.

5. The power cable according to claim 1, wherein said power cable is a DC power cable.

6. The power cable according to claim 1, wherein said performance is dependent upon the coil number of said coil wire.

7. The power cable according to claim 1, wherein said performance is to suppress a high-frequency noise with a frequency higher than 500 MHz.

8. The power cable according to claim 1, wherein said coil wire wraps said signal line by a rectangular wiring pattern.

9. An LCD cable for suppressing electromagnetic interference, bridging a computer host and an LCD, including a splitter to bifurcate the LCD cable into two lines, comprising:

a signal line for data transmission, having thereof an end for connection with a peripheral device and another end for connection with a power cable at the splitter and for further connection to the computer host; and

a power cable, being a DC power cable, having thereof one end for connection with the signal line at the splitter and another end formed as a DC plug;

wherein the power cable wraps the signal line at the splitter to from a coil wire so as to reduce noise intensity on the power cable, thus, for achieving a performance of suppressing electromagnetic interference.

10. The LCD cable for suppressing electromagnetic interference according to claim 9, further includes a braided wire wrapping said signal line for shielding said signal line from noises.

11. The LCD cable for suppressing electromagnetic interference according to claim 9, further includes a thin wire wrapping said signal line for performing as a ground loop.

12. The LCD cable for suppressing electromagnetic interference according to claim 9, wherein said splitter fixes said coil wire of said power cable to said signal line.

13. The LCD cable for suppressing electromagnetic interference according to claim 9, further includes a conductive cloth for covering a portion of said power cable after coil wiring to said signal line.

14. The LCD cable for suppressing electromagnetic interference according to claim 9, wherein said signal line is a high-frequency signal line and said LCD cable is capable to suppress high-frequency noises.

15. The LCD cable for suppressing electromagnetic interference according to claim 9, wherein said power cable is a DC power cable.

16. The LCD cable for suppressing electromagnetic interference according to claim 9, wherein said performance is dependent upon the coil number of said coil wire.

17. The LCD cable for suppressing electromagnetic interference according to claim 9, wherein said performance is to suppress a high-frequency noise with a frequency higher than 500 MHz.

18. The LCD cable for suppressing electromagnetic interference according to claim 9, wherein said power cable wraps said signal line by a rectangular wiring pattern.