Low voltage differential signal cable

• US 8,089,001 B2
• Filed: 07/06/2009
• Issued: 01/03/2012
• Est. Priority Date: 06/10/2009
• Status: Expired due to Fees

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Wang, Cheng-Sung
• Primary Examiner(s): MAYO III, WILLIAM H
• Application Number:
  US12/497,713
• Publication Number:
  US 20100314155A1
• Time in Patent Office: 911 Days
• Field of Search: 174/36, 174/110.R, 174/113.R, 174/102.R, 174/105.R, 174/108, 174/106.R
• US Class Current: 174/110.R
• CPC Class Codes: G09G 2330/06 Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
• CPC Class Codes: H01B 11/08 Screens specially adapted for reducing cross-talk
• CPC Class Codes: H01B 11/1091 with screen grounding means, e.g. drain wires

Abstract

A low voltage differential signal (LVDS) cable includes a cable body, a power wire, a number of twisted lines for signal transmission, and a number of ground bare wires. The power wire is arranged in a center of the cable body. The number of twisted lines for signal transmission is equidistantly arranged around the power wire. Each signal transmission twisted line includes a pair of differential signal wires and a ground bare wire. The pair of differential signal wires and the ground bare wire are twisted together to form a triple-twisted line. The number of the ground bare wires is equidistantly arranged around the number of twisted lines for signal transmission.

Claims

1. A low voltage differential signal (LVDS) cable, comprising:

a cable body;

at least one power wire arranged in a center of the cable body, insulation material is packaged around each of the at least one power wire;

a plurality of twisted lines for signal transmission equidistantly arranged around the at least one power wire, each of the plurality of twisted lines for signal transmission comprising a pair of differential signal wires and a ground bare wire, wherein the pair of differential signal wires and the ground bare wire of each of the plurality of twisted lines for signal transmission are twisted together to form a triple-twisted line, insulation material is packaged around each of the differential signal wires, a layer of material conductive on one side is packaged around each of the plurality of twisted lines for signal transmission, wherein the conductive side of the layer of material is attached to the signal transmission twisted lines; and

a plurality of ground bare wires equidistantly arranged around the plurality of twisted lines for signal transmission, a layer of material conductive on one side is packaged around the plurality of ground bare wires, wherein the conductive side of the layer of material is attached to the plurality of ground bare wires.

2. The LVDS cable of claim 1, wherein the number of the at least one power wire is two, the number of the plurality of twisted lines for signal transmission is four, and the number of the plurality of ground bare wires is nine.

3. The LVDS cable of claim 1, wherein a length of the cable body is about 360 mm±

10 mm.

4. The LVDS cable of claim 1, wherein an impedance of each of the plurality of twisted lines for signal transmission is about 100Ω

±

5Ω

.

5. The LVDS cable of claim 1, wherein a twist density of each of the plurality of twisted lines for signal transmission is about three sections per centimeter.

6. The LVDS cable of claim 1, wherein the layer of material conductive on one side packaged around each of the plurality of twisted lines for signal transmission includes aluminum foil arranged on the one side.

7. The LVDS signal cable of claim 6, wherein a thickness range of the layer of material conductive on one side packaged around each of the plurality of twisted lines for signal transmission is about 0.15 mm-0.3 mm, a surface resistance of the layer of material conductive on one side packaged around each of the plurality of twisted lines for signal transmission is less than or equal to 0.03Ω

.

8. The LVDS cable of claim 1, wherein the layer of material conductive on one side packaged around the plurality of ground bare wires is conductive fabric.

9. The LVDS cable of claim 8, wherein a thickness range of the conductive fabric is about 0.15 mm-0.3 mm, a surface resistance of the conductive fabric is less than or equal to 0.07Ω

.

10. The LVDS cable of claim 1, further comprising a first connector, and a second connector connected to the first connector via the cable body.

11. The LVDS cable of claim 10, wherein a layer of insulation fabric is packaged around the second connector and a part connecting the second connector of the cable body.

12. The LVDS cable of claim 10, wherein the second connector comprises a ground wire, a first end of the ground wire is connected to any one ground bare wire arranged in the cable body.

13. The LVDS cable of claim 12, wherein a ground ring is connected to a second end opposite to the first end of the ground wire.