CN2922071Y

CN2922071Y - Flexible soft creel

Info

Publication number: CN2922071Y
Application number: CNU2006200027132U
Authority: CN
Inventors: 何季贞
Original assignee: P Two Electronic Technology Suzhou Co Ltd; P Two Industries Inc
Current assignee: P Two Electronic Technology Suzhou Co Ltd; P Two Industries Inc
Priority date: 2006-01-07
Filing date: 2006-01-07
Publication date: 2007-07-11
Anticipated expiration: 2016-01-07

Abstract

The utility model relates to a flexible soft creel which is formed by lamination of a first insulation layer, a second conductive wire layer, a third insulation layer and a fourth shielding layer. The second conductive wire layer is provided with a plurality of spaced metal conductive wires, and the fourth shielding layer is made of metal material and provided with a plurality of hollowing parts with the same shape. Therefore the fourth shielding layer can shield the second conductive wire layer partially to make the metal shielding ratio to be 13 percent-60 percent for transmitting the LVDS signal and achieving functions of softness, fire resistance and cold-heat resistance.

Description

Bendable flexible flat cable

Technical field

The utility model provides a kind of bendable flexible flat cable, refers to that especially a kind of metal screening rate φ 13%～60% is applicable to the bendable flexible flat cable of LVDS.

Background technology

Employed signal coffret between LCD (LCD) and the system host board is that the Low Voltage Differential Signal receiver LVDS (LowVoltage Differential Signal) of employing ultrahigh speed, low-power consumption and low electromagnetic characteristic is the signal coffret at present; Therefore according to the LVDS interface standard of ANSI/TIA/EIA-644-1995 definition, be applied to the LVDS signal transmission line specification between LCD interface and the system host plate interface, must possess 100 Ω characteristic impedances (Characteristic Impedance), the side must be complementary with the circuit impedance of LCD interface and system host plate interface.

In other words, be applicable to the signal transmission line (Transmission Line) between LCD interface and the system host plate interface, the specification that must possess 100 Ω characteristic impedances, for example, must use traditional connecting line (Wire Cable) of specification 100 Ω characteristic impedances, flexible printed wiring board (FPC, Flexible Printed Circuit) or mini coaxial cable (Mini Coaxial Cable) etc., could instruct by the correct execution transmission signal, reduce electromagnetic interference (EMI), reduce noise (noise) and disturb and avoid malfunction, disturb otherwise will produce signal reflex and noise (noise), and cause the loss of signal, distortion and distortion.

Fig. 1 is for commonly using flexible flat cable (FFC, Flexible Flat Cable) side cutaway view, the flexible flat cable of commonly using 1 is to constitute by 13 of upper strata PET insulating barrier 11, electric wire layer 12 and the PET of lower floor insulating barriers are stacking, the material of this upper strata PET insulating barrier 11 and the PET of lower floor insulating barrier 13 is to be coated with special saturated polyester resin and to be made by the PET film, the hot pressing of process machine is to be coated on electric wire layer 12 middle and to constitute one, so have processing procedure advantage easy and cheap for manufacturing cost, and have softness, anti-combustion, cold-resistant thermal property again; But it is, therefore inapplicable as the signal transmission line between LCD interface and the system host plate interface because the characteristic impedance value of commonly using flexible flat cable approximately all about 130 Ω, does not meet the service regeulations standard of LVDS signal transmission line.

Be with, how solve the above problems and lack, be the relevant manufacturer that is engaged in the industry and desire most ardently the direction place that research improves.

Summary of the invention

The purpose of this utility model is in that a kind of bendable flexible flat cable is provided, and by improvement of the present utility model, can make flexible flat cable meet the characteristic impedance value of LVDS, and have the effect of softness, anti-combustion and cold-resistant heat.

For realizing the described purpose in prostatitis, the utility model adopts following technical proposals: this bendable flexible flat cable, be by first insulating barrier, the second electric wire layer, the 3rd insulating barrier and the 4th screen institute is stacking constitutes, it is characterized in that: this second electric wire layer has several spaced metallic conduction wire rods, and the 4th shielding series of strata are made of metal material and form the identical shaped hollow-out parts of plural number, and the 4th screen maskable is in the second electric wire layer, and makes that metal screening rate φ is 13%～60%.

Compare with conventional art and the utlity model has following beneficial effect: can be provided as LVDS signal transmission line usefulness, and have the effect of softness, anti-combustion and cold-resistant heat.

Description of drawings

Fig. 1 is the side cutaway view of commonly using.

Fig. 2 is a stereo appearance figure of the present utility model.

Fig. 3 is a side cutaway view of the present utility model.

Fig. 4 is the embodiment schematic diagram of the hollow-out parts of the utility model the 4th screen

The figure number explanation

1, flexible flat cable

11, PET insulating barrier 12, electric wire layer

13, PET insulating barrier

2, bendable flexible flat cable

21, first insulating barrier 22, the second electric wire layer

221, electric wire

23, the 3rd insulating barrier 24, the 4th screen

241, hollow-out parts

Embodiment

For reaching above-mentioned purpose and effect, technological means that the utility model adopted and structure thereof, the existing drawing illustrates in detail that with regard to preferred embodiment of the present utility model its feature and function are as follows, so that understanding fully.

Fig. 2, Fig. 3 are respectively stereo appearance figure of the present utility model, side cutaway view, find out by knowing among the figure, bendable flexible flat cable 2 of the present utility model is to constitute by 24 of first insulating barrier 21, the second electric wire layer 22, the 3rd insulating barrier 22 and the 4th screens are stacking, thus with regard to the primary structure feature of this case describe in detail as after; Wherein:

It is material that this first insulating barrier 21 and the 3rd insulating barrier 23 all are coated with special saturated polyester resin with the PET film, and the second electric wire layer 22 has several tin-coated copper electric wires 221 to be arranged side by side at interval, can be used to transmission signal, and the 4th screen 24 is to be constituted and formed the identical shaped hollow-out parts 241 of plural number by metal material; Therefore the tin-coated copper electric wire 221 of the second electric wire layer 22 can part be covered by the 4th screen 24, and makes that metal screening rate φ is 13%～60%, and can meet the use specification requirement of LVDS signal transmission line.

Fig. 4 is the embodiment schematic diagram of the hollow-out parts of the 4th screen, find out by knowing among the figure, the hollow-out parts 241 of the 4th screen 24 can be different shapes such as circle, ellipse, square, rhombus, polygon, and the metal material of the 4th screen 24 is made up of metals such as silver slurry, silver-colored carbon slurry, silver foil, aluminium paste, aluminium foil, Copper Foil and metallic composite thereof.

Be with, the utility model is that may command is shielded in the situation of covering of the second electric wire layer 22 by hollow-out parts 241 numbers of the 4th shielding layer 24, and then may command metal screening rate φ is 13%～60%, make bendable flexible flat cable 2 meet the use specification requirement of LVDS signal transmission line, and the signal transmission line that can be used as LVDS uses, and can reach the effect of softness, anti-combustion and cold-resistant heat.

Above-mentioned detailed description is at a kind of preferable possible embodiments explanation of the utility model, but this embodiment is not in order to limit claim of the present utility model, all other do not break away from the equalization of being finished under the skill spirit that the utility model discloses to be changed and modifies change, all should be contained in the claim that the utility model contains.

In sum, bendable flexible flat cable of the present utility model has obvious effect when using promotes, and really meets the patent requirement of novelty, utility model and progressive, and filing an application in the whence in accordance with the law, expects early to grant a patent.

Claims

1, a kind of bendable flexible flat cable, be by first insulating barrier, the second electric wire layer, the 3rd insulating barrier and the 4th screen institute is stacking constitutes, it is characterized in that: this second electric wire layer has several spaced metallic conduction wire rods, and the 4th shielding series of strata are made of metal material and form the identical shaped hollow-out parts of plural number, and the 4th screen maskable is in the second electric wire layer, and makes that metal screening rate φ is 13%～60%.

2, bendable flexible flat cable as claimed in claim 1 is characterized in that: this first insulating barrier and the 3rd insulation series of strata are material with PET film coating saturated polyester resin.

3, bendable flexible flat cable as claimed in claim 1 is characterized in that: the metal material system of the 4th screen is made up of silver slurry, silver-colored carbon slurry, silver foil, aluminium paste, aluminium foil, Copper Foil and metallic composite thereof.

4, bendable flexible flat cable as claimed in claim 1 is characterized in that: the hollow-out parts of the 4th screen is circle, semicircle, ellipse, square, rectangle, rhombus, polygon.