CN203026769U - LVDS (low voltage differential signaling) cable applied to laptop - Google Patents

Abstract

The utility model provides an LVDS (low voltage differential signaling) cable applied to a laptop. The cable comprises an FFC (flexible flat cable) and a metal shell, wherein the FFC comprises an upper-layer insulating diaphragm, round copper wires and a lower-layer insulating diaphragm, wherein the round copper wires are arranged in parallel, and upper and lower surfaces of each round copper wire are respectively attached to the upper-layer insulating diaphragm and the lower-layer insulating diaphragm; two ends of the round copper wires are attached to reinforcing plates, and the round copper wires at two ends are pressed to be of flat structures, and are exposed outside; two ends of the FFC are stamped, the stamping structure at one end of the FFC is matched with a plate end connector, and the stamping structure at the other end of the FFC is matched with a plate end seat; and the structure of the metal shell is adaptive to the plate end seat, and the metal shell is arranged at one end of the stamping structure of the FFC matched with the plate end seat. The LVDS cable has the advantages of low cost, high production efficiency, long bending service life, controllable characteristic impedance, halogen-free requirement accordance, good shielding performance and the like.

Description

A kind of LVDS line that is applied to notebook computer

Technical field

The utility model relates to the holding wire technical field, relates in particular to a kind of LVDS(Low Voltage Differential Signaling that is applied to notebook computer, Low Voltage Differential Signal) line.

Background technology

Disclosing on the market at present three kinds of LVDS lines, is respectively FPC (but soft printed circuit board (PCB)), MIRCO COAXIAL CABLE(extremely thin coaxial wire MCC) and ELECTRONIC WIRE(electric wire) be widely used in the electric signal transmission of the electronic products such as notebook computer, LCD, LED.

The production process of existing ELECTRONIC WIRE LVDS line is: fit, cut, Hot bar, some glue beat end, slotting glue shell, mainly there is following shortcoming in this traditional structure:

1, cost is high: heart yearn is strands, and the materials processing cost is high, and the copper material that expends is many; Need to beat end, insert glue shell etc., complex process, cost of labor is high;

2, production efficiency is low: complex procedures, manual operation efficiency is low.

Summary of the invention

The purpose of this utility model is to provide a kind of LVDS line that is applied to notebook computer, reduces the existing operations such as end, slotting glue shell of beating, and reducing copper material expends, and reduces production costs and cost of labor;

Another purpose of the present utility model is to provide a kind of LVDS line that is applied to notebook computer, simplifies working process, and improves manual operation efficiency.

The purpose of this utility model is achieved through the following technical solutions:

A kind of LVDS line that is applied to notebook computer comprises FFC and metal-back;

Described FFC comprises upper strata insulating coating, circular copper wire, lower floor's insulating coating and stiffening plate; Described circular copper wire discharges side by side, and its upper and lower surface fits with upper strata insulating coating, lower floor's insulating coating respectively, and two ends lamination reinforcement plate, outside its two terminal circle copper cash is pressed into flat structure and is exposed to; The two ends punch die of described FFC, wherein the punch die structure of an end and plate terminal adapter are complementary, and the punch die structure of the other end and plate end stand are complementary;

Described metal-back, its structure and plate end stand are suitable, are installed on the punch die structure of FFC and the end that plate end stand is complementary.

Wherein, described metal-back comprises metal upper shell and metal lower shell; One end of described metal upper shell and metal lower shell is fixedly connected, the other end is provided with corresponding buckle and draw-in groove, and leaves the space of passing through for circular copper wire between metal upper shell and metal lower shell; Described circular copper wire exposes its exposed end after passing described space; The side of described metal upper shell and metal lower shell also is provided with the place of leaving a blank;

One end of metal-back is being installed, and described FFC upper trimming die has protruding end and female end, and protruding end is suitable with the place of leaving a blank, after buckle, draw-in groove fasten and female end suitable.

Wherein, the outer surface of described FFC posts characteristic impedance and controls material.

Wherein, the FFC that described outer surface posts characteristic impedance control material is divided into several, and the folding posterior cord of all itemizes is integral.

Wherein, described all itemizes are after bundle is integral, and its outside also is enclosed with EMI masking material and insulating material, and described EMI masking material is specially conductive fabric or acetic acid cloth.

Wherein, also leave between described wrapped itemize and rotate the space.

Wherein, described upper strata insulating coating, lower floor's insulating coating are the PET material.

Compared with prior art, the utility model embodiment has following beneficial effect:

1, has the Costco Wholesale advantage: need not to beat separately terminal, insert the glue head, expend copper material few; Operation is simple, and cost of labor is low.

2, production efficiency is high: simplified flow chart, production capacity significantly promotes.

3, flex life is long: because described FFC is also folded parcel strip shape by itemize, thereby not only can smoothly it be filled in undersized tubular space, and leave running clearance between itemize, be convenient to bending, by waving number of times more than 30000 times, without short breaking phenomena, conductor resistance rate of change＜3%.

4, characteristic impedance is controlled: in existing LVDS line, to be prone to lay not of uniform size for circular copper wire, causes the factors such as circular copper wire is loose in the course of processing and the influencing characterisitic resistance value, and normal condition can only reach 100 ± 20 Ω; And LVDS line of the present utility model is parallel lines structure, relies on the surface to stick on the special suction ripple of one deck material, reaches the purpose of control characteristic impedance, and its control range is accurate, stable, reaches 100 ± 10 Ω, further guarantees the stability of signal transmission;

5, screening performance is good: adopt double layer material control characteristic impedance and EMI, screening performance is splendid.

6, can meet Halogen-free requirement: existing LVDS line adopts the insulating barrier of PVC material, can't reach Halogen, and insulating barrier of the present utility model adopts the PET material, not only can reach RoHS, and can reach Halogen.

Description of drawings

Fig. 1 is the schematic diagram of the manufacturing procedure part one of LVDS line in the utility model embodiment.

Fig. 2 is the schematic diagram of the manufacturing procedure part two of LVDS line in the utility model embodiment.

Fig. 3 is the schematic diagram of the manufacturing procedure part three of LVDS line in the utility model embodiment.

Embodiment

The utility model is based on a kind of innovation of ELECTRONIC WIRE LVDS line, a kind of novel LVDS line of FFC that is applied to the notebook computer signal transmission, hereinafter to be referred as FFC-NB LVDS line (FLEXIBLE FLAT CABLE-NOTE BOOK LOW VOLTAGE DIFFERENTIAL SIGNALING).

In the utility model, the main feature of FFC-NB LVDS line is: 1. wire rod: heart yearn adopts the flat circular copper wire in two ends; 2. structure: adopt FFC weld metal shell structure; 3. itemize formula manufacturing process: with flat FFC itemize parcel, can replace the cabling of original LVDS line, simplification of flowsheet, bend resistance performance and antijamming capability are stronger, and be more stable than electric wire technique; 4. insulating material: use PET insulation material, not only can reach RoHS, also can reach Halogen, realize environmental protection.

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

In the present embodiment, FFC-NB LVDS line is comprised of FFC1 and metal-back 2.

See also Fig. 1, in the present embodiment, FFC1 is fit together by circular copper wire 11, upper strata insulating coating 12, lower floor's insulating coating 14 and stiffening plate 13 and forms.Flatten at the two ends of circular copper wire 11, as the golden finger end of conducting, is this product and the contacted position of connector.Upper strata insulating coating 12 and lower floor's insulating coating 14 play the effects such as protection conductor copper cash, insulation, anti-bending.The material of stiffening plate 13 plays for insulation PET, the two ends that are fitted in FFC1 the effect of supporting and being connected connection, and upper strata insulating coating 12 and lower floor's insulating coating were fitted with copper cash in 14 minutes up and down.The two ends punch die of FFC1, an end punching has protruding end 15 and recessed end 16, and other end punching has corner 17.

See also Fig. 2, metal-back 2 plays the effect of accepting motherboard connector, Display connector and FFC LVDS line, is comprised of metal upper shell and metal lower shell.Protruding end 15 is corresponding with the place 21 of leaving a blank, and protruding end 15 closely is connected with the place of leaving a blank 21 after metal-back 2 inserts FFC1.The lower buckle 22 of metal-back 2 and the upper buckle of metal-back are corresponding Shang Xia 23, and the recessed end 16 that fastens on rear and FFC1 matches.The copper cash of the flattening of FFC 1 is inserted after metal-back 2 expose the copper district in the afterbody exit 25 of metal-back 2 and press down metal upper shell and fasten, protruding end 15 and the place 21 of leaving a blank are coincide, lower buckle 22, upper buckle 23 and recessed end 16 match, and form buckle, prevent that FFC1 from skidding off.The corner 17 that the other end of FFC1 is made, similar with recessed end 16 effects to protruding end 15.Also be provided with the corresponding points 24 of connector on metal-back 2, be used for the contact-connection assembly for electric female seat, form tight screens with connector.

See also Fig. 3, after metal-back 2 is installed on the corresponding end of FFC1, FFC1 itemize, bunch, processing have just been obtained target product FFC-NB LVDS line.Wherein, the position 18 and 19 that itemize exposes is rugosity, needs outer subsides characteristic impedance to control material before itemize, plays the effect of control characteristic impedance.With insulating barrier, tundish is wrapped after having divided bar with FFC1 with the itemize machine, play protection, bend resistance, insulate and facilitate the effects such as cabling.3 is conductive fabric, and 4 is insulating tape, and effect is to cover EMI to disturb.Processing refers to post masking material etc. by technical indicator at assigned address.

The applying step of above-mentioned FFC-NB LVDS line comprises:

The first step: the two ends of circular copper wire 11 are flattened as the golden finger end, applying upper strata, two sides insulating coating 12 and lower floor's insulating coating 14, corresponding ports position lamination reinforcement plate 13 is made FFC1.

Second step: the two ends punch die with FFC1 is consistent with connector, and metal-back 2 is installed.

The 3rd step: FFC1 is needed part itemize and the bunch of cabling, bending, namely wrap up in the growth bar shaped with insulating material, material is controlled in outer subsides characteristic impedance.In the present embodiment, the position that itemize exposes is rugosity as shown in number in the figure 18 and 19.

The 4th step: paste EMI masking material and insulating tape 4 according to technical indicator, the EMI masking material comprises conductive fabric 3, aluminium foil etc.

The 5th step: with mainboard and Display connector in FFC-NB LVDS connection, realize connecting, complete the transmission of electric current or electric signal.

The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.

Claims (7)

1. a LVDS line that is applied to notebook computer, is characterized in that, this LVDS line comprises FFC and metal-back;

Described FFC comprises upper strata insulating coating, circular copper wire, lower floor's insulating coating and stiffening plate; Described circular copper wire discharges side by side, and its upper and lower surface fits with upper strata insulating coating, lower floor's insulating coating respectively, and two ends lamination reinforcement plate, outside its two terminal circle copper cash is pressed into flat structure and is exposed to; The two ends punch die of described FFC, wherein the punch die structure of an end and plate terminal adapter are complementary, and the punch die structure of the other end and plate end stand are complementary;

Described metal-back, its structure and plate end stand are suitable, are installed on the punch die structure of FFC and the end that plate end stand is complementary.

2. the LVDS line that is applied to notebook computer as claimed in claim 1, is characterized in that, described metal-back comprises metal upper shell and metal lower shell; One end of described metal upper shell and metal lower shell is fixedly connected, the other end is provided with corresponding buckle and draw-in groove, and leaves the space of passing through for circular copper wire between metal upper shell and metal lower shell; After passing described space, the part that flatten at described circular copper wire two ends exposes its exposed end; The side of described metal upper shell and metal lower shell also is provided with the place of leaving a blank;

One end of metal-back is being installed, and described FFC upper trimming die has protruding end and female end, and protruding end is suitable with the place of leaving a blank, after buckle, draw-in groove fasten and female end suitable.

3. the LVDS line that is applied to notebook computer as claimed in claim 1 or 2, is characterized in that, the outer surface of described FFC posts characteristic impedance and controls material.

4. the LVDS line that is applied to notebook computer as claimed in claim 3, is characterized in that, the FFC that described outer surface posts characteristic impedance control material is divided into several, and the folding posterior cord of all itemizes is integral.

5. the LVDS line that is applied to notebook computer as claimed in claim 4, is characterized in that, described all itemizes are after bundle is integral, and its outside also is enclosed with EMI masking material and insulating material, and described EMI masking material is specially conductive fabric or acetic acid cloth.

6. the LVDS line that is applied to notebook computer as claimed in claim 5, is characterized in that, also leaves between described wrapped itemize and rotate the space.

7. the LVDS line that is applied to notebook computer as claimed in claim 1, is characterized in that, described upper strata insulating coating, lower floor's insulating coating are the PET material.

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