EP2034491B1 - Ligne de données électrique, très flexible et blindée - Google Patents

Ligne de données électrique, très flexible et blindée Download PDF

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Publication number
EP2034491B1
EP2034491B1 EP08012284.9A EP08012284A EP2034491B1 EP 2034491 B1 EP2034491 B1 EP 2034491B1 EP 08012284 A EP08012284 A EP 08012284A EP 2034491 B1 EP2034491 B1 EP 2034491B1
Authority
EP
European Patent Office
Prior art keywords
electrical line
line according
subsequent
woven fabric
wires
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08012284.9A
Other languages
German (de)
English (en)
Other versions
EP2034491A2 (fr
EP2034491A3 (fr
EP2034491B9 (fr
Inventor
Wolfgang Dlugas
Lothar Kundinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEW Kabel GmbH and Co KG
Original Assignee
HEW Kabel GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HEW Kabel GmbH and Co KG filed Critical HEW Kabel GmbH and Co KG
Publication of EP2034491A2 publication Critical patent/EP2034491A2/fr
Publication of EP2034491A3 publication Critical patent/EP2034491A3/fr
Publication of EP2034491B1 publication Critical patent/EP2034491B1/fr
Application granted granted Critical
Publication of EP2034491B9 publication Critical patent/EP2034491B9/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1008—Features relating to screening tape per se
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables

Definitions

  • the present invention relates to a highly flexible shielded electrical line for high-frequency data transmission in pivotable screens, in particular for pivotable LCD (liquid crystal display) devices, with two wires for power and / or at least two data wires.
  • pivotable LCD liquid crystal display
  • the document EP 1 768 133 A2 discloses a highly flexible shielded line for high frequency data transmission in pivotable screens.
  • the present invention is therefore based on the object of providing a data line for the described pivotable screens, which with high flexibility and largely independent of the prevailing ambient temperatures, the function of the screens with optimized quality of the data signals, the data reception even for high data rates in areas of e.g. 800 Mbit / sec and more guaranteed.
  • This object is achieved according to the invention, characterized in that the stranded and / or bundled or combined into pairs cores are enclosed in total by a shield of uninsulated metallic wires, which is covered to the outside by a conductive fiber fleece, the surface electrically contacted the shield, and that the nonwoven cover is finally enclosed by an outer shell of a silicone rubber.
  • This structure of an electrical data line ensures the pivotability of a screen in any direction even under permafrost conditions with simultaneous undisturbed data transmission at a high data rate of 800 or 1000 MHz and above.
  • a connected to a line according to the invention screen can therefore be folded without affecting the quality of transmission of the respective data forward or backward, rotated in one or the other direction or pivoted or pulled in the direction of the viewer or moved away from it again.
  • the conductive nonwoven fabric according to the invention may be a nonwoven material impregnated with conductive materials, but also a nonwoven material impregnated with metal threads.
  • a preferred variant of the invention results when the conductive nonwoven fabric is a metal-coated plastic nonwoven, wherein the coating is preferably carried out by a vapor deposition of the plastic nonwoven, by a vapor deposition, for example with aluminum or silver or with their alloys.
  • the stranded and / or bundled or combined in pairs cores are held together in total by a arranged below the wire mesh insulating fiber fleece.
  • This insulating nonwoven fabric leads to a further reduction of the friction losses in the line structure and thus to increase the flexibility of the electrical line according to the invention.
  • the conductive nonwoven fabric according to the invention contributes to increase the transmission frequencies also in that the insulation of the data wires is constructed in two layers, with an inner winding of the conductor of a stretched and sintered porous tape or a film of a non-melt processable from the melt fluoropolymer and an outer closed layer of a melt processable fluoropolymer.
  • the melt non-processable fluoropolymer is most preferably a polytetrafluoroethylene, the term polytetrafluoroethylene also including tetrafluoroethylene polymers provided with modifying additives, but in such an amount that the polymer, such as the polytetrafluoroethylene itself, does not melt is processable.
  • This embodiment of the invention not only has the high flexibility in dynamic laying over a wide temperature range between -50 ° C and + 180 ° C, it is also easily suitable for a transmission frequency over 800 and 1000 MHz with a screen attenuation greater than 65dB.
  • a further improvement of this data line results when, in a continuation of the invention, the PTFE (polytetrafluoroethylene) winding of the conductor carries a layer of a melt-processable fluoropolymer, which is frictionally connected to at least the uppermost band or film layer. Since the ratio of the wall thicknesses of the tape or film winding to the frictionally connected layer in the practice of the invention is 3: 1, this layer is merely to be regarded as a skin layer covering the winding.
  • the tetrafluoroethylene / hexafluoropropylene copolymer (FEP), the perfluoroalkoxy polymer (PFA) or else the tetrafluoroethylene-perfluoroalkylvinyl ether copolymer (TFA / PFA) have proven to be suitable for this skin layer.
  • FEP tetrafluoroethylene / hexafluoropropylene copolymer
  • PFA perfluoroalkoxy polymer
  • TFA tetrafluoroethylene-perfluoroalkylvinyl ether copolymer
  • other known melt-processable fluoropolymers can sometimes find a beneficial application.
  • a particularly advantageous embodiment of the invention results when, in addition to the individual wires provided for data transmission, additional wires for the power supply are arranged in the line construction.
  • additional wires for the power supply are arranged in the line construction.
  • Such a power supply for example, require the adjusting motors on swivel displays or the drive motors for mirror adjustments in or on motor vehicles.
  • the electrical, the feed current leading conductors of these wires expediently carry insulation from a processable from the melt fluoropolymer.
  • the wires for the power supply and the data wires have the same or almost the same diameter. This makes it easy to unify all the wires simultaneously to form a single stranded bandage. This ensures that all cores have the same bending behavior under bending stresses. If a central filling strand, a so-called bridle, is required for rounding the core consisting of the stranded cores, then it has proven to be especially expedient to produce the filler strand from a stretched and sintered polytetrafluoroethylene (PTFE) strand molding.
  • the molded strand is advantageously made of a twisted to a strand band of PTFE. The advantage of such a molded strand is its high cold flexibility and the lack of material abrasion, which, as in the case of glass silk tents, easily leads to contamination of the electronic components in the pivotable LCD devices.
  • the invention is on hand in the Fig. 1 to 3 explained as embodiments data lines explained in more detail.
  • the electrical leads described here are suitable for low voltage / high speed data transmission over copper wires (LVDS) due to their particular characteristics.
  • the Fig.1 shows a single-pair shielded, highly flexible data line for an EMC optimized transmission of data (LVDS-interface) with extremely high bending flexibility over a wide temperature range, as in particular can be used advantageously in the automotive technology for the connection of swivel screens.
  • LVDS-interface EMC optimized transmission of data
  • the copper conductors 1 are insulated with a diameter of, for example, 0.50 mm with a winding 2 of a stretched and sintered tape or a corresponding sheet of polytetrafluoroethylene (PTFE), or the known under the trade name HEI-tape® the applicant ,
  • the winding 2 of the PTFE tape carries a skin layer 3 made of a melt processable fluoropolymer, for example, a tetrafluoroethylene / hexafluoropropylene copolymer (FEP).
  • Fill strands 4 in the interstices of the stranded individual cores serve to stabilize the stranding, they can be made of a suitable plastic, but also consist of glass fibers.
  • the stranding 5 having said individual elements is enclosed by the bandage 6 made of an insulating fiber fleece.
  • An existing of tinned copper wires screen braid is denoted by 7, it is covered by the band 8 of a one or both sides with aluminum or silver steamed fiber fleece.
  • the outer envelope of the data line according to the invention forms the jacket 9 of a H exertvulkan byden (HTV) silicone rubber.
  • the outer diameter of this constructed according to the invention data line is about 4.5 mm, the operating voltage according to their use in automotive technology 48V.
  • an embodiment of the invention according to the Fig. 2 use.
  • the electrical conductors 12 of the pairs 10 with an outer diameter of, for example, 0.6 mm in this embodiment consist of bare, tinned or silver-plated copper wires.
  • the insulation 13 of the conductor 12 consists of a melt-processable above-mentioned fluoropolymer, for example, an FEP.
  • the all four pairs together comprehensive banding 14 may consist of a Folienbewicklung of a polyester tape, according to the embodiment of the Fig.1 but can also take over the task of banding with advantage an insulating, friction-reducing fiber fleece.
  • the shielding of the data line is made of tinned or silver-plated copper wires existing mesh 15, which in turn is surrounded to improve the shielding effect and thus to optimize the data transfer from the banding 16 of a metallized nonwoven fabric.
  • the data line according to the invention through the jacket 17, for example, from a HTV silicone rubber or LSR rubber.
  • the uniformly flexible even at low temperatures silicone rubber sheath ensures here in connection with the described elements of the data line their high bending ability, which allows a dynamic Verlegungsart swivel orrackziebaren from drawers or covers screens.
  • the outer diameter is about 6.0 to 6.5 mm, the operating voltage is also 48V.
  • Fig. 3 a particularly advantageous embodiment of the invention, in which the two provided for data transmission single cores 18 and 19 and the two at least approximately the same diameter as these having cores 20 and 21, which serve the power supply, for example, servomotors with pivotable screens, are stranded together. Since the wires 20 and 21 are not used for data transmission, their electrical conductors 22 and 23 are provided only with an insulation 24 or 25 made of a melt-processable fluoropolymer, for example from a FEP. For data transmission, on the other hand, insulation with a low dielectric constant, for example in the order of magnitude of 1.3, is important.
  • the conductors 26 and 27 of the individual wires 18 and 19 are first insulated with a winding 28 or 29 from a stretched and sintered band or from a corresponding film of polytetrafluoroethylene.
  • These tape or film windings are each covered by insulating layers 30 and 31 of a meltable fluoropolymer, in the illustrated embodiment of the above-mentioned FEP.
  • the bridle 33 In the center of the stranding 32 formed from the wires 18, 19, 20 and 21 of the Grestrang (the bridle) 33 is arranged.
  • this conduit consists of a strand twisted, stretched and sintered, i. porous, tape made of PTFE.
  • the use of this material has in addition to the high cold flexibility of Drstranges invention the advantage that contamination by material removal due to the performed during operation of the line movements of the connected pivoting devices are avoided.
  • the stranded bandage 32 having said strands is surrounded by the banding 34 made of an insulating nonwoven fabric within which the stranding bandage 32 is performed extremely low friction. If, as shown, the insulating fiber fleece covered by the braid 35, for example, tinned copper wires, then the braid 35 can be easily moved over the stranding 32 in the axial direction for mounting purposes, but the insulating fiber fleece also contributes to increase the flexibility of the entire line.
  • the banding 36 is arranged to improve the shielding effect and to optimize the data transfer from a one or both sides coated with a metal, advantageously steamed fiber fleece.
  • the metals used are preferably aluminum, silver or other conductive materials suitable for the coating process.
  • the outer envelope of this line according to the invention is formed by the jacket 37 made of a silicone rubber.
  • the outer diameter of this data line according to the invention is about 4.8 mm, the operating voltage is according to their use in automotive technology at 48V.
  • the particular advantage of this line according to the invention is the problem-free use in a temperature range of about -50 ° C to + 135 ° C and above while maintaining high flexibility and undisturbed data transmission with a data rate of about 800 or 1000 Mbit / sec.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
  • Organic Insulating Materials (AREA)

Claims (22)

  1. Ligne électrique blindée, hautement flexible, pour la transmission de données haute fréquence pour des écrans pivotants, en particulier des équipements LCD pivotants, avec deux brins (20, 21) pour l'alimentation électrique et/ou au moins deux brins de données (1, 12, 18, 19),
    caractérisée en ce que les brins torsadés et/ou toronnés ou appariés (10) sont entourés globalement par un blindage (7, 15, 35) de fils métalliques non isolés recouverts à l'extérieur d'un non-tissé conducteur (8, 16, 36) en contact électrique avec le blindage sur toute la surface, et en ce que ce recouvrement conducteur en non-tissé est enfin entouré par une gaine extérieure (9, 17, 37) en caoutchouc silicone.
  2. Ligne électrique selon la revendication 1, caractérisée en ce que le non-tissé conducteur (8, 16, 36) est un film synthétique imprégné de substances conductrices.
  3. Ligne électrique selon la revendication 1, caractérisée en ce que le non-tissé conducteur (8, 16, 36) est un film synthétique tissé avec des fils métalliques.
  4. Ligne électrique selon la revendication 1, caractérisée en ce que le non-tissé conducteur (8, 16, 36) est un film synthétique recouvert de métal.
  5. Ligne électrique selon la revendication 4, caractérisée en ce que le non-tissé conducteur (8, 16, 36) est un film synthétique (8, 16, 36) métallisé d'un ou des deux côtés.
  6. Ligne électrique selon la revendication 3 ou l'une des suivantes, caractérisée en ce que le métal est de l'aluminium ou un alliage d'aluminium.
  7. Ligne électrique selon la revendication 3 ou l'une des suivantes, caractérisée en ce que le métal est de l'argent ou un alliage d'argent.
  8. Ligne électrique selon la revendication 1 ou l'une des suivantes, caractérisée en ce que le recouvrement en non-tissé conducteur extérieur (8, 16, 36) du blindage (7, 15, 35) se compose d'une bande enroulée du non-tissé conducteur.
  9. Ligne électrique selon la revendication 1 ou l'une des suivantes, caractérisée en ce que les brins torsadés et/ou toronnés ou appariés (10) sont globalement maintenus ensemble par un non-tissé isolant (6, 14, 34) disposé au-dessous du treillis en fils métalliques.
  10. Ligne électrique selon la revendication 1 ou l'une des suivantes, caractérisée en ce que l'isolation des brins de fil métallique est réalisée en deux couches, avec un enroulement intérieur du conducteur composé d'une bande poreuse étirée et frittée (2, 28, 29) ou d'un film composé d'un polymère fluoré non transformable à l'état fondu et d'une couche fermée extérieure (3, 30, 31) composée d'un polymère fluoré transformable à l'état fondu.
  11. Ligne électrique selon la revendication 10, caractérisée en ce que le polymère fluoré non transformable à l'état fondu est un polytétrafluoréthylène.
  12. Ligne électrique selon la revendication 10, caractérisée en ce que la couche fermée extérieure (3, 30, 31) est reliée par adhérence au moins à la couche de bande ou de film tout à fait en haut de l'enroulement intérieur.
  13. Ligne électrique selon la revendication 1 ou l'une des suivantes, caractérisée en ce que l'isolation (24, 25) des brins (20, 21) pour l'alimentation électrique se compose d'un polymère fluoré transformable à l'état fondu.
  14. Ligne électrique selon la revendication 1 ou l'une des suivantes, avec un brin de remplissage central (tresse) (33) autour duquel sont torsadés les brins individuels ou les paires, caractérisée en ce que le brin de remplissage (33) se compose d'un boudin moulé, étiré et fritté, en polytétrafluoréthylène.
  15. Ligne électrique selon la revendication 14, caractérisée en ce que le boudin moulé, étiré et fritté, se compose d'une bande de polytétrafluoréthylène torsadée pour former un brin.
  16. Ligne électrique selon la revendication 10 ou l'une des suivantes, caractérisée en ce que le rapport entre l'épaisseur de paroi de l'enroulement de bande ou de film et la couche fermée reliée par adhérence est d'environ 3:1.
  17. Ligne électrique selon la revendication 1 ou l'une des suivantes, caractérisée en ce que le diamètre des brins (20, 21) pour l'alimentation électrique et le diamètre des brins de données (18, 19) sont maintenus identiques ou presque identiques.
  18. Ligne électrique selon la revendication 1 ou l'une des suivantes, caractérisée en ce que les brins (20, 21) pour l'alimentation électrique et les brins de données (18, 19) sont torsadés ensemble en même temps.
  19. Ligne électrique selon la revendication 1 ou l'une des suivantes, caractérisée en ce que la gaine extérieure (9, 17, 37) de la ligne est un caoutchouc silicone vulcanisé à chaud (HTV).
  20. Ligne électrique selon la revendication 1 ou l'une des suivantes, caractérisée en ce que la gaine extérieure (17) de la ligne est un caoutchouc LSR (« Liquid Silicon Rubber »).
  21. Ligne électrique selon la revendication 10 ou l'une des suivantes, caractérisée en ce que la ligne électrique blindée par le non-tissé conducteur (8, 16, 36), dans laquelle le polymère fluoré non transformable à l'état fondu est un polytétrafluoréthylène, ledit polytétrafluoréthylène contenant également des polymères de tétrafluoréthylène munis d'additifs modifiés en quantité telle que le polymère n'est pas transformable à l'état fondu, présente à l'état dynamique une haute flexibilité à des températures de - 50 ° à +180 °C pour un débit de données à transmettre >800 Mb/sec.
  22. Utilisation de la ligne électrique selon la revendication 1 ou l'une des suivantes pour la transmission de données basse fréquence et haute vitesse par des fils de cuivre (LVDS).
EP08012284.9A 2007-09-05 2008-07-08 Ligne de données électrique, très flexible et blindée Not-in-force EP2034491B9 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007041981A DE102007041981A1 (de) 2007-09-05 2007-09-05 Hochflexible geschirmte elektrische Datenleitung

Publications (4)

Publication Number Publication Date
EP2034491A2 EP2034491A2 (fr) 2009-03-11
EP2034491A3 EP2034491A3 (fr) 2012-04-11
EP2034491B1 true EP2034491B1 (fr) 2013-08-28
EP2034491B9 EP2034491B9 (fr) 2013-11-06

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EP08012284.9A Not-in-force EP2034491B9 (fr) 2007-09-05 2008-07-08 Ligne de données électrique, très flexible et blindée

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US (1) US20090056972A1 (fr)
EP (1) EP2034491B9 (fr)
DE (1) DE102007041981A1 (fr)

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Also Published As

Publication number Publication date
EP2034491A2 (fr) 2009-03-11
EP2034491A3 (fr) 2012-04-11
DE102007041981A1 (de) 2009-03-12
EP2034491B9 (fr) 2013-11-06
US20090056972A1 (en) 2009-03-05

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