EP2023691A1 - Elément d'électroluminescence - Google Patents

Elément d'électroluminescence Download PDF

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Publication number
EP2023691A1
EP2023691A1 EP08159576A EP08159576A EP2023691A1 EP 2023691 A1 EP2023691 A1 EP 2023691A1 EP 08159576 A EP08159576 A EP 08159576A EP 08159576 A EP08159576 A EP 08159576A EP 2023691 A1 EP2023691 A1 EP 2023691A1
Authority
EP
European Patent Office
Prior art keywords
electroluminescent element
element according
electrode arrangement
base support
control unit
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.)
Withdrawn
Application number
EP08159576A
Other languages
German (de)
English (en)
Inventor
Jens Dipl. Ing. Richter
Christian Dipl. Kfm. Schreiner
Manfred Dipl. Ing. Falkenhagen
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.)
Schreiner Group GmbH and Co KG
Original Assignee
Schreiner Group 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 Schreiner Group GmbH and Co KG filed Critical Schreiner Group GmbH and Co KG
Publication of EP2023691A1 publication Critical patent/EP2023691A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
    • H05B33/28—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode of translucent electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H05B33/06—Electrode terminals

Definitions

  • the invention relates to an electroluminescent element with a first electrode arrangement arranged on a flat base support, with a luminescent layer and with a second electrode arrangement, wherein the first electrode arrangement is electrically coupled to a control unit arranged on the base support.
  • an electroluminescent element which is operated with an alternating voltage. If, as frequently, only one DC voltage source is available, the DC voltage must be transformed into an AC voltage of a specific frequency and amplitude.
  • Such a circuit is commonly referred to as an "inverter”.
  • the electronic circuits required for this purpose are housed in a separate housing, often also a switch and a device for brightness control are provided. It crimping, bonding and adhesive and plug connections are used to connect the controller, which contains the inverter, via a connecting cable with the actual electroluminescent element.
  • the invention has for its object to provide an electroluminescent element, which is easier, faster and therefore cheaper to produce.
  • the electroluminescent element should also be characterized by a compact design.
  • the electrical connection of the second electrode assembly which is usually transparent and consists of indium tin oxide (ITO) or polythiophene, evenly supply all surface areas of the second electrode assembly with electric current to produce a uniformly bright image.
  • ITO indium tin oxide
  • polythiophene evenly supply all surface areas of the second electrode assembly with electric current to produce a uniformly bright image.
  • a conductive strip is arranged on the base carrier, which extends along at least one side of the luminescent layer and the in is in electrical contact with the control unit and in contact with the second electrode arrangement.
  • control unit containing the inverter can be mounted on a base support, which also serves as the basis for the construction of the electroluminescent element.
  • the conductive strip which represents the electrical connection between the control unit and the second electrode arrangement, ensures that the second (usually transparent) electrode arrangement is connected in a low-resistance manner and is supplied with current substantially uniformly across the area.
  • the carrier retains its shape and is able to be clipped into a housing or overmoulded.
  • the carrier can also be equipped with comparatively heavy components, such as coils and transformers.
  • a strain relief for the cable of the supply voltage by encapsulation or potting can be created on the support.
  • the fact that the carrier is the integral and structuring component eliminates the cable and plug connection.
  • a dielectric is arranged between the luminescent layer and one of the two electrode arrangements.
  • the transparent second electrode arrangement which usually consists of a thin layer of indium tin oxide (ITO) or polythiophene, is protected.
  • control unit is arranged on the side opposite the first electrode assembly side of the base support.
  • short connections between the control unit and the actual electroluminescent element can be produced by means of plated-through hole.
  • control unit on the side of the base carrier to arrange on which the actual electroluminescent element is arranged, when the base support projects beyond the actual electroluminescent element.
  • a semi-flexible material or sinker material is preferably used as the material for the base support.
  • Glass fiber-reinforced epoxy resin has proved to be particularly suitable.
  • the base carrier preferably has a conductive metal support on both sides.
  • the base carrier is a board with (structured) metal supports. These are plated through to electrically connect the control unit to the first electrode arrangement of the electroluminescent element. Through the via eliminates the need in the conventional electroluminescent element, in which the film and the inverter are built separately and last connected to each other, necessary step of the electrical contact.
  • the commonly used types of connection such as gluing, crimping, riveting, etc. are very labor intensive and error prone.
  • one of the two conductive metal supports of the base support forms the first electrode arrangement, which is also referred to as "return electrode”.
  • the other layers of the electroluminescent element can be applied in the printing process.
  • one of the metal pads may form the conductive strip which extends along the edge of the luminescent layer and which is connected in a low-resistance manner to the second electrode arrangement in order to supply the second electrode arrangement as uniformly as possible with current.
  • the inverter usually contained in the control unit is preferably encapsulated or overmolded, whereby the electroluminescent element is particularly vibration and shock resistant.
  • the first electrode assembly is preferably patterned to make the illuminated area.
  • a surface refinement for example a gold plating.
  • the glossy surface refinement increases the brightness of the electroluminescent element and eliminates the pressure of two layers (reverse silver and carbon against silver migration).
  • the "busbar" is also present as a structure, so that also eliminates the necessary for the production of the busbar according to the prior art printing process.
  • the electroluminescent element according to the invention can be encapsulated or encapsulated as a whole and can therefore be configured as a complete component, for example as a door sill for a motor vehicle.
  • the power cable of the electroluminescent element can be encapsulated or encapsulated, whereby the power cable receives a strain relief.
  • FIG. 1 is to recognize a base support 1, which is made of a semi-flexible material or board material.
  • the base support 1 consists in the example of glass fiber reinforced epoxy resin.
  • the base support 1 has on both sides in each case a conductive metal support 2a or 2b.
  • the conductive layers 2a and 2b are surface-refined (eg gold-plated) and structured on both sides and through-contacted with each other at the required points (not visible in the drawing).
  • the lower side of the base support 1 is equipped with a control unit 5 and possibly other electronic components.
  • the metal support on the opposite (upper) side forms the (contoured or structured) first electrode assembly 2a and a conductive strip 8.
  • a dielectric 6 (insulation / reflector layer) imprinted on the electrode assembly 2a.
  • the luminous layer 3 contains electroluminophores in a binder.
  • a transparent conductive layer or electrode arrangement 4 is printed over the luminescent layer 3.
  • the electrode assembly 4 is covered by a printed insulation layer 7 and protected against mechanical injury. Likewise, the insulating layer 7 protects the user from contact with the electrode assembly 4.
  • the above-mentioned conductive strip 8 (also called busbar), which lies on the same plane as the patterned electrode arrangement 2a.
  • the conductive strip 8 extends approximately parallel to the outer edge of the luminescent layer 3 perpendicular to the plane of the drawing.
  • the electrode assembly 4 is connected in this way via the conductive strip 8 to the metal support 2b and thus to the control unit 5.
  • the electrode assembly 4 Since the contact with the conductive strip 8 can be realized on the entire outer edge of the electrode assembly 4, and the conductive strip 8 has a small electrical resistance, the electrode assembly 4 is supplied with low-impedance current, whereby a uniform distributed over the surface power supply is ensured.
  • the control unit 5 For operation of the electroluminescent element, the control unit 5 is supplied with a DC voltage.
  • the DC voltage is converted in the inverter contained in the control unit 5 in an AC voltage of certain frequency and amplitude.
  • the voltage is applied to the first electrode arrangement 2a and to the conductive strip 8.
  • This results in an alternating electric field between the first electrode arrangement 2a and the second electrode arrangement 4.
  • the electroluminophores in the Luminous 3 excited to emit light which is emitted through the transparent electrode assembly 4 and the transparent insulating layer 7 to the outside. Since the first electrode assembly 2a is patterned, the electroluminescent element only shines at certain locations, so that a luminous image or a luminous lettering or the like can be displayed.
  • FIG. 2 is to recognize a base support 1, which is made of a circuit board material.
  • the base support 1 has a conductive metal support 2.
  • the conductive layer 2 is structured and surface-refined (eg gold-plated).
  • the metal support forms the (structured) first electrode arrangement 2 and a conductive strip 8.
  • the left side of the base support 1 in the drawing projects beyond the layer structure to be described below.
  • This protruding part of the base support 1 is equipped with a control unit 5 and possibly other electronic components.
  • the components mentioned are electrically connected to one another by interconnects and to the first electrode arrangement 2.
  • a dielectric 6 (reflector layer) is applied on the first electrode assembly 2.
  • a dielectric 6 (reflector layer) is applied above is the luminescent layer 3.
  • the luminescent layer 3 contains electroluminophores in a binder.
  • a transparent conductive layer is arranged, which forms the second electrode arrangement 4.
  • the second electrode assembly 4 is covered by a printed insulation layer 7 and protected by this against mechanical injury. Likewise, the insulation layer 7 protects the user from contact with the second electrode arrangement 4.
  • the above-mentioned conductive strip 8 (also called busbar), which lies on the same plane with the structured electrode assembly 2.
  • the conductive strip 8 extends approximately parallel to the outer edge of the luminescent layer 3 perpendicular to the plane of the drawing.
  • the electrode assembly 4 is connected in this way via the conductive strip 8 with the conductor tracks formed from the metal support 2 and thus with the control unit 5.
  • the electrode assembly 4 Since the contact with the conductive strip 8 can be realized on the entire outer edge of the electrode assembly 4, and the conductive strip 8 has a small electrical resistance, the electrode assembly 4 is supplied with low-impedance current, whereby a uniform distributed over the surface power supply is ensured.
  • the control unit 5 For operation of the electroluminescent element, the control unit 5 is supplied with a DC voltage.
  • the DC voltage is converted in the inverter contained in the control unit 5 in an AC voltage of certain frequency and amplitude. Due to the mentioned structured conductor tracks, the voltage reaches the first electrode arrangement 2 of the electroluminescent element. This produces an alternating electric field between the first electrode arrangement 2 and the second electrode arrangement 4. This alternating electric field excites the electroluminophores in the luminescent layer 3 to emit light which is emitted through the transparent insulation layer 7 to the outside. Since the electrode assembly 2 is structured, the electroluminescent element only shines in certain places, so that a luminous image or a luminous lettering or the like are displayed

Landscapes

  • Electroluminescent Light Sources (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
EP08159576A 2007-08-02 2008-07-03 Elément d'électroluminescence Withdrawn EP2023691A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007036151 2007-08-02

Publications (1)

Publication Number Publication Date
EP2023691A1 true EP2023691A1 (fr) 2009-02-11

Family

ID=39929620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08159576A Withdrawn EP2023691A1 (fr) 2007-08-02 2008-07-03 Elément d'électroluminescence

Country Status (1)

Country Link
EP (1) EP2023691A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB788479A (en) * 1954-11-01 1958-01-02 Westinghouse Electric Int Co Improvements in or relating to electroluminescent cells
US5530318A (en) * 1995-05-24 1996-06-25 Durel Corporation, A Delaware Corporation EL lamp with integral fuse and connector
WO2002103718A2 (fr) * 2001-06-19 2002-12-27 E.L. Specialists, Inc. Encres durcissables aux rayons ultraviolets pour des lamines en film de polymere epais (comprenant un circuit flexible)
DE10321152A1 (de) 2003-05-12 2004-12-23 Schreiner Group Gmbh & Co. Kg Verfahren zum Bearbeiten eines elektrolumineszierenden Elements und nach diesem Verfahren bearbeitetes elektrolumineszierendes Element
US20050017930A1 (en) * 2003-06-05 2005-01-27 Yoshinao Kobayashi Image display apparatus
US6977806B1 (en) * 2003-02-26 2005-12-20 Tdk Corporation Multi-layered unit including electrode and dielectric layer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB788479A (en) * 1954-11-01 1958-01-02 Westinghouse Electric Int Co Improvements in or relating to electroluminescent cells
US5530318A (en) * 1995-05-24 1996-06-25 Durel Corporation, A Delaware Corporation EL lamp with integral fuse and connector
WO2002103718A2 (fr) * 2001-06-19 2002-12-27 E.L. Specialists, Inc. Encres durcissables aux rayons ultraviolets pour des lamines en film de polymere epais (comprenant un circuit flexible)
US6977806B1 (en) * 2003-02-26 2005-12-20 Tdk Corporation Multi-layered unit including electrode and dielectric layer
DE10321152A1 (de) 2003-05-12 2004-12-23 Schreiner Group Gmbh & Co. Kg Verfahren zum Bearbeiten eines elektrolumineszierenden Elements und nach diesem Verfahren bearbeitetes elektrolumineszierendes Element
US20050017930A1 (en) * 2003-06-05 2005-01-27 Yoshinao Kobayashi Image display apparatus

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