EP1152643B1 - Dispositif d'affichage comprenant au moins une surface électroluminescente - Google Patents

Dispositif d'affichage comprenant au moins une surface électroluminescente Download PDF

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Publication number
EP1152643B1
EP1152643B1 EP01890124A EP01890124A EP1152643B1 EP 1152643 B1 EP1152643 B1 EP 1152643B1 EP 01890124 A EP01890124 A EP 01890124A EP 01890124 A EP01890124 A EP 01890124A EP 1152643 B1 EP1152643 B1 EP 1152643B1
Authority
EP
European Patent Office
Prior art keywords
layer
display device
circuit board
printed
layers
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.)
Expired - Lifetime
Application number
EP01890124A
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German (de)
English (en)
Other versions
EP1152643A1 (fr
Inventor
Christian Dkfm Czak
Manfred Ing. Novotny
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.)
Schoenberg Elumic GmbH
Original Assignee
Schoenberg Elumic GmbH
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Filing date
Publication date
Application filed by Schoenberg Elumic GmbH filed Critical Schoenberg Elumic GmbH
Priority to AT01890124T priority Critical patent/ATE264045T1/de
Publication of EP1152643A1 publication Critical patent/EP1152643A1/fr
Application granted granted Critical
Publication of EP1152643B1 publication Critical patent/EP1152643B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B33/22—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • 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

Definitions

  • the invention relates to a display device with at least one electroluminescent surface, being on a supporting circuit board a bonding layer and thereon the layers of the EL lamp are.
  • Such display devices are preferably electronic components with integrated graphically designed electroluminescence (EL) displays based on inorganic thick film systems.
  • EL electroluminescence
  • inorganic thick film EL systems at relatively high AC voltages of typically 100 to 200 volts (RMS) and more 100 Hz, typically 400 Hz must be operated up to a few kHz, were and are displays with a variety of small EL surfaces difficult in the electronic control, there meaningfully the Secondary side of a standard EL inverter, so called relative high alternating voltage, must be switched.
  • Novel electronic semiconductor devices enable this now and it is therefore necessary to connect the plurality of EL capacitors or to wire.
  • Destriau is based on electroluminescence (EL) high alternating voltage field on ZnS phosphor powder with manganese and / or Copper doping known, and there are diverse first today and other coactivators for increasing the brightness and the lifetime used.
  • EL electroluminescence
  • DE-OS 40 23 693 is a display device with electroluminescent lighting described in which a circuit board is used as a base electrode.
  • a circuit board is used as a base electrode.
  • the connection of transparent and electrically conductive display side with the Luminescent pigments or with a dielectric and "binder" is disadvantageous.
  • US Pat. No. 5,244,750 describes EL lamps described the special copper and manganese activated zinc sulfide phosphorus pigments with a microencapsulation based on alumina use and so a high brightness with long life cause.
  • US-PS 5,667,417 and in US-PS 5,720,639 is a Method of making EL lamps called and a technology used, which comes from the flexible printed circuit board industry, wherein Metal foils aztechnisch and the like are structured, so that they serve as a base electrode for the further EL capacitor structure, and so inexpensively a plurality of EL lamp elements in one Roller process can be produced.
  • US 5,620,348 is a Method of making EL lamps with transflective front electrodes as well as special other light extracting effects called.
  • US Patent 5,593,782 one with a very thin one Oxide film encapsulated electroluminescent phosphorus and its Production method described by vapor phase hydrolysis and the Advantages in terms of high brightness and long life demonstrated.
  • JP-PS 11260561 describes an EL lamp in which the transparent electrically conductive layer produced by screen printing will be called and also color-converting admixtures.
  • the present invention is the above-mentioned DE-OS 40 23 693 (Moser) in terms of construction closest.
  • the present invention is based on the object, a display device with electroluminescent lighting based on inorganic AC thick film systems to create, the Layer structure on a carrier substrate by means of printing processes such as Screen printing or offset printing in large numbers with the necessary Precision can be made.
  • the light output should be high and the control of a plurality of light fields should be in communication be kept compact with the associated electronics.
  • the present invention is characterized in that Bonding layer either one, preferably anisotropic in the direction of Layer thickness, electrically conductive layer or a layer with high Dielectric constant, preferably> 3.5, and that the EL lamp an at least partially transparent carrier layer which is inside with a transparent electrically conductive cover electrode layer and under it is provided with the phosphor layer.
  • FIGS. 1 to 4 are schematic Representations of the cross section through the device.
  • FIGS. 5 and 6 show top view and section through a device for displaying the Contacting the busbar from the printed circuit board to the cover electrode layer. The layer thicknesses are not drawn to scale.
  • the device comprises one of several Layers existing EL lamp 1, the circuit board 2 and the between them lying connecting layer 3.
  • EL lamp 1 and the circuit board 2 made separately from each other and connected to each other by means of the bonding layer 3.
  • the EL lamp 1 comprises at least partially as a carrier substrate transparent carrier layer 4, for example, a thermoplastic Plastic film is.
  • the overlying decorative layer 5 serves the graphic design of both the illuminated and the unlit Surface sections.
  • On the underside of the carrier layer 4 is for forming a transparent electrically conductive cover electrode the lid electrode layer 6 is arranged. It is about preferably a so-called ITO (indium tin oxide) layer or a NON-ITO layer or a conductive polymer coating, the similar to an ITO layer works and in the case of the expensive indium other substances is replaced.
  • ITO indium tin oxide
  • NON-ITO a conductive polymer coating
  • electroluminescent particles 8 When speaking of phosphor layers, means this does not involve the presence of phosphorus, but includes all applicable ones electroluminescent substances.
  • the decorative layer 5 can also be below the carrier layer 4 are.
  • the EL lamp 1 can also go down through a counter electrode 18 to be completed.
  • the circuit board 2 has on the inside 11 guide surfaces 12 which eg. consist of copper and their surface forms, for example. according to known Etching process can be produced.
  • Contact elements 13 protrude the circuit board 2 and connect the fins 12 with traces 14 on the component side 15 of the circuit board 2.
  • On the component side 15 are for the control and power supply of the Device required electronic components 16 arranged.
  • the cover electrode layer 6 is by means of a not shown here Connecting line (busbar) with the electronics on the Printed circuit board 2 connected.
  • the EL lamp 1 is on the circuit board 2 by means of the bonding layer 3 connected.
  • This can be a corresponding adhesive film or else consist of a liquid applied adhesive.
  • the bonding layer has a high dielectric constant, preferably> 3.5 and more preferably between 30 and 50.
  • alternating-field electroluminescent particles 8 When attached to one or more of the fins 12 and to the top electrode layer 6 AC voltage is applied, it comes to a suggestion the alternating-field electroluminescent particles 8 and for emitting the light beams 9.
  • the alternating field is dashed indicated by 17.
  • the geometric dimensions of the guide surfaces 12 determine the geometric dimension of the luminous surfaces.
  • the single ones Layers of the EL lamp 1 are preferably screen-printed the carrier substrate applied. But there may be other printing methods how to apply offset printing.
  • Typical layer thicknesses for the support layer 4 are 175 microns, for the decorative layer to 30 microns, for the lid electrode layer 6 in the case of conductive polymer coating or ITO sputtered layers ⁇ 1 ⁇ m and in the case of ITO or NON ITO pastes > 1 ⁇ m for the phosphor layer 7 about 30 microns, for the Dielectric layer about 10 microns.
  • For the thickness of the bonding layer can about 62.5 microns are assumed and the circuit board 2 is usually a thickness between 300 microns and 1.6 mm.
  • Dielectric layer 10 is optionally arranged and has a high relative dielectric constant greater than 3.5 and typically between 30 and 50 on. Layer thicknesses between 10 and 20 microns are preferred. To avoid missing parts (pinholes) is careful Printing necessary and this layer can also be done twice Printing to be trained. Furthermore, it is advantageous if the dielectric layer 10 a good reflection of the electroluminescent light having.
  • Advantageous materials for the carrier layer 4 are eg. PE, PET-G, PC, PVC and PMMA. Layer thicknesses of 50 to 500 ⁇ , preferably 175 to 250 microns are proposed. This carrier layer allows for the final product a high degree of flexibility and thus also 3-dimensional shapes. But as a support layer can also others Materials such as. Find glass use.
  • a printed circuit board 2 can be rigid and or flexible and / or Multilayer panels are used.
  • the soldering of the electronic Components on the component side 15 of the circuit board can at Apply appropriate techniques even after applying the EL lamp 1, for example. by means of so-called reflow soldering or conductive adhesives, whereby disturbing temperatures are avoided.
  • the via by means of the contact elements 13 allows the necessary tracks and electronic components on all sides the circuit board 2 accommodate while on the inside 11 only the guide surfaces 12 housed as electrodes or contact points Need to become. This is a compact design of the device possible.
  • a preferred feature of the invention is the counterelectrodes from the circuit board to drive and the cover electrodes on the other side of the EL layer. According to Fig.1 if the counterelectrode is formed directly on the surface of the printed circuit board, wherein the bonding layer has a high dielectric constant having.
  • the guide surfaces act 12 not directly as counter electrodes, but there are such Counter electrodes 18 Component of the EL lamp 1.
  • This can, for example. by means of Screen print a corresponding layer of silver paste or another printed conductive paste.
  • the electric wire of the guide surfaces 12 on the counter electrodes 18 is here via an in Z-direction anisotropically conductive bonding layer 3 accomplished.
  • the alternating field thus acts between the counter electrode 18 and the Cover electrode 6.
  • the embodiment of FIG. 2 corresponds to those 1 and the reference numerals each refer to the same or analogous features.
  • the Z-axis anisotropically conductive bonding layer 3 can, for example. by Films of the company 3M types 7303 and / or 9703 are formed.
  • anisotropic conductive adhesive layers it is also possible within the scope of the invention, by means of printing process to arrange isotropically conductive bonding layers in sections such that only in those areas the isotropically conductive bonding layers are arranged where the electrical line should be made.
  • the particular advantage of the embodiment of Figure 2 is that a exact positioning of the counter electrodes can be achieved and the entire composite retains its flexibility and flexibility.
  • the dielectric layer here consists of two layers 19,20, like one twice printing corresponds.
  • the layer structure can also be done easier by eg. in the execution According to Figure 1, the dielectric layer is omitted.
  • the Phosphor layer and the lid electrode layer 6 arranged above it are not arranged continuously, but in sections, like the Illuminated surfaces of the device should correspond.
  • the counterelectrodes 18 are the EL layer 7 and the cover electrode layer 6 arranged in sections.
  • the dielectric layers 19, 20 are continuous.
  • the decorative layer 5 is here below the final carrier layer 4, which gives a higher abrasion resistance of the surface can be.
  • the outer surface of the carrier layer 4 can for anti-reflection For example, be frosted or otherwise designed visually.
  • the power supply is from the guide surface 21 through the bonding layer 3 through to a Contact layer 22, and from there to the connection point 23 of the cover electrode layer.
  • FIG. 5 shows the top view of the device with a schematic drawn light fields 24.
  • the top layer of the EL lamp 1 Here is the decorative layer 5.
  • a bus bar 25 serves to connect the Cover electrode layer 6 with a Anschlußkokntakt 26 on the front or component side of the circuit board 2, as shown in Fig.6.
  • the busbar can be used as a carrier substrate a flag 27 as an extension the carrier layer 4, on the power line to a web 28th the lid electrode layer is printed. With the screw 29 is the busbar fixed. This contact device can be omitted if the Contacting takes place directly through the bonding layer, as in Fig.4 is shown on the left.
  • the copper surface of the circuit board represents the Counter electrode of the capacitor (EL lamp) dar.
  • the series represents a cheaper option, but puts to the Manufacturing technology significantly higher demands in terms of Precision, as attention is paid to plane-parallel electrode spacing got to.
  • the bonding layer need not be applied over the entire surface, as in the Figures shown, but may in their conductive form as well be partially applied to the electrical connection to the Produce counter electrodes 18.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Claims (14)

  1. Dispositif d'affichage avec au moins une surface électroluminescente, une couche de liaison avec sur celle-ci les couches de la lampe EL étant disposée sur une carte support à circuit imprimé, caractérisé en ce que la couche de liaison (3) est soit une couche électro-conductrice, de préférence anisotrope en direction de l'épaisseur de la couche, soit une couche avec une constante diélectrique élevée, de préférence >3,5, et en ce que la lampe EL (1) comprend une couche de support (4) au moins partiellement transparente, qui porte, côté intérieur, une couche (6) d'électrodes de couverture transparente électro-conductrice avec sous celle-ci la couche de phosphore (7).
  2. Dispositif d'affichage selon la revendication 1, caractérisé en ce qu'il est prévu, entre la couche de liaison (3) et la couche de phosphore (7), une couche de diélectrique (10, 19, 20) avec des propriétés de réflexion de la lumière.
  3. Dispositif d'affichage selon les revendications 1 ou 2, caractérisé en ce que des surfaces conductrices (12) sont disposées en tant que contre-électrodes sur la face intérieure (11) de la carte à circuit imprimé (2) et en ce que la couche de liaison (3) est une couche à constante diélectrique élevée, de préférence >3,5.
  4. Dispositif d'affichage selon les revendications 1 ou 2, caractérisé en ce qu'aux surfaces conductrices (12) sont associées des couches formant contre-électrodes (18), qui sont disposées sur les couches de la lampe EL (1) et en ce que la couche de liaison (3), entre les couches conductrices (12) et les contre-électrodes est électro-conductrice:, de préférence de manière anisotrope en direction de l'épaisseur de la couche.
  5. Dispositif d'affichage selon les revendications 1 à 4, caractérisé en ce que la couche de phosphore (7) et la(les) couche(s) formant contre-électrode(s) (18), sur la couche d'électrodes de couverture (6), couvre toute la surface ou des parties de celle-ci, de préférence une ou plusieurs couches de diélectrique (10, 19, 20) étant prévues entre la couche de phosphore (7) et la couche formant contre-électrode (18).
  6. Dispositif d'affichage selon une des revendications 4 ou 5, caractérisé en ce que la(les) couche(s) formant contre-électrode(s) (18) est(sont) imprimée(s) avec de la pâte d'impression électro-conductrice.
  7. Dispositif d'affichage selon les revendications 1 à 6, caractérisé en ce que les couches sont imprimées par un procédé de sérigraphie sur la couche de support (4).
  8. Dispositif d'affichage selon les revendications 1 à 7, caractérisé en ce que la couche de liaison (3) est un film adhésif électro-conducteur anisotrope.
  9. Dispositif d'affichage selon les revendications 1 à 8, caractérisé en ce que la couche de support (4) est un film de matière plastique thermoplastique, tel que du PET, PET-G, PC, PVC ou PMMA, et présente une épaisseur comprise entre 50 et 500 µm, de préférence entre 175 et 250 µm.
  10. Dispositif d'affichage selon les revendications 1 à 9, caractérisé en ce que la couche d'électrodes de couverture (6) est une couche ITO, une couche NON-ITO ou une couche de polymère conductrice transparente.
  11. Dispositif d'affichage selon les revendications 1 à 10, caractérisé en ce que la couche de support (4) extérieurement ou intérieurement est structurée graphiquement par sérigraphie ou par impression offset.
  12. Dispositif d'affichage selon les revendications 1 à 11, caractérisé en ce que la couche d'électrodes de couverture (6) reçoit la tension de la carte à circuit imprimé (2) par l'intermédiaire d'un bus (piste 28) ou en ce qu'une ligne électrique est prévue à travers la couche de liaison (3) (figure 5).
  13. Dispositif d'affichage selon les revendications 1 à 12, caractérisé en ce que le bus (25) est conformé en patte (27) arrivant sur le côté de la lampe EL (1), avec une piste conductrice (28) qui est reliée électriquement à la carte à circuit imprimé (2).
  14. Dispositif d'affichage selon les revendications 1 à 13, caractérisé en ce que la couche de diélectrique (10, 19, 20) présente une épaisseur comprise de préférence entre 10 et 20 µm et une constante diélectrique >3,5, de préférence entre 30 et 50 et de préférence est produite par double impression.
EP01890124A 2000-05-04 2001-05-02 Dispositif d'affichage comprenant au moins une surface électroluminescente Expired - Lifetime EP1152643B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT01890124T ATE264045T1 (de) 2000-05-04 2001-05-02 Anzeigevorrichtung mit mindestens einer elektrolumineszierenden fläche

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0078600A AT500481B8 (de) 2000-05-04 2000-05-04 Anzeigevorrichtung mit mindestens einer elektrolumineszierenden fläche
AT7862000 2000-05-04

Publications (2)

Publication Number Publication Date
EP1152643A1 EP1152643A1 (fr) 2001-11-07
EP1152643B1 true EP1152643B1 (fr) 2004-04-07

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EP01890124A Expired - Lifetime EP1152643B1 (fr) 2000-05-04 2001-05-02 Dispositif d'affichage comprenant au moins une surface électroluminescente

Country Status (4)

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EP (1) EP1152643B1 (fr)
AT (2) AT500481B8 (fr)
DE (1) DE50101882D1 (fr)
DK (1) DK1152643T3 (fr)

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GB1594357A (en) * 1976-08-19 1981-07-30 Bbc Brown Boveri & Cie Production of electroluminescent powder
GB1509478A (en) * 1976-12-10 1978-05-04 Ibm Flat panel display device
JPS53118390A (en) * 1977-03-25 1978-10-16 Sharp Corp Thin film luminous element
US4130776A (en) * 1978-01-30 1978-12-19 T. L. Robinson Co., Inc. EL bar graph for displaying analogue measurements of temperature and the like
US4665342A (en) 1984-07-02 1987-05-12 Cordis Corporation Screen printable polymer electroluminescent display with isolation
US4647337A (en) 1984-12-03 1987-03-03 Luminescent Electronics, Inc. Method of making electroluminescent panels
GB2178213B (en) 1985-07-01 1989-07-26 Phosphor Prod Co Ltd Electroluminescent display panels
US4687968A (en) 1985-08-12 1987-08-18 Rogers Corporation Encapsulated electroluminescent lamp
US4745334A (en) 1985-10-25 1988-05-17 Alps Electric Co., Ltd. Electroluminescent element and method for connecting its terminals
IL80861A0 (en) 1986-12-03 1987-03-31 Technoset Ltd Electroluminescent lighting elements
US4775964A (en) 1988-01-11 1988-10-04 Timex Corporation Electroluminescent dial for an analog watch and process for making it
US5184969A (en) * 1988-05-31 1993-02-09 Electroluminscent Technologies Corporation Electroluminescent lamp and method for producing the same
DE4023693A1 (de) * 1989-09-20 1991-03-28 Helmut Moser Anzeigeeinrichtung mit elektrolumineszierender beleuchtung
JP2833282B2 (ja) * 1991-08-20 1998-12-09 富士電機株式会社 エレクトロルミネッセンス表示装置とその製造方法
JPH05205875A (ja) 1992-01-28 1993-08-13 Pioneer Electron Corp 有機エレクトロルミネッセンス表示装置
US5432015A (en) 1992-05-08 1995-07-11 Westaim Technologies, Inc. Electroluminescent laminate with thick film dielectric
JP2891875B2 (ja) 1994-06-09 1999-05-17 日本電気株式会社 液晶表示装置
DE4430691A1 (de) 1994-08-30 1996-03-07 Bayer Ag Elektrolumineszierende Anordnungen und deren Verwendung
JPH0935571A (ja) 1995-07-14 1997-02-07 Matsushita Electric Ind Co Ltd 照光式スイッチユニット
JP3652042B2 (ja) * 1997-01-17 2005-05-25 河口湖精密株式会社 エレクトロルミネッセンスの構造
JP4185605B2 (ja) * 1998-12-02 2008-11-26 ソニーケミカル＆インフォメーションデバイス株式会社 Ｅｌ表示装置、ｅｌ表示装置製造方法

Also Published As

Publication number Publication date
DK1152643T3 (da) 2004-08-09
AT500481A1 (de) 2006-01-15
ATE264045T1 (de) 2004-04-15
EP1152643A1 (fr) 2001-11-07
DE50101882D1 (de) 2004-05-13
AT500481B1 (de) 2006-09-15
AT500481B8 (de) 2007-02-15

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