WO2000070639A1 - Electrodes de liaison transparentes entourant un affichage electroluminescent - Google Patents

Electrodes de liaison transparentes entourant un affichage electroluminescent Download PDF

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Publication number
WO2000070639A1
WO2000070639A1 PCT/US2000/012761 US0012761W WO0070639A1 WO 2000070639 A1 WO2000070639 A1 WO 2000070639A1 US 0012761 W US0012761 W US 0012761W WO 0070639 A1 WO0070639 A1 WO 0070639A1
Authority
WO
WIPO (PCT)
Prior art keywords
transparent
electroluminescent
electrode
electrodes
display
Prior art date
Application number
PCT/US2000/012761
Other languages
English (en)
Inventor
Bryan D. Haynes
Original Assignee
Add-Vision, Inc.
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 Add-Vision, Inc. filed Critical Add-Vision, Inc.
Priority to AU49991/00A priority Critical patent/AU4999100A/en
Publication of WO2000070639A1 publication Critical patent/WO2000070639A1/fr

Links

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
    • 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
    • H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
    • 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

Definitions

  • the present invention relates to generally flat, transparent displays which can be illuminated. More particularly the invention relates to electroluminescent displays which can be viewed from both sides and which have no visible electrical connection between the electrodes and the power supply.
  • a polyethyltoluene (PET) substrate is vacuum sputtered with indium tin oxide (ITO).
  • ITO indium tin oxide
  • the resulting transparent substrate acts as the front electrode in an electroluminescent display.
  • a layer of phosphor or other electroluminescent material is applied to the front electrode.
  • a layer of dielectric material is used to fill the voids in the phosphor layer to prevent the electrodes from shorting and to vary the strength of the electric field.
  • Barium titanate which is opaque, is the dielectric material most commonly used to fill these voids in the phosphor.
  • the rear electrode is applied, using silver conductive ink, which is also opaque.
  • the phosphor layer When an electrical current is applied to the front and rear electrodes, the phosphor layer emits light which is transmitted through the front transparent electrode.
  • opaque silver conductors are printed between the source of the electrical current and the parallel front and rear electrodes in order to carry the current from the edge of the PET substrate to the electrodes. When viewing the display, it is apparent that electricity travels to the illuminated electroluminescent area through these printed silver wires.
  • These silver wire conductors are also very obvious when trying to produce a see through display to be hung in a window or for any other application where the viewer can see through a lighted display while still viewing the display.
  • the present invention addresses the above-mentioned and other problems within the prior art by providing a transparent electroluminescent display comprising a polyethyltoluene substrate, a transparent front electrode, a layer of phosphor lying adjacent to the transparent front electrode, a transparent rear electrode adjacent to the phosphor layer and parallel to the front electrode, one or more transparent bridge conductors connecting the electrodes to the edge of the polyethyltoluene substrate and a transparent or translucent insulator filling the voids in the phosphor layer.
  • One object of the present invention is to attract interest in the display by providing an electroluminescent display that does not appear to have any connection to the power supply.
  • a second object is to increase visibility through a transparent electroluminescent display.
  • a further object of the present invention is to create an electroluminescent display which can be viewed from either side.
  • the objects mentioned above are achieved through use of a transparent rear electrode and transparent wires.
  • a transparent or translucent insulator is used to fill the voids in the phosphor layer and to vary the strength of the electric field between the parallel electrode plates or conductors.
  • This transparent or translucent insulator 5 allows the light emitted by the phosphor layer to exit the lamp through the transparent rear electrode.
  • the light emitted by the phosphor may be viewed from both sides of the electroluminescent lamp.
  • Such a display is particularly suitable for windows.
  • Figure 1 top view of a multiple channel electroluminescent display surrounded by transparent bridge conductors with graphic overlay removed
  • Figure 2 cross-sectional view of an embodiment of the invention showing double- sided electroluminescent lamp assembly using transparent bridge conductors
  • Figure 3 star for tree top and ornament with transparent bridge conductors illustrating an example of an embodiment of the invention
  • Figure 4 a further example of an embodiment of the invention being a window with
  • Figure 5 multiple channel display with isolated electroluminescent lamps shaped as snowflakes surrounded by transparent bridge conductors and power supply Detailed description of the preferred embodiments
  • the invention comprises transparent substrate 1, one or more transparent front electrodes 3, phosphor layer 4 which lies adjacent to transparent front electrode 3, transparent rear electrode 8 which lies adjacent to phosphor layer 4 and parallel to front electrode 3, one or more transparent bridge conductors 2 connecting transparent front electrode 3 and transparent rear electrode 8 to the edge of transparent substrate 1 and transparent or translucent insulator 7 which fills the voids in phosphor layer 4.
  • FIG. 1 illustrates an embodiment of the invention in which substrate 1, which comprises polyethyltoluene (PET) or an alternate clear plastic substrate, has been sputtered with a transparent or translucent conductor.
  • the transparent or translucent conductor comprises indium tin oxide (ITO) or any other transparent or translucent conductor.
  • ITO indium tin oxide
  • the transparent or translucent conductor is etched away from predetermined sections of the substrate to create isolated ITO conductors. These conductors act as front electrodes 3 or bridge conductors 2.
  • Phosphor 4 is applied to an electrically isolated region of ITO or transparent front electrode 3 using either screen printing methods typically used in the fabrication of electroluminescent lamps or any other advantageous method. Phosphor 4 is cured at the specified temperature or UN range.
  • Transparent dielectric 7 is applied over phosphor 4 and cured.
  • Printed silver wires or traces 5, 6 act as conductors, connecting transparent bridge electrodes 2 to transparent front electrode 3, transparent rear electrode 8 and bus bar 9.
  • Silver traces 5, 6 also act to spread the current over the ITO front electrodes 3 or bridge conductors 2.
  • the inset drawing shows the graphical overlay. Graphics 10 are printed in translucent or transparent ink to allow light to be transmitted through the graphics. Bus bar 9 is also shown.
  • FIG. 2 shows a cross sectional view of an embodiment of the present invention.
  • transparent bridge electrodes 2 and transparent front electrode 3 are printed on transparent substrate 1.
  • Phosphor 4 is printed adjacent to transparent front electrode 3.
  • Transparent rear electrode 8 is printed adjacent to phosphor 4.
  • Silver ground electrode 5 electrically connects one of the one or more transparent bridge electrodes 2 with transparent front electrode 3.
  • Printed silver wire 6 electrically connects one of the one or more transparent bridge electrodes 2 with transparent rear electrode 8.
  • Optionally transparent or translucent graphics 10 can be printed adjacent to transparent front electrode 3 and transparent rear electrode 8 and opaque ink 11 can be printed to cover printed silver wires 5 and 6.
  • Printed silver wires 5, 6, printed silver ground trace 12 and printed silver traces 13, 14, 15 act to spread the electric current over the surface area of the ITO. This is necessary as the ITO cannot withstand a large current.
  • FIG 3 shows an example of a completed electroluminescent lamp according to the present invention.
  • Electroluminescent lamp 16 is surrounded by transparent bridge conductors (unseen) contained in decorative frame 17. Power is supplied to electroluminescent lamp 16 through cord 18 and plug assembly 19.
  • Figure 4 illustrates use of an embodiment of the present invention in a typical window frame 25. Window frame 25 surrounds many independent electroluminescent lamps 16 which are shaped as snowflakes. Electroluminescent lamps 16 are attached with a conductive transparent substrate 26 to give the appearance that the snowflakes are suspended.
  • FIG. 5 shows the electrical detail of the embodiment of the present invention shown in Fig. 4.
  • AC power cord 22 is connected to an electroluminescent lamp sequencer 21 that supplies current to printed silver wires 23, 24 and transparent bridge conductors 2.
  • the current sequences through electroluminescent lamps 16 in a regular pattern which simulates snowing. Despite the electroluminescent lighting display, a person can still see through the window.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

L'invention porte sur un ensemble électroluminescent à deux faces comportant de manière générale une électrode (3) frontale transparente, une couche (4) de phosphore, une couche (7) diélectrique transparente ou translucide, une électrode (8) dorsale transparente, et un ou plusieurs conducteurs (2) de liaison transparents reliant l'électrode frontale et l'électrode dorsale à l'alimentation. Les électrodes transparentes de liaison peuvent consister en une couche d'oxyde d'indium/étain déposée sur un substrat transparent et dont on élimine par morsure une partie importante, ne laissant que les conducteurs qui franchissent le substrat sans être eux mêmes visibles.
PCT/US2000/012761 1999-05-13 2000-05-10 Electrodes de liaison transparentes entourant un affichage electroluminescent WO2000070639A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49991/00A AU4999100A (en) 1999-05-13 2000-05-10 Transparent bridge electrodes encompassing electroluminescent display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13406199P 1999-05-13 1999-05-13
US60/134,061 1999-05-13

Publications (1)

Publication Number Publication Date
WO2000070639A1 true WO2000070639A1 (fr) 2000-11-23

Family

ID=22461599

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/012761 WO2000070639A1 (fr) 1999-05-13 2000-05-10 Electrodes de liaison transparentes entourant un affichage electroluminescent

Country Status (2)

Country Link
AU (1) AU4999100A (fr)
WO (1) WO2000070639A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004091261A1 (fr) * 2003-04-08 2004-10-21 Koninklijke Philips Electronics N.V. Dispositif electroluminescent a deux cotes
WO2007020542A2 (fr) * 2005-08-12 2007-02-22 Koninklijke Philips Electronics N.V. Dispositif afficheur plat possedant une unite afficheur plat et ligne electrique destinee a ce dispositif
JP2014531126A (ja) * 2011-10-28 2014-11-20 コーニンクレッカ フィリップス エヌ ヴェ 構造化された陰極を備える透明ｏｌｅｄデバイス及びかかるｏｌｅｄデバイスの製造方法
WO2017187913A1 (fr) * 2016-04-25 2017-11-02 パイオニア株式会社 Système électroluminescent

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4138620A (en) * 1978-03-24 1979-02-06 Minnesota Mining And Manufacturing Company Multi-panel electroluminescent light assembly
US4513023A (en) * 1983-02-23 1985-04-23 Union Carbide Corporation Method of constructing thin electroluminescent lamp assemblies
US4733488A (en) * 1984-02-29 1988-03-29 Nippon Seiki Co., Ltd. Decorative display apparatus
US5779346A (en) * 1995-03-30 1998-07-14 Dynamic Brilliance Corporation Electroluminescent device with a secure contact
US5856029A (en) * 1996-05-30 1999-01-05 E.L. Specialists, Inc. Electroluminescent system in monolithic structure
US5856031A (en) * 1996-05-30 1999-01-05 E.L. Specialists, Inc. EL lamp system in kit form

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4138620A (en) * 1978-03-24 1979-02-06 Minnesota Mining And Manufacturing Company Multi-panel electroluminescent light assembly
US4513023A (en) * 1983-02-23 1985-04-23 Union Carbide Corporation Method of constructing thin electroluminescent lamp assemblies
US4733488A (en) * 1984-02-29 1988-03-29 Nippon Seiki Co., Ltd. Decorative display apparatus
US5779346A (en) * 1995-03-30 1998-07-14 Dynamic Brilliance Corporation Electroluminescent device with a secure contact
US5856029A (en) * 1996-05-30 1999-01-05 E.L. Specialists, Inc. Electroluminescent system in monolithic structure
US5856031A (en) * 1996-05-30 1999-01-05 E.L. Specialists, Inc. EL lamp system in kit form

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004091261A1 (fr) * 2003-04-08 2004-10-21 Koninklijke Philips Electronics N.V. Dispositif electroluminescent a deux cotes
WO2007020542A2 (fr) * 2005-08-12 2007-02-22 Koninklijke Philips Electronics N.V. Dispositif afficheur plat possedant une unite afficheur plat et ligne electrique destinee a ce dispositif
WO2007020542A3 (fr) * 2005-08-12 2007-05-31 Koninkl Philips Electronics Nv Dispositif afficheur plat possedant une unite afficheur plat et ligne electrique destinee a ce dispositif
JP2014531126A (ja) * 2011-10-28 2014-11-20 コーニンクレッカ フィリップス エヌ ヴェ 構造化された陰極を備える透明ｏｌｅｄデバイス及びかかるｏｌｅｄデバイスの製造方法
US9985239B2 (en) 2011-10-28 2018-05-29 Koninklike Philips N.V. OLED device and method of producing an OLED device
WO2017187913A1 (fr) * 2016-04-25 2017-11-02 パイオニア株式会社 Système électroluminescent
JPWO2017187913A1 (ja) * 2016-04-25 2019-03-07 パイオニア株式会社 発光システム
US10995928B2 (en) 2016-04-25 2021-05-04 Pioneer Corporation Light emitting system

Also Published As

Publication number Publication date
AU4999100A (en) 2000-12-05

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