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WO2008011097A1 - Lampe électroluminescente - Google Patents

Lampe électroluminescente Download PDF

Info

Publication number
WO2008011097A1
WO2008011097A1 PCT/US2007/016361 US2007016361W WO2008011097A1 WO 2008011097 A1 WO2008011097 A1 WO 2008011097A1 US 2007016361 W US2007016361 W US 2007016361W WO 2008011097 A1 WO2008011097 A1 WO 2008011097A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
electroluminescent
adhesive
substrate
electroluminescent lamp
Prior art date
Application number
PCT/US2007/016361
Other languages
English (en)
Inventor
Michael Zeng
Jacky Chen
Ky Lee
Original Assignee
Molex Incorporated
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 Molex Incorporated filed Critical Molex Incorporated
Publication of WO2008011097A1 publication Critical patent/WO2008011097A1/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
    • H05B33/02—Details
    • H05B33/04—Sealing arrangements, e.g. against humidity
    • 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

Definitions

  • the present invention relates to an electroluminescent lamp and its combination with a metal key panel, as well as a method for manufacturing the electroluminescent lamp, and more particularly to an electroluminescent lamp which is resistant to damage and easy to be adhered to another electronic element, and its combination with a metal key panel as well as a method for manufacturing the electroluminescent lamp.
  • electroluminescence technology which was formerly used merely in aircraft cockpits, has become broadly used for various civilian high technology consumer electronic products, such as mobile phones, pagers, wireless telephones, personal digital assistants, remote controllers, and so on. Because electroluminescent lamps have characteristics such as small size, low weight, low temperature, low power consumption, non-flickering, uniform luminescence, etc., they are gradually replacing backlight means of conventional light emitting diodes (LEDs).
  • LEDs light emitting diodes
  • FIG. 6 showing an electroluminescent system of a monolithic structure provided by U.S. Patent No. 5,856,029, which discloses an electroluminescent lamp comprising a rear electrode layer 16, a dielectric layer 15, an electroluminescent layer 14, a translucent electrode layer 13, a cover layer 12 and a bus bar 11.
  • the rear electrode layer 16 is printed on a substrate 17 (such as a clothing) consisting of a textile fabric; then, the dielectric layer 15, the electroluminescent layer 14 and the translucent electrode layer 13 are sequentially printed thereon; afterward, the bus bar 11 is printed on the translucent electrode layer 13 in the form of a loop; and finally, the cover layer 12 is printed so as to be adhered to the substrate 17.
  • this electroluminescent lamp is directly printed on a final product such as an article of clothing
  • the electroluminescent system is directly printed on an electronic product in a similar way, production would be seriously hindered because the electronic product may not readily withstand circumstances such as high temperature, baking, and so on as well as other activities utilized during the printing process.
  • it is desirably to produce the electroluminescent system as a single product and then transfer it to the electronic product.
  • FIGs. 7 and 8 for another electroluminescent lamp, Chinese Patent Application No. 99125456.2 (corresponding to U.S. Patent Nos. 5,856,030 and 6,270,834) discloses a method for manufacturing an electroluminescent lamp.
  • the electroluminescent lamp is printed on a transfer release paper 102 and comprises a first envelope layer 104, an Indium Tin Oxide (ITO) layer 106, a front bus bar 107, an electroluminescent layer 108, a dielectric layer 110, a rear electrode layer 112 and a second envelope layer 114.
  • the transfer release paper 102 is used as a substrate during printing, and the rest of the aforementioned layers are sequentially printed on the transfer release paper 102, so the electroluminescent lamp can be produced as a single product.
  • ITO Indium Tin Oxide
  • adhering the electroluminescent lamp to the electronic product can be implemented only by coating an adhesive layer 116 on the second envelope layer 114 in advance, and adhering the adhesive layer 116, together with the electroluminescent lamp, to the electronic product, then peeling off the transfer release paper 102. That makes it inconvenient to use.
  • this electroluminescent lamp is integrally formed by ink printing, its strength is relatively low and it is prone to be damaged at the time of being stretched by an external force.
  • this electroluminescent lamp is applied to a mobile phone (not shown), it contacts with keys of the mobile phone via an external surface of the first envelope layer 104.
  • the first envelope layer 104 is formed by printing a layer of insulating ink which has a relatively low strength, so it is prone to be damaged after a long period of use cooperating with the mobile phone.
  • a purpose of the invention is to provide an electroluminescent lamp which is resistant to damage and easy to be adhered to another electronic element, and a manufacturing method thereof.
  • Another purpose of the invention is to provide a combination of an electroluminescent lamp with a metal key panel, which is resistant to damage and easy to be adhered to a circuit board of a mobile phone.
  • the invention provides an electroluminescent lamp, comprising a substrate, an electroluminescent system printed on a side of the substrate and an insulating protection layer covering an external surface of the electroluminescent system, the electroluminescent lamp further comprising a first adhesive layer and a releasable paper disposed outside of the insulating protection layer, wherein the substrate is a transparent polyester film; the electroluminescent system is provided with a transparent conducting layer, a bus bar, an electroluminescent layer, a dielectric layer and a rear electrode layer sequentially from the side of the substrate to the outside; and lights emitted from the electroluminescent layer transmit outward by passing through the transparent conducting layer and the substrate.
  • the bus bar and the transparent conducting layer are electrically conductive with each other.
  • the invention provides a combination of an electroluminescent lamp and a metal key panel.
  • the combination of the electroluminescent lamp and the metal key panel is produced, on the basis of the electroluminescent lamp according to the invention, by removing the release paper and adding a metal key panel, a second adhesive layer and a releasable paper adhered to the first adhesive layer.
  • the invention further provides a method for manufacturing the electroluminescent lamp, comprising steps of: step 1 : providing a substrate of a transparent polyester film; step 2: printing an electroluminescent system to be laminated on a surface of the substrate, the step 2 further comprising steps of: step 2a: printing a transparent conducting layer on the substrate; step 2b: printing an electroluminescent layer to be laminated on the transparent conducting layer, the electroluminescent layer having a second opening disposed therein; step 2c: printing a dielectric layer to be laminated on the electroluminescent layer, the dielectric layer having also a second opening correspondingly disposed therein; step 2d: printing a rear electrode layer to be laminated on the dielectric layer, the rear electrode layer having also a second opening correspondingly disposed therein; step 3: printing an insulating protection layer on the rear electrode layer, the insulating protection layer, as an envelope layer of the electroluminescent system, enveloping the electroluminescent system to the substrate, and having a first opening and a
  • the invention has the following advantageous effects: since the insulating protection layer of the electroluminescent lamp according to the invention is adhered to the substrate so as to tightly seal the electroluminescent system sandwiched between the insulating protection layer and the substrate, no air, moisture, or dust can enter therein; moreover, since it is unnecessary to peel off the substrate when assembling it to another product, the step of printing an envelope layer of the prior art can be omitted, thereby simplifying the process and reducing the material used; since the electroluminescent lamp has a first adhesive layer and a releasable paper disposed therein, the electroluminescent lamp can be handled as an independent product for shipment and transportation, and when being assembled, the electroluminescent lamp can be directly adhered to a circuit board of a mobile phone so long as the releasable paper is peeled off, which is easily and conveniently accomplished.
  • the bottom surface of the electroluminescent lamp is a substrate consisting of a polyester film.
  • the durability is greatly enhanced, and additionally, the tensile strength of the electroluminescent lamp is improved.
  • Fig. 1 is a perspective view of an electroluminescent lamp according to the invention
  • Fig. 2 is a sectional view of Fig. 1 ;
  • Fig. 3 is a schematic diagram of a metal key panel according to the invention
  • Fig. 4 is a sectional view of a combination of an electroluminescent lamp and a metal key panel according to the invention
  • Fig. 5 is a schematic diagram of the combination of the electroluminescent lamp and the metal key panel according to the invention in the case of being applied to a mobile phone;
  • Fig. 6 is a sectional view of an electroluminescent lamp of the prior art
  • Fig. 7 is a perspective view of another electroluminescent lamp of the prior art
  • Fig. 8 is a sectional view of Fig. 7.
  • the invention provides an electroluminescent lamp which can be mounted on a backlight keyboard panel of a mobile phone or other electronic equipment.
  • the electroluminescent lamp comprises a transparent substrate 1 as well as an electroluminescent system (EL system) (not numbered) printed on an upper surface of the substrate 1, an insulating protection layer (dielectric layer) 3, a first adhesive layer 4 and a back adhesive protection layer 5.
  • EL system electroluminescent system
  • the electroluminescent system is provided with a transparent conducting layer 21, a bus bar 22, an electroluminescent layer 23, a dielectric layer 24 and a rear electrode layer 25 sequentially disposed from bottom to top on a side of the substrate 1.
  • the respective layers of the electroluminescent system are printed on the substrate 1 to be laminated sequentially by means of screen printing.
  • the printing can be performed by means of roller printing or other methods.
  • the substrate 1 is a piece of polyester (PET) film which is a soft and flexible film.
  • the substrate 1 has a relatively high tensile strength, such that the electroluminescent lamp is not easy to be damaged.
  • the substrate 1 is designed as colorless and transparent, and of course it can be designed, for example, as red and transparent, blue and transparent, and so on, depending on practical requirements.
  • the substrate 1 has a relatively high transmittance, such that lights emitted from the electroluminescent layer 23 can transmit easily through the substrate 1 and the transparent conducting layer 21.
  • the transparent conducting layer 21 is printed on an upper surface of the substrate 1, and is formed by printing a layer of transparent conductive ink such as Indium Tin Oxide (ITO) to be laminated on the substrate 1.
  • the bus bar 22 is a loop of filament printed on an upper surface of the transparent conducting layer 21 by using a silver-containing ink.
  • the bus bar 22 is electrically conductive with the transparent conducting layer 21, which can enhance electrical conductivity of the transparent conducting layer 21.
  • the electroluminescent layer 23 is formed by printing a mixture of a phosphor powder and an adhesive to be laminated on the bus bar 22.
  • the rear electrode layer 25 and the transparent conducting layer 21 will function as two electrodes of a capacitor, so the phosphor powder of the electroluminescent layer 23 will emit light under excitation of an alternating electric field.
  • the dielectric layer 24 has a characteristic of relatively high insulation, and is formed by printing an insulating ink such as barium titanate to be laminated on the electroluminescent layer 23. In this design, the dielectric layer 24 presents white color and it can reflect lights emitted from the electroluminescent layer 23, such that lights emitted from the electroluminescent layer 23 can only transmit out by passing through the transparent conducting layer 21 and the substrate 1.
  • the rear electrode layer 25 is formed by directly printing a layer of non-transparent conductive ink such as silver ink or carbon ink to be laminated on the dielectric layer 24.
  • the electroluminescent lamp has a first opening 28 and a second opening 29 disposed therein.
  • the first opening 28 communicates with the rear electrode layer 25 after passing through the first adhesive layer 4 and the insulating protection layer 3.
  • the second opening 29 communicates with the bus bar 22 after passing through the first adhesive layer 4, the insulating protection layer 3, the rear electrode layer 25, the dielectric layer 24 and the electroluminescent layer 23.
  • the insulating protection layer 3 is formed by printing a waterproof and dustproof ink (such as polyurethane) on the rear electrode layer 25.
  • the insulating protection layer 3 is adhered to the substrate 1 to be used as an envelope layer of the electroluminescent system, so as to tightly seal the electroluminescent system between the insulating protection layer 3 and the substrate 1 , such that air, moisture or dust, which reduces the luminescent life of the lamp, is prevented from entering the electroluminescent lamp.
  • the first adhesive layer 4 is a layer of self-adhesive coated on the insulating protection layer 3.
  • the back adhesive protection layer 5 is a releasable paper.
  • the back adhesive protection layer 5 is disposed on the first adhesive layer 4, for preventing the first adhesive layer 4 from being contaminated by the environment.
  • the electroluminescent lamp can be adhered to another electronic element such as a metal key panel so long as the release paper is peeled off to expose the first adhesive layer 4.
  • the invention further provides a combination of the electroluminescent lamp and a metal key panel, which can be mounted on a circuit board of a mobile phone or other personal electronic devices (not shown).
  • the combination of the electroluminescent lamp and the metal key panel is produced, on the basis of the electroluminescent lamp described above, by removing the back adhesive protection layer 5 and adding a metal key panel 6, a second adhesive layer 7 and a back adhesive protection layer 8.
  • the metal key panel 6 comprises a spacer 62 and a plurality of metal keys 66.
  • a plurality of circular receiving grooves 64 are disposed in the spacer 62. These receiving grooves 64 are connected by a plurality of air escaping channels 65.
  • These metal keys 66 are metal plates presenting a dome shape, and are respectively received within theses receiving grooves 64. The air expelled at the time of pressing the metal keys 66 can be discharged via the air escaping channels 65, so as to improve hand feeling at the time of pressing.
  • the second adhesive layer 7 is a layer of self-adhesive directly coated on a surface of the spacer 62.
  • the back adhesive protection layer 8 is disposed on the second adhesive layer 7.
  • the back adhesive protection layer 8 is a releasable paper.
  • the back adhesive protection layer 8 is disposed at an outside of the second adhesive layer 7, so as to prevent the second adhesive layer 7 from being contaminated by the environment.
  • the combination of the electroluminescent lamp and the metal key panel has a first opening 28 and a second opening 29 disposed therein.
  • the first opening 28 communicates with the rear electrode layer 25 after passing through the second adhesive layer 7, the spacer 62, the first adhesive layer 4 and the insulating protection layer 3.
  • the second opening 29 communicates with the bus bar 22 after passing through the second adhesive layer 7, the spacer 62, the first adhesive layer 4, the insulating protection layer 3, the rear electrode layer 25, the dielectric layer 24 and the electroluminescent layer 23.
  • the combination of the electroluminescent lamp and the metal key panel can be adhered to a circuit board 9 of a mobile phone so long as the back adhesive protection layer 8 is peeled off to expose the second adhesive layer 7.
  • Two conducting contacts 92, 94 on the circuit board 9 respectively extend into the first opening 28 and the second opening 29, so as to be electrically conductive with the rear electrode layer 25 and the bus bar 22 directly.
  • the bottom surface of the combination of the electroluminescent lamp and the metal key panel according to the invention is a substrate 1 consisting of a polyester film.
  • the substrate 1 has a relatively high mechanical strength, providing a relatively long service life when being used cooperatively with keys 122 of the mobile phone.
  • the electroluminescent lamp and its combination with the metal key panel can be handled as an independent product for shipment and transportation, because of the arrangement of the back adhesive protection layers 5, 8. In use, adhering can be performed only after the back adhesive protection layers 5, 8 are peeled off, which is easily and conveniently done.
  • the bus bar 22 can be omitted.
  • the invention also provides a method for manufacturing the above electroluminescent lamp, comprising the following steps: step 1 : providing a substrate 1 of a transparent polyester film; step 2: printing an electroluminescent system to be laminated on an upper surface of the substrate 1; the step 2 further comprises the following steps: printing a transparent conducting layer 21 to be laminated on the substrate 1 by using an electrically conductive ink of indium tin oxide; printing a loop of bus bar 22 on the transparent conducting layer 21 by using a silver ink; printing an electroluminescent layer 23 to be laminated on the bus bar 22 by using a mixture of a phosphor powder and an adhesive, the electroluminescent layer 23 having a second opening 29 which communicates with the bus bar 22; printing a dielectric layer 24 to be laminated on the electroluminescent layer 23 by using an insulating ink such as barium titanate, the dielectric layer 24 having a second opening 29 correspondingly disposed therein; printing a rear electrode layer 25 to be laminated on the dielectric layer 24 by using a
  • step 5 providing a metal key panel 6 which comprises a spacer 62 and a plurality of metal keys 66, a plurality of receiving grooves 64 being disposed in the spacer 62, the metal keys 66 being correspondingly received in the receiving grooves 64 of the spacer, wherein a second adhesive layer 7 is disposed outside of the spacer 62 of the metal key panel 6, a first opening 28 and a second opening 29 are also correspondingly disposed in the spacer 62 and the second adhesive layer 7, and a back adhesive protection layer 8 is further disposed at an outside of the second adhesive layer 7 for preventing the second adhesive layer 7 from being contaminated by the environment; and step 6: adhering an inner side of the spacer 62 of the metal key panel 6 to the first adhesive layer 4 of the electroluminescent lamp, so as to form a combination of the electrolum

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  • Electroluminescent Light Sources (AREA)
  • Push-Button Switches (AREA)

Abstract

L'invention concerne une combinaison formée par une lampe électroluminescente et un clavier métallique, comprenant un substrat, un système électroluminescent imprimé sur un côté du substrat, une couche de protection isolante recouvrant une surface extérieure du système électroluminescent, une première couche adhésive disposée sur la couche de protection isolante et un clavier métallique collé sur cette première couche adhésive, le clavier métallique comprenant un élément d'espacement et une pluralité de touches métalliques. L'invention se caractérise en ce que cette combinaison comprend également une seconde couche adhésive et un papier antiadhésif disposé à l'extérieur du clavier métallique, le substrat étant un film de polyester transparent. Le système électroluminescent comporte une couche conductrice transparente, une couche électroluminescente, une couche diélectrique et une couche d'électrode arrière, dans cet ordre depuis le côté du substrat jusqu'à l'extérieur. La lumière émise à partir de la couche électroluminescente est transmise par passage à travers la couche conductrice transparente et le substrat. La combinaison formée par cette lampe électroluminescente et ce clavier métallique se caractérise avantageusement par sa résistance à l'endommagement et par sa facilité de collage sur une carte de circuit imprimé. L'invention concerne également la lampe électroluminescente ainsi qu'un procédé de fabrication de celle-ci.
PCT/US2007/016361 2006-07-20 2007-07-19 Lampe électroluminescente WO2008011097A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNA2006101075227A CN101110471A (zh) 2006-07-20 2006-07-20 电致发光灯以及其与金属按键板的组合以及其制造方法
CN200610107522.7 2006-07-20

Publications (1)

Publication Number Publication Date
WO2008011097A1 true WO2008011097A1 (fr) 2008-01-24

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Application Number Title Priority Date Filing Date
PCT/US2007/016361 WO2008011097A1 (fr) 2006-07-20 2007-07-19 Lampe électroluminescente

Country Status (2)

Country Link
CN (1) CN101110471A (fr)
WO (1) WO2008011097A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103152891B (zh) * 2013-02-16 2015-10-28 上海科润光电技术有限公司 一种无机粉末电致发光柔性矩阵显示器
WO2015032090A1 (fr) * 2013-09-09 2015-03-12 Xu Rui Combinaison d'une lampe électroluminescente et d'une feuille à dômes en métal
CN111356256A (zh) * 2018-12-20 2020-06-30 亨亮光电科技股份有限公司 具延展性的电致发光结构及其产品

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018378A1 (fr) * 1990-05-15 1991-11-28 Australian Postal Corporation Trading As Australia Post Timbres
WO1993021620A1 (fr) * 1992-04-10 1993-10-28 Sprintpak Pty. Ltd. Timbres-poste
WO1998030069A1 (fr) * 1996-12-30 1998-07-09 E.L. Specialists, Inc. Lampe electroluminescente elastomere
EP0905668A1 (fr) * 1997-09-26 1999-03-31 James Arthur Phillips Dispositif d'affichage avec matériau luminescent
EP1265261A2 (fr) * 2001-05-22 2002-12-11 Youeal Electronics Co., Ltd. Clavier pour téléphone mobile comprenant un élément electroluminescent
KR20040077579A (ko) * 2004-06-30 2004-09-04 주식회사 삼도휴먼텍 메탈 돔 일체형 이엘 램프
EP1513164A2 (fr) * 2003-09-08 2005-03-09 Polymatech Co., Ltd. Composants électronique électroluminescent

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991018378A1 (fr) * 1990-05-15 1991-11-28 Australian Postal Corporation Trading As Australia Post Timbres
WO1993021620A1 (fr) * 1992-04-10 1993-10-28 Sprintpak Pty. Ltd. Timbres-poste
WO1998030069A1 (fr) * 1996-12-30 1998-07-09 E.L. Specialists, Inc. Lampe electroluminescente elastomere
EP0905668A1 (fr) * 1997-09-26 1999-03-31 James Arthur Phillips Dispositif d'affichage avec matériau luminescent
EP1265261A2 (fr) * 2001-05-22 2002-12-11 Youeal Electronics Co., Ltd. Clavier pour téléphone mobile comprenant un élément electroluminescent
EP1513164A2 (fr) * 2003-09-08 2005-03-09 Polymatech Co., Ltd. Composants électronique électroluminescent
KR20040077579A (ko) * 2004-06-30 2004-09-04 주식회사 삼도휴먼텍 메탈 돔 일체형 이엘 램프

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