EP1779707A1 - Panneau electroluminescent et son procede de fabrication - Google Patents
Panneau electroluminescent et son procede de fabricationInfo
- Publication number
- EP1779707A1 EP1779707A1 EP05760949A EP05760949A EP1779707A1 EP 1779707 A1 EP1779707 A1 EP 1779707A1 EP 05760949 A EP05760949 A EP 05760949A EP 05760949 A EP05760949 A EP 05760949A EP 1779707 A1 EP1779707 A1 EP 1779707A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- dielectric
- active layer
- panel
- binder
- 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- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent materials, e.g. electroluminescent or chemiluminescent
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
-
- 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 [2D] radiating surfaces
- H05B33/20—Light sources with substantially two-dimensional [2D] radiating surfaces characterised by the chemical or physical composition or the arrangement of the material in which the electroluminescent material is embedded
Definitions
- the present invention relates to the field of electroluminescent light sources (EL). More particularly, it relates to an electroluminescent panel and a method for making it.
- EL electroluminescent light sources
- the principle of electroluminescence is widely known. It is based on the fact that some substances emit light when subjected to a voltage.
- FIG. 1 An assembly 10 consisting of an active layer 11 superimposed on a dielectric layer 12 of the same dimension is contained in two electrodes, a 13 at the back and a 14 at the front of the panel. These are connected to a generator 15 and apply an electrical voltage to the assembly 10. Finally, two layers 16 of transparent laminate constitute the outer faces of the panel and protect the functional parts.
- the active layer and the dielectric each contain various active substances known to those skilled in the art, mixed with a binder, more generally referred to as binder.
- the bottom electrode 13 is composed of metallizations which make it rigid.
- the profile of the panel obtained can not be adapted to any support, such as a curved wall.
- this electrode is formed by a thin sheet of metal. This makes it possible to have a panel of a certain flexibility, but this solution is particularly difficult and costly to implement for large panels.
- WO 01/15496 describes the possibility of using a single binder for the different layers constituting the EL panel.
- the present invention aims to provide a panel whose operating qualities are significantly improved, particularly through an optimization of the binder composition, and whose use is more flexible.
- the invention also proposes a method for obtaining such a panel. More specifically, the invention relates to a light-emitting panel of the type comprising an assembly consisting of a dielectric and an active layer, and a first and a second electrode located respectively on the bottom and the front side of the panel, intended to be connected to a voltage generator.
- the second electrode is made of a transparent material.
- the dielectric, the active layer and the said first electrode each comprise an active substance and dry residues of an identical binder for the dielectric, the active layer and the first electrode.
- the binder is composed of:
- the bottom electrode comprises a layer whose active substance is polyaniline and / or a layer whose active substance is another conductive material.
- the invention also relates to a method for manufacturing an EL panel, comprising:
- the panel may also be manufactured by a process which consists in: - obtaining an inert support, deposit the first electrode on this support,
- the deposition operations are done by screen printing.
- the invention also relates to the use of a binder in the manufacture of an EL panel.
- This binder is the only binder used in the manufacture of said panel. It comprises: between 60 and 70% of a mixture of solvents,
- the EL panel comprises an assembly 10 consisting of an active layer 11 and a dielectric 12 ( Figure 2).
- the active layer 11 is prepared from a paste comprising doped zinc sulfide called "phosphorus", a binder and usual adjuvants, such as solvents, dispersants or setting retarders.
- phosphorus doped zinc sulfide
- binder a binder
- adjuvants such as solvents, dispersants or setting retarders.
- pigments may be added to modify the spectrum of the light emitted by the layer.
- the active layer 11 comprises between 65 and 95%, typically 88%, of phosphorus, and between 35 and 5%, typically 12%, of an organic matrix comprising the dry residues of the binder and the various compounds present. in the dough.
- the dielectric 12 is prepared from a paste comprising barium titanate, a binder and the usual adjuvants. After removal of the solvents, dielectric comprises between 65 and 95%, typically 85%, of barium titanate, and between 35 and 5%, typically 15%, of an organic matrix comprising the dry residues of the binder and the various compounds present in the dough.
- a first electrode 13 is superimposed on the assembly 10, on the bottom side of the panel. It comprises a layer 13a prepared from a paste comprising silver powder, a bi ⁇ der and the usual adjuvants.
- the electrode 13 After elimination of the solvents, the electrode 13 comprises between 65 and 95%, typically 85%, of silver, and between 35 and 5%, typically 15%, of an organic matrix comprising the dry residues of the binder and of the various compounds present in the dough.
- Silver can be replaced by different conductive materials, such as copper or even graphite for small electrodes.
- a layer 13b prepared from a paste comprising polyaniline, a binder and the usual adjuvants may optionally be substituted for or added to the layer 13a.
- the polyaniline layer is deposited indifferently on one side or the other of the silver layer.
- the assembly 10 is covered, on the front side of the panel, by a second electrode 14.
- This may consist of a transparent conductive layer disposed on a support.
- the materials chosen for the electrode and the support must be conductive, transparent to the light emitted by the assembly 10 and have a good affinity with each other. For example, it may be a layer of indium oxide and tin deposited on a polyester support.
- the electrode can not only be conductive and transparent, but still flexible.
- it may consist of a varnish loaded with indium and tin oxide applied directly to the dielectric 11 or by a layer of fine particles of silver or oxide of zinc deposited on a support, for example polyester.
- the panel obtained is perfectly conformable to the surface on which it is affixed.
- the electrodes 13 and 14 are intended to be connected to a generator 15 for applying an electric voltage to the assembly 10.
- one or two protective sheets 16 insulate the electrodes from external aggressions.
- a transparent film 17 carrying the pattern that the panel must illuminate is disposed according to known techniques on the protective sheet 16 located at the front of the panel.
- the pattern can also be printed directly on the front electrode 14.
- the overall thickness of the panel, without protective sheet, is typically between 0.3 and 5mm.
- the binder used to form the pastes is the same for the dielectric 12, for the active layer 11 and for the bottom electrode 13.
- it comprises:
- the solvent mixture is composed of:
- the active layer 11 was prepared from a paste composed of 72% of phosphorus and 28% of binder to which pigments are added to form a mixture comprising 71.20% g of phosphorus, 27.70% of binder 0.58% orange pigment, 0.52% pink pigment;
- the dielectric 12 was prepared with a paste composed of 66% barium titanate, 34% binder; and the bottom electrode was prepared with a paste composed of 66% silver powder, 34% binder.
- half-life is the time required for the brightness to decrease by half.
- the various layers are formed and assembled by screen printing.
- This technique is known to those skilled in the art and will not be described in detail. It will simply be noted that it consists, for fixing a layer on a substrate, to apply the constituent mixture of said layer on a specific mesh fabric, disposed on the substrate.
- the viscosity of the mixture is such that by applying a pressure, it passes through the fabric and is distributed uniformly on the substrate. After drying, the layer adheres to the substrate.
- the order of mounting of the layers may be as follows: front electrode 14, active layer 11, dielectric 12 and rear electrode 13. These layers are dried, one after the other, after each application, all together, at the end.
- the order of assembly may be: back electrode, dielectric, active layer, front electrode. In this case, an inert support serves as the basis for the application of the back electrode.
- the one or more protective sheets 16 and the film 17 carrying the pattern are arranged as explained above, according to the techniques known to those skilled in the art.
- the two above-mentioned mounting variants can also be applied to cases where the rear electrode comprises a silver-based layer and / or a polyaniline-based layer.
- the bottom electrode 13, based on silver and / or polyaniline, can be deposited by screen printing, the layer obtained is flexible. As is the case for all other layers, particularly when the front electrode 14 is flexible, the panel perfectly matches the shape of the support on which it is affixed, which is an important advantage of the invention.
- the composition of the dielectric used makes it possible to apply it at one time. The insulation it provides is sufficient and the disadvantage of EL panels having multiple layers of dielectric, namely a shorter life, is avoided.
- the above method does not require special precautions for its implementation.
- the use of a clean room is not essential, contrary to the usual use.
- the industrial production of EL panels according to the invention is therefore greatly facilitated.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05760949A EP1779707A1 (fr) | 2004-07-14 | 2005-07-08 | Panneau electroluminescent et son procede de fabrication |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP04405447A EP1617709A1 (fr) | 2004-07-14 | 2004-07-14 | Panneau électroluminescent et son procédé de fabrication |
| PCT/EP2005/053293 WO2006005735A1 (fr) | 2004-07-14 | 2005-07-08 | Panneau electroluminescent et son procede de fabrication |
| EP05760949A EP1779707A1 (fr) | 2004-07-14 | 2005-07-08 | Panneau electroluminescent et son procede de fabrication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1779707A1 true EP1779707A1 (fr) | 2007-05-02 |
Family
ID=34932197
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04405447A Withdrawn EP1617709A1 (fr) | 2004-07-14 | 2004-07-14 | Panneau électroluminescent et son procédé de fabrication |
| EP05760949A Withdrawn EP1779707A1 (fr) | 2004-07-14 | 2005-07-08 | Panneau electroluminescent et son procede de fabrication |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04405447A Withdrawn EP1617709A1 (fr) | 2004-07-14 | 2004-07-14 | Panneau électroluminescent et son procédé de fabrication |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20080303413A1 (fr) |
| EP (2) | EP1617709A1 (fr) |
| JP (1) | JP2008507083A (fr) |
| WO (1) | WO2006005735A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102941187B1 (ko) * | 2025-06-10 | 2026-03-19 | 주식회사 제이비랩 | El 면발광 노면 표시 장치 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5470894A (en) * | 1992-02-18 | 1995-11-28 | Patel; Naresh D. | Low VOC (volatile organic compounds), solvent-based CPVC pipe adhesives which maintain joint adhesive performance |
| US5252634A (en) * | 1992-02-18 | 1993-10-12 | Patel Naresh D | Low VOC (volatile organic compounds), solvent-based thermoplastic pipe adhesives which maintain joint adhesive performance |
| US5976613A (en) * | 1993-08-03 | 1999-11-02 | Janusauskas; Albert | Method of making an electroluminescent lamp |
| US5856031A (en) * | 1996-05-30 | 1999-01-05 | E.L. Specialists, Inc. | EL lamp system in kit form |
| GB9713074D0 (en) * | 1997-06-21 | 1997-08-27 | Cambridge Display Tech Ltd | Electrically-conducting colour filters for use in organic light-emitting displays |
| US6445128B1 (en) * | 1999-08-23 | 2002-09-03 | Durel Corporation | EL panel made with low molecular weight PVDF/HFP resin |
-
2004
- 2004-07-14 EP EP04405447A patent/EP1617709A1/fr not_active Withdrawn
-
2005
- 2005-07-08 US US11/631,982 patent/US20080303413A1/en not_active Abandoned
- 2005-07-08 JP JP2007520822A patent/JP2008507083A/ja not_active Abandoned
- 2005-07-08 EP EP05760949A patent/EP1779707A1/fr not_active Withdrawn
- 2005-07-08 WO PCT/EP2005/053293 patent/WO2006005735A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006005735A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006005735A1 (fr) | 2006-01-19 |
| EP1617709A1 (fr) | 2006-01-18 |
| JP2008507083A (ja) | 2008-03-06 |
| US20080303413A1 (en) | 2008-12-11 |
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