EP0907971A1 - Diodenadressiertes farbdisplay mit molekularem phosphor - Google Patents
Diodenadressiertes farbdisplay mit molekularem phosphorInfo
- Publication number
- EP0907971A1 EP0907971A1 EP98903244A EP98903244A EP0907971A1 EP 0907971 A1 EP0907971 A1 EP 0907971A1 EP 98903244 A EP98903244 A EP 98903244A EP 98903244 A EP98903244 A EP 98903244A EP 0907971 A1 EP0907971 A1 EP 0907971A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- diode
- diketonate
- phosphor
- addressed
- color
- 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- Withdrawn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
- C09K11/06—Luminescent materials, e.g. electroluminescent or chemiluminescent containing organic luminescent materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/18—Luminescent screens
- H01J29/20—Luminescent screens characterised by the luminescent material
-
- 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
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1029—Heterocyclic compounds characterised by ligands containing one nitrogen atom as the heteroatom
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
- H10H20/8512—Wavelength conversion materials
Definitions
- Diode-addressed color display with molecular phosphor Diode-addressed color display with molecular phosphor.
- the invention relates to a diode-addressed color display with a UV diode and a phosphor for illuminated displays, lights, solid-state image amplifiers, screens and monitors and others.
- Color displays for illuminated displays, luminaires, solid-state image intensifiers, screens and monitors are intended to reproduce color images true to color.
- the entire color information of a colored image is represented by information about the three primary colors red, green and blue.
- Additive color mixing can be used to produce any color or white from the three primary colors.
- This principle is used both by the conventional color television set with a tube from Braunschweig and by the various flat screen technologies such as plasma screens, electroluminescent screens and LCD displays.
- a color display is characterized by a high intrinsic emission quantum yield and a ligand-centered absorption in the range between 350 and 400 nm with a high extinction coefficient. According to photophysical considerations, these two phosphor properties are actually mutually exclusive. Surprisingly, however, it has been found that phosphors of the composition [Eu (diketonate) a X bl X ' b2 ] both
- the phosphors according to the invention are molecular compounds and therefore generally readily soluble in polar organic solvents. Their properties can therefore be easily examined in solution and the test results can be transferred to the solid state. The solubility in organic solvents also allows new design concepts for diode-addressed color displays.
- These europium complexes are charged and can be bound to a polymer support such as Nafion ® . As a result, these phosphors are particularly stable and the photophysical properties are further improved.
- the diode-addressed color display comprises a transparent polymeric coating which contains the phosphorus of the composition [Eu (diketonate) a X bl X ' b2 ] in solid solution.
- the coating is transparent because the light is not scattered on the dissolved phosphor particles.
- a color display consists of the UV diode and a transparent coating applied to it, which contains the phosphorus.
- the transparent coating can contain, for example, the phosphorus in a solid solution in a transparent matrix made of polyacrylate, epoxy resin or another polymer.
- LEDs are usually cast in epoxy housings, with the cast-on lens made of epoxy resin serving to improve the coupling out of the light from the diode.
- the phosphor can be used as
- the phosphorus is mixed with the epoxy resin and forms a solid solution with it.
- Large, two-dimensional displays can be easily manufactured by combining a diode array with the phosphor according to the invention.
- the diode array can be covered by a glass plate which is printed with fluorescent triplets, each with a red, green and blue glowing dot.
- the red glowing dot contains [Eu (diketonate) a X bl X ' b2 ] as phosphorus.
- the UV diode is in particular a UV diode made of InGaN or GaN and has its emission maximum between 370 and 410 nm with a half width FWHM ⁇ 50 nm.
- These complex coordination compounds of europium (III) contain Eu 3 + as the metal center, anions of a diketonate (diketonate) as charged ligands and pyridine or a pyridine derivative or 2,2'-bipyridine or a 2,2'-bipyridyl derivative as neutral ligands.
- the 2,2'-bipyridyl derivatives also include 1, 10-phenathroline and its derivatives. These coordination compounds have strong optical intraligand transitions and, in addition to absorbing the chelate ligands, are also effective as light antennas.
- the primary excitation by UV radiation leads to a ligand-centered excited state, the energy of which is transferred to the Europium ion in a subsequent step and leads to light emission there.
- the original ones remain in these connections
- Absorption properties of the ligands are largely preserved and the interligand change effects are weak.
- the coordinative saturation of the europium prevents the tendency towards polymerization of the compounds, which are therefore mononuclear.
- molecular phosphors are therefore composed of host lattices doped with activator ions.
- coordination compounds of europium with charged, anionic chelate ligands (diketonate) of the composition [Eu (diketonate) 3 ] are used, which as a rule are saturated by two or three further aquo ligands with the coordination number 8 or 9 are.
- Simple ligand substitution under mild conditions allows the introduction of a large number of uncharged organic ligands X, X 'to the product [Eu (diketonate) 3 X, X'].
- (Diketonate) can, for example, be an anion of the diketonates acac, thd, ttfa, fod, tfnb, dbm
- X can be, for example, pyridine or a pyridine derivative or bipyridine or a bipyridine derivative.
- Bipyridine derivatives are in particular also those compounds which are derived from 1,10-phenanthroline, such as, for example, dpphen, mphen, dmphen, tmphen, NOphen, Clphen, dppz (see formula scheme).
- the monodentate or bidentate ligands are chosen so that the europium ion is coordinated eight times.
- the reaction products are each obtained as a microcrystalline precipitate.
- the materials are recrystallized from ethanol for cleaning. 1st embodiment
- Neutral chelate ligands bpy 2,2'-bipyridine phen 1, 10-phenanthroline dpphen 4,7-diphenyl-l, 10-phenanthroline mphen 5-methyl-1, 10-phenanthroline dmphen 4, 7-dimethyl-1, 10 -phenantholin tmphen 3,4,7, 8-tetramethyl 1- 1, 10-phenanthroline NOphen 5-nitro-1, 10-phenanthroline Clphen 5-chloro-1, 10-phenanthroline dppz Dipyridinphenazin
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19708407 | 1997-03-03 | ||
| DE19708407 | 1997-03-03 | ||
| DE19802046A DE19802046A1 (de) | 1997-03-03 | 1998-01-21 | Diodenadressiertes Farbdisplay mit molekularem Phosphor |
| DE19802046 | 1998-01-21 | ||
| PCT/IB1998/000259 WO1998039806A1 (de) | 1997-03-03 | 1998-03-02 | Diodenadressiertes farbdisplay mit molekularem phosphor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0907971A1 true EP0907971A1 (de) | 1999-04-14 |
Family
ID=26034430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98903244A Withdrawn EP0907971A1 (de) | 1997-03-03 | 1998-03-02 | Diodenadressiertes farbdisplay mit molekularem phosphor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0907971A1 (de) |
| JP (1) | JP2000511586A (de) |
| WO (1) | WO1998039806A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6051925A (en) * | 1997-03-03 | 2000-04-18 | U.S. Philips Corporation | Diode-addressed color display with molecular phosphor |
| JP2002530826A (ja) * | 1998-11-26 | 2002-09-17 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 放電灯 |
| JP2002275182A (ja) * | 2001-03-22 | 2002-09-25 | Nippon Kayaku Co Ltd | 赤色蛍光材料およびそれを含有する組成物 |
| JP5327635B2 (ja) * | 2009-11-20 | 2013-10-30 | 国立大学法人神戸大学 | 膜状蛍光発光体およびその製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0826264B2 (ja) * | 1987-07-21 | 1996-03-13 | 三井東圧化学株式会社 | 発光性化合物を含有するインク組成物 |
| US5006503A (en) * | 1990-03-13 | 1991-04-09 | Eastman Kodak Company | Thermally-transferable fluorescent europium complexes |
| JPH05152609A (ja) * | 1991-11-25 | 1993-06-18 | Nichia Chem Ind Ltd | 発光ダイオード |
-
1998
- 1998-03-02 JP JP10529287A patent/JP2000511586A/ja not_active Abandoned
- 1998-03-02 EP EP98903244A patent/EP0907971A1/de not_active Withdrawn
- 1998-03-02 WO PCT/IB1998/000259 patent/WO1998039806A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9839806A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000511586A (ja) | 2000-09-05 |
| WO1998039806A1 (de) | 1998-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
| 17P | Request for examination filed |
Effective date: 19990311 |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PHILIPS CORPORATE INTELLECTUAL PROPERTY GMBH Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V. |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PHILIPS CORPORATE INTELLECTUAL PROPERTY GMBH Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V. |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH Owner name: KONINKLIJKE PHILIPS ELECTRONICS N.V. |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Effective date: 20061113 |