CN1084690A - Electroluminescent device - Google Patents
Electroluminescent device Download PDFInfo
- Publication number
- CN1084690A CN1084690A CN93109130A CN93109130A CN1084690A CN 1084690 A CN1084690 A CN 1084690A CN 93109130 A CN93109130 A CN 93109130A CN 93109130 A CN93109130 A CN 93109130A CN 1084690 A CN1084690 A CN 1084690A
- Authority
- CN
- China
- Prior art keywords
- light
- fluorescence
- emitting area
- transparent resin
- converter filter
- 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.)
- Pending
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Classifications
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- 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
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
- H05B33/145—Arrangements of the electroluminescent material
-
- 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
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
-
- 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
-
- 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
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
A kind of electroluminescent device with a light-emitting area, comprise that one deck can produce fluorescence when being subjected to a voltage drive and it is radiated at fluorophor on this light-emitting area, and a chromatic light converter filter, fluorescence is converted to a kind of light or a kind of color of the color that is different from fluorescence.This chromatic light converter filter is arranged on the light-emitting area of electroluminescent device.This chromatic light converter filter is the thin film of being made by a kind of transparent resin and the organic fluorescent pigment that mixes with transparent resin.This electroluminescent device can be used for outdoor economically.
Description
The present invention relates to a kind of electroluminescent device, relate more specifically to wherein comprise a kind of electroluminescent device of the light-emitting area that is used to produce a chromatic light converter filter with desired color.
Fig. 3 illustrates first kind of prior art electroluminescent (EL) plate 90 of not being with chromatic light converter filter.In order to launch white light, the transparency electrode 92 that EL plate 90 comprises a backplate 91, be arranged in parallel with backplate 91, be clipped in luminescent layer 93 between them, luminescent layer 93 and make by fluorophor 93a and a kind of organic fluorescent pigment 93b of mixing with fluorophor 93a.
Thereby organic fluorescent pigment 93b is mixed the luminous efficiency that the packing ratio that has at first reduced fluorophor 93a in the luminescent layer 93 has reduced luminescent layer 93 with fluorophor 93a, thus secondly significantly loss organic fluorescent pigment 93b shortened the working life of EL plate 90 significantly.
Fig. 4 shows second kind of prior art EL plate eliminating above-mentioned shortcoming in the EL plate 90.This EL plate 80 comprise a backplate 81, with a transparency electrode 82 of backplate 81 configured in parallel, a luminescent layer 83 made from fluorophor 83a only, and attached to a chromatic light converter filter 84 on the light-emitting area of EL plate 80.Chromatic light converter filter 84 comprises the film 84a of layer of transparent resin (such as terephthalate), be added in one deck organic fluorescent pigment film 84b on the inner surface of transparent membrane 84a by methods such as printings, block film 84c attached to one deck ultraviolet ray on the outer surface of transparent membrane 84a.
Second kind of prior art EL plate 80 improved the life-span of luminous efficiency and organic fluorescent pigment 84b.On the other hand, film 84c can only guarantee EL plate 80 2 hundred days (about 7 months) at the most in outdoor exposure test working life is blocked in ultraviolet ray.This means from considering that economically this EL plate 80 can not be used for outdoor.
Thereby one object of the present invention prolongs the El element in the life-span of El element for a kind of life-span that can prolong organic fluorescent pigment is provided.
A first aspect of the present invention is a kind of electroluminescent device with light-emitting area, it comprises one deck fluorophor, when this one deck fluorophor is subjected to the excitation of a voltage, can produce fluorescence and fluorescence is radiated on the light-emitting area, and a chromatic light converter filter, fluorescence is converted to the light of the color different with the original color of fluorescence.This chromatic light converter filter be arranged on light-emitting area one side of electroluminescent device and comprise the film that layer of transparent resin and the organic fluorescent pigment that mixes with transparent resin are made.
A second aspect of the present invention is a kind of electroluminescent cell, comprise plate shape overcoat with a transparent planar section, the outer surface of transparent flat part constitutes the light-emitting area of this electroluminescent cell, be encapsulated in one deck fluorophor in the described overcoat, when being subjected to the excitation of a voltage, this layer fluorophor can produce fluorescence and fluorescence is radiated on the light-emitting area, and a chromatic light converter filter, fluorescence converted to the light of the color of the original color that is different from fluorescence.This chromatic light converter filter be attached on the light-emitting area and comprise the film that layer of transparent resin and the organic fluorescent pigment that mixes with transparent resin are made.
Because organic fluorescent pigment mixes with transparent resin, thereby transparent resin has prevented the wearing out of organic fluorescent pigment that is caused by ultraviolet radiation and life-span or the durability that has prolonged organic fluorescent pigment with the particle and the isolate from outer air of organic fluorescent pigment.Like this, this creationary El element can be used for outdoor economically.
Other purpose of the present invention and advantage will be conspicuous in below in conjunction with the discussion of the description of the drawings.
Fig. 1 is the cutaway view of an EL plate according to an embodiment of the invention;
Fig. 2 is the curve that shows the daylight exposure test result of the EL plate of Fig. 1 and prior art EL plate;
Fig. 3 is the cutaway view of first kind of prior art EL plate; And
Fig. 4 is the cutaway view of second kind of prior art EL plate.
A preferred embodiment of the present invention is described with reference to the accompanying drawings.
An EL plate 1 according to an embodiment of the invention comprise a backplate 2, and a transparency electrode 3 be arrangeding in parallel of backplate 2, be clipped between them and luminescent layer 4 all making by fluorophor 4a and light-emitting area attached to EL plate 1 on be used for spontaneous photosphere 4 in future fluorescence convert a color conversion device color filter plate 5 of white light to.This color conversion device color filter plate 5 comprises thin film or lamination, wherein has a kind of organic fluorescent pigment 5b and a kind of transparent resin matrix 5a fusion (such as acrylic resin) of the high grade of transparency relatively or is dispersed in equably among the matrix 5a of transparent resin.Thereby this color conversion device color filter plate 5 has and a structure that the colourful transparent resin film is substantially the same.This EL plate 1 also comprises an insulating barrier 6 and the moistureproof mantle 7 of one deck.Insulating barrier 6 is clipped in and prevents short circuit between backplate 2 and the transparency electrode 3 between luminescent layer 4 and the backplate 2.The mantle 7 protection fluorescence coatings 4 gas cut evil of not making moist.Insulating barrier 6 all is to produce with traditional method with mantle 7.Because organic fluorescent pigment 5b and transparent resin 5a fusion, thereby transparent resin 5a keeps apart life-span or the durability that has prolonged organic fluorescent pigment 5b with particle and the outside air of organic fluorescent pigment 5b.
Fig. 2 is the result of indication EL plate 1 in daylight exposure test curve.The daylight exposure test result that Fig. 2 also illustrates the prior art EL plate of Fig. 3 and 4 supplies contrast.Solid line F represents the daylight exposure test result of the EL plate invented.The daylight exposure test result of the prior art EL plate of dotted line S presentation graphs 4.The daylight exposure test result of the prior art EL plate of chain-dotted line M presentation graphs 3.The X value of mensuration chromaticity coordinate Yxy of the light of each emission from the prior art EL plate of the EL plate invented and Fig. 3 and 4.Further determine in them the radiative decay of each.Y-axis is represented the X value of chromaticity coordinate Yxy.X-axis represents to test fate.Shown in line M, approximately began the back 30 days from test, the X value of the chromaticity coordinate Yxy of the prior art EL plate of Fig. 3 drops to below the floors (=0.28) of whiteness.Shown in line S, began the back more than 200 day in test, the X value of the chromaticity coordinate Yxy of the prior art EL plate of Fig. 4 drops to below the floors.Shown in line F, even test began after 500 days, the light that the X value of the chromaticity coordinate Yxy of the EL plate of being invented still keeps being sent can be characterized as white light intensity.
In the above-described embodiments, the organic fluorescent pigment 5b of chromatic light converter filter 5 converts the fluorescence of fluorophor 4a to white light.Yet the present invention also can be applied to convert fluorescence to white light other color visible in addition.
The present invention is not limited to the foregoing description.Should be appreciated that a person skilled in the art person under the condition that does not break away from the defined invention scope of appending claims, can easily change and modification the present invention.
Claims (6)
1, a kind of electroluminescent device with a light-emitting area comprises:
One deck can produce fluorescence and it is radiated at fluorophor on this light-emitting area when being subjected to a voltage drive; And
A chromatic light converter filter, convert this fluorescence to a kind of light or a kind of color different with the color of fluorescence, described chromatic light converter filter is arranged on the light-emitting area side of this electroluminescent device, and described chromatic light converter filter comprises the thin film of being made by a kind of transparent resin and a kind of organic fluorescent pigment of mixing with this transparent resin.
2, the electroluminescent device described in claim 1, wherein said chromatic light converter filter converts fluorescence to white light.
3, the electroluminescent device described in claim 1, wherein said film are from the fusion and the mixture that obtains is changed the step that forms described film produce mutually of this organic fluorescent pigment powder and transparent resin powder.
4, a kind of electroluminescent cell comprises:
A plate shape cover has a transparent planar section, and its outer surface constitutes a light-emitting area of this electroluminescent cell;
One deck is enclosed in the fluorophor in the described cover, and described luminescent coating can produce fluorescence and it is radiated on the light-emitting area when being subjected to the excitation of a voltage; And
A chromatic light converter filter, fluorescence is converted to a kind of light or a kind of color of the color that is different from fluorescence, described chromatic light converter filter is attached on this light-emitting area, and described chromatic light converter filter comprises the thin film of being made by a kind of transparent resin and a kind of organic fluorescent pigment that mixes with transparent resin.
5, the electroluminescent cell described in claim 4, wherein said chromatic light converter filter converts fluorescence to white light.
6, the electroluminescent cell described in claim 4, wherein said film are with organic fluorescent pigment powder and the fusion of transparent resin powder and the mixture that obtains is changed the step that forms described film produce.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP058415U JPH0623195U (en) | 1992-07-29 | 1992-07-29 | EL light emitting element |
| JP058415/92 | 1992-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1084690A true CN1084690A (en) | 1994-03-30 |
Family
ID=13083752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93109130A Pending CN1084690A (en) | 1992-07-29 | 1993-07-29 | Electroluminescent device |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0581232A1 (en) |
| JP (1) | JPH0623195U (en) |
| KR (1) | KR100228515B1 (en) |
| CN (1) | CN1084690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100474654C (en) * | 2002-02-12 | 2009-04-01 | 出光兴产株式会社 | Organic EL display device and method for manufacturing the same |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0691798A3 (en) * | 1994-07-05 | 1996-07-17 | Ford Motor Co | Fluorescent electroluminescent lamp |
| KR100537349B1 (en) * | 1996-06-26 | 2006-02-28 | 오스람 게젤샤프트 미트 베쉬랭크터 하프퉁 | Light-emitting semiconductor component with luminescence conversion element |
| DE19638667C2 (en) | 1996-09-20 | 2001-05-17 | Osram Opto Semiconductors Gmbh | Mixed-color light-emitting semiconductor component with luminescence conversion element |
| US5813752A (en) * | 1997-05-27 | 1998-09-29 | Philips Electronics North America Corporation | UV/blue LED-phosphor device with short wave pass, long wave pass band pass and peroit filters |
| US5813753A (en) * | 1997-05-27 | 1998-09-29 | Philips Electronics North America Corporation | UV/blue led-phosphor device with efficient conversion of UV/blues light to visible light |
| JP2000036201A (en) * | 1998-07-06 | 2000-02-02 | Fukukoku Ko | Light emission method and light emission device generating different visible electromagnetic wave length by exciting electron in covering layer molecules |
| JP4378242B2 (en) | 2003-09-25 | 2009-12-02 | 株式会社小糸製作所 | Vehicle lighting |
| DE102004031071B4 (en) | 2004-06-22 | 2008-04-30 | Samsung SDI Co., Ltd., Suwon | Method for treating an organic light-emitting diode (OLED) for extending the service life |
| KR102204953B1 (en) | 2014-06-25 | 2021-01-19 | 삼성디스플레이 주식회사 | Fluorescent sheet and light unit and liquid crystal display including the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4857416A (en) * | 1987-12-31 | 1989-08-15 | Loctite Luminescent Systems, Inc. | Infra-red emitting electroluminescent lamp structures |
| JPH0314540A (en) * | 1988-06-20 | 1991-01-23 | Mitsubishi Kasei Corp | El element |
| US5126214A (en) * | 1989-03-15 | 1992-06-30 | Idemitsu Kosan Co., Ltd. | Electroluminescent element |
| CA2079261C (en) * | 1991-11-25 | 1999-04-13 | Delmar R. Riffe | Co-rotational scroll compressor supercharger device |
-
1992
- 1992-07-29 JP JP058415U patent/JPH0623195U/en active Pending
-
1993
- 1993-07-26 EP EP93111947A patent/EP0581232A1/en not_active Withdrawn
- 1993-07-27 KR KR1019930014351A patent/KR100228515B1/en not_active IP Right Cessation
- 1993-07-29 CN CN93109130A patent/CN1084690A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100474654C (en) * | 2002-02-12 | 2009-04-01 | 出光兴产株式会社 | Organic EL display device and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0623195U (en) | 1994-03-25 |
| EP0581232A1 (en) | 1994-02-02 |
| KR940003423A (en) | 1994-02-21 |
| KR100228515B1 (en) | 1999-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |