 Hexaboride electron emissive material |
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| Electron tube with dispenser cathode |
| An object of the invention is to provide a vacuum tube with substantially increased electron ... |
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| Method of manufacturing a dispenser cathode and the use of the method |
| OF THE INVENTION If the indium- or gallium oxide is provided in a surface layer of the dispenser ... |
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| Tungsten-iridium impregnated cathode |
| I claim: 1. A thermionic cathode comprising: a porous matrix of an alloy of at least one noble ... |
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| Multifunctional ester-type additives for liquid hydrocarbyl or hydrocarbyloxy fuel |
| OF SPECIFIC EMBODIMENTS A polymeric ester was reacted with thiodipropionic acid in the presence of ... |
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| Ceramic material for use in casting reactive metals |
| The present invention relates to an article surface, for example, a core surface, which is exposed ... |
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| RE-Fe-B magnets and manufacturing method for the same |
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| Cast alloy used for production of rare earth magnet and method for producing cast alloy and magnet |
| We claim: 1. A cast alloy used for the production of a rare earth magnet, which: (a) contains from 2... |
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| Defuzzifier curcuit |
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Electroluminescent element
| Details |
Inventors: Tokailin, Hiroshi; Hosokawa, Chishio; Kusomoto, Tadashi;
Assignee: Idemitsu Kosan Co., Ltd. (Tokyo, JP)
Primary Examiner: Robinson; Ellis P.
Assistant Examiner: Nold; Charles R.
Attorney, Agent or Firm: Frishuaf, Holtz, Goodman & Woodward
An electroluminescent element comprising an electroluminescent (EL) material part which emits a near ultraviolet ray of light and a fluorescent material part which absorbs the ultraviolet light emitted from the electroluminescent material and emits a fluorescence in a visible light range from blue to red. The electroluminescent element provides for emission of lights with a wide range of wavelength and three elementary colors of blue, green and red can be expressed by appropriate combinations of the organic EL material and the fluorescent material. Consequently, the electroluminescent element provides for a full color display. |
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DETAILED DESCRIPTION What is claimed is: 1.
An electroluminescent element comprising an organic electroluminescent material part which emits a blue light and at least one fluorescent material part which absorbs said blue light and emits a fluorescence in a visible light range from bluish green to red light said fluorescent material part exists outside of the electroluminescent material part.
2.
The electroluminescent element as claimed in claim 1, wherein the fluorescent material part comprises a plurality of fluorescent materials.
3.
The electroluminescent element as claimed in claim 1 which is formed by laminating the organic electroluminescent material part and the fluorescent material part.
4.
The electroluminescent element as claimed in claim 1 wherein the organic electroluminescent material part is placed horizontally in line with the fluorescent material part.
5.
The electroluminescent element as claimed in claim 1, wherein the organic electroluminescent material part comprises a compound which emits a blue light, sandwiched between two electrodes, at least one of which electrodes is transparent or semitransparent.
6.
The electroluminescent element as claimed in claim 5, wherein the organic electroluminescent material part comprises a laminate of a layer of the compound which emits a blue light and a hole injection layer, said laminate being sandwiched between two electrodes, at least one of which electrodes is transparent or semitransparent.
7.
The electroluminescent element as claimed in claim 1, wherein the fluorescent material part comprises a fluorescent material comprising a stilbene-based dye, a coumarin-based dye, a cyanine-based dye, a pyridine-based dye, a xanthene-based dye or an oxadine-based dye.
8.
The electroluminescent element as claimed in claim 1, wherein the organic electroluminescent material is selected from the group consisting of ##STR17## 9.
The electroluminescent element as claimed in claim 1, wherein the fluorescent material part comprises at least one dye selected from the group consisting of 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyrylene)-4-H-pyran, 1-ethyl-2-(4-(p -dimethylaminophenyl)-1,3-butadienyl)-pyridium-perchorat, rhodamine B, rhodamine G and 2,3,5,6-H,4H-tetrahydro-8-trichloromethylquinolizino-(9,9a,1-gh)-coumarin
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Manufacturing Materials 
