MXPA98009461A - Elemento the organic, multicolor, method to manufacture it and element of presentation that uses the mi - Google Patents

Abstract

An element The multicolored organic that has a light-emitting layer that contains at least two organic dyes that can act as a light-emitting center (luminescent center), where at least one of the organic dyes is modified to change the colors of the light emitted from the element, and a method of manufacturing the element, and a screen using the element

Description

ELEMENT THE ORGANIC, MULTICOLOR, METHOD TO MANUFACTURE IT AND ELEMENT OF PRESENTATION THAT USES THE SAME FIELD OF THE INVENTION The present invention relates to an organic EL element that is used as a flat light source or display element, a method for manufacturing the same and a display element that uses it.

Prior Art Organic EL elements having a luminescent (light emitting) layer composed of an organic film, which can provide large area, low voltage display elements, are currently attracting a lot of attention. Since a structure of the element, having organic laminate layers of different carrying capacities of the carrier, can be effectively used to improve the efficiency of this element, an element has been proposed in which the transfer layer of the positive charge is free and the light electron transport layers contain low molecular weight aromatic amines and an aluminum chelate complex, respectively [C. W. Tang, Appl, Phys. Lett., 51, p. 913 (1987)]. With an applied voltage of 10 V or less, this element can provide high brightness of 1,000 cd / m2 which is sufficient for practical use. At present, arbitrary organic dyes are used as a luminescence center (light emitting center) to obtain arbitrary luminescent colors in the range from blue to red in the visible region. In addition, a multicolored RGB (RGB) display (a display element) can be obtained by tightly arranging the elements of the image that have luminescent colors of red (R), green (G) and blue (B), which are the primary colors, in parallel on the same substrate. However, to use a vacuum evaporation method to produce a multicolor screen, particularly a multicolor RGB screen with different luminescent colors as described above, the elements of the image with different luminescent colors can subsequently be produced on the same substrate that uses a shadow mask In this way, in comparison with the luminescent, monochromatic image elements, the elements of the previous image require a large amount of time and labor for production due to their small size, making them unsuitable for use in the manufacture of screens high definition. To solve these problems, Kido et al have proposed a section of emitter element that fits for white [sic] that is prepared in a contact print, but that can provide multiple colors by combining the element with a color filter, obviating an arrangement of EL elements on very small intervals or a preparation of elements having different luminescent colors [J. Kido, K, Nagai, Appl. Phys., Vol. 63, pp. 1026 to 1029 (1994) This method places a color filter between a transparent substrate and a transparent electrode of material such as indium tin oxide (OIE) to modulate emissions of an organic luminescent layer sandwiched between the OIE and an electrode A group at Idemitsu Kosan Co. has also proposed a combination of a blue emitter element and a color converter layer, to convert blue to green or red to arrange RGB image elements (Nikkei Electronics, January, pages 102, 1996) This method inserts a fluorescent color converting layer between the OIE and the transparent substrate to convert the blue light generated in the luminescent layer into green and red light, despite its simplicity, the arrangements based on the color or color conversion methods in blue are inefficient due to the losses in light absorption resulting from the color filter or conversion losses resulting from the color converter layer.

OBJECTIVE OF THE INVENTION This invention provides a solution to these problems, with the aim of creating an organic EL element that can provide superior luminous efficiency and is capable of easily providing multiple colors. These objectives also include a method of manufacturing these elements and creating a screen that incorporates these elements.

DESCRIPTION OF THE INVENTION To achieve the objectives, an organic EL element, according to this invention, uses two or more types of organic dyes that can act as light emitting centers. In the attempt to manufacture this element we have discovered that a layer of organic light emitting dye can be partially irradiated with electromagnetic radiation (light) to modify one or more types of dyes through photo-oxidation or photolysis to prevent dyes function completely as light emitting centers, or to change the colors of emitted light, thus allowing the production of different colors in irradiated and non-irradiated portions. The electromagnetic radiation that is used in this invention has a vacuum frequency of about 10"17 to 10 ° including gamma rays, X-rays, ultraviolet radiation, visible radiation and infrared radiation and is in particular, preferably ultraviolet radiation or radiation A first aspect of this invention includes a multicolored organic EL element, characterized in that the element includes a light emitting layer (a luminescent layer) containing at least two or more kinds of organic dyes that act as light emitting centers (centers luminescent) in which at least one of the classes of the organic elements is modified to change the colors of the light emitted by the element.The light emitting layer may consist of one or more capable.A second aspect of this invention includes a method for manufacturing a multicolored organic EL element, which includes the formation of a light emitting layer that contains nga at least two kinds of organic dyes that act as light emitting centers, and the partial irradiation of the light emitting layer with electromagnetic radiation to modify at least these kinds of organic dyes. A third aspect of this invention includes a method for manufacturing a multicolored organic EL element having one or more light emitting layers containing organic elements that act as light emitting centers, characterized in that any light emitting layer is completely irradiated or partially with electromagnetic radiation to modify at least one of these classes of organic dyes present within the irradiated area A fourth aspect of this invention includes a multicolored organic EL element, characterized in that an organic luminescent element, having a light emitting layer composed of At least one organic composite layer, the light emitting layer contains three or more kinds of organic dyes capable of acting as light emitting centers and emitting blue, green and red light, and in at least one of these kinds of organic dyes is modified to change the color of the light emitted from the correspo image element ndiente.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram showing a process in (1) to (6) for manufacturing a multicolored organic EL element according to modality 1. Figure 2 shows the emission spectrum of the elements obtained from units 1 (1) and (2). Figure 3 is a graph showing a luminance-voltage characteristic obtained from mode 1 (1). Figure 4 is a graph showing a luminance-tension characteristic obtained from mode 1 (2).

Figure 5 is a sectional view of an organic EL element according to mode 2.

Figure 6 is a sectional view of an organic EL element according to mode 3.

Figure 7 is a sectional view of an organic EL element according to mode 4.

Figure 8 is a sectional view illustrating a process of manufacturing an organic EL element according to mode 4 for each of steps A to F.

Figure 9 is a simplified view of an organic EL element according to the embodiment 4, seen from a glass substrate.

Preferred embodiments for carrying out the invention Figure 7 is a schematic diagram showing a modality (mode 4) of an organic EL element according to this invention. A glass substrate (a transparent substrate) 21 is sequentially laminated with a transparent electrode constituting a positive electrode, for example an OIE electrode 22 / a light emitting layer 23 containing 3 or more kinds of light emitting dyes; and a back electrode 24 that constitutes a negative electrode.

This specific lamination sequence is only one of different possible configurations; other possible configurations include positive electrode / free positive charge transport layer / light emitting layer / negative electrode, positive electrode / light emitting layer / electron transport layer / negative electrode, positive electrode / free positive charge carrier layer / layer light transmitter / electron transporter / negative electrode, negative electrode / free positive charge injection layer / light emitting layer / negative electrode, positive electrode / free positive charge injection layer / positive charge transport layer free / light emitting layer / negative electrode, and positive electrode / free positive charge injection layer / free positive charge transport layer / light emitting layer / electron transport layer / negative electrode. Figure 8 shows the manufacturing process for a multicolored organic EL element. This invention irradiates with electromagnetic radiation one or more light emitting layers containing organic dyes capable of acting as light emitting centers, but any or all of the layers can be irradiated. In this case, (a) the intensity of irradiation for the entire surface can vary (for example, the layers are exposed through a filter that has locally variant transmittance as a negative film, or the layers are swept by varying the light intensity emitted from a fine light source); or (b) the layers are partially irradiated using masking. Partial exposure includes, for example, exposure to contact using photo-masking and projection exposure, (ie, partial exposure using light focused by a lens or light emitted from a fine light source or using this light with photo-masking) . In an organic EL element the free positive charge is injected into the organic layer from a positive electrode, namely a positive charge injection electrode, while the electrons are injected into the organic layer from a negative electrode, namely an electrode of injection of electrons. In the organic layer that constitutes a light emitting layer, both carriers are recombined to generate excited excitons or molecules. By dispersing a very small amount of organic dye in the light emitting layer as a dopant (host), with little excitation energy compared to a compound (host) used for the light emitting layer, the excitation energy transfer allows the emission of the host that is going to be modulated in one of the doping dye. If multiple types of dopant dyes are used, the density of each doping dye can be adjusted to control the colors of the light emitted from the element (J. Kido et al., Appl. Phys.Lett., 67, page 2281, 1995 ). This invention provides an element having two or more kinds of organic dyes that can function as multiple types of light emitting centers in which any organic dye is partially irradiated with electromagnetic radiation, such as ultraviolet or visible light, degrading only one dye specific to modulate the colors of the light emitted from the irradiated portion. In this way, it is possible to obtain a full color screen by providing all the elements of the image on the same substrate with red dyes, green and blue, and using electromagnetic radiation to form emitting elements of red, green and blue. According to this invention, a dispersing host compound of the doping dyes can be used for an organic EL element that emits two or several colors and offers an unlimited array of colors of the emitted light. The carrier capacity of the host compound carrier is not limited and can carry electrons and / or free positive charge. The general host compound can be composed of anthracene, naphthalene, phenanthrene, pyrene, tetracene, coronenne, triceno, fluorescein, perylene, phthaloperylene, fanfatloperylene, perinone, phthaloperinone, naphthaloperinone, diphenylbutadiene, tetra phenylbutadiene, coumarin, oxadiazole, aldanin, bisbenzoxazoline, bisestiryl. , pyrazine, cyclopentadiene, oxine, to inoquinoline, imine, diphenylethylene, vinyl anthracene, diaminocarbazole, pyran, thiopyran, polyethyne, merocyanine, oxidoid compounds chelated with imidazole, quinacridone, rubrene, or their derivatives. An optical bleaching agent composed of benzoxazole, benzothiazole or benzimidazole is described in Japanese Patent Application Laid-open No. 59-194393, among others. Agents may include benzoxazoles such as 2,5-bis (5,7-di-t-pentyl-2-benzoxazolyl) -1,3,4-thiazole, 4,4'-bis (5,7-t-pentyl-) 2-benzoxazolyl) stilbene, 4,4'-bis (5,7-di-t- (2-methyl-2-butyl) -2-benzoxazolyl) stilbene, 2,5-bis (5,7-di-t) -pentyl-2-benzoxazolyl) thiophene, 2,5-bis [5- (a, a-dimethyl-benzyl] -2-benzoxazolyl] thiophene, 2,5-bis [5,7-di- (2-methyl-2- butyl) -2-benzoxazolyl] -3,4-diphenylthiophene, 2,5-bis (5-methyl-2-benzoxazolyl) thiophene, 4, '-bis (2-benzoxazolyl) biphenyl, 5-methyl-2-. { 2- [4- (5-methyl-2-benzoxazolyl) phenyl] inyl] benzoxazole, 2- [2- (4-chlorophenyl) vinyl] naphtho (1,2-d) oxazole; benzothiazo like 2, 2'- (p-phenylene-divinylene) -bisbenzothiazole; benzimidazoles as 2-. { 2- [4- (2-benzoimidazolyl) phenylvinyl} benzimidazole and 2- [2- (4-carboxyphenyl) inyl] benzimidazole. A metallic-chelated oxanoid compound is disclosed in Japanese patent application No. 63 295695, among others. Representative examples include 8-hydroxyquinoline metal complexes such as tris (8-quinolinol) aluminum, bis (8-quinolinol) magnesium, bis [benzo (f) -8-quinolinol] zinc, bis (2-methyl-8-quinolinorate) oxide ) aluminum, tris (8-quinolinol) indium, tris (5-methyl-8-quinolinol) aluminum, 8-quinolinol lithium, tris (5-chloro-8-quinolinol) gallium, bis (5-chloro-8-quinolinol) calcium, and poly [zinc (II) -bis- (8-hydroxy-5-quinolinonyl) methane]; and dilithioepinedolidione. The diethyrylbenzene compound is described in EP Patent No. 0373582, among others. Representative examples include 1,4-bis (2-methylstyryl) benzene, 1,4-bis (3-methylstyryl) benzene, 1,4-bis (4-methylstyryl) benzene, diethyrylbenzene, 1,4-bis (2- ethylstyryl) benzene, 1,4-bis (3-ethylstyryl) benzene, 1, -bis (2-methylstyryl) -2-methylbenzene, and 1,4-bis (2-methyl-styryl) -2-ethylbenzene.

The diestyrylpyrazine derivative disclosed in Japanese Patent Application Laid-Open No. 2-252793 can also be used as an organic colorant. Representative examples include 2,5-bis (4-methylstyryl) pyrazine, 2,5-bis (4-ethylstyryl) pyrazine, 2,5-bis [2- (l-naphthyl) vinyl] pyrazine, 2,5-bis (4-methoxystyryl) pyrazine, 2,5-bis [2- (4-biphenyl) vinyl] pyrazine, and 2,5-bis [2- (1-pyrenyl) vinyl] pyrazine. The dimethylidene derivative described in EP Patent No. 388768 or Japanese Patent Application Laid-open No. 3-231970 can be used as a material for the organic light emitting layer. Representative examples include 1, 4-fenilendimetilideno, 4,4'-fenildimetilideno, 2, 5-xilirendimetilideno [sic], 2,6-naftilendimetilideno, 1, 4-bifenilenfimetilideno, 1,4-p-terefenilendimetilideno [sic], 9 , 10-anthracendyldimethylidene, 4, 4 '- (2,2-di-t-butylphenylvinyl) biphenyl, 4, 4' - (2, 2-diphenylvinyl) biphenyl and its derivatives. These derivatives include the silanamine derivatives disclosed in Japanese Patent Applications from open to public No. 6-49079 and No. 6-293778, the multifunctional styryl compounds disclosed in Japanese Patent Application No. 6-279322 open to public and 6-279323, oxadiazole derivatives disclosed in Japanese Patent applications open to the public and No. 6-107648 N. 6-92947, anthracene compounds disclosed in Japanese Patent application Laid-open No. 6 -206865, oxinate derivatives are described in Japanese Patent application Laid-open No. 6-145146, the compounds described tetrafenilbutadieno Japanese Patent application Laid-open No. 4-96990, the organic trifunctional compounds described in Japanese Patent Application Laid-Open No. 3-296595, the coumarin derivatives disclosed in Japanese Patent Application Laid-Open No. 2-19169 4, perylene derivatives described in Japanese Patent Application Laid-Open No. 2-986885, naphthalene derivatives disclosed in Japanese Patent Application Laid-Open No. 2-255789, the derivatives are described ftaloperinona in Japanese Patent Application Laid-Open No. 2-289676, No. 2-88689 and the styrylamine derivatives are disclosed in Japanese Patent Application Laid-open No. 2-250292. If the element is used in a multi-color screen R (red), G (green) and B (blue), for example a full-color screen, it must be able to provide the primary colors of the light emitted by red, green and blue. In this way, an organic compound that is used as a host material must emit a blue light or a luminescent light that has a higher energy level than blue light (close to ultraviolet rays). The emission spectrum of this light has a maximum wavelength at 370 to 500 nm. The organic compound of this full-color screen should provide luminescent light in the range from near ultraviolet light to blue-green light and should be capable of transporting carriers. In this case, this organic compound can transport electrons and / or positive charges. An organic compound for a host that meets these requirements includes a metal complex having as a ligand at least one of the polycyclic compounds such as p-terphenyl and quaterphenyl and their derivatives; condensed polycyclic carbohydrates such as naphthalene, tetracene, pyrene, coronen, triceno, anthracene, diphenylanthracene, naphthacene and phenanthrene, and their derivatives; condensed heterocyclic compounds such as phenanthroline, vasophenanthroline, phenantholidine, acridine, quinoline, quinoxaline, and fenadine, and their derivatives; piperylene, ftaloperileno, naftaloperileno, perinone ftaloperinona, naftaloperinona, diphenylbutadiene, tetrafenilbutadieno, oxadiazole, triazole, ardanina, bisbenzoxazolina, bisestirilo, pyrazine, cyclopentadiene, vinylanthracene and carbazole, and their derivatives, and 8-quinolinorate and its derivatives. Oxadiazole is described in Japanese Patent Laid-open Applications No. 5-202011, No. 7-179394, 7-278124 and 7-228579, the triadine is disclosed in Japanese Patent Application No. 7 - 157473, the stilbene and diethyrylallylene derivatives are disclosed in Japanese Patent Application Laid-Open No. 6-203963, styrene derivatives are disclosed in Japanese Patent Laid-open Applications No. 6-132080 and 6-88072, and the diolefin derivative is disclosed in Japanese Patent Laid-open Applications No. 6-100867 and 6-207170. The diethyryl benzene compound is described, for example, in EP Patent No. 0373582. Representative examples include 1,4-bis (2-methylstyryl) benzene, 1,4-bis (3-methytyryl) benzene [sic], 1, 4-bis (4-methylstyryl) benzene, diethyrylbenzene, 1,4-bis (2-ethylstyryl) benzene, 1,4-bis (3-ethylstyryl) benzene, 1,4-bis (2-methylstyryl) -2-methylbenzene and 1,4-bis (2-methylsitryl) -2-ethylbenzene. The di-styrylpyrazine derivatives described in Japanese Patent Application Laid-open No. 2-252793 can be used as a host material for the light emitting layer. Representative examples include 2,5-bis (4-methylstyryl) pyrazine, 2,5-bis (4-ethylstyryl) pyrazine, 2,5-bis [2- (1-naphthyl) vinyl] pyrazine, 2,5-bis (4-methoxystyryl) pyrazine, 2,5-bis [2- (4-biphenyl) vinyl] pyrazine and 2,5-bis [2- (1-pyrenyl) inyl] pyrazine. The optical bleaching agent such as benzoxazole, benzothiazole, or benzimidazole can be used and are described in Japanese Patent Application Laid-open No. 59-194393. Representative examples include benzoxazole, such as 2,5-bis (5,7-di-t-pentyl-2-benzoxazolyl) -1,3,4-thiazole, 4,4'-bis (5,7-t-pentyl) -2-benzoxazolyl) stilbene, 4,4'-bis [5,7-di (2-methyl-2-butyl) -2-benzoxazolyl] stilbene, 2,5-bis (5,7-di-t-pentyl) -2-benzoxazolyl) thiophene, 2,5-bis [5- (a, a-dimethylbenzyl)] -2-benzoxazolyl)] thiophene, 2,5-bis [5,7- di- (2-methyl-2- butyl) -2-benzoxazolyl] -3,4-diphenylthiophene, 2,5-bis (5-methyl-2-benzoxazolyl) thiophene, 4,4'-bis (2-benzoxazolyl) biphenyl, 5-methyl-2-. { (2- [4- (5-methyl-2-benzoxazolyl) phenyl] vinyl.} Benzoxazole, 2- [2- (4-chlorophenyl) vinyl] naphtho (1,2-d) oxazole; benzothiazole, such as 2,2 '- (p-phenylenedivinylene) -bisbenzothiazole; and benzimidazole as 2-. { 2- [4- (2-benzimidazolyl) phenyl] vinyl} benzimidazole 2- [2- (4-carboxyphenyl) vinyl] benzimidazole. Other materials for an organic light emitting layer include dimethylidene derivatives which are described in EP Patent No. 388768 and Japanese Patent Application Laid-open No. 3-231970. Representative examples include 1, 4-fenilendimetilideno, 4,4'-fenilendimetilideno, 2, 5-xililendimetilideno, 2,6-naftilendimetilideno, 1, 4-bifenilendimetilideno, 1,4-p-terefenilendimetilideno, 9, 10-antracendiildimetilideno, 4 , 4 '- (2,2-di-t-butilfenilvinil) biphenyl, 4, 4'- (2,2-diphenylvinyl) biphenyl, and their derivatives, the silanamine derivatives disclosed in Japanese Patent Applications of open to public No. 6-49079 and No. 6-293778, the multifunctional styryl compounds are disclosed in Japanese Patent Application Laid-open No. 6-279322 and No. 6-279323, the oxadiazole derivatives are described in the Requests of the Japanese Patent Laid-open No. 6-107648 and No. 6-92947, anthracene compounds are disclosed in Japanese Patent Application Laid-open No. 6-206865, the oxinate derivatives are described in Japanese Patent Application open to the public No. 6145146, the tetraphenylbutadiene compounds are described in Japanese Patent Application Laid-Open No. 4-96990, trifunctional organic compounds are disclosed in Japanese Patent Application Laid-open No. 3-296595, coumarin derivatives are disclosed in Japanese Patent Application open to the public No. 2-191694, perylene derivatives are disclosed in Japanese Patent Application Laid-open No. 2-196885, naphthalene derivatives are disclosed in Japanese Patent Application Laid-Open No. 2- 255789, ftaloperinona derivatives are described in Applications Japanese Patent Publication No. 2-289676 open and the No. 2-88689, and estirilamina derivatives are described in Japanese Patent Application Laid-open No. 2 -250292. Organic compounds that can be used as host materials of the potential light emitting layer include the arylamine compounds, with the option not limited to the particular arylamine compounds, but preferably the arylamine compounds are disclosed in Japanese Patent Applications open to the public. No. 6-25659, No. 6-203963, No. 6-215874, No. 7-145116, No. 7-224012, No. 7-157473, No. 8-48656, No. 7-126226, No. 7-188130, No. 8-40995, No. 8-40996, No. 8-40997, No. 7-126225, No. 7-101911, and No. 7-97355. These compounds include, for example, N, N, N ', N' -tetraphenyl-4,4'-diaminophenyl, N, N'-diphenyl-N, N'-di (3-methylphenyl) -4,4'-diaminophenyl , 2, 2-bis (4-di-p-tolilaminofenil) propane, N, N, N ', N'-tetra-p-tolyl-4, 4'-diaminobiphenyl, bis (4-di-p-tolilaminofenil) phenylmethane, N, N '-diphenyl-N, N'-di (4-methoxyphenyl) -4,4'-diaminobiphenyl, N, N, N', N * tetraphenyl-4,4'-diaminophenylether, 4,4 ' -bis (diphenyl amino) cuadrifenilo, 4-N, N-diphenylamino (2-diphenylvinyl) benzene, 3-methoxy-4 '-N, N-diphenyl aminoestil benzene, N-fenilcarbazol, 1, 1-bis (4-di -p-triaminofenil) ciciohexano, 1, 1-bis (4-di-p-triaminofenil) -4-phenyl) ciciohexano, bis (4-dimethylamino-2-methylphenyl) phenylmethane, N, N, N-tri (p -tolyl) amine, 4- (di-p-tolylamino) -4 '- [4 (di-p-tolylamino) styryl] stilbene, N, N, N', N'-tetra-p-tolyl-4, 4 -dia-biphenyl, N, N, N'-tetraphenyl-4,4'-diamino-biphenyl N-phenylcarbazole, 4,4'-bis [N- (1-naphthyl) -N-phenyl-amino] -biphenyl , 4, 4"-bis [N- (1-naphthyl) -N-phenyl-amino] p-terphenyl, 4,4'-bis- [N- (2-naphthyl) -N-phenyl-amino] biphenyl, 4,4'-bis [N- (3-acenaphthenyl) -N-phenylamino] biphenyl, 1,5-bis [N- (1-naphthyl) -N-phenyl-amino]] naphthalene, 4,4'-bis [N- (9-anthryl) -N-phenylamino] biphenyl 4,4"-bis [N- (1- antril) N-phenylamino] p-terphenyl, 4,4'-bis [N-2-phenanthyl] -N-phenyl-amino] biphenyl [sic], 4,4'-bis [N- (8-fluoranetenyl) - N-Phenylamino] biphenyl, 4,4 'bis [2-pyrenyl] -N-phenylaminobiphenyl, 4,4'-bis [N- (2-perilynyl) -N-phenylamino] biphenyl, 4,4'-bis [N - (1-coronenyl) -N-phenyl-amino] biphenyl 2,6-bis (di-p-tolylamino) naphthalene, 2,6-bis [di- (l-naphthyl) amino] naphthalene, 2,6-bis [N- (1-naphthyl) -N- (2-naphthyl) amino] naphthalene, 4,4"-bis [N, N-di (2-naphthyl) amino] terphenyl, 4,4'-bis. { N-phenyl-N- [4- (1-naphthyl) phenyl] amino} biphenyl, 4, 4"-bis [N-phenyl-N- (2-pyrenyl) -amino] biphenyl, 2,6-bis [N, N-di (2-naphthyl) amino] fluorene, 4, 4" - bis- (N, N-di-p-tolylamine) terphenyl, and bis (Nl-naphthyl) (N-2-naphthyl) amine. Well-known organic compounds that are commonly used to produce organic EL elements can be used, as required. The above organic compounds can be dispersed in polymer, or they can be polymerized; or it is possible to use a polymer such as poly (N-vinylcarbazole) or polysilane. The choice of dopant is not limited, as long as the dopant is an organic fluorescent compound, including not only the former electron transport materials, the free positive charge carrier materials and light emitting materials, but also dyes such as coumarin derivatives , dicyanmethylene piran derivatives, dicyanmethylene thiopyran derivatives, fluorescein derivatives, perylene derivatives, or porphyrin derivatives which are well known as laser dyes. The organic compound that is used for the electron transport layer can also be for the electron transporting organic compounds found in the host materials of the light emitting layer described above, the metal chelate complex compounds are described in the open Japanese patent application. to the public No. 63-295695, 8-22557, 8-81472, 5-9470 and 5-17764, particularly the metal oxide-chelate compounds, preferably a metal complex having at least one ligand of: 8-quinolinorate as tris (8-quinolinorate) aluminum, bis (8-quinolinorate) agnesium, bis [benzo (f) -8-quinolinorate] zinc, bis (2-methyl-8-quinolinorate) aluminum, tris (8-quinolinorate) indium, tris (5-methyl-8-quinolinorate) aluminum, 8-quinolinoratolithium, tris (5-chloro-8-quinolinorate) gallium and bis (5-chloro-8-quinolinorate) calcium, and their derivatives. The carrier layer of the free positive charge may consist of one of the positively charged organic compounds such as arylamine, including the host materials of the above light emitting layer.

The carrier layer of the positive charge may also contain one of the above organic compounds dispersed in the polymer, or polymerized. Otherwise, this layer may contain p-conjugated polymer such as polyparaphenylenevinylene or its derivative or a polyalkylthiophene derivative, free-positively transported non-conjugated polymers represented by poly (N-vinylcarbazole) or conjugated sigma polymers such as polysilane. The material used for the injection layer of the positive charge is left unlimited, and may contain metal phthalocyanine such as copper phthalocyanine, non-metallic phthalocyanine, carbon membranes or conductive polymers such as polyaniline. In addition, Lewis acid is allowed to act on the above arylamine as an oxidizing agent to form radical cations, which can then be used as an injection layer of the positive charge. The method of irradiating the electromagnetic wave (or exposure method) according to this invention can be any of the methods of contact or exposure by projection, using a photo masking, or other well known exposure method, such as laser beam scanning. The electromagnetic radiation according to this invention may be visible light or light with suitable energy levels, such as ultraviolet radiation, X-rays or gamma rays. The different organic films that are used in this invention can be obtained using well-known film-forming methods, such as the vacuum evaporation method, the cathodic sublimation method and the application method. In the multicolored organic EL element according to the fourth aspect of this invention, the elements of the image that are modified to emit three luminescent colors including red, green and blue are arranged in a certain pattern, and the red, green and blue dots They can be arranged in a certain pattern or laminated. For example, an electrode, a red organic layer, an electrode, a green organic layer, an electrode, a blue organic layer and an electrode must be laminated in this order, thereby requiring different process steps for the respective layers. However, the layers can be formed by arranging the three light emitting sources for red, green and blue in a certain pattern and providing electrodes on them. This last method has the advantage of needing a small amount of process steps. In an element in which the pixels, each composed of R, G and B are arranged in parallel in the horizontal direction, one of the two electrodes acts as a single electrode, while the other acts as a scanning electrode. These electrodes are driven in a time-sharing manner to form images thereby providing a matrix of dots known as a passive RGB matrix or full-color screen. In addition, active elements such as a transmitter are added to each element of the image of a RGB multicolored element to form a memory function, thereby providing a matrix of RGB active matrix points or full-color screen. According to this invention, during the manufacturing process of an element, an organic layer having two or more kinds of dyes that can act as light emitting centers can be irradiated with light to degrade an arbitrary color in order to modulate the color corresponding luminescent emitted by the element. Thus, the partial irradiation allows a very simple arrangement of elements with different luminescent colors on the same substrate. This technique can be used for multicolored and other screen elements. By arranging the light-emitting image elements for the primary colors including red, green and blue on a substrate as a pixel, this arrangement can be used as a multi-color or full-color screen.

Modalities This invention is described below exemplified in various embodiments, but the invention is not limited to these specific embodiments. The polymer that is used in these embodiments of the invention was synthesized in the following manner. The reaction formula for this polymer is shown in formula 1. (1) One hundred twenty (120) ml of DMSO as solvent were added to 10.0 g of N, N '-diphenylbenzidine (27.9 mmol), 8.38 g of p-fluoronitrobenzene (59.4 mmol), and 4.5 g of cesium fluoride (29.7 mmol), and the mixture was stirred under a nitrogen atmosphere at 100 ° C for 24 hours. After the reaction, the mixture was emptied with stirring in 2500 ml of cold water to obtain impure crystals of N, N'-biphenyl-N- (4-nitrophenyl) -1,1-biphenyl-4,4'-diamine (NTPD). Afterwards, the mixture was dried for 12 hours under vacuum at 60 ° C. (2) fourteen point two (14.2) grams of NTPD (31.1 mmol), 12.7 g of iodobenzene (62.2 mmol), 21.5 g of potassium carbonate (156 mmol) and 9.88 g of activated copper (156 mmol) were mixed, which was then stirred under a nitrogen atmosphere at 220 ° C for 36 hours. After the reaction the mixture was dissolved in 1,2-dichloroethane, then filtered to remove the copper. An evaporator was used to remove 1,2-dichloroethane and the column chromatography method (development solvents: 1,2-dichloroethane: n-hexane = 1: 1, Rf = 0.52) was used to purify the mixture to obtain N, N '-diphenyl-N- (4-nitrophenyl) -N'- (phenyl) -1,1' -biphenyl-4,4'-diamine (NPTPD). (3) one hundred forty (140.0) ml of DMF were added to 3.50 g of NPTPD (9.19 mmol) and 1.83 g of palladium / 5% carbon to reduce the nitro group in a hydrogen atmosphere at room temperature and normal pressure. After the reaction the mixture was filtered to remove the palladium / carbon and the filtrate was drained in cold water (1800 ml) with stirring, thereby obtaining impure crystals of NN '-biphenyl-N- (4-aminophenyl) -N '- (phenyl) -1,1' -biphenyl-4,4'-diamine (APTPD). (4) two point sixty-three (2.63) grams of APTPD (5.04 mmol) and 0.51 g of triethylamine (5.04 mmol) were dissolved in 40 ml of benzene, and 0.79 g of methacrylic acid chloride (7.56 mmol) diluted in 5.0 ml of benzene was added dropwise to the mixture as the mixture was stirred at 10 ° C. The mixture was allowed to react for 36 hours. After the reaction, the mixture was filtered to remove the triethylamine hydrochloride. The mixture was then washed using IN HCl, INH HaOH and water, in this order and dried overnight over anhydrous magnesium sulfate. An evaporator was used to remove the solvent to obtain impure crystals of substituted methacrylamide at the N-position with a triphenyldiamine content (TPDMA). Subsequently, the column chromatography method (development solvent: 1,2-dichloroethane, Rf = 0.50) was used to purify the crystal (yield: 74.4%, 2.14 g), and a mixture of benzene and benzene solvents was used. cyclohexane for recrystallization in order to obtain white crystals in the form of needles. Yield: 38.5% (2.04g) Melting point: 175.5 to 176.2 ° C IR (KBr, cm "1: 3400, 1664, 1593 (CONH), 3000 (CH3), 1637 (CH2 = C): H NMR (270MHz , CDC13, TMS): d (ppm) = 2.0 (S, 3H, CH3), 5.4 (S, IH, CH2), 5.8 (S, IH, CH2), 6.9-7.5 (m, 27H, Ar) Elemental analysis (as C4oH33N3O?) Value analyzed: C 84.23%, H 6.08%, N 7.06% Calculated value: C 84.03%, H 5.82%, N 7.35% (5) one point thirteen (1.13) g of TPDMA (1.98 mmol) and 0.321 g of azoisobutyronitrile (AIBN) (0.198 mmol) as an initial agent were dissolved in 14.0 ml of benzene as a solvent in an ovoid flask with a stopcock After freezing and removing the air, the mixture was allowed to react at 60 ° C. C for 48 hours After the reaction, the mixture was poured into methanol (1/20) to precipitate a N-substituted methacrylamide polymer (PTPDMA) with a triphenyldiamine content.The precipitation was repeated five times to purify the mixture ( benzene / ethanol.) The structure was verified using the IR spectrum, XH NMR spectrum and elemental analysis. The polymerization reaction was confirmed by the loss of a peak based on the protons in a double bond of d (ppm) = 5.4 (S, ÍH, CH2) and 5.8 (S, ÍH, CH2) in XH NMR.

Yield: 94.4% (1.07 g) Weighted average molecular weight: 2.7 x 104 [DMF (LiBr), reduced polystyrene] XH NMR (270 MHz, CDC13, TMS): d (ppm) = 1.3 (S, 3H, CH3), 2.1 (S, 2H, CH2), 6.6-7.6 (m, 27H, Ar) Value of the elemental analysis (as C4oH33 3 ??) Value analyzed: C 83.16%, H 5.93%, N 7.33% Calculated value: C 84.03%, H 5.82%, N 7.35% Modality 1 (1) Without irradiation Figure 1 is a sectional view illustrating a manufacturing process according to an embodiment of this invention. Reference numeral 1 designates a glass substrate on which OIE (indium tin oxide) 2 of laminar strength 15 O / D is coated. A 1,2-dichloroethane solution of the PTPDMA polymer synthesized as described above, having positive transport capacity, emits a blue-purple light, with a content of 1% by weight, 3% by weight, 5% by weight or 7% by weight of rubrene based on the PTPDMA that emits a yellow light and has the following formula: was used to form a polymeric layer 3 (layer of PTPDMA with rubrene dispersed) of 600A thickness over the OIE by means of rotary coating. A layer of the tris (8-quinolinolate) aluminum complex (hereinafter referred to as Alq) 4 with green emission and expressed by the following formula: It was formed on the polymeric layer 3 as an electron transport layer 4 by depositing the material up to 400 Á in a vacuum of 10 5 Torr Finally, in the same vacuum, Mg and Ag (10: 1) were co-deposited up to 2000 Á as a back electrode 5, acting as a negative electrode The light emitting area was 0.5 cm x 0.5 cm In these organic EL elements, a direct current voltage was applied to produce emission from the light emitting layer , using OIE and Mg: Ag, respectively, as positive and negative electrodes.The luminescence was measured using the Topcon Luminescence Meter BM-8 meter.The yellow emission of this element was observed through a glass surface. obtained from the elements containing 1% by weight, 3% by weight, 5% by weight and 7% by weight of rubrene shown in Figures 2 (a), (b), (c) and (d), respectively, indicate that the rubrene dispersed in PTPDMA functions as an emitting center of the uz (a center of luminescence) in this structure of the element. Figure 3 shows the luminescence-tension characteristic obtained (in the figure, the triangular symbol indicates 1% of rubrene, the rectangular symbol indicates 3% of rubrene, the circular white symbol with a cross indicates 5% of rubrene and the square symbol with a cross indicates 7% of rubrene). As an initial characteristic, a yellow emission of up to 900 cd / m2 was obtained at 12 V. (2) Irradiation of the total surface Next, the polymeric layer 3 with a content of 3% of rubrene dispersed in polymer was formed on the OIE 2 on the glass substrate 1 up to 600 Á in a similar way, and the total surface was irradiated with 240 mJ / cm2 of i-line produced by a mercury lamp of high pressure in the air. As in the previous elements, the electron transport layer 4 was formed by depositing Alq on the polymer layer 3 up to 400A under a vacuum of 10"5Torr.In the same vacuum, Mg and Ag (10: 1) were co-deposited up to 2000 Á as a posterior electrode, which acted as a negative electrode 5. The area of light emission was 0.5 cm x 0.5 cm In this organic EL element was applied a direct current to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes, Figure 2 (e) indicates that the luminescent color was green, and was thus emitted from Alq and that the rubrene did not emit light. luminescence-tension characteristic obtained As an initial characteristic, a green emission of up to 9000 cd / nr was obtained at approximately 10 V. (3) Partial irradiation Next, the polymeric layer 3 with a content of 3% of rubrene dispersed in the polymer fu e formed in OIE 2 on the glass substrate 1 up to 600 Á in a similar manner [see Figure 1 (1) and (2)]. A photomask 9 was placed on the surface of the polymer and the elements were partially irradiated with 240 mJ / cpr of i-line produced by a high-pressure mercury lamp in the air [see Figure 1 (3)]. As in the previous element, the electron transport layer 4 was formed by depositing Alq on polymer layer 3 up to 400A in a 10"5Torr vacuum [see Figure 1 (4)]. Mg and Ag (10: 1) were co-deposited until 2000 Á in the same vacuum with the rear electrode 5, acting as a negative electrode [see Figure 1 (5)] .The area of light emission was 0.5 cm x 0.5 cm.On this element the organic EL applied a voltage of direct current to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes.The unexposed portion emitted a green light, while the exposed area emitted a yellow light. a multicolored display element having different luminescent colors on the same substrate (see the photographs included in the documents presented) Modality 2 (1) Without irradiation Figure 5 is a sectional view of mode 2. The reference number 1 designates a his glass treatment in which OIE (indium-tin oxide) 2 of laminar strength is coated 15 O / D. A free positive charge transport layer 6 was formed on the OIE by depositing N, N'-bis (3-methylphenyl) -1,1 '-biphenyl-4,4'-diamine (hereinafter referred to as TPD) having a positive charge transport capacity and has the following formula: up to 400 Á of thickness in a vacuum of 10"6Torr.After a layer of Alq-rubrene 7 was formed as a layer emitting electron transport light 7 depositing Alq and rubrene on it up to 600 Á in a vacuum of 10"5Torr, so the ratio of Alq to rubrene was 97% by weight and 3% by weight. Finally, Mg and Ag (10: 1) were co-deposited until 2000 A with the same vacuum, as a posterior electrode 5, acting as a negative electrode. The area of light emission was 0.5 cm x 0.5 cm. In this organic EL element a direct current voltage was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes. A yellow emission from this element was observed through a glass surface. An emission spectrum obtained from the element indicates that the rubrene present in the Alq layer functioned as a light emitting center in this structure of the element. (2) Irradiation of the total surface Next, a layer 6 of thickness 400 A was formed on the OIE 2 on the substrate glass 1 in the same manner as described above, and a layer of Alq-rubrene 7 was formed by -deposition of Alq and rubrene in this up to 600 Á in a vacuum of 10"5Torr, in the same proportion as described above, then the total surface was irradiated with 1200 mJ / cm2 of i-line produced by a mercury lamp high pressure in air.The Mg and Ag (10: 1) were co-deposited in the Alq-rubrene layer 7 up to 2000 Á with the same vacuum, as a posterior electrode 5, acting as a negative electrode. light emission was 0.5 cm x 0.5 cm.

In this organic EL element a direct current voltage was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes. It was found that the luminescent color was green, indicating Alq emission and no emission of rubrene, due to photooxidation. (3) Partial irradiation After, with TPD, a layer 6 of 400 A thickness was formed on the OIE 2 on the substrate glass 1 in the same way, and a layer 7 of Alq-rubrene was formed by co-depositing Alq and rubrene on this with up to 600 Á in a vacuum of 10"5Torr, in the same proportion given in the previous one A photomask 9 was placed on the surface of the polymer, and the element was partially irradiated with 1200 mJ / cm2 of i-line produced by A high-pressure mercury lamp in the air As the previous element, the Mg and Ag (10: 1) were co-deposited until 2000 Á to the vacuum as the posterior electrode 5, acting as a negative electrode, the light emitting area was 0.5 cm x 0.5 cm In this organic EL element, a direct current voltage was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes, the exposed portion emitted a light green indicating Alq, while the unexposed area emitted a yellow light, indicating rubrene. This element is a multicolored screen element that has different luminescent colors on the same substrate.

Mode 3 (1) Without irradiation Figure 6 is a sectional view of mode 3. Reference number 1 designates a glass substrate on which is coated OIE (indium-tin oxide) 2 laminar strength 15 O / D. A solution of 1,2-dichloroethane containing 30% by weight of 1, 3, 4-oxadiazole (PBD) electron transporter, 5% by weight of 1,1,4,4-tetraphenyl-1, 3- butadiene (hereinafter referred to as TPB) which is a blue light emitting dye, and 3% rubrene, in a poly (N-vinylcarbazole) (PVK) capable of carrying positive charges and having a peak emission in the region of Blue-purple wavelength (410 to 420 nm) was used to form a polymeric film 8 of 1000A on the ITP by means of rotary coating. Finally, a layer 5 of Mg and Ag (10: 1) was co-deposited at 2000 Á with the same vacuum as a negative electrode. The light emitting area was 0.5 cm x 0.5 cm. In this organic EL element, a direct current voltage was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes. A yellow emission of up to 2200 cd / m2 was obtained at 16 V as an initial characteristic. In addition, from the emission spectrum it was confirmed that the luminescence center was rubrene. (2) Irradiation of the total surface Next, layer 8 of PVK with a content of 30% by weight of PBD, 5% by weight of TPB, and 3% by weight of rubrene was formed on OIE 2 on the glass substrate 1 as described above, and the total surface area was irradiated with 120 mJ / cm2 of i-line produced by a high-pressure mercury lamp in air. The Mg and Ag (10: 1) were co-deposited on the polymeric layer 8 up to 2000 Á in an identical vacuum, as a back electrode 5, acting as a negative electrode. The light emitting area was 0.5 cm x 0.5 cm. In this organic EL element a direct current was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes. It was found that the luminescent color was blue and thus was produced by TPB and that the rubrene did not emit light due to photooxidation. (3) Partial irradiation Next, the layer of PVK 8 with a content of 30% by weight of PBD, 5% by weight of TPB, and 3% of rubrene was formed on OIE 2 on the substrate glass 1 in the same way previously described. A husk photo 9 was placed on the polymeric surface, and the element was partially irradiated with 120 mJ / cm2 of i-line produced by a high-pressure mercury lamp in the air. The Mg and Ag (10: 1) were co-deposited on the polymeric layer 8 up to 2000 Á with the same vacuum as the posterior electrode 5, acting as a negative electrode, the light emitting area was 0.5 cm x 0.5 cm. In this organic EL element a direct current voltage was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes. The exposed portion emitted blue light indicating TPB, while the unexposed area emitted yellow light, indicating rubrene. This element is a multicolored screen element that has different luminescent colors on the same substrate.

Modality 4 (1) (Control) Figure 7 is a sectional view of an embodiment of this invention. Reference numeral 21 designates a glass substrate on which OIE (indium tin oxide) 22 of laminar strength 15 O / D is covered. A solution of 1,2-dichloroethane with a content of poly (N-vinylcarbazole) (hereinafter referred to as PVK) capable of transporting positive charges with a blue-purple emission, and which is expressed by the following formula: % by weight of 1, 3, 4-oxadiazole derivative (PBD) capable of transporting electrons and which is expressed by the following formula 3% mol of 1, 1, 4, 4-tetraphenyl-1,3-butadiene (TPB), a blue dye that acts as a dopant dye, 1 mol% of coumarin 6 that has green emission and 1 mol% of Nile Red with red emission were used to form a polymeric film containing dye up to 1000 A by means of rotary coating. Then, the Mg and Ag (10: 1) were co-deposited up to 2000 Á with the same vacuum, as a posterior electrode 5, acting as a negative electrode. The light emitting area was 0.5 cm x 0.5 cm. In this organic electroluminescent element a direct current voltage was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes. A red emission from this element was observed through a glass surface. In this way, it was found that in this element structure, the energy transfer between the dye impurifiers caused by the energy of the dyes to transfer Nile Red with the lowest excitation energy unit, thereby allowing only the Red Nile function as a light emitting center. This result was the same as in the elements reported (J. Kido, H. Shionoya and K. Nagai, Appl. Phys. Lett 67, 2281 (1995)). (2) (Control) In a similar way, a layer of PVK with disperse dye was formed on the OIE on the glass substrate up to 1000 Á and a mercury lamp of high pressure was then used to irradiate the layer with light corresponding to an absorption band of the Nile Red, through a filter in the air, thus subjecting only the Nile Red to photo-oxidation to make it non-luminescent. Then, the Mg and Ag (10: 1) were co-deposited on the polymeric layer up to 2000 Á with the same vacuum as a subsequent electrode 5, acting as a negative electrode.

In this organic EL element a direct current voltage was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes. It was found that the luminescent color was green, emitted in this way from coumarin 6 and that Nile Red did not emit light. (3) (Control) In a similar manner, a layer of PVK with disperse dye was formed on the OIE on the glass substrate up to 1000 Á and a high pressure mercury lamp was then used to irradiate the layer with light corresponding to an absorption band of the Nile Red, through a filter in the air. Then, the filter was changed to irradiate the light layer corresponding to an absorption band of coumarin 6 thus subjecting both Nile Red and coumarin to photooxidation to render them non-luminescent. The Mg and Ag (10: 1) were then co-deposited on the polymeric layer up to 2000 Á with identical vacuum, as a posterior electrode 5, acting as a negative electrode. In this organic EL element a direct current voltage was applied to produce emission from the light emitting layer, using OIE and Mg: Ag, respectively, as positive and negative electrodes. It was found that the luminescent color was blue, and in this way it emitted from TPB, and that coumarin 6 and Nile Red did not emit light. (4) (The present invention) Next, 16 electrodes in OIE strips (shown in 22) of 3 mm width were arranged on the glass substrate 21 in parallel at equal intervals (see Figures 8 and 9) and a PVK layer with disperse dye 23 was formed up to 1000 Á in a similar manner (Figure 8B). Then, a photomask was placed on the surface of the polymer and a high pressure mercury lamp was used to irradiate two thirds of the entire PVK 23 layer area with light through a filter in such a way that the layer was illuminated in strips at equal intervals, thereby modifying only the Nile Red (Figure 8C). Subsequently, one half of the area of the PVK 23 layer in which the Nile Red had been modified using photo masking was irradiated with light in strips to modify coumarin (Figure 8D). 48 Mg electrodes: Ag in strips (shown in 24) of 1 mm amplitude were deposited in such a way as to pass through the OIE electrodes to form a screen element in the form of a matrix (Figures 8E and 9). A direct current voltage was applied to this element using OIE and Mg: Ag, respectively, as the positive and negative electrodes. Red, green and blue light was observed through a glass substrate. In addition, an image constituted by R, B and G could be shown using OIE as a scanning electrode and Mg: Ag as a signal electrode to cause each element of the image to emit light by means of time sharing transmission. With respect to the transmission method, an active element such as a transistor can be added to each image element of an RGB multicolored element to perform a memory function, thereby providing an active matrix dot matrix RGB screen, or a full color screen CLAIMS 1. A multicolored organic EL element having a light emitting layer containing at least two organic dyes that can act as a light emitting center, wherein at least one of the organic dyes is modified to change the colors of the light emitted from the element . 2. A method of manufacturing a multi-organic EL element comprising the formation of the light emitting layer containing at least two organic dyes that can act as a light emitting center, followed by the partial irradiation of the light emitting layer with electromagnetic waves to modify at least one of the organic dyes. 3. A method of manufacturing a multicolored organic EL element having one or more light emitting layers containing organic dyes that can act as a light emitting center, wherein the surface of an arbitrary light emitting layer is completely or partially irradiated with electromagnetic waves to modify at least one of the organic dyes present in the irradiated area. 4. A multicolored organic EL element characterized in that, in an organic electroluminescent element having a light emitting layer composed of at least one layer of an organic compound, the light emitting layer contains three or more organic dyes which can act as a transmitting center of light and that emits at least blue, green and red light, and that at least one of the organic dyes is modified to change the colors of the light emitted from the elements of the image. 5. The multicolored organic EL element is characterized in that in the organic electroluminescent element having a light emitting layer composed of at least one layer of an organic compound, the layer containing three or more organic dyes that can act as a light emitting center and that emit at least blue, green and red light, and being at least one of the organic dyes modified to change the colors of the light emitted from the elements of the image, the elements of the image are arranged to emit red, green light and blue for the modification. 6. A multicolored organic EL element in which the elements of the image are arranged horizontally and in parallel. 7. A passive matrix type RGB matrix screen in a multicolored organic EL element according to claim 5, wherein each pixel is constituted of red, green and blue image elements, wherein the pixels are arranged horizontally and in parallel, and wherein the light emission characteristics of each element of the image are controlled independently with linear sequential scanning. 8. An array of active matrix type RGB dot matrix in a multicolored organic EL element according to claim 5, wherein each pixel is constituted of red, green and blue image elements, wherein the pixels are arranged horizontally and in parallel, and wherein an active element is added to each image element to provide a memory function. 9. A full color dot array screen, wherein the screen according to claim 7 or 8 expresses all color.

SUMMARY OF THE INVENTION A multicolored organic EL element having a light emitting layer containing at least two organic dyes that can act as a light emitting center (luminescent center), wherein at least one of the organic dyes is modified to change the colors of the light emitted from the element, and a method of manufacturing the element, and a screen that uses the element.

Claims (7)

F i. 1 c i) C 5) C 3) (6)
1. C i / '/ F i g. 2
2. 2/7 F i g. 3
3. 3/7 F i g. 4
4. 4/7 F i g. 5 F i g. 6 F i g. 7
5. 5/7 F i g. 8
6. 6/7 F i g. 9
7. 7/7