Halogen-containing Patents (Class 428/691)
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Patent number: 6815095Abstract: A binderless stimulable phosphor screen is provided, comprising a vapor deposited phosphor layer on a support, wherein between the support and the phosphor layer a ceramic layer is present, wherein said ceramic layer preferably comprises a mixture of pigments so that the optical density of the phosphor screen is higher for the stimulating wavelength than for the stimulated emission wavelength of the vapor deposited phosphor.Type: GrantFiled: November 21, 2002Date of Patent: November 9, 2004Assignee: AGFA-GevaertInventors: Paul Leblans, Luc Struye, Ludo Joly
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Publication number: 20040028944Abstract: This invention relates to highly reliable organic electroluminescent (EL) materials and devices exhibiting high luminance, high light emitting efficiency, minimal deterioration in light emission, usability at high temperature and good storage stability.Type: ApplicationFiled: August 11, 2003Publication date: February 12, 2004Inventors: Tatsuo Mori, Teruyoshi Mizutani, Toru Takeda, Koichi Yamashita
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Patent number: 6638646Abstract: Poly(arylenevinylenes) comprising at least 20% of recurring units of the formula (I), where the symbols and indices have the following meanings: Aryl: is an aryl group having 4 to 14 carbon atoms; R′: is a substituent which is either in the labeled phenylene position 5 or 6 and is CN, F, Cl, N(R1R2) or a straight-chain, branched or cyclic alkyl, alkoxy or thioalkoxy group having 1 to 20 carbon atoms, in which, in addition, one or more H atoms may be replaced by F; R″: are identical or different and are CN, F, Cl or a straight-chain, branched or cyclic alkyl or alkoxy group having 1 to 20 carbon atoms, where one or more non-adjacent CH2 groups may be replaced by —O—, —S—, —CO—, —COO—, —O—CO—, —NR1—, —(NR2R3)+—A− or —CONR4—, and where one or more H atoms may be replaced by F, or an aryl group having 4 to 14 carbon atoms, which may be substituted by one or more non-aroType: GrantFiled: June 28, 2002Date of Patent: October 28, 2003Assignee: Semiconductors GmbHInventors: Hubert Spreitzer, Willi Kreuder, Heinrich Becker, Hermann Schenk, Nu Yu
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Patent number: 6626011Abstract: The invention provides a monomode optical fiber and a monomode preform (2) having a mother preform (22) housed in an outer sleeve tube (20). It is characterized in that it also includes an intermediate tube (21) between the mother preform (22) and the outer tube (20), the intermediate tube (21) possessing viscosity at fiber-drawing temperature which is less than the viscosity(ies) at fiber-drawing temperature of the mother preform (22) and of the outer tube (20). The invention also provides a method of manufacturing a monomode optical fiber. The fiber has a core that is better centered and less deformed than in the prior art. An application of the invention lies in making an optical amplifier.Type: GrantFiled: May 13, 1998Date of Patent: September 30, 2003Assignee: AlcatelInventors: Frédéric Chiquet, Marylise Le Thuaut, Jean-Jacques Girard, Pascal Baniel
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Patent number: 6597012Abstract: An organic electroluminescent device having a luminescent layer interposed between an anode and a cathode, on a substrate, wherein a layer containing an electron-accepting compound containing a boron atom represented by the following formula (I): wherein each of Ar1 to Ar3 which are independent of one another, is an aromatic hydrocarbocyclic group or aromatic heterocyclic group which may have a substituent, and a hole transport compound, is formed between the luminescent layer and the anode.Type: GrantFiled: May 1, 2002Date of Patent: July 22, 2003Assignees: Mitsubishi Chemical CorporationInventors: Junji Kido, Yoshiharu Sato
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Patent number: 6555253Abstract: In an organic electroluminescent device constructed by providing at least an emitting layer and a carrier transport layer using an organic material between a hole injection electrode and an electron injection electrode, at least one of the emitting layer and the carrier transport layer contains a chelate compound of a chromone derivative with zinc or aluminum, a chelate compound of a 3-hydroxyflavone derivative with a metal, a chelate compound composed of an 8-quinolinol derivative dimer and another ligant which are coordinated to a metal, or a chelate compound composed of two 8-quinolinol derivatives coordinated to a metal and one halogen bonded thereto.Type: GrantFiled: June 24, 1999Date of Patent: April 29, 2003Assignee: Sanyo Electric Co., Ltd.Inventors: Yuji Hamada, Masayuki Shono, Yasuhiko Matsushita
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Patent number: 6521359Abstract: Provided is a polymeric fluorescent substance which emits a fluorescence in a solid state, which comprises the following repeating unit in an amount of 20 mol % or more based on the total amount of all repeating units, in the formula, X1 represents a group selected from the group consisting of —CR3═CR4—, —C≡C—, —SiR5R6—, —NR7—, —CO—, —CO—O—, —O—CO—, —SO2—, a carbon-carbon single bond, —O— and —S—. The polymeric fluorescent substance has strong fluorescence, and can be suitably used as a polymer LED and a dye for laser.Type: GrantFiled: March 31, 2000Date of Patent: February 18, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Takanobu Noguchi, Shuji Doi, Makoto Kitano, Fumi Yamaguchi
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Patent number: 6495273Abstract: A light-emitting polymer and its preparation method, the polymer being excellent in electron injection and transport ability as well as hole injection and transport ability in an EL device, the EL device manufactured from the polymer being also emittable in the blue emission region, in which the EL device from an inorganic material is not mostly emittable. The light-emitting polymer of the invention is an alternated copolymer having repeated units (arylenevinylene units) excellent in hole injection and transport ability and repeated units (fluorinated tetraphenyl units) excellent in electron injection and transport ability with alternated order, as shown in formula (II). An EL device manufactured from the light-emitting polymer, a fluorinated tetraphenyl derivative of formula (I), which is used as a monomer to prepare the light-emitting polymer, and their preparation methods.Type: GrantFiled: September 15, 1999Date of Patent: December 17, 2002Assignee: Electronics and Telecommunications Research InstituteInventors: Do Hoon Hwang, Tae Hyoung Zyung, Lee Mi Do, Hye Yong Chu
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Patent number: 6440587Abstract: A phosphor powder for producing a high resolution phosphor screen and a phosphor screen are provided. The phosphor screen comprises a substrate, an infrared-absorbing layer, and a phosphor layer coated on the infrared-absorbing layer, wherein the phosphor layer comprises a phosphor powder in which a substantial amount of particles in the powder have a particle size as measured in the longest dimension of greater than 0 and less than about 5 microns. The phosphor screen may also comprise a black, infrared-absorbing substrate with the phosphor layer coated on the substrate. The phosphor powder is formed by preparing a phosphor composition, sintering the composition to form ingots, grinding the ingots to form a powder wherein a substantial amount of particles in the powder have a particle size of greater than 0 and less than about 5 microns, reactivating the powder in an inert atmosphere to a temperature of from about 500° C. to about 550° C.Type: GrantFiled: August 28, 2000Date of Patent: August 27, 2002Assignee: The Institute For Radiological Image Sciences, Inc.Inventors: Fauzia Jamil, Peter K. Soltani
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Publication number: 20020076550Abstract: A luminescent coating compound of organic binder and luminescent fibers containing at least one organic binder and fibers which of a fiber-forming material with at least one luminescent dye or pigment distributed therein. Also a process of producing coatings of such compounds and articles with such coatings.Type: ApplicationFiled: September 24, 2001Publication date: June 20, 2002Inventors: Michael Kohla, Christoph Frigge
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Publication number: 20020064680Abstract: Poly(arylenevinylenes) comprising at least 20% of recurring units of the formula (I), 1Type: ApplicationFiled: August 22, 2000Publication date: May 30, 2002Inventors: Hubert Spreitzer, Willi Kreuder, Heinrich Becker, Hermann Schenk, Nu Yu
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Patent number: 6387297Abstract: A rare earth fluoride phosphor favorably employable for the incorporation into a radiographic intensifying screen has the following formula (I) or (II): (Gd1−xLnx)F3·aMX (I) LnF3·aMX:yA (II) in which Ln is Y, La or Lu; M is Na, K, Cs or Rb; X is F, Cl, Br or I; A is Ce, Tb or Bi; and a, x and y numbers satisfying the conditions of 0<a≦0.03 and 0≦x≦0.1, 0<y≦0.1, respectively.Type: GrantFiled: June 4, 1999Date of Patent: May 14, 2002Assignee: Fuji Photo Film Co., Ltd.Inventor: Yuji Isoda
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Publication number: 20020041977Abstract: An europium activated cesium bromide phosphor having the formula of CsBr:xEu [0<x≦0.2], in which a relationship between an emission intensity (IE) of Eu2+ and a coloring intensity (IF) at F (Br−) center satisfies the condition of 0.2≦IExIF, and/or in which a ratio of Eu2+ to Eu3+ contained in the phosphor in terms of emission intensity satisfies the condition of 5×10−5≦Eu3+/Eu2+≦0.1 gives an increased stimulated emission amount and is favorably employed for producing a radiation image storage sheet.Type: ApplicationFiled: June 25, 2001Publication date: April 11, 2002Inventors: Yasuo Iwabuchi, Yuji Isoda
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Patent number: 6368731Abstract: Electroluminescent assembly comprising a substrate, an anode, an electroluminescent element and a cathode, where at least one of the two electrodes is transparent in the visible spectral region and the electroluminescent element contains one or more zones selected from the group consisting of hole injection zone, hole transport zone, electroluminescent zone, electron transport zone and electron injection zone in the order specified, where each of the zones present may also assume functions of the other zones mentioned, characterized in that the electroluminescent element contains a boron complex of an 8-aminoquinoline derivative.Type: GrantFiled: June 30, 1999Date of Patent: April 9, 2002Assignee: Bayer AktiengesellschaftInventors: Helmut-Werner Heuer, Rolf Wehrmann, Andreas Elschner
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Patent number: 6359211Abstract: This invention relates to dye sensitized polycrystalline photoelectrochemical solar cells for use in energy transduction from light to electricity. It concerns the utility of highly absorbing organic chromophores as sensitizers in such cells and the degree to which they may be utilized alone and in combination to produce an efficient photoelectrochemical cell, e.g., a regenerative solar cell.Type: GrantFiled: June 19, 2000Date of Patent: March 19, 2002Assignee: Chemmotif, Inc.Inventors: Mark T. Spitler, Anne Ehret, Louis S. Stuhl
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Publication number: 20020013451Abstract: A polymeric material comprising alternate substituted fluorene and phenylene units, as represented by the following formula 1Type: ApplicationFiled: April 24, 2001Publication date: January 31, 2002Inventors: Wei Huang, Wang Lin Yu, Jian Pei, Soo Jin Chua
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Patent number: 6323266Abstract: An extended life fluorescent polyvinyl chloride sheeting and a method for forming the sheeting are disclosed. The sheeting includes a polyvinyl chloride film having a fluorescent colorant incorporated therein. A protective polymer layer is attached to the polyvinyl chloride film. A light filtering agent is incorporated into the protective layer, wherein the filter agent blocks the 425 nm and lower wavelengths of the visible spectrum.Type: GrantFiled: January 8, 2001Date of Patent: November 27, 2001Assignee: Reflexite CorporationInventor: Edward D. Phillips
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Patent number: 6316130Abstract: Electroluminescent assembly comprising a substrate, an anode, an electroluminescent element and a cathode, where at least one of the two electrodes is transparent in the visible spectral region and the electroluminescent element contains one or more zones selected from the group consisting of hole injection zone, hole transport zone, electroluminescent zone, electron transport zone and electron injection zone in the order specified, where each of the zones present may also assume functions of the other zones mentioned, characterized in that the electroluminescent element contains an azomethine-metal complex.Type: GrantFiled: July 1, 1999Date of Patent: November 13, 2001Assignee: Bayer AktiengesellschaftInventors: Helmut-Werner Heuer, Rolf Wehrmann, Andreas Elschner
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Publication number: 20010024738Abstract: Multifunctional electroactive copolymers are provided. The copolymers may be A-B-A triblock copolymers, brush-type graft copolymers, or variations thereof. In a preferred embodiment, the copolymers are “dual use” in that they comprise both a light emitting segment and a charge transport segment. Methods of synthesizing the novel electroactive copolymers are provided as well, as are opto-electronic devices, particularly LEDs, fabricated with the novel copolymers.Type: ApplicationFiled: March 27, 2001Publication date: September 27, 2001Inventors: Craig Jon Hawker, Gerrit Klaerner, Jeong-Ik Lee, Victor Yee-Way Lee, Robert Dennis Miller, John Campbell Scott
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Patent number: 6294273Abstract: Electroluminescent assembly comprising a substrate, an anode, an electroluminescent element and a cathode, where at least one of the two electrodes is transparent in the visible spectral region and the electroluminescent element contains one or more zones selected from the group consisting of hole injection zone, hole transport zone, electroluminescent zone, electron transport zone and electron injection zone in the stated order, where each of the zones present can also assume functions of the other zones mentioned, characterized in that the electroluminescent element contains an N-alkyl-2,2′-imino-bis-(8-hydroxyquinoline)-metal complex.Type: GrantFiled: June 8, 1999Date of Patent: September 25, 2001Assignee: Bayer AktiengesellschaftInventors: Helmut-Werner Heuer, Rolf Wehrmann, Andreas Elschner
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Publication number: 20010021455Abstract: A linear aperture deposition apparatus and process are provided for coating substrates with sublimed or evaporated coating materials. The apparatus and process are particularly suited for producing flexible films having an optical interference coating with a very high surface thickness uniformity and which is substantially free of defects from particulate ejection of a source material. The apparatus includes a source box containing a source material, a heating element to sublime or evaporate the source material, and a chimney to direct the source material vapor from the source box to a substrate. A flow restricting baffle having a plurality of holes is positioned between the source material and the substrate to confine and direct the vapor flow, and an optional floating baffle is positioned on the surface of the source material to further restrict the vapor flow, thereby substantially eliminating source material spatter.Type: ApplicationFiled: January 10, 2001Publication date: September 13, 2001Inventors: Matthew R. Witzman, Richard A. Bradley, Christopher W. Lantman, Eric R. Cox
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Patent number: 6287713Abstract: Electroluminescent assembly comprising a substrate, an anode, an electroluminescent element and a cathode, where at least one of the two electrodes is transparent in the visible spectral region and the electroluminescent element contains one or more zones selected from the group consisting of hole injection zone, hole transport zone, electroluminescent zone, electron transport zone and electron injection zone in the order specified, where each of the zones present may also assume functions of the other zones mentioned, characterized in that the electroluminescent element contains a boron complex of an 8-hydroxyquinoline derivative.Type: GrantFiled: June 29, 1999Date of Patent: September 11, 2001Assignee: Bayer AktiengesellschaftInventors: Helmut Werner Heuer, Rolf Wehrmann, Andreas Elschner
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Patent number: 6238774Abstract: A high temperature oxide superconductor is efficiently protected from the affects of water and acids by forming a passivation layer of a fluoride. The fluoride layer comprises a fluoride composed of one or more elements composing the oxide superconductor and/or one or more elements that can compose an oxide superconductor by replacing at least in part one or more elements composing the oxide superconductor.Type: GrantFiled: June 14, 1994Date of Patent: May 29, 2001Assignee: Fujitsu LimitedInventors: Kyung-ho Park, Nagisa Ohsako
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Patent number: 6203725Abstract: According to the present invention, when the traveling of an automatic guided vehicle is optically controlled, a traveling controlling means containing a luminescent compound satisfying the following formula (1) is placed in a predetermined range for traveling of the automatic guided vehicle: A−B≧150 nm (1) wherein, A represents the minimum wavelength end (nm) of the luminescent compound, and B represents the maximum wavelength end (nm) of an irradiation light used for the traveling controlling.Type: GrantFiled: July 18, 1997Date of Patent: March 20, 2001Assignee: Mitsui Chemicals, Inc.Inventors: Akira Ogiso, Yasuhisa Fujii, Kyozo Kurita, Masataka Iwata, Shizuo Kuroda, Hisato Itoh
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Patent number: 6168876Abstract: An improved, “fail-safe” safety device comprising, in combination, a backlighted fluorescent film and a retroreflective sheet.Type: GrantFiled: March 15, 1994Date of Patent: January 2, 2001Inventors: Elizabeth M. Thorp, Stephen N. Thorp
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Patent number: 6132640Abstract: Quinoline compound, zinc halogenide complex and zinc complex suited for use in an electro-luminescence (EL) element, a fluorescent material and an ultraviolet absorption material, and a preparation process for these compounds are described. These compounds and a tautomer of the same have a strong luminescent intensity and are used for an EL material, the compound of zinc halogenide complex and zinc complex and a tautomer of the same has absorption at a wave length of 400 nm or less and is used for an ultraviolet absorption material, and further the quinoline compound and a tautomer has a strong luminescent intensity and is used for a fluorescent material. The zinc halogenide complex and zinc complex can be prepared by related preparation processes directly from a quinoline derivative and a phthalimide derivative, or by way of the quinoline compound which is obtained from these derivatives.Type: GrantFiled: June 18, 1997Date of Patent: October 17, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Tadashi Okuma, Hideki Ikuta, Tatsuya Nagayoshi, Akira Ogiso, Hisato Ito
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Patent number: 6111063Abstract: A photoluminescence polymer having a repeating unit in which an aromatic amine and a double bond are conjugated. The photoluminescence polymer can be used as an emission material for the display device, which is particularly useful in a display device requiring an film forming property. Also, a device having the photoluminescence polymer has a low driving voltage and a short response time, and can display various colors over a range from blue to green, especially, blue.Type: GrantFiled: March 9, 1998Date of Patent: August 29, 2000Assignee: Samsung Display Devices Co., Ltd.Inventors: Jong-wook Park, Seong-woo Cho
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Patent number: 6107452Abstract: Preparation of thermally and/or photochemically crosslinkable oligomeric precursors and the use of those oligomeric precursors in preparing crosslinked electroactive polymers are described. The oligomers, polymers, and synthetic methods find utility in the manufacture of opto-electronic devices such as light emitting diodes, photoconductors, photovoltaic cells, and the like, wherein synthesis of electroactive films and polymeric multilayers is required.Type: GrantFiled: October 9, 1998Date of Patent: August 22, 2000Assignees: International Business Machines Corporation, Board of Trustees of the Leland Stanford Junior UniversityInventors: Robert Dennis Miller, Gerrit Klaerner, John Campbell Scott
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Patent number: 6083634Abstract: A new class of organometallic complexes for use in electroluminescent (EL) devices and a method of preparation are disclosed. The organometallic complexes are prepared by mixing organic ligands with metal salts and a layer is formed in an EL device by vacuum evaporation. The organometallic material in the EL device forms a light emission layer.Type: GrantFiled: August 11, 1997Date of Patent: July 4, 2000Assignee: Motorola, Inc.Inventor: Song Q. Shi
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Patent number: 6068940Abstract: Described is an organic electroluminescent device material which comprises a coumarin derivative represented by the following formula (1): ##STR1## wherein R.sub.1 to R.sub.4 each independently represents a hydrogen atom, a halogen atom or a substituted or unsubstituted alkyl, alkoxy, thioalkyl, aryloxy, arylthio, carbocyclic aromatic or heterocyclic aromatic group; and an organic electroluminescent device fabricated using the material. According to the present invention, a red-emitting material with high brightness and high luminous efficiency indispensable for full color display can be provided.Type: GrantFiled: May 22, 1998Date of Patent: May 30, 2000Assignee: NEC CorporationInventor: Taizou Tanaka
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Patent number: 6057048Abstract: An electroluminescent device comprised of an anode, a hole transporting layer, a light emitting layer, and a cathode, wherein said light emitting layer contains a component of the formula ##STR1## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, and Ar.sup.4 are each independently aryl or optionally aliphatic; R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen, aliphatic, halogen, and cyano; L is a suitable linking group; and n is a number of from 0 to about 3.Type: GrantFiled: October 1, 1998Date of Patent: May 2, 2000Assignee: Xerox CorporationInventors: Nan-Xing Hu, Mohammad Esteghamatian, Yu Qi, Zoran D. Popovic, Beng S. Ong, Ah-Mee Hor
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Patent number: 6048631Abstract: An object of this invention is to provide an organic EL device material stable against heat, having a high purity in bluish light emission and a high efficiency. The organic EL device comprises a glass substrate, a transparent anode, a TPD which is an electron hole implanted transporting layer, an organic luminous layer, Alq.sub.3 which is an electron implanted transporting layer and a cathode. The organic luminous layer is an aluminum complex which is .mu.-oxozi [bis(2-(2-benzo oxazolyl)-phenolate) aluminum (III)]. Plus and minus DC voltages are applied to the anode and cathode respectively. The organic luminous layer indicates bluish light emission of 1314 cd/m.sup.2 at 16V. A peak wave length of the luminous spectrum is 420 nm and chromaticity coordinates are x=0.185 and y=0.178 and a high purity as bluish color is assured. The organic EL device material is stable against heat and difficult to deteriorate.Type: GrantFiled: July 11, 1997Date of Patent: April 11, 2000Assignee: Futaba Denshi Kogyo K.K.Inventors: Hisamitsu Takahashi, Yoshihisa Tsuruoka, Satoshi Tanaka, Toshio Miyauchi
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Patent number: 6045930Abstract: Disclosed herein are organic light emitting devices in which emitting layers (EL) comprise a suitable receiving compound according to Formulas I and II: ##STR1## wherein M is an ion of a divalent or trivalent metal atom, wherein n=3 when M is trivalent, and n=2 when M is divalent, wherein the metal atom is selected from the group consisting of aluminum, gallium, indium, and zinc, and wherein X, Y, and Z are each individually and independently C or N, such that at least two of X, Y and Z are N; and ##STR2## wherein R is alkyl, phenyl, substituted alkyl, substituted phenyl, trimethylsilyl, or substituted trimethylsilyl.Also disclosed are OLED's utilizing device elements comprising the above compounds and display devices based on those OLED's.Type: GrantFiled: May 2, 1997Date of Patent: April 4, 2000Assignees: The Trustees of Princeton University, The University of Southern CaliforniaInventors: Mark E. Thompson, Jon A. Cronin, Stephen R. Forrest, Paul Burrows
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Patent number: 6030715Abstract: Organic light emitting devices are disclosed which are comprised of a heterostructure for producing electoluminescence wherein the heterostructure is comprised of an emissive layer containing a dopant compound selected from the class of azlactone-related compounds having the chemical structure as represented by formula I: ##STR1## where R is hydrogen or a donor or acceptor group relative to hydrogen; R'=alkyl or substituted or unsubstituted aryl;R.sub.1 and R.sub.2 are hydrogen or are joined to form a fused aryl ring;X is O; NR.sub.5, where R.sub.5 is hydrogen or substituted or unsubstituted alkyl; alkyl or substituted or unsubstituted aryl;Z.sub.1 and Z.sub.2 are, independently of one another, a carbon or nitrogen atom; andY is M, a metal atom, whenever Z.sub.1 and Z.sub.2 are both nitrogen atoms;Y is O; NR.sub.6, where R.sub.6 is hydrogen or substituted or unsubstituted alkyl; or S; whenever either Z.sub.1 or Z.sub.2 is a carbon atom; orY is absent.Type: GrantFiled: October 9, 1997Date of Patent: February 29, 2000Assignees: The University of Southern California, The Trustees of Princeton UniversityInventors: Mark Thompson, Yujian You, Nicos A. Petasis, Paul E. Burrows, Stephen R. Forrest
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Patent number: 6017644Abstract: A light emitting device is composed of a pair of electrodes and an organic compound layer interposed between the electrodes. In the organic compound layer is used a organic compound shown by the following formula (1): ##STR1## wherein R.sup.1 is a hydrogen atom, an alkyl group or a halogen atom, R.sup.2 is X--Ar.sup.1 ; X is NH, O or S, Ar.sup.1 is a substituted or unsubstituted aromatic ring having a partial structure shown by the following formula (2): ##STR2## or a substituted or unsubstituted heterocyclic ring; each of R.sup.3 and R.sup.4 is a hydrogen atom, an alkyl group, a substituted or unsubstituted aromatic ring, or a substituted or unsubstituted heterocyclic ring; each of R.sup.5 and R.sup.6 is a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an alkoxy group, a substituted or unsubstituted aromatic ring, or a substituted or unsubstituted heterocyclic ring.Type: GrantFiled: September 11, 1998Date of Patent: January 25, 2000Assignee: Canon Kabushiki KaishaInventors: Yomishi Toshida, Akihiro Senoo, Kazunori Ueno, Seiji Mashimo
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Patent number: 6013383Abstract: An organic electroluminescent display device (10) includes a plurality of organic layers (16, 18, 20, 22 and 24) disposed between opposing electrodes (14 and 26). The hole transporting layer (22) comprises a hole transporting material characterized by the general formula: ##STR1## where n, m, and p each independently take the value of 0, 1 or 2; A1 and A2 each represents:(a) an alkyl group; or(b) an alkyl substituted with aryl, hydroxy, cyano, alkoxy, halo, or amino group(s); or(c) an aryl group; or(d) an aryl group substituted with alkyl, aryl, hydroxy, cyano, alkoxy, phenyl, halo, or amino group(s).Type: GrantFiled: February 18, 1997Date of Patent: January 11, 2000Assignee: Motorola, Inc.Inventors: Song Shi, Cynthia Gorsuch, Maridela C. Siethoff, H. C. Lee
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Patent number: 6010796Abstract: An organic electroluminescent device of a single heterostructure is fabricated by forming a transparent electrode (anode) of ITO, a hole transport layer, an electron transport layer and a metal electrode (cathode) in that order on a glass substrate. An exciton generation promoting layer is formed between the hole transport layer and the electron transport layer. The hole transport layer is a two-layer structure consisting of a hole transport light emitting layer or a hole injection layer, and a hole transport light emitting layer. Exciton generation in the hole transport light emitting layers 4a and 4b can be promoted. The hole injection layer enables efficient hole injection.Type: GrantFiled: July 7, 1997Date of Patent: January 4, 2000Assignee: Sony CorporationInventor: Yasunori Kijima
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Patent number: 6007928Abstract: An EL cell exhibiting high luminous efficiency and excellent durability is disclosed. The EL cell comprises a layer of a block copolymer comprising a block component (A) of the following formula (1) having a positive hole transfer capability and a block component (B) of the following formula (2) having an electron transfer capability at molar ratio of the block component (A) to the block (B) between 0.1:99.9 and 99.9:0.1.Type: GrantFiled: August 10, 1998Date of Patent: December 28, 1999Assignees: JSR Corporation, International Center for Materials Research, TECO Electric & Machinery Co., Ltd.Inventors: Mitsuhiko Sakakibara, Yasumasa Takeuchi, Ding-Kuo Ding
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Patent number: 6004685Abstract: An OLED having a cathode constructed from a first conducting layer. An electron transport layer constructed from a first electron transport material overlays the cathode. An electroluminescent layer constructed from the first electron transport material doped with dibenzotetraphenylperiflanthene overlays the electron transport layer. A hole transport layer constructed from a first hole transport material overlays the electroluminescent layer. The anode overlays the hole transport layer. In one embodiment of the invention, a second hole transport layer constructed from a second hole transport material is sandwiched between the anode and the first hole transport layer. In a third embodiment of the invention, a second electron transport layer constructed from a second electron transport material is sandwiched between the electroluminescent layer and the first hole transport layer.Type: GrantFiled: December 23, 1997Date of Patent: December 21, 1999Assignee: Hewlett-Packard Company & The Board of Regents of The University of Texas SystemInventors: Homer Antoniadis, Allen J. Bard
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Patent number: 5998046Abstract: An organic thin film electroluminescent device has at least an organic thin film provided between an anode and a cathode,wherein the organic thin film includes a compound which is represented by a general formula (I): ##STR1## where Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, Ar.sup.5, and Ar.sup.6 are selected from the group consisting of non-substituted phenyl groups and phenyl groups substituted with at least a substituent which is selected from the group consisting of alkyl groups having 1-4 carbon atoms, alkoxyl groups having 1-4 carbon atoms, amino groups, alkyl amino groups having 1-4 carbon atoms, dialkyl amino groups having 1-4 carbon atoms, alkyl thio groups having 1-4 carbon atoms, halogens, and halogeno alkyl groups having 1-4 carbon atoms, and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 are selected from the group consisting of hydrogen and methyl groups.Type: GrantFiled: November 12, 1997Date of Patent: December 7, 1999Assignee: NEC CorporationInventors: Hiroshi Tada, Hiroyuki Endoh, Akira Hirano, Koji Utsugi
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Patent number: 5998045Abstract: The invention relates to an organic electroluminescent device comprising a light-emitting composition disposed between a first and second electrode. The composition comprises poly(fluorene-co-anthracene).Type: GrantFiled: July 3, 1997Date of Patent: December 7, 1999Assignees: International Business Machines Corporation, The Board of Trustees of the Leland Stanford Junior UniversityInventors: Weidong Chen, Gerrit Klaerner, Robert Dennis Miller, John Campbell Scott
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Patent number: 5989738Abstract: An organic electroluminescent component with a layer arrangement includes a first electrode layer, an inorganic layer which conducts electrons, one or several optoelectronically active layers with at least one light-emitting layer which comprises an organic emitter, and a second electrode layer. The inorganic layer which conducts electrons is an N-type conducting oxide of a transition metal chosen from the group consisting of zirconium oxide, hafnium oxide, vanadium oxide, barium titanate, barium-strontium titanate, strontium titanate, calcium titanate, calcium zirconate, potassium tantalate, and potassium niobate.Type: GrantFiled: June 24, 1997Date of Patent: November 23, 1999Assignee: U.S. Philips CorporationInventors: Markus Haase, Ulrich Kynast, Herbert Boerner, Cornelis Ronda
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Patent number: 5981092Abstract: An organic EL device of the invention includes an inorganic material layer with a resistivity of less than 20 .OMEGA.-cm disposed between an electrode and a light emitting layer. The inorganic material layer contains at least one of indium oxide, tin oxide, and zinc oxide as a primary component, which is the same material as an anode, and at least one of silicon and germanium as an auxiliary component. This improves physical properties at the electrode-organic layer interface and restrains generation of dark spots, establishing an organic EL device featuring a long life, high efficiency and low cost.Type: GrantFiled: March 25, 1997Date of Patent: November 9, 1999Assignee: TDK CorporationInventors: Michio Arai, Masami Mori, Kenji Nakaya
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Patent number: 5968675Abstract: A hole-transporting material having excellent hole transportation capability and sufficient durability, used in an organic EL device and an electrophotographic photoreceptor, the hole-transporting material having the general formula specified in claim 1.Type: GrantFiled: May 28, 1998Date of Patent: October 19, 1999Assignee: Toyo Ink Manufacturing Co., Ltd.Inventors: Michiko Tamano, Satoshi Okutsu, Toshio Enokida
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Patent number: 5955209Abstract: The thin-film electroluminescent device of the present invention comprises a thin film of a polyoxadiazole derivative represented by the formula: ##STR1## wherein each of X.sub.0 and Y.sub.0 independently represents a divalent organic group which may comprise a silicon atom, and n is an integer of 2 or greater,formed as an electroluminescent layer or a charge injecting/transporting layer between electrodes, at least one thereof being transparent. This thin-film electroluminescent device is excellent not only in electroluminescence and capability of charge injection/transport to thereby ensure high light emission efficiency but also in durability such as heat resistance.Type: GrantFiled: May 6, 1996Date of Patent: September 21, 1999Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hideyuki Murata, Takahiro Fujiyama, Shogo Saito, Tetsuo Tsutsui, Tooru Yamanaka
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Patent number: 5935720Abstract: An organic EL device, includes an anode and a cathode, and at least one organic luminescent medium containing a compound of the formula: ##STR1## wherein: R.sub.1, and R.sub.2 are individually alkyl of from 1 to 20 carbon atoms, aryl, carbocyclic and other heterocyclic systems; andR.sub.3, and R.sub.4 are individually alkyl of from 1 to 10 carbon atoms, and a branched or unbranched 5 or 6 member substituent ring connecting with R.sub.1, R.sub.2 respectively; andR.sub.5 is alkyl of from 2-20 carbon atoms; sterically hindered aryl and heteroaryl; andR.sub.6 is alkyl of from 1 to 10 carbon atoms, and a 5 or 6-member carbocyclic ring connecting with R.sub.5.Type: GrantFiled: April 7, 1997Date of Patent: August 10, 1999Assignee: Eastman Kodak CompanyInventors: Chin H. Chen, Ching W. Tang, Jianmin Shi
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Patent number: 5932363Abstract: A luminescent composition containing a mixture of a fluorescent material and a metal chelate compound of the formulaL.sub.n --M.sup.+n (I)wherein M represents a metal; n is a number of from 1 to 3, and L is a ligand of the formula ##STR1## wherein Ar is an aryl; X is selected from the group consisting of oxygen, sulfur, and selenium; N is nitrogen; O is oxygen, and Z is a suitable aromatic component.Type: GrantFiled: October 2, 1997Date of Patent: August 3, 1999Assignee: Xerox CorporationInventors: Nan-Xing Hu, Shuang Xie, Zoran D. Popovic, Beng S. Ong, Ah-Mee Hor
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Patent number: 5928802Abstract: An organic EL device, includes an anode, cathode, and at least one organic luminescent layer including a compound of the formula: ##STR1## where: n is an integer of 2 or 3;M is a divalent metal or a trivalent metal;G is a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, both the aryl and the heteroaryl groups having 6 to 24 carbon atoms, wherein the substituted aryl or heteroaryl group is an alkyl, haloalkyl group having 1-8 carbon atoms, an alkoxy or haloalkoxy group having 1-18 carbon atoms, halogen, cyano, amino, amido, sulfonyl, carbonyl, aryl, or heteroaryl;R.sup.1 and R.sup.2 are individually hydrogen, an alkyl or haloalkyl group having 1-18 carbon atoms, halogen, cyano, amono, amido, sulfonyl, carbonyl, and 5-24 atoms necessary to complete a fused aromatic ring.Type: GrantFiled: May 16, 1997Date of Patent: July 27, 1999Assignee: Eastman Kodak CompanyInventors: Jianmin Shi, Chin H. Chen
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Patent number: 5925473Abstract: A radiation image storage panel having a stimulable phosphor layer and a protective film composed of a plastic material film and a coated layer of a fluororesin-containing resin composition containing light-scattering fine particles gives a radiographic image of improved quality.Type: GrantFiled: March 31, 1998Date of Patent: July 20, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Haruyoshi Kuriyama, Hideki Suzuki, Shinichiro Fukui
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Patent number: 5919579Abstract: An organic electroluminescent device comprising an anode, an organic hole transport layer, an organic emission layer and a cathode layered in this order on a substrate, or, optionally, comprising an additional electron transport layer between the organic emission layer and the cathode, wherein the organic emission layer comprises a naphthalimide derivative represented by formula (1) wherein R.sup.1 is a hydrogen atom, a straight chain or branched chain alkyl group having from 1 to 16 carbon atoms, an aryl group which may have substituents or an aralkyl group which may have substituents, and R.sup.2, R.sup.3, R.sup.4 are special substituents.Type: GrantFiled: January 17, 1997Date of Patent: July 6, 1999Assignee: Hoechst AktiengesellschaftInventors: Wen-Bing Kang, Nu Yu, Akihiko Tokida, Thomas Potrawa, Andreas Winterfeldt