Patents Examined by Dawn L. Garrett
  • Organic electroluminescent display device
    Patent number: 6893744
    Abstract: Disclosed is an organic electroluminescent display device. The present invention includes a transparent substrate, an anode formed on the transparent substrate, an organic layer stacked on the anode, a cathode formed on the organic layer, and a buffer layer formed between the cathode and organic layer, the buffer layer including a first material selected from the group consisting of an alkaline metal and an alkaline earth metal compound and a second material selected from the group consisting of an organic compound and an organic metal compound.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: May 17, 2005
    Assignee: LG Electronics Inc.
    Inventors: Myung Seop Kim, Hyoung Yun Oh
  • Organic element for electroluminescent devices
    Patent number: 6824893
    Abstract: Disclosed is an OLED device comprising a light-emitting layer containing a host and a dopant where the dopant comprises a boron compound containing a bis(azinyl)methene boron complex group.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: November 30, 2004
    Assignee: Eastman Kodak Company
    Inventors: Benjamin P. Hoag, Denis Y. Kondakov
  • Organic electroluminescent display panel
    Patent number: 6808828
    Abstract: Provision of an organic electroluminescent display panel having an increased life span and a decreased thickness. The organic electroluminescent display panel comprises an organic layer formed on a glass substrate, a sealing member provided on the substrate for covering the organic layer. A drying agent is provided inside the sealing member, also provided inside the sealing member is an initial moisture absorbent constituted by a photopolymerization initiator-containing resin capable of absorbing moisture by a photopolymerization reaction. Immediately after the sealing member is attached, the initial moisture absorbent is allowed to produce an effect of removing the initial moisture existing inside the sealing member.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: October 26, 2004
    Assignee: Tohoku Pioneer Corporation
    Inventor: Hiroshi Ohata
  • Transfer film and process for producing organic electroluminescent device using the same
    Patent number: 6805979
    Abstract: A transfer film comprising a base film, a transfer layer, and a transfer auxiliary layer formed between the base film and the transfer layer so as to be in contact with at least the transfer layer, this transfer auxiliary layer having a melting point or a glass transition temperature lower than that of the transfer layer, wherein at least a portion of the transfer layer can be thermally transferred onto a substrate.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: October 19, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Ogura, Shinji Yamana, Tomonori Akai
  • Encapsulation of an organic electro-luminescence element for a display device and method thereof
    Patent number: 6803127
    Abstract: An encapsulation of an organic electro-luminescence element is provided. A luminescent body is formed on the inner surface of a first substrate. A second substrate serves as a planar sealing case. A sealing agent is formed on the rims of the first substrate and the second substrate to bond the first substrate and the second substrate and form an airtight space. A first drying layer is formed on the inner surface of the second substrate within the airtight space.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: October 12, 2004
    Assignee: Au Optronics Corp.
    Inventors: Chih-Hung Su, Chih-Feng Sung
  • Organic electroluminescent device
    Patent number: 6803128
    Abstract: An organic electroluminescent (EL) device and a method of manufacturing the same utilize a cathode, an anode, and organic layers formed between the cathode and the anode, wherein the cathode includes a first cathode containing aluminum, and a second cathode disposed under the first cathode, formed in the vicinity of an organic layer and containing a metal having a work function of 3.5 to 5.0 eV, and metallic carboxylate represented by: RCOOM  Formula 1 wherein M is an alkali metal or alkaline-earth metal, and R is a C1-C10 alkyl or C6-C20 aryl.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: October 12, 2004
    Assignee: Samsung Oled Co., Ltd.
    Inventor: Il Han Lee
  • Organic electroluminescent device having an adhesion-promoting layer for use with a magnesium cathode
    Patent number: 6794061
    Abstract: An organic electroluminescent device is provided that includes an anode and a substantially pure Mg cathode, an electroluminescent medium disposed between the anode and the cathode, and an adhesion-promoting layer in contact with cathode and the electroluminescent medium. The adhesion-promoting layer comprises at least one metal or metal compound selected from group 1 through group 15 of the Periodic Table of Elements such that the metal has an atomic number of at least 19.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: September 21, 2004
    Assignee: Eastman Kodak Company
    Inventors: Liang-Sheng L. Liao, Joseph K. Madathil, Pranab K. Raychaudhuri, Ching W. Tang
  • White light emitting organic electroluminescent device and method for fabricating the same
    Patent number: 6759145
    Abstract: The present invention discloses a white light emitting organic electroluminescent (EL) device and a method for fabricating the same. The device comprises: a substrate; an anode formed on the substrate; at least one hole transporting layer formed on the anode; at least one luminescent layer (DPVBi) formed on the hole transporting layer, wherein a first dopant (DCM2) is doped into the luminescent layer; at least one electron transporting layer formed on the luminescent layer, wherein a second dopant (C6) is doped into the electron transporting layer; and a cathode formed on the electron transporting layer; wherein a first light (red) is emitted by the first dopant, a second light (green) is emitted by the second dopant, and a third light (blue) is emitted by the luminescent layer when the device is applied with a bias voltage.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: July 6, 2004
    Assignee: Opto Tech Corporation
    Inventors: Ming-Der Lin, San Bao Lin, Feng-Ju Chuang
  • Organic-electroluminescence device, process for its production and organic-electroluminescence display system
    Patent number: 6696181
    Abstract: A composition containing a high-molecular compound having as a photo-crosslinkable group any of a cinnamoyl group, a cinnamylidene group, a chalcone residual group, an isocoumarin residual group, a 2,5-dimethoxystilbene residual group, a thymine residual group, a styrylpyridinium residual group, an &agr;-phenylmaleimide residual group, an anthracene residual group and a 2-pyrone residual group, or an aromatic bisazide, is cross-linked by light irradiation via a mask to cure the composition in a prescribed pattern to form photoemission layers.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: February 24, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Masaaki Okunaka, Takashi Inoue, Yoshiharu Nagae, Yuji Mori
  • Organic electroluminescent device having a stabilizing dopant in a hole-transport layer or in an electron-transport layer distant from the emission layer
    Patent number: 6692846
    Abstract: An organic electroluminescent device includes a substrate; an anode and a cathode positioned relative to the substrate; an emission layer disposed between the anode and the cathode; a hole-transport layer disposed between the anode and the emission layer; and an electron-transport layer disposed between the cathode and the emission layer. The hole-transport layer includes two or more sublayers, one sublayer containing a stabilizing dopant, and the sublayer adjacent to the emission layer containing no stabilizing dopant. Alternatively or in addition, the electron-transport layer includes two or more sublayers, one sublayer containing a stabilizing dopant, and the sublayer adjacent to the emission layer containing no stabilizing dopant. The stabilizing dopant includes rubrene or derivatives thereof.
    Type: Grant
    Filed: June 20, 2002
    Date of Patent: February 17, 2004
    Assignee: Eastman Kodak Company
    Inventors: Tukaram K. Hatwar, Ralph H. Young
  • Display screen, in particular a color display screen, coating of the same and means for producing the coating
    Patent number: 6673473
    Abstract: The invention relates to a display screen, in particular a color display screen, based on a display screen support with a single-layer or multi-layer coating which contains a red luminous substance and a coloring pigment. The invention is furthermore directed towards the display screen coating, means for the production thereof and a coated red luminous substance capable of being used for this purpose. A feature of the invention, is the presence of red tantalum (V) nitride by way of pigment for the purpose of increasing the contrast and decreasing the reflection of the display screen.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: January 6, 2004
    Assignee: Ferro GmbH
    Inventor: Hans-Peter Letschert
  • Organic electroluminescent devices with high luminance
    Patent number: 6670053
    Abstract: Disclosed is a multilayer electroluminescent device comprising an anode, a hole transport layer (HTL), a light emitting layer (LEL), an electron transport layer (ETL), and a cathode, in that order, wherein there is located between the HTL and the LEL an interlayer (IL) comprising a compound containing a 3-phenylindolyl group.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: December 30, 2003
    Assignee: Eastman Kodak Company
    Inventor: Scott R. Conley
  • Electronic device and process for producing the same
    Patent number: 6660409
    Abstract: Electrically functional electronic device including an organic electroluminescence device is protected with a dense protective film, e.g. a silicon oxynitride film, formed on at least one part of the outer surface of the device at a low temperature by ECR plasma sputtering can prevent permeation of moisture, oxygen etc. into the device from the outside.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: December 9, 2003
    Assignees: Panasonic Communications Co., Ltd
    Inventors: Takahiro Komatsu, Akira Gyoutoku, Shintaro Hara, Takafumi Hamano, Hiroshi Nakashima, Dawei Gao, Katsunori Muraoka, Katsuhiko Furukawa
  • Radiographic phosphor panel having improved speed and sharpness
    Patent number: 6652996
    Abstract: A radiographic phosphor panel exhibits provides increased photospeed and image sharpness in exposed radiographic films. This panel includes a phosphor layer that transmits actinic radiation in a range that is reflected by a transparent, polymeric multi-layer reflector used as part of a support. This polymeric multi-layer reflector exhibits a different level of reflectance of light depending upon the angle of light incidence that is greater than 0 and up to and including 90 degrees. On the opposing surface of the reflector is a light absorbing substrate.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: November 25, 2003
    Assignee: Eastman Kodak Company
    Inventors: David J. Steklenski, Peter T. Aylward
  • Electroluminance device
    Patent number: 6649284
    Abstract: An organic EL device includes an anode, a cathode and an EL element arranged between the two. The EL element includes a substance represented by the following chemical formula: in which m, n=1-3; the substitute R is selected from a group consisting of t-butyl, phenyl, methylphenyl, naphehyl and heterocyclic compound. The EL element is highly efficient, lower-voltage operative and easy to be synthesized.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: November 18, 2003
    Assignee: Industrial Technology Research Institute
    Inventors: Yi-Fan Wang, Wen-Kuo Weng, Po-Yen Lu
  • Light-emitting EL display device
    Patent number: 6641933
    Abstract: By repeating a purification process of a light-emitting organic compound several times, a thin film made of the light-emitting organic compound to be used in an EL display device contains ionic impurities at the concentration of 0.1 ppm or lower and has a volume resistivity in the range of 3×1010 &OHgr;cm or larger. By using such a thin film as a light-emitting layer in the EL device, a current caused by reasons other than the carrier recombination can be prevented from flowing through the thin film, and deterioration caused by unnecessary heat generation can be suppressed. Accordingly, it is possible to obtain an EL display device with high reliability.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: November 4, 2003
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Toshimitsu Konuma, Mayumi Mizukami
  • Organic electroluminescent device and method of manufacture thereof
    Patent number: 6635365
    Abstract: An organic EL device having a low driving voltage and exhibiting high luminous brightness and superior durability, and a method of manufacturing the same. The organic EL device has an anode layer, an organic light-emitting layer, and a cathode layer. An inorganic thin layer, comprising an inorganic compound of Ge, Sn, Zn, Cd, etc. and an inorganic compound of an element of Group 5A to Group 8 in the periodic table in combination, is provided between the anode layer and the organic light-emitting layer and between the cathode layer and the organic light-emitting layer, or the anode layer or the cathode layer comprises a chalcogenide of Si, Ge, Sn, Pb, Ga, In, Zn, Cd, Mg, etc. and an inorganic compound of an element of Group 5A to Group 8 in the periodic table in combination.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: October 21, 2003
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hisayuki Kawamura, Hiroaki Nakamura, Chishio Hosokawa
  • Organic electroluminescence device
    Patent number: 6617051
    Abstract: The invention is an organic electroluminescent device that comprises organic compound layer(s) including at least one organic emitting layer sandwiched between a pair of electrodes, wherein at least one organic compound layer is formed from an organic compound material having an impurity concentration of lower than 1000 ppm. The device has the advantages of applicability to lightweight, thin and low-voltage driving displays, good luminescent capacity attenuating little even in long-term driving operation, and good durability.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: September 9, 2003
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hisahiro Higashi, Toshio Sakai, Chishio Hosokawa
  • Formulations for cleaning hard surfaces based on at least partly branched-chain alkyl oligoglucosides
    Patent number: 6555515
    Abstract: The invention relates to new formulations for cleaning hard surfaces containing—based on the formulation—1 to 50% by weight of alkyl oligoglucosides corresponding to formula (I): R1O—[G]p  (I) in which R1 is an at least partly branched alkyl radical containing 9 to 11 carbon atoms, G is a glucose unit and p is a number of 1.4 to 2.0. The products are distinguished by an improved cleaning performance in relation to formulations based on linear alkyl oligoglucosides.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: April 29, 2003
    Assignee: Henkel Kommanitgesellschaft auf Aktien
    Inventors: Udo Hees, Eva Kiewert, Rainer Eskuchen
  • Ophthalmic composition with regulated viscosity
    Patent number: 6511949
    Abstract: An ophthalmic composition having regulated viscosity characterized in that it contains polyoxyethylene polyoxypropylene glycol or polyoxyethylene-polyoxypropylene-substituted ethylenediamine in association with a pharmaceutically acceptable thickener and has a viscosity ranging from 1 cps to 8 cps at 200° C., which is useful as contact lens wetting solution, eye drops, cleaning agent, and preservative for contact lenses.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: January 28, 2003
    Assignee: Rohto Pharmaceutical Co., Ltd.
    Inventors: Hiroo Nitta, Kaori Ogawa