Patents Examined by Dawn L. Garrett
  • Highly photoluminescent organic compounds, synthesis thereof, and use thereof in electroluminescent devices
    Patent number: 8003228
    Abstract: New, highly photoluminescent compounds are described having structural formula (I) wherein: R1, R2, R3, R4, independently from each other, represent H; alkyl, alkenyl; aryl; —(CH2CH2—O)n—CH3. These compounds are highly photoluminescent and have high quantum yield; they have optimal plasticity characteristics and optimal miscibility with other amorphous polymers; they lead to the formation of thin, stable and uniform layers of photoluminescent material, obtainable by simple techniques of deposition from solution. A simple and high yield process is described for obtaining the aforesaid compounds. In addition, the use of the compounds of formula (I) and their polymer derivatives is described in the preparation of electroluminescent devices, for example LEDs.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: August 23, 2011
    Assignee: STMicroelectronics S.r.l.
    Inventors: Giovanna Salzillo, Antonio Roviello, Giuseppina Roviello, Giuseppe Russo
  • Compound for use in organic electroluminescent device and organic electroluminescent device
    Patent number: 7993760
    Abstract: Disclosed are an organic electroluminescent device (organic EL device) which is improved in luminous efficiency, fully secured of driving stability, and simple in constitution and a compound for use therein. The organic electroluminescent device comprises a light-emitting layer disposed between an anode and a cathode piled one upon another on a substrate and the light-emitting layer contains a phosphorescent dopant and a compound for use in an organic electroluminescent device having two or more indolocarbazole skeletons as a host material. An example of the compound having indolocarbazole skeletons for use in the device is expressed by the following formula.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: August 9, 2011
    Assignee: Nippon Steel Chemical Co., Ltd.
    Inventors: Masaki Komori, Toshihiro Yamamoto, Takahiro Kai, Masanori Hotta
  • Naphthalene compound and organic light-emitting device using the compound
    Patent number: 7981525
    Abstract: There is provided an organic light-emitting device having an optical output with a high efficiency and a high luminance, and having good durability. The organic light-emitting device includes an anode, a cathode, and a layer including an organic compound interposed between the anode and the cathode, in which the layer contains a naphthalene compound represented by the general formula (1): wherein Ar1's each represent a substituted or unsubstituted fused ring aromatic hydrocarbon group having four or more rings.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: July 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masashi Hashimoto, Hironobu Iwawaki, Satoshi Igawa, Takao Takiguchi, Shinjiro Okada
  • OLED device with cyclobutene electron injection materials
    Patent number: 7968215
    Abstract: An OLED device including a cathode, an anode, and having therebetween a light-emitting layer and further comprising a first layer between the light-emitting layer and the cathode containing a cyclobutene compound comprising a cyclobutene nucleus substituted in the 1-position with a five- or six-membered heteroaromatic ring group containing at least one trivalent nitrogen atom; substituted in the 2-position with an aromatic ring group; and substituted with a first methylene group in the 3-position and a second methylene group in the 4-position, provided said first and second methylene groups are further disubstituted in the 1?,1?-positions and the 1?,1?-positions with independently selected aromatic groups.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: June 28, 2011
    Assignee: Global OLED Technology LLC
    Inventors: William J. Begley, Natasha Andrievsky
  • White organic light emitting device
    Patent number: 7968214
    Abstract: Provided is a white organic light emitting device comprising an anode, a cathode, and an organic layer formed between the anode and the cathode, wherein the organic layer comprises one green emissive layer, one blue emissive layer, one red emissive layer, and one charge generating layer formed between any two of the foregoing green, blue and red emissive layers. The white organic light emitting device has a tandem structure providing the simplest structure for the three color light emissions of green, blue and red.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: June 28, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae-yong Noh, Junji Kido, Shinichiro Tamura, Euk-che Hwang
  • Organic electroluminescent device and method of preparing the same
    Patent number: 7955717
    Abstract: An organic electroluminescent device and a method of preparing the same are provided. The organic electroluminescent device includes a sealing layer which is formed on a sealing substrate, and which includes a cohesion layer, a transparent polymer layer, and a transparent moisture absorption layer. Since the transparent moisture absorption layer of the organic electroluminescent device is provided to a sealing substrate using an attaching method, the organic electroluminescent device has an improved life span property due to a firm sealed structure and better light extraction efficiency due to the transparent moisture absorption layer below the sealing substrate.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: June 7, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Dong-Soo Choi, Jang-Hyuk Kwon, Jin-Woo Park, Seung-Yong Song, Jong-Hyuk Lee, Yoon-Hyeung Cho
  • Organic EL element and process for manufacture of organic EL element
    Patent number: 7955718
    Abstract: The organic EL element of the invention which achieves the aforementioned object is provided with a base, first and second electrode layers situated facing each other on one side of the base, and a luminescent layer situated between the electrode layers, wherein one of the first electrode layer and the second electrode layer is a hole injection electrode layer while the other is an electron injection electrode layer, an organic thin-film layer made of a vapor depositable polar organic compound with an energy gap of 3.5 eV or greater is provided between the luminescent layer and the electron injection electrode layer, and the organic thin-film layer has a thickness of 0.1 nm-4 nm.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: June 7, 2011
    Assignee: TDK Corporation
    Inventors: Emiko Kambe, Tetsushi Inoue
  • Tandem OLED device with intermediate connector
    Patent number: 7955719
    Abstract: A tandem OLED device including an anode; a cathode; at least two electroluminescent units disposed between the anode and the cathode, wherein each of the electroluminescent units includes at least one hole-transporting layer and one organic light-emitting layer; and an intermediate connector disposed between adjacent electroluminescent units, wherein the intermediate connector includes an n-doped organic layer and an electron-accepting layer, the electron-accepting layer being disposed closer to the cathode than the n-doped organic layer, and wherein the n-doped organic layer includes an alkali metal and an organic alkali metal complex.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: June 7, 2011
    Assignee: Global OLED Technology LLC
    Inventors: Tukaram K. Hatwar, Jeffrey P. Spindler, William J. Begley
  • Light emitting element, light emitting device, and lighting system
    Patent number: 7951470
    Abstract: According to the present invention, a light-emitting element, a light-emitting device, and a lighting system, each of which has a broad spectrum like sunlight and has high color rendering properties, can be obtained. One embodiment of the present invention has a light-emitting device which includes at least two kinds of luminescence center materials, and at least one kind of the luminescence center materials is a quinoxaline derivative represented by the following general formula (1): wherein R1 to R4 are individually hydrogen or an alkyl group having 4 carbon atoms (a straight-chain structure or a branch structure).
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: May 31, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Atsushi Tokuda, Masakazu Egawa
  • Silanylamine-based compound, method of preparing the same and organic light emitting device including organic layer comprising the silanylamine-based compound
    Patent number: 7927719
    Abstract: Silanylamine-based compounds represented by Formula 1 are provided. Methods of preparing the compounds and organic light emitting devices including organic layers comprising the silanylamine-based compounds are also provided. The silanylamine-based compounds have excellent electrical stability and electron transporting capabilities. Thus, the silanylamine-based compounds may be effectively used for red, green, blue, and white fluorescent and phosphorescent materials used to form hole injection layers, hole transport layers, and emissive layers in organic light emitting devices. Organic light emitting devices using these compounds have high efficiency, low driving voltages, high luminance and long lifetimes.
    Type: Grant
    Filed: July 12, 2007
    Date of Patent: April 19, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Seok-Hwan Hwang, Young-Kook Kim, Yoon-Hyun Kwak, Chang-Ho Lee
  • Quinoxaline derivative and light-emitting element, light-emitting device, and electronic device using quinoxaline derivative
    Patent number: 7927720
    Abstract: An object is to provide a novel quinoxaline derivative. Another object is to provide a light-emitting element with low driving voltage. Another object is to provide a light-emitting element with low power consumption. Another object is to provide a light-emitting device and an electronic device with low power consumption by using such a light-emitting element. A quinoxaline derivative which has a structure in which at least one of carbon at a 2-position and carbon at a 3-position of quinoxaline, and carbon of 1,3,4-oxadiazole ring are bound via an arylene group is provided.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: April 19, 2011
    Assignee: Semiconductor Energy laboratory Co., Ltd.
    Inventors: Hiroko Nomura, Hiroshi Kadoma, Sachiko Kawakami, Satoko Shitagaki, Satoshi Seo
  • Compound for organic EL device and light-emitting device
    Patent number: 7927718
    Abstract: A novel compound for an organic EL device is provided which has a structure represented by the general formula (1):
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: April 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Kamatani, Takao Takiguchi, Shinjiro Okada
  • Condensed ring aromatic compound for organic light-emitting device and organic light-emitting device having the same
    Patent number: 7919198
    Abstract: Provided are a condensed ring aromatic compound for an organic light-emitting device, and an organic light-emitting device having optical output with high efficiency and high luminescence and having durability. An organic light-emitting device including an anode and a cathode, and a layer made of an organic compound interposed between the anode and the cathode, wherein at least one layer of the layers made of the organic compound contains a condensed ring aromatic compound shown in the following general formula [1]: wherein R1 to R16 each independently represent a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted amino group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, and may be the same or different.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: April 5, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Chika Negishi, Akihito Saitoh, Hiroki Ohrui, Hironobu Iwawaki, Masanori Muratsubaki
  • Organic light emitting device
    Patent number: 7919199
    Abstract: It is an object of the present invention to provide an organic light emitting device having a long-life optical output. The organic light emitting device according to the present invention is provided with an emission layer including at least a host material, a light emitting material, and another material, wherein the another material has a smaller ionization potential than and almost the same hole mobility as or a greater hole mobility than an ionization potential and a hole mobility of a compound which forms an emission layer-side-interface.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: April 5, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keiji Okinaka, Akihito Saitoh, Naoki Yamada, Masataka Yashima, Koichi Suzuki, Akihiro Senoo, Kazunori Ueno
  • Organic electroluminescent device
    Patent number: 7914909
    Abstract: Provided is an organic electroluminescent device that brings together a high efficiency, high durability, and a high color purity. The organic electroluminescent device includes an anode, a cathode, and a layer including an organic compound interposed between the anode and the cathode, in which the layer contains at least one organic germanium compound having two or more fluorenyl groups per one germanium atom.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: March 29, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taiki Watanabe, Kazunori Ueno, Yohei Iwasaki
  • Light emitting device having dopants in a light emitting layer
    Patent number: 7910227
    Abstract: A light emitting device having an anode and a cathode provided on a substrate, and an organic light emitting layer between the anode and the cathode, where the organic light emitting layer includes a light emitting material and first and second dopants for improving the dispersability thereof. As the first dopant, there is employed a phosphorescent dopant. The amount of the second dopant is greater than the amount of the first dopant.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: March 22, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Manabu Furugori, Shinjiro Okada, Akira Tsuboyama, Takao Takiguchi, Seishi Miura, Takashi Moriyama, Satoshi Igawa, Jun Kamatani, Hironobu Iwawaki
  • Stilbene derivative, light emitting element, light emitting device, and electronic appliance
    Patent number: 7758972
    Abstract: An object is to provide a novel substance which exhibits blue light emission with excellent color purity, and to provide a light emitting element and a light emitting device using the novel substance. A stilbene derivative represented by the general formula (G1) is provided. Note that in the general formula (G1), each of A1 and B1 represents any one of structures represented by the following general formulae (G1-1) to (G1-4). In addition, in each of the general formulae (G1-1) to (G1-4), each of R1 to R24 represents any one of hydrogen and an alkyl group having 1 to 4 carbon atoms. Such a stilbene derivative can exhibit blue light emission with excellent color purity.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: July 20, 2010
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Masakazu Egawa, Sachiko Kawakami, Nobuharu Ohsawa
  • Silanylamine-based compound and organic light-emitting device including organic layer including the silanylamine-based compound
    Patent number: 7754349
    Abstract: A silanylamine-based compound is represented by Formula 1 below. An organic light-emitting device includes an organic layer that includes the silanylamine-based compound: wherein R1, R2, R3, R4, R5, R6, R7, R8, Ar1, Ar2, and Ar3 are as defined in the specification. The silanylamine-based compound has good electrical characteristics and charge transport capability, and thus, is useful as a hole injection material, a hole transport material, and/or an emitting material for fluorescent or phosphorescent devices capable of producing light of a full spectrum of colors, including red, green, blue, and white. Thus, the organic light-emitting device including the organic layer including the silanylamine-based compound shows high efficiency, a low driving voltage, and high brightness.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: July 13, 2010
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Yoon-Hyun Kwak, Seok-Hwan Hwang, Young-Kook Kim
  • Phenanthroline compound and organic light emitting device using the same
    Patent number: 7754348
    Abstract: The present invention discloses a phenanthroline compound which can be used as electron-transporting material in organic electroluminescence devices is disclosed. The mentioned phenanthroline compound is represented by the following. wherein Ar is selected from the group consisting of hydrogen atom, alkyl, aryl, wherein R1, R2 and R3 are identical or different. R1, R2 and R3 are independently selected from the group consisting of hydrogen atom, alkyl, halide, wherein X1, X2 and X3 are identical or different. X1, X2 and X3 are independently selected from the atom or group consisting of O, S, N—R4 and R4 is selected from the group consisting of hydrogen atom, alkyl, aryl.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: July 13, 2010
    Assignee: Luminescene Technology Corp.
    Inventor: Feng Wen Yen
  • Organic electroluminescent element and display device using the same
    Patent number: 7749616
    Abstract: The present invention provides an organic electroluminescent element including an anode, a cathode, and a plurality of organic compound layers including at least one organic luminescent layer between the anode and the cathode, in which the organic luminescent layer contains a host material and two or more phosphorescent materials; the organic luminescent layer is adjacent to the organic compound layers at both an anode side and a cathode side thereof; the organic compound layer disposed adjacent to the organic luminescent layer at the anode side thereby has a thickness of 50 nm or less in thickness; and the organic compound layer disposed adjacent to organic luminescent layer at the cathode side thereby contains a compound having an ionization potential of 6.0 eV or less. The present invention also provides a display device using the organic electroluminescent element.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: July 6, 2010
    Assignee: Fujifilm Corporation
    Inventors: Yoshitaka Kitamura, Kazuki Yamazaki, Masayuki Mishima