Patents by Inventor Fumio Okuda
Fumio Okuda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8778510Abstract: A pyrromethene-boron complex compound represented by the following formula (1); wherein Z1 and Z2 are independently a hydrogen atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group or a substituted or unsubstituted aryloxy group, at least one of Z1 and Z2 is an alkoxy group substituted with a fluorine atom or an aryloxy group substituted with a fluorine atom or a fluoroalkyl group, and Z1 and Z2 may form a ring.Type: GrantFiled: February 25, 2010Date of Patent: July 15, 2014Assignee: Idemitsu Kosan Co., Ltd.Inventors: Fumio Okuda, Kiyoshi Ikeda, Takayasu Sado, Takahiko Ochi, Yoshimitsu Tanabe, Bunji Sawano
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Publication number: 20120169219Abstract: A metal complex compound having a special structure containing metals such as iridium. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the above metal complex compound, which emits light by applying an electric voltage between the pair of electrode. An organic EL device employing the novel metal complex compound emits various phosphorous lights including blue light having an enhanced current efficiency and prolonged lifetime.Type: ApplicationFiled: March 5, 2012Publication date: July 5, 2012Applicant: Idemitsu Kosan Co., Ltd.Inventors: Fumio OKUDA, Toshihiro Iwakuma, Keiko Yamamichi, Chishio Hosokawa
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Patent number: 8178874Abstract: A metal complex compound having a special structure containing metals such as iridium. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the above metal complex compound, which emits light by applying an electric voltage between the pair of electrode. An organic EL device employing the novel metal complex compound emits various phosphorous lights including blue light having an enhanced current efficiency and prolonged lifetime.Type: GrantFiled: September 30, 2010Date of Patent: May 15, 2012Assignee: Idemitsu Kosan Co., Ltd.Inventors: Fumio Okuda, Toshihiro Iwakuma, Keiko Yamamichi, Chishio Hosokawa
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Publication number: 20120037890Abstract: A pyrromethene-boron complex compound represented by the following formula (1); wherein Z1 and Z2 are independently a hydrogen atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group or a substituted or unsubstituted aryloxy group, at least one of Z1 and Z2 is an alkoxy group substituted with a fluorine atom or an aryloxy group substituted with a fluorine atom or a fluoroalkyl group, and Z1 and Z2 may form a ring.Type: ApplicationFiled: February 25, 2010Publication date: February 16, 2012Inventors: Fumio Okuda, Kiyoshi Ikeda, Takayasu Sado, Takahiko Ochi, Yoshimitsu Tanabe, Bunji Sawano
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Patent number: 8106390Abstract: A metal complex compound having a special structure containing metals such as iridium. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the above metal complex compound, which emits light by applying an electric voltage between the pair of electrode. An organic EL device employing the novel metal complex compound emits various phosphorous lights including blue light having an enhanced current efficiency and prolonged lifetime.Type: GrantFiled: February 18, 2010Date of Patent: January 31, 2012Assignee: Idemitsu Kosan Co., Ltd.Inventors: Fumio Okuda, Toshihiro Iwakuma, Keiko Yamamichi, Chishio Hosokawa
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Patent number: 7999103Abstract: Provided are an organic electroluminescence device whose wavelength of light emission is short and which can emit blue light having a high color purity, and a metal complex compound for realizing the device. The metal complex compound is of a specific structure having a partial structure including two tridentate ligands. The organic electroluminescence device includes: a pair of electrodes; and an organic thin film layer which has one layer or a plurality of layers including at least a light emitting layer and is disposed between the pair of electrodes. In the organic electroluminescence device, at least one layer of the organic thin film layer contains the metal complex compound. The organic electroluminescence device emits light by applying a voltage between both the electrodes.Type: GrantFiled: December 8, 2006Date of Patent: August 16, 2011Assignees: Chuo University, Idemitsu Kosan Co., Ltd.Inventors: Masa-aki Haga, Li-fen Yang, Masumi Itabashi, Misa Ashizawa, Fumio Okuda
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Publication number: 20110017984Abstract: A metal complex compound having a special structure containing metals such as iridium. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the above metal complex compound, which emits light by applying an electric voltage between the pair of electrode. An organic EL device employing the novel metal complex compound emits various phosphorous lights including blue light having an enhanced current efficiency and prolonged lifetime.Type: ApplicationFiled: September 30, 2010Publication date: January 27, 2011Applicant: Idemitsu Kosan Co., Ltd.Inventors: Fumio Okuda, Toshihiro Iwakuma, Keiko Yamamichi, Chishio Hosokawa
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Publication number: 20100155713Abstract: A metal complex compound having a special structure containing metals such as iridium. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the above metal complex compound, which emits light by applying an electric voltage between the pair of electrode. An organic EL device employing the novel metal complex compound emits various phosphorous lights including blue light having an enhanced current efficiency and prolonged lifetime.Type: ApplicationFiled: February 18, 2010Publication date: June 24, 2010Applicant: Idemitsu Kosan Co., LTD.Inventors: Fumio Okuda, Toshihiro Iwakuma, Keiko Yamamichi, Chishio Hosokawa
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Patent number: 7667228Abstract: A metal complex compound having a special structure containing metals such as iridium. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the above metal complex compound, which emits light by applying an electric voltage between the pair of electrode. An organic EL device employing the novel metal complex compound emits various phosphorous lights including blue light having an enhanced current efficiency and prolonged lifetime.Type: GrantFiled: July 21, 2004Date of Patent: February 23, 2010Assignee: Idemitsu Kosan Co., Ltd.Inventors: Fumio Okuda, Toshihiro Iwakuma, Keiko Yamamichi, Chishio Hosokawa
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Patent number: 7625639Abstract: A metal-complex compound which comprises a tridentate chelate ligand having a specified partial structure. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the metal-complex compound, which emits light by applying an electric voltage between the pair of electrode. The present invention provides an organic EL device which emits blue light with high purity and of short wavelength with an enhanced efficiency of light emission.Type: GrantFiled: November 10, 2005Date of Patent: December 1, 2009Assignees: Idemitsu Kosan Co., Ltd., Chuo UniversityInventors: Masa-aki Haga, Fumio Okuda
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Publication number: 20090102363Abstract: Provided are an organic electroluminescence device which: can emit blue light having a short wavelength and a high color purity; and can be combined with any other light emitting compound to emit white light and a metal complex compound for realizing the device. The metal complex compound is of a specific structure having a tridentate chelate ligand and an electron withdrawing group. The organic electroluminescence device has an organic thin film layer formed of one or more layers including at least a light emitting layer, the organic thin film layer being interposed between a pair of electrodes. In the organic electroluminescence device, at least one layer of the organic thin film layer contains the metal complex compound, and emits light by applying a voltage between both the electrodes.Type: ApplicationFiled: June 30, 2008Publication date: April 23, 2009Applicants: IDEMITSU KOSAN CO., LTD., CHUO UNIVERSITYInventors: Masa-aki HAGA, Masumi ITABASHI, Misa ASHIZAWA, Fumio OKUDA, Toshinari OGIWARA, Hideaki NAGASHIMA
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Publication number: 20090085469Abstract: A metal complex compound with a structure containing metals such as iridium, and a monodentate ligand such as a hydrogen atom other than a bidentate ligand. An employment of a metal compound with a ligand having two oxygen atoms as a material for preparing the metal complex compound. An organic electroluminescence device being composed of one or more organic thin film layers having at least a light emitting layer sandwiched between a pair of electrodes wherein at least one of the organic thin film layer contains the metal complex compound. The organic electroluminescence device has an excellent stability, a great efficiency and a long lifetime of light emission due to the metal complex compound.Type: ApplicationFiled: February 27, 2006Publication date: April 2, 2009Applicant: Idemitsu Kosan Co., Ltd.Inventors: Fumio Okuda, Masami Watanabe, Hidetsugu Ikeda
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Publication number: 20090039767Abstract: Provided are an organic electroluminescence device which: can emit blue light having a short wavelength and a high color purity; and can be combined with any other light emitting compound to emit white light and a metal complex compound for realizing the device, and a material for an organic electroluminescence device. The metal complex is of a specific structure having a tridentate chelate ligand and an electron withdrawing group. The material for an organic electroluminescence device is formed of the metal complex compound. The organic electroluminescence device has an organic thin film layer formed of one or more layers including at least a light emitting layer, the organic thin film layer being interposed between a pair of electrodes. In the organic electroluminescence device, at least one layer of the organic thin film layer contains the metal complex compound, and emits light by applying a voltage between both the electrodes.Type: ApplicationFiled: August 3, 2007Publication date: February 12, 2009Applicants: IDEMITSU KOSAN CO., LTD., CHUO UNIVERSITYInventors: Masa-aki Haga, Masumi Itabashi, Misa Ashizawa, Fumio Okuda, Toshinari Ogiwara, Hideaki Nagashima
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Publication number: 20070210699Abstract: A metal-complex compound which comprises a tridentate chelate ligand having a specified partial structure. An organic electroluminescence device which comprises one or more organic thin film layers having at least one light emitting layer sandwiched between a pair of electrodes, wherein the organic thin film layer comprises the metal-complex compound, which emits light by applying an electric voltage between the pair of electrodes. The present invention provides an organic EL device which emits blue light of high purity and of short wavelength together with a metal-complex compound realizing the organic EL device.Type: ApplicationFiled: September 6, 2006Publication date: September 13, 2007Applicants: Chuo University, Idemitsu Kosan Co., Ltd.Inventors: Masa-aki Haga, Li-fen Yang, Fumio Okuda
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Publication number: 20070141398Abstract: Provided are an organic electroluminescence device whose wavelength of light emission is short and which can emit blue light having a high color purity, and a metal complex compound for realizing the device. The metal complex compound is of a specific structure having a partial structure including a tridentate ligand. The organic electroluminescence device includes: a pair of electrodes; and an organic thin film layer which has one layer or a plurality of layers including at least a light emitting layer and is disposed between the pair of electrodes. In the organic electroluminescence device, at least one layer of the organic thin film layer contains the metal complex compound. The organic electroluminescence device emits light by applying a voltage between both the electrodes.Type: ApplicationFiled: December 13, 2006Publication date: June 21, 2007Applicant: Idemitsu Kosan Co., Ltd.Inventor: Fumio OKUDA
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Publication number: 20070138437Abstract: Provided are an organic electroluminescence device whose wavelength of light emission is short and which can emit blue light having a high color purity, and a metal complex compound for realizing the device. The metal complex compound is of a specific structure having a partial structure including two tridentate ligands. The organic electroluminescence device includes: a pair of electrodes; and an organic thin film layer which has one layer or a plurality of layers including at least a light emitting layer and is disposed between the pair of electrodes. In the organic electroluminescence device, at least one layer of the organic thin film layer contains the metal complex compound. The organic electroluminescence device emits light by applying a voltage between both the electrodes.Type: ApplicationFiled: December 8, 2006Publication date: June 21, 2007Applicants: Chuo University, Idemitsu Kosan Co., Ltd.Inventors: Masa-aki Haga, Li-fen Yang, Masumi Itabashi, Misa Ashizawa, Fumio Okuda
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Publication number: 20070141397Abstract: The present invention relates to a transition metal complex compound of a specific structure having a metal carbene bond and an organic electroluminescent device in which an organic thin film layer comprising a single layer or plural layers having at least a light emitting layer is interposed between an anode and a cathode, wherein at least one layer in the organic thin film layer contains the transition metal complex compound described above, and provided are an organic EL device having a high luminous efficiency and emitting blue light and a transition metal complex compound materializing the same.Type: ApplicationFiled: December 13, 2006Publication date: June 21, 2007Applicant: IDEMITSU KOSAN CO., LTDInventors: Masami Watanabe, Fumio Okuda
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Publication number: 20060197077Abstract: A metal complex compound having a special structure containing metals such as iridium. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein the organic thin film layer comprises the above metal complex compound, which emits light by applying an electric voltage between the pair of electrode. An organic EL device employing the novel metal complex compound emits various phosphorous lights including blue light having an enhanced current efficiency and prolonged lifetime.Type: ApplicationFiled: July 21, 2004Publication date: September 7, 2006Inventors: Fumio Okuda, Toshihiro Iwakuma, Keiko Yamamichi, Chishio Hosokawa
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Patent number: 7087315Abstract: A method for forming a plating film, comprising the steps of: applying a plating film onto an object to be plated at a first current density for a predetermined period in a plating bath having a cathode capable of varying current and an anode and; and maintaining the object to be plated at a second current density lower than the first current density. According to the present invention, it is possible to improve solderability of a plating film for conventional lead-free solder by a simple method, which allows the productivity to further enhanced, resulting in a plating film with reduced production costs.Type: GrantFiled: September 21, 2004Date of Patent: August 8, 2006Assignees: Sharp Kabushiki Kaisha, Kobe Leadmikk Co., Ltd.Inventors: Yoshihiko Matsuo, Ryukichi Ikeda, Kimihiko Yoshida, Fumio Okuda
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Publication number: 20060163542Abstract: A metal-complex compound having a special structure containing metals such as iridium. An organic electroluminescence device which comprises at least one organic thin film layer sandwiched between a pair of electrodes, wherein the organic thin film layer comprises the metal-complex compound. The organic electroluminescence device employing the metal-complex compound exhibits an enhanced current efficiency and prolonged lifetime.Type: ApplicationFiled: December 7, 2005Publication date: July 27, 2006Applicant: Idemitsu Kosan Co., Ltd.Inventors: Ryusuke Watanabe, Fumio Okuda, Keiko Yamamichi, Toshihiro Iwakuma, Seiji Tomita