Patents by Inventor Musubu Ichikawa

Musubu Ichikawa 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).

  • Publication number: 20220177454
    Abstract: Provided are: a trisubstituted benzene compound represented by general formulae (1) and (2); and an organic electroluminescence (EL) element having a pair of electrodes and at least a pair of organic layers interposed therebetween, the organic EL element being characterized in that said compound is used as a constituent material for at least one organic layer.
    Type: Application
    Filed: March 5, 2020
    Publication date: June 9, 2022
    Applicants: HODOGAYA CHEMICAL CO., LTD., SHINSHU UNIVERSITY
    Inventors: Kazunori TOGASHI, Hideyoshi KITAHARA, Musubu ICHIKAWA
  • Patent number: 10217886
    Abstract: According to example embodiments, a photoelectric conversion device includes a first electrode including a light-receiving surface, a second electrode spaced apart from the first electrode and facing the first electrode, and an auxiliary layer between the second electrode and an exciton producing layer. The first electrode may be on the second electrode. The exciton producing layer may be between the first electrode and the second electrode. The exciton producing layer may be spaced apart from the second electrode by a distance corresponding to one of a crest and a trough of a standing wave of light to be converted into electricity.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: February 26, 2019
    Assignees: Samsung Electronics Co., Ltd., Shinshu University
    Inventors: Kyu Sik Kim, Musubu Ichikawa, Kwang Hee Lee, Kyung Bae Park, Toshiki Takeuchi
  • Patent number: 10059725
    Abstract: The invention provides a light emitting layer host compound and an electron-blocking compound that have high excited triplet levels, and can completely confine the triplet excitons of phosphorescent material, for use as the material of a high-efficient organic electroluminescent device. The invention also provides a high-efficient, high-luminance organic electroluminescent device with the use of the compounds. The compound of the general formula (1) below has a triphenylsilyl group and a triarylamine structure, and the organic electroluminescent device includes a pair of electrodes and at least one organic layer interposed between the pair of electrodes, wherein the compound of the general formula (1) having a triphenylsilyl group and a triarylamine structure is used as constituent material of the at least one organic layer.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: August 28, 2018
    Assignees: Hodogaya Chemical Co., Ltd., Shinshu University
    Inventors: Norimasa Yokoyama, Shuichi Hayashi, Yoshio Taniguchi, Musubu Ichikawa, Shinichi Matsuki
  • Patent number: 9891101
    Abstract: An information-reading element may be provided, which can be made small, and allows the number of adjustment steps to be reduced, and an information-reading device may be provided. An information-reading element may be provided and equipped with a light-emitting element, which serves as a polarized light-emitting part for emitting polarized light as outgoing light, and a light-receiving element, which serves as a polarized light-receiving part for receiving the polarized light as returning light after the polarized light is reflected off a reflecting plate, said reflecting plate being a target object from which information is to be read, wherein the light-emitting element and the light-receiving element have different polarization characteristics from each other.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: February 13, 2018
    Assignees: SHINANO KENSHI CO., LTD., SHINSHU UNIVERSITY
    Inventors: Hiroyuki Nakamura, Musubu Ichikawa
  • Patent number: 9634258
    Abstract: The present invention relates to a compound having a bipyridyl group and a carbazole ring, which is represented by the following general formula (1); and an organic electroluminescent element containing a pair of electrodes and at least one organic layer interposed therebetween, in which the compound is used as a constituent material of the at least one organic layer:
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: April 25, 2017
    Assignees: HODOGAYA CHEMICAL CO., LTD., SHINSHU UNIVERSITY
    Inventors: Norimasa Yokoyama, Naoaki Kabasawa, Musubu Ichikawa, Sohei Otsuru
  • Patent number: 9518224
    Abstract: Provided are a fine-particulate organic semiconductor material, a thin organic semiconductor film and an organic transistor. The fine-particulate organic semiconductor material is in a form of fine particles and is usable as an organic semiconductor material. The fine particles are fine thermotropic liquid crystal particles that undergo a phase transition into a liquid crystal state when heated to a temperature of from 50° C. to 350° C. The fine-particulate organic semiconductor material can easily and uniformly form the thin organic semiconductor film over a large area by a film printing process or a dispersion coating process. The thin organic semiconductor film has high electron mobility and high ON/OFF value.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: December 13, 2016
    Assignees: Shinshu University, Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Musubu Ichikawa, Hyeon-Gu Jeon, Naomi Oguma, Naoki Hirata, Hisao Kono
  • Publication number: 20160011041
    Abstract: An information-reading element may be provided, which can be made small, and allows the number of adjustment steps to be reduced, and an information-reading device may be provided. An information-reading element may be provided and equipped with a light-emitting element, which serves as a polarized light-emitting part for emitting polarized light as outgoing light, and a light-receiving element, which serves as a polarized light-receiving part for receiving the polarized light as returning light after the polarized light is reflected off a reflecting plate, said reflecting plate being a target object from which information is to be read, wherein the light-emitting element and the light-receiving element have different polarization characteristics from each other.
    Type: Application
    Filed: February 27, 2014
    Publication date: January 14, 2016
    Inventors: Hiroyuki NAKAMURA, Musubu ICHIKAWA
  • Patent number: 9133193
    Abstract: Provided are an organic semiconductor material, organic semiconductor thin film and organic thin-film transistor, which contain a perylene tetracarboxylic diimide derivative represented by the following formula (1): In the formula (1), R1 means a linear or branched alkyl group having from 1 to 20 carbon atoms, R2 means a linear or branched alkyl group having from 2 to 6 carbon atoms, R3 means a linear or branched alkyl group having from 2 to 6 carbon atoms, X1 and X2 each mean a heteroatom selected from an oxygen atom, sulfur atom or selenium atom, Y means a halogen atom or cyano group, m stands for a number of from 0 to 4, and n stands for a number of from 0 to 2. Further, the alkyl groups represented by R1 and R2 may each be substituted with one or more fluorine atoms.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: September 15, 2015
    Assignees: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., SHINSHU UNIVERSITY
    Inventors: Musubu Ichikawa, Naoki Hirata, Hisao Kono, Naomi Oguma
  • Patent number: 9005776
    Abstract: A compound having a benzotriazole ring structure and a formula (1): wherein Ar is a substituted or unsubstituted aromatic hydrocarbon group, aromatic heterocyclic group, or condensed polycyclic aromatic group; A and B are the same as or different from each other and each represent a hydrogen atom or a monovalent group of formula (2), provided that A and B are not simultaneously hydrogen atoms: wherein R1 to R8 are the same as or different and each represent a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a linear or branched alkyl group having 1 to 6 carbon atoms, aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or condensed polycyclic aromatic group; m is an integer of 0, 1 or 2; X represents a carbon atom or a nitrogen atom; when X is a nitrogen atom, the nitrogen atom does not have substituents or bonding groups of R1, R2, R3 and R4; and when m is 2, a plurality of R1, R2, R3, R4 and X each are the
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: April 14, 2015
    Assignees: Hodogaya Chemical Co., Ltd., Shinshu University
    Inventors: Norimasa Yokoyama, Shuichi Hayashi, Naoaki Kabasawa, Yoshio Taniguchi, Musubu Ichikawa, Shunji Mochiduki
  • Publication number: 20140048787
    Abstract: An organic compound having excellent electron transport property and hole blocking property as a material for a highly efficient organic EL device, and also provide a highly efficient organic EL device using the compound. This invention relates to a compound having a triazole ring structure to which a substituted pyridyl group is bonded, represented by the following general formula (1), and to an organic electroluminescence device comprising the compound: wherein Ar1 and Ar2, R1, R2, R3, R4, R5, R6, R7, R8, R9 and R10, and m are as defined in the specification.
    Type: Application
    Filed: September 26, 2013
    Publication date: February 20, 2014
    Applicants: NATIONAL UNIVERSITY CORPORATION SHINSHU UNIVERSITY, HODOGAYA CHEMICAL CO., LTD.
    Inventors: Tetsuzo MIKI, Norimasa YOKOYAMA, Yoshio TANIGUCHI, Musubu ICHIKAWA
  • Patent number: 8642189
    Abstract: The invention provides an organic compound which shows an excellent electron-injecting/transporting performance, has a hole-blocking ability and shows a high stability as a film, that is, having excellent characteristics as a material for organic electroluminescent device having high efficiency and high durability; and provides an organic EL device comprising the compound and having high efficiency and high durability.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: February 4, 2014
    Assignees: Hodogaya Chemical Co., Ltd., Shinshu University, National University Corporation
    Inventors: Norimasa Yokoyama, Shuichi Hayashi, Makoto Nagaoka, Yoshio Taniguchi, Musubu Ichikawa
  • Publication number: 20130328041
    Abstract: The present invention relates to a compound having a bipyridyl group and a carbazole ring, which is represented by the following general formula (1); and an organic electroluminescent element containing a pair of electrodes and at least one organic layer interposed therebetween, in which the compound is used as a constituent material of the at least one organic layer:
    Type: Application
    Filed: February 24, 2012
    Publication date: December 12, 2013
    Applicants: SHINSHU UNIVERSITY, HODOGAYA CHEMICAL CO., LTD.
    Inventors: Norimasa Yokoyama, Naoaki Kabasawa, Musubu Ichikawa, Sohei Otsuru
  • Publication number: 20130153884
    Abstract: Provided are a fine-particulate organic semiconductor material, a thin organic semiconductor film and an organic transistor. The fine-particulate organic semiconductor material is in a form of fine particles and is usable as an organic semiconductor material. The fine particles are fine thermotropic liquid crystal particles that undergo a phase transition into a liquid crystal state when heated to a temperature of from 50° C. to 350° C. The fine-particulate organic semiconductor material can easily and uniformly form the thin organic semiconductor film over a large area by a film printing process or a dispersion coating process. The thin organic semiconductor film has high electron mobility and high ON/OFF value.
    Type: Application
    Filed: August 17, 2011
    Publication date: June 20, 2013
    Applicants: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD., SHINSHU UNIVERSITY
    Inventors: Musubu Ichikawa, Hyeon-Gu Jeon, Naomi Oguma, Naoki Hirata, Hisao Kono
  • Patent number: 8466452
    Abstract: A color unit is disclosed in which is included in an imaging device. The color unit includes; a first p-type electrode layer disposed on a light receiving side of the color unit, and including a light-absorptive organic material which selectively absorbs a wavelength other than a desired wavelength in a visible light band of the electromagnetic spectrum, a second p-type electrode layer disposed under the first p-type electrode layer and including a light-absorptive organic material which absorbs a desired wavelength and an n-type electrode layer disposed under the second p-type electrode layer and including an organic material, wherein photoelectric conversion is performed through a p-n junction between the second p-type electrode layer and the n-type electrode layer and light of the desired wavelength is converted into electrical current.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: June 18, 2013
    Assignees: Samsung Electronics Co., Ltd., Shinshu University
    Inventors: Kyu Sik Kim, Musubu Ichikawa, Yusuke Higashi
  • Publication number: 20130049152
    Abstract: According to example embodiments, a photoelectric conversion device includes a first electrode including a light-receiving surface, a second electrode spaced apart from the first electrode and facing the first electrode, and an auxiliary layer between the second electrode and an exciton producing layer. The first electrode may be on the second electrode. The exciton producing layer may be between the first electrode and the second electrode. The exciton producing layer may be spaced apart from the second electrode by a distance corresponding to one of a crest and a trough of a standing wave of light to be converted into electricity.
    Type: Application
    Filed: March 1, 2012
    Publication date: February 28, 2013
    Applicants: SHINSHU UNIVERSITY, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyu Sik Kim, Musubu Ichikawa, Kwang Hee Lee, Kyung Bae Park, Toshiki Takeuchi
  • Publication number: 20120319098
    Abstract: The present invention relates to a substituted pyridyl compound represented by the following general formula (1), (2), or (3) and an organic electroluminescent element containing a pair of electrodes and at least one organic layer interposed therebetween, in which the at least one organic layer contains the substituted pyridyl compound represented by the following general formula (1), (2), or (3).
    Type: Application
    Filed: February 22, 2011
    Publication date: December 20, 2012
    Applicants: SHINSHU UNIVERSITY, HODOGAYA CHEMICAL CO., LTD
    Inventors: Norimasa Yokoyama, Shuichi Hayashi, Musubu Ichikawa, Takayuki Yamamoto
  • Patent number: 8247087
    Abstract: An object of the invention is to provide an organic compound having excellent characteristics as a material for highly efficient and highly durable organic EL devices, and also to provide a highly efficient and highly durable organic EL device. This invention relates to a compound represented by the general formula (1) having an oxadiazole ring structure bonded with an aromatic heterocycle, and to an organic electroluminescence device containing the compound: wherein Ar represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group; A represents a substituted or unsubstituted aromatic heterocyclic group; and n represents an integer of 1 to 3.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: August 21, 2012
    Assignees: Hodogaya Chemical Co., Ltd., Shinshu University
    Inventors: Tetsuzo Miki, Norimasa Yokoyama, Shuichi Hayashi, Shigeru Kusano, Yoshio Taniguchi, Musubu Ichikawa
  • Publication number: 20120199824
    Abstract: Provided are an organic semiconductor material, organic semiconductor thin film and organic thin-film transistor, which contain a perylene tetracarboxylic diimide derivative represented by the following formula (1): In the formula (1), R1 means a linear or branched alkyl group having from 1 to 20 carbon atoms, R2 means a linear or branched alkyl group having from 2 to 6 carbon atoms, R3 means a linear or branched alkyl group having from 2 to 6 carbon atoms, X1 and X2 each mean a heteroatom selected from an oxygen atom, sulfur atom or selenium atom, Y means a halogen atom or cyano group, m stands for a number of from 0 to 4, and n stands for a number of from 0 to 2. Further, the alkyl groups represented by R1 and R2 may each be substituted with one or more fluorine atoms.
    Type: Application
    Filed: October 29, 2010
    Publication date: August 9, 2012
    Applicants: SHINSHU UNIVERSITY, DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Musubu Ichikawa, Naoki Hirata, Hisao Kono, Naomi Oguma
  • Patent number: 8227096
    Abstract: This invention relates to an arylamine compound having a molecular weight of 1,500 to 6,000 represented by formula (1), and to an organic electroluminescence device having a pair of electrodes and at least one organic layer sandwiched therebetween, wherein the arylamine compound of formula (1) is used as a constituting material of the at least one organic layer: wherein X represents a single bond, CH or CH2, or N or NH; Ar1 and Ar2 are respectively the same and each represents a substituted or unsubstituted phenylene group; R1, R2, R3, and R4 each independently represents an aryl group, wherein the aryl group may be substituted by a diarylamine group in such a manner as to form a triphenylamine partial structure, and the aryl group at the terminal may be substituted, by repetition, by a diarylamino group in such a manner as to form a triphenylamine partial structure; m represents an integer of 0 to 2; and n represents 0 or 1.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: July 24, 2012
    Assignees: Hodogaya Chemical Co., Ltd., Shinshu University
    Inventors: Tetsuzo Miki, Norimasa Yokoyama, Yoshio Taniguchi, Musubu Ichikawa
  • Publication number: 20120012831
    Abstract: A compound having a benzotriazole ring structure and a formula (1): wherein Ar is a substituted or unsubstituted aromatic hydrocarbon group, aromatic heterocyclic group, or condensed polycyclic aromatic group; A and B are the same as or different from each other and each represent a hydrogen atom or a monovalent group of formula (2), provided that A and B are not simultaneously hydrogen atoms: wherein R1 to R8 are the same as or different and each represent a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a linear or branched alkyl group having 1 to 6 carbon atoms, aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or condensed polycyclic aromatic group; m is an integer of 0, 1 or 2; X represents a carbon atom or a nitrogen atom; when X is a nitrogen atom, the nitrogen atom does not have substituents or bonding groups of R1, R2, R3 and R4; and when m is 2, a plurality of R1, R2, R3, R4 and X each are the s
    Type: Application
    Filed: March 17, 2010
    Publication date: January 19, 2012
    Applicants: Shinshu University, Hodogaya Chemical Co., Ltd.
    Inventors: Norimasa Yokoyama, Shuichi Hayashi, Naoaki Kabasawa, Yoshio Taniguchi, Musubu Ichikawa, Shunji Mochiduki