Patents by Inventor Akishige Murakami
Akishige Murakami 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: 11718927Abstract: There is provided a method of manufacturing a crystal substrate, including: preparing a first crystal body which is a substrate comprising a single crystal of group III nitride produced by a vapor phase method and having a first main surface, and in which c-plane of the single crystal is curved in a concave spherical shape with a predetermined curvature; and growing a second crystal body comprising a single crystal of group III nitride on the first main surface, in a mixed melt containing an alkali metal and a group III element.Type: GrantFiled: March 14, 2019Date of Patent: August 8, 2023Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Takehiro Yoshida, Masatomo Shibata, Seiji Sarayama, Takashi Sato, Naoya Miyoshi, Akishige Murakami
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Publication number: 20190292682Abstract: There is provided a method of manufacturing a crystal substrate, including: preparing a first crystal body which is a substrate comprising a single crystal of group III nitride produced by a vapor phase method and having a first main surface, and in which c-plane of the single crystal is curved in a concave spherical shape with a predetermined curvature; and growing a second crystal body comprising a single crystal of group III nitride on the first main surface, in a mixed melt containing an alkali metal and a group III element.Type: ApplicationFiled: March 14, 2019Publication date: September 26, 2019Inventors: Takehiro YOSHIDA, Masatomo SHIBATA, Seiji SARAYAMA, Takashi SATO, Naoya MIYOSHI, Akishige MURAKAMI
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Patent number: 9041997Abstract: An electro-chromic display element includes a display electrode 1 provided on a display substrate 1b an electro-chromic layer 3 provided on the display electrode 1; multiple opposing electrodes 2 which are provided on an opposing substrate 2b and which are arranged to oppose the display electrode 1; an electrolytic layer 4 provided between the display electrode 1 and the multiple opposing electrodes 2; and an erasing electrode 5 placed between the display electrode 1 and the multiple opposing electrodes 2 and which is arranged such that the electro-chromic layer 3 is placed between the third electrode and the display electrode 1.Type: GrantFiled: May 15, 2012Date of Patent: May 26, 2015Assignee: RICOH COMPANY, LTD.Inventors: Hiroyuki Takahashi, Tohru Yashiro, Koh Fujimura, Akishige Murakami, Shigenobu Hirano, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji, Sukchan Kim
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Patent number: 8902151Abstract: An electrochromic display device includes a display substrate, a counter substrate facing the display substrate, counter electrodes arranged on the counter substrate, an electrolyte layer arranged between the display substrate and the counter electrodes, display electrodes separately arranged from one another between the display substrate and the counter electrodes, electrochromic layers to develop or reduce a color by redox reactions, the electrochromic layers being formed on the respective display electrodes arranged such that the electrochromic layers face the set of the counter electrodes, a voltage applying unit to select one of the display electrodes to connect the selected display electrode and the counter electrodes to apply a voltage between the connected display electrode and counter electrodes, a disconnecting unit to disconnect the unselected display electrodes from the counter electrodes, and an interelectrode connecting unit to connect the display electrodes.Type: GrantFiled: December 2, 2011Date of Patent: December 2, 2014Assignee: Ricoh Company, Ltd.Inventors: Tohru Yashiro, Shigenobu Hirano, Yoshihisa Naijo, Koh Fujimura, Akishige Murakami, Hiroyuki Takahashi, Yoshinori Okada
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Patent number: 8743048Abstract: A disclosed electrochromic display element includes a display substrate, a counter substrate facing the display substrate, display electrodes arranged between the display substrate and the counter substrate, electrochromic layers formed on the respective display electrodes, a plurality of drive elements arranged on the counter substrate at predetermined intervals, a plurality of pixel electrodes arranged on the drive elements, a charge retention layer formed over the pixel electrodes as a continuous layer, the charge retention layer being formed of a mixed film including a polymer and one of electric conductive microparticles and semiconductor microparticles, and an electrolyte layer sandwitched between the display substrate and the charge retention layer.Type: GrantFiled: November 30, 2011Date of Patent: June 3, 2014Assignee: Ricoh Company, Ltd.Inventors: Hiroyuki Takahashi, Yoshinori Okada, Tohru Yashiro, Akishige Murakami, Shigenobu Hirano, Yoshihisa Naijo
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Patent number: 8736941Abstract: An electrochromic display apparatus is disclosed that includes a stacked body which includes a display electrode and an electrochromic layer that are stacked on each other; a film which includes through holes, and is disposed on one of the display electrode and the electrochromic layer of the stacked body; and an opposed substrate on which an opposed electrode that faces toward the display electrode is formed.Type: GrantFiled: March 11, 2011Date of Patent: May 27, 2014Assignee: Ricoh Company, Ltd.Inventors: Yoshihisa Naijo, Tohru Yashiro, Shigenobu Hirano, Masahiro Yanagisawa, Masahiro Masuzawa, Akishige Murakami, Hiroyuki Takahashi, Koh Fujimura, Yoshinori Okada
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Patent number: 8711297Abstract: A display device includes a substrate; a matrix of scan lines and signal lines formed on the substrate; switching elements formed in pixel areas defined by the scan lines and the signal lines crossing each other; a first insulating film formed over the scan lines, the signal lines, and the switching elements; and display elements to be driven by the switching elements. The pixel areas are located in a display area and the first insulating film has openings above the scan lines or the signal lines in an outer area outside of the display area.Type: GrantFiled: February 18, 2010Date of Patent: April 29, 2014Assignee: Ricoh Company, Ltd.Inventors: Kohji Matsuoka, Takumi Yamaga, Akishige Murakami, Naoyuki Ueda
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Patent number: 8687262Abstract: An ion conductor includes a mixture including an electrolyte including a salt including inorganic or organic pairs of negative and positive ions, and a low-molecular liquid crystal material. Further, an impedance of the ion conductor varies in accordance with an increase of a voltage applied to the ion conductor due to an orientation response of the low-molecular liquid crystal material, the impedance being determined by an AC impedance method.Type: GrantFiled: December 12, 2011Date of Patent: April 1, 2014Assignee: Ricoh Company, Ltd.Inventors: Tohru Yashiro, Shigenobu Hirano, Koh Fujimura, Yoshihisa Naijo, Yoshinori Okada, Hiroyuki Takahashi, Akishige Murakami
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Publication number: 20140077218Abstract: A group 13 nitride crystal having a hexagonal crystal structure contains at least a nitrogen atom and at least one metal atom selected from a group consisting of B, Al, Ga, In and Tl. Dislocation density of basal plane dislocations in a cross section parallel to a c-axis is 104 cm?2 or more.Type: ApplicationFiled: September 11, 2013Publication date: March 20, 2014Applicant: RICOH COMPANY, LTD.Inventors: Masahiro Hayashi, Takashi Satoh, Chiharu Kimura, Naoya Miyoshi, Akishige Murakami, Shinsuke Miyake, Junichi Wada, Seiji Sarayama
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Publication number: 20140078569Abstract: An electro-chromic display element, and a display apparatus and a driving method using the same are provided. The electro-chromic display element includes at least a display substrate 1b; a display electrode 1 provided on the display substrate 1b; an electro-chromic layer 3 provided on the display electrode 1; an opposing substrate 2b; multiple opposing electrodes 2 which are provided on the opposing substrate 2b and which are arranged to oppose the display electrode 1; and an electrolytic layer 4 provided such that it is placed between the display electrode 1 and the multiple opposing electrodes 2. The electro-chromic display element further includes an erasing electrode 5, which is a third electrode which is placed between the display electrode 1 and the multiple opposing electrodes 2 and which is arranged such that the electro-chromic layer 3 is placed between the third electrode and the display electrode 1.Type: ApplicationFiled: May 15, 2012Publication date: March 20, 2014Applicant: RICOH COMPANY, LTD.Inventors: Hiroyuki Takahashi, Tohru Yashiro, Koh Fujimura, Akishige Murakami, Shigenobu Hirano, Yoshihisa Naijo, Yoshinori Okada, Kazuaki Tsuji, Sukchan Kim
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Patent number: 8661973Abstract: Disclosed is a screen plate for printing two-dimensionally arranged opening patterns by screen printing. The screen plate includes a dummy printing region in which a predetermined pattern is singly or plurally arranged along an edge part of one side or edge parts of two sides parallel to a printing direction of the screen plate; a full-surface printing region for performing full-surface printing, the full-surface printing region being formed into a belt shape at a position closer to a central side of the screen plate than the dummy printing region; and a printing region that is formed at a position closer to the central side than the full-surface printing region and in which the opening patterns are two-dimensionally arranged.Type: GrantFiled: July 14, 2009Date of Patent: March 4, 2014Assignee: Ricoh Company, Ltd.Inventors: Makito Nakashima, Akishige Murakami
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Publication number: 20130243680Abstract: A group 13 nitride crystal has a hexagonal crystal structure containing a nitrogen atom and at least one type of metal atom selected from the group consisting of B, Al, Ga, In, and Tl. The group 13 nitride crystal has a basal plane dislocation in a plurality of directions. Dislocation density of the basal plane dislocation is higher than dislocation density of a threading dislocation of a c-plane.Type: ApplicationFiled: March 13, 2013Publication date: September 19, 2013Applicant: RICOH COMPANY, LITD.Inventors: Masahiro HAYASHI, Seiji SARAYAMA, Takashi SATOH, Chiharu KIMURA, Naoya MIYOSHI, Akishige MURAKAMI, Junichi WADA
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Patent number: 8373170Abstract: A display apparatus is disclosed. The display apparatus includes a transistor formed on a substrate; an interlayer insulator formed on the transistor; a pixel electrode formed on the interlayer insulator; a first partition located above a contact hole which penetrates the interlayer insulator; and a second partition which intersects with the first partition, or which is located on a straight line intersecting with the first partition, and which brings a width value of the pixel electrode to a predetermined value.Type: GrantFiled: September 8, 2010Date of Patent: February 12, 2013Assignee: Ricoh Company, Ltd.Inventor: Akishige Murakami
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Publication number: 20120154892Abstract: An ion conductor includes a mixture including an electrolyte including a salt including inorganic or organic pairs of negative and positive ions, and a low-molecular liquid crystal material. Further, an impedance of the ion conductor varies in accordance with an increase of a voltage applied to the ion conductor due to an orientation response of the low-molecular liquid crystal material, the impedance being determined by an AC impedance method.Type: ApplicationFiled: December 12, 2011Publication date: June 21, 2012Applicant: RICOH COMPANY, LTD.Inventors: Tohru YASHIRO, Shigenobu Hirano, Koh Fujimura, Yoshihisa Naijo, Yoshinori Okada, Hiroyuki Takahashi, Akishige Murakami
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Publication number: 20120139824Abstract: A disclosed electrochromic display element includes a display substrate, a counter substrate facing the display substrate, display electrodes arranged between the display substrate and the counter substrate, electrochromic layers formed on the respective display electrodes, a plurality of drive elements arranged on the counter substrate at predetermined intervals, a plurality of pixel electrodes arranged on the drive elements, a charge retention layer formed over the pixel electrodes as a continuous layer, the charge retention layer being formed of a mixed film including a polymer and one of electric conductive microparticles and semiconductor microparticles, and an electrolyte layer sandwitched between the display substrate and the charge retention layer.Type: ApplicationFiled: November 30, 2011Publication date: June 7, 2012Applicant: RICOH COMPANY, LTD.Inventors: Hiroyuki TAKAHASHI, Yoshinori OKADA, Tohru YASHIRO, Akishige MURAKAMI, Shigenobu HIRANO, Yoshihisa NAIJO
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Publication number: 20120139825Abstract: An electrochromic display device includes a display substrate, a counter substrate facing the display substrate, counter electrodes arranged on the counter substrate, an electrolyte layer arranged between the display substrate and the counter electrodes, display electrodes separately arranged from one another between the display substrate and the counter electrodes, electrochromic layers to develop or reduce a color by redox reactions, the electrochromic layers being formed on the respective display electrodes arranged such that the electrochromic layers face the set of the counter electrodes, a voltage applying unit to select one of the display electrodes to connect the selected display electrode and the counter electrodes to apply a voltage between the connected display electrode and counter electrodes, a disconnecting unit to disconnect the unselected display electrodes from the counter electrodes, and an interelectrode connecting unit to connect the display electrodes.Type: ApplicationFiled: December 2, 2011Publication date: June 7, 2012Applicant: RICOH COMPANY, LTD.Inventors: Tohru YASHIRO, Shigenobu Hirano, Yoshihisa Naijo, Koh Fujimura, Akishige Murakami, Hiroyuki Takahashi, Yoshinori Okada
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Patent number: 8071432Abstract: A method of manufacturing an organic transistor active substrate is disclosed. The organic transistor active substrate includes an organic transistor in which a first electrode is formed on a substrate, a first insulating film is formed on the first electrode, a pair of second electrodes is formed on the first insulating film, and an active layer made of an organic semiconductor material is formed on the pair of second electrodes. The organic transistor is laminated with a second insulating film, and the second insulating film is laminated with a third electrode which is electrically coupled to one of the second electrodes via a through-hole provided through the second insulating film. The first electrode is formed by inkjet ejection; the first insulating film is formed by coating; the pair of second electrodes is formed by inkjet ejection; the active layer is formed by inkjet ejection; the second insulating film is formed by screen printing; and the third electrode is formed by screen printing.Type: GrantFiled: September 7, 2006Date of Patent: December 6, 2011Assignee: Ricoh Company, Ltd.Inventors: Yoshikazu Akiyama, Takumi Yamaga, Takanori Tano, Hidenori Tomono, Akishige Murakami, Hitoshi Arita, Mayuka Araumi
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Publication number: 20110275270Abstract: A display device includes a substrate; a matrix of scan lines and signal lines formed on the substrate; switching elements formed in pixel areas defined by the scan lines and the signal lines crossing each other; a first insulating film formed over the scan lines, the signal lines, and the switching elements; and display elements to be driven by the switching elements. The pixel areas are located in a display area and the first insulating film has openings above the scan lines or the signal lines in an outer area outside of the display area.Type: ApplicationFiled: February 18, 2010Publication date: November 10, 2011Inventors: Kohji Matsuoka, Takumi Yamaga, Akishige Murakami, Naoyuki Ueda
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Publication number: 20110222139Abstract: An electrochromic display apparatus is disclosed that includes a stacked body which includes a display electrode and an electrochromic layer that are stacked on each other; a film which includes through holes, and is disposed on one of the display electrode and the electrochromic layer of the stacked body; and an opposed substrate on which an opposed electrode that faces toward the display electrode is formed.Type: ApplicationFiled: March 11, 2011Publication date: September 15, 2011Applicant: RICOH COMPANY, LTD.,Inventors: Yoshihisa NAIJO, Tohru Yashiro, Shigenobu Hirano, Masahiro Yanagisawa, Masahiro Masuzawa, Akishige Murakami, Hiroyuki Takahashi, Koh Fujimura, Yoshinori Okada
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Publication number: 20110120326Abstract: Disclosed is a screen plate for printing two-dimensionally arranged opening patterns by screen printing. The screen plate includes a dummy printing region in which a predetermined pattern is singly or plurally arranged along an edge part of one side or edge parts of two sides parallel to a printing direction of the screen plate; a full-surface printing region for performing full-surface printing, the full-surface printing region being formed into a belt shape at a position closer to a central side of the screen plate than the dummy printing region; and a printing region that is formed at a position closer to the central side than the full-surface printing region and in which the opening patterns are two-dimensionally arranged.Type: ApplicationFiled: July 18, 2008Publication date: May 26, 2011Inventors: Makito Nakashima, Akishige Murakami