Patents by Inventor Toshiyuki Fujita
Toshiyuki Fujita 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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Publication number: 20150138773Abstract: A lighting device includes a substrate and a planar light source portion including a plurality of LED chips arrayed on the substrate. The planar light source portion faces an illumination space (space to be illuminated) by a predetermined opening area. The plurality of LED chips are arrayed on the substrate such that the mounting density with respect to the opening area is not less than 3/cm2, and accordingly, a planar light source is formed.Type: ApplicationFiled: December 12, 2014Publication date: May 21, 2015Applicant: ROHM CO., LTD.Inventors: Toshiyuki FUJITA, Toshio WATANABE, Yusaku KAWABATA
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Patent number: 8962226Abstract: An organic photoreceptor, comprises: a conductive support; a photosensitive layer provided on the conductive support; and a protective layer provided on the photosensitive layer, wherein the protective layer contains alumina particles which contain 2 to 50 ppm of phosphorus atoms and is subjected to a surface treatment with a compound A having a reactive functional group and a curable compound B, and the protective layer is a cured layer including a cured product material formed by at least the compound A on the surfaces of the alumina particles and the curable compound B.Type: GrantFiled: August 10, 2010Date of Patent: February 24, 2015Assignee: Konica Minolta, Inc.Inventors: Seisuke Maeda, Takeshi Ishida, Masahiko Kurachi, Toshiyuki Fujita, Seijiro Takahashi
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Patent number: 8962363Abstract: Provided is a novel method for forming a groove composed of two smooth inclined surfaces on a surface of a flat plate formed of a nitride semiconductor crystal having an A, C, M-axes. In the present invention, a disk-shaped dicing blade is moved along a direction of the A-axis to form first and second inclined surfaces on the surface of the flat plate. The following mathematical formulae (I)-(III) are satisfied: 45 degrees??b?a?60 degrees (I) 45 degrees??b+a?60 degrees (II), 0 degrees?|a|?7.5 degrees, where angle ?b represents an angle formed between a surface of the edge and a radial direction of the dicing blade in a cross-sectional view which includes the M-axis and the C-axis. The angle a represents an angle formed between the principal surface and the M-axis.Type: GrantFiled: June 6, 2014Date of Patent: February 24, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Akira Inoue, Toshiyuki Fujita, Toshiya Yokogawa
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Patent number: 8915610Abstract: A lighting device includes a substrate and a planar light source portion including a plurality of LED chips arrayed on the substrate. The planar light source portion faces an illumination space (space to be illuminated) by a predetermined opening area. The plurality of LED chips are arrayed on the substrate such that the mounting density with respect to the opening area is not less than 3/cm2, and accordingly, a planar light source is formed.Type: GrantFiled: August 10, 2009Date of Patent: December 23, 2014Assignee: Rohm Co., Ltd.Inventors: Toshiyuki Fujita, Toshio Watanabe, Yusaku Kawabata
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Publication number: 20140370685Abstract: Provided is a novel method for forming a groove composed of two smooth inclined surfaces on a surface of a flat plate formed of a nitride semiconductor crystal having an A, C, M-axes. In the present invention, a disk-shaped dicing blade is moved along a direction of the A-axis to form first and second inclined surfaces on the surface of the flat plate. The following mathematical formulae (I)-(III) are satisfied: 45 degrees??b?a?60 degrees (I) 45 degrees??b+a?60 degrees (II), 0 degrees?|a|?7.5 degrees, where angle ?b represents an angle formed between a surface of the edge and a radial direction of the dicing blade in a cross-sectional view which includes the M-axis and the C-axis. The angle a represents an angle formed between the principal surface and the M-axis.Type: ApplicationFiled: June 6, 2014Publication date: December 18, 2014Inventors: AKIRA INOUE, TOSHIYUKI FUJITA, TOSHIYA YOKOGAWA
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Publication number: 20140353699Abstract: Provided is a nitride semiconductor light-emitting diode having a higher light extraction efficiency and a higher polarization degree. A nitride semiconductor light-emitting diode according to the present invention comprises an active layer generating a polarized light, a first side surface, a second side surface, a third side surface, and a fourth side surface. The first and second side surfaces consist only of a plane including the Z-axis and the Y-axis. The third and fourth side surfaces are perpendicular to the first and second side surfaces and include the X-axis. The third and fourth side surfaces include an inclined surface.Type: ApplicationFiled: June 2, 2014Publication date: December 4, 2014Applicant: Panasonic CorporationInventors: TOSHIYUKI FUJITA, TOSHIYA YOKOGAWA, AKIRA INOUE
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Patent number: 8889325Abstract: The invention provides a means for improving the abrasion resistance and the scratch resistance of a protection layer by increasing the surface hardness of the protection layer of an organic photoreceptor. The invention is an organic photoreceptor constituted by laminating on an electroconductive substrate, a photosensitive layer and a protection layer successively, wherein the protection layer comprises a charge transport substance represented by the following general formula (1), a resin component obtained by curing a curable compound and tin oxide treated with a surface preparation agent having a reactive organic group, and a silica particle: in the general formula (1), R1 and R2 are each independently hydrogen atoms or methyl groups, and R3 is a straight-chain or branched alkyl group having 1 to 5 carbon atoms.Type: GrantFiled: May 2, 2013Date of Patent: November 18, 2014Assignee: Konica Minolta, Inc.Inventors: Mari Konishi, Keiichi Inagaki, Toshiyuki Fujita
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Publication number: 20140313733Abstract: There are provided a light source device and a display device which do not generate a wrinkle on an optical sheet even if the optical sheet is held on an LED substrate. A reflection sheet is disposed between each of head portions possessed by a rivet, a positioning rivet and a support rivet and one surface of an LED substrate where an LED is mounted, and a gap in a direction of a sheet thickness is provided between the head portion of each of the rivets and the reflection sheet. In the case in which a sudden thermal change is caused, therefore, the reflection sheet expands or contracts between the head portion of each of the rivets and the reflection sheet so that the wrinkle can be prevented from being generated over the reflection sheet.Type: ApplicationFiled: June 30, 2014Publication date: October 23, 2014Inventors: Hideto TAKEUCHI, Toshiyuki FUJITA, Tatsuo SUGAHARA, Yuuki KAWAMURA, Mamoru YAHATA, Hiroshi TAKAHASHI, Keita ITO, Kenzo TOSHIYUKI, Kenichiro ITO, Kazuki NAKAMICHI, Tomoo SASAKI, Kenta MORIBE
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Patent number: 8807771Abstract: There are provided a light source device and a display device which do not generate a wrinkle on an optical sheet even if the optical sheet is held on an LED substrate. A reflection sheet is disposed between each of head portions possessed by a rivet, a positioning rivet and a support rivet and one surface of an LED substrate where an LED is mounted, and a gap in a direction of a sheet thickness is provided between the head portion of each of the rivets and the reflection sheet. In the case in which a sudden thermal change is caused, therefore, the reflection sheet expands or contracts between the head portion of each of the rivets and the reflection sheet so that the wrinkle can be prevented from being generated over the reflection sheet.Type: GrantFiled: April 16, 2010Date of Patent: August 19, 2014Assignee: Sharp Kabushiki KaishaInventors: Hideto Takeuchi, Toshiyuki Fujita, Tatsuo Sugahara, Yuuki Kawamura, Mamoru Yahata, Hiroshi Takahashi, Keita Ito, Kenzo Toshiyuki, Kenichiro Ito, Kazuki Nakamichi, Tomoo Sasaki, Kenta Moribe
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Publication number: 20140227621Abstract: A fuel cell stack formed by stacking two or more fuel cell layers each constituted of one or more unit cell and a fuel cell system including the same are provided. Any two fuel cell layers adjacent to each other each have one or more gap region. At least a part of the gap region in one fuel cell layer of any two fuel cell layers adjacent to each other is in contact with a unit cell constituting the other fuel cell layer. The gap region in one fuel cell layer and the gap region in the other fuel cell layer communicate with each other. The fuel cell stack is excellent in fuel or oxidizing agent supply performance and it realizes high power density.Type: ApplicationFiled: February 28, 2014Publication date: August 14, 2014Applicant: Sharp Kabushiki KaishaInventors: Toshiyuki FUJITA, Hironori KAMBARA, Masashi MURAOKA, Tomohisa YOSHIE
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Publication number: 20140217423Abstract: A semiconductor light-emitting device made of a nitride-based semiconductor includes a semiconductor stacked structure having a nonpolar plane or a semipolar plane as a principal plane, and including an active layer for emitting polarized light. The semiconductor light-emitting device includes a striped structure which is provided in a position intersecting an exit path of the polarized light and includes a plurality of recesses. An angle formed between the extension direction of the recesses and the polarization direction of the polarized light is from 0° to 45°. The recesses have a minute uneven structure (texture) at at least part of a surface of each recess, the minute uneven structure being shallower than the depth of each recess.Type: ApplicationFiled: April 3, 2014Publication date: August 7, 2014Applicant: Panasonic CorporationInventors: Toshiyuki FUJITA, Akira INOUE, Toshiya YOKOGAWA
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Patent number: 8771910Abstract: Disclosed is an electrophotographic photoreceptor including a conductive supporting body, a photosensitive layer and a protective layer. In the electrophotographic photoreceptor, at least the photosensitive layer and the protective layer are sequentially layered on the conductive supporting body, and the protective layer includes P-type semiconductor particles.Type: GrantFiled: December 14, 2012Date of Patent: July 8, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Toshiyuki Fujita, Hirofumi Hayata
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Patent number: 8741500Abstract: A fuel cell stack formed by stacking two or more fuel cell layers each constituted of one or more unit cell and a fuel cell system including the same are provided. Any two fuel cell layers adjacent to each other each have one or more gap region. At least a part of the gap region in one fuel cell layer of any two fuel cell layers adjacent to each other is in contact with a unit cell constituting the other fuel cell layer. The gap region in one fuel cell layer and the gap region in the other fuel cell layer communicate with each other. The fuel cell stack is excellent in fuel or oxidizing agent supply performance and it realizes high power density.Type: GrantFiled: July 30, 2008Date of Patent: June 3, 2014Assignee: Sharp Kabushiki KaishaInventors: Toshiyuki Fujita, Hironori Kambara, Masashi Muraoka, Tomohisa Yoshie
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Publication number: 20140113224Abstract: A method for forming an electrophotographic image is provided which exhibits high toner transfer efficiency without image defects caused by scratches on a photoreceptor and image blurring under high-humidity conditions. The method for forming an electrophotographic image uses an organic photoreceptor and includes a charging step, exposing step, developing step, transferring step and cleaning step. The organic photoreceptor has a photosensitive layer and a protective layer on an electrically conductive support. The protective layer contains a resin prepared by polymerization of a polymerizable compound, a particulate metal oxide, and a compound represented by a formula (1). The developing step uses a toner containing a silica particle having a number-average primary particle diameter of 70 to 150 nm. The formula (1) is: where R1, R2, R3, and R4 may be same or different and each represents a hydrogen atom or an alkyl group.Type: ApplicationFiled: September 17, 2013Publication date: April 24, 2014Applicant: Konica Minolta , Inc.Inventors: Toshiyuki FUJITA, Mari KONISHI
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Publication number: 20140098520Abstract: A light source device includes a circuit board having a light-emitting element mounted on a one surface; a support body positioned on the other surface side of the circuit board for supporting the circuit board; a rivet having a head portion, which is positioned on a side of the one surface of the circuit board and cannot be inserted into a first through hole provided on the circuit board and the support body, and a shaft portion having a tip side stopped and held on the support body in a penetration via the first through hole; and a reflection sheet arranged on the one surface of the circuit board for reflecting light. The light source device provides a second through hole having a diameter larger or smaller than the diameter of the head portion at the position corresponding to the head portion on the reflection sheet.Type: ApplicationFiled: December 5, 2013Publication date: April 10, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Hideto TAKEUCHI, Hiroshi TAKAHASHI, Tatsuo SUGAHARA, Keita ITO, Toshiyuki FUJITA, Yuuki KAWAMURA, Kenzo TOSHIYUKI, Kenichiro ITO, Kazuki NAKAMICHI, Tomoo SASAKI, Kenta MORIBE, Mamoru YAHATA
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Patent number: 8679711Abstract: An electrophotographic photoreceptor is disclosed, comprising, on an electrically conductive substrate, a photosensitive layer and a surface layer provided sequentially in that order, in which the surface layer is a layer formed by polymerizing a polymerizable compound (I) containing seven to ten functional groups and exhibiting a reactive group equivalent of not more than 140 and not less than 100.Type: GrantFiled: June 17, 2011Date of Patent: March 25, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Morio Osada, Takeshi Ishida, Toshiyuki Fujita, Seisuke Maeda
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Publication number: 20140042456Abstract: A nitride semiconductor light emitting chip includes: a conductive substrate including a nitride semiconductor layer; an n-type nitride semiconductor layer, an active layer, and a p-type nitride semiconductor layer sequentially formed on a principal surface of the nitride semiconductor layer; and an n-side electrode formed in contact with the conductive substrate. A recess is formed in a back surface of the conductive substrate opposite to the principal surface. The n-side electrode is in contact with at least part of a surface of the recess. A depth D1 is not less than 25% of a thickness T, where T represents a thickness of the conductive substrate, and D1 represents a depth of the recess.Type: ApplicationFiled: October 16, 2013Publication date: February 13, 2014Applicant: Panasonic CorporationInventors: Akira INOUE, Toshiyuki FUJITA, Masaki FUJIKANE, Toshiya YOKOGAWA
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Patent number: 8632200Abstract: A light source device which can prevent a stress from being generated on each of circuit boards when connected through a connector and fixed to a support body through a fixture, is provided. There are provided a plurality of circuit boards 2 having a light-emitting element 1 mounted on a one surface 2a and disposed apart from each other with a planar direction aligned, a support body 6 positioned on the other surface side of the circuit boards 2 for supporting the circuit boards, and a connector 5 for electrically connecting the adjacent circuit boards 2 to each other. Inserting holes 2c and 2d for inserting a fixture 8 for fixing the circuit boards 2 to the support body 6 are formed on the circuit boards 2 apart from each other, and a dimension of the inserting hole 2c is smaller than that of the other inserting hole 2d.Type: GrantFiled: April 16, 2010Date of Patent: January 21, 2014Assignee: Sharp Kabushiki KaishaInventors: Hideto Takeuchi, Toshiyuki Fujita, Tatsuo Sugahara, Yuuki Kawamura, Mamoru Yahata, Hiroshi Takahashi, Keita Ito, Kenzo Toshiyuki, Kenichiro Ito, Kazuki Nakamichi, Tomoo Sasaki, Kenta Moribe
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Publication number: 20130316277Abstract: The invention provides a means for improving the abrasion resistance and the scratch resistance of a protection layer by increasing the surface hardness of the protection layer of an organic photoreceptor. The invention is an organic photoreceptor constituted by laminating on an electroconductive substrate, a photosensitive layer and a protection layer successively, wherein the protection layer comprises a charge transport substance represented by the following general formula (1), a resin component obtained by curing a curable compound and tin oxide treated with a surface preparation agent having a reactive organic group, and a silica particle; in the general formula (1), R1 and R2 are each independently hydrogen atoms or methyl groups, and R3 is a straight-chain or branched alkyl group having 1 to 5 carbon atoms.Type: ApplicationFiled: May 2, 2013Publication date: November 28, 2013Applicant: KONICA MINOLTA, INC.Inventors: Mari KONISHI, Keiichi INAGAKI, Toshiyuki FUJITA
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Publication number: 20130279173Abstract: It is to provide a reflection sheet, light source device and display device, not only for uniforming the luminance of light emitted from a light source, but also for utilizing a single sheet material to form the reflection sheet having a frame portion that continues to all rims of a flat portion. The reflection sheet is provided with a flat portion that is formed in a substantially square shape, and a frame portion that is folded at a first fold formed on a rim of the flat portion. It is formed in a case shape. It is provided with three second folds divergent from a corner of the flat portion to a rim of a corner on the frame portion, between each corner of the flat portion and the rim of the corner on the frame portion. No gap and step are generated on the corner.Type: ApplicationFiled: June 12, 2013Publication date: October 24, 2013Inventors: Hideto TAKEUCHI, Toshiyuki FUJITA, Tatsuo SUGAHARA, Yuuki KAWAMURA, Mamoru YAHATA, Hiroshi TAKAHASHI, Keita ITO, Kenzo TOSHIYUKI, Kenichiro ITO, Kazuki NAKAMICHI, Tomoo SASAKI, Kenta MORIBE