Patents by Inventor Tomotaka HORIKAWA
Tomotaka HORIKAWA 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: 11152541Abstract: A substrate according to an embodiment includes a plurality of land portions that are bonded to a plurality of terminals of a light source via solder, respectively, the light source having the terminals on a surface other than a light-emitting surface, each of the land portions having a cutout provided by cutting in accordance with a shape of the corresponding terminal.Type: GrantFiled: November 13, 2018Date of Patent: October 19, 2021Assignee: MINEBEA MITSUMI INC.Inventors: Tomotaka Horikawa, Makoto Furuta
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Publication number: 20190189847Abstract: A substrate according to an embodiment includes a plurality of land portions that are bonded to a plurality of terminals of a light source via solder, respectively, the light source having the terminals on a surface other than a light-emitting surface, each of the land portions having a cutout provided by cutting in accordance with a shape of the corresponding terminal.Type: ApplicationFiled: November 13, 2018Publication date: June 20, 2019Inventors: Tomotaka HORIKAWA, Makoto FURUTA
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Patent number: 10028382Abstract: A planar lighting device includes a light guide plate, a plurality of light sources arranged in a line shape along a longitudinal direction of a side end face of the light guide plate, and a mounting substrate, on which the light sources are mounted. The mounting substrate has a base material, a conduction pattern formed on the base material, and a cover member arranged on the conduction pattern. The conduction pattern includes pairs of lands corresponding to a plurality of electrode terminals of each light source and to which the pair of electrode terminals is respectively connected, and first and second extension parts that are respectively connected to the pair of lands, extend from a first end portion of the lands, which faces the land of the adjacent light source, extend toward opposite sides of the light guide plate and to extend under the cover member.Type: GrantFiled: June 7, 2016Date of Patent: July 17, 2018Assignee: Minebea Co., Ltd.Inventors: Tomotaka Horikawa, Makoto Furuta, Hidekazu Kasai, Namiko Suzuki
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Publication number: 20160286646Abstract: A planar lighting device includes a light guide plate, a plurality of light sources arranged in a line shape along a longitudinal direction of a side end face of the light guide plate, and a mounting substrate, on which the light sources are mounted. The mounting substrate has a base material, a conduction pattern formed on the base material, and a cover member arranged on the conduction pattern. The conduction pattern includes pairs of lands corresponding to a plurality of electrode terminals of each light source and to which the pair of electrode terminals is respectively connected, and first and second extension parts that are respectively connected to the pair of lands, extend from a first end portion of the lands, which faces the land of the adjacent light source, extend toward opposite sides of the light guide plate and to extend under the cover member.Type: ApplicationFiled: June 7, 2016Publication date: September 29, 2016Inventors: Tomotaka HORIKAWA, Makoto FURUTA, Hidekazu KASAI, Namiko SUZUKI
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Patent number: 9383086Abstract: A planar lighting device comprises: a mounting substrate having a conduction pattern having an extension part formed on a base material, and a cover member is arranged on the conduction pattern, wherein the cover member has an opening that exposes together the two lands of the two adjacent light sources, and wherein the extension parts comprise: a first extension part formed to extend from a first end portion of the lands toward the light guide plate and to extend under the cover member; a second extension part formed to extend from a second end portion, toward the light guide plate and the other land of the pair of the lands and to extend under the cover member; and a third extension part formed to extend from the first end portion, toward an opposite side to the light guide plate and to extend under the cover member.Type: GrantFiled: January 11, 2013Date of Patent: July 5, 2016Assignee: Minebea Co., Ltd.Inventors: Tomotaka Horikawa, Makoto Furuta, Hidekazu Kasai, Namiko Suzuki
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Patent number: 9158056Abstract: A spread illuminating apparatus includes a plurality of point light sources; a printed circuit board on which the plurality of point light sources is each mounted; and a light guide plate with a light input surface facing the point light source and a light output portion that exits plane light emitted from the point light source and introduced through the light input surface, wherein the light guide plate includes an inclination portion between the light input surface and the light output portion, the inclination portion having a thickness gradually decreasing toward the light output portion side, an inclined surface of the inclination portion includes a pedestal for disposing the printed circuit board in an area except the front of the point light source, and a light-blocking member is disposed between the neighboring pedestals.Type: GrantFiled: July 18, 2013Date of Patent: October 13, 2015Assignee: MINEBEA CO., LTD.Inventors: Shohei Takada, Tomotaka Horikawa
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Patent number: 8992064Abstract: A planar illumination device includes a light source unit, including a substantially planar emitting surface, configured to emit light to illuminate a substantially planar object, and a frame, formed in a frame shape enclosing the light source unit, disposed on an outer circumferential side of the light source unit, configured to hold the light source unit. The frame includes a reflecting part configured to reflect the light, and an absorbing part, formed integral with at least a part of an outer circumferential surface of the reflecting part, configured to absorb the light. The reflecting part and the absorbing part include joint interface therebetween that is inclined to a direction vertical to the emitting surface.Type: GrantFiled: March 30, 2012Date of Patent: March 31, 2015Assignee: Minebea Co., Ltd.Inventors: Tomotaka Horikawa, Masahito Totsuka, Shinji Kawai, Satoshi Kawashima
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Patent number: 8894264Abstract: A spread illuminating apparatus includes: a light guide plate with an emitting surface, a plurality of optical sheets laminated on the emitting surface, a light-blocking member that defines an effective area of the emitting surface, a light source, and a frame for accommodating the above constituents. The plurality of optical sheets are formed such that a position of an edge of each optical sheet on the incident light surface side of the light guide plate is spaced farther apart from the incident light surface of the light guide plate as moving toward a top layer of the optical sheets counted from the emitting surface, and the light-blocking member is fixed to each optical sheet and extends from the incident light surface side of the light guide plate so as to cover a vicinity of the edges of the plurality of optical sheets.Type: GrantFiled: February 19, 2013Date of Patent: November 25, 2014Assignee: Minebea Co., Ltd.Inventors: Shohei Takada, Tomotaka Horikawa
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Patent number: 8801262Abstract: A spread illuminating apparatus includes: a light guide plate having protrusions on side surfaces of the light guide plate, a housing frame having recesses in which the protrusions of the light guide plate are introduced, a reflecting sheet arranged on a bottom surface side opposing an emitting surface of the light guide plate, and a fixation device for fixing the reflecting sheet to a bottom surface of the housing frame. The recesses of the housing frame include a first recess which is formed to be opened at a bottom surface side and is at least partially covered by the fixation device, and each of the protrusions to be arranged at the first recess has an opposing surface that opposes the fixation device, and the opposing surface is provided with clearance relative to the fixation device.Type: GrantFiled: June 12, 2013Date of Patent: August 12, 2014Assignee: Minebea Co., Ltd.Inventors: Shohei Takada, Tomotaka Horikawa
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Publication number: 20140036541Abstract: A spread illuminating apparatus includes a plurality of point light sources; a printed circuit board on which the plurality of point light sources is each mounted; and a light guide plate with a light input surface facing the point light source and a light output portion that exits plane light emitted from the point light source and introduced through the light input surface, wherein the light guide plate includes an inclination portion between the light input surface and the light output portion, the inclination portion having a thickness gradually decreasing toward the light output portion side, an inclined surface of the inclination portion includes a pedestal for disposing the printed circuit board in an area except the front of the point light source, and a light-blocking member is disposed between the neighboring pedestals.Type: ApplicationFiled: July 18, 2013Publication date: February 6, 2014Inventors: Shohei TAKADA, Tomotaka HORIKAWA
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Publication number: 20140003092Abstract: A spread illuminating apparatus includes: a light guide plate having protrusions on side surfaces of the light guide plate, a housing frame having recesses in which the protrusions of the light guide plate are introduced, a reflecting sheet arranged on a bottom surface side opposing an emitting surface of the light guide plate, and a fixation device for fixing the reflecting sheet to a bottom surface of the housing frame. The recesses of the housing frame include a first recess which is formed to be opened at a bottom surface side and is at least partially covered by the fixation device, and each of the protrusions to be arranged at the first recess has an opposing surface that opposes the fixation device, and the opposing surface is provided with clearance relative to the fixation device.Type: ApplicationFiled: June 12, 2013Publication date: January 2, 2014Inventors: Shohei TAKADA, Tomotaka HORIKAWA
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Publication number: 20130135898Abstract: A planar illumination device includes a light source unit, including a substantially planar emitting surface, configured to emit light to illuminate a substantially planar object, and a frame, formed in a frame shape enclosing the light source unit, disposed on an outer circumferential side of the light source unit, configured to hold the light source unit. The frame includes a reflecting part configured to reflect the light, and an absorbing part, formed integral with at least a part of an outer circumferential surface of the reflecting part, configured to absorb the light. The reflecting part and the absorbing part include joint interface therebetween that is inclined to a direction vertical to the emitting surface.Type: ApplicationFiled: March 30, 2012Publication date: May 30, 2013Applicant: MINEBEA CO., LTD.Inventors: Tomotaka HORIKAWA, Masahito TOTSUKA, Shinji KAWAI, Satoshi KAWASHIMA