Patents by Inventor Hiroshi Tokuyama
Hiroshi Tokuyama 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: 9902248Abstract: A vehicle-use seal structure is provided with a seal member which is attached to a door opening part. The seal member has the following: a seal base part which is attached to a seal attachment wall by a plurality of clips; a first seal lip provided to a connection part of the seal base part; and a second lip seal provided to the connection part. The first lip seal abuts a flange part of a front side door. The second lip seal abuts an orthogonal part that is substantially orthogonal to the flange part and extends in the vehicle interior direction.Type: GrantFiled: July 2, 2014Date of Patent: February 27, 2018Assignee: HONDA MOTOR CO., LTD.Inventors: Yohei Inai, Hiroshi Tokuyama, Jun Nakamura
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Patent number: 9826669Abstract: A liquid crystal display device includes a display panel having a display surface, a light source substrate, a heat sink, and a frame having a bottom surface. The light source substrate is arranged in a rearward direction opposite to a display direction of the display panel. The light source substrate has on it a light source that illuminates the display panel. The heat sink is arranged in the rearward direction from the light source substrate. The heat sink has a base attached to the light source substrate and fins each extending in the rearward direction from the base, to dissipate heat generated in the light source. The bottom surface is arranged in the rearward direction from the base. The bottom surface has a plurality of stirs into which the fins are inserted. The frame houses the light source substrate and the heat sink.Type: GrantFiled: December 1, 2016Date of Patent: November 21, 2017Assignee: Japan Display Inc.Inventor: Hiroshi Tokuyama
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Publication number: 20170086337Abstract: A liquid crystal display device includes a display panel having a display surface, a light source substrate, a heat sink, and a frame having a bottom surface. The light source substrate is arranged in a rearward direction opposite to a display direction of the display panel. The light source substrate has on it a light source that illuminates the display panel. The heat sink is arranged in the rearward direction from the light source substrate. The heat sink has a base attached to the light source substrate and fins each extending in the rearward direction from the base, to dissipate heat generated in the light source. The bottom surface is arranged in the rearward direction from the base. The bottom surface has a plurality of stirs into which the fins are inserted. The frame houses the light source substrate and the heat sink.Type: ApplicationFiled: December 1, 2016Publication date: March 23, 2017Inventor: Hiroshi TOKUYAMA
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Patent number: 9545039Abstract: A liquid crystal display device includes a display panel having a display surface, a light source substrate, a heat sink, and a frame having a bottom surface. The light source substrate is arranged in a rearward direction opposite to a display direction of the display panel. The light source substrate has on it a light source that illuminates the display panel. The heat sink is arranged in the rearward direction from the light source substrate. The heat sink has a base attached to the light source substrate and fins each extending in the rearward direction from the base, to dissipate heat generated in the light source. The bottom surface is arranged in the rearward direction from the base. The bottom surface has a plurality of slits into which the fins are inserted. The frame houses the light source substrate and the heat sink.Type: GrantFiled: February 25, 2015Date of Patent: January 10, 2017Assignee: Japan Display Inc.Inventor: Hiroshi Tokuyama
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Patent number: 9500798Abstract: There is provided a liquid crystal display device including: a light source; a light guiding plate which takes in light generated from the light source, from a light incident surface, and emits the light from an emission surface as planar light; a plate-shaped member which has a surface perpendicular to an emission direction of the light of the light source and is disposed at least on the periphery of the light source; and a reflection member which covers from the emission surface of the light guiding plate to the plate-shaped member, the reflection member being made of a material that reflects the light.Type: GrantFiled: December 4, 2014Date of Patent: November 22, 2016Assignee: Japan Display Inc.Inventors: Hiroshi Tokuyama, Norihiro Nakamura
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Publication number: 20160144698Abstract: A vehicle-use seal structure is provided with a seal member which is attached to a door opening part. The seal member has the following: a seal base part which is attached to a seal attachment wall by a plurality of clips; a first seal lip provided to a connection part of the seal base part; and a second lip seal provided to the connection part. The first lip seal abuts a flange part of a front side door. The second lip seal abuts an orthogonal part that is substantially orthogonal to the flange part and extends in the vehicle interior direction.Type: ApplicationFiled: July 2, 2014Publication date: May 26, 2016Applicant: HONDA MOTOR CO., LTD.Inventors: Yohei Inai, Hiroshi Tokuyama, Jun Nakamura
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Patent number: 9250471Abstract: A liquid crystal display device includes a light source, a light source circuit board on which the light source is mounted, and which electrically controls the light source, a light guide plate optical system including a light guide plate having an incidence plane from which a light emitted from the light source is input, and outputting the light as a planar light, and a frame that holds the light guide plate optical system and the light source circuit board, and has a hole at a position of a light source arrangement plane which faces the incidence plane in which the light source is arranged. The light source circuit board is located at the frame so that the light source is arranged inside the hole from a rear surface side of the light source arrangement plane.Type: GrantFiled: October 7, 2013Date of Patent: February 2, 2016Assignee: JAPAN DISPLAY INC.Inventors: Hiroshi Tokuyama, Norihiro Nakamura
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Publication number: 20150257312Abstract: A liquid crystal display device includes a display panel having a display surface, a light source substrate, a heat sink, and a frame having a bottom surface. The light source substrate is arranged in a rearward direction opposite to a display direction of the display panel. The light source substrate has on it a light source that illuminates the display panel. The heat sink is arranged in the rearward direction from the light source substrate. The heat sink has a base attached to the light source substrate and fins each extending in the rearward direction from the base, to dissipate heat generated in the light source. The bottom surface is arranged in the rearward direction from the base. The bottom surface has a plurality of slits into which the fins are inserted. The frame houses the light source substrate and the heat sink.Type: ApplicationFiled: February 25, 2015Publication date: September 10, 2015Inventor: Hiroshi TOKUYAMA
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Publication number: 20150160399Abstract: There is provided a liquid crystal display device including: a light source; a light guiding plate which takes in light generated from the light source, from a light incident surface, and emits the light from an emission surface as planar light; a plate-shaped member which has a surface perpendicular to an emission direction of the light of the light source and is disposed at least on the periphery of the light source; and a reflection member which covers from the emission surface of the light guiding plate to the plate-shaped member, the reflection member being made of a material that reflects the light.Type: ApplicationFiled: December 4, 2014Publication date: June 11, 2015Inventors: Hiroshi TOKUYAMA, Norihiro NAKAMURA
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Publication number: 20140098322Abstract: A liquid crystal display device includes a light source, a light source circuit board on which the light source is mounted, and which electrically controls the light source, a light guide plate optical system including a light guide plate having an incidence plane from which a light emitted from the light source is input, and outputting the light as a planar light, and a frame that holds the light guide plate optical system and the light source circuit board, and has a hole at a position of a light source arrangement plane which faces the incidence plane in which the light source is arranged. The light source circuit board is located at the frame so that the light source is arranged inside the hole from a rear surface side of the light source arrangement plane.Type: ApplicationFiled: October 7, 2013Publication date: April 10, 2014Applicant: Japan Display Inc.Inventors: Hiroshi TOKUYAMA, Norihiro NAKAMURA
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Patent number: 8375633Abstract: A vehicular sliding door structure includes a sliding door having a closure portion configured to undergo abutting engagement with a mating portion of a vehicle body. The closure portion has an opening for allowing the entry of a striker therethrough into an internal space of the sliding door for locking engagement with a lock device. An anti-pinch sensor disposed on the closure portion has a sensor harness arranged to enter an internal space of the sliding door through the opening. A single cover member is provided on the closure portion so as to close the opening and cover a portion of the sensor harness. The cover member has a through-hole for the passage therethrough of the striker.Type: GrantFiled: October 6, 2010Date of Patent: February 19, 2013Assignee: Honda Motor Co., Ltd.Inventors: Asato Ikezumi, Masato Asakura, Hiroshi Tokuyama
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Patent number: 8269911Abstract: In a liquid crystal display device which uses light emitting diodes as a light source, the present invention provides a light source which can be effectively housed in a housing casing of a backlight even when an area of a printed circuit board is increased by taking radiation of heat from the light emitting diodes into consideration. A printed circuit board is formed by arranging light emitting diodes on a flexible substrate. The printed circuit board is formed with an area larger than an area of a light incident surface of a light guide plate, and is arranged to face the light incident surface of the light guide plate in an opposed manner. The light guide plate and the printed circuit board are housed in the inside of a housing casing, the printed circuit board is made foldable by forming slits in the printed circuit board thus enabling housing of the printed circuit board in the housing casing in a folded shape.Type: GrantFiled: October 21, 2008Date of Patent: September 18, 2012Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Saburo Watanabe, Hiroshi Tokuyama, Norihisa Fukayama
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Publication number: 20110078954Abstract: A vehicular sliding door structure includes a sliding door having a closure portion configured to undergo abutting engagement with a mating portion of a vehicle body. The closure portion has an opening for allowing the entry of a striker therethrough into an internal space of the sliding door for locking engagement with a lock device. An anti-pinch sensor disposed on the closure portion has a sensor harness arranged to enter an internal space of the sliding door through the opening. A single cover member is provided on the closure portion so as to close the opening and cover a portion of the sensor harness. The cover member has a through-hole for the passage therethrough of the striker.Type: ApplicationFiled: October 6, 2010Publication date: April 7, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Asato Ikezumi, Masato Asakura, Hiroshi Tokuyama
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Patent number: 7855761Abstract: In a liquid crystal display device which uses light emitting diodes as a light source, a backlight can efficiently house a heat radiation plate even when an area of the heat radiation plate is increased by taking the radiation of heat from the light emitting diodes into consideration. Light emitting diodes are arranged on a metal substrate to form a plate-shaped light source portion. A heat radiation effect is enhanced by adhering a heat radiation plate to the plate-shaped light source portion. The heat radiation plate to which the plate-shaped light source is adhered is constituted as a housing casing thus efficiently housing the heat radiation plate. A problem which occurs due to the use of the metal-made housing casing can be overcome by mounting a resin-made light guide plate fixing member on the housing casing.Type: GrantFiled: September 8, 2008Date of Patent: December 21, 2010Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.Inventors: Saburo Watanabe, Hiroshi Tokuyama
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Patent number: 7837375Abstract: A planar illumination device is provided that can achieve even distributions of mixed colors and luminance, downsizing and weight saving without lowering the luminous efficiency of LED chips. In addition, a liquid crystal display device using the planar illumination device as a backlight is provided. A polygonal flat plate-like light guide plate GLB is combined with a plurality of LED chips D1, D2, D3 emitting light with different colors from each other to constitute a color mixing unit DUT. A plurality of the color mixing units are arranged on printed circuit boards RFB having a reflection function to constitute a planar illumination device. The planer illumination device is installed on the back of a liquid crystal display panel, thus constituting a liquid crystal display device.Type: GrantFiled: December 19, 2006Date of Patent: November 23, 2010Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.Inventors: Saburo Watanabe, Hiroshi Tokuyama, Seiichi Nishiyama
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Publication number: 20090185099Abstract: In a liquid crystal display device which uses light emitting diodes as a light source, a backlight can efficiently house a heat radiation plate even when an area of the heat radiation plate is increased by taking the radiation of heat from the light emitting diodes into consideration. Light emitting diodes are arranged on a metal substrate to form a plate-shaped light source portion. A heat radiation effect is enhanced by adhering a heat radiation plate to the plate-shaped light source portion. The heat radiation plate to which the plate-shaped light source is adhered is constituted as a housing casing thus efficiently housing the heat radiation plate. A problem which occurs due to the use of the metal-made housing casing can be overcome by mounting a resin-made light guide plate fixing member on the housing casing.Type: ApplicationFiled: September 8, 2008Publication date: July 23, 2009Inventors: Saburo Watanabe, Hiroshi Tokuyama
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Publication number: 20090109368Abstract: In a liquid crystal display device which uses light emitting diodes as a light source, the present invention provides a light source which can be effectively housed in a housing casing of a backlight even when an area of a printed circuit board is increased by taking radiation of heat from the light emitting diodes into consideration. A printed circuit board is formed by arranging light emitting diodes on a flexible substrate. The printed circuit board is formed with an area larger than an area of a light incident surface of a light guide plate, and is arranged to face the light incident surface of the light guide plate in an opposed manner. The light guide plate and the printed circuit board are housed in the inside of a housing casing, the printed circuit board is made foldable by forming slits in the printed circuit board thus enabling housing of the printed circuit board in the housing casing in a folded shape.Type: ApplicationFiled: October 21, 2008Publication date: April 30, 2009Inventors: Saburo WATANABE, Hiroshi Tokuyama, Norihisa Fukayama
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Publication number: 20070152135Abstract: A planar illumination device is provided that can achieve even distributions of mixed colors and luminance, downsizing and weight saving without lowering the luminous efficiency of LED chips. In addition, a liquid crystal display device using the planar illumination device as a backlight is provided. A polygonal flat plate-like light guide plate GLB is combined with a plurality of LED chips D1, D2, D3 emitting light with different colors from each other to constitute a color mixing unit DUT. A plurality of the color mixing units are arranged on printed circuit boards RFB having a reflection function to constitute a planar illumination device. The planer illumination device is installed on the back of a liquid crystal display panel, thus constituting a liquid crystal display device.Type: ApplicationFiled: December 19, 2006Publication date: July 5, 2007Inventors: Saburo Watanabe, Hiroshi Tokuyama, Seiichi Nishiyama
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Publication number: 20070133222Abstract: The present invention provides a liquid crystal display device having a backlight device which can fix an LED light source at an optimum position with respect to a light guide plate and also can effectively radiate heat.Type: ApplicationFiled: December 12, 2006Publication date: June 14, 2007Inventors: Saburo Watanabe, Hiroshi Tokuyama
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Publication number: 20050195341Abstract: A display device includes an optical compensation sheet stacked body mounted on a back surface of a liquid crystal display panel, and a light guide plate mounted on a back surface of the optical compensation sheet stacked body. A first air layer is interposed between the optical compensation sheet stacked body and the light emitting surface of the light guide plate, and a plurality of diffusion plates are mounted on the light incident surface of the light guide plate. A reflection sheet is arranged to face the light guide plate, and an array of an LED chips is provided on a front surface of the reflection sheet. A second air layer is interposed between the light diffusion plates and the LED array. Light from the LED chips having a plurality of colors is mixed and effective optical path length can be prolonged, whereby the least coupling loss is obtained.Type: ApplicationFiled: March 2, 2005Publication date: September 8, 2005Inventors: Nobuyuki Koganezawa, Hiroshi Tokuyama, Akiyoshi Tobe