Patents by Inventor Hiroki Koba
Hiroki Koba 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: 9310637Abstract: A liquid crystal display 50 includes: a light source 10; a liquid crystal display panel 213; a wire-grid polarization plate 211, 214 located on at least one of a light-incident side and a light-emission side of the liquid crystal display panel 213, and including a base plate 101 and a plurality of wires 100 arranged in stripes on the base plate 1; a projection lens 23; a cooling part 25 which supplies wind to the liquid crystal display panel 213 and the polarization plate 211, 214 to cool them; and a covering wall 102 which covers end faces of the plurality of wires 100 and ends of a plurality of grooves 108 formed between the plurality of wires 100, at a windward side of the polarization plate 211, 214 in a flow direction of the wind supplied from the cooling part 25.Type: GrantFiled: August 27, 2013Date of Patent: April 12, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Hiroki Koba, Motoyuki Okuo, Kazuyuki Yoshida, Yoshihiro Furuta
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Publication number: 20140063357Abstract: A liquid crystal display 50 includes: a light source 10; a liquid crystal display panel 213; a wire-grid polarization plate 211, 214 located on at least one of a light-incident side and a light-emission side of the liquid crystal display panel 213, and including a base plate 101 and a plurality of wires 100 arranged in stripes on the base plate 1; a projection lens 23; a cooling part 25 which supplies wind to the liquid crystal display panel 213 and the polarization plate 211, 214 to cool them; and a covering wall 102 which covers end faces of the plurality of wires 100 and ends of a plurality of grooves 108 formed between the plurality of wires 100, at a windward side of the polarization plate 211, 214 in a flow direction of the wind supplied from the cooling part 25.Type: ApplicationFiled: August 27, 2013Publication date: March 6, 2014Applicant: Panasonic CorporationInventors: Hiroki KOBA, Motoyuki OKUO, Kazuyuki YOSHIDA, Yoshihiro FURUTA
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Patent number: 8172408Abstract: A lens position adjusting mechanism includes a lens, a lens attachment frame that includes a lens holding portion for holding the rim of the lens, and a holding case that sandwiches the lens attachment frame movably in a plane direction perpendicular to an optical axis of the lens. The lens attachment frame includes a shaft portion on the periphery of the lens holding portion, functioning as a fulcrum at a time when the lens attachment frame moves in the plane direction. The holding case includes a shaft supporting portion for supporting the shaft portion and frame guide grooves for sandwiching the lens attachment frame. The position of the lens is adjusted by operating a lug portion by fingers or the like with the shaft portion as a fulcrum. Then the adjusted position is fixed by injecting an adhesive into wedge spaces formed of opposing adhesion grooves.Type: GrantFiled: April 2, 2009Date of Patent: May 8, 2012Assignee: Panasonic CorporationInventors: Hiromi Fujiwara, Shigeru Matsumoto, Hiroki Koba
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Publication number: 20090251671Abstract: A lens position adjusting mechanism includes a lens, a lens attachment frame that includes a lens holding portion for holding the rim of the lens, and a holding case that sandwiches the lens attachment frame movably in a plane direction perpendicular to an optical axis of the lens. The lens attachment frame includes a shaft portion on the periphery of the lens holding portion, functioning as a fulcrum at a time when the lens attachment frame moves in the plane direction. The holding case includes a shaft supporting portion for supporting the shaft portion and frame guide grooves for sandwiching the lens attachment frame. The position of the lens is adjusted by operating a lug portion by fingers or the like with the shaft portion as a fulcrum. Then the adjusted position is fixed by injecting an adhesive into wedge spaces formed of opposing adhesion grooves.Type: ApplicationFiled: April 2, 2009Publication date: October 8, 2009Applicant: Panasonic CorporationInventors: Hiromi FUJIWARA, Shigeru Matsumoto, Hiroki Koba
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Patent number: 7506986Abstract: A light source comprises a lamp such as an ultra-high pressure mercury lamp or a metal halide lamp and its irradiated light is emitted after being parallelized by a parabolic reflector. The parabolic reflector is made by pressing metal such as stainless and its light exit side aperture is covered with a transparent plate made of glass, etc. The transparent plate prevents fragments of glass of the lamp and the like from scattering when the lamp bursts. The parabolic reflector does not have an aperture (cut-out) for ventilation, but heat radiation fins are formed on the outer surface of it.Type: GrantFiled: January 27, 2005Date of Patent: March 24, 2009Assignee: Sanyo Electric Co., Ltd.Inventors: Hiroki Koba, Shinichi Shiotsu, Motoshi Tahara, Katsumi Terada, Hideki Yamamoto
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Patent number: 7338174Abstract: Each shading plate comprises a rotating shaft and a driving shaft arranged vertically. First divided shading plate is loosely fitted to and supported by (not adhere to) the rotating shaft and rotates around the shaft. Second divided shading plates are fixed to the rotating shafts and rotate by rotating movement of the shafts. A driving shaft is connected longitudinally to (not adhere to) an edge of the first divided shading plate and supply power to rotate the first divided shading plates. Recesses are formed at the center of upper short side and at the center of lower short side of the first divided shading plate and the first divided shading plate and the second divided shading plates which form one and the same shading plate are so constructed that their short sides are overlapped each other.Type: GrantFiled: February 17, 2005Date of Patent: March 4, 2008Assignees: Sanyo Electric Co., Ltd., THK Co., Ltd.Inventors: Hiroki Koba, Kaoru Hoshide, Minoru Kouchi
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Patent number: 7207679Abstract: A video signal processing circuit inputs a video signal to perform processing such as frequency conversion as well as processing for generating data representing the APL (Average Picture Level) of a frame video for each frame period. A microcomputer functions as a dimmer arithmetic block to perform processing for generating dimmer data upon receipt of APL data, and functions as a lamp driver control block to perform processing for sending out a dimmer command to a lamp driver. The lamp driver receives the dimmer command, to control an amount of light emitted from a light source (a lamp).Type: GrantFiled: June 29, 2004Date of Patent: April 24, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Totani, Katsumi Terada, Hiroki Koba, Kazunobu Oketani
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Patent number: 7195373Abstract: Each light path changing member forms a first light flux by reflecting a half of light flux emitted from a particular area (central area or peripheral area) of light source in one direction using a polarizing beam splitter, and forms a second light flux by reflecting the other half of light flux, which has passed through the beam splitter, in the afore-mentioned direction using the first mirror. Then, each light path changing member transmits a half of a light flux emitted from the other light source and guided by the second mirror in the same direction as that in which the first light flux has been guided using the polarizing beam splitter, and superposes the light flux on the aforementioned first light flux, and reflects the other half of light flux, which has been reflected by the beam splitter, in the aforementioned direction using the first mirror, and superposes the light flux on the second light flux.Type: GrantFiled: November 30, 2004Date of Patent: March 27, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Koji Ishii, Hiroki Koba
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Patent number: 7164546Abstract: A lens mounting plate to which a projection lens unit is fixed is brought into contact with a sliding base. The lens mounting plate is pressed against the sliding base by the urging of a coiled spring. The pressing force is set such that the position of the projection lens unit can be held and shifted. A cover is provided with a pipe-shaped projection so as to surround the projection lens unit with a clearance corresponding to the shifting width of the projection lens unit between the pipe-shaped projection and the projection lens unit. A user shifts the position of the projection lens unit with his or her fingers laid on the pipe-shaped projection and the projection lens unit.Type: GrantFiled: April 22, 2003Date of Patent: January 16, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Yoshiaki Miyashita, Hiroki Koba
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Patent number: 7055965Abstract: A shutter device comprises a plurality of shutters. Each of the shutters is provided at a position in the vicinity of a fly's eye lens positioned on the side of a polarization conversion system (one of fly's eye lenses in an integrator lens) and not preventing the passage of effective illuminating light. Each of the shutters is constructed as a first shutter or a second shutter.Type: GrantFiled: June 29, 2004Date of Patent: June 6, 2006Assignee: Sanyo Electric Co., Ltd.Inventor: Hiroki Koba
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Publication number: 20050231962Abstract: A light source comprises a lamp such as an ultra-high pressure mercury lamp or a metal halide lamp and its irradiated light is emitted after being parallelized by a parabolic reflector. The parabolic reflector is made by pressing metal such as stainless and its light exit side aperture is covered with a transparent plate made of glass, etc. The transparent plate prevents fragments of glass of the lamp and the like from scattering when the lamp bursts. The parabolic reflector does not have an aperture (cut-out) for ventilation, but heat radiation fins are formed on the outer surface of it.Type: ApplicationFiled: January 27, 2005Publication date: October 20, 2005Applicant: SANYO ELECTRIC CO., LTD.Inventors: Hiroki Koba, Shinichi Shiotsu, Motoshi Tahara, Katsumi Terada, Hideki Yamamoto
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Publication number: 20050185151Abstract: Each shading plate comprises a rotating shaft and a driving shaft arranged vertically. First divided shading plate is loosely fitted to and supported by (not adhere to) the rotating shaft and rotates around the shaft. Second divided shading plates are fixed to the rotating shafts and rotate by rotating movement of the shafts. A driving shaft is connected longitudinally to (not adhere to) an edge of the first divided shading plate and supply power to rotate the first divided shading plates. Recesses are formed at the center of upper short side and at the center of lower short side of the first divided shading plate and the first divided shading plate and the second divided shading plates which form one and the same shading plate are so constructed that their short sides are overlapped each other.Type: ApplicationFiled: February 17, 2005Publication date: August 25, 2005Applicants: SANYO ELECTRIC CO., LTD., THK CO., LTD.Inventors: Hiroki Koba, Kaoru Hoshide, Minoru Kouchi
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Publication number: 20050117337Abstract: Each light path changing member forms a first light flux by reflecting a half of light flux emitted from a particular area (central area or peripheral area) of light source in one direction using a polarizing beam splitter, and forms a second light flux by reflecting the other half of light flux, which has passed through the beamsplitter, in the afore-mentioned direction using the first mirror. Then, each light path changing member transmits a half of a light flux emitted from the other light source and guided by the second mirror in the same direction as that in which the first light flux has been guided using the polarizing beam splitter, and superposes the light flux on the aforementioned first light flux, and reflects the other half of light flux, which has been reflected by the beam splitter, in the aforementioned direction using the first mirror, and superposes the light flux on the second light flux.Type: ApplicationFiled: November 30, 2004Publication date: June 2, 2005Applicant: SANYO ELECTRIC CO., LTD.Inventors: Koji Ishii, Hiroki Koba
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Publication number: 20050001938Abstract: A shutter device comprises a plurality of shutters. Each of the shutters is provided at a position in the vicinity of a fly's eye lens positioned on the side of a polarization conversion system (one of fly's eye lenses in an integrator lens) and not preventing the passage of effective illuminating light. Each of the shutters is constructed as a first shutter or a second shutter.Type: ApplicationFiled: June 29, 2004Publication date: January 6, 2005Applicant: SANYO ELECTRIC CO., LTD.Inventor: Hiroki Koba
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Publication number: 20040263801Abstract: A video signal processing circuit inputs a video signal to perform processing such as frequency conversion as well as processing for generating data representing the APL (Average Picture Level) of a frame video for each frame period. A microcomputer functions as a dimmer arithmetic block to perform processing for generating dimmer data upon receipt of APL data, and functions as a lamp driver control block to perform processing for sending out a dimmer command to a lamp driver. The lamp driver receives the dimmer command, to control an amount of light emitted from a light source (a lamp).Type: ApplicationFiled: June 29, 2004Publication date: December 30, 2004Applicant: SANYO ELECTRIC CO., LTD.Inventors: Takahiro Totani, Katsumi Terada, Hiroki Koba, Kazunobu Oketani
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Patent number: 6829108Abstract: The object of the present invention is to further improve a lens barrel moving mechanism of a liquid crystal projector and to provide a lens moving mechanism which has simple structure and is capable of achieving the smooth and high precision movement of a lens barrel, and a liquid crystal projector employing the lens moving mechanism. The present invention provides a lens moving mechanism for moving a lens retaining member 20, which retains a lens barrel 15 provided therein with a projection lens for projecting light with image information, in the directions of Z axis and X axis. The lens moving mechanism comprises first and second guiding mechanisms 23, 23, 24, 24 including a track member, a movable member, and a plurality of rolling members arranged between a rolling member running surface of the track member and a rolling member running surface of the movable member, whereby the lens barrel 15 is guided by the first and the second guiding mechanisms 23, 23, 24, 24 in the directions of Z axis and X axis.Type: GrantFiled: August 8, 2003Date of Patent: December 7, 2004Assignees: Sanyo Electric Co., Ltd., THK Co., Ltd.Inventors: Hiroki Koba, Susumu Takehara, Kaoru Hoshide, Minoru Kouchi, Kentaro Eto
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Patent number: 6803971Abstract: Two of four light sources have canceling characteristics with respect to color nonuniformity, and the other two light sources have canceling characteristics with respect to color nonuniformity. A light emission stop detector detects that each of the light sources stops emitting light by blowing its value for example, and feeds, if a certain light source stops emitting light, information indicating that the light source stops emitting light to an energization controller. The energization controller stops, when it receives the information indicating that a certain light source stops emitting light, the energization to a light source paired with the certain light source and puts out the light source.Type: GrantFiled: September 17, 2001Date of Patent: October 12, 2004Assignee: Sanyo Electric Co., Ltd.Inventors: Hideki Yamamoto, Yoshihiro Sasaki, Hiroki Koba
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Publication number: 20040080836Abstract: A lens mounting plate to which a projection lens unit is fixed is brought into contact with a sliding base. The lens mounting plate is pressed against the sliding base by the urging of a coiled spring. The pressing force is set such that the position of the projection lens unit can be held and shifted. A cover is provided with a pipe-shaped projection so as to surround the projection lens unit with a clearance corresponding to the shifting width of the projection lens unit between the pipe-shaped projection and the projection lens unit. A user shifts the position of the projection lens unit with his or her fingers laid on the pipe-shaped projection and the projection lens unit.Type: ApplicationFiled: April 22, 2003Publication date: April 29, 2004Inventors: Yoshiaki Miyashita, Hiroki Koba
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Publication number: 20040070851Abstract: The object of the present invention is to further improve a lens barrel moving mechanism of a liquid crystal projector and to provide a lens moving mechanism which has simple structure and is capable of achieving the smooth and high precision movement of a lens barrel, and a liquid crystal projector employing the lens moving mechanism.Type: ApplicationFiled: August 8, 2003Publication date: April 15, 2004Inventors: Hiroki Koba, Susumu Takehara, Kaoru Hoshide, Minoru Kouchi, Kentaro Eto
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Patent number: RE42270Abstract: A lens mounting plate to which a projection lens unit is fixed is brought into contact with a sliding base. The lens mounting plate is pressed against the sliding base by the urging of a coiled spring. The pressing force is set such that the position of the projection lens unit can be held and shifted. A cover is provided with a pipe-shaped projection so as to surround the projection lens unit with a clearance corresponding to the shifting width of the projection lens unit between the pipe-shaped projection and the projection lens unit. A user shifts the position of the projection lens unit with his or her fingers laid on the pipe-shaped projection and the projection lens unit.Type: GrantFiled: January 15, 2009Date of Patent: April 5, 2011Assignee: Sanyo Electronic Co., Ltd.Inventors: Yoshiaki Miyashita, Hiroki Koba