Patents by Inventor Takehiko Tajima
Takehiko Tajima 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: 9644811Abstract: A vehicular headlamp has a projection lens having an optical axis extending in a front-back direction, a light source disposed behind a rear side focal point of the projection lens, a reflector that reflects direct light from the light source toward the projection lens, a shade disposed between the projection lens and the light source, and that partially blocks light reflected from the reflector and to form a cut-off line of a light distribution pattern, a first reflective surface disposed in front of the reflector, that partially reflects direct light from the light source downward to the a front of the shade, and a second reflective surface disposed in front of the shade and lower than the rear side focal point of the projection lens, that reflects the light reflected from the first reflective surface toward the projection lens.Type: GrantFiled: March 28, 2014Date of Patent: May 9, 2017Assignee: KOITO MANUFACTURING CO., LTD.Inventor: Takehiko Tajima
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Patent number: 9028118Abstract: A vehicular headlamp has a projection lens, a light source disposed behind a rear focal point of the projection lens, and a reflector that reflects light from the light source forward. The vehicular headlamp forms a forward light distribution pattern. The vehicular headlamp includes a plate-like shade having a front-end portion positioned in the vicinity of the rear focal point of the projection lens to form a cut-off line of the forward light distribution pattern. The shade extends rearward and obliquely downward from the front-end portion. An overhead sign reflective surface is provided on a lower surface of the shade. The overhead sign reflective surface reflects light from the reflector toward the projection lens to form a part of an overhead sign distribution pattern. A dark portion forming portion is formed on the overhead sign reflective surface.Type: GrantFiled: July 30, 2013Date of Patent: May 12, 2015Assignee: Koito Manufacturing Co., Ltd.Inventors: Takehiko Tajima, Akinori Matsumoto
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Patent number: 8944653Abstract: A vehicle lamp is provided with: a projection lens; a light source; a reflector that reflects light from the light source to the projection lens; and a shade member. A shade member includes an opening, and a portion of an inner peripheral edge of the opening is defined by an upper edge of a shading part for shielding a portion of the light reflected on the reflector. A side end portion of a reflection surface of the reflector penetrates the opening of the shade member and extends forward beyond the shading part.Type: GrantFiled: October 24, 2012Date of Patent: February 3, 2015Assignee: Koito Manufacturing Co., Ltd.Inventors: Takehiko Tajima, Akinori Matsumoto
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Publication number: 20140293635Abstract: A vehicular headlamp has a projection lens having an optical axis extending in a front-back direction, a light source disposed behind a rear side focal point of the projection lens, a reflector that reflects direct light from the light source toward the projection lens, a shade disposed between the projection lens and the light source, and that partially blocks light reflected from the reflector and to form a cut-off line of a light distribution pattern, a first reflective surface disposed in front of the reflector, that partially reflects direct light from the light source downward to the a front of the shade, and a second reflective surface disposed in front of the shade and lower than the rear side focal point of the projection lens, that reflects the light reflected from the first reflective surface toward the projection lens.Type: ApplicationFiled: March 28, 2014Publication date: October 2, 2014Applicant: KOITO MANUFACTURING CO., LTD.Inventor: Takehiko Tajima
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Publication number: 20140036524Abstract: A vehicular headlamp has a projection lens, a light source disposed behind a rear focal point of the projection lens, and a reflector that reflects light from the light source forward. The vehicular headlamp forms a forward light distribution pattern. The vehicular headlamp includes a plate-like shade having a front-end portion positioned in the vicinity of the rear focal point of the projection lens to form a cut-off line of the forward light distribution pattern. The shade extends rearward and obliquely downward from the front-end portion. An overhead sign reflective surface is provided on a lower surface of the shade. The overhead sign reflective surface reflects light from the reflector toward the projection lens to form a part of an overhead sign distribution pattern.Type: ApplicationFiled: July 30, 2013Publication date: February 6, 2014Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Takehiko Tajima, Akinori Matsumoto
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Publication number: 20130107558Abstract: A vehicle lamp is provided with: a projection lens; a light source; a reflector that reflects light from the light source to the projection lens; and a shade member. A shade member includes an opening, and a portion of an inner peripheral edge of the opening is defined by an upper edge of a shading part for shielding a portion of the light reflected on the reflector. A side end portion of a reflection surface of the reflector penetrates the opening of the shade member and extends forward beyond the shading part.Type: ApplicationFiled: October 24, 2012Publication date: May 2, 2013Inventors: Takehiko Tajima, Akinori Matsumoto
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Patent number: 7766523Abstract: A lamp unit 18 is provided with a reflecting face 25b for an overhead sign and a light receiving face 28 for the overhead sign. The reflecting face 25b for an overhead sign reflects light from a light source 23a and is provided on an upper side of the light source 23a and rearward from a rear side focal point F of a projector lens 11. The light receiving face 28 for the overhead sign is provided on a front side of a movable shade 30 arranged between the projector lens 11 and the light source 23a. The light receiving face 28 forms overhead sign irradiating light P2 by reflecting light from the reflecting face 25b for the overhead sign to the projector lens 11. Illuminance reducer for reducing a portion of irradiating light is provided at a position of a vicinity of an upper end of the movable shade 30 of the light receiving face 28a for the overhead sign.Type: GrantFiled: April 24, 2007Date of Patent: August 3, 2010Assignee: Koito Manufacturing Co., Ltd.Inventors: Masao Kinoshita, Akinori Matsumoto, Takehiko Tajima
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Patent number: 7654713Abstract: A vehicular lamp includes a projection lens with an optical axis extending in a longitudinal direction of a vehicle and a light source with a light emission portion. The light emission portion is directly incident to the projection lens. The projection lens has a plurality of lens areas with different focal points, with the lens areas centered on the optical axis and disposed on generally concentric circles. The focal points corresponding to the plurality of lens areas have respectively different positions on the optical axis.Type: GrantFiled: January 14, 2008Date of Patent: February 2, 2010Assignee: Koito Manufacturing Co., Ltd.Inventors: Hiroki Tendo, Takehiko Tajima
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Publication number: 20080170409Abstract: A vehicular lamp includes a projection lens with an optical axis extending in a longitudinal direction of a vehicle and a light source with a light emission portion. The light emission portion is directly incident to the projection lens. The projection lens has a plurality of lens areas with different focal points, with the lens areas centered on the optical axis and disposed on generally concentric circles. The focal points corresponding to the plurality of lens areas have respectively different positions on the optical axis.Type: ApplicationFiled: January 14, 2008Publication date: July 17, 2008Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Hiroki Tendo, Takehiko Tajima
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Patent number: 7393126Abstract: A headlamp for vehicle use is provided with: a light source bulb having a light source from which light is emergent; a reflector for reflecting light emergent from the light source; a sub-reflector for reflecting light, which has been reflected on the reflector, to the front side; and a projection lens for directly projecting light of the light source to the front side. These components are arranged in a light chamber composed of a lamp body and a lens cover.Type: GrantFiled: February 1, 2006Date of Patent: July 1, 2008Assignee: Koito Manufacturing Co., Ltd.Inventors: Masahito Naganawa, Takehiko Tajima
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Publication number: 20070247865Abstract: A lamp unit 18 is provided with a reflecting face 25b for an overhead sign and a light receiving face 28 for the overhead sign. The reflecting face 25b for an overhead sign reflects light from a light source 23a and is provided on an upper side of the light source 23a and rearward from a rear side focal point F of a projector lens 11. The light receiving face 28 for the overhead sign is provided on a front side of a movable shade 30 arranged between the projector lens 11 and the light source 23a. The light receiving face 28 forms overhead sign irradiating light P2 by reflecting light from the reflecting face 25b for the overhead sign to the projector lens 11. Illuminance reducer for reducing a portion of irradiating light is provided at a position of a vicinity of an upper end of the movable shade 30 of the light receiving face 28a for the overhead sign.Type: ApplicationFiled: April 24, 2007Publication date: October 25, 2007Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Masao Kinoshita, Akinori Matsumoto, Takehiko Tajima
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Patent number: 7204620Abstract: Front viewability during turning may be enhanced by a headlamp device for a vehicle arranged to perform swivel control. The headlamp device is arranged so that when a vehicle 2 is turning around a right curve with low beam, the vehicle velocity V and the estimated horizontal G value are used to calculate the curve turning radius R, which is then used together with the vehicle velocity R to calculate the driver viewing point angle ? to which the leftward deviation ? of the highest light intensity position in the light distribution pattern PL for low beam is added to calculate the target swivel angle ? on the basis of which the lighting fixture unit of the headlamp 10R is swung over the target swivel angle ? so that light beam is emitted toward a region surrounding the driver viewing point EP on the road ahead of the vehicle in the forward direction.Type: GrantFiled: November 2, 2004Date of Patent: April 17, 2007Assignee: Koito Manufacturing Co., Ltd.Inventors: Ippei Yamamoto, Takehiko Tajima
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Publication number: 20060209556Abstract: An bending lamp is provided with, within a lamp room composed of a lamp body and a cover, a light source bulb equipped with a light source for emitting light; a reflector for reflecting light emitted from said light source; and a projection lens for directly forward projecting the light emitted from said light source. The reflector projects the light emitted from the light source directly outward of the vehicle. The optical axis of the group of light rays directly projected through the projection lens and the optical axis of the group of light rays projected through the reflector are oriented in independent directions.Type: ApplicationFiled: March 15, 2006Publication date: September 21, 2006Inventors: Takehiko Tajima, Masahito Naganawa, Kenichi Takada
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Publication number: 20060171162Abstract: A headlamp for vehicle use is provided with: a light source bulb having a light source from which light is emergent; a reflector for reflecting light emergent from the light source; a sub-reflector for reflecting light, which has been reflected on the reflector, to the front side; and a projection lens for directly projecting light of the light source to the front side. These components are arranged in a light chamber composed of a lamp body and a lens cover.Type: ApplicationFiled: February 1, 2006Publication date: August 3, 2006Inventors: Masahito Naganawa, Takehiko Tajima
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Publication number: 20050122726Abstract: Front viewability during turning may be enhanced by a headlamp device for a vehicle arranged to perform swivel control The headlamp device is arranged so that when a vehicle 2 is turning around a right curve with low beam, the vehicle velocity V and the estimated horizontal G value are used to calculate the curve turning radius R, which is then used together with the vehicle velocity R to calculate the driver viewing point angle ? to which the leftward deviation ? of the highest light intensity position in the light distribution pattern PL for low beam is added to calculate the target swivel angle ? on the basis of which the lighting fixture unit of the headlamp 10R is swung over the target swivel angle ? so that light beam is emitted toward a region surrounding the driver viewing point EP on the road ahead of the vehicle in the forward direction.Type: ApplicationFiled: November 2, 2004Publication date: June 9, 2005Inventors: Ippei Yamamoto, Takehiko Tajima