Patents by Inventor Motohiro Komatsu
Motohiro Komatsu 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: 20100277939Abstract: A vehicular lamp comprising includes a light-emitting diode that is used as a light source and that emits light; and a light transmitting member that is arranged in a path of the emitted light and through which the light is passed. The light transmitting member shields the light-emitting diode from infrared rays that travel in an opposite direction to a traveling direction of the light.Type: ApplicationFiled: April 20, 2010Publication date: November 4, 2010Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Motohiro Komatsu, Hiroyuki Serizawa, Hiroyuki Ishida, Shigeyuki Watanabe, Kiyoshi Sazuka
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Patent number: 7726859Abstract: A lamp unit of a vehicular headlamp includes a projection lens with an optical axis; a light source formed from a semiconductor light-emitting element; a first reflector that reflects light from the light source so as to condense such light on or near the optical axis; and a shade positioned between the light source and the projection lens so as to extend along the optical axis direction. The shade shields part of the light reflected by the first reflector. In the lamp unit of the vehicular headlamp, a shielding surface extends rearward from a front end of the shade, where the shade is positioned near a rearward focal point Rf of the projection lens. The shielding surfaces serve as a second reflector that reflects light from the first reflector toward the projection lens.Type: GrantFiled: March 7, 2008Date of Patent: June 1, 2010Assignee: Koito Manufacturing Co., Ltd.Inventors: Masahito Naganawa, Motohiro Komatsu
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Patent number: 7575352Abstract: A vehicular headlamp includes at least one a light source irradiating visible light and a lens allowing the visible light from the light source to pass through to forward of a vehicle. The light source and the lens are mounted in a rotating element. Alternatively, the vehicular headlamp includes at least one a light source irradiating visible light, and a mirror mounted on a rotating element and arranged to reflect the visible light from the at least one light source to forward of a vehicle. The vehicular headlamp also includes a scanning actuator for reciprocatingly rotating the rotating element so as to form a light distribution pattern forward of the vehicle and a light distribution control portion for controlling the scanning actuator such that a portion of the light distribution pattern is relatively bright.Type: GrantFiled: August 8, 2008Date of Patent: August 18, 2009Assignee: Koito Manufacturing Co., Ltd.Inventors: Noriko Sato, Motohiro Komatsu, Naoki Uchida, Takuo Sugiyama, Mitsuyuki Mochizuki
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Patent number: 7510310Abstract: A vehicle lighting device includes a light source unit for emitting light for forming a high beam light distribution pattern by projecting forward light from the light source unit. The high beam light distribution pattern has at least two illumination patterns which illuminate areas which are different from each other. A control unit is provided for controlling the at least two illumination patterns to be turned on and off selectively.Type: GrantFiled: December 20, 2006Date of Patent: March 31, 2009Assignee: Koito Manufacturing Co., Ltd.Inventor: Motohiro Komatsu
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Patent number: 7500773Abstract: A lamp unit of a vehicle headlamp characterized in a lamp unit of a vehicle headlamp includes a projecting lens arranged on an optical axis extended in a front and rear direction of a vehicle, a first light emitting element arranged on a rear side of a rear side focal point of the projecting lens, and a reflector for reflecting light from the first light emitting element to a front side to be proximate to an optical axis. A vicinity of a rear side focal face of the projecting lens is arranged with a plurality of second light emitting elements for emitting light to the projecting lens.Type: GrantFiled: February 8, 2007Date of Patent: March 10, 2009Assignee: Koito Manufacturing Co., Ltd.Inventor: Motohiro Komatsu
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Publication number: 20090046474Abstract: A vehicular headlamp includes at least one a light source irradiating visible light and a lens allowing the visible light from the light source to pass through to forward of a vehicle. The light source and the lens are mounted in a rotating element. Alternatively, the vehicular headlamp includes at least one a light source irradiating visible light, and a mirror mounted on a rotating element and arranged to reflect the visible light from the at least one light source to forward of a vehicle. The vehicular headlamp also includes a scanning actuator for reciprocatingly rotating the rotating element so as to form a light distribution pattern forward of the vehicle and a light distribution control portion for controlling the scanning actuator such that a portion of the light distribution pattern is relatively bright.Type: ApplicationFiled: August 8, 2008Publication date: February 19, 2009Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Noriko Sato, Motohiro Komatsu, Naoki Uchida, Takuo Sugiyama, Mitsuyuki Mochizuki
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Publication number: 20090027908Abstract: A lamp unit used in a vehicular lamp includes a reflector provided with a parabolic cylindrical reflective surface with a focal line in the horizontal direction; a planar light source having a light-emitting surface with a generally oblong shaped region; and a drive portion that rotatably supports the semiconductor light-emitting element portion. The generally oblong shaped region of the planar light source includes a long side in a direction parallel to the focal line and a short side of a predetermined width. The planar light source is disposed such that the light-emitting surface faces the parabolic cylindrical reflective surface of the reflector and such that a long side, on a lamp front side, generally coincides with the focal line and acts as a rotational axis.Type: ApplicationFiled: November 9, 2007Publication date: January 29, 2009Applicant: KOITO MANUFACTURING CO., LTD.Inventor: Motohiro Komatsu
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Publication number: 20080239745Abstract: A lamp unit of a vehicular headlamp includes a projection lens with an optical axis; a light source formed from a semiconductor light-emitting element; a first reflector that reflects light from the light source so as to condense such light on or near the optical axis; and a shade positioned between the light source and the projection lens so as to extend along the optical axis direction. The shade shields part of the light reflected by the first reflector. In the lamp unit of the vehicular headlamp, a shielding surface extends rearward from a front end of the shade, where the shade is positioned near a rearward focal point Rf of the projection lens. The shielding surfaces serve as a second reflector that reflects light from the first reflector toward the projection lens.Type: ApplicationFiled: March 7, 2008Publication date: October 2, 2008Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Masahito Naganawa, Motohiro Komatsu
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Patent number: 7416322Abstract: A vehicle light emitting device including a light emitting element, a primary reflector, and a secondary reflector. A reflecting surface of the primary reflector has a shape of a substantially dome-shaped body of revolution formed by rotating about the optical axis Ax an ellipse E which has a primary focal point F1 which is a point near the light emitting element and a secondary focal point F2 which is a point near the reflecting surface. The primary reflector includes a belt-shaped region, which straddles a ring-shaped locus of the secondary focal point F2 and is configured as a light translucent portion, whereby reflected light from the primary reflector is caused to temporarily converge on the secondary focal point F2 in each cross-section of the body of revolution including the optical axis Ax and is thereafter caused to be incident on the secondary reflector as a diffused light.Type: GrantFiled: November 21, 2005Date of Patent: August 26, 2008Assignee: Koito Manufacturing Co., Ltd.Inventors: Hidetada Tanaka, Motohiro Komatsu
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Patent number: 7416323Abstract: A distance from a center position of the light source to a rear focal point of a projection lens is smaller than a focal length of the projection lens. The light source is constituted by a line segment light source extended in a vehicle width direction. An opening portion is formed at a rear portion of a first reflector. A second reflector reflects light directed to a rear side from the light source to a front side to be proximate to an optical axis.Type: GrantFiled: March 15, 2006Date of Patent: August 26, 2008Assignee: Koito Manufacturing Co., Ltd.Inventors: Noriko Okada, Motohiro Komatsu
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Patent number: 7407310Abstract: A vehicular headlamp 1 including a projection lens 16 installed on the optical axis Ax extending in the longitudinal direction of the vehicle a light source 12a provided behind the rear side focal point F of the projection lens 16, and a reflector 14 that reflects direct light from the light source 12a forward and toward the optical axis Ax; and in this headlamp, an additional lens 30, which deflects and directs light from the light source 12a to the front is provided around the outer perimeter of the projection lens 16, and grooves 33, which have side faces that direct at least a part of the incident light toward the side of the vehicle, are formed in the outer surface of the additional lens 30.Type: GrantFiled: December 11, 2006Date of Patent: August 5, 2008Assignee: Koito Manufacturing Co., Ltd.Inventor: Motohiro Komatsu
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Publication number: 20080180965Abstract: A vehicular lamp having a light source unit 30 provided inside a lamp chamber formed by a lamp body 10 and a front cover 20, wherein a millimeter wave radar 40 is provided inside the lamp chamber, and a light guide plate 60 is provided between the front cover 20 and the millimeter wave radar 40, and the light guide plate 60 is illuminated by the light source of the lamp or by a dedicated light source provided solely for the light guide plate 60.Type: ApplicationFiled: January 30, 2008Publication date: July 31, 2008Inventors: Hiromi Nakamura, Yuichi Shibata, Yoshinao Daicho, Nobutaka Tezuka, Motohiro Komatsu
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Publication number: 20080144328Abstract: A vehicle lamp is provided. The vehicle lamp includes a lens disposed on an optical axis of the vehicle lamp, the optical axis extending in a front-and-rear direction of the vehicle lamp, the lens comprising a first concave lens portion; a plurality of light emitting elements disposed to a rear side of the lens and around the optical axis at regular intervals in a circumferential direction, the plurality of light emitting elements comprising at least one first light emitting element disposed to a rear side of the first concave lens portion; at least one first reflector corresponding to the at least one first light emitting element and disposed between the corresponding first light emitting element and the optical axis, wherein the first reflector comprises a first reflecting surface which reflects light from the corresponding first light emitting element toward the first concave lens portion.Type: ApplicationFiled: December 19, 2007Publication date: June 19, 2008Applicant: KOITO MANUFACTURING CO., LTD.Inventors: Takayuki YAGI, Motohiro KOMATSU
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Patent number: 7370997Abstract: A light emitting unit is provided forward in the vicinity of the upper part of an optical axis extended in the longitudinal direction of a lighting unit. Furthermore, a light transmitting member is provided on the forward side of the light emitting unit. A front surface of the light transmitting member is constituted by a rotating elliptical surface with the optical axis to be a central axis, and a rear end face is formed to pass through a first focal point on the rear side of the rotating elliptical surface. Moreover, a reflector having a reflecting plane formed to surround a light emitting chip almost cylindrically is provided between the light emitting unit and the light transmitting member in such a manner that a front end opening portion is caused to abut on the rear end face 14b of the light transmitting member.Type: GrantFiled: March 18, 2005Date of Patent: May 13, 2008Assignee: Koito Manufacturing Co., Ltd.Inventor: Motohiro Komatsu
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Patent number: 7364332Abstract: A light source bulb 22 is inserted and fixed into a reflector 24 from a side in a position placed downward apart from an optical axis Ax. Thus, it is possible to effectively utilize an optical-axis side region in a reflecting plane 24a for a light distribution control. Moreover, an almost prism-shaped light transmitting member 30 is provided in the vicinity of the upper end of the outer peripheral edge portion of a projection lens 28 between the projection lens 28 and the reflector 24, and a direct light from a light source 22a toward the upper space of the projection lens 28 is emitted forward to be deflected downward. Consequently, it is possible to increase the amount of a light to be irradiated on the forward part of a vehicle, and furthermore, to carry out a deflection control for the direct light emitted from the light source 22a with high precision.Type: GrantFiled: March 1, 2005Date of Patent: April 29, 2008Assignee: Koito Manufacturing Co., Ltd.Inventors: Motohiro Komatsu, Michihiko Hayakawa
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Patent number: 7293902Abstract: A vehicle headlamp is provided with: a projection lens; a light source; a reflector for reflecting light, which has been directly emitted by the light source, to a front side along an optical axis; and a shade arranged between the projection lens and the reflector, for shading a part of light reflected by the reflector 24. A bright and dark boundary forming portion capable of forming a cutoff line of a light distribution pattern is formed at an upper edge portion of the shade. In a neighborhood of the bright and dark boundary forming portion on a front face of the shade, a low reflecting region is provided. A reflectance of the low reflecting region is lower than a reflectance of a high reflecting region. A reflectance of the high reflecting region is higher than a reflectance of a rear face of the shade.Type: GrantFiled: March 15, 2006Date of Patent: November 13, 2007Assignee: Koito Manufacturing Co., Ltd.Inventor: Motohiro Komatsu
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Patent number: 7290909Abstract: Light emitted from a light source 12a is sequentially reflected on a first, second, and third additional reflectors in this order. By emitting light in the order of the reflectors, this allows the light to be parallel to an optical axis by an additional lens. Accordingly, it is possible to increase the light-emitting area of the entire headlamp, thereby improving the appearance of the headlamp with respect to the driver of the oncoming vehicle. The additional lens is formed to have a substantially wedge-shaped cross-section, and is provided along the surface shape of a projection lens. Furthermore, since the light emitted from the light source is sequentially reflected by the first, second, and third additional reflectors in this order, the light emitted from the light source can be focused and the quantity of the light passing through the additional lens is not excessively increased.Type: GrantFiled: May 10, 2006Date of Patent: November 6, 2007Assignee: Koito Manufacturing Co., Ltd.Inventors: Motohiro Komatsu, Kazuki Okui
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Publication number: 20070201241Abstract: A lamp unit of a vehicle headlamp characterized in a lamp unit of a vehicle headlamp includes a projecting lens arranged on an optical axis extended in a front and rear direction of a vehicle, a first light emitting element arranged on a rear side of a rear side focal point of the projecting lens, and a reflector for reflecting light from the first light emitting element to a front side to be proximate to an optical axis. A vicinity of a rear side focal face of the projecting lens is arranged with a plurality of second light emitting elements for emitting light to the projecting lens.Type: ApplicationFiled: February 8, 2007Publication date: August 30, 2007Applicant: KOITO MANUFACTURING CO., LTD.Inventor: Motohiro Komatsu
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Publication number: 20070159839Abstract: A vehicular headlamp 1 including a projection lens 16 installed on the optical axis Ax extending in the longitudinal direction of the vehicle a light source 12a provided behind the rear side focal point F of the projection lens 16, and a reflector 14 that reflects direct light from the light source 12a forward and toward the optical axis Ax; and in this headlamp, an additional lens 30, which deflects and directs light from the light source 12a to the front is provided around the outer perimeter of the projection lens 16, and grooves 33, which have side faces that direct at least a part of the incident light toward the side of the vehicle, are formed in the outer surface of the additional lens 30.Type: ApplicationFiled: December 11, 2006Publication date: July 12, 2007Inventor: Motohiro Komatsu
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Publication number: 20070147055Abstract: A vehicle lighting device includes a light source unit for emitting light for forming a high beam light distribution pattern by projecting forward light from the light source unit. The high beam light distribution pattern has at least two illumination patterns which illuminate areas which are different from each other. A control unit is provided for controlling the at least two illumination patterns to be turned on and off selectively.Type: ApplicationFiled: December 20, 2006Publication date: June 28, 2007Applicant: KOITO MANUFACTURING CO., LTD.Inventor: Motohiro Komatsu