Patents by Inventor Hiroya Koizumi

Hiroya Koizumi 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).

  • Publication number: 20070236930
    Abstract: A clearance lamp serving as a vehicle indicator lamp and a heterochromous lamp having a light source emitting light of a color different from a color of a light source of the clearance lamp are disposed adjacent to each other. A light source employing light emitting diodes, a reflector reflecting light emitted from the light source, and a diffusing lens transmitting and diffusing the light reflected by the reflector are disposed in the clearance lamp. At least a part of the reflector of the clearance lamp is formed as an upright wall portion serving as an interface with the heterochromous lamp.
    Type: Application
    Filed: April 11, 2007
    Publication date: October 11, 2007
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Hiroya Koizumi, Yasuyuki Kato
  • Patent number: 7201503
    Abstract: A vehicular lamp including a translucent member 14 and a light-emitting element 12 with its front being covered by the translucent member 14; a plurality of lens elements 14s1 and 14s2 being formed on the front surface 14b of the translucent member 14 so that the lens elements are located on a hemispherical surface which is centered upon the light-emitting element 12 and serves as a reference plane B. The front surface 14b of the translucent member 14 is divided in a radial pattern to form a plurality of fan-shaped zones SA and SB, which are further divided into concentric circular shapes to form a plurality of fan-shaped zone bands SA1, SA2, SA3 and SA4, and SB1, SB2 and SB3, respectively, which are provided with the lens elements 14s1 and 14s2 therein.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: April 10, 2007
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Yasuyuki Amano, Kazunori Natsume, Hiroya Koizumi
  • Publication number: 20070029563
    Abstract: A light-emitting diode including a curved surface portion 14aA formed in the front face of a sealing member 14 with the cross-sectional shape of the curved surface portion being in the shape of an undulating curve that has a concave curve C1 near the optical axis and convex curves C2 on both sides of concave curve C1, thus allowing the light emitted from a light-emitting chip 12 at a small divergence angle centered on the optical axis Ax to reach the concave curve C1 and to be directed forward as diffused light deflected from the optical axis and further allowing the light emitted at a large divergence angle centered on the optical axis Ax to reach the convex curves C2 and to be directed forward as light deflected toward line L positioned at the divergence angle ?.
    Type: Application
    Filed: August 1, 2006
    Publication date: February 8, 2007
    Inventors: Yasuyuki Amano, Tsutomu Machida, Hiroya Koizumi
  • Patent number: 7021805
    Abstract: A translucent member is arranged so as to cause light originating from an LED light source oriented toward the front of a lamp to enter the translucent member. Outgoing LED light that has entered the translucent member is reflected rearward by a front surface, and then the light is reflected forward by a rear surface, to thereby exit forward of the lamp from the translucent member. At that time, an area on the front surface located in the vicinity of an optical axis Ax is formed as a normal reflection section subjected to reflection surface treatment. The other area of the front surface is formed as an internal reflection section which causes the outgoing LED light to undergo internal reflection. A plurality of reflection elements are formed on the rear surface of the translucent member so as to cause the outgoing LED light reflected from the front surface to enter the internal reflection section at an incidence angle which is smaller than or equal to a critical angle.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: April 4, 2006
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Yasuyuki Amano, Yasuo Teranishi, Hiroya Koizumi
  • Patent number: 7001054
    Abstract: A vehicular lamp including, within its lamp chamber, a reflector 14, a led 20 disposed behind the reflector 14 and a mushroom-shaped light guide 30 that extends coaxially with the led 20 and guides light emitted from the led 20 to the reflector 14. The light guide 30 has an umbrella portion 40 at its front end and a plane of incidence 33, which guides light from the led 20 into the light guide 30, at its rear end. The umbrella portion 40 has a first light emitting surface 42 for emitting light guided into the light guide 30 in the forward direction, reflection surfaces 44 and 46 for internally reflecting the guided light in the rearward direction and radially outward direction, and a second light emitting surface 48 for emitting the internally reflected light toward the reflector 14.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: February 21, 2006
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Hiroya Koizumi, Kazunori Natsume
  • Publication number: 20060002126
    Abstract: A vehicular lamp including partitions 11 and 12, 13 that demarcate the interior of a lamp chamber 3 defined by a lamp body 1 and an outer lens 2 into a plurality of regions 31 to 33, a light source 62a disposed in at least one of the regions, an inner lens 5 provided to cover the partitions, a means for guiding a part of the light emitted from the light source 62a into the inner lens 5. In addition to one region demarcated by the partitions is brought into a lit state by light directly emitted from the light source 62a, the inner lens 5 is lit by the light from the light source 62a that is guided into and radiates from the inner lens surface.
    Type: Application
    Filed: June 14, 2005
    Publication date: January 5, 2006
    Inventors: Hiroya Koizumi, Nobutaka Tezuka, Hajime Takeda, Hidenori Suzuki
  • Patent number: 6951415
    Abstract: Light from an LED light source, which is placed to be directed toward the front of a lamp, is incident on a translucent member, and the light that is transmitted through the translucent member is reflected by a reflector toward the front of the lamp. An internal reflection portion that internally reflects light which is incident on the translucent member at a small angle with respect to an optical axis of the LED light source, in a direction which is substantially perpendicular to the optical axis, and a refraction portion that refracts light which is incident at a large angle with respect to the optical axis, in a direction which is substantially perpendicular to the optical axis, are formed on the surface of the translucent member. The LED emitted light can be caused to be incident on a reflective surface of the reflector in the form of substantially parallel beams which are directed in a direction that is substantially perpendicular to the optical axis.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: October 4, 2005
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Yasuyuki Amano, Hiroya Koizumi
  • Publication number: 20050190564
    Abstract: A vehicular lamp including a translucent member 14 and a light-emitting element 12 with its front being covered by the translucent member 14; a plurality of lens elements 14s1 and 14s2 being formed on the front surface 14b of the translucent member 14 so that the lens elements are located on a hemispherical surface which is centered upon the light-emitting element 12 and serves as a reference plane B. The front surface 14b of the translucent member 14 is divided in a radial pattern to form a plurality of fan-shaped zones SA and SB, which are further divided into concentric circular shapes to form a plurality of fan-shaped zone bands SA1, SA2, SA3 and SA4, and SB1, SB2 and SB3, respectively, which are provided with the lens elements 14s1 and 14s2 therein.
    Type: Application
    Filed: February 23, 2005
    Publication date: September 1, 2005
    Inventors: Yasuyuki Amano, Kazunori Natsume, Hiroya Koizumi
  • Publication number: 20040208019
    Abstract: A vehicular lamp including, within its lamp chamber, a reflector 14, a led 20 disposed behind the reflector 14 and a mushroom-shaped light guide 30 that extends coaxially with the led 20 and guides light emitted from the led 20 to the reflector 14. The light guide 30 has an umbrella portion 40 at its front end and a plane of incidence 33, which guides light from the led 20 into the light guide 30, at its rear end. The umbrella portion 40 has a first light emitting surface 42 for emitting light guided into the light guide 30 in the forward direction, reflection surfaces 44 and 46 for internally reflecting the guided light in the rearward direction and radially outward direction, and a second light emitting surface 48 for emitting the internally reflected light toward the reflector 14.
    Type: Application
    Filed: March 11, 2004
    Publication date: October 21, 2004
    Applicant: Koito Manufacturing Co., Ltd.
    Inventors: Hiroya Koizumi, Kazunori Natsume
  • Publication number: 20040070989
    Abstract: A translucent member is arranged so as to cause light originating from an LED light source oriented toward the front of a lamp to enter the translucent member. Outgoing LED light that has entered the translucent member is reflected rearward by a front surface, and then the light is reflected forward by a rear surface, to thereby exit forward of the lamp from the translucent member. At that time, an area on the front surface located in the vicinity of an optical axis Ax is formed as a normal reflection section subjected to reflection surface treatment. The other area of the front surface is formed as an internal reflection section which causes the outgoing LED light to undergo internal reflection. A plurality of reflection elements are formed on the rear surface of the translucent member so as to cause the outgoing LED light reflected from the front surface to enter the internal reflection section at an incidence angle which is smaller than or equal to a critical angle.
    Type: Application
    Filed: July 2, 2003
    Publication date: April 15, 2004
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Yasuyuki Amano, Yasuo Teranishi, Hiroya Koizumi
  • Publication number: 20040027833
    Abstract: Light from an LED light source, which is placed to be directed toward the front of a lamp, is incident on a translucent member, and the light that is transmitted through the translucent member is reflected by a reflector toward the front of the lamp. An internal reflection portion that internally reflects light which is incident on the translucent member at a small angle with respect to an optical axis of the LED light source, in a direction which is substantially perpendicular to the optical axis, and a refraction portion that refracts light which is incident at a large angle with respect to the optical axis, in a direction which is substantially perpendicular to the optical axis, are formed on the surface of the translucent member. The LED emitted light can be caused to be incident on a reflective surface of the reflector in the form of substantially parallel beams which are directed in a direction that is substantially perpendicular to the optical axis.
    Type: Application
    Filed: July 2, 2003
    Publication date: February 12, 2004
    Applicant: KOITO MANUFACTURING CO., LTD.
    Inventors: Yasuyuki Amano, Hiroya Koizumi