Patents by Inventor Koichi Kaga

Koichi Kaga 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).

  • Patent number: 7071959
    Abstract: After measurement, light-emitting elements are temporarily numbered (1), . . . in measuring order and arranged successively on a temporary palette. In parallel with this operation, measured light intensity data are input to a computer system in association with the temporary numbers (1), . . . In the computer system, the measured light intensity data are rearranged according to predetermined algorithm to make the light intensity values of adjacent light-emitting elements substantially equal, so that the temporary numbers (1), . . . are rearranged on a memory in accordance with the rearranged data. The rearranged data are sent from the computer system to a robot, so that the light-emitting elements on the temporary palette are arranged on a taping.
    Type: Grant
    Filed: July 9, 2003
    Date of Patent: July 4, 2006
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Hideaki Kato, Koichi Kaga, Kanae Matsumura
  • Patent number: 7001046
    Abstract: An LED lamp has: an LED with a pair of terminals; a holder to which the LED is attached, the holder being of insulating material; and a radiation unit that has two metallic radiation plates that are attached to the holder while surrounding the holder and being insulated from each other. Each of the radiation plates has a contact portion that contacts the pair of terminals of the LED being attached to the holder and a power receiving terminals for power supplied to the LED.
    Type: Grant
    Filed: November 28, 2003
    Date of Patent: February 21, 2006
    Assignees: Toyoda Gosei Co., Ltd., E-Tech Co., Ltd.
    Inventors: Koichi Kaga, Satoru Tahata
  • Patent number: 6906459
    Abstract: A light-emitting diode includes a light-emitting element, a lead assembly for supplying electrical power to the light-emitting element. A reflection mirror is provided in an opposing relation to the light-emitting surface of the light-emitting element. A light-transmissible material seals the light-emitting element, a part of the lead assembly, and the reflection mirror. A radiation surface radiates light reflected on the reflection mirror to the outside. The reflection mirror is a metal mirror which is obtained by processing a metal plate to give it a concave shape or which is obtained by mirror-surface-treating the concave surface of the metal mirror formed by the processing of the metal plate. The radiation surface is formed on the light-transmissible material at its surface at the rear of the light-emitting element.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: June 14, 2005
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Yoshinobu Suehiro, Yuji Takahashi, Koichi Kaga, Kouji Uchida, Yuji Sekitomi
  • Patent number: 6841931
    Abstract: In an LED lamp, a Zener diode is mounted on a copper plate, and a GaN-based light-emitting element is mounted on the Zener diode with an electrode of the element being oriented facedown. Two Zener diodes close to the center of the LED lamp are mounted on a common copper plate, thereby interconnecting the two light-emitting elements in series. Consequently, a Zener diode is connected to the respective two Zener diodes by means of a wire serving as a conductive member. Four light-emitting elements are connected in series, so that four light-emitting elements are connected in series, thus completing a circuit configuration. In this way, use of the Zener diodes for interconnection purpose enables a reduction in the number of minimum required wires. It is better to connect the wire to the upper surfaces of the Zener diodes, thereby obviating a necessity for a redundant wire space and enabling miniaturization of the LED lamp.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: January 11, 2005
    Assignees: Toyoda Gosei Co., Ltd., Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuji Takahashi, Koichi Kaga, Hideaki Kato, Tadaaki Ikeda, Michio Miyawaki
  • Patent number: 6834977
    Abstract: Separate leads and a common lead are provided on the upper and lower surfaces of a substrate. A plurality of LED elements are disposed in an array on the common lead on the upper surface of the substrate. The common lead provided on the upper surface of the substrate is connected to the common lead provided on the lower surface of the substrate through through-hole plating. Heat generated from the plurality of LED elements is transferred through the common lead provided on the upper surface of the substrate and the through-hole plating to the common lead provided on the lower surface of the substrate and is release therefrom into the air. By virtue of this construction, an light emitting device can be realized in which heat radiating properties are homogenized, heat radiation efficiency is improved, and a compact structure is obtained and, thus, the color balance is improved and unfavorable phenomena such as lowering in the output of light emitting elements and shortening of the service life are avoided.
    Type: Grant
    Filed: June 4, 2001
    Date of Patent: December 28, 2004
    Assignees: Toyoda Gosei Co., Ltd., Koha Co., Ltd.
    Inventors: Yoshinobu Suehiro, Yuji Takahashi, Hideaki Kato, Koichi Kaga, Kiyotaka Teshima, Shunsuke Ohtsuka
  • Patent number: 6781648
    Abstract: A light source in a backlight portion is composed of red LEDs, green LEDs, and blue LEDs. The numbers of respective kinds of LEDs used are selected so that the number of blue LEDs is not smaller than the number of red LEDs and the number of blue LEDs is not smaller than the number of green LEDs.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: August 24, 2004
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Yuji Takahashi, Kanae Matsumura, Hideaki Kato, Koichi Kaga
  • Publication number: 20040141337
    Abstract: An LED lamp has: an LED with a pair of terminals; a holder to which the LED is attached, the holder being of insulating material; and a radiation unit that has two metallic radiation plates that are attached to the holder while surrounding the holder and being insulated from each other. Each of the radiation plates has a contact portion that contacts the pair of terminals of the LED being attached to the holder and a power receiving terminals for power supplied to the LED.
    Type: Application
    Filed: November 28, 2003
    Publication date: July 22, 2004
    Applicants: Toyoda Gosei Co., Ltd., E-TECH Co., Ltd.
    Inventors: Koichi Kaga, Satoru Tahata
  • Publication number: 20040113869
    Abstract: After measurement, light-emitting elements are temporarily numbered (1), . . . in measuring order and arranged successively on a temporary palette. In parallel with this operation, measured light intensity data are input to a computer system in association with the temporary numbers (1), . . . In the computer system, the measured light intensity data are rearranged according to predetermined algorithm to make the light intensity values of adjacent light-emitting elements substantially equal, so that the temporary numbers (1), . . . are rearranged on a memory in accordance with the rearranged data. The rearranged data are sent from the computer system to a robot, so that the light-emitting elements on the temporary palette are arranged on a taping.
    Type: Application
    Filed: July 9, 2003
    Publication date: June 17, 2004
    Applicant: Toyoda Gosei Co., Ltd.
    Inventors: Hideaki Kato, Koichi Kaga, Kanae Matsumura
  • Patent number: 6717355
    Abstract: A light-emitting device with an emission wavelength range of from 360 nm to 550 nm and a fluorescent material made of Ca—Al—Si—O—N oxynitride activated with Eu2+ are used so that a part of light emitted from the light-emitting device is emitted while the wavelength of the part of light is converted by the fluorescent material.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: April 6, 2004
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Yuji Takahashi, Koichi Kaga, Koichi Ota, Akihito Ota
  • Patent number: 6540377
    Abstract: A light-emitting system has a base, and LEDs disposed on a front surface of the base. The alignment of the LEDs includes a first group of LEDs each having first and second electrodes on a light-emitting surface side, and a second group of LEDs each having a first electrode on the light-emitting surface side and a second electrode on the base side. The first group of LEDs and the second group of LEDs are arranged alternately in a line on the front surface of the base. The first group of LEDs includes at least one blue LED and green LEDs larger in number than the blue LED. The second group of LEDs includes red LEDs larger in number than the blue LED. A full-color light source unit is provided that includes the first and second groups of LEDS.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: April 1, 2003
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Koichi Ota, Koichi Kaga, Yuji Takahashi, Yoshinobu Suehiro
  • Publication number: 20020149314
    Abstract: In an LED lamp, a Zener diode is mounted on a copper plate, and a GaN-based light-emitting element is mounted on the Zener diode with an electrode of the element being oriented facedown. Two Zener diodes close to the center of the LED lamp are mounted on a common copper plate, thereby interconnecting the two light-emitting elements in series. Consequently, a Zener diode is connected to the respective two Zener diodes by means of a wire serving as a conductive member. Four light-emitting elements are connected in series, so that four light-emitting elements are connected in series, thus completing a circuit configuration. In this way, use of the Zener diodes for interconnection purpose enables a reduction in the number of minimum required wires. It is better to connect the wire to the upper surfaces of the Zener diodes, thereby obviating a necessity for a redundant wire space and enabling miniaturization of the LED lamp.
    Type: Application
    Filed: April 11, 2002
    Publication date: October 17, 2002
    Inventors: Yuji Takahashi, Koichi Kaga, Hideaki Kato, Tadaaki Ikeda, Michio Miyawaki
  • Publication number: 20020080301
    Abstract: A light source in a backlight portion is composed of red LEDs, green LEDs, and blue LEDs. The numbers of respective kinds of LEDs used are selected so that the number of blue LEDs is not smaller than the number of red LEDs and the number of blue LEDs is not smaller than the number of green LEDs.
    Type: Application
    Filed: December 17, 2001
    Publication date: June 27, 2002
    Inventors: Yuji Takahashi, Kanae Matsumura, Hideaki Kato, Koichi Kaga
  • Publication number: 20020043926
    Abstract: A light-emitting device with an emission wavelength range of from 360 nm to 550 nm and a fluorescent material made of Ca—Al—Si—O—N oxynitride activated with Eu2+ are used so that apart of light emitted from the light-emitting device is emitted while the wavelength of the part of light is converted by the fluorescent material.
    Type: Application
    Filed: August 27, 2001
    Publication date: April 18, 2002
    Applicant: TOYODA GOSEI CO., LTD.
    Inventors: Yuji Takahashi, Koichi Kaga, Koichi Ota, Akihito Ota
  • Publication number: 20020001192
    Abstract: Separate leads and a common lead are provided on the upper and lower surfaces of a substrate. A plurality of LED elements are disposed in an array on the common lead on the upper surface of the substrate. The common lead provided on the upper surface of the substrate is connected to the common lead provided on the lower surface of the substrate through through-hole plating. Heat generated from the plurality of LED elements is transferred through the common lead provided on the upper surface of the substrate and the through-hole plating to the common lead provided on the lower surface of the substrate and is released therefrom into the air. By virtue of this construction, an light emitting device can be realized in which heat radiating properties are homogenized, heat radiation efficiency is improved, and a compact structure is obtained and, thus, the color balance is improved and unfavorable phenomena such as lowering in the output of light emitting elements and shortening of the service life are avoided.
    Type: Application
    Filed: June 4, 2001
    Publication date: January 3, 2002
    Inventors: Yoshinobu Suehiro, Yuji Takahashi, Hideaki Kato, Koichi Kaga, Kiyotaka Teshima, Shunsuke Ohtsuka
  • Publication number: 20010024087
    Abstract: This invention provides a light-emitting diode which permits mass production and dense packing into a pattern based on the use of a reflow furnace. Its reflection mirror 15 is obtained by stamping a metal plate to give it a smooth concave shape, and treating its concave surface by plating or depositing, for example, silver. The reflection mirror 15 is placed in an opposing relation to the light-emitting surface of a light-emitting element 11; is shaped like approximately a paraboloid of revolution; and has a focal point at which the center of the light emitting surface of light-emitting element 11 is disposed. The light-emitting element 11, parts of lead assemblies 12a and 12b, a bonding wire 13 and the reflection mirror 15 is integrally sealed with a light transmissible material 14 by transfer molding. The surface of the light transmissible material 14 at the rear of the light-emitting element serves as a radiation surface 21.
    Type: Application
    Filed: December 28, 2000
    Publication date: September 27, 2001
    Inventors: Yoshinobu Suehiro, Yuji Takahashi, Koichi Kaga, Kouji Uchida, Yuji Sekitomi
  • Patent number: 4872364
    Abstract: A steering wheel includes a steering wheel body and a horn pad disposed above a boss section and held by the steering wheel body. The back side of the horn pad is provided with a plurality of hook legs, and the steering wheel body is provided with a plurality of latch portions corresponding to the hook legs. Disposed between the horn pad and the steering wheel body are a spring for urging the horn pad upward and a horn switch unit for actuating a horn in depressing a horn pad. A control portion for actuating the horn switch unit upon depression of the horn pad is arranged in a rear section of the horn pad. Laterally provided in a front section of the horn pad is a center-of-pivot portion which acts as the center of pivot when the horn pad is depressed.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: October 10, 1989
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Koichi Kaga, Akio Hosoi, Takao Yamaguchi
  • Patent number: RE41234
    Abstract: A light-emitting device with an emission wavelength range of from 360 nm to 550 nm and a fluorescent material made of Ca—Al—Si—O—N oxynitride activated with Eu2+ are used so that a part of light emitted from the light-emitting device is emitted while the wavelength of the part of light is converted by the fluorescent material.
    Type: Grant
    Filed: April 5, 2006
    Date of Patent: April 20, 2010
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Yuji Takahashi, Koichi Kaga, Koichi Ota, Akihito Ota, Tadashi Endo