Patents by Inventor Katsufumi Kondo
Katsufumi Kondo 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: 20090224269Abstract: A semiconductor light emitting device includes: an upper growth layer including a light emitting layer; a transparent substrate through which a radiant light from the light emitting layer passes; and a foundation layer provided between the upper growth layer and the transparent substrate, the foundation layer having a surface-controlling layer and a bonding layer bonded with the transparent substrate. The surface-controlling layer is made of compound semiconductor including at least Ga and As. The upper growth layer is formed on an upper surface of the surface-controlling layer. A lattice constant difference at an interface between the surface-controlling layer and the upper growth layer is smaller than that at an interface between the bonding layer and the transparent substrate.Type: ApplicationFiled: February 24, 2009Publication date: September 10, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Ryo Saeki, Katsufumi Kondo, Yasuo Idei
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Patent number: 7329903Abstract: For the purpose of enhancing the light extracting efficiency, improving the production yield and elongating the lifetime of a semiconductor light emitting element or a semiconductor light emitting device using the element, a semiconductor light emitting element comprises: a light emitting layer that emits light; and a substrate transparent to the light emitted from the light emitting layer. The substrate defines a top surface supporting the light emitting layer thereon; a bottom surface opposed to the top surface and side surfaces connecting the top surface and the bottom surface. Each of the side surfaces is composed of first side surface extending from the top surface toward the bottom surface, second side surface extending from the first side surface toward the bottom surface, and third side surface extending from the second side surface toward the bottom surface.Type: GrantFiled: March 8, 2006Date of Patent: February 12, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Koichi Nitta, Takafumi Nakamura, Kuniaki Konno, Yasuhiko Akaike, Yoshiki Endo, Katsufumi Kondo
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Publication number: 20060151798Abstract: For the purpose of enhancing the light extracting efficiency, improving the production yield and elongating the lifetime of a semiconductor light emitting element or a semiconductor light emitting device using the element, a semiconductor light emitting element comprises: a light emitting layer that emits light; and a substrate transparent to the light emitted from the light emitting layer. The substrate defines a top surface supporting the light emitting layer thereon; a bottom surface opposed to the top surface and side surfaces connecting the top surface and the bottom surface. Each of the side surfaces is composed of first side surface extending from the top surface toward the bottom surface, second side surface extending from the first side surface toward the bottom surface, and third side surface extending from the second side surface toward the bottom surface.Type: ApplicationFiled: March 9, 2006Publication date: July 13, 2006Inventors: Koichi Nitta, Takafumi Nakamura, Kuniaki Konno, Yasuhiko Akaike, Yoshiki Endo, Katsufumi Kondo
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Publication number: 20060145171Abstract: For the purpose of enhancing the light extracting efficiency, improving the production yield and elongating the lifetime of a semiconductor light emitting element or a semiconductor light emitting device using the element, a semiconductor light emitting element comprises: a light emitting layer that emits light; and a substrate transparent to the light emitted from the light emitting layer. The substrate defines a top surface supporting the light emitting layer thereon; a bottom surface opposed to the top surface and side surfaces connecting the top surface and the bottom surface. Each of the side surfaces is composed of first side surface extending from the top surface toward the bottom surface, second side surface extending from the first side surface toward the bottom surface, and third side surface extending from the second side surface toward the bottom surface.Type: ApplicationFiled: March 8, 2006Publication date: July 6, 2006Inventors: Koichi Nitta, Takafumi Nakamura, Kuniaki Konno, Yasuhiko Akaike, Yoshiki Endo, Katsufumi Kondo
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Patent number: 7038245Abstract: For the purpose of enhancing the light extracting efficiency, improving the production yield and elongating the lifetime of a semiconductor light emitting element or a semiconductor light emitting device using the element, a semiconductor light emitting element comprises: a light emitting layer that emits light; and a substrate transparent to the light emitted from the light emitting layer. The substrate defines a top surface supporting the light emitting layer thereon; a bottom surface opposed to the top surface and side surfaces connecting the top surface and the bottom surface. Each of the side surfaces is composed of first side surface extending from the top surface toward the bottom surface, second side surface extending from the first side surface toward the bottom surface, and third side surface extending from the second side surface toward the bottom surface.Type: GrantFiled: March 13, 2003Date of Patent: May 2, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Koichi Nitta, Takafumi Nakamura, Kuniaki Konno, Yasuhiko Akaike, Yoshiki Endo, Katsufumi Kondo
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Patent number: 6936864Abstract: A semiconductor light emitting element comprising: a first layer; a semiconductor light emitting layer; a current blocking layer; a second layer; a first electrode; and a second electrode is provided. The semiconductor light emitting layer is selectively provided on the first layer. The current blocking layer of high resistance is provided around the semiconductor light emitting layer on the first layer. The second layer is provided on the semiconductor light emitting layer and the current blocking layer. The first electrode is provided on the second layer. The second electrode is provided on the back of the first layer. A part of a light emitted from the semiconductor light emitting layer is emitted outside through the first layer, and a part of the light emitted from the semiconductor light emitting layer is emitted outside through the second layer.Type: GrantFiled: February 17, 2004Date of Patent: August 30, 2005Assignee: Kabushiki Kaisha ToshibaInventor: Katsufumi Kondo
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Publication number: 20040184499Abstract: A semiconductor light emitting element comprising a first layer; a semiconductor light emitting layer; a current blocking layer; a second layer; a first electrode; and a second electrode is provided. The semiconductor light emitting layer is selectively provided on the first layer. The current blocking layer of high resistance is provided around the semiconductor light emitting layer on the first layer. The second layer is provided on the semiconductor light emitting layer and the current blocking layer. The first electrode is provided on the second layer. The second electrode is provided on the back of the first layer. A part of a light emitted from the semiconductor light emitting layer is emitted outside through the first layer, and a part of the light emitted from the semiconductor light emitting layer is emitted outside through the second layer.Type: ApplicationFiled: February 17, 2004Publication date: September 23, 2004Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Katsufumi Kondo
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Publication number: 20030197191Abstract: For the purpose of enhancing the light extracting efficiency, improving the production yield and elongating the lifetime of a semiconductor light emitting element or a semiconductor light emitting device using the element, a semiconductor light emitting element comprises: a light emitting layer that emits light; and a substrate transparent to the light emitted from the light emitting layer. The substrate defines a top surface supporting the light emitting layer thereon; a bottom surface opposed to the top surface and side surfaces connecting the top surface and the bottom surface. Each of the side surfaces is composed of first side surface extending from the top surface toward the bottom surface, second side surface extending from the first side surface toward the bottom surface, and third side surface extending from the second side surface toward the bottom surface.Type: ApplicationFiled: March 13, 2003Publication date: October 23, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Koichi Nitta, Takafumi Nakamura, Kuniaki Konno, Yasuhiko Akaike, Yoshiki Endo, Katsufumi Kondo
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Patent number: 6548834Abstract: A semiconductor light emitting element is proposed that improves a light extraction efficiency without requiring any complicated processes and techniques. The semiconductor light emitting element includes an active layer for emitting first light by current injection, and a light absorbing and emitting section for absorbing a part of the first light and for emitting second light having a greater peak wavelength than the first light. A difference in peak wavelength between the first light and the second light is in a range in which a spectrum of a mixture of the first and second light maintains a unimodal characteristic or is smaller than 0.9 times a half width of the spectrum of the first light.Type: GrantFiled: January 25, 2002Date of Patent: April 15, 2003Assignee: Kabushiki Kaisha ToshibaInventors: Hideto Sugawara, Koichi Nitta, Ryo Saeki, Katsufumi Kondo, Masanobu Iwamoto
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Publication number: 20020139984Abstract: A semiconductor light emitting element is proposed that improves a light extraction efficiency without requiring any complicated processes and techniques. The semiconductor light emitting element includes an active layer for emitting first light by current injection, and a light absorbing and emitting section for absorbing a part of the first light and for emitting second light having a greater peak wavelength than the first light. A difference in peak wavelength between the first light and the second light is in a range in which a spectrum of a mixture of the first and second light maintains a unimodal characteristic or is smaller than 0.9 times a half width of the spectrum of the first light.Type: ApplicationFiled: January 25, 2002Publication date: October 3, 2002Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hideto Sugawara, Koichi Nitta, Ryo Saeki, Katsufumi Kondo, Masanobu Iwamoto
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Patent number: 5481355Abstract: The initial movement of a spherical body is detected by detecting the intersection with a light beam emitted from trigger light illuminating portion 2 to trigger light-receiving portion 3, and as a result, measurement of time by an arithmetic processing unit is started. During flight, spherical body 1 intersects light beams emitted from surface velocity sensors 4 and 5, the reflected light therein is detected by these surface velocity sensors 4 and 5, and the surface velocity of spherical body 1 is then measured. Spherical body 1 continues in flight and intersects at least two light beams irradiated from multi-beam illuminating portion 6 which are detected by multi-beam light-receiving portion 7.Type: GrantFiled: August 5, 1993Date of Patent: January 2, 1996Assignee: Yamaha CorporationInventors: Kenzaburou Iijima, Katsufumi Kondo, Katsuhiko Masuda, Kouji Yataka, Yasuyuki Chujo
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Patent number: 5214232Abstract: An electric guitar has a plurality of strings stretched over a rigid body and a neck, and a vibration detecting unit embedded into the rigid body, and the vibration detecting unit has a plurality of photo emitting elements paired with a plurality of photo detecting elements spaced apart from the associated photo emitting diodes in directions parallel to the associated strings, wherein the photo emitting elements radiate light spots toward the associated strings for causing the reflections to be fallen upon the associated photo detecting elements so that the photo detecting elements produces photo currents without any diffraction of light.Type: GrantFiled: October 17, 1991Date of Patent: May 25, 1993Assignee: Yamaha CorporationInventors: Kenzaburo Iijima, Katsufumi Kondo
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Patent number: 5134499Abstract: A video recording apparatus used for a television system and the like writes video information on a track formed on a recording medium in a writing direction which directs from a predetermined start position to a predetermined end position of track by use of a head. Thereafter, the video information is read from a desirable designated positon of the track in the writing direction. The read video information is reproduced and then its corresponding pictures are displayed on a display unit of the television system. This video information is not outputted from the recording medium in a period while the head returns to the predetermined start position of the track after the video information at the predetermined end position of the track is read out. So, this video recording apparataus can provide a memory which stores the video information and then outputs the video information during such period. Thus, the video information can be continuously obtained.Type: GrantFiled: August 3, 1989Date of Patent: July 28, 1992Assignee: Yamaha CorporationInventors: Takeo Sata, Kenzaburo Iijima, Katsufumi Kondo, Nobuji Kato