Patents by Inventor Hirotaka Akao
Hirotaka Akao 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: 9759920Abstract: An image display device includes an image generating device, a light guide unit which includes a light guide plate and first and second deflection sections, and a light beam extension device which extends light incident from the image generating device, along a Z direction when an incident direction of light incident on the light guide plate is set to be an X direction and a direction of propagation of light in the light guide plate is set to be a Y direction, and emits the light to the light guide unit, wherein the light beam extension device includes a first reflecting mirror on which light from the image generating device is incident, and a second reflecting mirror which emits light incident from the first reflecting mirror to the light guide unit, and each of the first and second reflecting mirrors has a light reflecting surface having a sawtooth-shaped cross-sectional shape.Type: GrantFiled: January 23, 2015Date of Patent: September 12, 2017Assignee: Sony CorporationInventors: Katsuyuki Akutsu, Hirotaka Akao
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Publication number: 20150138647Abstract: An image display device includes an image generating device, a light guide unit which includes a light guide plate and first and second deflection sections, and a light beam extension device which extends light incident from the image generating device, along a Z direction when an incident direction of light incident on the light guide plate is set to be an X direction and a direction of propagation of light in the light guide plate is set to be a Y direction, and emits the light to the light guide unit, wherein the light beam extension device includes a first reflecting mirror on which light from the image generating device is incident, and a second reflecting mirror which emits light incident from the first reflecting mirror to the light guide unit, and each of the first and second reflecting mirrors has a light reflecting surface having a sawtooth-shaped cross-sectional shape.Type: ApplicationFiled: January 23, 2015Publication date: May 21, 2015Applicant: Sony CorporationInventors: Katsuyuki Akutsu, Hirotaka Akao
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Patent number: 8976453Abstract: An image display device includes an image generating device, a light guide unit which includes a light guide plate and first and second deflection sections, and a light beam extension device which extends light incident from the image generating device, along a Z direction when an incident direction of light incident on the light guide plate is set to be an X direction and a direction of propagation of light in the light guide plate is set to be a Y direction, and emits the light to the light guide unit, wherein the light beam extension device includes a first reflecting mirror on which light from the image generating device is incident, and a second reflecting mirror which emits light incident from the first reflecting mirror to the light guide unit, and each of the first and second reflecting mirrors has a light reflecting surface having a sawtooth-shaped cross-sectional shape.Type: GrantFiled: November 16, 2012Date of Patent: March 10, 2015Assignee: Sony CorporationInventors: Katsuyuki Akutsu, Hirotaka Akao
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Patent number: 8394728Abstract: A film deposition method includes the steps of: coating a solution containing a polysilane compound on a substrate to form a coating film and then carrying out a first thermal treatment in an inert atmosphere, thereby forming the coating film into a silicon film; forming a coating film containing a polysilane compound on the silicon film and then carrying out a second thermal treatment in an inert atmosphere or a reducing atmosphere, thereby forming the coating film into a silicon oxide precursor film; and carrying out a third thermal treatment in an oxidizing atmosphere, thereby forming the silicon oxide precursor film into a silicon oxide film and simultaneously densifying the silicon film.Type: GrantFiled: January 27, 2010Date of Patent: March 12, 2013Assignee: Sony CorporationInventors: Hirotaka Akao, Yuriko Kaino, Takahiro Kamei, Masaki Hara, Kenichi Kurihara
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Publication number: 20100197102Abstract: A film deposition method includes the steps of: coating a solution containing a polysilane compound on a substrate to form a coating film and then carrying out a first thermal treatment in an inert atmosphere, thereby forming the coating film into a silicon film; forming a coating film containing a polysilane compound on the silicon film and then carrying out a second thermal treatment in an inert atmosphere or a reducing atmosphere, thereby forming the coating film into a silicon oxide precursor film; and carrying out a third thermal treatment in an oxidizing atmosphere, thereby forming the silicon oxide precursor film into a silicon oxide film and simultaneously densifying the silicon film.Type: ApplicationFiled: January 27, 2010Publication date: August 5, 2010Applicant: SONY CORPORATIONInventors: Hirotaka Akao, Yuriko Kaino, Takahiro Kamei, Masaki Hara, Kenichi Kurihara
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Patent number: 7345818Abstract: A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer, particles are accumulated by eleven cycles in a regularly alignment such as close packed structure. Diameter of red reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.Type: GrantFiled: July 29, 2005Date of Patent: March 18, 2008Assignee: Sony CorporationInventors: Atsushi Toda, Yoshihiko Kuroki, Michihiro Ohnishi, Hirotaka Akao, Ko Ishimoto
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Patent number: 7335539Abstract: A method for making a thin-film semiconductor device includes an annealing step of irradiating an amorphous semiconductor thin film with a laser beam so as to crystallize the amorphous semiconductor thin film. In the annealing step, the semiconductor thin film is continuously irradiated with the laser beam while shifting the position of the semiconductor thin film irradiated with the laser beam at a predetermined velocity so that excess hydrogen can be removed from the region irradiated with the laser beam without evaporating and expanding hydrogen ions in the semiconductor thin film.Type: GrantFiled: August 16, 2007Date of Patent: February 26, 2008Assignee: Sony CorporationInventors: Akio Machida, Hirotaka Akao, Takahiro Kamei, Isamu Nakao
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Publication number: 20070298550Abstract: A method for making a thin-film semiconductor device includes an annealing step of irradiating an amorphous semiconductor thin film with a laser beam so as to crystallize the amorphous semiconductor thin film. In the annealing step, the semiconductor thin film is continuously irradiated with the laser beam while shifting the position of the semiconductor thin film irradiated with the laser beam at a predetermined velocity so that excess hydrogen can be removed from the region irradiated with the laser beam without evaporating and expanding hydrogen ions in the semiconductor thin film.Type: ApplicationFiled: August 16, 2007Publication date: December 27, 2007Applicant: Sony CorporationInventors: Akio Machida, Hirotaka Akao, Takahiro Kamei, Isamu Nakao
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Patent number: 7273774Abstract: A method for making a thin-film semiconductor device includes an annealing step of irradiating an amorphous semiconductor thin film with a laser beam so as to crystallize the amorphous semiconductor thin film. In the annealing step, the semiconductor thin film is continuously irradiated with the laser beam while shifting the position of the semiconductor thin film irradiated with the laser beam at a predetermined velocity so that excess hydrogen can be removed from the region irradiated with the laser beam without evaporating and expanding hydrogen ions in the semiconductor thin film.Type: GrantFiled: September 27, 2005Date of Patent: September 25, 2007Assignee: Sony CorporationInventors: Akio Machida, Hirotaka Akao, Takahiro Kamei, Isamu Nakao
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Patent number: 7242523Abstract: A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer, particles are accumulated by eleven cycles in a regularly alignment such as close-packed structure. Diameter of red-reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.Type: GrantFiled: April 11, 2005Date of Patent: July 10, 2007Assignee: Sony CorporationInventors: Atsushi Toda, Yoshihiko Kuroki, Michihiro Ohnishi, Hirotaka Akao, Ko Ishimoto
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Publication number: 20070002438Abstract: A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer, particles are accumulated by eleven cycles in a regularly alignment such as close-packed structure. Diameter of red-reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.Type: ApplicationFiled: April 11, 2005Publication date: January 4, 2007Inventors: Atsushi Toda, Yoshihiko Kuroki, Michihiro Ohnishi, Hirotaka Akao, Ko Ishimoto
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Patent number: 7068875Abstract: The present invention provides an optical switch for making part of incident light, which has been made incident on an optical waveguide, selectively emergent to a light emergence portion provided outside the optical waveguide. The optical switch includes a liquid crystal device for selective emergence of the incident light. An arbitrary layer of the liquid crystal device is set such that letting ?n be a difference between a refractive index no of the optical waveguide and a refractive index n1 of the arbitrary layer of the liquid crystal device, “d” be a thickness of the arbitrary layer, and ? be a wavelength of the incident light, the values of ?n, “d”, and ? satisfy a condition of 2.20×10?3?|?n·d·??1|?3.03×10?3. With this optical switch, the uniformity of a light emergence efficiency can be easily realized by making use of a small change region in which the light emergence efficiency is not largely varied. The present invention also provides a display unit using the optical switches.Type: GrantFiled: April 13, 2005Date of Patent: June 27, 2006Assignee: Sony CorporationInventors: Atsushi Toda, Hirotaka Akao, Akira Ishibashi
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Patent number: 7063890Abstract: Such a structure is to be provided in that in the case where a material, such as a protective film, is coated on a fine particle accumulated layer, such as a photonic crystal, penetration of the material into gaps among the fine particles is suppressed, whereby the mechanical strength against bending stress and tensile stress is improved, and peeling and breakage of the fine particle accumulated layer are suppressed, without adverse affect on the optical characteristics, such as reflection characteristics.Type: GrantFiled: January 26, 2004Date of Patent: June 20, 2006Assignee: Sony CorporationInventors: Atsushi Toda, Yuriko Kaino, Hirotaka Akao, Ko Ishimoto
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Patent number: 7035008Abstract: A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer particles are accumulated by eleven cycles in a regularly alignment such as close-packed structure. Diameter of red-reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.Type: GrantFiled: April 11, 2005Date of Patent: April 25, 2006Assignee: Sony CorporationInventors: Atsushi Toda, Yoshihiko Kuroki, Michihiro Ohnishi, Hirotaka Akao, Ko Ishimoto
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Publication number: 20060079033Abstract: A method for making a thin-film semiconductor device includes an annealing step of irradiating an amorphous semiconductor thin film with a laser beam so as to crystallize the amorphous semiconductor thin film. In the annealing step, the semiconductor thin film is continuously irradiated with the laser beam while shifting the position of the semiconductor thin film irradiated with the laser beam at a predetermined velocity so that excess hydrogen can be removed from the region irradiated with the laser beam without evaporating and expanding hydrogen ions in the semiconductor thin film.Type: ApplicationFiled: September 27, 2005Publication date: April 13, 2006Applicant: Sony CorporationInventors: Akio Machida, Hirotaka Akao, Takahiro Kamei, Isamu Nakao
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Publication number: 20060033991Abstract: A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer, particles are accumulated by eleven cycles in a regularly alignment such as close packed structure. Diameter of red reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.Type: ApplicationFiled: July 29, 2005Publication date: February 16, 2006Inventors: Atsushi Toda, Yoshihiko Kuroki, Michihiro Ohnishi, Hirotaka Akao, Ko Ishimoto
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Patent number: 6961175Abstract: A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer, particles are accumulated by eleven cycles in a regularly alignment such as close-packed structure. Diameter of red-reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.Type: GrantFiled: March 26, 2002Date of Patent: November 1, 2005Assignee: Sony CorporationInventors: Atsushi Toda, Yoshihiko Kuroki, Michihiro Ohnishi, Hirotaka Akao, Ko Ishimoto
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Publication number: 20050232535Abstract: The present invention provides an optical switch for making part of incident light, which has been made incident on an optical waveguide, selectively emergent to a light emergence portion provided outside the optical waveguide. The optical switch includes a liquid crystal device for selective emergence of the incident light. An arbitrary layer of the liquid crystal device is set such that letting ?n be a difference between a refractive index no of the optical waveguide and a refractive index n1 of the arbitrary layer of the liquid crystal device, “d” be a thickness of the arbitrary layer, and ? be a wavelength of the incident light, the values of ?n, “d”, and ? satisfy a condition of 2.20×10?3?|?n·d·??1|?3.03×10?3. With this optical switch, the uniformity of a light emergence efficiency can be easily realized by making use of a small change region in which the light emergence efficiency is not largely varied. The present invention also provides a display unit using the optical switches.Type: ApplicationFiled: April 13, 2005Publication date: October 20, 2005Inventors: Atsushi Toda, Hirotaka Akao, Akira Ishibashi
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Publication number: 20050180003Abstract: A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer particles are accumulated by eleven cycles in a regularly alignment such as close-packed structure. Diameter of red-reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.Type: ApplicationFiled: April 11, 2005Publication date: August 18, 2005Inventors: Atsushi Toda, Yoshihiko Kuroki, Michihiro Ohnishi, Hirotaka Akao, Ko Ishimoto
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Patent number: 6895138Abstract: The present invention provides an optical switch for making part of incident light, which has been made incident on an optical waveguide, selectively emergent to a light emergence portion provided outside the optical waveguide. The optical switch includes a liquid crystal device for selective emergence of the incident light. An arbitrary layer of the liquid crystal device is set such that letting ?n be a difference between a refractive index n0 of the optical waveguide and a refractive index n1 of the arbitrary layer of the liquid crystal device, “d” be a thickness of the arbitrary layer, and ? be a wavelength of the incident light, the values of ?n, “d”, and ? satisfy a condition of 2.20×10?3?|?n·d·??1|?3.03×10?3. With this optical switch, the uniformity of a light emergence efficiency can be easily realized by making use of a small change region in which the light emergence efficiency is not largely varied. The present invention also provides a display unit using the optical switches.Type: GrantFiled: May 5, 2004Date of Patent: May 17, 2005Assignee: Sony CorporationInventors: Atsushi Toda, Hirotaka Akao, Akira Ishibashi