Patents by Inventor Naotada Okada
Naotada Okada 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: 7764334Abstract: An illumination apparatus includes: a light guide plate composed of a plurality of aligned blocks; and a plurality of light sources, each being provided for one of the blocks and emitting light to the one block. A gap of 0.1 microns or more is formed in at least part of a region between the adjacent blocks. An inside of the gap serves as an air layer.Type: GrantFiled: June 29, 2007Date of Patent: July 27, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Toshitake Kitagawa, Naotada Okada
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Publication number: 20100164702Abstract: An automotive display system includes an image projection unit and an angle information acquisition unit. The image projection unit projects a light flux including an image including a display object toward one eye of an image viewer. The angle information acquisition unit acquires at least one of vehicle angle information and external environment angle information. The vehicle angle information relates to an angle of at least one of an attitude and a heading of a vehicle carrying the image viewer. The external environment angle information relates to an angle of a background object at a target position of the display object in a background of an external environment of the vehicle. The image projection unit changes an angle of the display object in the image based on at least one of the vehicle angle information and the external environment angle information acquired by the angle information acquisition unit.Type: ApplicationFiled: September 28, 2009Publication date: July 1, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takashi Sasaki, Aira Hotta, Haruhiko Okumura, Masatoshi Ogawa, Osamu Nagahara, Tsuyoshi Hagiwara, Kazuo Horiuchi, Naotada Okada
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Publication number: 20100157430Abstract: An automotive display system includes a frontward information acquisition unit, a position detection unit and an image projection unit. The frontward information acquisition unit acquires frontward information. The frontward information includes information relating to a frontward path of a vehicle. The position detection unit detects a position of one eye of an image viewer riding in the vehicle. The image projection unit generates a first virtual image at a corresponding position in scenery of the frontward path based on the frontward information acquired by the frontward information acquisition unit and projects a light flux including an image including the generated first virtual image toward the one eye of the image viewer based on the detected position of the one eye. The first virtual image has a size corresponding to at least one of a vehicle width and a vehicle height.Type: ApplicationFiled: September 28, 2009Publication date: June 24, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Aira Hotta, Takashi Sasaki, Haruhiko Okumura, Masatoshi Ogawa, Osamu Nagahara, Tsuyoshi Hagiwara, Kazuo Horiuchi, Naotada Okada
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Publication number: 20100073579Abstract: There is provided an optical member comprising: a first optical layer having: a first main face formed with a concave section having a concave curved surface, and a plurality of convex ridges having concave curved surfaces provided in concentric circular fashion around said concave section; and a second main face formed with: a convex section having a convex curved surface that is provided facing the concave section and constituting a second main face facing the first main face; and a plurality of convex ridges having convex curved surfaces provided facing the plurality of convex ridges having the concave curved surface, provided in concentric circular fashion around the convex section; and a second optical layer provided on the first main face of the first optical layer; and a third optical layer provided on the second main face of the first optical layer; wherein the refractive index of the first optical layer is higher than the refractive index of the second optical layer and is higher than the refractiveType: ApplicationFiled: September 21, 2009Publication date: March 25, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Naotada Okada, Kazuo Horiuchi, Haruhiko Okumura, Takashi Sasaki
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Publication number: 20100066984Abstract: A display device is provided that includes: a projection unit emitting a light flux including image information; and a divergence angle controlling unit controlling a divergence angle of the light flux emitted from the projection unit to not more than a prescribed angle. The divergence angle controlling unit includes a transmission unit transmitting the light flux emitted from the projection unit and a light shielding unit shielding part of the light flux, and the part of the light flux is shielded by the light shielding unit so that the divergence angle of the light flux is controlled to not more than a prescribed angle.Type: ApplicationFiled: September 16, 2009Publication date: March 18, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kazuo HORIUCHI, Naotada Okada, Haruhiko Okumura, Takashi Sasaki, Aira Hotta
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Publication number: 20090267101Abstract: A display includes pixels each of which contains a light emitting element and which are arranged in a matrix form, a light transmitting insulating layer which includes a back surface facing the light emitting element and a front surface as a light output surface, a beam-condensing element which is arranged on a back side of the insulating layer and increases a directivity of light emitted by the light emitting element to make the light incident on the insulating layer, and a diffusing element which is arranged on a front side of the insulating layer, diffuses light from the insulating layer, and output the diffused light to an external environment.Type: ApplicationFiled: July 9, 2009Publication date: October 29, 2009Inventors: Tsuyoshi Uemura, Satoshi Okutani, Hirofumi Kubota, Naotada Okada, Junichi Tonotani
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Publication number: 20090244702Abstract: A reflective screen includes: a substrate having a first refractive index; and a periodic structure provided on a major surface of the substrate and including a periodic film which has a period ? and is made of a material having a second refractive index that is higher than the first refractive index. The period ? is not less than 400/(N+1) nm and not more than 680/(N?1) nm, where N is an equivalent refractive index of the periodic film.Type: ApplicationFiled: March 19, 2009Publication date: October 1, 2009Inventors: Naotada OKADA, Kazuo HORIUCHI, Haruhiko OKUMURA, Takashi SASAKI
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Publication number: 20090201225Abstract: A display apparatus includes a light-flux-generating section configured to generate a light flux containing image information; a light-flux-controlling section configured to control the light flux and making the light flux come toward a head of an observer, and an image-taking section configured to take an image of the observer. At least one of the light-flux-generating section and the light-flux-controlling section include a movable unit in which at least one of position and focus of the light flux can be adjusted with the observer watching the taken image by the image-taking section.Type: ApplicationFiled: January 8, 2009Publication date: August 13, 2009Applicant: Kabushiki Kaisha ToshibaInventors: Naotada OKADA, Kazuo Horiuchi, Haruhiko Okumura, Takashi Sasaki
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Patent number: 7573193Abstract: An optical device includes a first waveguide layer in which multiple-beam interference occurs, a second waveguide layer which includes a back surface facing the first waveguide layer and a front surface as a light output surface, and a diffraction grating which is arranged on a back side of the second waveguide layer and faces the first waveguide layer, wherein a grating constant of the diffraction grating is defined such that a first-order diffracted light emerges from the second waveguide layer, the first-order diffracted light being generated when a light component having a highest intensity of light which propagates in an in-plane direction while causing multiple reflection in the first waveguide layer enters the diffraction grating.Type: GrantFiled: November 10, 2005Date of Patent: August 11, 2009Assignees: Toshiba Matsushita Display Technology Co., Ltd., Kabushiki Kaisha ToshibaInventors: Satoshi Okutani, Tsuyoshi Uemura, Hirofumi Kubota, Naotada Okada, Junichi Tonotani, Keiji Suzuki, Hideki Ookawa
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Publication number: 20090153962Abstract: A head-up display optical film includes: a first optical layer configured to convert the polarization plane of incident light by 90 degrees; a second optical layer configured to convert the polarization plane of incident light by 90 degrees; and an intermediate optical layer sandwiched between the first optical layer and the second optical layer and having a refractive index that is different from the refractive index of the first optical layer and from the refractive index of the second optical layer.Type: ApplicationFiled: November 26, 2008Publication date: June 18, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Naotada OKADA, Kazuo Horiuchi, Haruhiko Okumura, Takashi Sasaki
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Publication number: 20090135374Abstract: A display device includes: a light source configured to generate a coherent light beam; and an optical plate including a plurality of microlenses arranged with a period larger than the diameter of the light beam, the optical plate being configured to control the divergence angle of the light beam.Type: ApplicationFiled: November 26, 2008Publication date: May 28, 2009Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kazuo HORIUCHI, Naotada Okada, Haruhiko Okumura, Takashi Sasaki
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Patent number: 7537371Abstract: The backlight device includes a plurality of packages, and a light guide plate. The package includes a housing for package, and a plurality of light sources. The housing for package includes a tubular part having a wall surrounding the circumference, a bottom wall provided at one end of the tubular part, and a passing part provided at the other end of the tubular part for passing the light from inside to outside of the tubular part. The plurality of light sources are contained in the housing for package and disposed in the bottom wall, and emit light. The plurality of packages are arrayed in one direction. At least part of the layout of light sources relative to the incident plane is different from mutually adjacent packages.Type: GrantFiled: December 28, 2007Date of Patent: May 26, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Naotada Okada, Toshitake Kitagawa
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Publication number: 20090046220Abstract: A backlight for a liquid crystal display device includes a plurality of point light sources 1 arranged linearly, a light guide plate 3 having a light incident surface 3a, a reflection surface 3b and a light emitting surface 3c for emitting the light reflected by the reflection surface 3b. A light scattering pattern 31 is formed on the reflection surface 3b. A light control pattern 32 is formed on the reflection surface 3b at almost entire portions except for the light scattering pattern 31 is formed for reflecting the light introduced and for outputting from the light emitting surface 3c. A pattern less area is formed on the reflection surface 3b at a boundary portion between the light scattering pattern 31 and the light control pattern 32.Type: ApplicationFiled: January 31, 2007Publication date: February 19, 2009Applicants: HARISON TOSHIBA LIGHTING CORPORATION, KABUSHIKI KAISHA TOSHIBAInventors: Ryuji Tsuchiya, Hirozumi Makamura, Naotada Okada, Toshitake Kitagawa
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Publication number: 20080315074Abstract: An array-type light receiving device includes a first light collector, a second light collector configured to receive light collected by the first light collector, and a light receiver configured to receive light collected by the second light collector. The first light collector has a spherical shape, the second light collector has a high refractive index portion and a low refractive index portion, and the high refractive index portion has one of a cylindrical shape and a polygonal prismatic shape.Type: ApplicationFiled: June 16, 2008Publication date: December 25, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yusaku KONNO, Naotada OKADA
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Patent number: 7410614Abstract: An optical waveguide type iontophoresis sensor chip has a substrate having a first hinged plate and a second hinged plate, an optical waveguide plate connected to the first hinged plate and positioned over a first opening delineated in the first hinged plate, and a gel layer fixed on the second hinged plate and covering a second opening delineated in the second hinged plate and configured to contact with the optical waveguide plate through the first opening in case that the substrate is folded.Type: GrantFiled: July 26, 2004Date of Patent: August 12, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Kenichi Uchiyama, Ikuo Uematsu, Kayoko Oomiya, Ichiro Tono, Hideo Eto, Isao Kishimoto, Naotada Okada, Masami Hirata
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Publication number: 20080165551Abstract: The backlight device includes a plurality of packages, and a light guide plate. The package includes a housing for package, and a plurality of light sources. The housing for package includes a tubular part having a wall surrounding the circumference, a bottom wall provided at one end of the tubular part, and a passing part provided at the other end of the tubular part for passing the light from inside to outside of the tubular part. The plurality of light sources are contained in the housing for package and disposed in the bottom wall, and emit light. The plurality of packages are arrayed in one direction. At least part of the layout of light sources relative to the incident plane is different from mutually adjacent packages.Type: ApplicationFiled: December 28, 2007Publication date: July 10, 2008Inventors: Naotada Okada, Toshitake Kitagawa
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Patent number: 7375463Abstract: An optical device includes a first waveguide layer in which multiple-beam interference occurs, a second wavelength layer which includes a back surface facing the first waveguide layer and a front surface as a light output surface, and an outcoupling layer which is disposed on a back side of the second waveguide layer and faces the first wave guide layer, wherein the outcoupling layer includes a first portion as a layer with light transmission property and second portions which are dispersed in the first portion and differ in optical property from the first portion, and wherein an array of the second portions forms a triangular lattice.Type: GrantFiled: November 9, 2005Date of Patent: May 20, 2008Assignees: Kabushiki Kaisha Toshiba, Toshiba Matsushita Display Technology Co., Ltd.Inventors: Tsuyoshi Uemura, Satoshi Okutani, Hirofumi Kubota, Muneharu Akiyoshi, Naotada Okada, Junichi Tonotani
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Patent number: 7345319Abstract: A light emitting device of the present invention includes an LED substrate and a sealing resin portion which seals the LED substrate, the sealing resin portion having a silicone resin having a refractive index n3 to which a fluorescent material having a refractive index n1 and fine particles having a refractive index n2 are added. In the light emitting device, a relationship of n2>n1>n3 holds in the refractive indexes n1 to n3, and a particle size of the fine particles is not more than 1/10 of a wavelength of light emitted from the LED substrate.Type: GrantFiled: August 14, 2006Date of Patent: March 18, 2008Assignee: Kabushiki Kaisha ToshibaInventor: Naotada Okada
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Publication number: 20080030650Abstract: An illumination apparatus includes: a light guide plate composed of a plurality of aligned blocks; and a plurality of light sources, each being provided for one of the blocks and emitting light to the one block. A gap of 0.1 microns or more is formed in at least part of a region between the adjacent blocks. An inside of the gap serves as an air layer.Type: ApplicationFiled: June 29, 2007Publication date: February 7, 2008Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Toshitake Kitagawa, Naotada Okada
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Publication number: 20070290607Abstract: Disclosed is an organic electroluminescent display device, comprising a light-transmitting insulating layer, an organic electroluminescent element including a back side electrode arranged on the back side of the light transmitting insulating layer, a light-transmitting front side electrode interposed between the light-transmitting insulating layer and the back side electrode, and an organic material layer interposed between the front side electrode and the back side electrode and containing a light-emitting layer, and a three-dimensional diffraction element of a two-layer structure arranged on the optical path guiding the light emitted from the light-emitting layer included in the organic material layer to reach the light-transmitting insulating layer, wherein the three-dimensional diffraction element has a cross-sectional structure of a specified dielectric modulation.Type: ApplicationFiled: March 29, 2007Publication date: December 20, 2007Inventors: Naotada OKADA, Junichi Tonotani, Satoshi Okutani, Hiroshi Sano, Tsuyoshi Uemura, Muneharu Akiyoshi, Hirofumi Kubota