Patents by Inventor Ryoji Katsuma
Ryoji Katsuma 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: 8477421Abstract: A screen allows an image according to light incident in an oblique direction from a predetermined light exiting position to be displayed. The screen includes a screen body having a reflection surface with a plurality of lens elements formed thereon, each of the lens elements reflecting the light incident thereon, a first layer (substrate) disposed on the side of the reflection surface on which the light is incident, and a second layer (air layer) interposed between the screen body and the first layer. The first layer has a refractive index greater than the refractive index of the second layer. The first layer has an angle changing portion formed in at least part of a region through which the light incident thereon passes, the angle changing portion so formed that the thickness thereof continuously increases with distance from the light exiting position.Type: GrantFiled: June 27, 2012Date of Patent: July 2, 2013Assignee: Seiko Epson CorporationInventor: Ryoji Katsuma
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Patent number: 8405905Abstract: A screen on which an image according to light incident thereon is displayed includes a plurality of lens trains on a light-exiting surface from which the light exits, and the plurality of lens trains are provided along a plurality of virtual reference lines extending in respective predetermined directions. Each of the lens trains is formed of a plurality of lens elements from which the light exits. At least some of the plurality of lens elements that form any of the lens trains are so disposed that the lens elements are shifted from the reference line along which the lens train extends. The screen can suppress degradation of a displayed image.Type: GrantFiled: March 5, 2012Date of Patent: March 26, 2013Assignee: Seiko Epson CorporationInventors: Akira Shinbo, Ryoji Katsuma
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Publication number: 20130003174Abstract: A screen allows an image according to light incident in an oblique direction from a predetermined light exiting position to be displayed. The screen includes a screen body having a reflection surface with a plurality of lens elements formed thereon, each of the lens elements reflecting the light incident thereon, a first layer (substrate) disposed on the side of the reflection surface on which the light is incident, and a second layer (air layer) interposed between the screen body and the first layer. The first layer has a refractive index greater than the refractive index of the second layer. The first layer has an angle changing portion formed in at least part of a region through which the light incident thereon passes, the angle changing portion so formed that the thickness thereof continuously increases with distance from the light exiting position.Type: ApplicationFiled: June 27, 2012Publication date: January 3, 2013Applicant: Seiko Epson CorporationInventor: Ryoji Katsuma
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Publication number: 20120229895Abstract: A screen on which an image according to light incident thereon is displayed includes a plurality of lens trains on a light-exiting surface from which the light exits, and the plurality of lens trains are provided along a plurality of virtual reference lines extending in respective predetermined directions. Each of the lens trains is formed of a plurality of lens elements from which the light exits. At least some of the plurality of lens elements that form any of the lens trains are so disposed that the lens elements are shifted from the reference line along which the lens train extends. The screen can suppress degradation of a displayed image.Type: ApplicationFiled: March 5, 2012Publication date: September 13, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Akira SHINBO, Ryoji KATSUMA
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Patent number: 8228603Abstract: A screen includes a plurality of structures arrayed in parallel in at least one direction of a first direction and a second direction perpendicular to the first direction on a reference surface parallel to the first direction and the second direction. The structures are arrayed such that at least one of a distance between central positions of the structures adjacent to each other and a size of the structure changes irregularly in at least one direction, in which the structures are arrayed in parallel, of the first and second directions.Type: GrantFiled: April 12, 2011Date of Patent: July 24, 2012Assignee: Seiko Epson CorporationInventors: Akira Shinbo, Ryoji Katsuma
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Patent number: 8197926Abstract: A screen includes a plurality of concave recesses arranged on a flat surface, wherein the recesses are arranged in such a way that the spacing between adjacent ones of the recesses in the radial direction from a reference point located in the flat surface or a plane extended from the flat surface increase with distance from the reference point.Type: GrantFiled: August 3, 2009Date of Patent: June 12, 2012Assignee: Seiko Epson CorporationInventors: Akira Shinbo, Ryoji Katsuma
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Patent number: 8169697Abstract: A screen unit includes: a rectangular screen; fixing assist members provided on the screen along two opposed sides of the screen; first supporting units fixed to two sides of the screen different from the two opposed sides along which the fixing assist members are provided; second supporting units fixed to the screen via the fixing assist members; a first tensioning unit which applies tension in the direction of separating the first supporting units away from each other; and a second tensioning unit which applies tension in the direction of separating the second supporting units away from each other.Type: GrantFiled: March 4, 2011Date of Patent: May 1, 2012Assignee: Seiko Epson CorporationInventor: Ryoji Katsuma
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Patent number: 8169700Abstract: A reflective screen comprising: a projection surface on which an image light is projected, a plurality of unit structures provided on the projection surface, one of the plurality of unit structures being formed of a concavely curved surface or a convexly curved surface, a first reflection portion that reflects the image light incident thereon toward a preset field of view, the first reflection portion being provided on the concavely curved surface or on the convexly curved surface and a second reflection portion that reflects at least a part of the image light incident thereon toward a region outside the preset field of view, the second reflection portion being provided on the concavely curved surface or on the convexly curved surface.Type: GrantFiled: January 20, 2011Date of Patent: May 1, 2012Assignee: Seiko Epson CorporationInventors: Ryoji Katsuma, Akira Shinbo
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Patent number: 8023186Abstract: A screen that reflects light from a projection apparatus to present a projected image includes: a screen substrate; and a plurality of spherical microlenses disposed on the front side of the screen substrate, wherein the microlenses are arranged along a predetermined first direction on the screen substrate to form lens rows, and adjacent microlenses in each of the lens rows have different radii of curvature.Type: GrantFiled: November 30, 2009Date of Patent: September 20, 2011Assignee: Seiko Epson CorporationInventors: Ryoji Katsuma, Akira Shinbo, Toshiaki Hashizume
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Publication number: 20110222150Abstract: A screen unit includes: a rectangular screen; fixing assist members provided on the screen along two opposed sides of the screen; first supporting units fixed to two sides of the screen different from the two opposed sides along which the fixing assist members are provided; second supporting units fixed to the screen via the fixing assist members; a first tensioning unit which applies tension in the direction of separating the first supporting units away from each other; and a second tensioning unit which applies tension in the direction of separating the second supporting units away from each other.Type: ApplicationFiled: March 4, 2011Publication date: September 15, 2011Applicant: Seiko Epson CorporationInventor: Ryoji Katsuma
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Publication number: 20110194178Abstract: A reflective screen comprising: a projection surface on which an image light is projected, a plurality of unit structures provided on the projection surface, one of the plurality of unit structures being formed of a concavely curved surface or a convexly curved surface, a first reflection portion that reflects the image light incident thereon toward a preset field of view, the first reflection portion being provided on the concavely curved surface or on the convexly curved surface and a second reflection portion that reflects at least a part of the image light incident thereon toward a region outside the preset field of view, the second reflection portion being provided on the concavely curved surface or on the convexly curved surface.Type: ApplicationFiled: January 20, 2011Publication date: August 11, 2011Applicant: Seiko Epson CorporationInventors: Ryoji Katsuma, Akira Shinbo
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Publication number: 20110188114Abstract: A screen includes a plurality of structures arrayed in parallel in at least one direction of a first direction and a second direction perpendicular to the first direction on a reference surface parallel to the first direction and the second direction. The structures are arrayed such that at least one of a distance between central positions of the structures adjacent to each other and a size of the structure changes irregularly in at least one direction, in which the structures are arrayed in parallel, of the first and second directions.Type: ApplicationFiled: April 12, 2011Publication date: August 4, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Akira SHINBO, Ryoji KATSUMA
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Patent number: 7948679Abstract: A screen includes a plurality of structures arrayed in parallel in at least one direction of a first direction and a second direction perpendicular to the first direction on a reference surface parallel to the first direction and the second direction. The structures are arrayed such that at least one of a distance between central positions of the structures adjacent to each other and a size of the structure changes irregularly in at least one direction, in which the structures are arrayed in parallel, of the first and second directions.Type: GrantFiled: March 10, 2009Date of Patent: May 24, 2011Assignee: Seiko Epson CorporationInventors: Akira Shinbo, Ryoji Katsuma
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Publication number: 20110069385Abstract: A screen includes: a screen substrate; a first area disposed on the screen substrate and containing a first main line which has a plurality of first concaves for reflecting light and a first supplementary line which is disposed on the screen substrate at a position adjacent to the first main line and has the same number of second concaves as that of the first concaves formed adjacent to the second concaves, the first main line and the first supplementary line being alternately and repeatedly arranged; and a second area disposed on the screen substrate in a region where an angle of incidence of projection light with respect to the screen substrate becomes larger than in the first area and containing a second main line which has a plurality of third concaves for reflecting light and a second supplementary line which is disposed on the screen substrate at a position adjacent to the second main line and has a larger number of fourth concaves as that of the third concaves formed adjacent to the fourth concaves, thType: ApplicationFiled: September 7, 2010Publication date: March 24, 2011Applicant: Seiko Epson CorporationInventors: Ryoji Katsuma, Akira Shinbo
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Patent number: 7911694Abstract: A screen includes: a screen substrate; a first area disposed on the screen substrate and containing a first main line which has a plurality of first concaves for reflecting light and a first supplementary line which is disposed on the screen substrate at a position adjacent to the first main line and has the same number of second concaves as that of the first concaves formed adjacent to the second concaves, the first main line and the first supplementary line being alternately and repeatedly arranged; and a second area disposed on the screen substrate in a region where an angle of incidence of projection light with respect to the screen substrate becomes larger than in the first area and containing a second main line which has a plurality of third concaves for reflecting light and a second supplementary line which is disposed on the screen substrate at a position adjacent to the second main line and has a larger number of fourth concaves as that of the third concaves formed adjacent to the fourth concaves, thType: GrantFiled: September 7, 2010Date of Patent: March 22, 2011Assignee: Seiko Epson CorporationInventors: Ryoji Katsuma, Akira Shinbo
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Publication number: 20100157424Abstract: A screen that reflects light from a projection apparatus to present a projected image includes: a screen substrate; and a plurality of spherical microlenses disposed on the front side of the screen substrate, wherein the microlenses are arranged along a predetermined first direction on the screen substrate to form lens rows, and adjacent microlenses in each of the lens rows have different radii of curvature.Type: ApplicationFiled: November 30, 2009Publication date: June 24, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Ryoji KATSUMA, Akira SHINBO, Toshiaki HASHIZUME
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Publication number: 20100092734Abstract: A screen includes a plurality of concave recesses arranged on a flat surface, wherein the recesses are arranged in such a way that the spacing between adjacent ones of the recesses in the radial direction from a reference point located in the flat surface or a plane extended from the flat surface increase with distance from the reference point.Type: ApplicationFiled: August 3, 2009Publication date: April 15, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Akira SHINBO, Ryoji KATSUMA
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Publication number: 20090231696Abstract: A screen includes a plurality of structures arrayed in parallel in at least one direction of a first direction and a second direction perpendicular to the first direction on a reference surface parallel to the first direction and the second direction. The structures are arrayed such that at least one of a distance between central positions of the structures adjacent to each other and a size of the structure changes irregularly in at least one direction, in which the structures are arrayed in parallel, of the first and second directions.Type: ApplicationFiled: March 10, 2009Publication date: September 17, 2009Applicant: SEIKO EPSON CORPORATIONInventors: Akira SHINBO, Ryoji KATSUMA
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Patent number: 7188973Abstract: A light source device includes: a light-emitting tube having a light-emitting portion that generates a light beam by an electric discharge between electrodes and a sealing portion provided on both sides of the light-emitting portion; an ellipsoidal reflector having a substantially ellipsoidal reflecting surface and irradiating the light beam irradiated by the light-emitting tube after converging at a predetermined position; a sub-reflection mirror having a reflecting surface opposed to the reflecting surface of the ellipsoidal reflector and covering the front side of the light-emitting tube in the light-irradiation direction to reflect the light beam emitted by the light-emitting tube toward the ellipsoidal reflector; and a transparent member provided in front of the ellipsoidal reflector in the light-irradiation direction to transmit the light beam.Type: GrantFiled: February 23, 2005Date of Patent: March 13, 2007Assignee: Seiko Epson CorporationInventor: Ryoji Katsuma
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Patent number: 7052147Abstract: The invention provides a light source and a projector with sufficiently high luminance and size reduction for related art lamps, an increased lamp lifetime, and reduced noises from a cooling fan. A light source includes a concave mirror which has a reflecting part that reflects light, non-reflecting parts adjacent to this reflecting part, and permeable ports that pass through the non-reflecting parts, and which opens forward; a lamp which is arranged in this concave mirror and emits the light; and a light permeable member which covers the opening part of the concave mirror. The concave mirror includes a mesh arranged in a position where it covers the permeable port, and a protective wall to protect the mesh, which is arranged in a position where direct collision between the mesh and broken pieces of the lamp made by a burst of the lamp is reduced or prevented.Type: GrantFiled: February 18, 2004Date of Patent: May 30, 2006Assignee: Seiko Epson CorporationInventors: Ryoji Katsuma, Motoyuki Fujimori