Patents by Inventor Keisuke Sakagami
Keisuke Sakagami 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: 9651851Abstract: An advantage of some aspects of the invention is to provide a light source device and a projector which can acquire a type of a light source. A light source device includes a light source which emits light; and light source housing which accommodates the light source therein. The light source housing includes an attaching unit which can attach a conducting member having conductivity to a surface of the light source housing, and the conducting member is attached to the attaching unit according to the type of the light source. Accordingly, it is possible to acquire the type of the light source based on the presence or absence of the conducting member electrically connected to the terminal of a device to which the light source device is attached, independent of the temperature of the light source device.Type: GrantFiled: March 18, 2014Date of Patent: May 16, 2017Assignee: SEIKO EPSON CORPORATIONInventors: Katsunori Tanaka, Toshihiko Nagumo, Takuya Hatano, Keisuke Sakagami
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Publication number: 20150362829Abstract: An advantage of some aspects of the invention is to provide a light source device and a projector which can acquire a type of a light source. A light source device includes a light source which emits light; and light source housing which accommodates the light source therein. The light source housing includes an attaching unit which can attach a conducting member having conductivity to a surface of the light source housing, and the conducting member is attached to the attaching unit according to the type of the light source. Accordingly, it is possible to acquire the type of the light source based on the presence or absence of the conducting member electrically connected to the terminal of a device to which the light source device is attached, independent of the temperature of the light source device.Type: ApplicationFiled: March 18, 2014Publication date: December 17, 2015Inventors: Katsunori TANAKA, Toshihiko NAGUMO, Takuya HATANO, Keisuke SAKAGAMI
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Patent number: 9052581Abstract: A light source device including an arc tube having a light emission portion containing electrodes, a cooling channel having a downstream part branched into first and second channels to guide air toward the light emission portion via one of the channels, a rotational member disposed within the cooling channel and rotatable around a rotation shaft by gravity, and configured to switch cooling to the first or second channel depending on a position of the light source device, and a duct that forms apart of the cooling channel. The width of the rotational member decreases from a remote end toward the rotation shaft. The rotation shaft is disposed on one end of the rotational member corresponding to a side opposite a light emission side of the duct. The duct is shaped such that the cooling channel width decreases toward the side opposite the light emission side.Type: GrantFiled: August 26, 2014Date of Patent: June 9, 2015Assignee: Seiko Epson CorporationInventors: Masahiro Saito, Keisuke Sakagami, Takahiro Miyata
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Publication number: 20140362351Abstract: Alight source device including an arc tube having a light emission portion containing electrodes, a cooling channel having a downstream part branched into first and second channels to guide air toward the light emission portion via one of the channels, a rotational member disposed within the cooling channel and rotatable around a rotation shaft by gravity, and configured to switch cooling to the first or second channel depending on a position of the light source device, and a duct that forms apart of the cooling channel. The width of the rotational member decreases from a remote end toward the rotation shaft. The rotation shaft is disposed on one end of the rotational member corresponding to a side opposite a light emission side of the duct. The duct is shaped such that the cooling channel width decreases toward the side opposite the light emission side.Type: ApplicationFiled: August 26, 2014Publication date: December 11, 2014Inventors: Masahiro Saito, Keisuke Sakagami, Takahiro Miyata
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Patent number: 8857998Abstract: A light source device includes: a light emission portion; a cooling channel configured to guide air toward the light emission portion; a rotational member disposed within the cooling channel in such a condition as to be rotatable around a predetermined rotation shaft by gravity, and configured to switch the cooling channel to a first channel branched from the cooling channel in the downstream when the light source device is set in a first position, and to a second channel different from the first channel when the light source device is set in a second position, wherein a position of the center of gravity of the rotational member is located at a position shifted from the center between the rotation shaft and an end of the rotational member away from the rotation shaft toward the end.Type: GrantFiled: February 25, 2011Date of Patent: October 14, 2014Assignee: Seiko Epson CorporationInventors: Masahiro Saito, Keisuke Sakagami, Takahiro Miyata
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Patent number: 8752968Abstract: A projector includes: alight source; a light modulation device configured to modulate light emitted from the light source according to image information; a projection lens configured to project the light modulated by the light modulation device; a holding unit that holds the projection lens; an external housing that accommodates the projection lens and the holding unit; and a clamping portion that projects from the inner surface of the external housing and clamps the projection lens or the holding unit in a direction substantially perpendicular to the optical axis of the projection lens.Type: GrantFiled: March 5, 2012Date of Patent: June 17, 2014Assignee: Seiko Epson CorporationInventors: Masahiro Saito, Keisuke Sakagami, Yukihiro Horiko
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Publication number: 20120242966Abstract: A projector includes: alight source; a light modulation device configured to modulate light emitted from the light source according to image information; a projection lens configured to project the light modulated by the light modulation device; a holding unit that holds the projection lens; an external housing that accommodates the projection lens and the holding unit; and a clamping portion that projects from the inner surface of the external housing and clamps the projection lens or the holding unit in a direction substantially perpendicular to the optical axis of the projection lens.Type: ApplicationFiled: March 5, 2012Publication date: September 27, 2012Applicant: Seiko Epson CorporationInventors: Masahiro Saito, Keisuke Sakagami, Yukihiro Horiko
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Publication number: 20110216285Abstract: Alight source device includes: a light emission portion; a cooling channel configured to guide air toward the light emission portion; a rotational member disposed within the cooling channel in such a condition as to be rotatable around a predetermined rotation shaft by gravity, and configured to switch the cooling channel to a first channel branched from the cooling channel in the downstream when the light source device is set in a first position, and to a second channel different from the first channel when the light source device is set in a second position, wherein a position of the center of gravity of the rotational member is located at a position shifted from the center between the rotation shaft and an end of the rotational member away from the rotation shaft toward the end.Type: ApplicationFiled: February 25, 2011Publication date: September 8, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Masahiro Saito, Keisuke Sakagami, Takahiro Miyata
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Patent number: 7997741Abstract: A projector includes a light source device, a optical modulator which modulates luminous flux emitted from the light source device according to image information, a projection optical device which enlarges and projects the luminous flux modulated in the optical modulator, and an outer casing which houses the light source device, the optical modulator and the projection optical device thereinside, in which the outer casing has a ceiling surface and a bottom surface intersecting with respect to the vertical direction and a side surface connecting to the ceiling surface and the bottom surface, in which a concave portion which is recessed toward the inside is formed at the bottom surface side in the side surface, and in which a first connection terminal group connected to an external device through connection cables is arranged at a bottom portion of the concave portion in an exposed state.Type: GrantFiled: January 21, 2009Date of Patent: August 16, 2011Assignee: Seiko Epson CorporationInventors: Kunihisa Nakamura, Keisuke Sakagami, Toru Kurihara, Wataru Kitahara
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Publication number: 20090185146Abstract: A projector includes a light source device, a optical modulator which modulates luminous flux emitted from the light source device according to image information, a projection optical device which enlarges and projects the luminous flux modulated in the optical modulator, and an outer casing which houses the light source device, the optical modulator and the projection optical device thereinside, in which the outer casing has a ceiling surface and a bottom surface intersecting with respect to the vertical direction and a side surface connecting to the ceiling surface and the bottom surface, in which a concave portion which is recessed toward the inside is formed at the bottom surface side in the side surface, and in which a first connection terminal group connected to an external device through connection cables is arranged at a bottom portion of the concave portion in an exposed state.Type: ApplicationFiled: January 21, 2009Publication date: July 23, 2009Applicant: Seiko Epson CorporationInventors: Kunihisa Nakamura, Keisuke Sakagami, Toru Kurihara, Wataru Kitahara
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Patent number: 6031308Abstract: A geared motor is provided. A through hole formed in a base passes a rotor shaft. An annular guide rim to guide a carrier and a cylindrical stationary gear are integrally and concentrically formed on the base which seals an open end of a small motor. A guide to guide the rotation of a movable gear is provided at the top end of the stationary gear. The gears making up the geared motor are disposed in a compact arrangement with high accuracy.Type: GrantFiled: December 30, 1997Date of Patent: February 29, 2000Assignee: Seiko Epson CorporationInventors: Satoshi Kinoshita, Keisuke Sakagami
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Patent number: 5988818Abstract: A projector for separating white light into three primary colors, forming images with liquid crystal light valves, mixing these images, and projecting an enlarged picture of the mixed images with a projection lens. The projector includes an optical unit having a light source, a plurality of dichroic mirrors for separating the white light into blue, green, and red beams, respective liquid crystal light valves forming images of the blue, green, and red colors. The optical unit has a chassis with a rigid center portion at which one of the liquid crystal light valves is mounted, the other two light valves being mounted symmetrically with respect thereto. An adjustment mechanism is provided for matching pixels of the second and third color valves with those of the first color valve. The red color liquid crystal light valve is disposed midway between the blue and green color liquid crystal light valves and a cooling fan is disposed below the red color liquid crystal light valve.Type: GrantFiled: February 6, 1997Date of Patent: November 23, 1999Assignee: Seiko Epson CorporationInventors: Motoyuki Fujimori, Toshiaki Hashizume, Kenji Iguchi, Keisuke Sakagami, Kiichi Okumura
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Patent number: 5651599Abstract: A projector for separating white light into three primary colors, forming images with liquid crystal light valves, mixing these images, and projecting an enlarged picture of the mixed images with a projection lens. The projector includes an optical unit having a light source, a plurality of dichroic mirrors for separating the white light into blue, green, and red beams, respective liquid crystal light valves forming images of the blue, green, and red colors. The optical unit has a chassis with a rigid center portion at which one of the liquid crystal light valves is mounted, the other two light valves being mounted symmetrically with respect thereto. An adjustment mechanism is provided for matching pixels of the second and third color valves with those of the first color valve. The red color liquid crystal light valve is disposed midway between the blue and green color liquid crystal light valves and a cooling fan is disposed below the red color liquid crystal light valve.Type: GrantFiled: February 24, 1995Date of Patent: July 29, 1997Assignee: Seiko Epson CorporationInventors: Motoyuki Fujimori, Toshiaki Hashizume, Kenji Iguchi, Keisuke Sakagami, Kiichi Okumura
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Patent number: 5418586Abstract: A projector for separating white light into three primary colors, forming images with liquid crystal light valves, mixing these images, and projecting an enlarged picture of the mixed images with a projection lens. The projector includes an optical unit having a light source, a plurality of dichroic mirrors for separating the white light into blue, green, and red beams, respective liquid crystal light valves forming images of the blue, green, and red colors. The optical unit has a chassis with a rigid center portion at which one of the liquid crystal light valves is mounted, the other two light valves being mounted symmetrically with respect thereto. An adjustment mechanism is provided for matching pixels of the second and third color valves with those of the first color valve. The red color liquid crystal light valve is disposed midway between the blue and green color liquid crystal light valves and a cooling fan is disposed below the red color liquid crystal light valve.Type: GrantFiled: October 21, 1992Date of Patent: May 23, 1995Assignee: Seiko Epson CorporationInventors: Motoyuki Fujimori, Toshiaki Hashizume, Kenji Iguchi, Keisuke Sakagami, Kiichi Okumura
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Patent number: D588619Type: GrantFiled: March 6, 2008Date of Patent: March 17, 2009Assignee: Seiko Epson CorporationInventors: Genta Kawabe, Isao Sakamaki, Kunihisa Nakamura, Keisuke Sakagami, Toru Kurihara
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Patent number: D588620Type: GrantFiled: March 6, 2008Date of Patent: March 17, 2009Assignee: Seiko Epson CorporationInventors: Genta Kawabe, Isao Sakamaki, Kunihisa Nakamura, Keisuke Sakagami, Toru Kurihara
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Patent number: D613326Type: GrantFiled: March 30, 2009Date of Patent: April 6, 2010Assignee: Seiko Epson CorporationInventors: Genta Kawabe, Isao Sakamaki, Tsuyoshi Arai, Keisuke Sakagami, Sei Nakanishi, Yasushi Tateno
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Patent number: D617822Type: GrantFiled: April 8, 2009Date of Patent: June 15, 2010Assignee: Seiko Epson CorporationInventors: Genta Kawabe, Isao Sakamaki, Tsuyoshi Arai, Keisuke Sakagami, Sei Nakanishi, Yasushi Tateno
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Patent number: D628227Type: GrantFiled: January 25, 2010Date of Patent: November 30, 2010Assignee: Seiko Epson CorporationInventors: Genta Kawabe, Isao Sakamaki, Tsuyoshi Arai, Keisuke Sakagami, Sei Nakanishi, Yasushi Tateno