Patents by Inventor Toshizo Nishi
Toshizo Nishi 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: 11460757Abstract: A projector according to the present disclosure includes a light source device, a plurality of light modulation devices, a combining prism, a support member, and a projection optical system. A first light modulation device includes a first light modulation panel having a first incident side substrate, a first exit side substrate, and a liquid crystal layer, a frame body which has a first opening part, and surrounds a side surface of the first incident side substrate and a side surface of the first exit side substrate, a second incident side substrate opposed to the first incident side substrate in the first opening part, an incident side member fixed to the second incident side substrate and the frame body, a support target member supported by the support member, and a holding member which is made elastically deformable.Type: GrantFiled: August 21, 2020Date of Patent: October 4, 2022Inventors: Tomoaki Miyashita, Toshizo Nishi, Takanori Fukuyama, Kazunari Sakamoto, Suguru Uchiyama
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Publication number: 20210055640Abstract: A projector according to the present disclosure includes a light source device, a plurality of light modulation devices, a combining prism, a support member, and a projection optical system. A first light modulation device includes a first light modulation panel having a first incident side substrate, a first exit side substrate, and a liquid crystal layer, a frame body which has a first opening part, and surrounds a side surface of the first incident side substrate and a side surface of the first exit side substrate, a second incident side substrate opposed to the first incident side substrate in the first opening part, an incident side member fixed to the second incident side substrate and the frame body, a support target member supported by the support member, and a holding member which is made elastically deformable.Type: ApplicationFiled: August 21, 2020Publication date: February 25, 2021Inventors: Tomoaki MIYASHITA, Toshizo NISHI, Takanori FUKUYAMA, Kazunari SAKAMOTO, Suguru UCHIYAMA
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Patent number: 10747043Abstract: Projector including a light source device, an image forming device, and a cooling device, image forming device includes a light modulation device having a liquid crystal panel, incident side polarization plate and attachment member, a liquid crystal panel includes a panel main body having a modulation area having a rectangular shape, and a frame, cooling device includes a first circulation device that makes a liquid refrigerant flow through a first flow channel included in frame along one of long sides and short sides in modulation area, the incident side polarization plate has a polarization plate main body and a light transmissive substrate, attachment member includes clamp-holding members adapted to clamp-hold the incident side polarization plate, and a support member, clamp-holding members are disposed at positions corresponding respectively to the long sides, and the support member is connected to the areas respectively along the short sides on the frame surface.Type: GrantFiled: October 29, 2018Date of Patent: August 18, 2020Assignee: SEIKO EPSON CORPORATIONInventors: Toshizo Nishi, Tomoaki Miyashita
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Patent number: 10678121Abstract: A projector includes a light source unit having a light source and a first cooling section adapted to transmit heat of the light source to a first liquid refrigerant circulating, an optical unit having a light modulation device and a second cooling section adapted to transmit heat of the light modulation device to a second liquid refrigerant, a cooling unit adapted to cool the first liquid refrigerant and the second liquid refrigerant, a first connection member connecting the light source unit and the cooling unit to each other, and a second connection member connecting the optical unit and the cooling unit to each other, and at least one of a set of the light source unit and the cooling unit, and a set of the optical unit and the cooling unit is configured to detachably be attached to each other.Type: GrantFiled: October 17, 2018Date of Patent: June 9, 2020Assignee: SEIKO EPSON CORPORATIONInventors: Kentaro Nakamura, Kaname Nagatani, Takahiro Miyata, Toshizo Nishi
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Publication number: 20190129237Abstract: Projector including a light source device, an image forming device, and a cooling device, image forming device includes a light modulation device having a liquid crystal panel, incident side polarization plate and attachment member, a liquid crystal panel includes a panel main body having a modulation area having a rectangular shape, and a frame, cooling device includes a first circulation device that makes a liquid refrigerant flow through a first flow channel included in frame along one of long sides and short sides in modulation area, the incident side polarization plate has a polarization plate main body and a light transmissive substrate, attachment member includes clamp-holding members adapted to clamp-hold the incident side polarization plate, and a support member, clamp-holding members are disposed at positions corresponding respectively to the long sides, and the support member is connected to the areas respectively along the short sides on the frame surface.Type: ApplicationFiled: October 29, 2018Publication date: May 2, 2019Applicant: SEIKO EPSON CORPORATIONInventors: Toshizo NISHI, Tomoaki MIYASHITA
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Publication number: 20190116343Abstract: A projector includes a light source unit having a light source and a first cooling section adapted to transmit heat of the light source to a first liquid refrigerant circulating, an optical unit having a light modulation device and a second cooling section adapted to transmit heat of the light modulation device to a second liquid refrigerant, a cooling unit adapted to cool the first liquid refrigerant and the second liquid refrigerant, a first connection member connecting the light source unit and the cooling unit to each other, and a second connection member connecting the optical unit and the cooling unit to each other, and at least one of a set of the light source unit and the cooling unit, and a set of the optical unit and the cooling unit is configured to detachably be attached to each other.Type: ApplicationFiled: October 17, 2018Publication date: April 18, 2019Applicant: SEIKO EPSON CORPORATIONInventors: Kentaro NAKAMURA, Kaname NAGATANI, Takahiro MIYATA, Toshizo NISHI
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Patent number: 9897904Abstract: A light source which has a housing accommodating a light source lamp and having an exhaust port, a duct, and a fan are provided. The duct has an inlet facing the exhaust port, a branching part which branches air from the inlet, a duct part extending in a first direction orthogonal to an opening plane of the exhaust port, and a duct part extending in a second direction intersecting with the first direction. The fan is arranged in a position for sucking the air circulating through the duct part. The duct part has a plurality of sidewall parts, an opening, and a mesh.Type: GrantFiled: July 8, 2015Date of Patent: February 20, 2018Assignee: SEIKO EPSON CORPORATIONInventors: Toshizo Nishi, Masahiro Saito, Toshihiko Nagumo
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Patent number: 9835938Abstract: A projector includes an adjustment mechanism adjusting a light axis of the optical member. The adjustment mechanism includes a first member, a second member attached to be movable in a first direction orthogonal to the light axis of the optical member with respect to the first member, a third member holding the optical member and attached to be rotatable around a rotation center axis parallel to the light axis with respect to the second member, a first adjustment portion moving the second member in the first direction with respect to the first member, and a second adjustment portion rotating the third member around the rotation center axis with respect to the second member, and an operation portion of the first adjustment portion and an operation portion of the second adjustment portion are placed at the same side.Type: GrantFiled: January 25, 2017Date of Patent: December 5, 2017Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Saegusa, Masato Kadotani, Toshizo Nishi
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Publication number: 20170227838Abstract: A projector includes an adjustment mechanism adjusting a light axis of the optical member. The adjustment mechanism includes a first member, a second member attached to be movable in a first direction orthogonal to the light axis of the optical member with respect to the first member, a third member holding the optical member and attached to be rotatable around a rotation center axis parallel to the light axis with respect to the second member, a first adjustment portion moving the second member in the first direction with respect to the first member, and a second adjustment portion rotating the third member around the rotation center axis with respect to the second member, and an operation portion of the first adjustment portion and an operation portion of the second adjustment portion are placed at the same side.Type: ApplicationFiled: January 25, 2017Publication date: August 10, 2017Applicant: SEIKO EPSON CORPORATIONInventors: Takashi SAEGUSA, Masato KADOTANI, Toshizo NISHI
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Publication number: 20170108764Abstract: A light source which has a housing accommodating a light source lamp and having an exhaust port, a duct, and a fan are provided. The duct has an inlet facing the exhaust port, a branching part which branches air from the inlet, a duct part extending in a first direction orthogonal to an opening plane of the exhaust port, and a duct part extending in a second direction intersecting with the first direction. The fan is arranged in a position for sucking the air circulating through the duct part. The duct part has a plurality of sidewall parts, an opening, and a mesh.Type: ApplicationFiled: July 8, 2015Publication date: April 20, 2017Applicant: SEIKO EPSON CORPORATIONInventors: Toshizo NISHI, Masahiro SAITO, Toshihiko NAGUMO
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Patent number: 8820938Abstract: A light source device includes: an arc tube having a light emission portion containing a pair of electrodes and configured to emit light by discharges induced between the pair of the electrodes; and a container body that accommodates the arc tube, the container body has a space in which the arc tube is accommodated, and a plurality of openings through that cooling fluids introduced from the outside of the container body are supplied into the space, the plural openings are formed at positions that allow the cooling fluids passing through the openings to collide with each other at a collision position above the light emission portion.Type: GrantFiled: March 23, 2011Date of Patent: September 2, 2014Assignee: Seiko Epson CorporationInventors: Kazuhiro Tanaka, Hiroshi Yamanoi, Michiko Yamasaki, Hiroshi Onodera, Yuichiro Iwama, Toshizo Nishi
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Patent number: 8752966Abstract: A light source device includes a light emitting tube having a light emitting section configured to emit light, a first reflecting member configured to reflect the light emitted from the light emitting section, and a rectifying member disposed between the light emitting section and the first reflecting member, and configured to rectify a cooling fluid configured to cool the light emitting tube, and the rectifying member includes a rectifying surface configured to guide the cooling fluid flowing toward the rectifying member to the light emitting section, and a pair of standing surfaces standing from both ends of the rectifying surface.Type: GrantFiled: September 26, 2011Date of Patent: June 17, 2014Assignee: Seiko Epson CorporationInventors: Toshizo Nishi, Akira Momose, Ryo Okamura, Takahiro Takizawa
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Publication number: 20120075864Abstract: A light source device includes a light emitting tube having a light emitting section configured to emit light, a first reflecting member configured to reflect the light emitted from the light emitting section, and a rectifying member disposed between the light emitting section and the first reflecting member, and configured to rectify a cooling fluid configured to cool the light emitting tube, and the rectifying member includes a rectifying surface configured to guide the cooling fluid flowing toward the rectifying member to the light emitting section, and a pair of standing surfaces standing from both ends of the rectifying surface.Type: ApplicationFiled: September 26, 2011Publication date: March 29, 2012Applicant: Seiko Epson CorporationInventors: Toshizo Nishi, Akira Momose, Ryo Okamura, Takahiro Takizawa
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Patent number: 8132924Abstract: A light source device includes: a light emitting tube; a reflecting mirror; and a tubular member disposed on a forward side of light emission of the reflecting mirror, and surrounding the light emitting tube, the tubular member has a pair of air circulating units communicating inside and outside of the tubular member and adapted to allow introduction of external air from the forward side toward a backward side of the light emission in a vertically symmetrical manner on a center axis of the light emitting tube, inside the air circulating unit there is disposed a air flow guide member, and the air flow guide member is pivoted rotatably around a predetermined rotational axis with respect to the air circulating unit under own weight of the air flow guide member, and rotates to thereby open and block at least a part of a flow passage inside the air circulating unit.Type: GrantFiled: March 31, 2010Date of Patent: March 13, 2012Assignee: Seiko Epson CorporationInventors: Toshizo Nishi, Toshihiko Nagumo, Masahiro Saito
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Publication number: 20110234987Abstract: A light source device includes: an arc tube having a light emission portion containing a pair of electrodes and configured to emit light by discharges induced between the pair of the electrodes; and a container body that accommodates the arc tube, the container body has a space in which the arc tube is accommodated, and a plurality of openings through that cooling fluids introduced from the outside of the container body are supplied into the space, the plural openings are formed at positions that allow the cooling fluids passing through the openings to collide with each other at a collision position above the light emission portion.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Kazuhiro TANAKA, Hiroshi YAMANOI, Michiko YAMASAKI, Hiroshi ONODERA, Yuichiro IWAMA, Toshizo NISHI
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Publication number: 20100253924Abstract: A light source device includes: a light emitting tube; a reflecting mirror; and a tubular member disposed on a forward side of light emission of the reflecting mirror, and surrounding the light emitting tube, the tubular member has a pair of air circulating units communicating inside and outside of the tubular member and adapted to allow introduction of external air from the forward side toward a backward side of the light emission in a vertically symmetrical manner on a center axis of the light emitting tube, inside the air circulating unit there is disposed a air flow guide member, and the air flow guide member is pivoted rotatably around a predetermined rotational axis with respect to the air circulating unit under own weight of the air flow guide member, and rotates to thereby open and block at least a part of a flow passage inside the air circulating unit.Type: ApplicationFiled: March 31, 2010Publication date: October 7, 2010Applicant: Seiko Epson CorporationInventors: Toshizo Nishi, Toshihiko Nagumo, Masahiro Saito
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Patent number: D616482Type: GrantFiled: July 1, 2009Date of Patent: May 25, 2010Assignee: Seiko Epson CorporationInventors: Toshizo Nishi, Hiroshi Kobayashi
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Patent number: D645892Type: GrantFiled: November 15, 2010Date of Patent: September 27, 2011Assignee: Seiko Epson CorporationInventor: Toshizo Nishi