Patents by Inventor Akitoshi Kuroda

Akitoshi Kuroda 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).

  • Patent number: 6957892
    Abstract: A projector includes a light-source device, a discharge duct having an air intake port facing the light-source device and a discharge port, an axial fan mounted between the air intake port and the light-source device in an outer casing. The discharge port has an opening area smaller than that of the air intake port and is eccentric to the air intake port. The direction of air flow from the axial fan is inclined with respect to the direction of the discharge of a cooling air from the discharge port. Accordingly, when the cooling air that has cooled a light source lamp is discharged through the discharge duct with the axial fan, the light blocking effect can be increased and the discharge pressure of the cooling air discharged can be increased.
    Type: Grant
    Filed: October 20, 2003
    Date of Patent: October 25, 2005
    Assignee: Seiko Epson Corporation
    Inventor: Akitoshi Kuroda
  • Publication number: 20050030484
    Abstract: The invention provides a projector that can have a light source device, an optical device that modulates, in accordance with image information, beams emitted from the light source device to form an optical image, and an external case that accommodates the light source device and the optical device. The projector can enlarge and project the optical image formed by the optical device. The projector can include leg portions that are disposed so as to be extendable from and retractable to an outer peripheral surface of the external case to adjust the projection position of the enlarged and projected optical image, an intake opening formed in the surface of the external case disposed with the leg portions, and an intake fan that is disposed inside the external case near the intake opening and introduces cooling air from the outside of the external case. An intake surface of the intake fan can be disposed at an inclination with respect to the plane of the external case in which the intake opening is formed.
    Type: Application
    Filed: October 20, 2003
    Publication date: February 10, 2005
    Applicant: Seiko Epson Corporation
    Inventor: Akitoshi Kuroda
  • Publication number: 20050024596
    Abstract: According to exemplary embodiments of the present invention, in a projection lens position, adjuster when a part of a dial exposed from an exterior case is rotated downward, a gear is rotated in an R2 direction. A Y-slider is then moved downward (in a Y3 direction). Accordingly, a Y-table is moved downward, as is a projection lens. When the part of the dial exposed from the exterior case is rotated upward, the projection lens is moved upward. When a part of a dial exposed form the exterior case is rotated leftward as seen from a rear side of a projector, the projection lens is moved leftward. In contrast, when the dial is rotated rightward, the projection lens is moved rightward.
    Type: Application
    Filed: July 26, 2004
    Publication date: February 3, 2005
    Applicant: Seiko Epson Corporation
    Inventors: Akitoshi Kuroda, Akira Momose
  • Publication number: 20040189954
    Abstract: A projector 1 includes a light-source device 411, a discharge duct 81 having an air intake port 81A facing the light-source device 411 and a discharge port 81B, an axial fan 82 mounted between the air intake port A and the light-source device 411 in an outer casing 2. The discharge port 81B has an opening area smaller than that of the air intake port 81A and is eccentric to the air intake port 81A. The direction of air flow from the axial fan 82 is inclined with respect to the direction of the discharge of a cooling air A from the discharge port 81B. Accordingly, when the cooling air that has cooled a light source lamp is discharged through the discharge duct 81 with the axial fan 82, the light blocking effect can be increased and the discharge pressure of the cooling air discharged can be increased.
    Type: Application
    Filed: October 20, 2003
    Publication date: September 30, 2004
    Applicant: Seiko Epson Corporation
    Inventor: Akitoshi Kuroda
  • Patent number: 6644817
    Abstract: A power supply unit is formed so as to be divided into first and second power supply blocks, which are disposed on both sides of a projecting lens. This allows the power supply blocks to be efficiently disposed in a projection display device, so that dead space is not easily formed in the projection display device, making it possible to reduce the size of the projection display device. First and second power supply block cooling paths are formed at first and second power supply blocks which are liable to generate heat, respectively. A light modulating system cooling path is formed at a light modulating system disposed at substantially the center of the projection display device. Therefore, even when these component parts are closely disposed in the projection display device of a compact size, proper cooling operations can be carried out, making it possible to cool the entire projection display device more efficiently.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: November 11, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Akitoshi Kuroda, Mutsuya Furuhata
  • Patent number: 6637895
    Abstract: In a projection display provided with an optical unit, a power source unit, an external case to store the optical unit and the power source unit, a suction opening (75) is formed in one end part of the power source unit, a discharge opening (77) is formed in the other end part, and the suction opening (75) is arranged in the vicinity of an air inlet in the external case. Because the suction opening (75) and the discharge opening (77) are provided, the inside of the power source unit can be independently and efficiently cooled, and the optical unit and the power source unit can be arranged closely to each other.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: October 28, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Motoyuki Fujimori, Akitoshi Kuroda, Shinji Haba, Kiyoshi Miyashita, Takeshi Takizawa, Mutsuya Furuhata
  • Patent number: 6568813
    Abstract: The invention provides an air intake on the upper plane of an exterior case which is opened upwards, and a cooling fan for introducing cooling air into the apparatus from the air intake is provided above an electro-optical device. There is no limit on the amount of air introduced, and sufficient cooling air for cooling the electro-optical device can be blown onto the electro-optical device. Accordingly, the electro-optical device can be cooled efficiently, and a cooling structure capable of dealing with high luminance of the light source lamp and reduction in size of the apparatus can be obtained.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: May 27, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Shinji Haba, Akitoshi Kuroda, Motoyuki Fujimori
  • Patent number: 6456012
    Abstract: A projector is provided which is able to facilitate a reduction in size. The projector includes of a lamp information carrier circuit board and a lamp information detection circuit board, and a fuse for determining use and nonuse of a light source lamp. The lamp information carrier circuit board is stacked so as not to overlap the lamp information detection circuit board. For this reason, the lamp information carrier circuit board and the lamp information detection circuit board are stacked close to each other, and the space between the lamp information carrier circuit board and the lamp information detection circuit board can be narrowed.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: September 24, 2002
    Assignee: Seiko Epson Corporation
    Inventor: Akitoshi Kuroda
  • Publication number: 20020131025
    Abstract: A power supply unit is formed so as to be divided into first and second power supply blocks, which are disposed on both sides of a projecting lens. This allows the power supply blocks to be efficiently disposed in a projection display device, so that dead space is not easily formed in the projection display device, making it possible to reduce the size of the projection display device. First and second power supply block cooling paths are formed at first and second power supply blocks which are liable to generate heat, respectively. A light modulating system cooling path is formed at a light modulating system disposed at substantially the center of the projection display device. Therefore, even when these component parts are closely disposed in the projection display device of a compact size, proper cooling operations can be carried out, making it possible to cool the entire projection display device more efficiently.
    Type: Application
    Filed: May 6, 2002
    Publication date: September 19, 2002
    Applicant: Seiko Epson Corporation
    Inventors: Akitoshi Kuroda, Mutsuya Furuhata
  • Patent number: 6409347
    Abstract: In a projection display device, a main board that is substantially perpendicular to a plane defined by optical axes of an optical unit is allowed to stand aside the optical unit. Therefore, if the main board is designed to have a small vertical size, the vertical size, i.e., the thickness of the projection display device, can be reduced. Therefore, unlike the conventional projection display device in which the main board is disposed above the optical unit, the entire device can be reliably reduced in thickness and size regardless of the thickness of the main board.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: June 25, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Akitoshi Kuroda, Toshihiko Nakazawa, Takeshi Takizawa, Mutsuya Furuhata, Fumio Koyama
  • Patent number: 6402324
    Abstract: A power supply unit is formed so as to be divided into first and second power supply blocks, which are disposed on both sides of a projecting lens. This allows the power supply blocks to be efficiently disposed in a projection display device, so that dead space is not easily formed in the projection display device, making it possible to reduce the size of the projection display device. First and second power supply block cooling paths are formed at first and second power supply blocks which are liable to generate heat, respectively. A light modulating system cooling path is formed at a light modulating system disposed at substantially the center of the projection display device. Therefore, even when these component parts are closely disposed in the projection display device of a compact size, proper cooling operations can be carried out, making it possible to cool the entire projection display device more efficiently.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: June 11, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Akitoshi Kuroda, Mutsuya Furuhata
  • Patent number: 6390627
    Abstract: A projection display device is provided that is capable of having a small size and may be thin. The device consists of an outer case which opposes a set-up surface and a projection angle adjusting mechanism for adjusting a projection angle by changing the angle of the outer case with regard to the set-up surface. Since the projection angle adjusting mechanism is independently mounted on an opposing surface of the lower case opposing the set-up surface, a space for accommodating the projection angle adjusting mechanism within the device can be omitted.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: May 21, 2002
    Assignee: Seiko Epson Corporation
    Inventor: Akitoshi Kuroda
  • Patent number: 6364492
    Abstract: In a projection display provided with an optical unit, a power source unit, an external case to store the optical unit and the power source unit, a suction opening (75) is formed in one end part of the power source unit, a discharge opening (77) is formed in the other end part, and the suction opening (75) is arranged in the vicinity of an air inlet in the external case. Because the suction opening (75) and the discharge opening (77) are provided, the inside of the power source unit can be independently and efficiently cooled, and the optical unit and the power source unit can be arranged closely to each other.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: April 2, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Motoyuki Fujimori, Akitoshi Kuroda, Shinji Haba, Kiyoshi Miyashita, Takeshi Takizawa, Mutsuya Furuhata
  • Publication number: 20020021415
    Abstract: In a projection display provided with an optical unit, a power source unit, an external case to store the optical unit and the power source unit, a suction opening (75) is formed in one end part of the power source unit, a discharge opening (77) is formed in the other end part, and the suction opening (75) is arranged in the vicinity of an air inlet in the external case. Because the suction opening (75) and the discharge opening (77) are provided, the inside of the power source unit can be independently and efficiently cooled, and the optical unit and the power source unit can be arranged closely to each other.
    Type: Application
    Filed: October 26, 2001
    Publication date: February 21, 2002
    Applicant: Seiko Epson Corporation
    Inventors: Motoyuki Fujimori, Akitoshi Kuroda, Shinji Haba, Kiyoshi Miyashita, Takeshi Takizawa, Mutsuya Furuhata
  • Patent number: 6302543
    Abstract: A projector, which has a main body and a plurality of feet protruding from the main body to support the main body, includes a first adjuster that adjusts stepwise the amount of protrusion of at least one of the plurality of feet, and a second adjuster that infinitely and finely adjusts the amount of protrusion of at least one of the plurality of feet. The position of a projection image of the projector can be easily and speedily adjusted by coarsely adjusting the amount of protrusion of the foot by the first adjuster, and then making fine adjustment by the second adjuster.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: October 16, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Jun Arai, Shogo Kurosawa, Motoyuki Fujimori, Akitoshi Kuroda, Shinji Haba, Kiyoshi Miyashita
  • Patent number: 6203158
    Abstract: A projection display device capable of improving cooling efficiency of the power unit includes a light source lamp unit, a projection lens unit, an exhaust fan provided near the light source lamp unit for ventilating an outer case, and a ventilating path provided inside the power unit. A suction fan is provided at the inlet of the ventilating path which is connected to the cooling air intake port through a duct cover to directly conduct fresh air into the ventilating path. Because the interior of the power unit is cooled by fresh air which is cooler than the air inside the outer case, cooling efficiency is enhanced.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: March 20, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Mutsuya Furuhata, Takeshi Takizawa, Motoyuki Fujimori, Akitoshi Kuroda, Shinji Haba, Kiyoshi Miyashita
  • Patent number: D437337
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: February 6, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Mugio Kawasaki, Akitoshi Kuroda
  • Patent number: D502486
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: March 1, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Mugio Kawasaki, Akira Momose, Akitoshi Kuroda
  • Patent number: RE38006
    Abstract: A projection display device projector capable of improving cooling efficiency of the power unit includes a light source lamp unit, a projection lens unit, an exhaust fan provided near the light source lamp unit for ventilating an outer case, and a ventilating path provided inside the power unit. A suction fan is provided at the inlet of the ventilating path which is connected to the cooling air intake port through a duct cover to directly conduct fresh air into the ventilating path. Because the interior of the power unit is cooled by fresh air which is cooler than the air inside the outer case, cooling efficiency is enhanced.
    Type: Grant
    Filed: September 13, 2001
    Date of Patent: February 25, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Mutsuya Furuhata, Takeshi Takizawa, Motoyuki Fujimori, Akitoshi Kuroda, Shinji Haba, Kiyoshi Miyashita
  • Patent number: D498250
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: November 9, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Mugio Kawasaki, Akira Momose, Akitoshi Kuroda