Patents by Inventor Prapas Charoensilputthakun
Prapas Charoensilputthakun 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: 8550731Abstract: A blade drive device includes: a board including an optical path opening; a blade including a plurality of openings; a first drive source that swings the blade to move toward and away from the optical path opening; and a second drive source that changes a position of a swinging fulcrum of the blade relative to the board. The first drive source includes a first rotor and a first transmitting portion transmitting a rotation of the first rotor to the blade. The second drive source includes a second rotor and a second transmitting portion transmitting a rotation of the second rotor to the blade. The blade includes a cam slot engaging the first transmitting portion and a fitting hole into which the second transmitting portion slidably fits.Type: GrantFiled: March 22, 2011Date of Patent: October 8, 2013Assignee: Seiko Precision Inc.Inventors: Phichet Numnual, Prapas Charoensilputthakun
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Patent number: 8368989Abstract: A light amount adjusting device includes: a board including an opening; a linear moving blade linearly and movably supported by the board; and a swinging blade swingably supported by the board, wherein: the linear moving blade and the swinging blade are receded from the opening to form a fully opened state; the linear moving blade covers the opening to form a fully closed state; and the swinging blade has a small aperture opening with a diameter smaller than a diameter of the opening, and causes the small aperture opening and the opening to be overlapped with each other to form a small aperture state.Type: GrantFiled: March 2, 2010Date of Patent: February 5, 2013Assignee: Seiko Precision Inc.Inventors: Phichet Numnual, Takashi Nakano, Prapas Charoensilputthakun
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Patent number: 8254008Abstract: A blade drive device includes: a board including an optical path opening; first and second blades cooperatively defining an amount of light passing through the optical path opening to a given amount of light. The first blade includes a first opening. The second blade includes: a first cutout portion defining the amount of light in cooperation with the first opening; and a second cutout portion defining the amount of light in cooperation with the first opening. The second cutout portion overlaps the first blade when the first cutout portion and the first opening cooperatively define the amount of light.Type: GrantFiled: March 11, 2011Date of Patent: August 28, 2012Assignee: Seiko Precision Inc.Inventors: Worachai Jaitham, Prapas Charoensilputthakun
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Patent number: 8047733Abstract: A blade drive device includes: a board having a shutter opening; a blade for adjusting an amount of light entering the shutter opening; and a transmitting member for transmitting a drive force to the blade. The transmitting member includes a drive pin swinging about a given support point. The blade has a first cam slot engaged with the drive pin and swinging about a given support point in conjunction with a swinging of the drive pin. The first cam slot includes a first permitting area and a first restricting area. The blade is permitted to swing when the drive pin is located in the first permitting area. The blade is restricted from swinging when the drive pin is located in the first restricting area.Type: GrantFiled: November 18, 2009Date of Patent: November 1, 2011Assignee: Seiko Precision Inc.Inventors: Phichet Numnual, Takashi Nakano, Prapas Charoensilputthakun, Noppadol Ngernping
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Publication number: 20110170852Abstract: A blade drive device includes: a board including an optical path opening; a blade including a plurality of openings; a first drive source that swings the blade to move toward and away from the optical path opening; and a second drive source that changes a position of a swinging fulcrum of the blade relative to the board. The first drive source includes a first rotor and a first transmitting portion transmitting a rotation of the first rotor to the blade. The second drive source includes a second rotor and a second transmitting portion transmitting a rotation of the second rotor to the blade. The blade includes a cam slot engaging the first transmitting portion and a fitting hole into which the second transmitting portion slidably fits.Type: ApplicationFiled: March 22, 2011Publication date: July 14, 2011Applicant: SEIKO PRECISION INC.Inventors: Phichet Numnual, Prapas Charoensilputthakun
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Publication number: 20110164298Abstract: A blade drive device includes: a board including an optical path opening; first and second blades cooperatively defining an amount of light passing through the optical path opening to a given amount of light. The first blade includes a first opening. The second blade includes: a first cutout portion defining the amount of light in corporation with the first opening; and a second cutout portion defining the amount of light in corporation with the first opening. The second cutout portion overlaps the first blade when the first cutout portion and the first opening cooperatively define the amount of light.Type: ApplicationFiled: March 11, 2011Publication date: July 7, 2011Applicant: SEIKO PRECISION INC.Inventors: Worachai Jaitham, Prapas Charoensilputthakun
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Publication number: 20100157405Abstract: A light amount adjusting device includes: a board including an opening; a linear moving blade linearly and movably supported by the board; and a swinging blade swingably supported by the board, wherein: the linear moving blade and the swinging blade are receded from the opening to form a fully opened state; the linear moving blade covers the opening to form a fully closed state; and the swinging blade has a small aperture opening with a diameter smaller than a diameter of the opening, and causes the small aperture opening and the opening to be overlapped with each other to form a small aperture state.Type: ApplicationFiled: March 2, 2010Publication date: June 24, 2010Applicant: SEIKO PRECISION INC.Inventors: Phichet Numnual, Takashi Nakano, Prapas Charoensilputthakun
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Publication number: 20100074612Abstract: A blade drive device includes: a board having a shutter opening; a blade for adjusting an amount of light entering the shutter opening; and a transmitting member for transmitting a drive force to the blade. The transmitting member includes a drive pin swinging about a given support point. The blade has a first cam slot engaged with the drive pin and swinging about a given support point in conjunction with a swinging of the drive pin. The first cam slot includes a first permitting area and a first restricting area. The blade is permitted to swing when the drive pin is located in the first permitting area. The blade is restricted from swinging when the drive pin is located in the first restricting area.Type: ApplicationFiled: November 18, 2009Publication date: March 25, 2010Applicant: SEIKO PRECISION INC.Inventors: Phichet NUMNUAL, Takashi NAKANO, Prapas CHAROENSILPUTTHAKUN, Noppadol NGERNPING