Patents by Inventor Yuichi Kurosawa
Yuichi Kurosawa 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).
-
Publication number: 20090323208Abstract: A rotary actuator includes a multi-polar magnet, in which north and south poles are alternately arranged in a circumferential direction, the multi-polar magnet being shaped into one of a circular ring and a circular arc member; and a coil body having coils which are provided around the multi-polar magnet to be capable of moving in the circumferential direction of the multi-polar magnet, each of the coils substantially lying on a plane that extends in a radial direction of the multi-polar magnet and orthogonal to the circumferential direction of the multi-polar magnet. The north and south poles of the multi-polar magnet are positioned apart from each other by a predetermined interval in the circumferential direction. Dimensions of each coil are predetermined so that length of each coil in the circumferential direction is associated with the predetermined interval. Predetermined currents are passed through the coils in a properly phased manner.Type: ApplicationFiled: June 22, 2009Publication date: December 31, 2009Applicant: HOYA CORPORATIONInventor: Yuichi KUROSAWA
-
Patent number: 7638231Abstract: A battery case includes a box portion forming a battery chamber in which at least one short-length battery and at least one long-length battery can be selectively accommodated along a lengthwise direction of the box portion through an insertion opening thereof; a battery chamber lid for closing the insertion opening; at least one battery locking lug which is engaged with the long-length battery to lock the long-length battery in the box portion upon the long-length battery being inserted into the box portion; and at least one lock releasing piece which disengages the battery locking lug from the long-length battery when the battery chamber lid is opened from a closed state thereof.Type: GrantFiled: February 7, 2006Date of Patent: December 29, 2009Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Publication number: 20090263120Abstract: A diaphragm driving device for a camera including a camera body and an interchangeable lens which is detachably attached to the camera body, wherein the interchangeable lens includes a diaphragm mechanism having an in-lens spring device for performing a stop-down operation, the in-lens-spring device having a spring constant. The camera body includes a diaphragm drive mechanism having a diaphragm drive motor and an in-body spring device, both of which are for making the diaphragm mechanism of the interchangeable lens perform the stop-down operation, and a controller for controlling a driving current which is supplied to the diaphragm drive motor in accordance with the spring constant of the in-lens spring device.Type: ApplicationFiled: April 15, 2009Publication date: October 22, 2009Applicant: HOYA CORPORATIONInventor: Yuichi KUROSAWA
-
Patent number: 7606483Abstract: An electroluminescent display device includes an electroluminescent display, and at least one switch which is positioned adjacent to an inner surface of the electroluminescent display, the switch being activated upon an outer surface of the electroluminescent display being pressed to resiliently deform the switch.Type: GrantFiled: July 21, 2006Date of Patent: October 20, 2009Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Patent number: 7590339Abstract: A digital camera is provided with a photographing lens, an image capturing element, which is configured to capture an optical image of an object formed by the photographing lens, a coarse movement control system configured to control a position of the photographing lens in a direction of an optical axis by a motor, and a fine movement control system configured to control a position of an image receiving area of the image capturing element in the direction of the optical axis is provided.Type: GrantFiled: November 18, 2005Date of Patent: September 15, 2009Assignee: HOYA CorporationInventor: Yuichi Kurosawa
-
Patent number: 7579750Abstract: An ultrasonic motor includes a stator that includes a comb body with a plurality of circumferentially-arranged comb-like projections and a piezoelectric body integrally mounted on the comb body, a rotor rotatable with respect to the stator, the rotor having a contact surface that establishes pressure contact with the stator, and a driving circuit configured to apply a radio frequency voltage for driving the piezoelectric body to the piezoelectric body. The driving circuit includes a voltage generating unit configured to generate a first radio frequency voltage of which a frequency is randomly varied during a predetermined time period after start-up of the ultrasonic motor.Type: GrantFiled: December 13, 2007Date of Patent: August 25, 2009Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Publication number: 20090195087Abstract: There is provided a linear actuator, which is provided with a multipolar magnet arranged with a plurality of S-poles and N-poles alternately along an axial direction thereof; and a coiled body arranged to be relatively movable in the axial direction face to face with respect to the multipolar magnet. In this configuration, the multipolar magnet comprises an integrally formed isotropic magnet material which is magnetized into S-poles and N-poles alternately along the axial direction thereof.Type: ApplicationFiled: February 4, 2009Publication date: August 6, 2009Applicant: HOYA CORPORATIONInventor: Yuichi KUROSAWA
-
Publication number: 20090195878Abstract: There is provided a linear swing actuator, which is provided with a multipolar magnet arranged with one magnetic pole in a central portion and its respective opposite magnetic poles at both ends thereof along a length direction; and a single coil arranged to be relatively movable in the length direction face to face with respect to the multipolar magnet. In this configuration, a distance between the magnetic pole in the central portion and each of the magnetic poles at the both ends is arranged to be shorter than a dimension in the length direction of the coil.Type: ApplicationFiled: February 4, 2009Publication date: August 6, 2009Applicant: HOYA CORPORATIONInventor: Yuichi KUROSAWA
-
Patent number: 7566180Abstract: A digital camera is provided with an imaging element including a plurality of pixels, a shutter unit capable of intercepting light transmitted from an object to the imaging element, and an optical low pass filter adapted to allow light with predetermined lower spatial frequencies to pass therethrough. The optical low pass filter is embedded in the shutter unit.Type: GrantFiled: November 18, 2005Date of Patent: July 28, 2009Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Patent number: 7541718Abstract: An ultrasonic motor includes a stator that includes a comb body with a plurality of circumferentially-arranged comb-like projections and a piezoelectric body integrally mounted on the comb body, a rotor rotatable with respect to the stator, the rotor establishing pressure contact with the stator, a resin film formed on at least one of pressure contact surfaces of the stator and rotor, and a pressure contact force controlling portion that includes, an elastic member configured to generate a pressure contact force between the stator and rotor with an elastic force thereof, and a compressing portion configured to compress and shorten the elastic member. The pressure contact force controlling portion controls the pressure contact force between the stator and rotor by varying the elastic force of the elastic member depending on temperature of the motor.Type: GrantFiled: December 18, 2007Date of Patent: June 2, 2009Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Patent number: 7538803Abstract: There is provided a digital camera, which is provided with an optical system which forms an image of an object, an image pick-up device which outputs an image signal corresponding to the image formed by said optical system, and a filtering system which filters the image to smooth at least a portion of the image based on the image signal outputted by the image pick-up device. The filtering system may calculate moving averages of pixels in the image. The digital camera may include a filter control system which is configured to change characteristics of the filtering system.Type: GrantFiled: September 19, 2002Date of Patent: May 26, 2009Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Patent number: 7529476Abstract: A digital camera including a detecting system to detect a vibration that occurs in a camera body, an image capturing element drive system, which is adapted to adjust a position of an image capturing element based on an amount of the vibration detected with respect to an optical axis of the camera body is provided. The image capturing element drive system includes a substrate, of which surface is perpendicular to the optical axis, an image capturing element board, which has the image capturing element thereon and is adapted to be driven in parallel with the surface of the substrate with a plurality of rolling support systems provided to the image capturing element board, a biasing system, which is adapted to bias the image capturing element board in a predetermined direction, and a drive system, which is adapted to drive the image capturing element board against biasing force of the biasing system.Type: GrantFiled: January 19, 2006Date of Patent: May 5, 2009Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Patent number: 7471891Abstract: A single-lens-reflex digital camera in which an optical image of an object that is to be photographed via a photographing lens is reflected by a main mirror to be formed on a focusing screen so that the optical image is viewed through a viewfinder while the main mirror is retracted from an optical path of the photographing lens to capture an image of the object by an image pickup device, the single-lens-reflex digital camera includes an electroluminescent display provided on the focusing screen, wherein the electroluminescent display displays at least the object image captured by the image pickup device. The single-lens-reflex digital camera is configured to allow the object image displayed by the electroluminescent display and the optical image formed on the focusing screen to be viewed through the viewfinder.Type: GrantFiled: July 24, 2006Date of Patent: December 30, 2008Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Publication number: 20080297003Abstract: An ultrasonic motor includes a stator that includes a comb body with a plurality of circumferentially-arranged comb-like projections and a piezoelectric body integrally mounted on the comb body, a rotor rotatable with respect to the stator, the rotor having a contact surface that establishes pressure contact with the stator, and a resin film formed with predetermined hardness on the contact surface of the rotor, the resin film containing a solid lubricant.Type: ApplicationFiled: October 2, 2007Publication date: December 4, 2008Applicant: PENTAX CorporationInventor: Yuichi KUROSAWA
-
Patent number: 7456547Abstract: An ultrasonic motor is provided with a circular stator including a piezoelectric element and a comb teeth body with a multitude of comb teeth circumferentially aligned thereon, and a circular rotor supported by a rotating shaft and pressed against the comb teeth body, wherein the comb teeth respectively include, at least in a portion thereof press-contacting the rotor, a plurality of pin-shaped elements radially aligned at a predetermined interval. The pin-shaped element is elastically deformable in a radial direction at least in a tip portion thereof, and has a predetermined rigidity in a circumferential direction.Type: GrantFiled: September 15, 2006Date of Patent: November 25, 2008Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Publication number: 20080199176Abstract: A diaphragm driving device is provided in a camera body of a digital camera to which an interchangeable lens is detachably attached, the interchangeable lens including a diaphragm mechanism having a diaphragm control bar for changing an aperture size by a rotation of the diaphragm control bar about an optical axis. The camera body includes a diaphragm-driving slide plate which engages with the diaphragm control bar when the interchangeable lens is attached to the camera body; a diaphragm drive motor which rotates in both forward and reverse directions for moving the diaphragm-driving slide plate step wise in accordance with object brightness information of an object image formed through the interchangeable lens; and a converting mechanism for converting the rotation of the diaphragm drive motor in the both directions into a force for moving the diaphragm-driving slide plate.Type: ApplicationFiled: February 11, 2008Publication date: August 21, 2008Applicant: PENTAX CORPORATIONInventor: Yuichi KUROSAWA
-
Patent number: 7402935Abstract: An ultrasonic motor is provided with a circular stator including a piezoelectric element and a comb teeth body and a circular rotor supported by a rotating shaft and disposed in close contact with the comb teeth body. The stator and the rotor are magnetized in opposite polarities to each other so that the stator and the rotor are brought into close contact by an attractive magnetic force generated therebetween in an axial direction.Type: GrantFiled: September 7, 2006Date of Patent: July 22, 2008Assignee: Hoya CorporationInventor: Yuichi Kurosawa
-
Publication number: 20080170845Abstract: A camera system includes a camera body having an in-body motor; an interchangeable lens having an in-lens motor, the interchangeable lens being detachable from the camera body; a focusing mechanism for moving a focusing lens group provided in the interchangeable lens in an optical axis direction thereof; a rotational force transmission device which transmits a rotational force of the in-body motor to the focusing mechanism to perform an AF operation in a state where the interchangeable lens is attached to the camera body; an auto-focusing mechanism for driving the focusing mechanism to perform an AF operation by the in-lens motor, independently from the in-body motor; and a one-way clutch which allows transmission of a rotational force of the in-body motor to the in-lens motor while preventing a rotational force of the in-lens motor from being transmitted to the in-body motor.Type: ApplicationFiled: January 11, 2008Publication date: July 17, 2008Applicant: PENTAX CORPORATIONInventor: Yuichi KUROSAWA
-
Publication number: 20080150394Abstract: An ultrasonic motor includes a stator that includes a comb body with a plurality of circumferentially-arranged comb-like projections and a piezoelectric body integrally mounted on the comb body, a rotor rotatable with respect to the stator, the rotor establishing pressure contact with the stator, a resin film formed on at least one of pressure contact surfaces of the stator and rotor, and a pressure contact force controlling portion that includes, an elastic member configured to generate a pressure contact force between the stator and rotor with an elastic force thereof, and a compressing portion configured to compress and shorten the elastic member. The pressure contact force controlling portion controls the pressure contact force between the stator and rotor by varying the elastic force of the elastic member depending on temperature of the motor.Type: ApplicationFiled: December 18, 2007Publication date: June 26, 2008Applicant: PENTAX CORPORATIONInventor: Yuichi KUROSAWA
-
Publication number: 20080143213Abstract: An ultrasonic motor includes a stator that includes a comb body with a plurality of circumferentially-arranged comb-like projections and a piezoelectric body integrally mounted on the comb body, a rotor rotatable with respect to the stator, the rotor having a contact surface that establishes pressure contact with the stator, and a driving circuit configured to apply a radio frequency voltage for driving the piezoelectric body to the piezoelectric body. The driving circuit includes a voltage generating unit configured to generate a first radio frequency voltage of which a frequency is randomly varied during a predetermined time period after start-up of the ultrasonic motor.Type: ApplicationFiled: December 13, 2007Publication date: June 19, 2008Applicant: PENTAX CORPORATIONInventor: Yuichi Kurosawa