Patents by Inventor Kazuyoshi Umemura

Kazuyoshi Umemura 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: 8746878
    Abstract: An optical member includes a substoichiometric titanium oxide film formed by depositing substoichiometric titanium oxides in a vacuum chamber into which an oxygen gas for adjusting a vacuum is introduced. In the optical member, the film forming pressure p (Pa) in the vacuum chamber and the optical film thickness (a refractive index of 2.50, a wavelength of 500 nm) of the substoichiometric titanium oxide film have relations of (1) p?0.005, (2) optical film thickness ?0.500?, and (3) optical film thickness ?(0.001exp(905.73p)?0.050)? where exp is an exponential function with e as the base of the natural logarithm.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: June 10, 2014
    Assignee: Tokai Optical Co., Ltd.
    Inventors: Tsuyoshi Fukagawa, Hirotoshi Takahashi, Kazuyoshi Umemura
  • Patent number: 8428298
    Abstract: A speaker has high sound quality by reducing resonance of curved parts in a speaker damper without decreasing sound pressure and by providing high linearity characteristic. In a damper for a speaker formed by including at least two curved parts, an elastic member is provided at least on one side or on both sides of a peripheral part in a movable part of the damper or provided in the material.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: April 23, 2013
    Assignee: Panasonic Corporation
    Inventors: Kimihiro Ando, Kazuyoshi Umemura
  • Publication number: 20120062833
    Abstract: An optical member includes a substoichiometric titanium oxide film formed by depositing substoichiometric titanium oxides in a vacuum chamber into which an oxygen gas for adjusting a vacuum is introduced. In the optical member, the film forming pressure p (Pa) in the vacuum chamber and the optical film thickness (a refractive index of 2.50, a wavelength of 500 nm) of the substoichiometric titanium oxide film have relations of (1) p?0.005, (2) optical film thickness ?0.500?, and (3) optical film thickness ?(0.001exp(905.73p)?0.050)? where exp is an exponential function with e as the base of the natural logarithm.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 15, 2012
    Applicant: Tokai Optical Co., Ltd.
    Inventors: Tsuyoshi FUKAGAWA, Hirotoshi Takahashi, Kazuyoshi Umemura
  • Patent number: 8116510
    Abstract: A magnetic circuit part of a loudspeaker is formed of a plate, a magnet, and a yoke. A step is disposed in the plate that comes into contact with a disc-like magnet and forms a magnetic gap. A loudspeaker is provided where the step moves a voice coil away from the leakage magnetic field of the yoke, the influence of the leakage magnetic field is eliminated even when the output is large, the distortion is small, and the sound quality is high.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: February 14, 2012
    Assignee: Panasonic Corporation
    Inventor: Kazuyoshi Umemura
  • Patent number: 7995788
    Abstract: A leader line of a voice coil from a conductive wire part is drawn out from a part between a diaphragm coupling part and a part disposed in the magnetic gap toward a frame in a non-contact state with a diaphragm. One end side of the second edge made of an elastic body is coupled to a part between a drawing part of the leader line on the voice coil and a part of the voice coil disposed in the magnetic gap. The other end side of the second edge is coupled to the frame. A suspension holder is integrated with the proximity of a coupling part of the second edge to the voice coil. The suspension holder is stuck to the voice coil using an adhesive. The disturbance of the movement of the voice coil can be reduced.
    Type: Grant
    Filed: April 25, 2008
    Date of Patent: August 9, 2011
    Assignee: Panasonic Corporation
    Inventors: Osamu Funahashi, Hiroyuki Morimoto, Kazuyoshi Umemura
  • Patent number: 7844071
    Abstract: Voice coil body of a loudspeaker is provided at the outer circumferential wall surface with a supporting section. Diameter of the inner circumference of suspension holder is greater than outer diameter of the voice coil body while diameter of the inner circumference of diaphragm is greater than diameter of the inner circumference of suspension holder for facilitating a gluing of the inner circumferential end of suspension holder and the inner circumferential end of diaphragm on the supporting section and to the voice coil body. By so doing, harmonic distortion of a loudspeaker can be further reduced.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: November 30, 2010
    Assignee: Panasonic Corporation
    Inventors: Osamu Funahashi, Seiichi Yoshida, Kimihiro Ando, Kazuyoshi Umemura
  • Publication number: 20100172536
    Abstract: A leader line of a voice coil from a conductive wire part is drawn out from a part between a diaphragm coupling part and a part disposed in the magnetic gap toward a frame in a non-contact state with a diaphragm. One end side of the second edge made of an elastic body is coupled to a part between a drawing part of the leader line on the voice coil and a part of the voice coil disposed in the magnetic gap. The other end side of the second edge is coupled to the frame. A suspension holder is integrated with the proximity of a coupling part of the second edge to the voice coil. The suspension holder is stuck to the voice coil using an adhesive. The disturbance of the movement of the voice coil can be reduced.
    Type: Application
    Filed: April 25, 2008
    Publication date: July 8, 2010
    Applicant: PANASONIC CORPORATION
    Inventors: Osamu Funahashi, Hiroyuki Morimoto, Kazuyoshi Umemura
  • Publication number: 20100158305
    Abstract: A loudspeaker includes frame, diaphragm whose outer rim is supported by this frame, voice coil unit connected to this diaphragm, magnetic circuit where voice coil of this voice coil unit is movably disposed in its magnetic gap, and first edge member and second edge member for supporting voice coil unit by frame. Voice coil unit is supported at two points at a predetermined interval to the side of magnetic gap from a part where diaphragm is connected. First edge member and second edge member include heat-resistant connectors that allow air to pass through, and ring edges and made of a resilient material connected to these connectors. Edge of first edge member or edge of second edge member protrudes toward diaphragm and the other edge protrudes toward magnetic circuit.
    Type: Application
    Filed: June 5, 2008
    Publication date: June 24, 2010
    Inventors: Osamu Funahashi, Hiroyuki Morimoto, Kazuyoshi Umemura
  • Publication number: 20090208025
    Abstract: An electromechanical converter has independent electric input sections. The output of an active noise reduction controller is inputted into an electric input section and the audio signal from an audio section is inputted into an electric input section. These are mechanically combined at a vibration section and the combined signal is radiated as a sound wave into the space. With such a structure, both the active noise reduction function and the audio reproduction function are realized without installing a large device in an existing audio reproduction apparatus.
    Type: Application
    Filed: July 25, 2007
    Publication date: August 20, 2009
    Applicant: PANASONIC CORPORATION
    Inventors: Yoshiyuki Hayashi, Yoshio Nakamura, Kimihiro Ando, Kazuyoshi Umemura, Shinichi Oki, Kenji Okamoto
  • Patent number: 7574013
    Abstract: The speaker has a frame, a magnetic circuit, a voice coil body and a diaphragm. The magnetic circuit is disposed inside of the frame to form a magnetic gap. The voice coil body is disposed movably in the magnetic gap. The diaphragm is coupled to the voice coil body by an inner periphery edge thereof and to the frame by an outer periphery edge thereof. The outer peripheral surface of a convex portion provided on a bottom of the frame is at least either being brought into contact with or in proximity to the magnetic circuit. The configuration can provide the speaker with excellent heat dissipation characteristics.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: August 11, 2009
    Assignee: Panasonic Corporation
    Inventors: Osamu Funahashi, Seiichi Yoshida, Kimihiro Ando, Kazuyoshi Umemura, Yoichi Asahi
  • Publication number: 20090052724
    Abstract: A magnetic circuit part of a loudspeaker is formed of a plate, a magnet, and a yoke. A step is disposed in the plate that comes into contact with a disc-like magnet and forms a magnetic gap. A loudspeaker is provided where the step moves a voice coil away from the leakage magnetic field of the yoke, the influence of the leakage magnetic field is eliminated even when the output is large, the distortion is small, and the sound quality is high.
    Type: Application
    Filed: February 5, 2007
    Publication date: February 26, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventor: Kazuyoshi Umemura
  • Publication number: 20090028377
    Abstract: The present invention realizes a speaker having high sound quality by reducing resonance of curved parts in a speaker damper without decreasing sound pressure and by providing high linearity characteristic. In a damper for a speaker formed by including at least two curved parts, an elastic member is provided at least on one side or on both sides of a peripheral part in a movable part of the damper or provided in the material.
    Type: Application
    Filed: April 3, 2007
    Publication date: January 29, 2009
    Inventors: Kimihiro Ando, Kazuyoshi Umemura
  • Publication number: 20070177757
    Abstract: Voice coil body of a loudspeaker is provided at the outer circumferential wall surface with a supporting section. Diameter of the inner circumference of suspension holder is greater than outer diameter of the voice coil body while diameter of the inner circumference of diaphragm is greater than diameter of the inner circumference of suspension holder for facilitating a gluing of the inner circumferential end of suspension holder and the inner circumferential end of diaphragm on the supporting section and to the voice coil body. By so doing, harmonic distortion of a loudspeaker can be further reduced.
    Type: Application
    Filed: November 18, 2005
    Publication date: August 2, 2007
    Inventors: Osamu Funahashi, Seiichi Yoshida, Kimihiro Ando, Kazuyoshi Umemura
  • Publication number: 20070121995
    Abstract: The speaker has a frame, a magnetic circuit, a voice coil body and a diaphragm. The magnetic circuit is disposed inside of the frame to form a magnetic gap. The voice coil body is disposed movably in the magnetic gap. The diaphragm is coupled to the voice coil body by an inner periphery edge thereof and to the frame by an outer periphery edge thereof. The outer peripheral surface of a convex portion provided on a bottom of the frame is at least either being brought into contact with or in proximity to the magnetic circuit. The configuration can provide the speaker with excellent heat dissipation characteristics.
    Type: Application
    Filed: December 9, 2005
    Publication date: May 31, 2007
    Inventors: Osamu Funahashi, Seiichi Yoshida, Kimihiro Ando, Kazuyoshi Umemura, Yoichi Asahi
  • Patent number: 7149322
    Abstract: A magnetic circuit of the present invention uses a yoke, wherein a thickness of a bottom portion 10b of the yoke 10 is thicker than a thickness of a cylindrical peripheral portion 10a of the yoke 10. The magnetic circuit of the present invention includes the yoke, a magnet 2 bonded to the bottom portion of the yoke, and a top plate 3 bonded to the magnet, the top plate forming a magnetic gap with the cylindrical peripheral portion in between. According to a configuration of the present invention, it is possible to reduce the magnetic saturation in the bottom portion of the yoke and to improve the efficiency of the magnetic circuit. As a result, the configuration contributes to improve the performance and efficiency of a loudspeaker using the magnetic circuit of the present invention.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: December 12, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Ryo Kuribayashi, Kazuyoshi Umemura, Hiroyuki Morimoto, Michitaka Oda
  • Publication number: 20040086148
    Abstract: A magnetic circuit of the present invention uses a yoke, wherein a thickness of a bottom portion 10b of the yoke 10 is thicker than a thickness of an outer cylindrical portion 10a. The magnetic circuit of the present invention comprises the yoke, a magnet 2 bonded to the bottom portion of the yoke, and a top plate 3 bonded to the magnet, a magnetic gap being formed between the top plate and the outer cylindrical portion. According to a configuration of the present invention, it is possible to reduce the magnetic saturation in the bottom portion of the yoke and to improve the efficiency of the magnetic circuit. As a result, the configuration contributes to improve the performance and efficiency of a loudspeaker using the magnetic circuit of the present invention.
    Type: Application
    Filed: August 20, 2003
    Publication date: May 6, 2004
    Inventors: Ryo Kuribayashi, Kazuyoshi Umemura, Hiroyuki Morimoto, Michitaka Oda