Patents by Inventor Takao Mizukami

Takao Mizukami 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).

  • Package for light emitting element and manufacturing method thereof
    Patent number: 7411222
    Abstract: A package for light emitting element including a package main body 1 having a bottom face 7a on which a light emitting element 2 is arranged, and a concave portion 7 which is formed in an inverted truncated cone shape by an inner wall face 7b intersecting with the bottom face 7a with a predetermined angle, and a translucent member 6 filled in the concave portion 7 of the package main body 1, the angle between the inner wall face 7b composing the concave portion 7 and the bottom face 7a is selected within ±15° of the incident critical angle in which a direct light radiated from the light emitting element 2 undergoes total reflection at the interface between the translucent member 6 and air.
    Type: Grant
    Filed: November 11, 2004
    Date of Patent: August 12, 2008
    Assignee: Harison Toshiba Lighting Corporation
    Inventors: Junichi Kinoshita, Tsuneo Nakayama, Takao Mizukami, Yuji Wagatsuma, Kiyoshi Matsunaga, Naoki Matsuoka, Norihiko Ochi
  • Lighting device and display equipment
    Patent number: 6166491
    Abstract: A lighting device controls power to a discharge lamp according to the temperature detected by a lamp sensor, which detects temperature around the discharge lamp. The discharge lamp has an arc tube and an outer bulb between which an airtight space is defined. Therefore, the lamp can be actuated without reduction in luminosity even at low temperatures. Also, the lamp luminosity rises quickly.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: December 26, 2000
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Ryuji Tsuchiya, Naoki Tsutsui, Yuji Wagatsuma, Yoshinori Sato, Takao Mizukami
  • Ring-shaped lamp device having bulb tiltable relative to base structure
    Patent number: 5204580
    Abstract: A lamp device includes a ring-shaped bulb, terminated at a prescribed annular length, each terminated portion of which is formed in a linear shape so as to make the bulb axis of one of the terminated portions coincide with that of the other terminated portion, and a base structure rotatably mounted around the opposite terminated portions of the bulb. Thus, the location of the bulb can be adjusted to a desirable position by the rotation of the bulb when the lamp device is attached to an external supporting device.
    Type: Grant
    Filed: July 12, 1991
    Date of Patent: April 20, 1993
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Masaharu Baba, Takao Mizukami, Masako Nakamura
  • Illuminating apparatus
    Patent number: 5079681
    Abstract: An illuminating apparatus including a casing having an open side, a light reflective surface formed on the interior of the casing, a light diffusive transmission member on the casing and covering the open side, a discharge lamp mounted in the casing underneath the light diffusive transmission member, a first heating element disposed between the discharge lamp and the light reflective surface and a second heating element disposed between the discharge lamp and the light diffusive transmission member.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: January 7, 1992
    Assignee: Toshiba Lighting and Technology Corporation
    Inventors: Masaharu Baba, Yasuhiro Nieda, Akihiko Komatsuzaki, Takao Mizukami