Patents by Inventor Mutsumi Mimasu

Mutsumi Mimasu 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: 6249078
    Abstract: In a microwave-excited discharge lamp of the present invention, a rare gas 2, a mercury halide 3 as a buffer material, and a metal halide 4 as a luminous material are sealed within an discharge tube 1. This achieves a microwave-excited discharge lamp having excellent stability and a variety of light colors.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: June 19, 2001
    Assignee: Matsushita Electronics Corporation
    Inventor: Mutsumi Mimasu
  • Patent number: 5998934
    Abstract: A microwave-excited discharge lamp apparatus of the present invention has a translucent blow guide 6 arranged around a microwave-excited discharge lamp 4. Thereby, even when the microwave-excited discharge lamp 4 is reduced in size, the microwave-excited discharge lamp 4 can be cooled efficiently without complicating or increasing the size of the apparatus.
    Type: Grant
    Filed: May 4, 1998
    Date of Patent: December 7, 1999
    Assignee: Matsushita Electronics Corporation
    Inventors: Mutsumi Mimasu, Koichi Katase, Katsushi Seki
  • Patent number: 5905342
    Abstract: A microwave-excited discharge lamp (2) is constructed with a double-case structure consisting of an outer case (3) disposed in a microwave electromagnetic field, and an inner case (4) disposed inside the outer case.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: May 18, 1999
    Assignee: Matsushita Electronics Corporation
    Inventors: Mutsumi Mimasu, Koichi Katase
  • Patent number: 5670975
    Abstract: A method for driving a gas discharge display panel consists of the steps of applying a writing pulse on a specific display electrode line selected from display electrode lines arranged side by side in the panel, applying a scanning pulse on a specific scanning electrode line selected from scanning electrode lines which are arranged side by side and cross the display electrode lines to produce writing gas discharge in cooperation with the writing pulse in a specific discharge cell arranged at an intersection space between the specific display electrode and the specific scanning electrode line, and applying a series of maintaining pulses subsequent to the scanning pulse on the specific scanning electrode during only a maintaining period to produce maintaining gas discharge subsequent to the writing gas discharge in the specific discharge cell, the maintaining gas discharge being intermittently produced in synchronism with the maintaining pulses.
    Type: Grant
    Filed: August 8, 1996
    Date of Patent: September 23, 1997
    Assignees: Nippon Hoso Kyokai, Matsushita Electronics Corporation
    Inventors: Yoshimichi Takano, Tetsuo Sakai, Hiroshi Murakami, Kazuo Takahashi, Mutsumi Mimasu, Utaro Miyagawa, Makoto Takei, Koichi Wani
  • Patent number: 5610623
    Abstract: A method for driving a gas discharge display panel consists of the steps of applying a writing pulse on a specific display electrode line selected from display electrode lines arranged side by side in the panel, applying a scanning pulse on a specific scanning electrode line selected from scanning electrode lines which are arranged side by side and cross the display electrode lines to produce writing gas discharge in cooperation with the writing pulse in a specific discharge cell arranged at an intersection space between the specific display electrode and the specific scanning electrode line, and applying a series of maintaining pulses subsequent to the scanning pulse on the specific scanning electrode during only a maintaining period to produce maintaining gas discharge subsequent to the writing gas discharge in the specific discharge cell, the maintaining gas discharge being intermittently produced in synchronism with the maintaining pulses.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: March 11, 1997
    Assignees: Nippon Hoso Kyokai, Matsushita Electronics Corporation
    Inventors: Yoshimichi Takano, Tetsuo Sakai, Hiroshi Murakami, Kazuo Takahashi, Mutsumi Mimasu, Utaro Miyagawa, Makoto Takei, Koichi Wani
  • Patent number: 5572230
    Abstract: A method for driving a gas discharge display panel consists of the steps of applying a writing pulse on a specific display electrode line selected from display electrode lines arranged side by side in the panel, applying a scanning pulse on a specific scanning electrode line selected from scanning electrode lines which are arranged side by side and cross the display electrode lines to produce writing gas discharge in cooperation with the writing pulse in a specific discharge cell arranged at an intersection space between the specific display electrode and the specific scanning electrode line, and applying a series of maintaining pulses subsequent to the scanning pulse on the specific scanning electrode during only a maintaining period to produce maintaining gas discharge subsequent to the writing gas discharge in the specific discharge cell, the maintaining gas discharge being intermittently produced in synchronism with the maintaining pulses.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: November 5, 1996
    Assignees: Nippon Hoso Kyokai, Matsushita Electronics Corporation
    Inventors: Yoshimichi Takano, Tetsuo Sakai, Hiroshi Murakami, Kazuo Takahashi, Mutsumi Mimasu, Utaro Miyagawa, Makoto Takei, Koichi Wani
  • Patent number: 5410219
    Abstract: A method for driving a plasma display panel comprising a plurality of first electrodes disposed in parallel with each other, a plurality of second electrodes disposed in parallel with each other and perpendicular to the first electrodes, the second electrodes having a plurality of blocks, and a driving means to apply pulses to the second electrodes, wherein the different electrodes belonging to the different blocks are successively scanned in the predetermined order. Alternatively, the different electrodes may be scanned by repeating applications of pulse to a second electrode belonging to a certain block and to a second electrode belonging to either of the adjacent blocks.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: April 25, 1995
    Assignee: Matsushita Electronics Corporation
    Inventors: Makoto Takei, Kazuo Takahashi, Koichi Wani, Mutsumi Mimasu, Utaro Miyagawa, Akiko Tamura
  • Patent number: 5271026
    Abstract: In a discharge excitation gas laser device such as an excimer laser device provided with laser medium gas and a pair of electrodes opposite to each other in a gas-tight vessel, the laser medium gas is discharge-excited while inverting the polarity of a DC pulse voltage applied to the pair of electrodes opposite to each other for every pulse. In this way distribution of atoms and ions constituting the laser medium gas in the discharge region including the neighborhood of the main electrodes is made uniform even at a high repetition rate oscillation. Thus it is possible to realize a discharge excitation gas laser device having a good stability of DC pulse discharge without increasing unnecessarily the flow speed of the laser medium gas and no lowering in the pulse energy owing to a high efficiency operation.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: December 14, 1993
    Assignee: Matsushita Electric Industrial Co. Ltd.
    Inventors: Naoki Kosugi, Yasuhiro Shimada, Hidehito Kawahara, Tadaaki Miki, Mutsumi Mimasu
  • Patent number: 5134273
    Abstract: A pulsed light source comprising a laser for emitting light in pulse form in response to an electric power from a power supply which is changeable in accordance with a control signal from an external circuit and a photodetector responsive to the light from the laser so as to produce an electric signal corresponding to the intensity of the reception light. The output signal of the photodetector is supplied to a comparator so as to compare the electric signal therefrom with a reference signal to output a signal proportional to the difference between the electric signal and the reference signal. In response to the output signal of the comparator, a control circuit produces the control signal to be supplied to the power supply by adding the output signal of the comparator to a predetermined signal to control the electric power outputted from the power supply to the laser.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: July 28, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koichi Wani, Mutsumi Mimasu, Tadaaki Miki, Yasuhiro Shimada
  • Patent number: 5050174
    Abstract: A laser device includes an optical resonator comprising a laser medium and two totally reflecting mirrors disposed on respective sides of the laser medium. The laser device also has a wavelength selection element disposed between one of the totally reflecting mirrors and the laser medium. A partially reflecting mirror is disposed between the wavelength selection element and the laser medium. Any distortion and deterioration of the wavelength selection device are greatly reduced.
    Type: Grant
    Filed: February 14, 1990
    Date of Patent: September 17, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koichi Wani, Yasuhiro Shimada, Hidehito Kawahara, Mutsumi Mimasu, Tadaaki Miki