Patents by Inventor Koichi Wani

Koichi Wani 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: 9305736
    Abstract: Provided is a phosphor for a dispersion-type EL that may be manufactured in a simple process and may provide stable, high brightness and light emission efficiency. The phosphor for a dispersion-type EL according to the present invention includes a mixture of an electron-accepting phosphor particle (4A) and an electron-donating phosphor particle (4B). The electron-accepting phosphor particle (4A) includes a base particle and an acceptor element added thereto, and the electron-donating phosphor particle (4B) includes a base particle and a donor element added thereto. For example, the base particle is a ZnS particle, the acceptor element is Cu, and the donor element is Cl or Al.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: April 5, 2016
    Assignee: TAZMO CO., LTD.
    Inventors: Koichi Wani, Tatsuya Kanda, Emi Hashimoto, Kazushi Kawakami, Sadahiro Yagishita, Fumitaka Iwakura, Taku Nishikawa
  • Publication number: 20140138590
    Abstract: Provided is a phosphor for a dispersion-type EL that may be manufactured in a simple process and may provide stable, high brightness and light emission efficiency. The phosphor for a dispersion-type EL according to the present invention includes a mixture of an electron-accepting phosphor particle (4A) and an electron-donating phosphor particle (4B). The electron-accepting phosphor particle (4A) includes a base particle and an acceptor element added thereto, and the electron-donating phosphor particle (4B) includes a base particle and a donor element added thereto. For example, the base particle is a ZnS particle, the acceptor element is Cu, and the donor element is Cl or Al.
    Type: Application
    Filed: July 11, 2012
    Publication date: May 22, 2014
    Applicant: TAZMO CO., LTD.
    Inventors: Koichi Wani, Tatsuya Kanda, Emi Hashimoto, Kazushi Kawakami, Sadahiro Yagishita, Fumitaka Iwakura, Taku Nishikawa
  • Patent number: 6873103
    Abstract: A gas discharge panel having plural pairs of display electrodes disposed so as to extend through a plurality of cells, each pair being formed from a sustain electrode and a scan electrode. The sustain and scan electrodes each include a plurality of line parts, and an aggregate width of the line parts included in the sustain and scan electrodes is in a range of 22% to 48% inclusive of pixel pitch.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: March 29, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yuusuke Takada, Toru Ando, Nobuaki Nagao, Hidetaka Higashino, Masaki Nishimura, Ryuichi Murai, Yoshio Watanabe, Naoki Kosugi, Hiroyuki Tachibana, Koichi Wani
  • Patent number: 6768478
    Abstract: The object of the present invention is to provide a method of driving of an AC type plasma display panel with higher emitting efficiency without increasing the external-sustain voltage VSUS, even if the discharge sustain gap dp is extended. An AC type plasma display panel according to the present invention comprises a first and second substrates arranged opposite to each other. The first substrate includes a plurality pairs of a first and second electrodes extending parallel each other, and a dielectric layer covering thereon. The second substrate includes a plurality of third electrodes extending in a direction crossing the first and second electrodes, and a plurality of partition walls between each third electrode. A method of the panel according to the present invention comprises applying a voltage so that the discharge generated in the first opposing discharge space progresses towards a second opposing discharge space and extends along the third electrode.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: July 27, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koichi Wani, Kazunori Hirao, Koji Aoto, Yoshihito Tahara
  • Patent number: 6707259
    Abstract: A gas discharge panel having (i) a plurality of cells arranged in a matrix between a pair of opposing substrates, the cells being filled with a discharge gas, and (ii) plural pairs of display electrodes arranged on a surface of one of the substrates so as to extend through the plurality of cells, each pair of display electrodes being composed of a sustain electrode and a scan electrode that define a main discharge gap therebetween. In such a gas discharge panel, each sustain electrode and scan electrode includes a plurality of line parts that extend in a row direction of the matrix. Furthermore, the main discharge gap and a line part gap between adjacent line parts are provided such that a discharge current waveform of the display electrodes has a single peak when the gas discharge panel is driven.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: March 16, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobuaki Nagao, Hidetaka Higashino, Toru Ando, Yuusuke Takada, Masaki Nishimura, Ryuichi Murai, Koichi Wani, Naoki Kosugi, Hiroyuki Tachibana, Yoshio Watanabe
  • Publication number: 20040041522
    Abstract: A gas discharge panel having plural pairs of display electrodes disposed so as to extend through a plurality of cells, each pair being formed from a sustain electrode and a scan electrode. The sustain and scan electrodes each include a plurality of line parts, and an aggregate width of the line parts included in the sustain and scan electrodes is in a range of 22% to 48% inclusive of pixel pitch.
    Type: Application
    Filed: July 21, 2003
    Publication date: March 4, 2004
    Inventors: Yuusuke Takada, Toru Ando, Nobuaki Nagao, Hidetaka Higashino, Masaki Nishimura, Ryuichi Murai, Yoshio Watanabe, Naoki Kosugi, Hiroyuki Tachibana, Koichi Wani
  • Publication number: 20030146713
    Abstract: A gas discharge panel having (i) a plurality of cells arranged in a matrix between a pair of opposing substrates, the cells being filled with a discharge gas, and (ii) plural pairs of display electrodes arranged on a surface of one of the substrates so as to extend through the plurality of cells, each pair of display electrodes being composed of a sustain electrode and a scan electrode that define a main discharge gap therebetween. In such a gas discharge panel, each sustain electrode and scan electrode includes a plurality of line parts that extend in a row direction of the matrix. Furthermore, the main discharge gap and a line part gap between adjacent line parts are provided such that a discharge current waveform of the display electrodes has a single peak when the gas discharge panel is driven.
    Type: Application
    Filed: October 7, 2002
    Publication date: August 7, 2003
    Inventors: Nobuaki Nagao, Hidetaka Higashino, Toru Ando, Yuusuke Takada, Masaki Nishimura, Ryuichi Murai, Koichi Wani, Naoki Kosugi, Hiroyuki Tachibana, Yoshio Watanabe
  • Patent number: 6577070
    Abstract: An AC type plasma display panel is designed so as to have the relationships of Wb>Wg>Wr and Db>Dg>Dr, where Wb, Wg and Wr denote the widths of blue, green and red discharge cells and Db, Dg and Dr denote the widths of address electrodes (15b, 15g and 15r) corresponding to respective colors. As a result, it is possible to adjust the electric charge stored in the discharge cells due to a write discharge according to colors, thereby making complete lighting write voltages of the discharge cells uniform. This achieves the AC type plasma display panel with an excellent display quality that has less occurrence of erroneous discharge and discharge flicker and an improved white display quality.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: June 10, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Koichi Wani
  • Patent number: 6577069
    Abstract: An AC type plasma display panel is designed so as to have the relationships of Wb>Wg>Wr and Db>Dg>Dr, where Wb, Wg and Wr denote the widths of blue, green and red discharge cells and Db, Dg and Dr denote the widths of address electrodes (15b, 15g and 15r) corresponding to respective colors. As a result, it is possible to adjust the electric charge stored in the discharge cells due to a write discharge according to colors, thereby making complete lighting write voltages of the discharge cells uniform. This achieves the AC type plasma display panel with an excellent display quality that has less occurrence of erroneous discharge and discharge flicker and an improved white display quality.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: June 10, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Koichi Wani
  • Patent number: 6552486
    Abstract: A front substrate and a back substrate are placed opposing each other separated by a discharge space. The front substrate is made of a semitransparent material such as a dark color glass with a mean transmittance for visible light of 60 to 80%. On the front substrate, a group of electrodes including pairs of scanning electrodes and sustaining electrodes covered with a dielectric layer and a protective coating are provided. Data electrodes and spacers are formed on the back substrate, and phosphors are provided on the data electrodes towards the side of the spacers. A front filter, which is made of a semitransparent glass sheet with a mean transmittance for visible light of 60 to 80%, is disposed on the front side of the front substrate. The present invention realizes a display with less halation and high contrast. Also, a detection rate of a defect in electrodes, which are formed on the front substrate, improves.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: April 22, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koichi Wani, Kazunori Hirao, Koji Aoto, Yoshihito Tahara
  • Patent number: 6424095
    Abstract: An AC type plasma display panel is designed so as to have the relationships of Wb>Wg>Wr and Db>Dg>Dr, where Wb, Wg and Wr denote the widths of blue, green and red discharge cells and Db, Dg and Dr denote the widths of address electrodes (15b, 15g and 15r) corresponding to respective colors. As a result, it is possible to adjust the electric charge stored in the discharge cells due to a write discharge according to colors, thereby making complete lighting write voltages of the discharge cells uniform. This achieves the AC type plasma display panel with an excellent display quality that has less occurrence of erroneous discharge and discharge flicker and an improved white display quality.
    Type: Grant
    Filed: August 7, 2000
    Date of Patent: July 23, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Koichi Wani
  • Publication number: 20020070676
    Abstract: An AC type plasma display panel is designed so as to have the relationships of Wb>Wg>Wr and Db>Dg>Dr, where Wb, Wg and Wr denote the widths of blue, green and red discharge cells and Db, Dg and Dr denote the widths of address electrodes (15b, 15g and 15r) corresponding to respective colors. As a result, it is possible to adjust the electric charge stored in the discharge cells due to a write discharge according to colors, thereby making complete lighting write voltages of the discharge cells uniform. This achieves the AC type plasma display panel with an excellent display quality that has less occurrence of erroneous discharge and discharge flicker and an improved white display quality.
    Type: Application
    Filed: February 4, 2002
    Publication date: June 13, 2002
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Koichi Wani
  • Patent number: 6304031
    Abstract: A high-capacity, high-definition plasma display panel capable of providing a high-quality image has an image display area 16 within which pairs of sustaining electrodes and pairs of scanning electrodes are disposed in an alternating fashion with each other. Each pair of the sustaining electrodes are connected at their opposite ends with each other and, similarly, each pair of the scanning electrodes are connected at their opposite ends with each other. A unitary pixel is defined at an intersection between one of data electrodes 8 and a group including a pair of the scanning electrode, one of pair of the sustaining electrodes adjacent such pair of the scanning electrodes and one of the next succeeding pair of the sustaining electrodes adjacent such pair of the scanning electrodes.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: October 16, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koichi Wani, Kazunori Hirao
  • Patent number: 6236380
    Abstract: A method for displaying an image with gradation and a high brightness with a plasma display panel is provided. In this method, one field is divided into eight subfields, and each subfield is divided into an addressing period and sustaining period. In the upper four bits b4, b5, b6, and b7, in which the sustaining period is long, all of the scanning electrodes are scanned sequentially. In the lower four bits b0, b1, b2 and b3, in which the sustaining period is short, the scanning electrodes are scanned alternately by interlace scanning.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: May 22, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koichi Wani, Naoki Kosugi, Takao Wakitani
  • 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: 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