Patents by Inventor Yoshihito Tahara
Yoshihito Tahara 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).
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Patent number: 6768478Abstract: 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: GrantFiled: September 27, 2000Date of Patent: July 27, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Wani, Kazunori Hirao, Koji Aoto, Yoshihito Tahara
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Patent number: 6603264Abstract: A plasma display panel has spaced apart and parallel first and second substrates. A base 5 glass layer is provided on one surface of the second substrate confronting the first substrate. A plurality of spaced apart parallel ribs are positioned on the base glass layer and between the first and second substrates. Each rib defines a channel with a neighboring rib. A plurality of phosphors capable of emitting light are provided, each of which is positioned a corresponding channel. In particular, the base glass layer and/or ribs are made of material substantially impermeable to and non-reflective of light.Type: GrantFiled: March 30, 1999Date of Patent: August 5, 2003Assignee: Matsushita Electric Industrial of Co., Ltd.Inventors: Kazunori Hirao, Koji Aoto, Yoshihito Tahara
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Patent number: 6577070Abstract: 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: GrantFiled: February 4, 2002Date of Patent: June 10, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Koichi Wani
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Patent number: 6577069Abstract: 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: GrantFiled: February 4, 2002Date of Patent: June 10, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Koichi Wani
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Patent number: 6552486Abstract: 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: GrantFiled: November 19, 1999Date of Patent: April 22, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Wani, Kazunori Hirao, Koji Aoto, Yoshihito Tahara
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Patent number: 6424095Abstract: 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: GrantFiled: August 7, 2000Date of Patent: July 23, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Koichi Wani
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Publication number: 20020079843Abstract: 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: ApplicationFiled: February 4, 2002Publication date: June 27, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Kochi Wani
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Publication number: 20020070676Abstract: 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: ApplicationFiled: February 4, 2002Publication date: June 13, 2002Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Kazunori Hirao, Kenji Kiriyama, Koji Aoto, Yoshihito Tahara, Taichi Shino, Koichi Wani
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Patent number: 6335591Abstract: A gas discharge display panel has front and rear plates. The plates are spaced apart from each other, thereby forming a chamber in which a discharge gas is contained. Also, both the front and rear plates are dark in color. Preferably, both the front and rear plates have a darkness of about 20% or more or a transparency of about 80% or less. This decreases halation of light, thereby preventing the mixing of colors. Also, the gas discharge display panel provides a high contrast and clear images to viewers.Type: GrantFiled: February 16, 1999Date of Patent: January 1, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazunori Hirao, Koji Aoto, Yoshihito Tahara