Patents by Inventor Hiromu Yamada
Hiromu Yamada 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: 6917157Abstract: Disclosed is an electrode for an electron source, a method for producing the same, and an electronic tube using the same which provide a decreased thickness of an electron emitting source, and an improved current distribution percentage. The electronic tube comprises a substrate, an electron emitting source area formed on the substrate, and a shield area around the electron emitting area. The shield area is formed of a material that does not produce an electron emitting source, when the electron emitting source is produced by a dry method. As a result, if a space between an electron drawing electrode and the electrode for the electron source is narrow, the percentage of anode current increases in the total current, thereby improving the current distribution percentage.Type: GrantFiled: June 7, 2002Date of Patent: July 12, 2005Assignee: Noritake Co., Ltd.Inventors: Tomotaka Ezaki, Sashiro Uemura, Junko Yotani, Hiromu Yamada, Takeshi Nagasako, Hiroyuki Kurachi, Kazunori Tatsuda, Yukiharu Seko, Tsuyoshi Maesoba
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Patent number: 6914380Abstract: A vacuum fluorescent display includes a cathode electrode, grid electrode, anode electrode, at least one envelope, phosphor screen, and cap. The cathode electrode emits electrons. The grid electrode extracts the electrons from the cathode electrode. The anode electrode accelerates the electrons extracted from the cathode electrode. The envelope accommodates the cathode electrode, grid electrode, and anode electrode in a vacuum space and has a phosphor screen plate having light transmission properties. The phosphor screen is formed on an inner surface of the phosphor screen plate of the envelope and adapted to emit light upon bombardment of the electrons accelerated by the anode electrode. The cap is made of an X-ray shielding material and supported outside the envelope so as to surround the phosphor screen plate of the envelope through a gap. The cap has a light exit portion from which the light emitted from the phosphor screen emerges through the phosphor screen plate of the envelope.Type: GrantFiled: August 23, 2001Date of Patent: July 5, 2005Assignee: Noritake Co., Ltd,Inventors: Sashiro Uemura, Takeshi Nagasako, Junko Yotani, Hiroyuki Kurachi, Hiromu Yamada, Tomotaka Ezaki
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Patent number: 6624566Abstract: A vacuum fluorescent display includes a front glass member, substrate, control electrode, plate-like field emission type electron-emitting source, mesh-like electron extracting electrode, and phosphor film. The front glass member has light transmission properties at least partly, and the substrate opposes the front glass member through a vacuum space. The control electrode is formed on an inner surface of the substrate. The plate-like field emission type electron-emitting source with a plurality of through holes is arranged in the vacuum space to be spaced apart from the control electrode. The mesh-like electron extracting electrode is formed between the field emission type electron-emitting source and the front glass member to be spaced apart from the field emission type electron-emitting source. The phosphor film is formed inside the front glass member.Type: GrantFiled: August 28, 2001Date of Patent: September 23, 2003Assignees: Ise Electronics Corporation, Noritake Co., Ltd.Inventors: Sashiro Uemura, Junko Yotani, Takeshi Nagasako, Hiromu Yamada, Hiroyuki Kurachi
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Publication number: 20030001478Abstract: Disclosed is an electrode for an electron source, a method for producing the same, and an electronic tube using the same which provide a decreased thickness of an electron emitting source, and an improved current distribution percentage. The electronic tube comprises a substrate, an electron emitting source area formed on the substrate, and a shield area around the electron emitting area. The shield area is formed of a material that does not produce an electron emitting source, when the electron emitting source is produced by a dry method. As a result, if a space between an electron drawing electrode and the electrode for the electron source is narrow, the percentage of anode current increases in the total current, thereby improving the current distribution percentage.Type: ApplicationFiled: June 7, 2002Publication date: January 2, 2003Inventors: Tomotaka Ezaki, Sashiro Uemura, Junko Yotani, Hiromu Yamada, Takeshi Nagasako, Hiroyuki Kurachi, Kazunori Tatsuda, Yukiharu Seko, Tsuyoshi Maesoba
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Publication number: 20020024296Abstract: A vacuum fluorescent display includes a front glass member, substrate, control electrode, plate-like field emission type electron-emitting source, mesh-like electron extracting electrode, and phosphor film. The front glass member has light transmission properties at least partly, and the substrate opposes the front glass member through a vacuum space. The control electrode is formed on an inner surface of the substrate. The plate-like field emission type electron-emitting source with a plurality of through holes is arranged in the vacuum space to be spaced apart from the control electrode. The mesh-like electron extracting electrode is formed between the field emission type electron-emitting source and the front glass member to be spaced apart from the field emission type electron-emitting source. The phosphor film is formed inside the front glass member.Type: ApplicationFiled: August 28, 2001Publication date: February 28, 2002Inventors: Sashiro Uemura, Junko Yotani, Takeshi Nagasako, Hiromu Yamada, Hiroyuki Kurachi
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Publication number: 20020024290Abstract: A vacuum fluorescent display includes a cathode electrode, grid electrode, anode electrode, at least one envelope, phosphor screen, and cap. The cathode electrode emits electrons. The grid electrode extracts the electrons from the cathode electrode. The anode electrode accelerates the electrons extracted from the cathode electrode. The envelope accommodates the cathode electrode, grid electrode, and anode electrode in a vacuum space and has a phosphor screen plate having light transmission properties. The phosphor screen is formed on an inner surface of the phosphor screen plate of the envelope and adapted to emit light upon bombardment of the electrons accelerated by the anode electrode. The cap is made of an X-ray shielding material and supported outside the envelope so as to surround the phosphor screen plate of the envelope through a gap. The cap has a light exit portion from which the light emitted from the phosphor screen emerges through the phosphor screen plate of the envelope.Type: ApplicationFiled: August 23, 2001Publication date: February 28, 2002Inventors: Sashiro Uemura, Takeshi Nagasako, Junko Yotani, Hiroyuki Kurachi, Hiromu Yamada, Tomotaka Ezaki
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Patent number: 5703326Abstract: The present invention provides an electrical connection of electrode leads externally extending from an electroluminescent light to conductors of a flexible lead one to one, characterized in that each of the electrode leads is bonded to a plurality of the conductors of the flexible lead in electrical communication. For instance, each of the electrode leads straddles two conductors in parallel, and is soldered to the two conductors. For another instance, each of the electrode leads obliquely extends from the electroluminescent light to cross over a plurality of the conductors. The invention makes it possible to make electrical contact between electrode leads and conductors of a flexible lead, even when a pitch between adjacent electrode leads is not consistent with a pitch between adjacent conductors. Thus, it is no longer necessary to prepare a specific flexible lead suitable only to a certain electroluminescent light.Type: GrantFiled: June 24, 1996Date of Patent: December 30, 1997Assignee: NEC CorporationInventors: Hiromu Yamada, Seiji Okabe
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Patent number: 5266865Abstract: A three-electrode type electroluminescent lamp has a transparent electrode connected to a rear side lead conductor, and an electroluminescent body sandwiched between the transplant electrode and the backing electrode. A third plate-like electrode is laid over the backing electrode in an electrical insulation relation with the backing electrode, and a third lead conductor is formed of an integral extension of the third electrode. The integral extension of the third electrode extends outwardly from an edge of the third electrode near to the edge region of the transparent electrode connected to the base end portion of the first lead conductor, so as to avoid the edge region of the transparent electrode on which the base end portion of the first lead conductor is laid and also to extend along the first lead conductor excluding the base end portion. A printed-wiring board having a plurality of printed wirings is mounted on the electroluminescent lamp.Type: GrantFiled: August 21, 1990Date of Patent: November 30, 1993Assignee: NEC CorporationInventors: Masahiro Haizumi, Hisahumi Tanaka, Hiromu Yamada, Kazuhisa Sawada