Patents by Inventor Takahisa Akatsuka
Takahisa Akatsuka 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: 8742273Abstract: A switch module is provided with a circuit substrate that has a metal dome sheet mounted on a surface thereof which is arranged in opposition to a key substrate, a light guiding sheet that is arranged between the key substrate and the circuit substrate, an LED, and a reflector that makes the light emitted from the LED incident into the light guiding sheet from an end thereof, wherein key parts are able to be illuminated by the switch module. At an inner side of the reflector in the light guiding sheet, there is formed a printed pattern of white ink for scattering light on an optical path of the light which transmits through a first surface from the vicinity of an edge portion of the reflector.Type: GrantFiled: October 28, 2010Date of Patent: June 3, 2014Assignee: Nippon Mektron, Ltd.Inventors: Hitoshi Uchida, Manabu Ohrui, Takahisa Akatsuka
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Patent number: 8545080Abstract: In a switch module which is arranged in opposition to a key substrate, the switch module is provided which is able to reduce an amount of light leaking out from the vicinity of an end of a light guiding member in the direction of key parts, so that the key parts can be illuminated in a uniform manner by the light which advances in the interior of the light guiding member. A switch module is provided with a circuit substrate that has a metal dome sheet mounted on a surface thereof which is arranged in opposition to a key substrate, a light guiding sheet that is arranged between the key substrate and the circuit substrate, an LED, and a reflector that makes the light emitted from the LED incident into the light guiding sheet from an end thereof, wherein key parts are able to be illuminated by the switch module.Type: GrantFiled: October 28, 2010Date of Patent: October 1, 2013Assignee: Nippon Mektron, Ltd.Inventors: Manabu Ohrui, Takahisa Akatsuka, Hitoshi Uchida, Kazuki Ozaki
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Patent number: 8367950Abstract: The key module for the mobile device includes a key top 6; a base plate 2 on which a fixed-side contact 7 is disposed; a dome 4 that is disposed on the fixed-side contact 7; a dome sheet 5 that covers the dome 4; an LED module 3 disposed on the base plate 2; and a light guide plate 1 that is disposed on the dome sheet 5. Such a configuration causes light emitted by the LED module 3 propagates within the light guide plate, and exits the light from an exit surface of the light guide plate on the key top 6 side. The light guide plate 1 is formed by inkjet printing a dot pattern in white ink onto a surface of a base material formed from a thermosetting polyurethane elastomer sheet, which surface is opposite to the exit surface of the light guide plate.Type: GrantFiled: March 9, 2009Date of Patent: February 5, 2013Assignee: Nippon Mektron, Ltd.Inventors: Kazuyuki Ozaki, Takahisa Akatsuka, Toshihiro Yanagimori, Hiroaki Takada
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Publication number: 20120193200Abstract: A switch module is provided with a circuit substrate that has a metal dome sheet mounted on a surface thereof which is arranged in opposition to a key substrate, a light guiding sheet that is arranged between the key substrate and the circuit substrate, an LED, and a reflector that makes the light emitted from the LED incident into the light guiding sheet from an end thereof, wherein key parts are able to be illuminated by the switch module. At an inner side of the reflector in the light guiding sheet, there is formed a printed pattern of white ink for scattering light on an optical path of the light which transmits through a first surface from the vicinity of an edge portion of the reflector.Type: ApplicationFiled: October 28, 2010Publication date: August 2, 2012Applicant: Nippon Mektron, Ltd.Inventors: Hitoshi Uchida, Manabu Ohrui, Takahisa Akatsuka
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Publication number: 20120182760Abstract: In a switch module which is arranged in opposition to a key substrate, the switch module is provided which is able to reduce an amount of light leaking out from the vicinity of an end of a light guiding member in the direction of key parts, so that the key parts can be illuminated in a uniform manner by the light which advances in the interior of the light guiding member. A switch module is provided with a circuit substrate that has a metal dome sheet mounted on a surface thereof which is arranged in opposition to a key substrate, a light guiding sheet that is arranged between the key substrate and the circuit substrate, an LED, and a reflector that makes the light emitted from the LED incident into the light guiding sheet from an end thereof, wherein key parts are able to be illuminated by the switch module.Type: ApplicationFiled: October 28, 2010Publication date: July 19, 2012Applicant: Nippon Mektron, Ltd.Inventors: Manabu Ohrui, Takahisa Akatsuka, Hitoshi Uchida, Kazuyuki Ozaki
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Publication number: 20110017580Abstract: The key module for the mobile device includes a key top 6; a base plate 2 on which a fixed-side contact 7 is disposed; a dome 4 that is disposed on the fixed-side contact 7; a dome sheet 5 that covers the dome 4; an LED module 3 disposed on the base plate 2; and a light guide plate 1 that is disposed on the dome sheet 5. Such a configuration causes light emitted by the LED module 3 propagates within the light guide plate, and exits the light from an exit surface of the light guide plate on the key top 6 side. The light guide plate 1 is formed by inkjet printing a dot pattern in white ink onto a surface of a base material formed from a thermosetting polyurethane elastomer sheet, which surface is opposite to the exit surface of the light guide plate.Type: ApplicationFiled: March 9, 2009Publication date: January 27, 2011Applicant: NIPPON MEKTRON, LTD.Inventors: Kazuyuki Ozaki, Takahisa Akatsuka, Toshihiro Yanagimori, Hiroaki Takada
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Patent number: 7709750Abstract: The invention includes a shielding film, which does not have breakage of a metal layer, and has excellent abrasion resistance and blocking resistance, and does not crack. The cover film 7 is provided on one surface of a separation film 6a, and an adhesive layer 8a is formed on the surface of the cover film 7 opposite to the separation film 6a via the metal layer. The cover film 7 has at least one hard layer 7a and at least one soft layer 7b, and the surface of the cover film 7 facing the separation film 6a is composed of the hard layer 7a.Type: GrantFiled: May 10, 2006Date of Patent: May 4, 2010Assignees: Tatsuta System Electronics Co, Ltd., Nippon Mektron, Ltd.Inventors: Kazuhiro Hashimoto, Syohei Morimoto, Yoshinori Kawakami, Kenji Kamino, Satoshi Ebihara, Hideaki Tanaka, Takahisa Akatsuka
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Publication number: 20090038839Abstract: The invention includes a shielding film, which does not have breakage of a metal layer, and has excellent abrasion resistance and blocking resistance, and does not crack. The cover film 7 is provided on one surface of a separation film 6a, and an adhesive layer 8a is formed on the surface of the cover film 7 opposite to the separation film 6a via the metal layer. The cover film 7 has at least one hard layer 7a and at least one soft layer 7b, and the surface of the cover film 7 facing the separation film 6a is composed of the hard layer 7a.Type: ApplicationFiled: May 10, 2006Publication date: February 12, 2009Applicants: TATSUTA SYSTEM ELECTRONICS Co., LTD, NIPPON MEKTRON, LTDInventors: Kazuhiro Hashimoto, Syohei Morimoto, Yoshinori Kawakami, Kenji Kamino, Satoshi Ebihara, Hideaki Tanaka, Takahisa Akatsuka
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Patent number: 4849133Abstract: A PTC composition comprising at least one polymer, from 5% to 45% by volume of electrically conductive or semiconductive particles having a room temperature electric conductivity of at least 10.sup.2 [s/m] dispersed in said polymer, and from 0.2% to 20% by volume of thermally conductive particles having a room temperature electric conductivity of no more than 10.sup.-3 [s/m] and a thermal conductivity of at least 20 [w/m.multidot.k] dispersed in said polymer. A PTC device using such a PTC composition has a high ratio of peak resistance to room temperature resistance, and exhibits high safety.Type: GrantFiled: February 26, 1987Date of Patent: July 18, 1989Assignee: Nippon Mektron, Ltd.Inventors: Shingo Yoshida, Takahisa Akatsuka, Osamu Inoue, Jiro Toyama