Patents by Inventor Naoki Kushima
Naoki Kushima 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: 10523248Abstract: A reception device according to an embodiment includes a main terminal, a sub-terminal, a demultiplexer, and a noise reducing unit. To the main terminal, a main signal is input. The main signal includes a broadcast wave. To the sub-terminal, a multiple signal is input. The multiple signal is obtained by multiplex a noise signal and a sub-signal including the broadcast wave. The demultiplexer demultiplexes the noise signal and the sub-signal from the multiple signal input from the sub-terminal. The noise reducing unit reduces a noise component included in the main signal by using the noise signal demultiplexed by the demultiplexer.Type: GrantFiled: September 8, 2017Date of Patent: December 31, 2019Assignees: FUJITSU TEN Limited, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Chinda, Kazushige Ogino, Naoki Kushima, Takuma Sawaya
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Publication number: 20180091175Abstract: A reception device according to an embodiment includes a main terminal, a sub-terminal, a demultiplexer, and a noise reducing unit. To the main terminal, a main signal is input. The main signal includes a broadcast wave. To the sub-terminal, a multiple signal is input. The multiple signal is obtained by multiplex a noise signal and a sub-signal including the broadcast wave. The demultiplexer demultiplexes the noise signal and the sub-signal from the multiple signal input from the sub-terminal. The noise reducing unit reduces a noise component included in the main signal by using the noise signal demultiplexed by the demultiplexer.Type: ApplicationFiled: September 8, 2017Publication date: March 29, 2018Applicants: FUJITSU TEN LIMITED, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi CHINDA, Kazushige OGINO, Naoki KUSHIMA, Takuma SAWAYA
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Patent number: 7277684Abstract: An object of the invention is to receive a weak signal with high sensitivity and reduce distortion and signal suppression when a strong interference signal exists. When a high-frequency signal received by an antenna is to be amplified by an antenna amplifier and when an interference wave of high field strength exists, a switch circuit is switched by an output switchover circuit from the output of an amplifier to a through-circuit. The through-circuit guides the high-frequency signal, directly to the output side without passing through the amplifier. When the switching operation of the switch circuit is performed based on low-frequency components which are highly correlated with distortion components due to intermodulation, the switching operation can be performed more adequately. Noises can be reduced by performing a smoothing process on the switching operation, and the use of an inverting amplifier can prevent occurrence of oscillation.Type: GrantFiled: April 25, 2003Date of Patent: October 2, 2007Assignee: Fujitsu Ten LimitedInventors: Naoki Kushima, Kazuo Takayama, Tetsuharu Imoto, Kazushige Ogino, Hirokazu Matsunaga, Nobuyoshi Tateishi
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Patent number: 6932620Abstract: An elastic member made of a metallic conductor is installed inside a main body. A contact head made of a conductor is pressed by a force exerted from the elastic member against an object to be contacted. The contact head is connected to a wire constituting a part of an electric conduction path. An insulator for breaking electric continuity between the elastic member and the contact head is inserted between the elastic member and the contact head. In addition to establishing electrical continuity with the object to be contacted using the wire and the contact head rather than the elastic member, the elastic member is insulated from the contact head and placed apart from the contact head to suppress parasitic capacitance between the elastic member and the contact head.Type: GrantFiled: November 22, 2004Date of Patent: August 23, 2005Assignees: Kojima Press Industry Co., Ltd., Fujitsu Ten LimitedInventors: Yozo Ishiguro, Takehiro Nomura, Shinya Iwanaga, Hideaki Tanaka, Seigen Maeno, Naoki Kushima
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Publication number: 20050118744Abstract: An elastic member made of a metallic conductor is installed inside a main body. A contact head made of a conductor is pressed by a force exerted from the elastic member against an object to be contacted. The contact head is connected to a wire constituting a part of an electric conduction path. An insulator for breaking electric continuity between the elastic member and the contact head is inserted between the elastic member and the contact head. In addition to establishing electrical continuity with the object to be contacted using the wire and the contact head rather than the elastic member, the elastic member is insulated from the contact head and placed apart from the contact head to suppress parasitic capacitance between the elastic member and the contact head.Type: ApplicationFiled: November 22, 2004Publication date: June 2, 2005Inventors: Yozo Ishiguro, Takehiro Nomura, Shinya Iwanaga, Hideaki Tanaka, Seigen Maeno, Naoki Kushima
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Patent number: 6825812Abstract: An antenna structure for vehicles capable of minimizing the distance between a first contact member and a signal processing circuit and ensuring stable antenna performance without using a connection line of a lengthy wire rod is provided. To realize this advantage, an antenna element is disposed on a rear window glass, and the first contact member is disposed at an end of the antenna element. Further, an amplifier case having an attachment flange facing the rear window glass is fixed to a roof panel, and the signal processing circuit is disposed in the amplifier case at a position sandwiching the attachment flange.Type: GrantFiled: May 29, 2003Date of Patent: November 30, 2004Assignees: Kojima Press Industry Co., LTD, Toyota Jidosha Kabushiki Kaisha, Asahi Glass Company, Limited, Nippon Sheet Glass Company, Fujitsu Ten LimitedInventors: Makoto Yokota, Minoru Yonebayashi, Hideaki Tanaka, Junzo Ooe, Kansei Mizutani, Kohji Tabata, Hidetoshi Oka, Naoki Kushima
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Publication number: 20040214545Abstract: An object of the invention is to receive a weak signal with high sensitivity and reduce distortion and signal suppression when a strong interference signal exists. When a high-frequency signal received by an antenna is to be amplified by an antenna amplifier and when an interference wave of high field strength exists, a switch circuit is switched by an output switchover circuit from the output of an amplifier to a through-circuit. The through-circuit guides the high-frequency signal, directly to the output side without passing through the amplifier. When the switching operation of the switch circuit is performed based on low-frequency components which are highly correlated with distortion components due to intermodulation, the switching operation can be performed more adequately. Noises can be reduced by performing a smoothing process on the switching operation, and the use of an inverting amplifier can prevent occurrence of oscillation.Type: ApplicationFiled: April 25, 2003Publication date: October 28, 2004Inventors: Naoki Kushima, Kazuo Takayama, Tetsuharu Imoto, Kazushige Ogino, Hirokazu Matsunaga, Nobuyoshi Tateishi
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Publication number: 20030227413Abstract: An antenna structure for vehicles capable of minimizing the distance between a first contact member and a signal processing circuit and ensuring stable antenna performance without using a connection line of a lengthy wire rod is provided. To realize this advantage, an antenna element is disposed on a rear window glass, and the first contact member is disposed at an end of the antenna element. Further, an amplifier case having an attachment flange facing the rear window glass is fixed to a roof panel, and the signal processing circuit is disposed in the amplifier case at a position sandwiching the attachment flange.Type: ApplicationFiled: May 29, 2003Publication date: December 11, 2003Applicants: Kojima Press Industry Co., Ltd., Toyota Jidosha Kabushiki Kaisha, Asahi Glass Company, Limited, Nippon Sheet Glass Company, Limited, Fujitsu Ten LimitedInventors: Makoto Yokota, Minoru Yonebayashi, Hideaki Tanaka, Junzo Ooe, Kansei Mizutani, Kohji Tabata, Hidetoshi Oka, Naoki Kushima