Patents by Inventor Yasuhide Iwamoto
Yasuhide Iwamoto 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: 7941103Abstract: A duplexer includes a transmit filter of a ladder type filter, connected between a common terminal and a transmitting terminal, and a receive filter of the ladder type filter, connected between the common terminal and a receiving terminal. One or more parallel resonators in the transmit filter are grounded through a transmitting inductance, and a portion of multiple parallel resonators are grounded through a first receiving inductance and a remaining portion of the multiple parallel resonators are grounded through a second receiving inductance.Type: GrantFiled: November 14, 2006Date of Patent: May 10, 2011Assignee: Taiyo Yuden Co., Ltd.Inventors: Yasuhide Iwamoto, Jun Tsutsumi, Masafumi Iwaki, Masanori Ueda
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Patent number: 7684764Abstract: A duplexer includes two surface acoustic wave (SAW) filters having different center frequencies; a phase matching circuit that matches phases of the two SAW filters; a package in which the SAW filters and the phase matching circuit are housed, the package being composed of multiple layers; and a line pattern provided between at least one of the SAW filters and at least one of a transmit terminal and a receive terminal of the duplexer. The line pattern runs on at least two of the multiple layers within a range defined by peripheral ground patterns provided in the package.Type: GrantFiled: April 29, 2004Date of Patent: March 23, 2010Assignees: Fujitsu Media Devices Limited, Fujitsu LimitedInventors: Yasuhide Iwamoto, Shogo Inoue, Jun Tsutsumi
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Patent number: 7629863Abstract: A duplexer includes: a first filter that is connected to a common terminal and a first terminal, and includes a first series-arm resonator; a second filter that is connected to the common terminal and a second terminal; a first inductor that is connected in parallel to the first series-arm resonator; a mounting unit that has the first filter and the second filter mounted thereon; a first inductor line that is provided on the mounting unit, and connects the first inductor and the first series-arm resonator; and a first terminal line that is provided on the mounting unit, and connects the first filter and the first terminal. In this duplexer, the directions of currents flowing through the first inductor line and the first terminal line cross each other.Type: GrantFiled: May 17, 2007Date of Patent: December 8, 2009Assignees: Fujitsu Media Devices Limited, Fujitsu LimitedInventors: Yasuhide Iwamoto, Shogo Inoue, Masanori Ueda, Seiichi Mitobe
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Patent number: 7579927Abstract: A duplexer includes: a transmission filter and a reception filter that have different band center frequencies from each other; a phase matching circuit that performs phase matching on the transmission filter and the reception filter; and a laminated package that includes a first layer on which the transmission filter, the reception filter, and the phase matching circuit are mounted. In this duplexer, the first layer includes a first ground line pattern that is connected to a ground of the transmission filter, a second ground line pattern that is connected to a ground of the reception filter, a third ground line pattern that is connected to a ground of the phase matching circuit, and signal line patterns. The laminated package also includes a second layer that is located below the first layer. The second layer includes a partition ground line pattern that is located between the signal line patterns, a signal foot pad for external connection, and a ground foot pad.Type: GrantFiled: December 2, 2005Date of Patent: August 25, 2009Assignees: Fujitsu Media Devices Limited, Fujitsu LimitedInventors: Yasuhide Iwamoto, Shogo Inoue, Masanori Ueda
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Patent number: 7548135Abstract: A filter includes a filter chip, a laminated portion on which the filter chip is mounted, an input/output terminal provided in the laminated portion, a first U-shaped line pattern provided on a first layer and coupled to the filter chip, the first layer being included in the laminated portion between the filter chip and the input/output terminal, and a second U-shaped line pattern provided on a second layer to substantially overlap the first U-shaped line pattern and coupled to the first U-shaped line pattern and the input/output terminal, the second layer being included in the laminated portion between the first layer and the input/output terminal.Type: GrantFiled: April 20, 2006Date of Patent: June 16, 2009Assignees: Fujitsu Media Devices, Fujitsu LimitedInventors: Yasuhide Iwamoto, Shogo Inoue, Masanori Ueda
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Patent number: 7522156Abstract: Laser light emitted by a light emitting element is made parallel light by a collimation lens, passes through an aperture of an aperture mirror, and is then angularly scanned in a plane substantially parallel to a display screen by rotation of a polygon mirror and projected onto a recurrence reflection sheet. Then, after the reflected light from the recurrence reflection sheet is reflected by the polygon mirror and aperture mirror, the light is focused by a condenser lens to enter a light receiving element. The aperture mirror has an asymmetrical shape in the scanning direction and/or the vertical direction about the optical axis, according to a scanning surface opening width of the polygon mirror.Type: GrantFiled: June 7, 2001Date of Patent: April 21, 2009Assignee: Fujitsu LimitedInventors: Satoshi Sano, Yasuhide Iwamoto, Fumihiko Nakazawa, Nobuyasu Yamaguchi
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Patent number: 7479846Abstract: A duplexer that includes: a transmission filter and a reception filter that are connected to a common terminal; and a reactance circuit that is connected to at least one of the transmission filter and the reception filter. The reactance circuit includes an insulating substrate, lumped-constant inductors, and at least one capacitor. The lumped-constant inductors and the capacitor are formed directly on the surface of the insulating substrate.Type: GrantFiled: November 1, 2005Date of Patent: January 20, 2009Assignees: Fujitsu Media Devices Limited, Fujitsu LimitedInventors: Shogo Inoue, Yasuhide Iwamoto, Takashi Matsuda, Masanori Ueda
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Publication number: 20070268091Abstract: A duplexer includes: a first filter that is connected to a common terminal and a first terminal, and includes a first series-arm resonator; a second filter that is connected to the common terminal and a second terminal; a first inductor that is connected in parallel to the first series-arm resonator; a mounting unit that has the first filter and the second filter mounted thereon; a first inductor line that is provided on the mounting unit, and connects the first inductor and the first series-arm resonator; and a first terminal line that is provided on the mounting unit, and connects the first filter and the first terminal. In this duplexer, the directions of currents flowing through the first inductor line and the first terminal line cross each other.Type: ApplicationFiled: May 17, 2007Publication date: November 22, 2007Inventors: Yasuhide Iwamoto, Shogo Inoue, Masanori Ueda, Seiichi Mitobe
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Patent number: 7276992Abstract: An antenna duplexer includes two surface acoustic wave filters having different center frequencies and a phase matching circuit that matches phases of the two surface acoustic wave filters. A matching line pattern is provided on at least two layers between the two surface acoustic wave filters and transmission and reception terminals, and within an area specified by a sheet-like ground in a multilayered package, the multilayered package comprising multiple layers including a bonding layer on which wire bonding pads are provided for connecting to the two surface acoustic wave filters, and the matching line pattern having no portion provided on bonding layer.Type: GrantFiled: April 26, 2005Date of Patent: October 2, 2007Assignees: Fujitsu Media Devices Limited, Fujitsu LimitedInventors: Yasuhide Iwamoto, Shogo Inoue, Jun Tsutsumi, Masanori Ueda
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Publication number: 20070111674Abstract: A duplexer includes a transmit filter of a ladder type filter, connected between a common terminal and a transmitting terminal, and a receive filter of the ladder type filter, connected between the common terminal and a receiving terminal. One or more parallel resonators in the transmit filter are grounded through a transmitting inductance, and a portion of multiple parallel resonators are grounded through a first receiving inductance and a remaining portion of the multiple parallel resonators are grounded through a second receiving inductance.Type: ApplicationFiled: November 14, 2006Publication date: May 17, 2007Inventors: Yasuhide Iwamoto, Jun Tsutsumi, Masafumi Iwaki, Masanori Ueda
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Publication number: 20070046395Abstract: A duplexer includes a first filter connected to a common terminal, a second filter connected to the common terminal, an additional inductor connected between at least one of the first and second filters and ground, a matching-use inductor connected between the common terminal and the ground, and a capacitor connected between the common terminal and at least one of the first and second filters.Type: ApplicationFiled: August 25, 2006Publication date: March 1, 2007Inventors: Jun Tsutsumi, Masafumi Iwaki, Yasuhide Iwamoto, Masanori Ueda
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Patent number: 7135944Abstract: A duplexer includes two surface acoustic wave filter having different band center frequencies, and a phase matching circuit that matches the phases of the two surface acoustic wave filters to each other. In this duplexer, one of the two surface acoustic wave filters is a ladder type surface acoustic wave filter, while the other one of the two surface acoustic wave filters includes two or more dual-mode type surface acoustic wave filters that are connected in parallel.Type: GrantFiled: October 17, 2002Date of Patent: November 14, 2006Assignees: Fujitsu Media Devices Limited, Fujitsu LimitedInventors: Yasuhide Iwamoto, Shogo Inoue, Osamu Ikata, Jun Tsutsumi
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Publication number: 20060238272Abstract: A filter includes a filter chip, a laminated portion on which the filter chip is mounted, an input/output terminal provided in the laminated portion, a first U-shaped line pattern provided on a first layer and coupled to the filter chip, the first layer being included in the laminated portion between the filter chip and the input/output terminal, and a second U-shaped line pattern provided on a second layer to substantially overlap the first U-shaped line pattern and coupled to the first U-shaped line pattern and the input/output terminal, the second layer being included in the laminated portion between the first layer and the input/output terminal.Type: ApplicationFiled: April 20, 2006Publication date: October 26, 2006Inventors: Yasuhide Iwamoto, Shogo Inoue, Masanori Ueda
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Patent number: 7075054Abstract: The position of a light blocking object is detected not only within a display screen, but also outside the display screen. With the use of the function of detecting the position in a region outside the display screen, it becomes possible to provide virtual buttons in this region and detect dust around a light retro-reflector. Dirt on the light retro-reflector is detected based on the levels of light receiving signals of optical units.Type: GrantFiled: May 19, 2004Date of Patent: July 11, 2006Assignee: Fujitsu LimitedInventors: Yasuhide Iwamoto, Satoshi Sano, Fumihiko Nakazawa, Nobuyasu Yamaguchi
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Publication number: 20060132260Abstract: A duplexer includes: a transmission filter and a reception filter that have different band center frequencies from each other; a phase matching circuit that performs phase matching on the transmission filter and the reception filter; and a laminated package that includes a first layer on which the transmission filter, the reception filter, and the phase matching circuit are mounted. In this duplexer, the first layer includes a first ground line pattern that is connected to a ground of the transmission filter, a second ground line pattern that is connected to a ground of the reception filter, a third ground line pattern that is connected to a ground of the phase matching circuit, and signal line patterns. The laminated package also includes a second layer that is located below the first layer. The second layer includes a partition ground line pattern that is located between the signal line patterns, a signal foot pad for external connection, and a ground foot pad.Type: ApplicationFiled: December 2, 2005Publication date: June 22, 2006Inventors: Yasuhide Iwamoto, Shogo Inoue, Masanori Ueda
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Patent number: 7053731Abstract: A duplexer includes two surface acoustic wave (SAW) filters having different center frequencies, a phase matching circuit that matches phases of the two SAW filters, a package in which the SAW filters and the phase matching circuit are housed, the package having a die-attached layer on which a chip of the SAW filters is facedown mounted, and ground line patterns provided on the die-attached layer and an underlying layer that underlies the die-attached layer, the ground line patterns forming inductances.Type: GrantFiled: April 19, 2004Date of Patent: May 30, 2006Assignees: Fujitsu Media Devices, Limited, Fujitsu LimitedInventors: Yasuhide Iwamoto, Takashi Matsuda
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Publication number: 20060091977Abstract: A duplexer that includes: a transmission filter and a reception filter that are connected to a common terminal; and a reactance circuit that is connected to at least one of the transmission filter and the reception filter. The reactance circuit includes an insulating substrate, lumped-constant inductors, and at least one capacitor. The lumped-constant inductors and the capacitor are formed directly on the surface of the insulating substrate.Type: ApplicationFiled: November 1, 2005Publication date: May 4, 2006Inventors: Shogo Inoue, Yasuhide Iwamoto, Takashi Matsuda, Masanori Ueda
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Publication number: 20050237130Abstract: An antenna duplexer includes two surface acoustic wave filters having different center frequencies and a phase matching circuit that matches phases of the two surface acoustic wave filters. A matching line pattern is provided on at least two layers between the two surface acoustic wave filters and transmission and reception terminals, and within an area specified by a sheet-like ground in a multilayered package, the multilayered package comprising multiple layers including a bonding layer on which wire bonding pads are provided for connecting to the two surface acoustic wave filters, and the matching line pattern having no portion provided on bonding layer.Type: ApplicationFiled: April 26, 2005Publication date: October 27, 2005Inventors: Yasuhide Iwamoto, Shogo Inoue, Jun Tsutsumi, Masanori Ueda
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Patent number: 6927386Abstract: The position of a light blocking object is detected not only within a display screen, but also outside the display screen. With the use of the function of detecting the position in a region outside the display screen, it becomes possible to provide virtual buttons in this region and detect dust around a light retro-reflector. Dirt on the light retro-reflector is detected based on the levels of light receiving signals of optical units.Type: GrantFiled: May 19, 2004Date of Patent: August 9, 2005Assignee: Fujitsu LimitedInventors: Yasuhide Iwamoto, Satoshi Sano, Fumihiko Nakazawa, Nobuyasu Yamaguchi
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Patent number: 6919778Abstract: A duplexer includes a multilayer package, SAW filters that have different band center frequencies and are provided in the multilayer package, and a phase matching line that matches phases of the SAW filters and are provided in the multilayer package. A ground pattern with respect to the phase matching line is provided on a mount surface of the multilayer package.Type: GrantFiled: November 18, 2002Date of Patent: July 19, 2005Assignee: Fujitsu Media Devices LimitedInventors: Yasuhide Iwamoto, Osamu Ikata