Patents by Inventor Koji Ikawa
Koji Ikawa 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: 8111202Abstract: A high frequency wave glass antenna for an automobile includes an antenna conductor formed in a loop shape and disposed in or an automobile window glass sheet, the antenna conductor having a discontinuity and feeding portions at both ends of the discontinuity or in the vicinity of said both ends, the discontinuity being formed of a portion of the loop shape cut by a length. The antenna conductor includes a detour in a portion of the loop shape, the detour being formed of a single or a plurality of detour elements, the detour being disposed in a position, which satisfies that a rate of a distance from a center of the discontinuity of the original loop shape to a center of the detour of the original loop shape with respect to a length of an inner peripheral edge or an outer peripheral edge of the original loop shape ranges from 0.18 to 0.4.Type: GrantFiled: March 30, 2009Date of Patent: February 7, 2012Assignee: Asahi Glass Company, LimitedInventors: Osamu Kagaya, Kotaro Suenaga, Koji Ikawa
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Publication number: 20110168788Abstract: An RFID tag has an antenna element including an antenna substrate equipped with an IC chip and a conductor pattern, an artificial medium, and a first insulation layer sandwiched between the antenna element and the artificial medium. The artificial medium has a single first conductive element placed on an upper surface of a dielectric layer and a single second conductive element placed on a lower surface of the dielectric layer.Type: ApplicationFiled: January 31, 2011Publication date: July 14, 2011Inventors: Ryuta Sonoda, Koji Ikawa, Kazuhiko Niwano, Kouji Koganezawa
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Publication number: 20110102297Abstract: An artificial medium includes: a dielectric layer having a front surface and a back surface; a plurality of first grid lines respectively formed on the front surface and the back surface and extending in a first direction and a plurality of second grid lines extending in a second direction different from the first direction; and electrically conductive elements respectively formed on the front surface and the back surface of the dielectric layer and located in areas where the first grid lines intersect the second grid lines, wherein when an electromagnetic wave propagated in the direction of the thickness of the dielectric layer is incident, a current excited by the electromagnetic wave is increased in a prescribed operating frequency and a current loop is formed in a plane parallel to the direction of the thickness.Type: ApplicationFiled: August 25, 2010Publication date: May 5, 2011Inventors: Koji Ikawa, Masahide Koga, Fuminori Watanabe, Ryuta Sonoda, Kazuhiko Niwano
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Publication number: 20110016973Abstract: To provide an acceleration sensor and a sensor network system having a construction in which the consumption of power to be consumed can be reduced and the sensor itself can be miniaturized without using any piezoelectric sensor or piezoelectric bimorph. An acceleration sensor device provided with an acceleration sensor which is an electrostatic induction conversion device for conversion between electric energy and kinetic energy, which comprises a conductor and an electret moving relatively to the conductor, said acceleration sensor device having: an acceleration detection unit to detect a signal corresponding to acceleration, from an AC voltage output by the acceleration sensor; a rectification unit to rectify the AC voltage; and a power supply circuit having a battery to power circuits in the device to work, to charge the battery with the rectified voltage as electric energy.Type: ApplicationFiled: September 29, 2010Publication date: January 27, 2011Inventors: Yoshiki HAMATANI, Yoshitomi Morizawa, Tetsuya Yanoshita, Koji Ikawa
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Patent number: 7663563Abstract: A high frequency wave glass antenna for an automobile includes an antenna conductor adapted to be disposed in or on an automobile window glass sheet, the antenna conductor being formed in such a loop shape that a portion of the loop shape is cut out by a length to dispose a discontinuity, both ends of the discontinuity or portions of the antenna conductor close to the discontinuity serving as feeding points, and a portion of the antenna conductor with the discontinuity disposed therein or a portion of the antenna conductor close to the discontinuity having a conductor width of 8.0 to 40 mm.Type: GrantFiled: March 11, 2008Date of Patent: February 16, 2010Assignee: Asahi Glass Company, LimitedInventors: Osamu Kagaya, Kiyoshi Oshima, Koji Ikawa
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Publication number: 20090243946Abstract: A high frequency wave glass antenna for an automobile includes an antenna conductor formed in a loop shape and disposed in or an automobile window glass sheet, the antenna conductor having a discontinuity and feeding portions at both ends of the discontinuity or in the vicinity of said both ends, the discontinuity being formed of a portion of the loop shape cut by a length. The antenna conductor includes a detour in a portion of the loop shape, the detour being formed of a single or a plurality of detour elements, the detour being disposed in a position, which satisfies that a rate of a distance from a center of the discontinuity of the original loop shape to a center of the detour of the original loop shape with respect to a length of an inner peripheral edge or an outer peripheral edge of the original loop shape ranges from 0.18 to 0.4.Type: ApplicationFiled: March 30, 2009Publication date: October 1, 2009Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Osamu Kagaya, Kotaro Suenaga, Koji Ikawa
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Patent number: 7446716Abstract: A display unit includes a conductive portion 1. When it is assumed that there is an imaginary straight line m1, which extends in a direction perpendicular to a longitudinal direction of a dipole antenna 2, passes through a center of the dipole antenna 2 and is parallel to an antenna surface of the dipole antenna 2, the dipole antenna 2 is disposed on a lateral side of the display unit so that the imaginary straight line m1 is parallel to a display screen, is parallel to an upper side 1a or a lower side 1b of a main surface of the conductive portion and passes a lateral portion of the conductive portion 1.Type: GrantFiled: June 13, 2006Date of Patent: November 4, 2008Assignee: Asahi Glass Company, LimitedInventors: Fuminori Watanabe, Ryuta Sonota, Koji Aoki, Koji Ikawa
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Publication number: 20080246673Abstract: A high frequency wave glass antenna for an automobile includes an antenna conductor adapted to be disposed in or on an automobile window glass sheet, the antenna conductor being formed in such a loop shape that a portion of the loop shape is cut out by a length to dispose a discontinuity, both ends of the discontinuity or portions of the antenna conductor close to the discontinuity serving as feeding points, and a portion of the antenna conductor with the discontinuity disposed therein or a portion of the antenna conductor close to the discontinuity having a conductor width of 8.0 to 40 mm.Type: ApplicationFiled: March 11, 2008Publication date: October 9, 2008Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Osamu KAGAYA, Kiyoshi Oshima, Koji Ikawa
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Patent number: 7420517Abstract: A plurality of heating wires 2 have a plurality of detours 1 formed therein, the heating wires 2 have inlets 10 formed therein for connection with the detours 1, and both ends of each of the inlets 10 and both ends of each of the detours 1 are connected by a pair of connection lines 9. When a shorter one of the shortest spacing between the paired connection lines 9 and the shortest spacing between both ends of the inlets 10 is called We, when the maximum width of the detours 1 in a horizontal direction is called Wr, when a received frequency has a wavelength of ?0 in the air, and when the formula of {(Wr?We)/2}=L1 is established, the formula of L1?0.0053·?0 is satisfied.Type: GrantFiled: April 17, 2007Date of Patent: September 2, 2008Assignee: Asahi Glass Company, LimitedInventors: Kiyoshi Oshima, Osamu Kagaya, Koji Ikawa, Toshifumi Funatsu
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Patent number: 7289075Abstract: There are disposed first coupling conductors, which comprise a pair of coupling branch lines 1 and 2 connected to the first antenna conductor 3 and extend inward from the first antenna conductor. The coupling branch lines 1 and 2 have open ends 1a and 2a disposed so as to be adjacent to each other and be capacitively coupled to each other. The open ends 1a and 2a of the coupling branch lines 1 and 2 are located at closest or substantially closest portions to each other. The second antenna conductor 13 includes second coupling conductors, which comprise a pair of coupling branch lines 11 and 12 connected the second antenna conductor 13 and extending inward from the second antenna conductor. The coupling branch lines 11 and 12 have open ends disposed so as to be adjacent to each other and be capacitively coupled to each other. The open ends of the coupling branch lines 11 and 12 are located at closest or substantially closest portions to each other.Type: GrantFiled: December 7, 2004Date of Patent: October 30, 2007Assignee: Asahi Glass Company, LimitedInventors: Osamu Kagaya, Kiyoshi Oshima, Koji Ikawa
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Publication number: 20070247379Abstract: A plurality of heating wires 2 have a plurality of detours 1 formed therein, the heating wires 2 have inlets 10 formed therein for connection with the detours 1, and both ends of each of the inlets 10 and both ends of each of the detours 1 are connected by a pair of connection lines 9. When a shorter one of the shortest spacing between the paired connection lines 9 and the shortest spacing between both ends of the inlets 10 is called We, when the maximum width of the detours 1 in a horizontal direction is called Wr, when a received frequency has a wavelength of ?0 in the air, and when the formula of {(Wr?We)/2}=L1 is established, the formula of L1?0.0053·?0 is satisfied.Type: ApplicationFiled: April 17, 2007Publication date: October 25, 2007Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Kiyoshi Oshima, Osamu Kagaya, Koji Ikawa, Toshifumi Funatsu
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Publication number: 20070080876Abstract: When it is assumed that there is a first imaginary straight line connecting between the center of gravity of the first antenna wire and the center of gravity of the second antenna wire, the first imaginary straight line is called a transverse line, and when it is assumed that there is a second imaginary line obtained by endlessly extending the transverse line, the second imaginary line is called an endless transverse line; when the center between closest portions of the first antenna wire and the second antenna wire is called an antenna center; independent conductor A is disposed on a side closer to the first antenna wire with respect to the antenna center; independent conductor B is disposed on a side closer to the second antenna wire with respect to the antenna center; and independent conductor A and independent conductor B are disposed on or in a dielectric substrate so that the endless transverse line passes through independent conductor A and independent conductor B or extends over or under independent cType: ApplicationFiled: September 27, 2006Publication date: April 12, 2007Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Osamu Kagaya, Kiyoshi Oshima, Koji Ikawa
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Patent number: 7176837Abstract: The radiating conductor in an antenna device comprises first forming elements, second forming elements and third forming elements disposed to be coupled in one direction. The first forming elements are formed in a semi-circular shape, and the third forming elements are formed in a band-like shape and have feed points disposed therein. The first forming elements, the second forming elements and the third forming elements have respective maximum lengths gradually reduced in this order.Type: GrantFiled: July 21, 2005Date of Patent: February 13, 2007Assignee: Asahi Glass Company, LimitedInventors: Ryuta Sonoda, Fuminori Watanabe, Koji Ikawa, Kazuhiko Niwano
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Publication number: 20060284772Abstract: A display unit includes a conductive portion 1. When it is assumed that there is an imaginary straight line m1, which extends in a direction perpendicular to a longitudinal direction of a dipole antenna 2, passes through a center of the dipole antenna 2 and is parallel to an antenna surface of the dipole antenna 2, the dipole antenna 2 is disposed on a lateral side of the display unit so that the imaginary straight line m1 is parallel to a display screen, is parallel to an upper side 1a or a lower side 1b of a main surface of the conductive portion and passes a lateral portion of the conductive portion 1.Type: ApplicationFiled: June 13, 2006Publication date: December 21, 2006Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Fuminori Watanabe, Ryuta Sonoda, Koji Aoki, Koji Ikawa
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Patent number: 7106256Abstract: An antenna body is configured to comprise a dielectric member including a planar radiating conductor and a feeder. The radiating conductor is configured by combining a first forming element and a second forming element so as to share one portion, the first forming element having a circular shape, and the second forming element having a semi-oval shape. The feeder is connected to the radiating conductor at a peripheral portion in the second forming element, which is located on a side of the second forming element seen from the first forming element.Type: GrantFiled: October 29, 2004Date of Patent: September 12, 2006Assignee: Asahi Glass Company, LimitedInventors: Fuminori Watanabe, Ryuta Sonoda, Koji Ikawa, Kazuhiko Niwano
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Publication number: 20060038723Abstract: An antenna body is configured to comprise a dielectric member including a planar radiating conductor and a feeder. The radiating conductor is configured by combining a first forming element and a second forming element so as to share one portion, the first forming element having a circular shape, and the second forming element having a semi-oval shape. The feeder is connected to the radiating conductor at a peripheral portion in the second forming element, which is located on a side of the second forming element seen from the first forming element.Type: ApplicationFiled: October 29, 2004Publication date: February 23, 2006Applicant: Asahi Glass Company, LimitedInventors: Fuminori Watanabe, Ryuta Sonoda, Koji Ikawa, Kazuhiko Niwano
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Publication number: 20060022876Abstract: The radiating conductor in an antenna device comprises first forming elements, second forming elements and third forming elements disposed to be coupled in one direction. The first forming elements are formed in a semi-circular shape, and the third forming elements are formed in a band-like shape and have feed points disposed therein. The first forming elements, the second forming elements and the third forming elements have respective maximum lengths gradually reduced in this order.Type: ApplicationFiled: July 21, 2005Publication date: February 2, 2006Applicant: Asahi Glass Company, LimitedInventors: Ryuta Sonoda, Fuminori Watanabe, Koji Ikawa, Kazuhiko Niwano
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Publication number: 20050128161Abstract: There are disposed first coupling conductors, which comprise a pair of coupling branch lines 1 and 2 connected to the first antenna conductor 3 and extend inward from the first antenna conductor. The coupling branch lines 1 and 2 have open ends 1a and 2a disposed so as to be adjacent to each other and be capacitively coupled to each other. The open ends 1a and 2a of the coupling branch lines 1 and 2 are located at closest or substantially closest portions to each other. The second antenna conductor 13 includes second coupling conductors, which comprise a pair of coupling branch lines 11 and 12 connected the second antenna conductor 13 and extending inward from the second antenna conductor. The coupling branch lines 11 and 12 have open ends disposed so as to be adjacent to each other and be capacitively coupled to each other. The open ends of the coupling branch lines 11 and 12 are located at closest or substantially closest portions to each other.Type: ApplicationFiled: December 7, 2004Publication date: June 16, 2005Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Osamu Kagaya, Kiyoshi Oshima, Koji Ikawa
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Patent number: 6473049Abstract: An antenna device of simple structure and high performance which is capable of lessening a reduction of a converging efficiency of radio wave due to a window glass sheet or the like to which the antenna device is fitted, and capable of obtaining a high converging efficiency to a received radio wave. The antenna device comprises a fitted member (5) having transparency, a converging member (1) for converging a radio wave, a space between the fitted member (5) and the converging member (1), and a receiving portion for receiving the radio wave converged by the converging member (1) or a transmitting portion for radiating a radio wave to the converging member (1) wherein in a case that a receive power value is changed so as to take alternately a bottom value and a peak value depending on a change of the thickness of the space, the thickness of the space is adjusted so that the received power value does not take a value in the vicinity of bottom values.Type: GrantFiled: November 30, 2001Date of Patent: October 29, 2002Assignee: Asahi Glass Company, LimitedInventors: Shoichi Takeuchi, Fuminori Watanabe, Koji Ikawa
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Publication number: 20020101390Abstract: An antenna device of simple structure and high performance which is capable of lessening a reduction of a converging efficiency of radio wave due to a window glass sheet or the like to which the antenna device is fitted, and capable of obtaining a high converging efficiency to a received radio wave. The antenna device comprises a fitted member 5 having transparency, a converging member 1 for converging a radio wave, a space between the fitted member 5 and the converging member 1, and a receiving portion for receiving the radio wave converged by the converging member 1 or a transmitting portion for radiating a radio wave to the converging member 1 wherein in a case that a receive power value is changed so as to take alternately a bottom value and a peak value depending on a change of the thickness of the space, the thickness of the space is adjusted so that the received power value does not take a value in the vicinity of bottom values.Type: ApplicationFiled: November 30, 2001Publication date: August 1, 2002Applicant: Asahi Glass Company, LimitedInventors: Shoichi Takeuchi, Fuminori Watanabe, Koji Ikawa