Patents by Inventor Yoshihiko Tanji
Yoshihiko Tanji 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: 6774817Abstract: A reflection multiplier radio wave marker system which comprises a plurality of transmit antennas mounted on board a vehicle for transmitting electric wave signals in a first frequency; a reflection multiplier radio wave marker installed in the surface of a road, which reflects and transmits the electric wave signal of first frequency after multiplying it into an electric wave signal of a second frequency; and a receive antenna mounted on board the vehicle for receiving the electric wave of second frequency. The system specifies the location of a vehicle in a traffic lane by making use of the second frequency electric wave signal reached from a marker. It can detect a marker throughout substantially the entire width range of a vehicle. A traffic system using the marker system is also disclosed. The function of specifying the location of a radio wave marker is performed throughout the entire vehicle width.Type: GrantFiled: May 29, 2002Date of Patent: August 10, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiko Tanji, Satoru Handa
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Patent number: 6757087Abstract: An optical display provided with a hologram element and a light source, wherein the hologram is a reflection hologram formed by a light beam which is obtained by utilizing light passing through a slit and has information on an object and a reference light beam which has an incident ligth path different from that of the light having the information on an object, and the reproduced image of the object is displayed using the light from the light source.Type: GrantFiled: January 4, 2000Date of Patent: June 29, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinao Taketomi, Toshihiro Kubota, Yoshihiko Tanji, Zenrou Hayashi
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Publication number: 20040051430Abstract: An electromagnetic-wave marker includes a bar-like receiving antenna for receiving an electromagnetic wave, a frequency converting circuit coupled to the receiving antenna and for multiplying a frequency of the electromagnetic wave, a disc-like transmitting antenna for transmitting an electromagnetic wave of which frequency is multiplied by the frequency converting circuit, a nonmagnetic container for accommodating and placing the receiving antenna and the transmitting antenna such that the received electromagnetic wave and the transmitting electromagnetic wave intersect with each other at right angles, and an electromagnetic-wave reflector placed at a lower portion of the nonmagnetic container and for reflecting the electromagnetic wave along the transmitted direction. The marker is improved its anti-corrosion property, and at the same time, reduces its thickness, so that the marker can be laid down in various structures of roads such as an iron bridge.Type: ApplicationFiled: June 10, 2003Publication date: March 18, 2004Inventors: Satoru Handa, Keiji Yasui, Koichi Nomura, Yoshihiko Tanji
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Patent number: 6577246Abstract: The level of the electromagnetic waves transmitted by resonance of an electric resonator is only one hundredth that of calling radio waves of the detector. Furthermore, when an IC is mounted on the electric resonator and a modulated information code is superposed, the level of the superimposed electromagnetic waves further declines. As a result, sufficient detection directivity and detection distance could not be obtained. To address these problems, the present invention stores a cyclic coil and a capacitor used to cause an electric resonance in response to the first frequency in a sealed non-magnetic container to prevent degradation.Type: GrantFiled: April 21, 2001Date of Patent: June 10, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Satoru Handa, Yoshihiko Tanji, Akira Nakatsuka
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Patent number: 6518884Abstract: An electric resonance element includes an electric resonator comprising a coil wound around magnetic materials and a capacitor. The electric resonance element is housed in a vessel made of non-magnetic materials. A detection apparatus for detecting the electric resonance element comprises a transmitter for transmitting an electromagnetic wave and a receiver for detecting the echo wave transmitted from the electric resonance element. A moving vehicle is controlled using a system which comprises the electric resonance element buried in a road, and the detection apparatus installed on a vehicle for detecting echo waves transmitted from electric resonance elements. The detection apparatus comprises a transmitter for transmitting an electromagnetic wave specific to the electric resonance element, a receiver that detects the echo wave, and a element or a circuit to suspend the operation of the receiver while the transmitter is on duty.Type: GrantFiled: March 29, 1999Date of Patent: February 11, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiko Tanji, Keiji Yasui, Toshihiro Yoshioka
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Publication number: 20020193919Abstract: A reflection multiplier radio wave marker system which comprises a plurality of transmit antennas mounted on board a vehicle for transmitting electric wave signals in a first frequency; a reflection multiplier radio wave marker installed in the surface of a road, which reflects and transmits the electric wave signal of first frequency after multiplying it into an electric wave signal of a second frequency; and a receive antenna mounted on board the vehicle for receiving the electric wave of second frequency. The system specifies the location of a vehicle in a traffic lane by making use of the second frequency electric wave signal reached from a marker. It can detect a marker throughout substantially the entire width range of a vehicle. A traffic system using the marker system is also disclosed. The function of specifying the location of a radio wave marker is performed throughout the entire vehicle width.Type: ApplicationFiled: May 29, 2002Publication date: December 19, 2002Inventors: Yoshihiko Tanji, Satoru Handa
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Publication number: 20020171549Abstract: A reflection multiplier radio wave marker, the transmit antenna of which is comprised of a coil either one of two types, wound clockwise or anti-clockwise, so that the transmit electric wave can be reversed in phase by approximately 180°. A marker system and a traffic system using the marker are also disclosed in the present invention.Type: ApplicationFiled: May 14, 2002Publication date: November 21, 2002Inventors: Yoshihiko Tanji, Satoru Handa, Akira Nakatsuka
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Publication number: 20020149493Abstract: An information transmitting/receiving apparatus which can be embedded in a paved road, the apparatus comprising:Type: ApplicationFiled: March 27, 2002Publication date: October 17, 2002Inventors: Yukihiko Yudate, Morikuni Yamamoto, Yoshihiko Tanji, Satoru Handa
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Patent number: 6407676Abstract: A first magnetostrictive member 1a is housed in a storage section 2f of a first frame 2a and a second magnetostrictive member 1b is housed in a storage section 2g of a second frame 2b. They are fixed by an adhesive, etc., so as to sandwich a belt-like magnetic member 3 between the frames 2a and 2b. A sealing plate 4a, 4b is fixed to the opposite side of the frame 2a, 2b, forming a magnetostrictive resonator 5. When an electromagnetic wave is applied from the long side direction of the magnetostrictive member 1a, 1b, a magnetic field is applied to the magnetostrictive members 1a and 1b. When the frequency matches the resonance frequency of the magnetostrictive member, the magnetostrictive resonator 5 vibrates with the maximum amplitude. An electromagnetic wave emitted from the magnetostrictive member 1a or 1b can be detected based on mechanical vibration continuing for a short time still after the magnetic field is stopped.Type: GrantFiled: August 27, 1998Date of Patent: June 18, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiko Tanji, Toshihiro Yoshioka, Joji Kamata
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Patent number: 6377370Abstract: An optical display apparatus is provided that can utilize a low intensity point light source and that requires a small physical profile. The optical display apparatus comprises an image display apparatus including at least one point light source to form an image to be displayed for viewing, a hologram screen that defracts and reflects light from the point light source, and an imaging optical system arranged to adjust a focus in one direction of the image so that the point light source of the optical display apparatus is focused to a line on the hologram screen. The optical display apparatus reconstructs and images the image displayed on the image display apparatus on a virtual display plane.Type: GrantFiled: September 8, 2000Date of Patent: April 23, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshinao Taketomi, Toshihiro Kubota, Yoshihiko Tanji, Zenrou Hayashi
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Patent number: 6100821Abstract: A magnetostrictive resonator detection apparatus includes a transmission section for transmitting a resonance frequency of a magnetostrictive resonator, and a reception section for detecting a resonance frequency oscillated by the magnetostrictive resonator.Type: GrantFiled: June 12, 1998Date of Patent: August 8, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiko Tanji, Toshihiro Yoshioka
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Patent number: 6097312Abstract: While transmitting an electromagnetic wave from a transmitting antenna to, for example, a magnetostrictive resonator, buried in a road, a reception section composed of a reception amplifier and signal processor is inactivated. After stopping transmission of the electromagnetic wave, the reception section is activated and a receiving antenna detects an electromagnetic wave radiated by the magnetostrictive resonator. In this method, a magnetostrictive resonator detection apparatus having a sufficient directivity and detection distance can be presented. The magnetostrictive resonator detection apparatus applying this detecting method is mounted aboard a vehicle, and a plurality of magnetostrictive resonators are buried in the road. By sequentially transmitting and receiving electromagnetic waves at different resonance frequencies thereof, and judging the configuration of the road and the vehicle, a safe traffic system is presented.Type: GrantFiled: November 30, 1998Date of Patent: August 1, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiko Tanji, Toshihiro Yoshioka, Keiji Yasui
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Patent number: 5701011Abstract: A radiographic apparatus is provided which is capable of converting an X-ray directly into an electric signal, high in resolution and detection efficiency, and easy to manufacture. On at least one surface of a compound semiconductor substrate for generating an electric charge by X-ray irradiation, a plurality of split electrodes are disposed, and electrodes are disposed on picture elements formed on a CCD corresponding to these split electrodes, and are electrically connected to CdTe as compound semiconductor substrate and the CCD. An electric current issued from the split electrodes is divided, and is partly discharged through grounding wires.Type: GrantFiled: May 30, 1996Date of Patent: December 23, 1997Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Koichi Ohmori, Toshiyoshi Yamamoto, Yuji Matsuda, Yoshihiko Tanji, Takayoshi Yuuzu