Patents by Inventor Kunihide Fujii
Kunihide Fujii 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: 8818312Abstract: A method for a communication device includes determining whether a first radio frequency (RF) signal at a level of at least a first predetermined field threshold is detected. The method also includes generating a second RF signal at a level of at least a second predetermined field threshold greater than the first predetermined field threshold, when the communication device receives an instruction to generate the second RF signal and the determining determines that the first RF signal at the level of at least the first predetermined field threshold is not detected. The method further includes receiving a load modulated RF signal in response to the second RF signal.Type: GrantFiled: September 13, 2012Date of Patent: August 26, 2014Assignee: Sony CorporationInventors: Kunihide Fujii, Tadashi Morita, Shigeru Arisawa, Yoshihisa Takayama
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Patent number: 8514688Abstract: An RF (radio frequency) signal is generated at a first communication device and is modulated. A second RF signal provided to the first communication device from the second communication device is demodulated. The second RF signal is detected. The generating is actuated to initiate an active or a passive mode communication, when the detecting does not detect the second RF signal at a level of a first threshold or more, the active mode including a transmission of modulated data at the first communication device and the second communication device, the passive mode providing load modulated communication from the second communication device to the first communication device. When the first communication device receives an indication to start a communication of the active mode from the second communication device, the demodulating receives data at a level of a second threshold or higher, the second threshold being higher than the first threshold.Type: GrantFiled: December 8, 2003Date of Patent: August 20, 2013Assignee: Sony CorporationInventors: Kunihide Fujii, Tadashi Morita, Shigeru Arisawa, Yoshihisa Takayama
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Patent number: 8417184Abstract: A communication system and communication method enable various types of near field communication. NFC communication apparatuses have two features in that each can perform communication in two communication modes and that each can perform data transmission at a plurality of transfer rates. The two communication modes consist of a passive mode and an active mode. In the passive mode, between the NFC communication apparatuses, for example, a first NFC communication apparatus transmits data to a second NFC communication apparatus by modulating electromagnetic waves generated by itself, while the second NFC communication apparatus transmits data to the first NFC communication apparatus by performing load modulation on the electromagnetic waves generated by the first NFC communication apparatus. Alternatively, in the active mode, either of the NFC communication apparatuses transmits data by modulating electromagnetic waves generated by itself.Type: GrantFiled: May 21, 2012Date of Patent: April 9, 2013Assignee: Sony CorporationInventors: Yoshihisa Takayama, Susumu Kusakabe, Kazushige Tsurumi, Tadashi Morita, Kunihide Fujii
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Patent number: 8379617Abstract: A communication system includes a wired communication device and a communication device that can communicate with a wireless communication device and the wired communication device. The communication device includes a clock output unit and a modulator. The wired communication device includes a clock extracting unit, a signal extracting unit, and a processing unit. The communication device and the wired communication device are connected to each other by a first connecting line through which a modulated signal is sent from the communication device to the wired communication device, and a second connecting line, which is different from the first connecting line, through which a signal is sent from the wired communication device to the communication device.Type: GrantFiled: November 2, 2010Date of Patent: February 19, 2013Assignee: Sony CorporationInventor: Kunihide Fujii
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Publication number: 20130005287Abstract: A method for a communication device includes determining whether a first radio frequency (RF) signal at a level of at least a first predetermined field threshold is detected. The method also includes generating a second RF signal at a level of at least a second predetermined field threshold greater than the first predetermined field threshold, when the communication device receives an instruction to generate the second RF signal and the determining determines that the first RF signal at the level of at least the first predetermined field threshold is not detected. The method further includes receiving a load modulated RF signal in response to the second RF signal.Type: ApplicationFiled: September 13, 2012Publication date: January 3, 2013Applicant: SONY CORPORATIONInventors: Kunihide Fujii, Tadashi Morita, Shigeru Arisawa, Yoshihisa Takayama
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Publication number: 20120231735Abstract: A communication system and communication method enable various types of near field communication. NFC communication apparatuses have two features in that each can perform communication in two communication modes and that each can perform data transmission at a plurality of transfer rates. The two communication modes consist of a passive mode and an active mode. In the passive mode, between the NFC communication apparatuses, for example, a first NFC communication apparatus transmits data to a second NFC communication apparatus by modulating electromagnetic waves generated by itself, while the second NFC communication apparatus transmits data to the first NFC communication apparatus by performing load modulation on the electromagnetic waves generated by the first NFC communication apparatus. Alternatively, in the active mode, either of the NFC communication apparatuses transmits data by modulating electromagnetic waves generated by itself.Type: ApplicationFiled: May 21, 2012Publication date: September 13, 2012Applicant: SONY CORPORATIONInventors: Yoshihisa TAKAYAMA, Susumu Kusakabe, Kazushige Tsurumi, Tadashi Morita, Kunihide Fujii
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Patent number: 8224243Abstract: A communication system performs, by first and second data processing apparatuses, an electromagnetic-induction communication using a carrier having a single frequency. A transfer rate for use between the first and second data processing apparatuses is changeable in one transaction. The first data processing apparatus determines whether a transfer rate can be changed based on data transmitted from the second data processing apparatus. When the first data processing apparatus determines that the transfer rate can be changed, the first data processing apparatus transmits to the second data processing apparatus a request to change the transfer rate to one of a plurality of transfer rates.Type: GrantFiled: December 12, 2007Date of Patent: July 17, 2012Assignee: Sony CorporationInventors: Yoshihisa Takayama, Susumu Kusakabe, Kazushige Tsurumi, Tadashi Morita, Kunihide Fujii
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Patent number: 8200153Abstract: A communication system performs, by first and second data processing apparatuses, an electromagnetic-induction communication using a carrier having a single frequency. A transfer rate for use between the first and second data processing apparatuses is changeable in one transaction. The first data processing apparatus determines whether a transfer rate can be changed based on data transmitted from the second data processing apparatus. When the first data processing apparatus determines that the transfer rate can be changed, the first data processing apparatus transmits to the second data processing apparatus a request to change the transfer rate to one of a plurality of transfer rates.Type: GrantFiled: December 12, 2007Date of Patent: June 12, 2012Assignee: Sony CorporationInventors: Yoshihisa Takayama, Susumu Kusakabe, Kazushige Tsurumi, Tadashi Morita, Kunihide Fujii
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Publication number: 20110044396Abstract: A communication system includes a wired communication device and a communication device that can communicate with a wireless communication device and the wired communication device. The communication device includes a clock output unit and a modulator. The wired communication device includes a clock extracting unit, a signal extracting unit, and a processing unit. The communication device and the wired communication device are connected to each other by a first connecting line through which a modulated signal is sent from the communication device to the wired communication device, and a second connecting line, which is different from the first connecting line, through which a signal is sent from the wired communication device to the communication device.Type: ApplicationFiled: November 2, 2010Publication date: February 24, 2011Applicant: Sony CorporationInventor: Kunihide Fujii
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Patent number: 7872995Abstract: A communication system includes first and second communication devices that carry out wireless communication. The first communication device includes a setter configured to set a first indication mode and a corresponding second indication mode, a sender configured to send data representing the second indication mode to the second communication device when communication has been established with the second communication device, and a first indicator configured to indicate the establishment of communication in the first indication mode, correspondingly to indication in the second indication mode by the second communication device. The second communication device includes a receiver configured to receive the data representing the second indication mode, and a second indicator configured to indicate the establishment of communication in the second indication mode, correspondingly to the indication in the first indication mode by the first communication device.Type: GrantFiled: September 11, 2006Date of Patent: January 18, 2011Assignee: Sony CorporationInventors: Kunihide Fujii, Kazuyuki Sakamoto
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Patent number: 7835338Abstract: A communication system includes a wired communication device and a communication device that can communicate with a wireless communication device and the wired communication device. The communication device includes a clock output unit and a modulator. The wired communication device includes a clock extracting unit, a signal extracting unit, and a processing unit. The communication device and the wired communication device are connected to each other by a first connecting line through which a modulated signal is sent from the communication device to the wired communication device, and a second connecting line, which is different from the first connecting line, through which a signal is sent from the wired communication device to the communication device.Type: GrantFiled: March 6, 2006Date of Patent: November 16, 2010Assignee: Sony CorporationInventor: Kunihide Fujii
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Patent number: 7766237Abstract: A mobile radio communication device can automatically initialize the mode of a SAM card (or the SAM function area of an IC card) after executing radio communication with an external radio communication apparatus. The mobile radio communication device transmits/receives data to/from an external radio communication apparatus located in an area that allows radio communication. In the mobile radio communication device, an IC card that receives power supply from a mobile radio communication device main-unit, that manages data transmitted/received to/from the external radio communication apparatus, and that manages a communication mode state of the mobile radio communication device is detachably connected to the mobile radio communication device main-unit.Type: GrantFiled: October 22, 2004Date of Patent: August 3, 2010Assignee: Sony CorporationInventors: Kazuyuki Sakamoto, Kunihide Fujii
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Patent number: 7711323Abstract: A wireless communication apparatus that communicates data with an external wireless apparatus in a wireless communication range includes a controller and a wireless communication interface device is provided. The wireless communication interface device includes a transmitting unit that transmits response request data to the external wireless apparatus, a counter that counts time for determining whether or not a time limit for waiting for the response data has elapsed, a storage unit that stores the response data, a receiving unit that receives first response data from the external wireless apparatus and that instantaneously receives second response data without an instruction from the controller when the time limit has not elapsed, a frame length checking unit that checks a frame length of the received response data, and an error detector that performs error detection on the response data.Type: GrantFiled: November 11, 2004Date of Patent: May 4, 2010Assignee: Sony CorporationInventor: Kunihide Fujii
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Patent number: 7522879Abstract: A portable terminal includes a near-field communication (NFC) device for performing information communication via near-field communication; a write button; and a read button. In order to write information stored in the portable terminal into an information providing apparatus, a user moves the portable terminal close to the information providing apparatus such that a distance between the portable terminal and the information providing apparatus is 10 cm or less while pressing the write button. In order to read information stored in the information providing apparatus into the portable terminal, a user moves the portable terminal close to the information providing apparatus such that a distance between the portable terminal and the information providing apparatus is 10 cm or less while pressing the read button.Type: GrantFiled: June 7, 2007Date of Patent: April 21, 2009Assignee: Sony CorporationInventors: Takashi Matsuo, Kunihide Fujii, Kazuyuki Sakamoto
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Publication number: 20080126560Abstract: The present invention relates to a communication system and communication method which enable various types of near field communication, and a data processing apparatus. NFC communication apparatuses 1 to 3 have two features in that each can perform communication in two communication modes and that each can perform data transmission at a plurality of transfer rates. The two communication modes consist of a passive mode and an active mode. In the passive mode, between the NFC communication apparatuses 1 and 2, for example, the NFC communication apparatus 1 transmits data to the NFC communication apparatus 2 by modulating electromagnetic waves generated by itself, while the NFC communication apparatus 2 transmits data to the NFC communication apparatus 1 by performing load modulation on the electromagnetic waves generated by the NFC communication apparatus 1.Type: ApplicationFiled: December 12, 2007Publication date: May 29, 2008Applicant: Sony CorporationInventors: Yoshihisa TAKAYAMA, Susumu Kusakabe, Kazushige Tsurumi, Tadashi Morita, Kunihide Fujii
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Patent number: 7346061Abstract: The present invention relates to a communication system and communication method which enable various types of near field communication, and a data processing apparatus. NFC communication apparatuses 1 to 3 have two features in that each can perform communication in two communication modes and that each can perform data transmission at a plurality of transfer rates. The two communication modes consist of a passive mode and an active mode. In the passive mode, between the NFC communication apparatuses 1 and 2, for example, the NFC communication apparatus 1 transmits data to the NFC communication apparatus 2 by modulating electromagnetic waves generated by itself, while the NFC communication apparatus 2 transmits data to the NFC communication apparatus 1 by performing load modulation on the electromagnetic waves generated by the NFC communication apparatus 1.Type: GrantFiled: October 28, 2003Date of Patent: March 18, 2008Assignee: Sony CorporationInventors: Yoshihisa Takayama, Susumu Kusakabe, Kazushige Tsurumi, Tadashi Morita, Kunihide Fujii
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Publication number: 20070232232Abstract: A portable terminal includes a near-field communication (NFC) device for performing information communication via near-field communication; a write button; and a read button. In order to write information stored in the portable terminal into an information providing apparatus, a user moves the portable terminal close to the information providing apparatus such that a distance between the portable terminal and the information providing apparatus is 10 cm or less while pressing the write button. In order to read information stored in the information providing apparatus into the portable terminal, a user moves the portable terminal close to the information providing apparatus such that a distance between the portable terminal and the information providing apparatus is 10 cm or less while pressing the read button.Type: ApplicationFiled: June 7, 2007Publication date: October 4, 2007Applicant: SONY CORPORATIONInventors: Takashi Matsuo, Kunihide Fujii, Kazuyuki Sakamoto
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Publication number: 20070171848Abstract: A communication system includes first and second communication devices that carry out wireless communication. The first communication device includes a setter configured to set a first indication mode and a corresponding second indication mode, a sender configured to send data representing the second indication mode to the second communication device when communication has been established with the second communication device, and a first indicator configured to indicate the establishment of communication in the first indication mode, correspondingly to indication in the second indication mode by the second communication device. The second communication device includes a receiver configured to receive the data representing the second indication mode, and a second indicator configured to indicate the establishment of communication in the second indication mode, correspondingly to the indication in the first indication mode by the first communication device.Type: ApplicationFiled: September 11, 2006Publication date: July 26, 2007Applicant: Sony CorporationInventors: Kunihide Fujii, Kazuyuki Sakamoto
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Patent number: 7248834Abstract: A portable terminal includes a near-field communication (NFC) device for performing information communication via near-field communication; a write button; and a read button. In order to write information stored in the portable terminal into an information providing apparatus, a user moves the portable terminal close to the information providing apparatus such that a distance between the portable terminal and the information providing apparatus is 10 cm or less while pressing the write button. In order to read information stored in the information providing apparatus into the portable terminal, a user moves the portable terminal close to the information providing apparatus such that a distance between the portable terminal and the information providing apparatus is 10 cm or less while pressing the read button.Type: GrantFiled: July 12, 2004Date of Patent: July 24, 2007Assignee: Sony CorporationInventors: Takashi Matsuo, Kunihide Fujii, Kazuyuki Sakamoto
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Patent number: 7209706Abstract: A communication apparatus and a communication method prevent responses from being simultaneously received from two or more communicating parties. A first NFC apparatus transmits data for requesting IDs, and acquires IDs sent from second and third NFC apparatuses in reply to the request. After acquiring the IDs of the second and third NFC apparatuses, the first NFC apparatus transmits data that includes their IDs as the data for the second and third NFC apparatuses. If the first NFC apparatus cannot properly acquire the IDs of the second and third NFC apparatuses, then it sends the data for requesting their IDs again. Upon receipt of the request for the IDs, the second and third NFC apparatuses generate their own IDs by using random numbers and send the generated IDs. If the second and third NFC apparatuses receive the request for their IDs again, then they re-generate their own IDs by using random numbers, and send the re-generated IDs again.Type: GrantFiled: November 19, 2003Date of Patent: April 24, 2007Assignee: Sony CorporationInventors: Kunihide Fujii, Tadashi Morita, Shigeru Arisawa, Yoshihisa Takayama