Patents by Inventor Tsutomu Niiho
Tsutomu Niiho 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: 9648273Abstract: A transmitter apparatus is provided with a first multi-value signal generator to convert the non-video signal of natural number “a”×natural number M bits other than a video signal into a multi-value signal of a multi-value number 2aM and to output a resulting signal, a second multi-value signal generator to convert the video signal of natural number “a”×natural number N bits into a multi-value signal of a multi-value number 2aN larger than the multi-value number 2aM and to output a resulting signal, and a transmission driver circuit to transmit the multi-value signal of the multi-value number 2aM in at least partial time interval of a blanking time interval and to transmit the multi-value signal of the multi-value number 2aN in an active time interval.Type: GrantFiled: July 10, 2013Date of Patent: May 9, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yasumichi Takai, Tsutomu Niiho, Osamu Shibata
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Patent number: 9274292Abstract: A signal transmitting connector of the present disclosure includes a connection terminal portion comprising a terminal that executes at least one of outputting of an electric signal to an external device or inputting of the electric signal from an external device, a connector portion comprising a photoelectric converting portion that executes photoelectric conversion between an optical signal and the electric signal, and a cable holding portion that holds an optical fiber transmitting the optical signal, the cable holding portion comprising one or a plurality of cable holding portion mirror(s) each forming an optical path between the optical fiber and the photoelectric converting portion.Type: GrantFiled: December 13, 2013Date of Patent: March 1, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Chie Sasaki, Tsutomu Niiho
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Publication number: 20150208027Abstract: A transmitter apparatus is provided with a first multi-value signal generator to convert the non-video signal of natural number “a”×natural number M bits other than a video signal into a multi-value signal of a multi-value number 2aM and to output a resulting signal, a second multi-value signal generator to convert the video signal of natural number “a”×natural number N bits into a multi-value signal of a multi-value number 2aN larger than the multi-value number 2aM and to output a resulting signal, and a transmission driver circuit to transmit the multi-value signal of the multi-value number 2aM in at least partial time interval of a blanking time interval and to transmit the multi-value signal of the multi-value number 2aN in an active time interval.Type: ApplicationFiled: July 10, 2013Publication date: July 23, 2015Inventors: Yasumichi Takai, Tsutomu Niiho, Osamu Shibata
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Publication number: 20150153521Abstract: A signal transmitting connector of the present disclosure includes a connection terminal portion comprising a terminal that executes at least one of outputting of an electric signal to an external device or inputting of the electric signal from an external device, a connector portion comprising a photoelectric converting portion that executes photoelectric conversion between an optical signal and the electric signal, and a cable holding portion that holds an optical fiber transmitting the optical signal, the cable holding portion comprising one or a plurality of cable holding portion mirror(s) each forming an optical path between the optical fiber and the photoelectric converting portion.Type: ApplicationFiled: December 13, 2013Publication date: June 4, 2015Applicant: Panasonic Intellectual Property Management Co., LtInventors: Chie Sasaki, Tsutomu Niiho
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Patent number: 9048952Abstract: A switch is inserted and connected between a first portion and a second portion of an HPD line. The switch connects the first portion to the second portion when an HPD signal is outputted to the second portion. The switch cuts off the connection between the first portion and the second portion when the HPD signal is not outputted to the second portion. An AND gate generates a connection state detection signal that represents the connection state of an HDMI optical active cable, and outputs the connection state detection signal to a switch.Type: GrantFiled: March 11, 2013Date of Patent: June 2, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tsutomu Niiho, Osamu Shibata, Yoshiyuki Saito
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Patent number: 8768122Abstract: Disclosed is an optical module which improves optical coupling efficiency either when configured to receive an optical signal from an optical fiber with a light receiving element or when configured to receive an optical signal from a light emitting element with an optical fiber. The optical module includes: a substrate (1) having in the surface thereof a first groove (1a) and a second groove (1b) formed, with this second groove (1b) being configured to have a substantially V-shaped cross section formed deeper than the first groove and being formed in continuation from the first groove; and an internal waveguide (16) provided within the first groove (1a) of the substrate (1).Type: GrantFiled: February 23, 2011Date of Patent: July 1, 2014Assignee: Panasonic CorporationInventors: Tadahiro Yamaji, Nobuyuki Asashi, Hiroyuki Yagyu, Yutaka Kinugasa, Takuya Matsumoto, Tsutomu Niiho
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Publication number: 20120321250Abstract: Disclosed is an optical module which improves optical coupling efficiency either when configured to receive an optical signal from an optical fiber with a light receiving element or when configured to receive an optical signal from a light emitting element with an optical fiber. The optical module includes: a substrate (1) having in the surface thereof a first groove (1a) and a second groove (1b) formed, with this second groove (1b) being configured to have a substantially V-shaped cross section formed deeper than the first groove and being formed in continuation from the first groove; and an internal waveguide (16) provided within the first groove (1a) of the substrate (1).Type: ApplicationFiled: February 23, 2011Publication date: December 20, 2012Applicant: PANASONIC CORPORATIONInventors: Tadahiro Yamaji, Nobuyuki Asashi, Hiroyuki Yagyu, Yutaka Kinugasa, Takuya Matsumoto, Tsutomu Niiho
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Patent number: 8311414Abstract: A transmission device includes a first light emission unit having a light source for emitting one optical signal. A reception unit includes an X-Y address system image sensor, having a pixel region including a plurality of pixels, for receiving the optical signal by the pixel region; a classification unit for creating classification information representing a pixel group including pixels, among the plurality of pixels, which are irradiated with the optical signal; and a control unit for controlling the X-Y address system image sensor in accordance with the classification information to simultaneously read signals of the pixels belonging to the pixel group.Type: GrantFiled: August 10, 2007Date of Patent: November 13, 2012Assignee: Panasonic CorporationInventors: Tsutomu Niiho, Hiroyuki Sasai, Mariko Nakaso
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Patent number: 7660027Abstract: An optical modulator comprises an electrode 21 which applies to an optical waveguides 12 of a Mach-Zehnder type optical interference system a first electric signal based on an alternating current signal S1 and a direct current bias V1, an electrode 22 which applies to an optical waveguide 13 of the Mach-Zehnder type optical interference system a second electric signal based on an alternating current signal S2 and a direct current bias V2, and a bias setting section 41 which sets average direct current levels of the first and second electric signals based on signal frequency information D1 which indicates a magnitude relation between a maximum frequency of the alternating current signal S1 and a maximum frequency of the alternating current signal S2.Type: GrantFiled: November 6, 2007Date of Patent: February 9, 2010Assignee: Panasonic CorporationInventors: Tsutomu Niiho, Kouichi Masuda, Masaru Fuse, Fumio Fujisaki, Kuniharu Itakura, Tomoaki Ohira
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Patent number: 7650112Abstract: A SW (70) receives an Ethernet® signal from an outside of areas E and F. The SW (70) selects and outputs the obtained Ethernet® signal to any one of APs (91a to 91e) in accordance with a network structure managed by the SW (70). The AP (91a to 91e) converts the Ethernet® signal to an electrical signal type wireless LAN signal, which is in turn output to a main station (10). The main station (10) frequency-multiplexes the signal output from each of the APs (91a to 91e), and converts the signal to an optical signal, which is in turn output to sub-stations (20a and 20b). The sub-station (20a and 20b) transmits the signal transmitted from the main station (10) to a terminal in the form of a wireless radio wave. Thereby, when a plurality of communication areas are present, the accommodation capacity of an AP can be effectively utilized in each communication area.Type: GrantFiled: October 17, 2003Date of Patent: January 19, 2010Assignee: Panasonic CorporationInventors: Kuniaki Utsumi, Hiroaki Yamamoto, Kouichi Masuda, Tsutomu Niiho, Mariko Nakaso, Hiroyuki Sasai
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Publication number: 20090317088Abstract: A transmission device includes a first light emission unit having a light source for emitting one optical signal. A reception unit includes an X-Y address system image sensor, having a pixel region including a plurality of pixels, for receiving the optical signal by the pixel region; a classification unit for creating classification information representing a pixel group including pixels, among the plurality of pixels, which are irradiated with the optical signal; and a control unit for controlling the X-Y address system image sensor in accordance with the classification information to simultaneously read signals of the pixels belonging to the pixel group.Type: ApplicationFiled: August 10, 2007Publication date: December 24, 2009Inventors: Tsutomu Niiho, Hiroyuki Sasai, Mariko Nakaso
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Patent number: 7630643Abstract: Provided is a multimode optical transmission system capable of reducing an influence of multimode dispersion occurring when an optical signal is transmitted in multimode. Light sources (101 to 10m) respectively convert inputted electrical signals into a plurality of optical signals respectively having different wavelengths, and respectively output the plurality of optical signals. A wavelength multiplexing section (200) performs wavelength multiplexing of the plurality of optical signals outputted from the light sources (101 to 10m), and outputs a resultant signal as a wavelength multiplexed signal. A multimode optical transmission path (300) optically transmits the wavelength multiplexed signal in multimode. A mode processing section (400) extracts, from the wavelength multiplexed signal transmitted through the multimode optical transmission path (300), a plurality of optical signals each being in a mode having a particular wavelength and a particular propagation constant.Type: GrantFiled: July 25, 2005Date of Patent: December 8, 2009Assignee: Panasonic CorporationInventors: Tsutomu Niiho, Kouichi Masuda
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Publication number: 20090097856Abstract: There included are a plurality of light receiving sections (121, 122) for receiving a plurality of optical signals (R1, R2) and respectively converting the received optical signals to a plurality of electrical signals (r1, r2); a first calculating section (130) for subjecting the plurality of electrical signals (r1, r2) to a process of canceling interference components occurring due to propagation of the plurality of optical signals through space; and a second calculating section (140) for calculating, with respect to each of the plurality of electrical signals whose interference components have been canceled by the first calculating section, whether or not a distortion occurring due to optical beat interference has a value less than or equal to a predetermined permissible value.Type: ApplicationFiled: April 3, 2007Publication date: April 16, 2009Inventors: Hiroyuki Sasai, Tsutomu Niiho, Mariko Nakaso
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Publication number: 20090016724Abstract: Provided is a multimode optical transmission system capable of reducing an influence of multimode dispersion occurring when an optical signal is transmitted in multimode. Light sources (101 to 10m) respectively convert inputted electrical signals into a plurality of optical signals respectively having different wavelengths, and respectively output the plurality of optical signals. A wavelength multiplexing section (200) performs wavelength multiplexing of the plurality of optical signals outputted from the light sources (101 to 10m), and outputs a resultant signal as a wavelength multiplexed signal. A multimode optical transmission path (300) optically transmits the wavelength multiplexed signal in multimode. A mode processing section (400) extracts, from the wavelength multiplexed signal transmitted through the multimode optical transmission path (300), a plurality of optical signals each being in a mode having a particular wavelength and a particular propagation constant.Type: ApplicationFiled: July 25, 2005Publication date: January 15, 2009Inventors: Tsutomu Niiho, Kouichi Masuda
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Publication number: 20090009259Abstract: An angle modulator having an excellent noise characteristic and an excellent distortion characteristic independent of an unwanted wave component of an optical modulation signal is provided. The angle modulator (10) includes an optical SSB modulation section (103a), an optical SSB-SC modulation section (104a), and an optical angle modulation section (105). By performing intensity modulation on an output signal of the optical SSB modulation section (103a) at the optical SSB-SC modulation section (104a), an unwanted angle modulated signal is prevented from overlapping with an angle modulated signal outputted from an optical detection section (107). Further, by a filter (108) filtering only an angle modulated signal component which does not include the unwanted wave component among the angle modulated signal components outputted from the optical detection section (107), a distortion characteristic after angle demodulation can be prevented from deteriorating.Type: ApplicationFiled: January 12, 2007Publication date: January 8, 2009Inventors: Tomoaki Ohira, Kouichi Masuda, Masaru Fuse, Tsutomu Niiho
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Patent number: 7460829Abstract: A wireless communication system capable of keeping a level of a wireless signal received by a relay apparatus within a predetermined dynamic range. In a control apparatus, a transmitting section converts a downstream electric signal into a downstream optical signal and transmits the downstream optical signal to the relay apparatus via an optical transmission path. The relay apparatus converts the received downstream optical signal into a downstream electric signal and transmits the downstream electric signal as a wireless signal to a wireless communication terminal from a transmitting/receiving antenna section. In the relay apparatus, a level adjustment section adjusts the level of the wireless signal transmitted by the relay apparatus such that the receiving level of the wireless signal received by the relay apparatus is kept within a predetermined range.Type: GrantFiled: July 22, 2004Date of Patent: December 2, 2008Assignee: Panasonic CorporationInventors: Kuniaki Utsumi, Hiroaki Yamamoto, Kouichi Masuda, Tsutomu Niiho, Mariko Nakaso, Kazuo Tanaka, Hiroyuki Sasai
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Patent number: 7440432Abstract: A wireless access system is provided which prevents the occurrence of a hidden terminal problem and minimizes the reduction in throughput. In the wireless access system, an access point divides terminals into groups such that terminals in one group cannot recognize radio waves sent from terminals in another group, and performs communication with the terminals on a per-group basis. By this, the wireless access system avoids the occurrence of the hidden terminal problem. RTS/CTS packets used to avoid the occurrence of the hidden terminal problem are exchanged between the access point and the terminals on a per-group basis, whereby overhead is reduced and the reduction in throughput is minimized.Type: GrantFiled: December 3, 2004Date of Patent: October 21, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tsutomu Niiho, Kouichi Masuda
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Patent number: 7439485Abstract: A multimode optical transmission system reduces a deterioration of a noise characteristic and a distortion characteristic caused by an interference between modes. In an optical transmitter, a signal output section outputs a predetermined signal based on an inputted electrical signal. A control section controls the signal output section so as to adjust a frequency component of the signal outputted by the signal output section based on group delay information of modes which propagate in a multimode optical transmission line. An electric-optic conversion section converts, into an optical signal, the signal outputted by the signal output section, and transmits the optical signal via the multimode optical transmission line.Type: GrantFiled: June 26, 2006Date of Patent: October 21, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tsutomu Niiho, Kouichi Masuda
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Publication number: 20080106780Abstract: An optical modulator comprises an electrode 21 which applies to an optical waveguides 12 of a Mach-Zehnder type optical interference system a first electric signal based on an alternating current signal S1 and a direct current bias V1, an electrode 22 which applies to an optical waveguide 13 of the Mach-Zehnder type optical interference system a second electric signal based on an alternating current signal S2 and a direct current bias V2, and a bias setting section 41 which sets average direct current levels of the first and second electric signals based on signal frequency information D1 which indicates a magnitude relation between a maximum frequency of the alternating current signal S1 and a maximum frequency of the alternating current signal S2.Type: ApplicationFiled: November 6, 2007Publication date: May 8, 2008Inventors: Tsutomu Niiho, Kouichi Masuda, Masaru Fuse, Fumio Fujisaki, Kuniharu Itakura, Tomoaki Ohira
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Patent number: 7212747Abstract: A light emitting section outputs an optical signal having an intensity corresponding to a transmission timing signal, the optical signal modulated based on a radio transmission signal. A received photocurrent detection section detects an intensity of an optical signal received by a light receiving section. In accordance with the detected intensity, a high frequency amplification section amplifies the output signal of the light receiving section, and a transmission timing signal reconstruction section reconstructs the transmission timing signal.Type: GrantFiled: June 9, 2003Date of Patent: May 1, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Tsutomu Niiho, Hiroyuki Sasai, Kouichi Masuda, Kenji Miyanaga