Patents by Inventor Koji Imamura
Koji Imamura 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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Publication number: 20150140715Abstract: An ink for forming a functional layer, which is used when any thin film layer among functional layers consisting of a plurality of thin film layers is formed, includes a functional layer forming material and a solvent for dissolving the functional layer forming material, and in which the number of particles of 0.5 ?m or more is 7 or less in 10 ml of the ink for forming a functional layer.Type: ApplicationFiled: November 12, 2014Publication date: May 21, 2015Inventors: Koji IMAMURA, Masahiro UCHIDA, Takuya SONOYAMA
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Publication number: 20140197780Abstract: A charging apparatus for a secondary battery comprises: a power supply circuit connected to a primary winding 11a of a transformer T1; a main winding 11b and a sub winding 11c connected to a secondary side of the transformer T1; a charging circuit 110 connected to the main winding 11b, the charging circuit 110 supplying power to a battery pack 130 to be charged; and a control circuit 120 connected to the sub winding 11c, the control circuit 120 controlling the charging circuit 110, wherein the charging circuit 110 comprises a LED 140 indicating a standby state or a charge completion state, the LED 140 being lighted at light-load time of the charging circuit 110 based on a command of the control circuit 120.Type: ApplicationFiled: January 6, 2014Publication date: July 17, 2014Applicants: MAKITA CORPORATION, TAMURA CORPORATIONInventors: Koji IMAMURA, Takeshi YAMAMOTO, Yasuhiro TABUCHI, Makihiro KOBAYASHI
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Patent number: 8693592Abstract: An AGC unit starts a gain control of the variable gain amplifying unit when a bit saturation occurs in the digital baseband signal output from the A/D converting unit, and starts a gain control of the variable gain amplifying unit when a detection of STS from the digital baseband signal output from the A/D converting unit is started. The AGC unit performs the gain control of the variable gain amplifying unit once when the detection of STS is started, and performs the gain control of the variable gain amplifying unit twice when the bit saturation occurs, namely a larger number of times than when the detection of STS is started.Type: GrantFiled: March 10, 2008Date of Patent: April 8, 2014Assignee: Panasonic CorporationInventors: Koji Imamura, Naganori Shirakata, Shuya Hosokawa, Kenji Miyanaga
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Publication number: 20140087395Abstract: The object was to provide a method for distinguishing between species within the genus Staphylococcus; binding affinities between many types of lectins and bacteria belonging to the genus Staphylococcus were examined; and lectins of Tachylectin-2, LEL, KAA1, BCL11, CBA, HAA, HPA, STL, proBCA1, proBCA2, ULL, DSA, PWM, UDA, WFL, hypninA3, BCL11d, CFA1, CFA2, CLA, MPA1, MPA2, AC-avranin, algCSA, BML11b, BML11c, etc. were selected. Further, it was found that these lectins could be used to distinguish between species within the genus Staphylococcus.Type: ApplicationFiled: March 22, 2012Publication date: March 27, 2014Applicants: HIROSHIMA UNIVERSITY, GLYENCE CO., LTD.Inventors: Hideaki Takeuchi, Koji Imamura, Uichiro Yabe, Kanji Hori, Makoto Hirayama
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Patent number: 8467726Abstract: The communication device (10) which performs, when attached to the first region of the moving body, wireless communication with the communication partner device (20) attached to the second region of the moving body includes: a motion obtaining unit (11) which obtains motion information indicating a motion of at least one region of the moving body; a parameter determining unit (12) which determines a parameter corresponding to the motion of the region of the moving body indicated by the motion information obtained by the motion obtaining unit (11), using parameter information in which the motion and a parameter indicating a communication mode for successful wireless communication are associated with each other; and a wireless communication unit (13) which performs wireless communication with the communication partner device (20) according to the parameter determined by the parameter determining unit (12).Type: GrantFiled: August 25, 2010Date of Patent: June 18, 2013Assignee: Panasonic CorporationInventors: Naganori Shirakata, Koji Imamura, Yoshitaka Ohta
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Patent number: 8295218Abstract: Provided is a compact and low power consumption wireless communication system, including a base station and communication terminals, in which power consumption of the communication terminal is reduced. The base station alternately sets an active interval during which predetermined data communication is performed, and an inactive interval during which the predetermined data communication is not performed. During the active interval, a beacon including information indicating a start timing of a subsequent active interval is transmitted and received. During the inactive interval, a sub-beacon including information providing notice of a transmission timing of a subsequent beacon is transmitted and received. When receiving the sub-beacon, the communication terminal obtains the transmission timing of the subsequent beacon and stops a supply of power to an unit related to a wireless communication function until the transmission timing.Type: GrantFiled: June 29, 2009Date of Patent: October 23, 2012Assignee: Panasonic CorporationInventors: Koji Imamura, Hiroshi Hayashino, Naganori Shirakata
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Patent number: 8274926Abstract: In a wireless communication system according to the present invention: a control device and a communication terminal communicate in an active period. The control device: generates a first beacon packet including one or more candidate channels; transmits the first beacon packet at the beginning of the active period; determines whether or not a use channel is to be changed based on a communication state, and generates a second beacon packet including information of a determination result; transmits the second beacon packet at the end of the active period; and, when it is determined that the use channel is to be changed, changes the use channel after the active period ends and before a next active period starts. The communication terminal: receives the first and second beacon packets; and, based on the second beacon packet, changes the use channel after the active period ends and before a next active period starts.Type: GrantFiled: July 8, 2009Date of Patent: September 25, 2012Assignee: Panasonic CorporationInventors: Naganori Shirakata, Hironori Nakae, Koji Imamura
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Patent number: 8233865Abstract: The noise amount information storage unit 161 stores noise amount information which indicates relationships between gain value of the variable gain amplification units 121 and 125 and the amount of noise included in BB signals output from the down converters 131 and 135. The AGC unit 140 controls the gain value of the variable gain amplification units 121 and 125 so that the power of BB signals output from the down converters 131 and 135 becomes constant. The noise amount estimation unit 162 estimates noise amount of noise corresponding to the controlled gain value of the variable gain amplification units 121 and 125 by referring to the noise amount information stored in the noise amount information storage unit 161. The weight generation unit 170 generates weight matrix based on results of estimations performed by the channel characteristic estimation unit 150 and the noise estimation unit 162.Type: GrantFiled: January 9, 2008Date of Patent: July 31, 2012Assignee: Panasonic CorporationInventors: Shuya Hosokawa, Kenji Miyanaga, Naganori Shirakata, Koji Imamura, Koichiro Tanaka
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Patent number: 8179782Abstract: An FFT unit (170) separates a received symbol by Fourier conversion into a plurality of subcarriers, and a phase difference detection unit (193) detects a phase difference between 4 pilot carriers and data carriers adjacent to the pilot carriers (adjacent carriers) The decision unit (194) decides whether the phase differences between the pilot carriers and the adjacent carriers detected by the phase difference detection unit (193) fulfill a phase difference condition. Then, the decision unit (194) decides that the received symbol is an HTSIG if the number of phase differences that fulfill the phase difference condition is greater than or equal to a predetermined number, and decides that the received symbol is either a SIG or a DATA if the number of phase differences that fulfill the phase difference condition is less than the predetermined number.Type: GrantFiled: February 1, 2008Date of Patent: May 15, 2012Assignee: Panasonic CorporationInventors: Naganori Shirakata, Shuya Hosokawa, Kenji Miyanaga, Koji Imamura
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Publication number: 20110294429Abstract: The communication device (10) which performs, when attached to the first region of the moving body, wireless communication with the communication partner device (20) attached to the second region of the moving body includes: a motion obtaining unit (11) which obtains motion information indicating a motion of at least one region of the moving body; a parameter determining unit (12) which determines a parameter corresponding to the motion of the region of the moving body indicated by the motion information obtained by the motion obtaining unit (11), using parameter information in which the motion and a parameter indicating a communication mode for successful wireless communication are associated with each other; and a wireless communication unit (13) which performs wireless communication with the communication partner device (20) according to the parameter determined by the parameter determining unit (12).Type: ApplicationFiled: August 25, 2010Publication date: December 1, 2011Applicant: Panasonic CorporationInventors: Naganori Shirakata, Koji Imamura, Yoshitaka Ohta
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Patent number: 8064370Abstract: At a time T131, a wireless communication apparatus 11A determines to transmit a data packet, and then performs interference signal detection for a period TA. At a time T132, which precedes a time T133 at which the period TA has elapsed since the time T131, the wireless communication apparatus 11A detects a data packet d21 (an interference signal). At a time T134, at which a period TB has elapsed since the time T132 at which the interference signal has been detected, the wireless communication apparatus 11A starts transmitting a data packet d11 to a wireless communication apparatus 12A. At a time T136, the wireless communication apparatus 11A completes the transmission of the data packet d11.Type: GrantFiled: March 1, 2007Date of Patent: November 22, 2011Assignee: Panasonic CorporationInventors: Naganori Shirakata, Shuya Hosokawa, Koji Imamura, Koichiro Tanaka, Kenji Miyanaga, Yoshio Urabe, Tsutomu Mukai
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Publication number: 20110261764Abstract: In a wireless communication system according to the present invention: a control device and a communication terminal communicate in an active period. The control device: generates a first beacon packet including one or more candidate channels; transmits the first beacon packet at the beginning of the active period; determines whether or not a use channel is to be changed based on a communication state, and generates a second beacon packet including information of a determination result; transmits the second beacon packet at the end of the active period; and, when it is determined that the use channel is to be changed, changes the use channel after the active period ends and before a next active period starts. The communication terminal: receives the first and second beacon packets; and, based on the second beacon packet, changes the use channel after the active period ends and before a next active period starts.Type: ApplicationFiled: July 8, 2009Publication date: October 27, 2011Applicant: PANASONIC CORPORATIONInventors: Naganori Shirakata, Hironori Nakae, Koji Imamura
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Patent number: 8023599Abstract: Interfering signals coming at random timings from different radio stations are identified. In order to attain this, a method for storing the characterizing quantity of an interfering signal included in a received signal includes calculating the characterizing quantity of the received signal, determining a probability that a desired signal is included in the received signal, determining that the received signal is an interfering signal when determining that there is no probability that the desired signal is included in the received signal, and storing the characterizing quantity of the received signal as an interfering signal characterizing quantity when it is determined at the received signal determination step that there is no probability that the desired signal is included in the received signal.Type: GrantFiled: October 23, 2006Date of Patent: September 20, 2011Assignee: Panasonic CorporationInventors: Koichiro Tanaka, Naganori Shirakata, Yoshio Urabe, Tsutomu Mukai, Kenji Miyanaga, Koji Imamura, Shuya Hosokawa
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Patent number: 7983311Abstract: A correlation unit (32) sequentially obtains correlation values between a baseband signal and a reference signal and outputs the obtained reference signal to a section division unit (33). The output of the correlation unit (32) is divided into symbol time periods by the section division unit (33). A section position detection unit (34) detects a largest correlation value in each of sections resulting from the division by the correlation unit (32) and outputs, to a synchronization judgment unit (35), first position information that indicates a relative position of each detected largest correlation value. The synchronization judgment unit (35) detects an arrival of a packet signal and estimates a symbol timing based on the first position information of the sections.Type: GrantFiled: April 23, 2007Date of Patent: July 19, 2011Assignee: Panasonic CorporationInventors: Shuya Hosokawa, Naganori Shirakata, Koichiro Tanaka, Kenji Miyanaga, Koji Imamura
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Publication number: 20100260084Abstract: Provided is a compact and low power consumption wireless communication system, including a base station and communication terminals, in which power consumption of the communication terminal is reduced. The base station alternately sets an active interval during which predetermined data communication is performed, and an inactive interval during which the predetermined data communication is not performed. During the active interval, a beacon including information indicating a start timing of a subsequent active interval is transmitted and received. During the inactive interval, a sub-beacon including information providing notice of a transmission timing of a subsequent beacon is transmitted and received. When receiving the sub-beacon, the communication terminal obtains the transmission timing of the subsequent beacon and stops a supply of power to an unit related to a wireless communication function until the transmission timing.Type: ApplicationFiled: June 29, 2009Publication date: October 14, 2010Inventors: Koji Imamura, Hiroshi Hayashino, Naganori Shirakata
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Publication number: 20100197262Abstract: The noise amount information storage unit 161 stores noise amount information which indicates relationships between gain value of the variable gain amplification units 121 and 125 and the amount of noise included in BB signals output from the down converters 131 and 135. The AGC unit 140 controls the gain value of the variable gain amplification units 121 and 125 so that the power of BB signals output from the down converters 131 and 135 becomes constant. The noise amount estimation unit 162 estimates noise amount of noise corresponding to the controlled gain value of the variable gain amplification units 121 and 125 by referring to the noise amount information stored in the noise amount information storage unit 161. The weight generation unit 170 generates weight matrix based on results of estimations performed by the channel characteristic estimation unit 150 and the noise estimation unit 162.Type: ApplicationFiled: January 9, 2008Publication date: August 5, 2010Inventors: Shuya Hosokawa, Kenji Miyanaga, Naganori Shirakata, Koji Imamura, Koichiro Tanaka
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Publication number: 20100128826Abstract: An AGC unit 111 starts a gain control of the variable gain amplifying unit 102 when a bit saturation occurs in the digital baseband signal output from the A/D converting unit 104, and starts a gain control of the variable gain amplifying unit 102 when a detection of STS from the digital baseband signal output from the A/D converting unit 104 is started. The AGC unit 111 performs the gain control of the variable gain amplifying unit 102 once when the detection of STS is started, and performs the gain control of the variable gain amplifying unit 102 twice when the bit saturation occurs, namely a larger number of times than when the detection of STS is started.Type: ApplicationFiled: March 10, 2008Publication date: May 27, 2010Inventors: Koji Imamura, Naganori Shirakata, Shuya Hosokawa, Kenji Miyanaga
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Publication number: 20100008346Abstract: An FFT unit (170) separates a received symbol by Fourier conversion into a plurality of subcarriers, and a phase difference detection unit (193) detects a phase difference between 4 pilot carriers and data carriers adjacent to the pilot carriers (adjacent carriers) The decision unit (194) decides whether the phase differences between the pilot carriers and the adjacent carriers detected by the phase difference detection unit (193) fulfill a phase difference condition. Then, the decision unit (194) decides that the received symbol is an HTSIG if the number of phase differences that fulfill the phase difference condition is greater than or equal to a predetermined number, and decides that the received symbol is either a SIG or a DATA if the number of phase differences that fulfill the phase difference condition is less than the predetermined number.Type: ApplicationFiled: February 1, 2008Publication date: January 14, 2010Inventors: Naganori Shirakata, Shuya Hosokawa, Kenji Miyanaga, Koji Imamura
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Publication number: 20090175299Abstract: A correlation unit (32) sequentially obtains correlation values between a baseband signal and a reference signal and outputs the obtained reference signal to a section division unit (33). The output of the correlation unit (32) is divided into symbol time periods by the section division unit (33). A section position detection unit (34) detects a largest correlation value in each of sections resulting from the division by the correlation unit (32) and outputs, to a synchronization judgment unit (35), first position information that indicates a relative position of each detected largest correlation value. The synchronization judgment unit (35) detects an arrival of a packet signal and estimates a symbol timing based on the first position information of the sections.Type: ApplicationFiled: April 23, 2007Publication date: July 9, 2009Inventors: Shuya Hosokawa, Naganori Shirakata, Koichiro Tanaka, Kenji Miyanaga, Koji Imamura
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Publication number: 20090135972Abstract: An object is to identify interfering signals coming at random timings from different radio stations. In order to attain this object, a method for storing the characterizing quantity of an interfering signal included in a received signal comprises a characterizing quantity calculation step of calculating the characterizing quantity of the received signal; a received signal determination step of determining a probability that a desired signal is included in the received signal, and determining that the received signal is an interfering signal when determining that there is no probability that the desired signal is included in the received signal; and an interfering signal characterizing quantity storage step of storing the characterizing quantity of the received signal as an interfering signal characterizing quantity when it is determined at the received signal determination step that there is no probability that the desired signal is included in the received signal.Type: ApplicationFiled: October 23, 2006Publication date: May 28, 2009Inventors: Koichiro Tanaka, Naganori Shirakata, Yoshio Urabe, Tsutomu Mukai, Kenji Miyanaga, Koji Imamura, Shuya Hosokawa