Patents by Inventor Shiro Nakagawa
Shiro Nakagawa 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: 11947723Abstract: Provided is a decoding device including a decoding unit configured to decode a plurality of pieces of encoded data on the basis of encoding method information that has been received, received bitstream data including the plurality of pieces of encoded data in which a plurality of segments of a tactile signal has been respectively encoded, in which the encoding method information includes information indicating in which encoding method of a plurality of encoding methods the respective segments of the tactile signal have been encoded, the plurality of encoding methods includes a simple tactile encoding method corresponding to a simple tactile signal related to a beginning segment of the tactile signal, the plurality of pieces of encoded data includes simple tactile encoded data in which the simple tactile signal has been encoded in the simple tactile encoding method, and the decoding unit decodes the simple tactile encoded data, in a case where the encoding method information indicates the simple tactile encodiType: GrantFiled: January 24, 2020Date of Patent: April 2, 2024Assignee: Sony Group CorporationInventors: Hirofumi Takeda, Shuichiro Nishigori, Takuma Domae, Toshiyuki Nakagawa, Shiro Suzuki, Takahiro Watanabe
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Publication number: 20090238487Abstract: An image processing apparatus according to the present invention includes an image acquisition section acquiring a multiple overlapping image in which a subject image is multiplexed, a filtering section filtering the multiple overlapping image acquired by the image acquisition section, a similarity calculation section calculating similarity between overlapping images contained in the multiple overlapping image filtered by the filtering section, and an overlapping image displacement calculation section using the similarity obtained by the similarity calculation section to calculate overlapping image displacement in the multiple overlapping image.Type: ApplicationFiled: March 11, 2009Publication date: September 24, 2009Applicants: Olympus Corporation, National University CorporationInventors: Shiro Nakagawa, Masatoshi Okutomi
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Patent number: 6411078Abstract: It is an object of the invention to provide a current sensor apparatus that reduces measurement errors resulting from variations in a position of a current path passing through the space inside a magnetic yoke. The current sensor apparatus comprises a ring-shaped magnetic yoke (2) surrounding a current path (1), part of the yoke having a gap (3), and a magnetic sensor element (4) placed in the gap (3) of the magnetic yoke (2). The magnetic sensor element (4) detects a magnetic field in the gap (3) generated by a current flowing through the current path (1) to measure the current flowing through the current path (1). The current sensor apparatus further comprises a magnetic field interrupter (5), placed between the current path (1) and the gap (3), for interrupting a magnetic field corresponding to a magnetic flux generated by the current passing through the current path (1) and not passing through the magnetic yoke (2), so that the magnetic field would not reach the magnetic sensor element (4).Type: GrantFiled: January 20, 2000Date of Patent: June 25, 2002Assignee: TDK CorporationInventors: Shiro Nakagawa, Kazuyuki Itoh, Katsuaki Tanaka, Katsumi Yabusaki
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Patent number: 6323634Abstract: A magnetic sensor apparatus comprises a magnetic detector (101) that outputs a signal responsive to a magnetic field and a magnetic substance (110) having a cavity (111) in which the magnetic detector (101) is placed. The magnetic detector (101) is placed in the cavity (111) of the magnetic substance (110). The ratio between a magnetic field (H) to be measured and a magnetic field applied to the magnetic detector (101) is set to a specific value, based on at least one of a first demagnetizing factor depending on the shape of the magnetic substance (110) and a second demagnetizing factor depending on the shape of the cavity (111). The magnetic sensor apparatus further comprises a feedback coil (112) that applies a negative feedback magnetic field to the magnetic detector (101) and a reference magnetic field coil (113) that applies a reference alternating magnetic filed to the magnetic detector (101) for controlling the property of the magnetic detector (101).Type: GrantFiled: January 18, 2000Date of Patent: November 27, 2001Assignee: TDK CorporationInventors: Shiro Nakagawa, Katsuaki Tanaka, Katsumi Yabusaki, Yoshihisa Okita
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Patent number: 6316931Abstract: It is an object of the invention to provide a magnetic sensor and a current sensor that exhibit high performance at low costs. A magnetic sensor has a magnetic core (1) having a magnetic saturation property and a sensor coil (2) wound around the magnetic core (1). An end of a detection coil (20) is connected to an end of the sensor coil (2). The other end of the detection coil (20) is grounded. The magnetic sensor further comprises a drive circuit (3) and a detection circuit (4). The drive circuit (3) has a series resonance circuit part of which is made up of the sensor coil (2). To the sensor coil (2) the drive circuit (3) supplies a resonance current flowing into the series resonance circuit as an alternating current that allows the magnetic core (1) to reach a saturation region. The detection circuit (4) detects a magnetic field to be measured by detecting variations in resonance current flowing through the sensor coil (2).Type: GrantFiled: January 18, 2000Date of Patent: November 13, 2001Assignee: TDK CorporationInventors: Shiro Nakagawa, Kazuyuki Itoh, Yoshihisa Okita, Katsumi Yabusaki
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Patent number: 6316939Abstract: It is an object of the invention to provide a magnetic sensor apparatus and a current sensor apparatus each of which incorporates a fluxgate element for reducing an offset voltage and reducing variations in offset voltage. A drive section for exciting a sensor coil (2) includes a self-excited oscillation circuit having a resonant circuit part of which is made up of the sensor coil (2). The self-excited oscillation circuit includes an npn transistor (21) and a pnp transistor (31) that are amplifier elements used for continuing oscillation. The npn transistor (21) operates when an oscillation wave is on the positive side. The pnp transistor (31) operates when an oscillation wave is on the negative side. In the self-excited oscillation circuit, clamping of oscillation waves similarly occurs on both positive and negative sides. Therefore, the oscillation waveform has symmetrical positive and negative portions or has minor asymmetry if any.Type: GrantFiled: August 28, 2000Date of Patent: November 13, 2001Assignee: TDK CorporationInventors: Shiro Nakagawa, Katsumi Yabusaki
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Patent number: 6194121Abstract: An optical recording medium has deposited on a substrate a recording layer incorporating therein a cyanine dye, preferably an indoline dye, and optionally incorporating therein an autoxidizable compound or a thermoplastic resin and/or a singlet oxygen quencher.Type: GrantFiled: January 21, 1998Date of Patent: February 27, 2001Assignee: TDK Corp.Inventors: Kenryo Namba, Akihiko Kuroiwa, Shiro Nakagawa
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Patent number: 5741623Abstract: An optical recording medium has deposited on a substrate a recording layer incorporating therein a cyanine dye, preferably an indoline dye, and optionally incorporating therein an autoxidizable compound or a thermoplastic resin and/or a singlet oxygen quencher.Type: GrantFiled: December 9, 1992Date of Patent: April 21, 1998Assignee: TDK CorporationInventors: Kenryo Namba, Akihiko Kuroiwa, Shiro Nakagawa
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Patent number: 5670295Abstract: An optical recording medium has deposited on a substrate a recording layer incorporating therein a cyanine dye, preferably an indoline dye, and optionally incorporating therein an autoxidizable compound or a thermoplastic resin andr a singlet oxygen quencher.Type: GrantFiled: December 9, 1992Date of Patent: September 23, 1997Inventors: Kenryo Namba, Akihiko Kuroiwa, Shiro Nakagawa
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Patent number: 5652382Abstract: An oscillator circuit includes a gate G.sub.11 of C-MOS type (Q.sub.1, Q.sub.2, and the like) having the function of increasing an operating current i with increasing operating frequency. A humidity sensor HS changing electric impedance thereof in accordance with humidity is arranged in part of the oscillator circuit. The oscillator circuit converts a change in humidity into a change in frequency, causes the gate G.sub.11 to convert the change in frequency into a change in operating current i, and outputs the converted change in operating current i. Further, in order to increase the change in operating current i due to the change in frequency, a series circuit consisting of a capacitor C.sub.13 and a resistor R.sub.17 is connected to the gate G.sub.11 as a capacitive load.Type: GrantFiled: June 7, 1995Date of Patent: July 29, 1997Assignee: TDK CorporationInventors: Shiro Nakagawa, Atsuko Tsuchida, Eiji Takahashi, Kenji Aizawa
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Patent number: 5531097Abstract: An absolute humidity meter in which a humidity sensor changes an electrical impedance thereof-exponentially with respect to the relative humidity. A z-f converting circuit (impedance to frequency ) generates a pulse signal corresponding to the impedance. A time constant control differentiating circuit has an impedance of a voltage control variable impedance element changed exponentially by a control voltage, and outputs a differentiated signal obtained by differentiating the pulse signal. A waveform shaping circuit outputs a pulse signal train obtained by binary-valued the differentiated signal.Type: GrantFiled: February 9, 1995Date of Patent: July 2, 1996Assignee: TDK CorporationInventors: Atsuko Tsuchida, Shiro Nakagawa
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Patent number: 5515723Abstract: A humidity sensor 1 has an impedance Zs thereof changed exponentially with respect to a relative humidity. A z-f conversion circuit 2 generates a pulse signal S1 corresponding to the impedance Zs. A time constant controlled differentiating circuit 3 has an impedance Zt of a voltage control variable impedance element 32 changed exponentially by a control voltage Vc, and outputs a differentiated signal S2 obtained by differentiating the pulse signal S1. A waveform shaping circuit 4 outputs a pulse signal train S3 obtained by binary-coding the differentiated signal S2. An integrating circuit 5 causes a first integrating circuit 51 to obtain the control voltage Vc by integrating the pulse signal train S3 and causes a second integrating circuit 52 to obtain a humidity signal S4 by integrating the pulse signal train S3. A bias circuit 6 applies a bias voltage to a control terminal 323 of the voltage control variable impedance element 32.Type: GrantFiled: February 3, 1995Date of Patent: May 14, 1996Assignee: TDK CorporationInventors: Atsuko Tsuchida, Shiro Nakagawa
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Patent number: 5512416Abstract: An optical recording medium has deposited on a substrate a recording layer incorporating therein a cyanine dye, preferably an indoline dye, and optionally incorporating therein an autoxidizable compound or a thermoplastic resin and/or a singlet oxygen quencher.Type: GrantFiled: June 6, 1995Date of Patent: April 30, 1996Assignee: TDK CorporationInventors: Kenryo Namba, Akihiko Kuroiwa, Shiro Nakagawa
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Patent number: 5396796Abstract: A humidity meter has a housing (1) which has a separated sensor room (5) recessed in said housing (1) for securing a humidity sensor assembly (3). The humidity meter also has an electronic circuit (2) mounted on a printed circuit board (21) fixed in said housing (1), for processing humidity signal supplied by said humidity sensor assembly (3). Some examples of the process are analog-digital conversion of measured humidity signal, visible indication on a display screen, and/or interface with external circuit. Said humidity sensor assembly (3) is removably fixed on said printed circuit board (21) which doubles as a bottom wall (53) of said sensor room (5).Type: GrantFiled: June 15, 1994Date of Patent: March 14, 1995Assignee: TDK CorporationInventors: Tsutomu Kotani, Shiro Nakagawa
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Patent number: 5317274Abstract: A humidity meter includes a humidity-frequency converter (2) which is essentially a pulse oscillator, the oscillation frequency of which depends upon the impedance of a humidity sensor (1), a differentiation circuit (3) and a wave-form shaping circuit (4) which essentially operate as a pulse width modulator for adjusting pulse width of an output pulse of the converter (2) for assuring a linear relationship between humidity and the output signal, and an integrator (6) for integrating the output of the pulse width modulator to provide an output signal as a DC level. A feedback path (5) is provided to apply the output signal to the pulse width modulator for assuring a linear output irrespective of the exponential characteristics of the humidity sensor. Said differentiation circuit (3) has a capacitor (31), a first variable impedance element (32) which is controlled by said feedback path , and a second variable impedance element (33) coupled in series with the first variable impedance element (32).Type: GrantFiled: December 8, 1992Date of Patent: May 31, 1994Assignee: TDK CorporationInventors: Shiro Nakagawa, Atsuko Tsuchida
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Patent number: 5310425Abstract: A toner concentration detecting device for detecting a toner concentration of a two component developer including a differential transformer which is connected with a phase detecting circuit. A variable capacitance diode is connected between the primary coil and the secondary coil and a variable resistor is provided to supply the variable capacitance diode with a DC voltage to vary the capacitance of the diode. The variable resistor and DC voltage are located at a remote location from the transformer.Type: GrantFiled: February 9, 1993Date of Patent: May 10, 1994Assignee: TDK CorporationInventors: Shiro Nakagawa, Taisuke Domon, Takehiro Imai, Eiji Takahishi
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Patent number: 5305005Abstract: An A/D converter system has an A/D converter element (10) which provides a first predetermined number of digital output bits for each input analog signal. An addition device (12,70) adds linear slope potential to the input analog signal. A calculator (14) provides an average of a plurality of digital output signals of the A/D converter element so that the average has larger number of bits than the first predetermined number. The addition device is implemented by a time constant circuit (70) which functions as an integral circuit for an input analog signal, and functions as a differential circuit for a slope potential.Type: GrantFiled: June 11, 1992Date of Patent: April 19, 1994Assignee: TDK CorporationInventors: Shiro Nakagawa, Atsuko Tsuchida, Eiji Takahashi
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Patent number: 5065625Abstract: A humidity meter includes a humidity-frequency converter which is essentially a pulse oscillator, the frequency of which depends upon the impedance of a humidity sensor, a pulse width modulator for adjusting pulse width of an output pulse of the converter for assuring a linear relationship between humidity and the output signal, and an integrator for integrating the output of the pulse width modulator to provide an output signal as a DC level. A feedback path is provided to apply the output signal to the pulse width modulator for assuring a linear output irrespective of the exponential characteristics of the humidity sensor.Type: GrantFiled: May 2, 1990Date of Patent: November 19, 1991Assignee: TDK CorporationInventors: Shiro Nakagawa, Taisuke Domon, Takehiro Imai, Atsuko Tsuchida
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Patent number: 4599718Abstract: A method for erasing a light recording medium comprising a thermoplastic resin having a number average molecular weight of 30,000 or less wherein a recording pit is refilled by using a light beam diameter greater than the pit diameter.Type: GrantFiled: March 8, 1985Date of Patent: July 8, 1986Assignee: TDK Electronics Co., Ltd.Inventors: Shiro Nakagawa, Akihiko Kuroiwa, Kenryo Nanba
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Patent number: 4530080Abstract: A simple heat mode optical recording system uses a laser beam comprised of a first laser beam and a second laser beam. The energy density of each beam is less than the threshold level for effecting the recording data on a recording medium, but the sum of the energy density of the two beams exceeds the threshold level. The second beam functions to pre-heat the recording medium, and is implemented by a powerful inexpensive LED laser, and the first beam functions to write and/or read data and has a sharp area to increase the storage capacity. Those two beams are focused on the recording medium by using a single focusing control means.Type: GrantFiled: March 29, 1982Date of Patent: July 16, 1985Assignee: TDK Electronics Co., Ltd.Inventors: Toshiki Aoi, Shiro Nakagawa