Patents by Inventor Hiroyuki Aizawa
Hiroyuki Aizawa 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: 8596740Abstract: A liquid jet apparatus according to the present invention includes a drive circuit adapted to apply a drive signal to an actuator of a liquid jet head, and a power supply voltage control circuit adapted to control a power supply voltage to the drive signal to be a waveform voltage set previously based on a reference signal obtained from one of the drive signal and a signal in a generation stage of the drive signal.Type: GrantFiled: January 18, 2012Date of Patent: December 3, 2013Assignee: Seiko Epson CorporationInventors: Atsushi Oshima, Kunio Tabata, Noritaka Ide, Shinichi Miyazaki, Hiroyuki Aizawa, Seiichi Taniguchi
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Patent number: 8590403Abstract: An inertial force sensor is composed of a plurality of arms and an oscillator having a base for linking the arms, in which a trimming slit is formed on a part of the arm except for a ridge portion, thus controlling damage to a tuning fork arm to be caused by the trimming.Type: GrantFiled: June 8, 2012Date of Patent: November 26, 2013Assignee: Panasonic CorporationInventors: Satoshi Ohuchi, Hiroyuki Aizawa
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Publication number: 20130283914Abstract: An acceleration sensor includes a frame having a hollow space at an inside thereof, four beams extending from the frame to the hollow space, four plummets connected to ends of the four beams, and four sensing units provided on the four beams. One ends of the beams is connected to portions of the frame opposite to each other with respect to the hollow space. The two plummets face each other across the center of the hollow space. One ends of the other two beams are connected to portions of the frame opposite to each other with respect to the hollow space. The other two plummets face each other across the center of the hollow space. This acceleration sensor reduces variations and temporal changes in its sensitivity.Type: ApplicationFiled: January 20, 2012Publication date: October 31, 2013Applicant: PANASONIC CORPORATIONInventors: Takashi Imanaka, Hiroyuki Aizawa, Hiroki Umehara
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Publication number: 20130228012Abstract: An inertial force sensor includes a detecting device which detects an inertial force, the detecting device having a first orthogonal arm and a supporting portion, the first orthogonal arm having a first arm and a second arm fixed in a substantially orthogonal direction, and the supporting portion supporting the first arm. The second arm has a folding portion. In this configuration, there is provided a small inertial force sensor which realizes detection of a plurality of different inertial forces and detection of inertial forces of a plurality of detection axes.Type: ApplicationFiled: April 12, 2013Publication date: September 5, 2013Applicant: Panasonic CorporationInventors: Satoshi Ohuchi, Hiroyuki Aizawa, Jiro Terada, Takami Ishida, Ichirou Satou, Hideo Ohkoshi, Yohei Ashimori
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Patent number: 8434362Abstract: An inertial force sensor includes a detecting device which detects an inertial force, the detecting device having a first orthogonal arm and a supporting portion, the first orthogonal arm having a first arm and a second arm fixed in a substantially orthogonal direction, and the supporting portion supporting the first arm. The second arm has a folding portion. In this configuration, there is provided a small inertial force sensor which realizes detection of a plurality of different inertial forces and detection of inertial forces of a plurality of detection axes.Type: GrantFiled: August 1, 2011Date of Patent: May 7, 2013Assignee: Panasonic CorporationInventors: Satoshi Ohuchi, Hiroyuki Aizawa, Jiro Terada, Takami Ishida, Ichirou Satou, Hideo Ohkoshi, Yohei Ashimori
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Patent number: 8376486Abstract: A liquid jet apparatus according to the present invention includes a drive waveform generator adapted to generate a drive waveform signal, a modulator adapted to execute pulse modulation on the drive waveform signal, a digital power amplifier adapted to power-amplify the modulated signal, on which the pulse modulation is executed by the modulator, with a pair of switching elements push-pull coupled with each other, a low pass filter adapted to smooth the amplified digital signal obtained by the power-amplification of the digital power amplifier, and a modulation period modification circuit adapted to modify a modulation period of the pulse modulation of the modulator based on data of the drive waveform signal.Type: GrantFiled: December 22, 2008Date of Patent: February 19, 2013Assignee: Seiko Epson CorporationInventors: Noritaka Ide, Kunio Tabata, Atsushi Oshima, Shinichi Miyazaki, Hiroyuki Aizawa, Seiichi Taniguchi
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Patent number: 8308254Abstract: A liquid jet apparatus according to the invention is a liquid jet apparatus adapted to emit a jet of a liquid by driving an actuator of a liquid jet head with a drive signal including a digital power amplifier and a low pass filter provided to the liquid jet head so as to correspond to the actuator, and adapted to power-amplify and smooth a modified signal from a control circuit to form the drive signal, wherein the low pass filter is coupled directly with the actuator, and the digital power amplifier is provided with a pair of switching elements and a gate drive circuit, and ON-OFF controls the gate drive circuit based on print data, thereby performing one of output and halt of the drive signal.Type: GrantFiled: February 20, 2009Date of Patent: November 13, 2012Assignee: Seiko Epson CorporationInventors: Kunio Tabata, Atsushi Oshima, Noritaka Ide, Shinichi Miyazaki, Hiroyuki Aizawa, Seiichi Taniguchi
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Publication number: 20120240678Abstract: An inertial force sensor is composed of a plurality of arms and an oscillator having a base for linking the arms, in which a trimming slit is formed on a part of the arm except for a ridge portion, thus controlling damage to a tuning fork arm to be caused by the trimming.Type: ApplicationFiled: June 8, 2012Publication date: September 27, 2012Applicant: PANASONIC CORPORATIONInventors: Satoshi Ohuchi, Hiroyuki Aizawa
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Publication number: 20120227489Abstract: An angular velocity sensor includes a support body, a retaining portion connected to the support body, first to fourth weights, first to fourth arms, a drive unit for driving the first to fourth arms, and a monitor unit for detecting displacements of the first to fourth arms. An X-axis, a Y-axis, and a Z-axis that are perpendicular to each other are defined. The detector unit is symmetrical with respect to both an axis parallel to the X-axis and an axis parallel to the Y-axis. This angular velocity sensor can cancel an undesired signal caused by external disturbances, such as acceleration or impact, thus detecting an angular velocity accurately.Type: ApplicationFiled: January 27, 2011Publication date: September 13, 2012Inventors: Takashi Imanaka, Hiroyuki Aizawa
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Patent number: 8215190Abstract: An inertial force sensor is composed of a plurality of arms and an oscillator having a base for linking the arms, in which a trimming slit is formed on a part of the arm except for a ridge portion, thus controlling damage to a tuning fork arm to be caused by the trimming.Type: GrantFiled: April 10, 2007Date of Patent: July 10, 2012Assignee: Panasonic CorporationInventors: Satoshi Ohuchi, Hiroyuki Aizawa
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Patent number: 8201450Abstract: An angular velocity sensor comprising a fixed part, a weight coupled with the fixed part via a flexible part having a bending part, a first electrode disposed outside the bending part, and a second electrode disposed inside the bending part, in which the first electrode and the second electrode have an upper electrode and a lower electrode interposed by a piezoelectric layer, respectively, and the width of the first electrode is smaller than the width of the second electrode, and the difference of the amounts of electric charges generated at the first electrode and the second electrode can be suppressed thereby improving the accuracy of detection.Type: GrantFiled: August 21, 2008Date of Patent: June 19, 2012Assignee: Panasonic CorporationInventors: Satoshi Ohuchi, Hiroyuki Aizawa
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Patent number: 8201449Abstract: A sensor includes detecting element (28) with an acceleration sensor, which is formed of weight (18) coupled to rigid section (14) via flexible section (16), substrate (10) confronting weight (18), and an electrode section including opposed electrodes (20, 22, 24, 26) placed on respective opposed faces of weight (18) and substrate (10). This structure prevents weight (18) from moving along Z-axis, so that a detection accuracy of acceleration occurring along X-axis or Y-axis can be improved.Type: GrantFiled: November 9, 2007Date of Patent: June 19, 2012Assignee: Panasonic CorporationInventors: Satoshi Ohuchi, Toshiyuki Nozoe, Hiroyuki Aizawa
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Publication number: 20120120137Abstract: A liquid jet apparatus according to the present invention includes a drive circuit adapted to apply a drive signal to an actuator of a liquid jet head, and a power supply voltage control circuit adapted to control a power supply voltage to the drive signal to be a waveform voltage set previously based on a reference signal obtained from one of the drive signal and a signal in a generation stage of the drive signal,Type: ApplicationFiled: January 18, 2012Publication date: May 17, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Atsushi OSHIMA, Kunio TABATA, Noritaka IDE, Shinichi MIYAZAKI, Hiroyuki AIZAWA, Seiichi TANIGUCHI
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Patent number: 8122766Abstract: Inertial force sensor includes detecting element that detects inertial force. Detecting element includes: two first orthogonal arms each having first arm and second arm that are connected to each other in a substantially orthogonal direction; support portion that supports two first arms; fixing arms; and weights. Second arms include: bent portions; facing portions that are bent at bent portions so as to face second arms; driving electrodes that are formed in two facing portions facing each other, and drive and vibrate facing portions; and detection electrodes that are formed in the other two facing portions facing each other, and detect the distortion of facing portions. According to this structure, it is possible to achieve small inertial force sensor capable of detecting a plurality of different inertial forces and inertial forces acting on a plurality of detection axes.Type: GrantFiled: March 26, 2007Date of Patent: February 28, 2012Assignee: Panasonic CorporationInventors: Hiroyuki Aizawa, Satoshi Ohuchi
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Patent number: 8117914Abstract: An inertia force sensor includes a detection element having an acceleration detection section (1). This detection element (1) has: two orthogonal arms obtained by connecting first arms (8) to second arms (10) so as to be orthogonal to each other, a support section (12) for supporting one ends of the two first arm (8), a fixation section (4) connected to the other ends of the two first arms (8), and weight sections (2) fixed to tip ends of the second arms (10). The first arm (8) has a thickness thinner than thicknesses of the second arm (10) and weight section (2) to thereby provide an increased detection sensitivity.Type: GrantFiled: February 19, 2008Date of Patent: February 21, 2012Assignee: Panasonic CorporationInventors: Satoshi Ohuchi, Hiroyuki Aizawa
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Publication number: 20110283796Abstract: An inertial force sensor includes a detecting device which detects an inertial force, the detecting device having a first orthogonal arm and a supporting portion, the first orthogonal arm having a first arm and a second arm fixed in a substantially orthogonal direction, and the supporting portion supporting the first arm. The second arm has a folding portion. In this configuration, there is provided a small inertial force sensor which realizes detection of a plurality of different inertial forces and detection of inertial forces of a plurality of detection axes.Type: ApplicationFiled: August 1, 2011Publication date: November 24, 2011Applicant: PANASONIC CORPORATIONInventors: Satoshi Ohuchi, Hiroyuki Aizawa, Jiro Terada, Takami Ishida, Ichirou Satou, Hideo Ohkoshi, Yohei Ashimori
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Patent number: 8061203Abstract: A combined detection element (6) of the present invention includes an acceleration detection element (2) and an angular velocity detection element (4) stacked on the acceleration detection element (2) in such a manner as to avoid contacting with the weight parts (12) of the acceleration detection element (2). The angular velocity detection element (4) includes a recess (26) in a surface thereof facing the weight parts (12) of the acceleration detection element (2) so as to avoid contacting with the weight parts (12). At least part of the recess (26) has a depth not exceeding the vertical range of motion of weight parts (12), thereby suppressing the upward movement of weight parts (12).Type: GrantFiled: August 9, 2007Date of Patent: November 22, 2011Assignee: Panasonic CorporationInventors: Hiroyuki Aizawa, Satoshi Ohuchi
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Patent number: 8040144Abstract: An interface circuit includes a reference voltage generation circuit to generate a reference voltage, a differential voltage signal generation circuit to convert send data input in sending data into a pair of differential voltage signals and output the pair of differential voltage signals based on the reference voltage generated by the reference voltage generation circuit, a receiver to convert a pair of differential voltage signals input in receiving data and output received data, and a receiver test circuit to perform a sensitivity test of the receiver, the receiver test circuit having a resistance circuit to generate a pair of differential voltage signals having a potential difference being necessary for the sensitivity test of the receiver.Type: GrantFiled: March 28, 2008Date of Patent: October 18, 2011Assignee: Renesas Electronics CorporationInventor: Hiroyuki Aizawa
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Publication number: 20110203371Abstract: An angular velocity sensor comprising a fixed part, a weight coupled with the fixed part via a flexible part having a bending part, a first electrode disposed outside the bending part, and a second electrode disposed inside the bending part, in which the first electrode and the second electrode have an upper electrode and a lower electrode interposed by a piezoelectric layer, respectively, and the width of the first electrode is smaller than the width of the second electrode, and the difference of the amounts of electric charges generated at the first electrode and the second electrode can be suppressed thereby improving the accuracy of detection.Type: ApplicationFiled: August 21, 2008Publication date: August 25, 2011Applicant: PANASONIC CORPORATIONInventors: Satoshi Ohuchi, Hiroyuki Aizawa
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Publication number: 20100229645Abstract: Inertial force sensor includes detecting element that detects inertial force. Detecting element includes: two first orthogonal arms each having first arm and second arm that are connected to each other in a substantially orthogonal direction; support portion that supports two first arms; fixing arms; and weights. Second arms include: bent portions; facing portions that are bent at bent portions so as to face second arms; driving electrodes that are formed in two facing portions facing each other, and drive and vibrate facing portions; and detection electrodes that are formed in the other two facing portions facing each other, and detect the distortion of facing portions. According to this structure, it is possible to achieve small inertial force sensor capable of detecting a plurality of different inertial forces and inertial forces acting on a plurality of detection axes.Type: ApplicationFiled: March 26, 2007Publication date: September 16, 2010Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Hiroyuki Aizawa, Satoshi Ohuchi