Patents by Inventor Keiichi Okano
Keiichi Okano 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: 6820484Abstract: A vibrator that produces bending vibration with both ends unsupported is mounted on one principal surface of a mounting board, and a driving-and-detecting circuit component is also mounted to cross over an antinode center line of bending vibration of the mounting board due to resonance. The original self-resonance frequency of bending vibration of the mounting board itself is lower than the frequency of bending vibration of the vibrator. The modified self-resonance frequency of bending vibration of the mounting board when the vibrator and the driving-and-detecting circuit component are mounted thereon is higher than the original self-resonance frequency, and does not coincide with the frequency of bending vibration of the vibrator.Type: GrantFiled: March 25, 2003Date of Patent: November 23, 2004Assignee: Murata Manufacturing Co, Ltd.Inventors: Katsumi Fujimoto, Keiichi Okano, Masato Koike, Hironari Yamamoto
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Patent number: 6770956Abstract: A vibration gyro which is a sensor circuit module includes a packaging substrate, a vibrator mounted on the substrate, a chip type semiconductor element mounted by flip-chip bonding, a chip element, and a cover. The portion of the end surfaces of the packaging substrate in which no through-hole terminals are formed is coated with a light-shielding coating material which is a light-transmission-stopping member. Preferably, the color of the light-shielding coating material is as dark as possible, and is black, if possible.Type: GrantFiled: April 23, 2002Date of Patent: August 3, 2004Assignee: Murata Manufacturing Co., Ltd.Inventors: Katsumi Fujimoto, Keiichi Okano, Masato Koike
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Publication number: 20030217609Abstract: A vibrator that produces bending vibration with both ends unsupported is mounted on one principal surface of a mounting board, and a driving-and-detecting circuit component is also mounted to cross over an antinode center line of bending vibration of the mounting board due to resonance. The original self-resonance frequency of bending vibration of the mounting board itself is lower than the frequency of bending vibration of the vibrator. The modified self-resonance frequency of bending vibration of the mounting board when the vibrator and the driving-and-detecting circuit component are mounted thereon is higher than the original self-resonance frequency, and does not coincide with the frequency of bending vibration of the vibrator.Type: ApplicationFiled: March 25, 2003Publication date: November 27, 2003Inventors: Katsumi Fujimoto, Keiichi Okano, Masato Koike, Hironari Yamamoto
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Patent number: 6584842Abstract: An angular velocity sensor includes a vibrator. A differential amplifier circuit outputs a differential signal including a Coriolis component from the vibrator. The differential signal is converted into a digital signal by an A/D converter. A Hilbert transformer shifts the differential signal by &pgr;/2. Two multipliers squares the original differential signal and the &pgr;/2-phase-shifted differential signal, respectively, and an adder computes the sum of the squares. A square root circuit computes the square root of the sum and outputs a magnitude signal proportional to Coriolis force.Type: GrantFiled: June 14, 2001Date of Patent: July 1, 2003Assignee: Murata Manufacturing Co., Ltd.Inventors: Katsumi Fujimoto, Keiichi Okano, Kohichi Murohashi
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Publication number: 20020167063Abstract: A vibration gyro which is a sensor circuit module includes a packaging substrate, a vibrator mounted on the substrate, a chip type semiconductor element mounted by flip-chip bonding, a chip element, and a cover. The portion of the end surfaces of the packaging substrate in which no through-hole terminals are formed is coated with a light-shielding coating material which is a light-transmission-stopping member. Preferably, the color of the light-shielding coating material is as dark as possible, and is black, if possible.Type: ApplicationFiled: April 23, 2002Publication date: November 14, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Katsumi Fujimoto, Keiichi Okano, Masato Koike
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Publication number: 20020073778Abstract: An angular velocity sensor includes a vibrator. A differential amplifier circuit outputs a differential signal including a Coriolis component from the vibrator. The differential signal is converted into a digital signal by an A/D converter. A Hilbert transformer shifts the differential signal by &pgr;/2. Two multipliers squares the original differential signal and the &pgr;/2-phase-shifted differential signal, respectively, and an adder computes the sum of the squares. A square root circuit computes the square root of the sum and outputs a magnitude signal proportional to Coriolis force.Type: ApplicationFiled: June 14, 2001Publication date: June 20, 2002Applicant: Murata Manufacturing Co., Ltd.Inventors: Katsumi Fujimoto, Keiichi Okano, Kohichi Murohashi
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Patent number: 6161432Abstract: A vibrating gyroscope includes a vibrating body and at least one driving member located on the vibrating body. The at least one driving member is arranged vibrate the vibrating body in a direction that is substantially perpendicular to an axis of the vibrating body. At least two detection members are are arranged so as to be spaced from each other and operatively connected to the vibrating body. The at least two detection members are located on opposite sides of a plane which includes the axis and a vibrating direction of the vibrating body such that the at least two detection members detect vibration of the vibrating body at substantially the same amount and detect at a different amount a Coriolis force generated by a rotational angular velocity applied to the vibrating body..Type: GrantFiled: September 1, 1998Date of Patent: December 19, 2000Assignee: Murata Manufacturing Co., Ltd.Inventors: Tohru Kasanami, Takeshi Nakamura, Keiichi Okano, Yoshiko Morishita
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Patent number: 6016699Abstract: A method of forming a vibrating gyroscope includes the steps of providing a vibrating body and disposing at least one driving member on the vibrating body so that the at least one driving member is arranged to generate vibration in the vibrating body in a vibrating direction that is substantially perpendicular to an axis of the vibrating body. Then, at least two detection members are disposed on the vibrating body such that the at least two detection members are spaced from each other, located on opposite sides of a plane including the axis and the vibrating direction of the vibrating body, arranged to detect a rotational angular velocity applied to the vibrating body and arranged in a non-parallel relationship relative to each other and in a non-parallel relationship relative to the at least one driving member.Type: GrantFiled: September 1, 1998Date of Patent: January 25, 2000Assignee: Murata Manufacturing Co., Ltd.Inventors: Tohru Kasanami, Takeshi Nakamura, Keiichi Okano, Yoshiko Morishita
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Patent number: 6016698Abstract: A vibrating gyroscope comprising includes a vibrating body. At least one driving member is located on the vibrating body and vibrates the vibrating body in a vibrating direction that is substantially perpendicular to an axis of said vibrating body. At least two detection members are located so as to be spaced from each other on the vibrating body and located on opposite sides of a plane including the axis and the vibrating direction of the vibrating body. The at least one driving member is arranged in a non-parallel relationship relative to each of the at least two detection members. The at least two detection members are arranged to detect a rotational angular velocity applied to the vibrating body and the at least two detection members are arranged in a non-parallel relationship relative to each other.Type: GrantFiled: September 1, 1998Date of Patent: January 25, 2000Assignee: Murata Manufacturing Co., Ltd.Inventors: Tohru Kasanami, Takeshi Nakamura, Keiichi Okano, Yoshiko Morishita
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Patent number: 5874674Abstract: The vibrator includes, for example, a triangular prism shaped vibrating body. On each of three side faces of the vibrating body, piezoelectric elements are formed respectively. The vibrating body makes bending vibration by giving a driving signal to one or two piezoelectric elements. The vibrator is used in a vibratory gyroscope. In this case, for example, one piezoelectric element is used for vibrating the vibrator. When a rotating force is applied to the vibratory gyroscope, a Coriolis force is exerted to produce output voltages on the remaining two piezoelectric elements corresponding to the rotational angular velocity.Type: GrantFiled: January 11, 1996Date of Patent: February 23, 1999Assignee: Murata Manufacturing Co., Ltd.Inventors: Tohru Kasanami, Takeshi Nakamura, Keiichi Okano, Yoshiko Morishita
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Patent number: 5569969Abstract: The vibrator includes for example, a triangular prism shaped vibrating body. On each of three side faces of the vibrating body, piezoelectric elements are formed respectively. The vibrating body makes bending vibration by giving a driving signal to one or two piezoelectric elements. The vibrator is used in a vibratory gyroscope. In this case, for example, one piezoelectric element is used for vibrating the vibrator. When a rotating force is applied to the vibratory gyroscope, a Coriolis force is exerted to produce output voltages on the remaining two piezoelectric elements corresponding to the rotational angular velocity.Type: GrantFiled: June 7, 1995Date of Patent: October 29, 1996Assignee: Murata Manufacturing Co., Ltd.Inventors: Tohru Kasanami, Takeshi Nakamura, Keiichi Okano, Yoshiko Morishita
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Patent number: 5505085Abstract: The vibrator includes, for example, a triangular prism shaped vibrating body. On each of three side faces of the vibrating body, piezoelectric elements are formed respectively. The vibrating body makes bending vibration by giving a driving signal to one or two piezoelectric elements. The vibrator is used in a vibratory gyroscope. In this case, for example, one piezoelectric element is used for vibrating the vibrator. When a rotating force is applied to the vibratory gyroscope, a Coriolis force is exerted to produce output voltages on the remaining two piezoelectric elements corresponding to the rotational angular velocity.Type: GrantFiled: June 22, 1994Date of Patent: April 9, 1996Assignee: Murata Manufacturing Co., Ltd.Inventors: Tohru Kasanami, Takeshi Nakamura, Keiichi Okano, Yoshiko Morishita
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Patent number: 5493166Abstract: The vibrator includes, for example, a triangular prism shaped vibrating body. On each of three side faces of the vibrating body, piezoelectric elements are formed respectively. The vibrating body makes bending vibration by giving a driving signal to one or two piezoelectric elements. The vibrator is used in a vibratory gyroscope. In this case, for example, one piezoelectric element is used for vibrating the vibrator. When a rotating force is applied to the vibratory gyroscope, a Coriolis force is exerted to produce output voltages on the remaining two piezoelectric elements corresponding to the rotational angular velocity.Type: GrantFiled: July 18, 1994Date of Patent: February 20, 1996Assignee: Murata Manufacturing Co., Ltd.Inventors: Tohru Kasanami, Takeshi Nakamura, Keiichi Okano, Yoshiki Morishita
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Patent number: 5349857Abstract: The vibrator includes, for example, a triangular prism shaped vibrating body. On each of three side faces of the vibrating body, piezoelectric elements are formed respectively. The vibrating body makes bending vibration by giving a driving signal to one or two piezoelectric elements. The vibrator is used in a vibratory gyroscope. In this case, for example, one piezoelectric element is used for vibrating the vibrator. When a rotating force is applied to the vibratory gyroscope, a Coriolis force is exerted to produce output voltages on the remaining two piezoelectric elements corresponding to the rotational angular velocity.Type: GrantFiled: April 12, 1993Date of Patent: September 27, 1994Assignee: Murata Manufacturing Co., Ltd.Inventors: Tohru Kasanami, Takeshi Nakamura, Keiichi Okano, Yoshiko Morishita