Patents by Inventor Akihito Saito
Akihito Saito 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: 20180376068Abstract: A calibration method for an imaging device including a camera module including an imaging element and a lens installed on a path of light incident on the imaging element; a blur detection element configured to detect an amount of blur acting on the imaging device; and a gravity detection element configured to determine a direction of gravity acting on the imaging device. The calibration method includes: detecting a first angle corresponding to a deviation of a direction of a coordinate axis of the blur detection element with respect to the direction of gravity; detecting a second angle corresponding to a deviation of a direction of the camera module with respect to the direction of gravity; and acquiring a parameter for correcting a detection signal of the blur detection element based on the first angle and the second angle.Type: ApplicationFiled: June 25, 2018Publication date: December 27, 2018Inventors: Atsushi SHIMATANI, Akihito SAITO, Yoshihiro SEKIMOTO
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Publication number: 20180343393Abstract: An imaging device includes: imaging lens displaceable in first and second directions in plane perpendicular to optical axis; actuator positioning the imaging lens in the first and second directions; position detector generating first and second position detection signals Hx and Hy, Hx including crosstalk component caused by displacing the imaging lens in the second direction, and Hy including crosstalk component caused by displacing the imaging lens in the first direction; crosstalk compensator correcting Hx and Hy to reduce crosstalk components included in Hx and Hy; and driver controlling the actuator based on corrected first and second position detection signals Hx? and Hy?, wherein when ratio of Hy to Hx while driving the imaging lens in the first direction is ? and ratio of Hx to Hy while driving the imaging lens in the second direction is ?, the crosstalk compensator reduces crosstalk components included in Hx and Hy.Type: ApplicationFiled: May 25, 2018Publication date: November 29, 2018Inventors: Jun MAEDE, Akihito SAITO, Hiromichi TANIMUKAI, Yoshihiro SEKIMOTO
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Publication number: 20180295286Abstract: An imaging device includes an imaging lens, an imaging element that captures an image transmitted through the imaging lens, a blur detection part configured to detect a blur, an actuator configured to determine a position of the imaging lens, and an actuator driver configured to control the actuator in accordance with a blur detection signal from the blur detection part. The shift of the image occurring when forcibly changing the position of the imaging lens is corrected by shift of an effective pixel area of the imaging element according to the forcible change amount of the position of the imaging lens.Type: ApplicationFiled: April 3, 2018Publication date: October 11, 2018Inventors: Jun MAEDE, Akihito SAITO, Yoshihiro SEKIMOTO
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Publication number: 20180249082Abstract: An imaging device includes: an imaging element; a lens disposed on a path of incident light to the imaging element; an actuator configured to displace the lens in a plane perpendicular to an optical axis; a position detecting element configured to generate a position detection signal indicating a displacement of the lens; and an actuator driver configured to feedback-control the actuator based on the position detection signal and a target code indicating a target displacement of the lens. The actuator driver includes: a correction circuit that converts a first detection code corresponding to the position detection signal into a second detection code having a linear relationship with an actual displacement of the lens; and a control circuit that controls the actuator so that the second detection code approaches the target code.Type: ApplicationFiled: February 22, 2018Publication date: August 30, 2018Inventors: Akihito SAITO, Hiromichi TANIMUKAI, Jun MAEDE, Yoshihiro SEKIMOTO
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Publication number: 20180100985Abstract: A position detection unit generates a position detection value PFB that indicates the position of a control target. A temperature detection unit generates a temperature detection value that indicates the temperature. A correction unit corrects the position detection value PFB. A controller generates a control instruction value SREF such that the position detection value PFB_CMP subjected to the correction matches a position instruction value PREF that indicates the target position of the control target. A driver unit applies a driving signal that corresponds to the control instruction value SREF to an actuator. The correction unit corrects the position detection value PFB such that the relation between the position detection value PFB and the actual position exhibits linearity that is uniform independent of the temperature.Type: ApplicationFiled: October 6, 2017Publication date: April 12, 2018Inventors: Jun MAEDE, Akihito SAITO, Yoshihiro SEKIMOTO
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Patent number: 8958689Abstract: There is provided a lens control device that feeds a motor current to a lens drive motor which drives lens according to the motor current, the lens control device including: a servo computation portion that calculates a motor current setting value such that a deviation of the position of the lens from a target position to which a correction offset has been added is reduced; a motor driver that generates the motor current according to the motor current setting value; and a calibration computation portion that adjusts the correction offset such that an average value of the motor current approaches zero.Type: GrantFiled: April 23, 2014Date of Patent: February 17, 2015Assignee: Rohm Co., Ltd.Inventors: Akihito Saito, Koji Saito
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Publication number: 20140233932Abstract: There is provided a lens control device that feeds a motor current to a lens drive motor which drives lens according to the motor current, the lens control device including: a servo computation portion that calculates a motor current setting value such that a deviation of the position of the lens from a target position to which a correction offset has been added is reduced; a motor driver that generates the motor current according to the motor current setting value; and a calibration computation portion that adjusts the correction offset such that an average value of the motor current approaches zero.Type: ApplicationFiled: April 23, 2014Publication date: August 21, 2014Applicant: Rohm Co., Ltd.Inventors: Akihito Saito, Koji Saito
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Patent number: 8744254Abstract: There is provided a lens control device that feeds a motor current to a lens drive motor which drives lens according to the motor current, the lens control device including: a servo computation portion that calculates a motor current setting value such that a deviation of the position of the lens to which a correction offset has been adjusted from a target position is reduced; a motor driver that generates the motor current according to the motor current setting value; and a calibration computation portion that adjusts the correction offset such that an average value of the motor current approaches zero.Type: GrantFiled: August 7, 2013Date of Patent: June 3, 2014Assignee: Rohm Co., Ltd.Inventors: Akihito Saito, Koji Saito
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Publication number: 20130322861Abstract: There is provided a lens control device that feeds a motor current to a lens drive motor which drives lens according to the motor current, the lens control device including: a servo computation portion that calculates a motor current setting value such that a deviation of the position of the lens to which a correction offset has been adjusted from a target position is reduced; a motor driver that generates the motor current according to the motor current setting value; and a calibration computation portion that adjusts the correction offset such that an average value of the motor current approaches zero.Type: ApplicationFiled: August 7, 2013Publication date: December 5, 2013Applicant: Rohm Co., Ltd.Inventors: Akihito Saito, Koji Saito
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Patent number: 8526803Abstract: There is provided a lens control device that feeds a motor current to a lens drive motor which drives lens according to the motor current, the lens control device including: a servo computation portion that calculates a motor current setting value such that a deviation of the position of the lens from a target position to which a correction offset has been added is reduced; a motor driver that generates the motor current according to the motor current setting value; and a calibration computation portion that adjusts the correction offset such that an average value of the motor current approaches zero.Type: GrantFiled: December 14, 2011Date of Patent: September 3, 2013Assignee: Rohm Co., Ltd.Inventors: Akihito Saito, Koji Saito
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Patent number: 8509611Abstract: A lens controlling device disclosed herein includes: a servo calculation section which calculates a motor current setting value such that a lens position detection signal which is inputted from a photo reflector agrees with a predetermined target lens position setting signal; a motor driver which generates a motor current in accordance with the motor current setting value, and supplies the motor current to a lens drive motor; and a temperature correction calculation section which monitors the motor current setting value to generate the temperature correction signal, and corrects either one of the target lens position setting signal and the lens position detection signal.Type: GrantFiled: November 3, 2011Date of Patent: August 13, 2013Assignee: Rohm Co., Ltd.Inventors: Koji Saito, Akihito Saito
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Publication number: 20120163784Abstract: There is provided a lens control device that feeds a motor current to a lens drive motor which drives lens according to the motor current, the lens control device including: a servo computation portion that calculates a motor current setting value such that a deviation of the position of the lens from a target position to which a correction offset has been added is reduced; a motor driver that generates the motor current according to the motor current setting value; and a calibration computation portion that adjusts the correction offset such that an average value of the motor current approaches zero.Type: ApplicationFiled: December 14, 2011Publication date: June 28, 2012Applicant: ROHM CO., LTD.Inventors: Akihito Saito, Koji Saito
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Publication number: 20120114322Abstract: A lens controlling device disclosed herein includes: a servo calculation section which calculates a motor current setting value such that a lens position detection signal which is inputted from a photo reflector agrees with a predetermined target lens position setting signal; a motor driver which generates a motor current in accordance with the motor current setting value, and supplies the motor current to a lens drive motor; and a temperature correction calculation section which monitors the motor current setting value to generate the temperature correction signal, and corrects either one of the target lens position setting signal and the lens position detection signal.Type: ApplicationFiled: November 3, 2011Publication date: May 10, 2012Applicant: ROHM CO., LTD.Inventors: Koji Saito, Akihito Saito
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Patent number: 7510781Abstract: Provided are a novel spiro compound, and an organic luminescence device using the spiro compound and having an optical output with an extremely high efficiency and a high luminance, and an extremely high durability. The Spiro compound is represented by the following general formula [I]: (wherein R1, R2, R3, and R4 represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, a cyano group, or a halogen atom, and R1, R2, R3, and R4 may be identical or different from each other; and Ar1 and Ar2 represent a substituted or unsubstituted condensed polycyclic aromatic group or a substituted or unsubstituted condensed polycyclic heterocyclic group, which may be identical or different from each other.Type: GrantFiled: August 12, 2003Date of Patent: March 31, 2009Assignee: Canon Kabushiki KaishaInventors: Koichi Suzuki, Mizuho Hiraoki, Akihiro Senoo, Naoki Yamada, Chika Negishi, Akihito Saito
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Publication number: 20060134425Abstract: Provided are a novel spiro compound, and an organic luminescence device using the spiro compound and having an optical output with an extremely high efficiency and a high luminance, and an extremely high durability. The Spiro compound is represented by the following general formula [I]: (wherein R1, R2, R3, and R4 represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted amino group, a cyano group, or a halogen atom, and R1, R2, R3, and R4 may be identical or different from each other; and Ar1 and Ar2 represent a substituted or unsubstituted condensed polycyclic aromatic group or a substituted or unsubstituted condensed polycyclic heterocyclic group, which may be identical or different from each other.Type: ApplicationFiled: August 12, 2003Publication date: June 22, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Koichi Suzuki, Mizuho Hiraoka, Akihiro Senoo, Naoki Yamada, Chika Negishi, Akihito Saito
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Patent number: 7034454Abstract: There is provided an organic light emitting device to break through the limit of 25% of internal quantum efficiency and 5% of external quantum efficiency while using singlet luminescence.Type: GrantFiled: December 12, 2003Date of Patent: April 25, 2006Assignee: Canon Kabushiki KaishaInventors: Tatsundo Kawai, Koichi Suzuki, Hiroshi Tanabe, Keiji Okinaka, Naoki Yamada, Chika Negishi, Akihito Saito, Maki Okajima
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Publication number: 20040150327Abstract: There is provided an organic light emitting device to break through the limit of 25% of internal quantum efficiency and 5% of external quantum efficiency while using singlet luminescence.Type: ApplicationFiled: December 12, 2003Publication date: August 5, 2004Applicant: CANON KABUSHIKI KAISHAInventors: Tatsundo Kawai, Koichi Suzuki, Hiroshi Tanabe, Keiji Okinaka, Naoki Yamada, Chika Negishi, Akihito Saito, Maki Okajima