Patents by Inventor Ryoh IZUMOTO
Ryoh IZUMOTO 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: 9543834Abstract: There is provided a switching regulator configured to convert an input voltage into an output voltage. A control unit is configured to perform switching control in response to a result of comparison between a reference voltage and a complex voltage which includes a feedback voltage acquired by feeding back the output voltage, and a derived voltage derived on the basis of an input current.Type: GrantFiled: April 21, 2014Date of Patent: January 10, 2017Assignee: FUJITSU TEN LIMITEDInventors: Ryoh Izumoto, Kiyoshi Koyama
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Patent number: 9496784Abstract: There is provided a switching regulator configured to convert an input voltage into an output voltage. A control unit is configured to perform switching control in response to a result of comparison between a reference voltage and a complex voltage which includes a feedback voltage acquired by feeding back the output voltage, and a derived voltage derived on the basis of an input current.Type: GrantFiled: April 21, 2014Date of Patent: November 15, 2016Assignee: FUJITSU TEN LIMITEDInventors: Ryoh Izumoto, Kiyoshi Koyama
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Patent number: 9362770Abstract: A device control apparatus according to an embodiment includes a monitoring unit, a first processing unit, and a second processing unit. The monitoring unit monitors a state of voltage supply from a battery. When the start of the voltage supply is detected, the first processing unit starts the voltage supply to some devices, operates in a first operation mode, and executes a resume process of the devices. When the resume process is completed, the second processing unit starts the voltage supply to devices other than some devices, initializes states of the devices, and operates in a second operation mode in which consumption power is larger than consumption power of the first operation mode.Type: GrantFiled: January 27, 2014Date of Patent: June 7, 2016Assignee: FUJITSU TEN LIMITEDInventors: Kenji Tada, Kenji Furukawa, Tohru Mikamo, Toshihito Sawai, Hideshi Nishizawa, Takashi Mizushima, Satoru Nakae, Kiyoshi Koyama, Ryoh Izumoto, Mitsuru Hanada
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Patent number: 9234470Abstract: An idling stop device is mounted on a vehicle. A microcomputer has an idling stop function of automatically stopping an engine of the vehicle when a predetermined stop condition is established and automatically starting the engine when a predetermined start condition is established during the stopping of the engine. A detecting unit detects that a power voltage of the microcomputer, which is obtained by dropping a voltage of a battery of the vehicle is lower than a minimal operation voltage of the microcomputer. A storage unit stores voltage decrease information irrespective of a state of the microcomputer if the power voltage is lower than the minimal operation voltage. A power control unit stops supply of power to some of electrical loads to which power is supplied from the battery when the engine is started, if the voltage decrease information is stored in the storage unit.Type: GrantFiled: February 22, 2011Date of Patent: January 12, 2016Assignee: FUJITSU TEN LIMITEDInventors: Ryoh Izumoto, Motoki Komiya, Yuuichiroh Shimizu, Yoshinori Shibachi
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Patent number: 9014942Abstract: An idling stop device installed in a vehicle includes a microcomputer, a detector, a storage, and a controller. The microcomputer automatically stops an engine of the vehicle when a prescribed stopping condition is satisfied, and automatically activates a starter motor of the engine when a prescribed activating condition is satisfied. The detector detects whether a drive voltage of the microcomputer, which is obtained by dropping a voltage of a battery of the vehicle is less than a threshold value. The storage stores, irrespective of a state of the microcomputer, information indicating that the detector has detected that the drive voltage is less than the threshold value. The controller drops an increasing speed of a current for driving the starter motor when the microcomputer activates the stator motor under the condition that the information is stored in the storage.Type: GrantFiled: March 10, 2011Date of Patent: April 21, 2015Assignee: Fujitsu Ten LimitedInventors: Ryoh Izumoto, Motoki Komiya, Yuichiro Shimizu, Yoshinori Shibachi
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Patent number: 8887684Abstract: An idling stop apparatus is provided which can prevent a voltage of a battery from being lowered even when a microcomputer is reset. In an idling stop apparatus when a reset condition is established, reset information indicating that the reset condition is established is stored in a latch circuit and a microcomputer disables an idling stop function when the reset information is stored. The reset information is stored in the latch circuit even when the microcomputer is being reset or even after the microcomputer is reset. Accordingly, the microcomputer after the reset can disable the idling stop function. As a result, it is possible to prevent the voltage of the battery from being lowered due to the idling stop function.Type: GrantFiled: September 17, 2010Date of Patent: November 18, 2014Assignee: Fujitsu Ten LimitedInventors: Ryoh Izumoto, Motoki Komiya, Yuichiro Shimizu, Yoshinori Shibachi
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Publication number: 20140320098Abstract: There is provided a switching regulator configured to convert an input voltage into an output voltage. A control unit is configured to perform switching control in response to a result of comparison between a reference voltage and a complex voltage which includes a feedback voltage acquired by feeding back the output voltage, and a derived voltage derived on the basis of an input current.Type: ApplicationFiled: April 21, 2014Publication date: October 30, 2014Applicant: FUJITSU TEN LIMITEDInventors: Ryoh IZUMOTO, Kiyoshi KOYAMA
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Publication number: 20140210421Abstract: A device control apparatus according to an embodiment includes a monitoring unit, a first processing unit, and a second processing unit. The monitoring unit monitors a state of voltage supply from a battery. When the start of the voltage supply is detected, the first processing unit starts the voltage supply to some devices, operates in a first operation mode, and executes a resume process of the devices. When the resume process is completed, the second processing unit starts the voltage supply to devices other than some devices, initializes states of the devices, and operates in a second operation mode in which consumption power is larger than consumption power of the first operation mode.Type: ApplicationFiled: January 27, 2014Publication date: July 31, 2014Applicant: FUJITSU TEN LIMITEDInventors: Kenji TADA, Kenji FURUKAWA, Tohru MIKAMO, Toshihito SAWAI, Hideshi NISHIZAWA, Takashi MIZUSHIMA, Satoru NAKAE, Kiyoshi KOYAMA, Ryoh IZUMOTO, Mitsuru HANADA
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Patent number: 8674533Abstract: Engine control device includes a delay unit which delays or cuts off a flow of current from a first current system, which directs current to a coil, to a second current system, which directs current to a starter motor. When a starter switch, which turns the flow of current from the power source to the first current system on or off, is turned on and electricity flows to the first current system, the delay unit delays the current flowing from the first current system to the second current system. When electricity flows to the first current system as a result of a controller having turned a first switch on, the delay unit cuts off the flow of electricity from the first current system to the second current system.Type: GrantFiled: August 24, 2010Date of Patent: March 18, 2014Assignee: Fujitsu Ten LimitedInventors: Yuichiro Shimizu, Yoshinori Shibachi, Ryoh Izumoto, Motoki Komiya
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Patent number: 8655574Abstract: An idling stop device is mounted on a vehicle and automatically stops and starts an engine of the vehicle. A microcomputer has an idling stop function of automatically stopping the engine when a predetermined stop condition is established and automatically starting the engine when a predetermined start condition is established during the stopping of the engine. A detecting unit detects that a power voltage of the microcomputer, which is obtained by dropping a voltage of a battery of the vehicle is lower than a minimum operating voltage of the microcomputer. A storage unit stores voltage reduction information irrespective of a state of the microcomputer if the power voltage is lower than the minimum operating voltage. A power control unit causes a capacitor which stores electric charges corresponding to power for driving a starter motor of the engine to supply power to the starter motor when the engine is started, if the voltage reduction information is stored in the storage unit.Type: GrantFiled: March 14, 2011Date of Patent: February 18, 2014Assignee: Fujitsu Ten LimitedInventors: Ryoh Izumoto, Motoki Komiya, Yuuichiroh Shimizu, Yoshinori Shibachi
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Publication number: 20130006491Abstract: An idling stop device installed in a vehicle includes a microcomputer, a detector, a storage, and a controller. The microcomputer automatically stops an engine of the vehicle when a prescribed stopping condition is satisfied, and automatically activates a starter motor of the engine when a prescribed activating condition is satisfied. The detector detects whether a drive voltage of the microcomputer, which is obtained by dropping a voltage of a battery of the vehicle is less than a threshold value. The storage stores, irrespective of a state of the microcomputer, information indicating that the detector has detected that the drive voltage is less than the threshold value. The controller drops an increasing speed of a current for driving the starter motor when the microcomputer activates the stator motor under the condition that the information is stored in the storage.Type: ApplicationFiled: March 10, 2011Publication date: January 3, 2013Applicant: FUJITSU TEN LIMITEDInventors: Ryoh Izumoto, Motoki Komiya, Yuichiro Shimizu, Yoshinori Shibachi
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Publication number: 20120221229Abstract: An idling stop apparatus is provided which can prevent a voltage of a battery from being lowered even when a microcomputer is reset. In an idling stop apparatus when a reset condition is established, reset information indicating that the reset condition is established is stored in a latch circuit and a microcomputer disables an idling stop function when the reset information is stored. The reset information is stored in the latch circuit even when the microcomputer is being reset or even after the microcomputer is reset. Accordingly, the microcomputer after the reset can disable the idling stop function. As a result, it is possible to prevent the voltage of the battery from being lowered due to the idling stop function.Type: ApplicationFiled: September 17, 2010Publication date: August 30, 2012Applicant: FUJITSU TEN LIMITEDInventors: Ryoh Izumoto, Motoki Komiya, Yuichiro Shimizu, Yoshinori Shibachi
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Publication number: 20120153638Abstract: Engine control device includes a delay unit which delays or cuts off a flow of current from a first current system, which directs current to a coil, to a second current system, which directs current to a starter motor. When a starter switch, which turns the flow of current from the power source to the first current system on or off, is turned on and electricity flows to the first current system, the delay unit delays the current flowing from the first current system to the second current system. When electricity flows to the first current system as a result of a controller having turned a first switch on, the delay unit cuts off the flow of electricity from the first current system to the second current system.Type: ApplicationFiled: August 24, 2010Publication date: June 21, 2012Applicant: FUJITSU TEN LIMITEDInventors: Yuichiro Shimizu, Yoshinori Shibachi, Ryoh Izumoto, Motoki Komiya
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Publication number: 20110224890Abstract: An idling stop device is mounted on a vehicle and automatically stops and starts an engine of the vehicle. A microcomputer has an idling stop function of automatically stopping the engine when a predetermined stop condition is established and automatically starting the engine when a predetermined start condition is established during the stopping of the engine. A detecting unit detects that a power voltage of the microcomputer, which is obtained by dropping a voltage of a battery of the vehicle is lower than a minimum operating voltage of the microcomputer. A storage unit stores voltage reduction information irrespective of a state of the microcomputer if the power voltage is lower than the minimum operating voltage. A power control unit causes a capacitor which stores electric charges corresponding to power for driving a starter motor of the engine to supply power to the starter motor when the engine is started, if the voltage reduction information is stored in the storage unit.Type: ApplicationFiled: March 14, 2011Publication date: September 15, 2011Applicant: FUJITSU TEN LIMITEDInventors: Ryoh IZUMOTO, Motoki KOMIYA, Yuuichiroh SHIMIZU, Yoshinori SHIBACHI
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Publication number: 20110208410Abstract: An idling stop device is mounted on a vehicle. A microcomputer has an idling stop function of automatically stopping an engine of the vehicle when a predetermined stop condition is established and automatically starting the engine when a predetermined start condition is established during the stopping of the engine. A detecting unit detects that a power voltage of the microcomputer, which is obtained by dropping a voltage of a battery of the vehicle is lower than a minimal operation voltage of the microcomputer. A storage unit stores voltage decrease information irrespective of a state of the microcomputer if the power voltage is lower than the minimal operation voltage. A power control unit stops supply of power to some of electrical loads to which power is supplied from the battery when the engine is started, if the voltage decrease information is stored in the storage unit.Type: ApplicationFiled: February 22, 2011Publication date: August 25, 2011Applicant: FUJITSU TEN LIMITEDInventors: Ryoh IZUMOTO, Motoki KOMIYA, Yuuichiroh SHIMIZU, Yoshinori SHIBACHI