Patents by Inventor Yasuhiko Okuma
Yasuhiko Okuma 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: 11841639Abstract: An image forming apparatus includes a toner container, a first conveyance unit, and an apparatus main body. The apparatus main body includes a photosensitive drum, a development roller, a second conveyance unit, a toner conveyance passage, light sensor, an acquisition unit, and a control unit configured to execute an abnormality detection mode. In an abnormality detection mode, the acquisition unit acquires a first acquired value after the driving of the second conveyance unit with the driving of the first conveyance unit stopped. When the first acquired value satisfies a first condition, the acquisition unit further acquires a second acquired value after the driving of the second conveyance unit with the driving of the first conveyance unit stopped. The apparatus main body further includes a notification unit to make notification of the abnormality when the second acquired value satisfies a second condition.Type: GrantFiled: May 24, 2022Date of Patent: December 12, 2023Assignee: Canon Kabushiki KaishaInventor: Yasuhiko Okuma
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Patent number: 11792347Abstract: An electronic apparatus includes a power source, a power monitoring unit configured to monitor an output voltage output from the power source, an acceptance unit configured to accept a user operation to turn off the electronic apparatus, and an execution unit configured to operate using power output from the power source, execute shutdown processing in response to the user operation accepted through the acceptance unit, and execute the shutdown processing when the output voltage monitored by the power monitoring unit is lower than a threshold voltage. The threshold voltage is higher than a guaranteed operation voltage of the execution unit.Type: GrantFiled: March 3, 2023Date of Patent: October 17, 2023Assignee: Canon Kabushiki KaishaInventor: Yasuhiko Okuma
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Publication number: 20230208996Abstract: An electronic apparatus includes a power source, a power monitoring unit configured to monitor an output voltage output from the power source, an acceptance unit configured to accept a user operation to turn off the electronic apparatus, and an execution unit configured to operate using power output from the power source, execute shutdown processing in response to the user operation accepted through the acceptance unit, and execute the shutdown processing when the output voltage monitored by the power monitoring unit is lower than a threshold voltage. The threshold voltage is higher than a guaranteed operation voltage of the execution unit.Type: ApplicationFiled: March 3, 2023Publication date: June 29, 2023Inventor: Yasuhiko Okuma
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Patent number: 11622058Abstract: An electronic apparatus includes a power source, a power monitoring unit configured to monitor an output voltage output from the power source, an acceptance unit configured to accept a user operation to turn off the electronic apparatus, and an execution unit configured to operate using power output from the power source, execute shutdown processing in response to the user operation accepted through the acceptance unit, and execute the shutdown processing when the output voltage monitored by the power monitoring unit is lower than a threshold voltage. The threshold voltage is higher than a guaranteed operation voltage of the execution unit.Type: GrantFiled: April 8, 2020Date of Patent: April 4, 2023Assignee: Canon Kabushiki KaishaInventor: Yasuhiko Okuma
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Publication number: 20220382184Abstract: An image forming apparatus includes a toner container, a first conveyance unit, and an apparatus main body. The apparatus main body includes a photosensitive drum, a development roller, a second conveyance unit, a toner conveyance passage, light sensor, an acquisition unit, and a control unit configured to execute an abnormality detection mode. In an abnormality detection mode, the acquisition unit acquires a first acquired value after the driving of the second conveyance unit with the driving of the first conveyance unit stopped. When the first acquired value satisfies a first condition, the acquisition unit further acquires a second acquired value after the driving of the second conveyance unit with the driving of the first conveyance unit stopped. The apparatus main body further includes a notification unit to make notification of the abnormality when the second acquired value satisfies a second condition.Type: ApplicationFiled: May 24, 2022Publication date: December 1, 2022Inventor: Yasuhiko Okuma
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Patent number: 11198574Abstract: According to the present disclosure, a first guide unit is provided with a first opening portion through which light in an optical path connecting a first optical element unit and a second optical element unit passes, a second guide unit is provided with a second opening portion through which light in the optical path connecting the first optical element unit and the second optical element unit passes, the first guide unit is provided with a duct for sending air to the first optical element unit, and the air coming out from the first opening portion hits the second optical element unit via the second opening portion.Type: GrantFiled: April 12, 2019Date of Patent: December 14, 2021Assignee: Canon Kabushiki KaishaInventors: Takafumi Suzuki, Yasuhiko Okuma, Yusuke Jota
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Patent number: 10999462Abstract: An information processing apparatus including a push switch turns off a power supply state of a main body and starts shutdown processing when a first user's operation is performed on the push switch in a normal state of the apparatus. When a second user's operation is performed on the push switch during the shutdown processing, the power supply state of the main body is switched between on and off. If the power supply state of the main body is the on state when the shutdown processing is completed, first processing for restarting the main body is performed, and if the power supply state of the main body is the off state when the shutdown processing is completed, second processing for stopping power supply to the main body is performed.Type: GrantFiled: May 10, 2019Date of Patent: May 4, 2021Assignee: CANON KABUSHIKIKAISHAInventors: Yasuhiko Okuma, Takahiro Haraguchi, Ryotaro Okuzono
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Patent number: 10866555Abstract: An emitter emits light such that the light crosses a conveyance path. A reflector reflects the light. A receiver receives reflected light. A determiner determines that a sheet is present on the basis of an amount of reflected light. A controller may increase a light amount of the light-emitting unit from a first light amount to a second light amount on the basis of a temperature of the light-emitting unit and a reflectance of the reflecting member. The controller may increase a receiving gain of the receiver from a first gain to a second gain on the basis of a reflectance of the reflecting member.Type: GrantFiled: December 27, 2017Date of Patent: December 15, 2020Assignee: Canon Kabushiki KaishaInventors: Yasuhiko Okuma, Keisuke Nakano
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Publication number: 20200329167Abstract: An electronic apparatus includes a power source, a power monitoring unit configured to monitor an output voltage output from the power source, an acceptance unit configured to accept a user operation to turn off the electronic apparatus, and an execution unit configured to operate using power output from the power source, execute shutdown processing in response to the user operation accepted through the acceptance unit, and execute the shutdown processing when the output voltage monitored by the power monitoring unit is lower than a threshold voltage. The threshold voltage is higher than a guaranteed operation voltage of the execution unit.Type: ApplicationFiled: April 8, 2020Publication date: October 15, 2020Inventor: Yasuhiko Okuma
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Publication number: 20190356801Abstract: An information processing apparatus including a push switch turns off a power supply state of a main body and starts shutdown processing when a first user's operation is performed on the push switch in a normal state of the apparatus. When a second user's operation is performed on the push switch during the shutdown processing, the power supply state of the main body is switched between on and off. If the power supply state of the main body is the on state when the shutdown processing is completed, first processing for restarting the main body is performed, and if the power supply state of the main body is the off state when the shutdown processing is completed, second processing for stopping power supply to the main body is performed.Type: ApplicationFiled: May 10, 2019Publication date: November 21, 2019Inventors: Yasuhiko Okuma, Takahiro Haraguchi, Ryotaro Okuzono
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Publication number: 20190233233Abstract: According to the present disclosure, a first guide unit is provided with a first opening portion through which light in an optical path connecting a first optical element unit and a second optical element unit passes, a second guide unit is provided with a second opening portion through which light in the optical path connecting the first optical element unit and the second optical element unit passes, the first guide unit is provided with a duct for sending air to the first optical element unit, and the air coming out from the first opening portion hits the second optical element unit via the second opening portion.Type: ApplicationFiled: April 12, 2019Publication date: August 1, 2019Inventors: Takafumi Suzuki, Yasuhiko Okuma, Yusuke Jota
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Patent number: 10301130Abstract: According to the present disclosure, a first guide unit is provided with a first opening portion through which light in an optical path connecting a first optical element unit and a second optical element unit passes, a second guide unit is provided with a second opening portion through which light in the optical path connecting the first optical element unit and the second optical element unit passes, the first guide unit is provided with a duct for sending air to the first optical element unit, and the air coming out from the first opening portion hits the second optical element unit via the second opening portion.Type: GrantFiled: October 27, 2017Date of Patent: May 28, 2019Assignee: Canon Kabushiki KaishaInventors: Takafumi Suzuki, Yasuhiko Okuma, Yusuke Jota
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Publication number: 20180203402Abstract: An emitter emits light such that the light crosses a conveyance path. A reflector reflects the light. A receiver receives reflected light. A determiner determines that a sheet is present on the basis of an amount of reflected light. A controller may increase a light amount of the light-emitting unit from a first light amount to a second light amount on the basis of a temperature of the light-emitting unit and a reflectance of the reflecting member. The controller may increase a receiving gain of the receiver from a first gain to a second gain on the basis of a reflectance of the reflecting member.Type: ApplicationFiled: December 27, 2017Publication date: July 19, 2018Inventors: Yasuhiko Okuma, Keisuke Nakano
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Publication number: 20180118488Abstract: According to the present disclosure, a first guide unit is provided with a first opening portion through which light in an optical path connecting a first optical element unit and a second optical element unit passes, a second guide unit is provided with a second opening portion through which light in the optical path connecting the first optical element unit and the second optical element unit passes, the first guide unit is provided with a duct for sending air to the first optical element unit, and the air coming out from the first opening portion hits the second optical element unit via the second opening portion.Type: ApplicationFiled: October 27, 2017Publication date: May 3, 2018Inventors: Takafumi Suzuki, Yasuhiko Okuma, Yusuke Jota