Patents by Inventor Hisao Okita
Hisao Okita 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: 11679585Abstract: A printing apparatus that performs printing by using a print head includes a first power supply, a second power supply, and a control unit. The first power supply supplies a first voltage to the print head through a first supply line. The second power supply supplies a second voltage to the print head through a second supply line. The control unit supplies the first voltage from the first power supply without supplying a voltage from the second power supply at the time of an inspection of the print head, and executes a process action concerning a current leakage when a voltage exceeding a predetermined first threshold is generated on the second supply line.Type: GrantFiled: January 6, 2021Date of Patent: June 20, 2023Assignee: Canon Kabushiki KaishaInventors: Kohei Ogi, Hisao Okita
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Publication number: 20210154992Abstract: A printing apparatus that performs printing by using a print head includes a first power supply, a second power supply, and a control unit. The first power supply supplies a first voltage to the print head through a first supply line. The second power supply supplies a second voltage to the print head through a second supply line. The control unit supplies the first voltage from the first power supply without supplying a voltage from the second power supply at the time of an inspection of the print head, and executes a process action concerning a current leakage when a voltage exceeding a predetermined first threshold is generated on the second supply line.Type: ApplicationFiled: January 6, 2021Publication date: May 27, 2021Inventors: Kohei Ogi, Hisao Okita
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Publication number: 20210129041Abstract: The abstract of the disclosure is a thermal-ultrafine bubble generation unit which is configured to generate thermal-ultrafine bubbles by bringing a liquid into film boiling. More specifically, the thermal-ultrafine bubble generation unit in the disclosure includes a temperature detection element that is configured to detect generation of the film boiling.Type: ApplicationFiled: October 30, 2020Publication date: May 6, 2021Inventors: Yoshiyuki Imanaka, Takahiro Nakayama, Masahiko Kubota, Akira Yamamoto, Akitoshi Yamada, Yumi Yanai, Hiroyuki Ishinaga, Teruo Ozaki, Toshio Kashino, Hiroki Arai, Kazuki Hirobe, Yukinori Nishikawa, Hisao Okita, Yusuke Komano
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Patent number: 10913266Abstract: A printing apparatus that performs printing by using a print head includes a first power supply, a second power supply, and a control unit. The first power supply supplies a first voltage to the print head through a first supply line. The second power supply supplies a second voltage to the print head through a second supply line. The control unit supplies the first voltage from the first power supply without supplying a voltage from the second power supply at the time of an inspection of the print head, and executes a process action concerning a current leakage when a voltage exceeding a predetermined first threshold is generated on the second supply line.Type: GrantFiled: March 28, 2019Date of Patent: February 9, 2021Assignee: Canon Kabushiki KaishaInventors: Kohei Ogi, Hisao Okita
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Publication number: 20190299593Abstract: A printing apparatus that performs printing by using a print head includes a first power supply, a second power supply, and a control unit. The first power supply supplies a first voltage to the print head through a first supply line. The second power supply supplies a second voltage to the print head through a second supply line. The control unit supplies the first voltage from the first power supply without supplying a voltage from the second power supply at the time of an inspection of the print head, and executes a process action concerning a current leakage when a voltage exceeding a predetermined first threshold is generated on the second supply line.Type: ApplicationFiled: March 28, 2019Publication date: October 3, 2019Inventors: Kohei Ogi, Hisao Okita
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Patent number: 10245862Abstract: A power supply apparatus includes a power source unit configured to supply electric power to an electric load, a capacitor connected to a power supply line extending from the power supply unit to the electric load, a charge circuit configured to charge the capacitor while restricting a current value of the electric power supplied from the power source unit, a specifying unit configured to specify a voltage value of the capacitor, a first determination unit configured to determine whether the charge of the capacitor is completed in accordance with the voltage specified by the specifying unit, and a second determination unit configured to determine whether the voltage specified by the specifying unit is equal to or smaller than an error threshold value after the first determination unit determines that the charge of the capacitor is completed.Type: GrantFiled: May 23, 2016Date of Patent: April 2, 2019Assignee: Canon Kabushiki KaishaInventors: Yasufumi Ogasawara, Takashi Sakai, Hisao Okita, Shinya Ishikawa, Toru Oshika
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Patent number: 9868282Abstract: A control apparatus including a power supply unit configured to supply electric power, comprises: a capacitor connected to a power supply line extending from the power supply unit to a printhead; a discharge circuit configured to release charge stored in the capacitor; and a control unit configured to control a current value during a discharge operation by the discharge circuit, such that the current value increases as a voltage value of the capacitor decreases.Type: GrantFiled: May 12, 2016Date of Patent: January 16, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Shinya Ishikawa, Yasufumi Ogasawara, Hisao Okita, Takashi Sakai, Toru Oshika
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Patent number: 9862216Abstract: A power supply apparatus includes a power source unit supplying power to an electric load through a power supply line, a capacitor connected to the power supply line, a charge circuit charging the capacitor while restricting a current value of the power supplied from the power source unit, a detection unit detecting a voltage value of the capacitor, a controller which switches, after the charge of the capacitor is completed, a current value of the charge circuit to a first current value smaller than a current value supplied before the charge of the capacitor is completed, a first determination unit determining whether a first condition is satisfied based on the voltage value detected by the detection unit after the charge of the capacitor is completed, and a second determination unit determining whether an error process is to be performed based on a determination result of the first determination unit.Type: GrantFiled: May 24, 2016Date of Patent: January 9, 2018Assignee: Canon Kabushiki KaishaInventors: Hisao Okita, Yasufumi Ogasawara, Takashi Sakai, Toru Oshika, Shinya Ishikawa
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Publication number: 20160347103Abstract: A power supply apparatus includes a power source unit supplying power to an electric load through a power supply line, a capacitor connected to the power supply line, a charge circuit charging the capacitor while restricting a current value of the power supplied from the power source unit, a detection unit detecting a voltage value of the capacitor, a controller which switches, after the charge of the capacitor is completed, a current value of the charge circuit to a first current value smaller than a current value supplied before the charge of the capacitor is completed, a first determination unit determining whether a first condition is satisfied based on the voltage value detected by the detection unit after the charge of the capacitor is completed, and a second determination unit determining whether an error process is to be performed based on a determination result of the first determination unit.Type: ApplicationFiled: May 24, 2016Publication date: December 1, 2016Inventors: Hisao Okita, Yasufumi Ogasawara, Takashi Sakai, Toru Oshika, Shinya Ishikawa
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Publication number: 20160347059Abstract: A control apparatus including a power supply unit configured to supply electric power, comprises: a capacitor connected to a power supply line extending from the power supply unit to a printhead; a discharge circuit configured to release charge stored in the capacitor; and a control unit configured to control a current value during a discharge operation by the discharge circuit, such that the current value increases as a voltage value of the capacitor decreases.Type: ApplicationFiled: May 12, 2016Publication date: December 1, 2016Inventors: Shinya Ishikawa, Yasufumi Ogasawara, Hisao Okita, Takashi Sakai, Toru Oshika
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Publication number: 20160347097Abstract: A power supply apparatus includes a power source unit configured to supply electric power to an electric load, a capacitor connected to a power supply line extending from the power supply unit to the electric load, a charge circuit configured to charge the capacitor while restricting a current value of the electric power supplied from the power source unit, a specifying unit configured to specify a voltage value of the capacitor, a first determination unit configured to determine whether the charge of the capacitor is completed in accordance with the voltage specified by the specifying unit, and a second determination unit configured to determine whether the voltage specified by the specifying unit is equal to or smaller than an error threshold value after the first determination unit determines that the charge of the capacitor is completed.Type: ApplicationFiled: May 23, 2016Publication date: December 1, 2016Inventors: Yasufumi Ogasawara, Takashi Sakai, Hisao Okita, Shinya Ishikawa, Toru Oshika
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Patent number: 6657748Abstract: In an image reading apparatus, required capacity of a memory for storing shading correction data is reduced, as well as the width of a standard white board for generating the shading correction data is shortened. These are achieved by sequentially generating the shading correction data corresponding to respective R, G and B components, independently, to share a data storage area necessary for generating shading correction data, further, by reversing a scanning direction when scanning a standard white board while illuminating it with light of the respective color components on generating the shading correction data.Type: GrantFiled: May 25, 1999Date of Patent: December 2, 2003Assignee: Canon Kabushiki KaishaInventors: Hisao Okita, Mitsuru Amimoto, Takashi Sakai, Kimihiko Fukawa
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Patent number: 5825512Abstract: An image reading method for photo-electrically reading a document sheet image by a reader by relatively moving the document sheet and the reader comprises a first movement step for relatively moving the document sheet and the reader at a first speed to read an image of the document sheet, and a second movement step for relatively moving the document sheet and the reader at a second speed lower than the first speed for the interruption of the reading before the completion of the reading of the image of the document sheet. Also provided is a stop step for stopping the relative movement at the second speed of the document sheet and the reader.Type: GrantFiled: January 31, 1995Date of Patent: October 20, 1998Assignee: Canon Kabushiki KaishaInventor: Hisao Okita