Patents by Inventor Masahiro Koiwai
Masahiro Koiwai 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: 11383513Abstract: In a liquid discharging apparatus, a head control unit, which controls an operation of a head unit, includes a first conversion circuit that converts an image signal input from an outside into a first electric signal, a first photoelectric conversion circuit that converts the first electric signal into an optical signal, the head unit, which discharges a liquid, includes a second photoelectric conversion circuit that converts the optical signal into a second electric signal, a second conversion circuit that converts the second electric signal into a discharge control signal for controlling discharge of a liquid. The first conversion circuit performs a first conversion process of converting the image signal into the first electric signal without depending on a discharge information, and the second conversion circuit performs a second conversion process of converting the second electric signal into the discharge control signal by using the discharge information.Type: GrantFiled: January 23, 2020Date of Patent: July 12, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Kamijima, Masahiro Koiwai
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Publication number: 20200238687Abstract: In a liquid discharging apparatus, a head control unit, which controls an operation of a head unit, includes a first conversion circuit that converts an image signal input from an outside into a first electric signal, a first photoelectric conversion circuit that converts the first electric signal into an optical signal, the head unit, which discharges a liquid, includes a second photoelectric conversion circuit that converts the optical signal into a second electric signal, a second conversion circuit that converts the second electric signal into a discharge control signal for controlling discharge of a liquid. The first conversion circuit performs a first conversion process of converting the image signal into the first electric signal without depending on a discharge information, and the second conversion circuit performs a second conversion process of converting the second electric signal into the discharge control signal by using the discharge information.Type: ApplicationFiled: January 23, 2020Publication date: July 30, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Masayuki KAMIJIMA, Masahiro KOIWAI
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Patent number: 10009498Abstract: A printing apparatus to which a remote terminal is connectable via a communication line such as the Internet includes a communication interface configured to perform data communication with the remote terminal, and a communication module configured to control the communication interface. At a power supply restart after a power shutdown state, the communication module transmits information of the power supply restart to the remote terminal.Type: GrantFiled: November 2, 2016Date of Patent: June 26, 2018Assignee: Seiko Epson CorporationInventor: Masahiro Koiwai
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Publication number: 20170142280Abstract: A printing apparatus to which a remote terminal is connectable via a communication line such as the Internet includes a communication interface configured to perform data communication with the remote terminal, and a communication module configured to control the communication interface. At a power supply restart after a power shutdown state, the communication module transmits information of the power supply restart to the remote terminal.Type: ApplicationFiled: November 2, 2016Publication date: May 18, 2017Inventor: Masahiro Koiwai
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Publication number: 20070263250Abstract: An electronic control device that operates at a set operation clock frequency includes a power supply device connector that allows connection with a power supply device so that electric power is received from the power supply device; a power supply device information acquisition unit that acquires via the power supply device connector from the power supply device information on the maximum power supplied from the power supply device; one or more electric device connectors that allow connection with one or more electric devices, which are different from the power supply device, so that electric power is output to the one or more electric devices; an electric device information acquisition unit that acquires via the one or more electric device connectors from the one or more electric devices information on the maximum power consumptions of the one or more electric devices; and an operation clock frequency setting unit that sets an operation clock frequency of the electronic control device on the basis of the maType: ApplicationFiled: May 15, 2007Publication date: November 15, 2007Applicant: Seiko Epson CorporationInventor: Masahiro KOIWAI
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Patent number: 5255986Abstract: Picture image forming apparatus is made up of a main controller 70 which forms picture image data based on the data sent from an external host computer and a mechanism controller 80 for controlling mechanical members adapted to execute a printing sequence. The mechanism controller 80 issues information presenting timing of a printing sequence, for example, paper feed start time, printing ready time, and a paper discharge completion time, and informs the information to the main controller 70. The main controller 70 can supervise the printing sequence based on the received information without provided with a timer that supervises the printing sequence.Type: GrantFiled: December 16, 1991Date of Patent: October 26, 1993Assignee: Seiko Epson CorporationInventor: Masahiro Koiwai
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Patent number: 5086309Abstract: A page printer and system including a page printer. The page printer and each paper handling accessory device within the system includes a control unit. The control unit of the printer includes a main control unit and an auxiliary control unit. The main control unit supplies at least recording format data associated with the recording format of the recording data to the auxiliary control unit. The main control unit also inspects the specifications of each accessary device which have been previously stored in the auxiliary control unit to place the system in a standby state prior to receiving instructions to begin printing. The auxiliary control unit stores the specifications associated with each optional device and the recording format data and controls the operation of the page printer and each accessary device.Type: GrantFiled: July 2, 1990Date of Patent: February 4, 1992Assignee: Seiko Epson CorporationInventors: Kazuhiko Iida, Masahiro Koiwai
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Patent number: 5083170Abstract: An electrophotographic recording apparatus comprising these units which are arranged vertically: a sheet feeder for feeding a sheet of recording paper to a sheet feed inlet; an image forming unit for forming a printing image onto a photosensitive drum based on printing data and transferring the printing image onto the sheet; and a fixing unit for fixing the transferred image on the sheet. The apparatus further comprises a sheet switching guide mechanism by which the head end of the sheet is switched to both upper and lower directions. When the sheet switching guide mechanism is set to the upper direction, the printed sheet is forwarded by a sheet guide member to thereby pass through the printing path the sheet has already been through with the rear side of the sheet being the front, and the printing data is written from the last line during this process.Type: GrantFiled: April 16, 1990Date of Patent: January 21, 1992Assignee: Seiko Epson CorporationInventors: Shigeru Sawada, Mitsuaki Maruyama, Kenji Sawada, Hitoshi Nakagawa, Jun Tsujimoto, Shinichi Kasai, Masahiko Takeshita, Satoshi Kaneta, Masahiro Koiwai, Hiroshi Niki