Patents by Inventor Naoki Kanno
Naoki Kanno 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: 9676575Abstract: The image forming apparatus includes a plate movable up and down, a control cam that moves the plate up and down, a stepping motor that derives the control cam, a sheet feeding roller that contacts the sheet on the plate moved up by the control cam to feed the sheet held in contact with the feeding unit through rotation caused by drive from the stepping motor, and a control unit that controls the stepping motor. The control unit rotates the stepping motor at a first speed so that the control cam moves the plate up. After the sheet feeding roller is rotated, when the sheet feeding roller is stopped to stop the stepping motor, the control unit changes the rotational speed of the stepping motor from the first speed to a second speed.Type: GrantFiled: February 20, 2015Date of Patent: June 13, 2017Assignee: Canon Kabushiki KaishaInventors: Masayuki Sakai, Naoki Kanno
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Patent number: 9454120Abstract: Provided is an image forming apparatus for driving a cassette pickup roller (17) and a registration roller (18) by using the same driving source, in which a conveyance control portion (221) starts conveyance speed control for a subsequent sheet, which is fed from a sheet feeding position subsequently to a preceding sheet fed therefrom earlier, when it is determined that a trailing edge of the preceding sheet has passed through the registration roller (18).Type: GrantFiled: October 8, 2015Date of Patent: September 27, 2016Assignee: Canon Kabushiki KaishaInventors: Naoki Kanno, Tadashi Fukumuro
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Publication number: 20160252843Abstract: A plurality of development units includes at least a first development unit and a second development unit, and a plurality of photosensitive members includes at least a first photosensitive member corresponding to the first development unit and a second photosensitive member corresponding to the second development unit. After shifting the first development unit and the first photosensitive member into a contact state and shifting the second development state and the second photosensitive member into a contact state, a control unit controls a timing at which the first development unit develops an electrostatic latent image, based on a contact timing at which the second development unit and the second photosensitive member are shifted into a contact state.Type: ApplicationFiled: February 22, 2016Publication date: September 1, 2016Inventor: Naoki Kanno
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Patent number: 9429884Abstract: A control unit changes the polarity of a potential of an intermediate transfer member in a primary transfer portion by changing the polarity of voltage to be applied to a secondary transfer member, and applies first voltage in a first step of forming an image on a recording material by transferring a toner image. A detection device detects the presence/absence of the recording material at a timing when a rear end of the toner image reaches a second position which is upstream of a secondary transfer portion on a conveyance path of the toner image. The control unit determines a timing to switch the voltage to be applied to the secondary transfer member from the first voltage to second voltage having polarity opposite to that of the first voltage, based on the detection result by the detection device.Type: GrantFiled: November 20, 2015Date of Patent: August 30, 2016Assignee: Canon Kabushiki KaishaInventor: Naoki Kanno
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Publication number: 20160147183Abstract: A control unit changes the polarity of a potential of an intermediate transfer member in a primary transfer portion by changing the polarity of voltage to be applied to a secondary transfer member, and applies first voltage in a first step of forming an image on a recording material by transferring a toner image. A detection device detects the presence/absence of the recording material at a timing when a rear end of the toner image reaches a second position which is upstream of a secondary transfer portion on a conveyance path of the toner image. The control unit determines a timing to switch the voltage to be applied to the secondary transfer member from the first voltage to second voltage having polarity opposite to that of the first voltage, based on the detection result by the detection device.Type: ApplicationFiled: November 20, 2015Publication date: May 26, 2016Inventor: Naoki Kanno
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Patent number: 9280098Abstract: An image forming apparatus includes a switching unit that can switch polarities of potentials of an intermediate transfer member generated at a primary transfer part and a secondary transfer part in synchronization, and a control unit that executes adjustment processing in which a potential having a polarity opposite to the polarity upon the transfer is generated at least one of the primary transfer part and the secondary transfer part, in which the control unit controls the switching unit in a manner that, in a case where the adjustment processing is performed in a course of continuous image formation on a plurality of transfer materials conveyed to the secondary transfer part, a timing for generating the potential having the opposite polarity corresponds to a timing at which toner images are not transferred at both of the primary transfer part and the secondary transfer part.Type: GrantFiled: January 27, 2015Date of Patent: March 8, 2016Assignee: Canon Kabushiki KaishaInventor: Naoki Kanno
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Publication number: 20160033912Abstract: Provided is an image forming apparatus for driving a cassette pickup roller (17) and a registration roller (18) by using the same driving source, in which a conveyance control portion (221) starts conveyance speed control for a subsequent sheet, which is fed from a sheet feeding position subsequently to a preceding sheet fed therefrom earlier, when it is determined that a trailing edge of the preceding sheet has passed through the registration roller (18).Type: ApplicationFiled: October 8, 2015Publication date: February 4, 2016Inventors: Naoki Kanno, Tadashi Fukumuro
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Patent number: 9195196Abstract: Provided is an image forming apparatus for driving a cassette pickup roller (17) and a registration roller (18) by using the same driving source, in which a conveyance control portion (221) starts conveyance speed control for a subsequent sheet, which is fed from a sheet feeding position subsequently to a preceding sheet fed therefrom earlier, when it is determined that a trailing edge of the preceding sheet has passed through the registration roller (18).Type: GrantFiled: August 8, 2013Date of Patent: November 24, 2015Assignee: Canon Kabushiki KaishaInventors: Naoki Kanno, Tadashi Fukumuro
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Publication number: 20150246784Abstract: The image forming apparatus includes a plate movable up and down, a control cam that moves the plate up and down, a stepping motor that derives the control cam, a sheet feeding roller that contacts the sheet on the plate moved up by the control cam to feed the sheet held in contact with the feeding unit through rotation caused by drive from the stepping motor, and a control unit that controls the stepping motor. The control unit rotates the stepping motor at a first speed so that the control cam moves the plate up. After the sheet feeding roller is rotated, when the sheet feeding roller is stopped to stop the stepping motor, the control unit changes the rotational speed of the stepping motor from the first speed to a second speed.Type: ApplicationFiled: February 20, 2015Publication date: September 3, 2015Inventors: Masayuki Sakai, Naoki Kanno
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Publication number: 20150220042Abstract: The image forming apparatus includes a control unit for converting image information into an image signal and output the image signal with reference to a timing signal, a sheet feeding control unit for feeding a recording material, an image forming unit for forming the image on a photosensitive drum based on the image signal output from the control unit, a transmission unit for transmitting a length of the image corresponding to a length of an output period of the image signal, an automatic sheet length detection mechanism for acquiring a length of the recording material in a conveyance direction thereof, and an image control unit for controlling a time interval at which the timing signal is output based on the size of the image and the size of the recording material.Type: ApplicationFiled: January 26, 2015Publication date: August 6, 2015Inventor: Naoki Kanno
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Publication number: 20150212457Abstract: An image forming apparatus includes a switching unit that can switch polarities of potentials of an intermediate transfer member generated at a primary transfer part and a secondary transfer part in synchronization, and a control unit that executes adjustment processing in which a potential having a polarity opposite to the polarity upon the transfer is generated at least one of the primary transfer part and the secondary transfer part, in which the control unit controls the switching unit in a manner that, in a case where the adjustment processing is performed in a course of continuous image formation on a plurality of transfer materials conveyed to the secondary transfer part, a timing for generating the potential having the opposite polarity corresponds to a timing at which toner images are not transferred at both of the primary transfer part and the secondary transfer part.Type: ApplicationFiled: January 27, 2015Publication date: July 30, 2015Inventor: Naoki Kanno
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Publication number: 20140313422Abstract: A projection type video display includes a light source controller and a light amount detection sensor. The light source controller controls currents so as to sequentially turn off a plurality of LEDs forming each of LED arrays, detects a change in output light amount before and after each of the plurality of LEDs turn off by the light amount detection sensor to detect an abnormal turning-on of each of the LEDs, and performs control so as to interrupt a current supply to the LED in which an abnormal turning-on has been detected.Type: ApplicationFiled: December 4, 2013Publication date: October 23, 2014Applicant: Mitsubishi Electric CorporationInventors: Naoki KANNO, Shigenori SHIBUE
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Patent number: 8807760Abstract: The present invention is directed to provide a light source apparatus that includes space-saving LED cooling unit, and a projector type image display apparatus including the same. The light source apparatus of the present invention includes a plurality of LEDs, a plurality of heatsinks that are respectively thermally coupled to the LEDs and that are disposed in series with an interval between each other, and a cooler mechanism that sends a cooling airflow into the heatsinks along their disposition direction. A heatsink included in the plurality of heatsinks that dissipates the heat of an LED having a greater heat generating amount out of the plurality of LEDs is disposed downstream in the cooling airflow from the other heatsink.Type: GrantFiled: January 7, 2011Date of Patent: August 19, 2014Assignee: Mitsubishi Electric CorporationInventors: Naoki Kanno, Shigenori Shibue, Takuya Kodama, Shigetoshi Ipposhi
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Patent number: 8757818Abstract: Self-aligning mechanisms hold a condenser housing. The condenser housing is moved toward an integrator while tapered surfaces of the condenser housing of an LED light source unit are inserted along condenser lens guides of a projection unit. LED light source unit datum surfaces and datum surfaces of the projection unit abut against each other, and the tapered surfaces of the LED light source unit can no longer move toward the integrator along the condenser lens guides of the projection unit. In this state, the LED light source unit and the projection unit are coupled to each other.Type: GrantFiled: December 23, 2010Date of Patent: June 24, 2014Assignee: Mitsubishi Electric CorporationInventors: Naoki Kawamoto, Yoshinori Kakuta, Naoki Kanno, Kimito Nishikawa
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Publication number: 20140056630Abstract: Provided is an image forming apparatus for driving a cassette pickup roller (17) and a registration roller (18) by using the same driving source, in which a conveyance control portion (221) starts conveyance speed control for a subsequent sheet, which is fed from a sheet feeding position subsequently to a preceding sheet fed therefrom earlier, when it is determined that a trailing edge of the preceding sheet has passed through the registration roller (18).Type: ApplicationFiled: August 8, 2013Publication date: February 27, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Naoki Kanno, Tadashi Fukumuro
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Publication number: 20130214997Abstract: A multi-screen display apparatus includes image display apparatuses. A cooling device is thermally connected to semiconductor light sources that are respectively installed in image display apparatuses.Type: ApplicationFiled: December 12, 2012Publication date: August 22, 2013Inventor: Naoki KANNO
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Patent number: 8028831Abstract: A package structure prevents an optical sheet from being brought into contact with a display panel and making scratches on the display panel due to motion caused during transport of a display device, thereby minimizing cost increase. A package structure for a thin display device is the structure for storing the thin display device in a package case. The thin display device includes at least one optical sheet situated in approximately parallel with its display surface, and the package case includes a storage member for holding a thin display device with the optical sheet having a surface inclined relative to a vertical direction.Type: GrantFiled: May 9, 2008Date of Patent: October 4, 2011Assignee: Mitsubishi Electric CorporationInventors: Yoshinori Kakuta, Shigeru Takeuchi, Hirokazu Taguchi, Naoki Kanno, Kimito Nishikawa
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Publication number: 20110181839Abstract: Self-aligning mechanisms hold a condenser housing. The condenser housing is moved toward an integrator while tapered surfaces of the condenser housing of an LED light source unit are inserted along condenser lens guides of a projection unit. LED light source unit datum surfaces and datum surfaces of the projection unit abut against each other, and the tapered surfaces of the LED light source unit can no longer move toward the integrator along the condenser lens guides of the projection unit. In this state, the LED light source unit and the projection unit are coupled to each other.Type: ApplicationFiled: December 23, 2010Publication date: July 28, 2011Inventors: Naoki Kawamoto, Yoshinori Kakuta, Naoki Kanno, Kimito Nishikawa
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Publication number: 20110181842Abstract: The present invention is directed to provide a light source apparatus that includes space-saving LED cooling unit, and a projector type image display apparatus including the same. The light source apparatus of the present invention includes a plurality of LEDs, a plurality of heatsinks that are respectively thermally coupled to the LEDs and that are disposed in series with an interval between each other, and a cooler mechanism that sends a cooling airflow into the heatsinks along their disposition direction. A heatsink included in the plurality of heatsinks that dissipates the heat of an LED having a greater heat generating amount out of the plurality of LEDs is disposed downstream in the cooling airflow from the other heatsink.Type: ApplicationFiled: January 7, 2011Publication date: July 28, 2011Inventors: Naoki KANNO, Shigenori SHIBUE, Takuya KODAMA, Shigetoshi IPPOSHI
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Publication number: 20090065385Abstract: A package structure prevents an optical sheet from being brought into contact with a display panel and making scratches on the display panel due to motion caused during transport of a display device, thereby minimizing cost increase. A package structure for a thin display device is the structure for storing the thin display device in a package case. The thin display device includes at least one optical sheet situated in approximately parallel with its display surface, and the package case includes a storage member for holding a thin display device with the optical sheet having a surface inclined relative to a vertical direction.Type: ApplicationFiled: May 9, 2008Publication date: March 12, 2009Inventors: Yoshinori Kakuta, Shigeru Takeuchi, Hirokazu Taguchi, Naoki Kanno, Kimito Nishikawa