Patents by Inventor Hideaki Hasegawa
Hideaki Hasegawa 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: 9007292Abstract: A driver circuit for driving a display panel is formed on a substrate and is organized into two families of sections. Each section includes a logic circuit, a level shifter, a decoder, an operational amplifier, and an output pad. In the first family, each section is laid out in the stated sequence (logic circuit, level shifter, decoder, operational amplifier, output pad). In the second family, each section is laid out in a different sequence: output pad, operational amplifier, logic circuit, level shifter, decoder. The output pads in the two families of sections are located on opposite sides of the substrate, and every output pad is adjacent to the operational amplifier to which it is connected. This arrangement reduces signal-to-signal variations in the output characteristics of the driver circuit and improves the slew rate of the output signals.Type: GrantFiled: March 28, 2012Date of Patent: April 14, 2015Assignee: LAPIS Semiconductor Co., Ltd.Inventors: Junko Ikari, Hideaki Hasegawa
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Patent number: 9001174Abstract: The image forming apparatus includes a photosensitive drum and a light emitting device. In the rotational axis direction of the photosensitive drum, the width of the weak light exposure region on the photosensitive drum in which an exposing device emits weak light is larger than the width of a region corresponding to the width of a recording medium on which an image is formed, but smaller than the width of a region on the photosensitive drum charged by a charging roller.Type: GrantFiled: February 28, 2013Date of Patent: April 7, 2015Assignee: Canon Kabushiki KaishaInventors: Shinji Katagiri, Masaru Shimura, Hideo Nanataki, Shinsuke Kobayashi, Kiyoto Toyoizumi, Yasunari Watanabe, Hideaki Hasegawa
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Publication number: 20150085913Abstract: A data receiving circuit that can accurately obtain a data signal corresponding to information data from a high speed high density transmitted signal, and a semiconductor device including the data receiving circuit. The amplitude of a first differential signal corresponding to a level difference between a pair of received differential signals, generated in a first differential stage, is amplified and binalized to obtain a received data signal. A second differential signal corresponding to the level difference between the received differential signals, and a third differential signal which is a phase-inverted signal of the second differential signal are generated in a second differential stage provided separately, and a current corresponding to the second differential signal and a current corresponding to the third differential signal are discharged into the respective ones of the pair of transmission lines, thereby suppressing the amplitudes of the received differential signals.Type: ApplicationFiled: December 4, 2014Publication date: March 26, 2015Applicant: LAPIS SEMICONDUCTOR CO., LTD.Inventors: Hideaki HASEGAWA, Kouji TAKEDA
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Patent number: 8948665Abstract: A regulating member for regulating a developer amount carried on a developer carrying member includes a plate-like supporting member having an elasticity, the supporting member being provided with a fixed portion for being fixed to a fixed part; a first contact portion contactable to the developer carrying member, the first contact portion protruding from the regulating member from a side of the supporting member; and a second contact portion contactable to and the developer carrying member, the second contact portion being at a position closer to the fixed portion than the first contact portion.Type: GrantFiled: May 18, 2012Date of Patent: February 3, 2015Assignee: Canon Kabushiki KaishaInventors: Takashi Kase, Hideaki Hasegawa
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Patent number: 8929466Abstract: A data receiving circuit that can accurately obtain a data signal corresponding to information data from a high speed high density transmitted signal, and a semiconductor device including the data receiving circuit. The amplitude of a first differential signal corresponding to a level difference between a pair of received differential signals, generated in a first differential stage, is amplified and binalized to obtain a received data signal. A second differential signal corresponding to the level difference between the received differential signals, and a third differential signal which is a phase-inverted signal of the second differential signal are generated in a second differential stage provided separately, and a current corresponding to the second differential signal and a current corresponding to the third differential signal are discharged into the respective ones of the pair of transmission lines, thereby suppressing the amplitudes of the received differential signals.Type: GrantFiled: August 16, 2013Date of Patent: January 6, 2015Assignee: LAPIS Semiconductor Co., Ltd.Inventors: Hideaki Hasegawa, Kouji Tekeda
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Publication number: 20140341596Abstract: In a color image forming apparatus, the amount of light of an exposure unit for a weak exposure is changed according to a remaining service life of a photosensitive drum when the weak exposure is performed for the background area of a corresponding photosensitive drum by using the exposure unit.Type: ApplicationFiled: August 5, 2014Publication date: November 20, 2014Inventors: Masaru Shimura, Hideo Nanataki, Shinsuke Kobayashi, Shinji Katagiri, Yasunari Watanabe, Hideaki Hasegawa, Kiyoto Toyoizumi, Kouji Yasukawa
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Patent number: 8861659Abstract: A data receiving circuit and a data receiving method accurately acquire a data signal corresponding to information data from a high speed high density transmitted signal. An increase or a decrease of the level of one of a amplified data signal and a level converted data signal that is transmitted from one, referred to as one processing stage, of an amplification processing stage and a level converting processing stage, is fed back to a stage preceding the one processing stage. The amplification processing stage supplies, to a first line, an amplified data signal obtained by performing an amplification processing on a received data signal, and the level converting processing stage transmits, via a second line, a level converted data signal obtained by performing a level converting processing on the amplified data signal.Type: GrantFiled: February 28, 2013Date of Patent: October 14, 2014Assignee: Lapis Semiconductor Co., Ltd.Inventors: Hideaki Hasegawa, Kouji Takeda, Toshio Itou, Yuuichi Ike
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Patent number: 8837869Abstract: The invention of the present application provides an SOA-PLC hybrid integrated polarization diversity circuit including a PLC-PBS chip and an SOA-COS whose respective waveguides are coupled to each other. The PLC-PBS chip includes: first and second optical waveguides; a Mach-Zehnder interferometer circuit; and a half-wave plate placed in the first optical waveguide which TM mode light is split into. The SOA-COS includes: a third optical waveguide connected to the first optical waveguide; a fourth optical waveguide connected to the second optical waveguide; and an SOA formed in at least one of the third and fourth optical waveguides. One end of the third optical waveguide and one end of the fourth optical waveguide are connected to a U-turn optical waveguide, the one ends being not connected to the first optical waveguide and the second optical waveguide, respectively.Type: GrantFiled: January 7, 2013Date of Patent: September 16, 2014Assignee: Furukawa Electric Co., Ltd.Inventors: Takeshi Akutsu, Kazutaka Nara, Masaki Funabashi, Noriyuki Yokouchi, Hideaki Hasegawa
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Patent number: 8831444Abstract: In a color image forming apparatus, the amount of light of an exposure unit for a weak exposure is changed according to a remaining service life of a photosensitive drum when the weak exposure is performed for the background area of a corresponding photosensitive drum by using the exposure unit.Type: GrantFiled: March 7, 2012Date of Patent: September 9, 2014Assignee: Canon Kabushiki KaishaInventors: Masaru Shimura, Hideo Nanataki, Shinsuke Kobayashi, Shinji Katagiri, Yasunari Watanabe, Hideaki Hasegawa, Kiyoto Toyoizumi, Kouji Yasukawa
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Patent number: 8818215Abstract: An image forming apparatus includes image forming portions provided along a movement direction of a recording material conveying member or an intermediary transfer member and including a first portion and a second portion provided downstream of the first portion with respect to the movement direction; a detecting portion for detecting information on a developer deterioration state at the first portion; a storing portion for storing a relationship between a detection result of the detecting portion and an amount of the developer to be back-transferred at the second portion; and an outputting device for outputting a signal relating to an amount of the developer accommodated in the accommodating portion at the second portion on the basis of the detection result of the detecting portion, the relationship stored in the storing portion, and information on the developer used for image formation at each of the first and second portions.Type: GrantFiled: June 21, 2012Date of Patent: August 26, 2014Assignee: Canon Kabushiki KaishaInventors: Takayoshi Kihara, Hideaki Hasegawa
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Publication number: 20140178086Abstract: An image forming apparatus including: a photosensitive member; a charging device; an exposure device; and a developer carrying member, wherein, when it is assumed that an image forming area, a printing portion and a non-printing portion are an area on the photosensitive member on which an image to be transferred onto a recording material is formed, an area in the image forming area to which the developer adhere and an area in the image forming area to which the developer does not adhere, respectively, the exposure device exposes the printing portion at a first laser power, exposes the non-printing portion at a second laser power smaller than the first laser power, and exposes a non-image forming area on the photosensitive member between two adjacent image forming areas at no laser power or a third laser power smaller than the second laser power.Type: ApplicationFiled: December 17, 2013Publication date: June 26, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Takuya Kitamura, Hideaki Hasegawa, Shuichi Tetsuno
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Publication number: 20140169815Abstract: An image forming apparatus including: a plurality of image forming stations; and a control portion configured to control an image forming operation, each of the image forming stations includes: an image bearing member configured to form a toner image on a surface thereof; and a charging device configured to charge the image bearing member, wherein the toner images formed on the image bearing members of the image forming stations are sequentially transferred to a transfer incurring member to be superimposed, wherein the control portion sets a voltage applied to the charging device in forming an image in an image forming station which performs the transfer later based on image density information of the toner image transferred to the transfer incurring member by an image forming station which performs the transfer earlier in a sequence of the image forming operations.Type: ApplicationFiled: December 9, 2013Publication date: June 19, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Shuichi Tetsuno, Hideaki Hasegawa, Takuya Kitamura
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Publication number: 20140147139Abstract: An image forming apparatus including: photosensitive members; charging devices to which a common charging power source applies a charging voltage to charge the photosensitive members; an exposure device configured to expose the photosensitive members; developing devices to form developer images on the photosensitive members; a transfer device to transfer the developer images onto a transfer medium; and a control portion configured to set a lower limit value of the charging voltage for each photosensitive member, apply the charging voltage having a magnitude not less than any lower limit value from the charging power source to the charging devices, control the output of the laser power for each photosensitive member individually, and set, based on the image density of the developer image transferred onto the transfer medium earlier, the lower limit value for a photosensitive member on which a developer image to be transferred onto the transfer medium later is formed.Type: ApplicationFiled: November 20, 2013Publication date: May 29, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Hideaki Hasegawa, Takuya Kitamura, Shuichi Tetsuno
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Patent number: 8725021Abstract: An image forming apparatus includes an image bearing member for carrying a developed image, a developer carrying member for carrying a developer to be supplied to the image bearing member, a cleaning blade for removing the developer from the image bearing member, and a controller for executing, at predetermined timing during a non-image-formation period, sequence controls for moving developer to the image bearing member and removing developer from the image bearing member by the cleaning blade. In addition, a removing unit removes the developer at a position before the developer, moved to the image bearing member by the sequence control, reaches the cleaning blade. An amount of the developer removed by the cleaning blade is controlled to be smaller in a first sequence control than in a second sequence control.Type: GrantFiled: October 6, 2011Date of Patent: May 13, 2014Assignee: Canon Kabushiki KaishaInventors: Kohei Matsuda, Hideaki Hasegawa, Hirokazu Fujino
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Publication number: 20140078580Abstract: An optical amplifier device comprising an input/output section that inputs incident light and outputs emission light; a polarized light splitting section that causes a polarized light component of the incident light input from the input/output section to branch, and outputs first polarization mode light having a first polarization and second polarization mode light having a second polarization different from the first polarization; a polarization converting section that receives the first polarization mode light, converts the first polarization to the second polarization, and outputs first polarization converted light; and an optical amplifying section that amplifies the first polarization converted light input to one end of a waveguide, outputs the resulting amplified first polarization converted light from another end of the waveguide, amplifies the second polarization mode light input to the other end of the waveguide, and outputs the resulting amplified second polarization mode light from the one end of tType: ApplicationFiled: November 25, 2013Publication date: March 20, 2014Applicant: FURUKAWA ELECTRIC CO., LTDInventors: Hideaki HASEGAWA, Masaki FUNABASHI, Kazuaki KIYOTA, Takeshi AKUTSU, Noriyuki YOKOUCHI, Kazutaka NARA
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Publication number: 20140050285Abstract: A data receiving circuit that can accurately obtain a data signal corresponding to information data from a high speed high density transmitted signal, and a semiconductor device including the data receiving circuit. The amplitude of a first differential signal corresponding to a level difference between a pair of received differential signals, generated in a first differential stage, is amplified and binalized to obtain a received data signal. A second differential signal corresponding to the level difference between the received differential signals, and a third differential signal which is a phase-inverted signal of the second differential signal are generated in a second differential stage provided separately, and a current corresponding to the second differential signal and a current corresponding to the third differential signal are discharged into the respective ones of the pair of transmission lines, thereby suppressing the amplitudes of the received differential signals.Type: ApplicationFiled: August 16, 2013Publication date: February 20, 2014Applicant: LAPIS SEMICONDUCTOR CO., LTD.Inventors: Hideaki HASEGAWA, Kouji TEKEDA
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Publication number: 20140043221Abstract: A driving circuit includes a pair of operational amplifiers, one producing an analog voltage output of positive polarity, the other producing an analog voltage output of negative polarity. An output switching circuit interchanges these outputs between a pair of data lines. One or both of the operational amplifiers includes a parasitic diode having one terminal connected to the output terminal of the operational amplifier and another terminal normally connected to a power supply voltage of the operational amplifier. When the output of the operational amplifier is switched, a protective switching circuit temporarily disconnects the parasitic diode from the power supply of the operational amplifier and instead connects it to a power supply line carrying a voltage high enough, or low enough, to ensure that the parasitic diode is not forward biased by the existing voltage on the data line to which the output is switched.Type: ApplicationFiled: October 14, 2013Publication date: February 13, 2014Applicant: LAPIS SEMICONDUCTOR CO., LTD.Inventors: Hideaki Hasegawa, Atsushi Hirama, Koji Higuchi
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Patent number: 8625194Abstract: A semiconductor optical amplifier includes an input-side optical amplifier waveguide section that has a first active core layer. An output-side optical amplifier waveguide section connects to the input-side optical amplifier waveguide section and has a second active core layer that is wider than the first active core layer. The width of the first active core layer and relative refractive index difference between the first active core layer and adjacent clad section in the width direction of the first active core layer, and the width of the second active core layer and relative refractive index difference between the second active core layer and adjacent clad section in the width direction of the second active core layer are set such that the carrier density and optical confinement factor in the first active core layer are higher than the carrier density and optical confinement factor in the second active core layer.Type: GrantFiled: May 15, 2012Date of Patent: January 7, 2014Assignee: Furukawa Electric Co., Ltd.Inventor: Hideaki Hasegawa
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Publication number: 20140002977Abstract: Some embodiments of the present invention include a portable tablet folio stand that is designed for use in multiple modes. The stand can allow a user to view the tablet from multiple angles, such as a movie viewing angle and a working angle. In the movie viewing angle, the tablet is optimally positioned for viewing the tablet screen, for instance to watch videos. In the working angle, the tablet is optimally positioned for performing tasks such as typing on the tablet. In some embodiments, the tablet stand can be configured to be portable and detachably coupled to a keyboard.Type: ApplicationFiled: June 29, 2012Publication date: January 2, 2014Inventors: Hiroyuki Noguchi, Eiji Shinohara, Hideaki Hasegawa, Hisashi Shima, Tomoyuki Takahashi, Aaron Michael Stewart
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Publication number: 20130308969Abstract: An image forming apparatus includes photosensitive drums, charging devices, an exposure unit configured to expose surfaces of photosensitive drums to generate a non-image portion potential and expose the surfaces to generate an image portion potential, developing members configured to make a developer adhere to an area where the image portion potential is generated to form a developer image on the photosensitive drums, a control unit configured to control an intensity of the charging voltage, and an acquisition unit configured to acquire thicknesses of photosensitive layers of the respective plurality of photosensitive drums, wherein the control unit is configured to set the intensity of a charging voltage applied to the common charging devices according to a maximum thickness among the thicknesses acquired by the acquisition unit, and individually control the output of the first laser power for the photosensitive drum according to surface potentials of the charged photosensitive drums.Type: ApplicationFiled: May 15, 2013Publication date: November 21, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Hideaki Hasegawa, Motoki Adachi, Takayoshi Kihara