Patents by Inventor Keisuke FUJISAWA
Keisuke FUJISAWA 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: 11976199Abstract: There is provided a novel halogenated zinc phthalocyanine pigment for a color filter, which can form a green color filter having excellent contrast and high luminance. A halogenated zinc phthalocyanine pigment for a color filter shows, in a Raman spectrum, a peak intensity of 3.0% or more at 716±2.2 cm?1 when a peak intensity at 650±10 cm?1 is regarded as 100%.Type: GrantFiled: April 28, 2020Date of Patent: May 7, 2024Assignee: DIC CORPORATIONInventors: Keisuke Sakamoto, Kentaro Oishi, Ryousuke Asami, Mayumi Tokuoka, Katsunori Shimada, Keisuke Fujisawa
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Publication number: 20240086077Abstract: According to one embodiment, a memory system includes a nonvolatile semiconductor storage device and a memory controller. The nonvolatile semiconductor storage device includes at least one memory device including a plurality of memory cells corresponding to a plurality of pages. The memory controller is configured to control the nonvolatile semiconductor storage device. The pages include a first page. The memory controller is configured to: read first data stored in the first page from the nonvolatile semiconductor storage device; correct a fail bit included in the read first data; generate first spare data including information on the fail bit corrected in the read first data; and store the first spare data in the nonvolatile semiconductor storage device.Type: ApplicationFiled: March 10, 2023Publication date: March 14, 2024Applicant: Kioxia CorporationInventors: Tomoya SANUKI, Toshio FUJISAWA, Keisuke NAKATSUKA
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Patent number: 11923325Abstract: A memory chip unit includes a pad electrode including first and second portions, and a memory cell array. A prober includes a probe card and a movement mechanism. The probe card includes a probe electrode to be in contact with the pad electrode, and a memory controller electrically coupled to the probe electrode and executes reading and writing on the memory cell array. The movement mechanism executes a first operation that brings the probe electrode into contact with the first portion and does not bring the probe electrode into contact with the second portion, and a second operation that does not bring the probe electrode into contact with the first portion and brings the probe electrode into contact with the second portion.Type: GrantFiled: March 15, 2022Date of Patent: March 5, 2024Assignee: Kioxia CorporationInventors: Yasuhito Yoshimizu, Takashi Fukushima, Tatsuro Hitomi, Arata Inoue, Masayuki Miura, Shinichi Kanno, Toshio Fujisawa, Keisuke Nakatsuka, Tomoya Sanuki
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Patent number: 11326103Abstract: To provide a liquid crystal display device that has a high off-response speed and a good balance between drive voltage and transmittance, is stable over time, and also has a high voltage holding ratio. A liquid crystal display device in which a liquid crystal layer containing a polymer network (A) and a liquid crystal composition (B) is disposed between two substrates having an electrode on at least one side thereof and having transparent properties on at least one side thereof, and the loss factor (tan ?) (loss modulus/storage modulus) of the liquid crystal layer calculated from the storage modulus (Pa) and the loss modulus (Pa) in a sinusoidal vibration measured with a rheometer at 25° C. and at a measurement frequency of 1 Hz ranges from 0.1 to 1.Type: GrantFiled: December 12, 2017Date of Patent: May 10, 2022Assignee: DIC CORPORATIONInventors: Hiroshi Hasebe, Toru Fujisawa, Yoshinori Iwashita, Fumiaki Kodera, Keisuke Fujisawa, Kenji Nakamura, Yuichi Satokawa
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Publication number: 20220002550Abstract: There is provided a novel halogenated zinc phthalocyanine pigment for a color filter, which can form a green color filter having excellent contrast and high luminance. A halogenated zinc phthalocyanine pigment for a color filter shows, in a Raman spectrum, a peak intensity of 3.0% or more at 716±2.2 cm?1 when a peak intensity at 650±10 cm?1 is regarded as 100%.Type: ApplicationFiled: April 28, 2020Publication date: January 6, 2022Applicant: DIC CorporationInventors: Keisuke Sakamoto, Kentaro Oishi, Ryousuke Asami, Mayumi Tokuoka, Katsunori Shimada, Keisuke Fujisawa
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Publication number: 20200354633Abstract: To provide a liquid crystal display device that has a high off-response speed and a good balance between drive voltage and transmittance, is stable over time, and also has a high voltage holding ratio. A liquid crystal display device in which a liquid crystal layer containing a polymer network (A) and a liquid crystal composition (B) is disposed between two substrates having an electrode on at least one side thereof and having transparent properties on at least one side thereof, and the loss factor (tan ?) (loss modulus/storage modulus) of the liquid crystal layer calculated from the storage modulus (Pa) and the loss modulus (Pa) in a sinusoidal vibration measured with a rheometer at 25° C. and at a measurement frequency of 1 Hz ranges from 0.1 to 1.Type: ApplicationFiled: December 12, 2017Publication date: November 12, 2020Applicant: DIC CorporationInventors: Hiroshi Hasebe, Toru Fujisawa, Yoshinori Iwashita, Fumiaki Kodera, Keisuke Fujisawa, Kenji Nakamura, Yuichi Satokawa
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Publication number: 20200309197Abstract: A torque limiter includes: a shaft; a first gear that includes a first teeth part with teeth on its surface on one side in a direction along the central axis; a second gear that includes a second teeth part with teeth on its surface on another side in the direction along the central axis, the second teeth part being configured to mesh with the first teeth part; and an elastic member configured to press one of the first and second gears against the other, and the first and the second teeth parts respectively have sine-waved portions where teeth surfaces of the first and the second teeth parts have a shape of a sine wave when viewed in a direction orthogonal to the central axis, the teeth surfaces of the first and the second teeth parts being configured to contact each other.Type: ApplicationFiled: February 7, 2020Publication date: October 1, 2020Inventors: Takahisa KITANAKA, Keisuke FUJISAWA
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Patent number: 9708535Abstract: An object of the present invention is to provide a photoalignment layer with a more reliable absorption anisotropy parameter as a photoalignment layer that allows for reduced AC image-sticking. Specifically, provided is a photoalignment layer, obtained by exposure to polarized UV radiation, that has a maximum ?A (=A1?A2, where A1 is the absorbance in a direction parallel to a vibration direction of the polarized UV radiation, and A2 is the absorbance in a direction parallel to the vibration direction of the polarized UV radiation) of 0.35 or more per micrometer of layer thickness in a range of 230 to 380 nm.Type: GrantFiled: May 26, 2015Date of Patent: July 18, 2017Assignee: DIC CORPORATIONInventors: Hiroshi Hasebe, Fumiaki Kodera, Masanao Takashima, Isa Nishiyama, Hiroyuki Itou, Yutaka Kadomoto, Kazuki Obi, Yoshitaka Saitou, Yuuichirou Tani, Keisuke Fujisawa
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Publication number: 20170088777Abstract: An object of the present invention is to provide a photoalignment layer with a more reliable absorption anisotropy parameter as a photoalignment layer that allows for reduced AC image-sticking. Specifically, provided is a photoalignment layer, obtained by exposure to polarized UV radiation, that has a maximum ?A (=A1?A2, where A1 is the absorbance in a direction parallel to a vibration direction of the polarized UV radiation, and A2 is the absorbance in a direction parallel to the vibration direction of the polarized UV radiation) of 0.35 or more per micrometer of layer thickness in a range of 230 to 380 nm.Type: ApplicationFiled: May 26, 2015Publication date: March 30, 2017Applicant: DIC CORPORATIONInventors: Hiroshi Hasebe, Fumiaki Kodera, Masanao Takashima, Isa Nishiyama, Hiroyuki Itou, Yutaka Kadomoto, Kazuki Obi, Yoshitaka Saitou, Yuuichirou Tani, Keisuke Fujisawa
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Patent number: 9097311Abstract: A geared motor reduces a speed of rotation of a DC motor with a gear train and outputs the rotation to the outside. The gear train includes a second gear including a cylindrical portion a third gear a first insertion portion that is inserted in the cylindrical portion the second gear. The second gear and the third gear are made of a resin material. A projecting-and-recessed portion is provided on an inner peripheral surface of the cylindrical portion of the second gear. The projecting-and-recessed portion extends continuously in a circumferential direction over the entire circumference of the inner peripheral surface of the cylindrical portion. Pressing portions are evenly arranged in the circumferential direction on an outer peripheral surface of the first insertion portion of the third gear. The pressing portions are configured enter recesses in the projecting-and-recessed portion and press wall surfaces of the recesses.Type: GrantFiled: December 5, 2013Date of Patent: August 4, 2015Assignee: NIDEC COPAL CORPORATIONInventor: Keisuke Fujisawa
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Publication number: 20140157926Abstract: A geared motor reduces a speed of rotation of a DC motor with a gear train and outputs the rotation to the outside. The gear train includes a second gear including a cylindrical portion a third gear a first insertion portion that is inserted in the cylindrical portion the second gear. The second gear and the third gear are made of a resin material. A projecting-and-recessed portion is provided on an inner peripheral surface of the cylindrical portion of the second gear. The projecting-and-recessed portion extends continuously in a circumferential direction over the entire circumference of the inner peripheral surface of the cylindrical portion. Pressing portions are evenly arranged in the circumferential direction on an outer peripheral surface of the first insertion portion of the third gear. The pressing portions are configured enter recesses in the projecting-and-recessed portion and press wall surfaces of the recesses.Type: ApplicationFiled: December 5, 2013Publication date: June 12, 2014Applicant: NIDEC COPAL CORPORATIONInventor: Keisuke FUJISAWA