Patents by Inventor Keiji Takizawa

Keiji Takizawa 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).

  • Publication number: 20240117955
    Abstract: A lighting device includes a light emitting module and an optical element including first and second liquid crystal cells. Each of the first and second liquid crystal cells includes first and second transparent electrodes extending in a first direction and third and fourth transparent electrodes extending in a second direction. The light emitting module includes a light source, a light guide plate including an end surface into which light emitted from the light source is incident and a first surface from which the light incident into the end surface is emitted, and a prism sheet disposed opposite to the first surface. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other. The first surface includes a plurality of first grooves extending in a third direction intersecting the first direction and the second direction.
    Type: Application
    Filed: November 22, 2023
    Publication date: April 11, 2024
    Inventors: Kojiro IKEDA, Takeo KOITO, Tae KUROKAWA, Keiji TAKIZAWA
  • Patent number: 11531396
    Abstract: According to one embodiment, a display device includes a display which emits display light, a retroreflective element which retroreflects incident light, an optical element including a lower surface opposing the display and the retroreflective element and an upper surface on an opposite side to the lower surface, which reflects part of the display light toward the retroreflective element and transmits reflection light retroreflected by the retroreflective element and a first blower mechanism which blows air to a side of the upper surface.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: December 20, 2022
    Assignee: Japan Display Inc.
    Inventors: Shuji Hayashi, Keiji Takizawa
  • Patent number: 11075560
    Abstract: A stator of a rotary electric machine comprises a stator core and a stator coil that is wound around the stator core. The stator coil includes a first segment coil, a second segment coil, and a first connecting member that has a first fitting recess portion at a first end of the first connecting member and a second fitting recess portion at a second end of the first connecting member, the first connecting member connecting the first segment coil and the second segment coil by fitting the first segment coil into the first fitting recess portion and by fitting the second segment coil into the second fitting recess portion.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: July 27, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masashi Matsumoto, Shingo Nagai, Yoshitomo Kawanishi, Keiji Takizawa, Keiichi Kaneshige, Masahiro Nishimura
  • Publication number: 20200371595
    Abstract: According to one embodiment, a display device includes a display which emits display light, a retroreflective element which retroreflects incident light, an optical element including a lower surface opposing the display and the retroreflective element and an upper surface on an opposite side to the lower surface, which reflects part of the display light toward the retroreflective element and transmits reflection light retroreflected by the retroreflective element and a first blower mechanism which blows air to a side of the upper surface.
    Type: Application
    Filed: August 13, 2020
    Publication date: November 26, 2020
    Applicant: Japan Display Inc.
    Inventors: Shuji HAYASHI, Keiji Takizawa
  • Patent number: 10782783
    Abstract: According to one embodiment, a display device includes a display which emits display light, a retroreflective element which retroreflects incident light, an optical element including a lower surface opposing the display and the retroreflective element and an upper surface on an opposite side to the lower surface, which reflects part of the display light toward the retroreflective element and transmits reflection light retroreflected by the retroreflective element and a first blower mechanism which blows air to a side of the upper surface.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: September 22, 2020
    Assignee: Japan Display Inc.
    Inventors: Shuji Hayashi, Keiji Takizawa
  • Publication number: 20190222087
    Abstract: A stator of a rotary electric machine comprises a stator core and a stator coil that is wound around the stator core. The stator coil includes a first segment coil, a second segment coil, and a first connecting member that has a first fitting recess portion at a first end of the first connecting member and a second fitting recess portion at a second end of the first connecting member, the first connecting member connecting the first segment coil and the second segment coil by fitting the first segment coil into the first fitting recess portion and by fitting the second segment coil into the second fitting recess portion.
    Type: Application
    Filed: January 9, 2019
    Publication date: July 18, 2019
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masashi Matsumoto, Shingo Nagai, Yoshitomo Kawanishi, Keiji Takizawa, Keiichi Kaneshige, Masahiro Nishimura
  • Patent number: 10061168
    Abstract: According to an aspect, a liquid crystal display device includes: a first substrate; a second substrate; a liquid crystal layer between the first and second substrates; pixels each including sub-pixels corresponding to different color areas; a first electrode in each sub-pixel; and a second electrode facing the first electrode. The first electrode includes an electrode base portion extending in a first direction; and a plurality of comb tooth portions extending in a second direction from the electrode base portion. A slit pitch of a sub-pixel in one color area and a slit pitch of a sub-pixel in the other color area of at least two color areas out of different color areas are different in size, each slit pitch corresponding to a gap between the comb tooth portions adjacent to each other.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: August 28, 2018
    Assignee: Japan Display Inc.
    Inventors: Toshiharu Matsushima, Keiji Takizawa, Toshinori Uehara
  • Publication number: 20180136730
    Abstract: According to one embodiment, a display device includes a display which emits display light, a retroreflective element which retroreflects incident light, an optical element including a lower surface opposing the display and the retroreflective element and an upper surface on an opposite side to the lower surface, which reflects part of the display light toward the retroreflective element and transmits reflection light retroreflected by the retroreflective element and a first blower mechanism which blows air to a side of the upper surface.
    Type: Application
    Filed: October 31, 2017
    Publication date: May 17, 2018
    Applicant: Japan Display Inc.
    Inventors: Shuji HAYASHI, Keiji TAKIZAWA
  • Publication number: 20180004050
    Abstract: According to an aspect, a liquid crystal display device includes: a first substrate; a second substrate; a liquid crystal layer between the first and second substrates; pixels each including sub-pixels corresponding to different color areas; a first electrode in each sub-pixel; and a second electrode facing the first electrode. The first electrode includes an electrode base portion extending in a first direction; and a plurality of comb tooth portions extending in a second direction from the electrode base portion. A slit pitch of a sub-pixel in one color area and a slit pitch of a sub-pixel in the other color area of at least two color areas out of different color areas are different in size, each slit pitch corresponding to a gap between the comb tooth portions adjacent to each other.
    Type: Application
    Filed: September 13, 2017
    Publication date: January 4, 2018
    Inventors: Toshiharu MATSUSHIMA, Keiji TAKIZAWA, Toshinori UEHARA
  • Patent number: 9785021
    Abstract: According to an aspect, a liquid crystal display device includes: a first substrate; a second substrate; a liquid crystal layer between the first and second substrates; pixels each including sub-pixels corresponding to different color areas; a first electrode in each sub-pixel; and a second electrode facing the first electrode. The first electrode includes an electrode base portion extending in a first direction; and a plurality of comb tooth portions extending in a second direction from the electrode base portion. A slit pitch of a sub-pixel in one color area and a slit pitch of a sub-pixel in the other color area of at least two color areas out of different color areas are different in size, each slit pitch corresponding to a gap between the comb tooth portions adjacent to each other.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: October 10, 2017
    Assignee: Japan Display Inc.
    Inventors: Toshiharu Matsushima, Keiji Takizawa, Toshinori Uehara
  • Patent number: 9463788
    Abstract: A control device for a hybrid vehicle, including a mode whereby the vehicle runs using a motor only, and a mode whereby the vehicle uses both the motor and an engine. When the motor temperature of an MG(2) exceeds a threshold temperature, an ECU moves from a running mode that uses the MG(2) only, to a running mode that limits the load on the MG(2). The ECU performs control in accordance with the charging state of the battery for running, such that the work rate of an electric pump for cooling the MG(2) is increased when the charging state is higher, and the running mode that uses the MG(2) only is maintained.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: October 11, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiji Takizawa, Tomohiko Miyamoto, Shuhei Matsusaka
  • Patent number: 9293957
    Abstract: Each of segment coils arranged as aligned in a slot of a stator core includes a coil central portion accommodated in the slot and two coil end portions protruding outward. The coil end portion of the two coil end portions includes a pair of coil pieces formed by inclining a coil at different angles toward the coil central portion with a vertex lying therebetween. Any one of the pair of coil pieces includes in a region in the vicinity of the vertex, a recessed step portion formed from two sides in non-parallel to and at an angle with respect to an end surface of the stator core.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: March 22, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keiji Takizawa, Naoto Koshino, Shinichi Iizuka, Hironobu Saka, Takeshi Ariyoshi, Takashi Hirakushi
  • Publication number: 20150378222
    Abstract: According to an aspect, a liquid crystal display device includes: a first substrate; a second substrate; a liquid crystal layer between the first and second substrates; pixels each including sub-pixels corresponding to different color areas; a first electrode in each sub-pixel; and a second electrode facing the first electrode. The first electrode includes an electrode base portion extending in a first direction; and a plurality of comb tooth portions extending in a second direction from the electrode base portion. A slit pitch of a sub-pixel in one color area and a slit pitch of a sub-pixel in the other color area of at least two color areas out of different color areas are different in size, each slit pitch corresponding to a gap between the comb tooth portions adjacent to each other.
    Type: Application
    Filed: June 29, 2015
    Publication date: December 31, 2015
    Inventors: Toshiharu MATSUSHIMA, Keiji TAKIZAWA, Toshinori UEHARA
  • Patent number: 9126585
    Abstract: A control device for a hybrid vehicle, including a mode whereby the vehicle runs using a motor only, and a mode whereby the vehicle uses both the motor and an engine. When the motor temperature of an MG(2) exceeds a threshold temperature, an ECU moves from a running mode that uses the MG(2) only, to a running mode that limits the load on the MG(2). When the charging state of a battery for running exceeds a threshold value, the ECU performs control such that in addition to the system voltage for driving the MG(2) being reduced, the threshold temperature is increased, and the running mode whereby only the MG(2) is used is maintained.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: September 8, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiji Takizawa, Tomohiko Miyamoto, Shuhei Matsusaka
  • Publication number: 20150070308
    Abstract: A display device with touch detection function includes: a display panel including a display plane for displaying images and an electrostatic capacitance type touch detection device; a cover member stacked on the display plane of the display panel, the cover member having at least one recess portion and/or projection portion on the side of a touch surface opposite to a plane that faces the display panel; and a controller configured to send a signal upon the touch detection device detects a variance of electrostatic capacitance proximity to the at least one recess portion and/or projection portion.
    Type: Application
    Filed: September 5, 2014
    Publication date: March 12, 2015
    Inventors: Keiji TAKIZAWA, Kazuyuki YAMADA, Akio NAKAMURA
  • Publication number: 20140300239
    Abstract: A segment coil capable of achieving effective prevention of magnetic flux leakage or eddy current and enhancing efficiency of a motor is provided. Segment coils in stator of a rotating electric machine including an annular core and rectangular wire coils in a plurality of layers, which are attached on an innermost circumferential side in a direction of radius of a slot formed in an inner circumferential portion of the annular core and are opposed to a rotor, are each constituted of a plurality of divided wires as divided in a circumferential direction of the annular core. The plurality of divided wires are integrally joined in coil end portions extending from the slot.
    Type: Application
    Filed: October 22, 2012
    Publication date: October 9, 2014
    Inventors: Keiji Takizawa, Tomoka Suzuki, Shinichi Iizuka, Hironobu Saka, Takeshi Ariyoshi
  • Publication number: 20140300236
    Abstract: Each of segment coils arranged as aligned in a slot of a stator core includes a coil central portion accommodated in the slot and two coil end portions protruding outward. The coil end portion of the two coil end portions includes a pair of coil pieces formed by inclining a coil at different angles toward the coil central portion with a vertex lying therebetween. Any one of the pair of coil pieces includes in a region in the vicinity of the vertex, a recessed step portion formed from two sides in non-parallel to and at an angle with respect to an end surface of the stator core.
    Type: Application
    Filed: October 22, 2012
    Publication date: October 9, 2014
    Inventors: Keiji Takizawa, Naoto Koshino, Shinichi Iizuka, Hironobu Saka, Takeshi Ariyoshi, Takashi Hirakushi
  • Publication number: 20140236410
    Abstract: A control device for a hybrid vehicle, including a mode whereby the vehicle runs using a motor only, and a mode whereby the vehicle uses both the motor and an engine. When the motor temperature of an MG(2) exceeds a threshold temperature, an ECU moves from a running mode that uses the MG(2) only, to a running mode that limits the load on the MG(2). When the charging state of a battery for running exceeds a threshold value, the ECU performs control such that in addition to the system voltage for driving the MG(2) being reduced, the threshold temperature is increased, and the running mode whereby only the MG(2) is used is maintained.
    Type: Application
    Filed: October 6, 2011
    Publication date: August 21, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiji Takizawa, Tomohiko Miyamoto, Shuhei Matsusaka
  • Publication number: 20140229052
    Abstract: A control device for a hybrid vehicle, including a mode whereby the vehicle runs using a motor only, and a mode whereby the vehicle uses both the motor and an engine. When the motor temperature of an MG(2) exceeds a threshold temperature, an ECU moves from a running mode that uses the MG(2) only, to a running mode that limits the load on the MG(2). The ECU performs control in accordance with the charging state of the battery for running, such that the work rate of an electric pump for cooling the MG(2) is increased when the charging state is higher, and the running mode that uses the MG(2) only is maintained.
    Type: Application
    Filed: October 6, 2011
    Publication date: August 14, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keiji Takizawa, Tomohiko Miyamoto, Shuhei Matsusaka
  • Patent number: 8780025
    Abstract: Light reflecting layers 45a that totally reflect light are provided inside the subpixels 10 disposed in particular regions on an inner face of a TFT array substrate 4, and light reflecting layers 45b that scatter light are provided inside the subpixels 10 other than those. Thanks to this, the reflectance of the light reflecting layers 45a can be rendered different from that of the light reflecting layers 45b. As a result, differences can be created in the display light formed by the light reflecting layers 45a and by the light reflecting layers 45b, by means of the light that is reflected thereat. Thereby, fine adjustment of the display light brightness and contrast is enabled, so that a liquid crystal display device 1 with extensive power of expression and superior display characteristics is provided.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: July 15, 2014
    Assignee: Japan Display West Inc.
    Inventors: Toshinori Uehara, Kimitaka Kamijo, Keiji Takizawa, Tomoyuki Nakano, Kunio Maruyama, Hiroki Sugiyama