Patents by Inventor Yasuo Toko

Yasuo Toko 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: 20190226656
    Abstract: A liquid crystal element comprises: a first substrate and a second substrate disposed substantially in parallel to each other to face each other, an electrode and a homeotropic alignment film being disposed on each of facing surfaces of the first substrate and the second substrate; and a liquid crystal layer disposed between the first substrate and the second substrate and formed of a liquid crystal material having a negative dielectric-constant anisotropy, wherein a twisting angle of the liquid crystal layer when a voltage is applied between the electrode of the first substrate and the electrode of the second substrate is in a range from 70° to 120°.
    Type: Application
    Filed: January 23, 2019
    Publication date: July 25, 2019
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Yasuo TOKO, Yoshihisa IWAMOTO
  • Publication number: 20190206350
    Abstract: To improve the appearance of a light distribution pattern. A liquid crystal element having a first substrate, a second substrate, and a liquid crystal layer, where the first substrate has a counter electrode, where the second substrate includes inter-pixel electrodes, wiring parts, an insulating layer provided above the inter-pixel electrodes and the wiring parts, and pixel electrodes provided above the insulating layer, where the pixel electrodes are arranged along a first direction and a second direction, where the inter-pixel electrodes are arranged to at least overlap with a gap between the two pixel electrodes adjacent to each other in the first direction among the pixel electrodes and are connected to one of the two pixel electrodes through a through hole provided in the insulating layer, and where the wiring parts are connected to one of the inter-pixel electrodes and are arranged on the lower layer side of the pixel electrodes.
    Type: Application
    Filed: December 26, 2018
    Publication date: July 4, 2019
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Yasuo TOKO, Tomohide MANO, Keisuke KATO
  • Publication number: 20190195457
    Abstract: A lighting device comprising: a light source for emitting lights along optic axis toward field of view; a liquid crystal element disposed on the optic axis, having electrode pattern in far field FF corresponding region and having no electrode pattern in near field corresponding region; a pair of polarizers including input side and output side polarizers sandwiching the liquid crystal element, constituting crossed Nicol polarizers; driver circuit for forming voltages applied to the electrode pattern; and phase shift forming element disposed between the pair of polarizers in the near field corresponding region of the liquid crystal element; wherein the far field corresponding region constitutes normally black optic system together with the pair of polarizers, and the near field corresponding region constitutes normally-on optic system together with the phase shift forming element and the pair of polarizers.
    Type: Application
    Filed: December 21, 2018
    Publication date: June 27, 2019
    Inventors: Yasuo Toko, Yoshifumi Takao, Takashi Sugiyama
  • Publication number: 20190187503
    Abstract: A lighting device includes: a liquid crystal element having electrode pattern including a first portion and a second portion; drive circuit connected to the electrode pattern; polarizer disposed in front of the liquid crystal element and separated from the liquid crystal element in optical axis direction; analyzer disposed at rear of the liquid crystal element, and separated from the liquid crystal element in optical axis direction, wherein the polarizer and the analyzer constitute crossed Nicol polarizers; light source for supplying lights to the liquid crystal element within a predetermined incident angle range; and projection optical system projecting lights transmitted through the liquid crystal element forwardly; wherein the polarizer and the analyzer locally overlap with the liquid crystal element in projection normal to the liquid crystal element, and when the light source is turned on, the drive circuit supplies drive signal to the first portion of the electrode pattern which applies or releases volta
    Type: Application
    Filed: December 19, 2018
    Publication date: June 20, 2019
    Inventors: Yasuo Toko, Yoshifumi Takao
  • Publication number: 20190155080
    Abstract: A liquid crystal apparatus comprises, a display device having a display surface, a first polarizing plate categorized as absorption type, disposed so as to face the display surface of the display device, and having a transmittance characteristic that a transmittance to a non-polarized light is 50% or more, a liquid crystal optical element disposed between the display device and the first polarizing plate, and a second polarizing plate categorized as reflection type and disposed between the display device and the liquid crystal optical element.
    Type: Application
    Filed: November 19, 2018
    Publication date: May 23, 2019
    Inventors: Tomohide MANO, Yasuo TOKO, Yoshihisa IWAMOTO
  • Publication number: 20190078749
    Abstract: An automotive headlight includes: a light source for emitting light; a polarization beam splitter for receiving a light flux from the light source, and dividing the light flux into a first polarization and a second polarization; a liquid crystal element disposed to receive the first polarization and the second polarization, divided by the polarization beam splitter; a phase shifter disposed on optical axis of one of the first polarization and the second polarization, and aligning polarization axis directions of the first polarization and the second polarization; and an output side polarizer disposed on output side of the liquid crystal element, wherein illumination regions corresponding to respective control electrodes in the liquid crystal element can be controlled to shield light.
    Type: Application
    Filed: September 8, 2018
    Publication date: March 14, 2019
    Inventors: Yasuo Toko, Ryotaro Owada, Yoshifumi Takao
  • Patent number: 10222020
    Abstract: There is provided a lighting fixture including: a light source that emits a light beam; an electrodeposition device that includes multiple pixels of which a transparent state and a mirror state are switchable, independently, and that is disposed such that a normal direction of a pixel surface is not parallel to an optical axis direction of an incident light beam on an optical path of a light beam emitted from the light source; and an optical system that emits, as an illumination beam, both a light beam transmitted through the electrodeposition device and a light beam reflected from the pixel in the mirror state in the electrodeposition device.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: March 5, 2019
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventor: Yasuo Toko
  • Publication number: 20190063712
    Abstract: To facilitate lead wiring layout corresponding to an increase in the number of individual electrodes of the liquid crystal element in a vehicle headlamp system. The vehicle headlamp system that selectively performs light irradiation towards the periphery of its own vehicle includes a light source, a liquid crystal element, and a lens. The liquid crystal element includes a plurality of first individual electrode parts, a plurality of second individual electrode parts, and a first lead wiring part. The first lead wiring part includes a plurality of first individual wirings each of which is connected to one of the plurality of first individual electrode parts, and a plurality of second individual wirings each of which is connected to one of the plurality of second individual electrode parts and arranged through a gap formed between the adjacent first individual electrode parts in the first direction.
    Type: Application
    Filed: August 7, 2018
    Publication date: February 28, 2019
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Yasuo TOKO, Tomohide MANO, Hiroshi TOZUKA
  • Patent number: 10168595
    Abstract: An electrodeposition element is provided which includes a first substrate including a first member and an electrode arranged above the first member, a second substrate arranged opposite to the first substrate and including an electrode, and an electrolyte layer arranged between the electrodes of the first substrate and the second substrate, and including an electrodeposition material that contains silver. When a voltage is applied between the electrodes of the first substrate and the second substrate such that the first substrate side is negative and the second substrate side is positive, a reflective surface made of a silver thin film and reflecting light, which is incident from a direction normal to the first and second substrates, in a direction not parallel to the incident direction of the light is formed above the electrode of the first substrate.
    Type: Grant
    Filed: October 12, 2015
    Date of Patent: January 1, 2019
    Assignees: STANLEY ELECTRIC CO., LTD., NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY
    Inventors: Yasuo Toko, Manabu Yatabe, Norihisa Kobayashi
  • Patent number: 10155470
    Abstract: A vehicle lighting device comprising a light source, a mirror member disposed on an optical axis of the light source, and a first optical element disposed on the optical axis of the light source between the light source and the mirror member, including a first region allowed to be switched between a light transmitting state and a light reflecting state and a second region having at least a light reflecting state, wherein the first region is capable of reflecting part of the light emitted from the light source to a relatively remote place, the second region is capable of reflecting part of the light emitted from the light source to a relatively near place, and the mirror member is capable of reflecting the light that is emitted from the light source and then passes through the first region to a relatively near place.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: December 18, 2018
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventor: Yasuo Toko
  • Patent number: 10054674
    Abstract: To reduce the size, simplify the structure of a light emitting and receiving system. The system that detects a target object with the use of reflected lights gained from a light irradiated to the target object includes a flat-plate shaped light control apparatus having light control parts, a light-entry apparatus allowing light to enter into a light control part, a light-receiving apparatus that receives emitting lights from the remaining light control parts, a control apparatus that controls the light-entry apparatus and the light-receiving apparatus and detects the target object. The light control apparatus includes liquid crystal elements supporting light control parts between a pair of substrates and a drive unit to drive the liquid crystal elements. Each of the light control parts includes a pair of electrodes, a high-resistance film disposed between the electrodes, and a liquid crystal layer disposed at least to the region overlapping the high-resistance film.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: August 21, 2018
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventors: Yasuo Toko, Yasuyuki Kawakami
  • Patent number: 9971224
    Abstract: To prevent damage in an electro-optical device that uses electrochromic material. The device includes electro-optical elements and a driving device that applies a driving voltage to the electro-optical elements. The driving device applies a first DC voltage of a positive polarity that cyclically repeats a first voltage and a second voltage that is lower than the first voltage, or a second DC voltage of a negative polarity that cyclically repeats a third voltage and a fourth voltage that is higher than the third voltage, to the electro-optical elements. According to the driving device, when the first DC voltage is applied to one and the second DC voltage is applied to the other electro-optical elements adjacent in the planar view, the first and the second DC voltages are supplied by time division so that the applied period of the first voltage and the third voltage do not overlap.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: May 15, 2018
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventor: Yasuo Toko
  • Publication number: 20180113201
    Abstract: To reduce the size, simplify the structure of a light emitting and receiving system. The system that detects a target object with the use of reflected lights gained from a light irradiated to the target object includes a flat-plate shaped light control apparatus having light control parts, a light-entry apparatus allowing light to enter into a light control part, a light-receiving apparatus that receives emitting lights from the remaining light control parts, a control apparatus that controls the light-entry apparatus and the light-receiving apparatus and detects the target object. The light control apparatus includes liquid crystal elements supporting light control parts between a pair of substrates and a drive unit to drive the liquid crystal elements. Each of the light control parts includes a pair of electrodes, a high-resistance film disposed between the electrodes, and a liquid crystal layer disposed at least to the region overlapping the high-resistance film.
    Type: Application
    Filed: October 17, 2017
    Publication date: April 26, 2018
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Yasuo TOKO, Yasuyuki KAWAKAMI
  • Publication number: 20180062097
    Abstract: To improve the accuracy of fully controlling the direction of advancing light. The liquid crystal element includes a first substrate and a second substrate, a liquid crystal layer provided between one surface side of the first substrate and one surface side of the second substrate, a pair of electrodes provided on one surface side of the first substrate with a gap therebetween in a planer view, a high-resistance film provided on one surface side of the first substrate and disposed between the pair of electrodes in a planer view and connected thereto, a first alignment film provided on one surface side of the first substrate covering the pair of electrodes and the high-resistance film, a second alignment film provided on one surface side of the second substrate, wherein sheet resistance of the high-resistance film is greater than sheet resistance of the pair of electrodes.
    Type: Application
    Filed: August 3, 2017
    Publication date: March 1, 2018
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventor: Yasuo TOKO
  • Publication number: 20170146883
    Abstract: To prevent damage in an electro-optical device that uses electrochromic material. The device includes electro-optical elements and a driving device that applies a driving voltage to the electro-optical elements. The driving device applies a first DC voltage of a positive polarity that cyclically repeats a first voltage and a second voltage that is lower than the first voltage, or a second DC voltage of a negative polarity that cyclically repeats a third voltage and a fourth voltage that is higher than the third voltage, to the electro-optical elements. According to the driving device, when the first DC voltage is applied to one and the second DC voltage is applied to the other electro-optical elements adjacent in the planar view, the first and the second DC voltages are supplied by time division so that the applied period of the first voltage and the third voltage do not overlap.
    Type: Application
    Filed: October 24, 2016
    Publication date: May 25, 2017
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventor: Yasuo TOKO
  • Patent number: 9588394
    Abstract: An optical apparatus includes first and second substrates disposed to oppose each other, the first substrate having a first electrode provided on a surface of the first substrate nearer to the second substrate, and the second substrate having a second electrode provided on a surface of the second substrate nearer to the first substrate, and an electrolyte layer sandwiched between the first and the second substrates, and containing electro-deposition material including silver, wherein when potential of the first electrode is used as reference, a first voltage of positive polarity is applied in a first period to the second electrode, and a second voltage of positive polarity lower than the first voltage is applied in a second period after the first period to the second electrode.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: March 7, 2017
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventors: Hiroto Fukushima, Yasuo Toko, Norihisa Kobayashi
  • Patent number: 9354481
    Abstract: To provide a liquid crystal element with a high contrast ratio capable of achieving both optical control that utilizes a memory property and optical control capable of supporting moving image displays. The two substrates are disposed with an angle formed by the respective orientation processing directions from 0° to less than 40°. The liquid crystal layer includes chiral material capable of generating a second orientation state that includes a twist different from that of the first orientation state in the liquid crystal molecules of the layer. The liquid crystal layer transitions from the second orientation state to the first orientation state and vice versa by the application of an electric field, and returns to the second orientation state when an electric field is applied in the second orientation state, thereby generating an orientation change in accordance with the size of the electric field, and the electric field is subsequently released.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: May 31, 2016
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventors: Yasuo Toko, Keisuke Kato
  • Publication number: 20160144769
    Abstract: A vehicle lighting device comprising a light source, a mirror member disposed on an optical axis of the light source, and a first optical element disposed on the optical axis of the light source between the light source and the mirror member, including a first region allowed to be switched between a light transmitting state and a light reflecting state and a second region having at least a light reflecting state, wherein the first region is capable of reflecting part of the light emitted from the light source to a relatively remote place, the second region is capable of reflecting part of the light emitted from the light source to a relatively near place, and the mirror member is capable of reflecting the light that is emitted from the light source and then passes through the first region to a relatively near place.
    Type: Application
    Filed: November 9, 2015
    Publication date: May 26, 2016
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventor: Yasuo TOKO
  • Patent number: 9348191
    Abstract: A liquid crystal element achieving both optical control utilizing a memory property and optical control capable of supporting moving image displays is disclosed. The first substrate and the second substrate of the element are set in an orientation process direction that ensures generation of a first orientation state, and a chiral material that generates a second orientation state is included in the liquid crystal layer. The layer transitions from the second orientation state to the first orientation state when an electric field of a layer thickness direction is applied. The layer transitions from the first orientation state to the second orientation state when an electric field of a direction perpendicular to the layer thickness direction is applied. And the layer returns to the second orientation state when an orientation change is generated according to the strength of the electric field when an electric field of the perpendicular direction is applied.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: May 24, 2016
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventor: Yasuo Toko
  • Publication number: 20160054632
    Abstract: An electrodeposition element is provided which includes a first substrate including a first member and an electrode arranged above the first member, a second substrate arranged opposite to the first substrate and including an electrode, and an electrolyte layer arranged between the electrodes of the first substrate and the second substrate, and including an electrodeposition material that contains silver. When a voltage is applied between the electrodes of the first substrate and the second substrate such that the first substrate side is negative and the second substrate side is positive, a reflective surface made of a silver thin film and reflecting light, which is incident from a direction normal to the first and second substrates, in a direction not parallel to the incident direction of the light is formed above the electrode of the first substrate.
    Type: Application
    Filed: October 12, 2015
    Publication date: February 25, 2016
    Applicants: NATIONAL UNIVERSITY CORPORATION CHIBA UNIVERSITY, STANLEY ELECTRIC CO., LTD.
    Inventors: Yasuo TOKO, Manabu YATABE, Norihisa KOBAYASHI