Patents by Inventor Isamu Miyake

Isamu Miyake 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).

  • Patent number: 9817274
    Abstract: The present invention provides a method for manufacturing a liquid crystal display device, which hardly causes display unevenness in joining parts in which mutually neighboring exposure regions are overlapped upon carrying out a photo-alignment treatment for forming a horizontal alignment film.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: November 14, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Koichi Miyachi, Isamu Miyake
  • Patent number: 9817277
    Abstract: The present invention provides a liquid crystal display device including a horizontal alignment type liquid crystal layer, sub spacers, and a photo-alignment film, wherein the liquid crystal display device can suppress the occurrence of a disclination. The present invention relates to a liquid crystal display device including: a pair of substrates facing each other; and a horizontal alignment type liquid crystal layer interposed between the pair of substrates, wherein at least one of the pair of substrates includes a photo-alignment film, one of the pair of substrates includes multiple sub spacers, the multiple sub spacers are not in contact with the facing substrate under atmospheric pressure, and each of the multiple sub spacers is formed such that its thickness in a cross section monotonically increases and then monotonically decreases from one end to another end of the sub spacer.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: November 14, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shinichi Hirato, Isamu Miyake
  • Patent number: 9810950
    Abstract: The present invention provides a method for producing a liquid crystal display device which can produce a liquid crystal display device with favorable voltage holding ratio reliability and reduced image sticking.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: November 7, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroaki Asagi, Isamu Miyake, Akira Hirai
  • Publication number: 20170315393
    Abstract: The present invention provides a liquid crystal display device in which display unevenness is suppressed by preventing degradation of TFT characteristics due to photo-alignment treatment. The liquid crystal display of the present invention includes: a thin-film transistor substrate; and a liquid crystal layer, the thin-film transistor substrate including a thin-film transistor having a channel etch structure and an alignment film, the thin-film transistor including a gate electrode, a gate insulating film, a channel layer containing an oxide semiconductor, and a pair of a source electrode and a drain electrode in the stated order, the alignment film including at least one selected from the group consisting of a cinnamate structure, a chalcone structure, an azobenzene structure, a stilbene structure, a coumarin structure, and a phenyl ester structure.
    Type: Application
    Filed: November 19, 2015
    Publication date: November 2, 2017
    Inventors: ISAMU MIYAKE, YOHSUKE KANZAKI
  • Patent number: 9798179
    Abstract: The present invention provides a liquid crystal display device that includes a horizontal alignment film, stabilizes liquid crystal alignment by the PSA technique, can suppress the increase in power consumption, reduction in contrast, and image sticking in display, and has long-term reliability. The present invention is a liquid crystal display device including a pair of substrates, a liquid crystal layer interposed between the pair of substrates, a horizontal alignment film formed on at least one of the pair of substrates, and a polymer layer which is formed on the horizontal alignment film and controls the alignment of adjacent liquid crystal molecules, wherein the polymer layer is formed by the polymerization of at least one or more kinds of monomers added into the liquid crystal layer, and at least one of the one or more kinds of monomers is polymerized by itself functioning as a polymerization initiator by being irradiated with light.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: October 24, 2017
    Assignee: MERCK PATENT GMBH
    Inventors: Koichi Miyachi, Isamu Miyake
  • Publication number: 20170285413
    Abstract: The present invention provides a method for manufacturing a liquid crystal display device, which hardly causes display unevenness in joining parts in which mutually neighboring exposure regions are overlapped upon carrying out a photo-alignment treatment for forming a horizontal alignment film.
    Type: Application
    Filed: May 30, 2017
    Publication date: October 5, 2017
    Inventors: Koichi MIYACHI, Isamu MIYAKE
  • Publication number: 20170276976
    Abstract: The present invention provides a liquid crystal display device that, with photo-alignment films, can maintain a favorable voltage holding ratio for a long period of time and prevent generation of image sticking and stains on the display screen. The liquid crystal display device includes: an active-matrix liquid crystal panel; and a backlight, the liquid crystal panel including a liquid crystal layer, paired substrates holding the liquid crystal layer in between, and alignment films disposed on the liquid crystal layer side surfaces of the respective substrates, the alignment films each being a photo-alignment film formed from a material exhibiting photo-alignment performance, the liquid crystal layer containing a liquid crystal material and a radical scavenger.
    Type: Application
    Filed: August 24, 2015
    Publication date: September 28, 2017
    Inventors: Koichi MIYACHI, Masanobu MIZUSAKI, Tsuyoshi OKAZAKI, Hiroshi TSUCHIYA, Isamu MIYAKE, Toshihiro MATSUMOTO
  • Patent number: 9759949
    Abstract: The present invention provides a liquid crystal display panel and a liquid crystal display device having excellent display quality, with reduced string-like defects that occur in display pixels. The liquid crystal display panel of the present invention includes multiple spacers between a pair of substrates, wherein the spacers are arranged such that an inter-spacer distance between adjacent spacers in a longitudinal direction is different from an inter-spacer distance between adjacent spacers in a transverse direction, and an angle formed between a line connecting the spacers with a shorter inter-spacer distance and an alignment direction of liquid crystal molecules at a voltage lower than a threshold voltage in the liquid crystal layer is 20° or smaller.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: September 12, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Isamu Miyake, Koichi Miyachi
  • Publication number: 20170235192
    Abstract: The present invention provides a method for manufacturing a liquid crystal display device capable of suppressing display unevenness around a seal in the case of performing PS treatment on a horizontal alignment film formed from a photoactive material. The method for manufacturing a liquid crystal display device of the present invention includes the steps of: forming a horizontal alignment film containing a photoactive material on at least one substrate of a pair of substrates; dropping a liquid crystal composition containing a liquid crystal material and a monomer on one of the pair of substrates, the monomer being contained in an amount of 1.
    Type: Application
    Filed: May 3, 2017
    Publication date: August 17, 2017
    Inventors: Isamu MIYAKE, Koichi MIYACHI, Yuko TERAOKA
  • Patent number: 9733524
    Abstract: A liquid crystal display device (100) includes a first substrate (10) and a second substrate (20) opposing each other, and a liquid crystal layer (30) provided between the first substrate and the second substrate. At least one of the first substrate and the second substrate includes a horizontal alignment film (12, 22) provided on a side closer to the liquid crystal layer. The liquid crystal display device further includes an alignment sustaining layer (40a, 40b) provided between the horizontal alignment film and the liquid crystal layer, the alignment sustaining layer containing a polymerization product of a photopolymerizable compound. The photopolymerizable compound contains an acrylate group or a methacrylate group. The polymerization product in the alignment sustaining layer contains an acrylate group or a methacrylate group as a residue. The horizontal alignment film contains an acrylate group or a methacrylate group.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: August 15, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Isamu Miyake, Koichi Miyachi, Hiroaki Asagi, Akira Hirai
  • Publication number: 20170212393
    Abstract: The present invention provides a method for producing a liquid crystal display device which can produce a liquid crystal display device with favorable voltage holding ratio reliability and reduced image sticking.
    Type: Application
    Filed: July 23, 2015
    Publication date: July 27, 2017
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Hiroaki ASAGI, Isamu MIYAKE, Akira HIRAI
  • Publication number: 20170212390
    Abstract: The present invention provides a liquid crystal display device with reduced power consumption as well as reduced flicker. The liquid crystal display device is one in a transverse electric field mode, including: paired substrates; a photo-alignment film disposed on at least one of the substrates; a horizontal alignment liquid crystal layer disposed between the substrates; and pixels arranged in a matrix form, the liquid crystal layer containing liquid crystal molecules with a bicyclohexyl skeleton and liquid crystal molecules with a difluorobenzene skeleton, the liquid crystal layer having negative anisotropy of dielectric constant, one of the substrates including TFTs disposed in the respective pixels, the TFTs each including a semiconductor layer that contains an oxide semiconductor, the liquid crystal display device having a frame rate of lower than 50 Hz.
    Type: Application
    Filed: July 22, 2015
    Publication date: July 27, 2017
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Isamu MIYAKE, Koichi MIYACHI
  • Publication number: 20170212389
    Abstract: The present invention provides a liquid crystal display device that can maintain favorable contrast characteristics for a long period of time using a photo-alignment film. The liquid crystal display device includes in the following order from a back surface side: a backlight that emits light including visible light; a linear polarizer; a first substrate; an alignment film; a liquid crystal layer that contains liquid crystal molecules; and a second substrate, the alignment film containing a material with an azobenzene structure that exhibits anisotropic absorption of visible light and isomerizes upon absorption of visible light, the linear polarizer having a polarized light transmission axis that intersects a direction in which the alignment film has larger absorption anisotropy.
    Type: Application
    Filed: July 24, 2015
    Publication date: July 27, 2017
    Inventors: Hiroaki ASAGI, Isamu MIYAKE
  • Publication number: 20170192307
    Abstract: A liquid crystal display device according to the present invention has a display area that includes a plurality of pixels (Px). The display area is made up of n kinds of domains (where n is an integer that is equal to or greater than two and equal to or smaller than four). The directors of the n kinds of domains define mutually different alignment directions. If the domain structure of each pixel (Px) is defined by the kinds of the domains that form the pixel (Px), the number k of the kinds of the domains that form the pixel (Px), and the arrangement of the domains in the pixel (Px), the display area includes a pixel, of which k is less than n and of which the domain structure is different from the domain structures of adjacent pixels.
    Type: Application
    Filed: March 22, 2017
    Publication date: July 6, 2017
    Inventors: Isamu MIYAKE, Tomohiko MORI, Iichiroh INOUE
  • Patent number: 9690141
    Abstract: The present invention provides a method for manufacturing a liquid crystal display device, which hardly causes display unevenness in joining parts in which mutually neighboring exposure regions are overlapped upon carrying out a photo-alignment treatment for forming a horizontal alignment film.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: June 27, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Koichi Miyachi, Isamu Miyake
  • Patent number: 9671650
    Abstract: The present invention provides a method for manufacturing a liquid crystal display device capable of suppressing display unevenness around a seal in the case of performing PS treatment on a horizontal alignment film formed from a photoactive material. The method for manufacturing a liquid crystal display device of the present invention includes the steps of: forming a horizontal alignment film containing a photoactive material on at least one substrate of a pair of substrates; dropping a liquid crystal composition containing a liquid crystal material and a monomer on one of the pair of substrates, the monomer being contained in an amount of 1.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: June 6, 2017
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Isamu Miyake, Koichi Miyachi, Yuko Teraoka
  • Patent number: 9638960
    Abstract: A liquid crystal display device according to the present invention has a display area that includes a plurality of pixels (Px). The display area is made up of n kinds of domains (where n is an integer that is equal to or greater than two and equal to or smaller than four). The directors of the n kinds of domains define mutually different alignment directions. If the domain structure of each pixel (Px) is defined by the kinds of the domains that form the pixel (Px), the number k of the kinds of the domains that form the pixel (Px), and the arrangement of the domains in the pixel (Px), the display area includes a pixel, of which k is less than n and of which the domain structure is different from the domain structures of adjacent pixels.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: May 2, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Isamu Miyake, Tomohiko Mori, Iichiroh Inoue
  • Patent number: 9557605
    Abstract: The present invention provides a method of producing a liquid crystal display device which enables suppression of the occurrence of an electric double layer on a horizontal photo-alignment film before a polymer is formed, and exhibits reduced deterioration of display quality such as image sticking, or reduced display unevenness. The present invention is a method of producing a liquid crystal display device including the steps of (1) forming a liquid crystal layer containing a polymerizable monomer between a first substrate and a second substrate; (2) thermally annealing the liquid crystal layer at a temperature higher by 10° C. or more than the liquid crystalline phase-isotropic phase transition temperature of the liquid crystal layer; (3) forming horizontal alignment films to which the alignment treatment is performed by light irradiation on the first substrate and the second substrate by the time of the step (2); and (4) polymerizing the polymerizable monomer after the step (2).
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: January 31, 2017
    Assignee: Merck Patent GmbH
    Inventors: Isamu Miyake, Koichi Miyachi
  • Patent number: 9488869
    Abstract: The present invention provides a liquid crystal display device that sufficiently reduces image sticking, by forming a polymer layer with stable alignment control appropriately. In a method for manufacturing the liquid crystal display device of the present invention, base film forming conditions are different between the step of forming a base film on a substrate including an active element and the step of forming a base film on a substrate different from the substrate including an active element.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: November 8, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akira Hirai, Hiroaki Asagi, Isamu Miyake
  • Publication number: 20160313608
    Abstract: The present invention provides a liquid crystal display panel and a liquid crystal display device having excellent display quality, with reduced string-like defects that occur in display pixels. The liquid crystal display panel of the present invention includes multiple spacers between a pair of substrates, wherein the spacers are arranged such that an inter-spacer distance between adjacent spacers in a longitudinal direction is different from an inter-spacer distance between adjacent spacers in a transverse direction, and an angle formed between a line connecting the spacers with a shorter inter-spacer distance and an alignment direction of liquid crystal molecules at a voltage lower than a threshold voltage in the liquid crystal layer is 20° or smaller.
    Type: Application
    Filed: July 6, 2016
    Publication date: October 27, 2016
    Inventors: Isamu MIYAKE, Koichi MIYACHI