Patents by Inventor Yoshihisa Iwamoto

Yoshihisa Iwamoto 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: 20130229610
    Abstract: A liquid crystal display includes first and second substrates placed opposite each other, a common electrode on one side of the first substrate to substantially cover a whole surface, a segment electrode on one side of the second substrate, a routing wire on one side of the second substrate and connected to the segment electrode, a liquid-crystalline resin film without electrical conductivity on one side of the second substrate, and a liquid crystal film between the substrates. The liquid-crystalline resin film has refractive index anisotropy being substantially equal to that of a liquid crystal material of the liquid crystal film, has molecular alignment being substantially equal to that of the liquid crystal film, and is disposed to fill a space between the routing wire and the common electrode. The liquid crystal film is disposed to fill a space between the segment electrode and the common electrode.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 5, 2013
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Yoshihisa IWAMOTO, Kunihiko KATANO
  • Publication number: 20130229599
    Abstract: A liquid crystal display includes first and second substrates placed opposite each other, a common electrode on one side of the first substrate to substantially cover a whole surface, a segment electrode on one side of the second substrate, a routing wire on one side of the second substrate and connected to the segment electrode, a liquid-crystalline resin film without electrical conductivity on one side of the second substrate, and a liquid crystal film between the substrates, and being subject to twisted alignment between the substrates. The liquid-crystalline resin film has refractive index anisotropy being substantially equal to that of a liquid crystal material of the liquid crystal film, is subject to twisted alignment, and is disposed to fill a space between the routing wire and the common electrode. The liquid crystal film is disposed to fill a space between the segment electrode and the common electrode.
    Type: Application
    Filed: March 1, 2013
    Publication date: September 5, 2013
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Yoshihisa IWAMOTO, Kunihiko KATANO
  • Patent number: 8427619
    Abstract: A liquid crystal display unit has: a pair of opposing substrates; an electrode pattern formed on each of the substrates on an opposing surface side; a vertical alignment film formed on each of the substrates and covering the electrode pattern; a liquid crystal layer squeezed between the substrates; and a pair of polarizer plates formed on the substrates on an opposite side to the side of said liquid crystal layer, wherein an edge of the electrode pattern includes a zigzag pattern parallel to one of axis directions of the polarizer plates and a direction perpendicular the axis direction. Optical through can be reduced along an edge portion of a pixel of a vertical alignment LCD.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: April 23, 2013
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Masatoshi Horii, Takashi Sugiyama, Yoshihisa Iwamoto, Keiichi Hirata
  • Publication number: 20130021569
    Abstract: To improve the display uniformity in a vertical alignment liquid crystal display. A liquid crystal display includes: first and second substrates; first and second electrodes provided the substrates, respectively; first and second vertical alignment films provided on the substrates respectively; a plurality of columnar spacers disposed at least in a region where the first and second electrodes are superimposed, and provided between the first and second substrates; and a liquid crystal layer provided between the first and second substrates. The first vertical alignment film is subject to an alignment treatment in one direction. The liquid crystal layer has a pretilt angle during non-application of voltage. Each columnar spacer has a profile, in a planar view, which is not orthogonal to and which is not parallel with an alignment direction of liquid crystal molecules at substantially center of the liquid crystal layer in a layer thickness direction.
    Type: Application
    Filed: July 19, 2012
    Publication date: January 24, 2013
    Applicant: Stanley Electric Co., Ltd.
    Inventors: Yoshihisa IWAMOTO, Kunihiko Katano, Keisuke Kato
  • Patent number: 8351001
    Abstract: First and second polarizers are disposed in cross-Nichol configuration. A liquid crystal cell is disposed between the two polarizers and establishes vertical alignment in a state of no voltage application. An even number of optical films having optical anisotropy and disposed between the liquid crystal cell and first polarizer. A retardation of the liquid crystal cell is in a range between 300 nm and 1500 nm; and each optical film satisfies nx>n?z, an in-plane retardation is smaller than 300 nm, a thickness direction retardation is in a range between 50 nm and 300 nm, an angle between an in-plane slow axis of the optical film disposed nearest to the first polarizer and an absorption axis of the first polarizer is smaller than 45°, and the slow axes of mutually adjacent optical films are perpendicular to each other.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: January 8, 2013
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Yoshihisa Iwamoto
  • Patent number: 8339547
    Abstract: A vertical alignment type liquid crystal display, which has a liquid crystal layer whose retardation value is about 600 nm or more, can solve the viewing angle problems associated with the wider viewing angle. The liquid crystal display can include a vertical alignment liquid crystal cell, and first and second polarizing plates cross-Nicol disposed on respective sides of the liquid crystal cell. The liquid crystal cell has a liquid crystal layer with a retardation of about 600 nm or more. A C-plate and an A-plate are provided between the liquid crystal cell and the first polarizing plate, and two C-plates are provided between the liquid crystal cell and the second polarizing plate.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: December 25, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Takashi Sugiyama, Yoshihisa Iwamoto
  • Patent number: 8269929
    Abstract: A vertically aligned liquid crystal cell to be simple-matrix driven is disposed between two polarizing plates crossed-Nicol disposed, the liquid crystal cell including a liquid crystal layer having a retardation in a cross section in a thickness direction larger than 550 nm. A C plate and a biaxial plate are disposed collectively between the liquid crystal cell and one of the polarizing plates, the C plate being disposed on the liquid crystal cell side and the biaxial plate being disposed on the polarizing plate side. The biaxial plate is disposed in such a manner that the in-plane delay phase axis of the biaxial plate is perpendicular to the absorption axis of the adjacent polarizing plate.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: September 18, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Takashi Sugiyama, Yoshihisa Iwamoto
  • Patent number: 8248561
    Abstract: A liquid crystal display includes: a liquid crystal layer squeezed between first and second substrates and vertically aligned at a retardation of 300-1000 nm; first and second compensators disposed on the first substrate and having negative biaxial optical anisotropy; a first polarizer disposed on the first and second compensators; and a second polarizer on the second substrate disposed crossed-Nichol with said first polarizer, wherein: the second compensator is disposed between the first substrate and first compensator; an in-plane slow axis of the first compensator is disposed perpendicular to an absorption axis of the first polarizer; the in-plane slow axis of the first compensator is disposed perpendicular to an in-plane slow axis of the second compensator; and a retardation in an in-plane direction of the first compensator is larger than that of the second compensator.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: August 21, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Yoshihisa Iwamoto
  • Patent number: 8199283
    Abstract: First and second polarizers are disposed in cross Nichol configuration. A liquid crystal cell is disposed between the two polarizers and establishes vertical alignment in a state of no voltage application. An even number of optical films having optical anisotropy and disposed between the liquid crystal cell and first polarizer. A retardation of the liquid crystal cell is in a range between 300 nm and 1500 nm; and each optical film satisfies nx>ny?nz, an in-plane retardation is smaller than 300 nm, a thickness direction retardation is in a ranger between 50 nm and 300 nm, an angle between an in-plane slow axis of the optical film disposed nearest to the first polarizer and an absorption axis of the first polarizer is smaller than 45°, and the slow axes of mutually adjacent optical films are perpendicular to each other.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: June 12, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Yoshihisa Iwamoto
  • Patent number: 8179509
    Abstract: A liquid crystal display device using a low duty ratio driving method with a duty ratio not smaller than 1/16 is manufactured in the following manner. A first substrate is prepared having a first electrode of a predetermined shape. A second substrate is prepared having a second electrode of a shape different from said predetermined shape, the second electrode having signal line electrodes smaller in number than those of the first electrode. An insulating film having necessary insulation is formed on each of the first and second electrodes. First and second vertical alignment films are formed above the first and second substrates, respectively, the first and second vertical alignment films covering the first and second electrodes, respectively. A rubbing process is executed only for the second vertical alignment film. The first and second substrates are disposed facing each other, and liquid crystal having a negative dielectric constant anisotropy is disposed between the first and second substrates.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: May 15, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Yoshihisa Iwamoto, Hajime Shimizu
  • Publication number: 20120105786
    Abstract: The liquid crystal display device comprises a first and a second substrate placed opposite each other, a first electrode provided on the first substrate extending in a first direction, a second electrode provided on the second substrate extending in a second direction that is orthogonal to the first direction, and a vertically-aligned liquid crystal layer provided between the two substrates. A pixel is configured where the two electrodes intersect, and alignment treatment is performed to the first or second substrate in a direction parallel to the first direction, and the first electrode is a linear shape in which electrode edges on either side extend in the first direction, and the second electrode is of a broken curve shape in which an electrode edge of one side includes a line segment which obliquely crosses the first direction, and with the pixel, pixel edges are demarcated including the obliquely crossing line segments.
    Type: Application
    Filed: October 25, 2011
    Publication date: May 3, 2012
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Yoshihisa Iwamoto, Kunihiko Katano, Hiroto Fukushima
  • Publication number: 20120105782
    Abstract: A liquid crystal display element comprises a pair of substrates facing each other with a predetermined gap, strips of first electrodes formed on one substrate, strips of second electrodes formed on another substrate and crossing the first electrodes, an alignment film formed on at least one of the substrates and treated with an alignment process in a direction not perpendicular to a longitudinal direction of the second electrodes, a vertical alignment mode liquid crystal layer placed between the substrates and having a pretilt angle, and a pair of polarizers sandwiching the substrates, wherein the fist and the second electrodes cross each other to form pixels, and non-uniform alignment regions where liquid crystal molecules in a center of a thickness of the liquid crystal layer are aligned in a different direction from the direction defined by the alignment process appear near an edge of each pixel.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 3, 2012
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Yoshihisa IWAMOTO, Kunihiko KATANO
  • Patent number: 8169574
    Abstract: A liquid crystal display includes: a liquid crystal layer squeezed between first and second transparent substrates and vertically aligned at a retardation of 300 nm or larger to 940 nm or smaller; two or three viewing angle compensators disposed on the first transparent substrate on the side opposite to the liquid crystal layer, each of the viewing angle compensators having a retardation of 90 nm or larger to 350 nm or smaller in a thickness direction and a retardation of 5 nm or larger to 30 nm or smaller in an in-plane direction; a first polarizer disposed on the two or three viewing angle compensator; and a second polarizer disposed on the second transparent substrate and crossed-Nichol disposed relative to the first polarizer, wherein an in-plane slow axis of each viewing angle compensator is disposed perpendicular to an absorption axis of the first polarizer.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: May 1, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Yoshihisa Iwamoto
  • Patent number: 8164697
    Abstract: A liquid crystal display device includes: a pair of substrates each disposed on each opposing plane and having an electrode of a predetermine shape; a vertical alignment film formed covering each of the electrodes of the pair of substrates and subjected to a rubbing alignment process; an insulating film formed between the electrode and the vertical alignment film in each of the pair of substrates and having necessary insulation; and liquid crystal sandwiched between the pair of substrates and having a negative dielectric anisotropy ?? and a specific resistance ?c1 of 1.0×1014 ?cm to 1.0×1015 ?cm, wherein a structure between the electrodes is selected to satisfy conditions of T?5.2×?c1×1/(1×1012) sec and T?500 sec, where T is a charge resident time until a display image disappears completely after static electricity of 10 kV is applied between the electrodes of the pair of substrate and the display image is tuned on.
    Type: Grant
    Filed: January 4, 2008
    Date of Patent: April 24, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Yoshihisa Iwamoto, Hajime Shimizu
  • Publication number: 20120086880
    Abstract: First and second polarizers are disposed in cross-Nichol configuration. A liquid crystal cell is disposed between the two polarizers and establishes vertical alignment in a state of no voltage application. An even number of optical films having optical anisotropy and disposed between the liquid crystal cell and first polarizer. A retardation of the liquid crystal cell is in a range between 300 nm and 1500 nm; and each optical film satisfies nx>n?z, an in-plane retardation is smaller than 300 nm, a thickness direction retardation is in a range between 50 nm and 300 nm, an angle between an in-plane slow axis of the optical film disposed nearest to the first polarizer and an absorption axis of the first polarizer is smaller than 45°, and the slow axes of mutually adjacent optical films are perpendicular to each other.
    Type: Application
    Filed: December 16, 2011
    Publication date: April 12, 2012
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventor: Yoshihisa IWAMOTO
  • Publication number: 20120086894
    Abstract: A liquid crystal display element comprises a first and a second substrates, a vertical alignment liquid crystal layer, and a first and a second polarizers arranged to cross approximately their absorption axes and an alignment direction of liquid crystal molecules when no voltage is applied at almost 45 degrees. At least one of the electrodes comprises a polyline extending to an extending direction as a whole and having no straight line in parallel to the extending direction along an electrode edge, and the polyline is formed along an edge of at least one of the first and the second electrodes where the alignment directions when a voltage is applied and when no voltage is applied are opposite to each other if the polyline is a straight line along the extending direction.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 12, 2012
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Hiroto FUKUSHIMA, Yoshihisa Iwamoto
  • Publication number: 20120075561
    Abstract: A liquid crystal display includes a first substrate having a first electrode on one surface side, a second substrate having second electrode on one surface side and placed opposite to the first substrate. A liquid crystal layer having a pretilt angle of 89.7° or more and less than 90° is disposed between the first and second electrodes. The first and second electrodes respectively form a pixel in opposing areas. The first electrode includes rectangularly shaped openings disposed with regularity in the pixel in a planar view. The openings include first and second openings with longitudinal directions respectively facing first and second directions, the second direction different from the first direction. The angle formed by the longitudinal directions of the first and second openings, and an alignment direction of liquid crystal molecules at the substantial center of the liquid crystal layer is 0° or more and less than 90°.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 29, 2012
    Applicant: Stanley Electric Co., Ltd.
    Inventors: Yoshihisa IWAMOTO, Kunihiko Katano
  • Publication number: 20120069278
    Abstract: A simple matrix type dot-matrix liquid crystal display element includes a first and a second transparent substrate disposed opposite to each other, first and second transparent electrodes disposed on the opposed face of the first and the second transparent substrate, respectively, a first and a second vertical alignment film disposed on the opposed side of the first and the second transparent substrate to cover the first and the second electrodes, respectively, a liquid crystal layer disposed between the opposed side of the first and the second transparent substrate and having ??<0 and ?nd>450 nm, and a first and a second viewing angle compensation plate disposed on the unopposed side of the first and the second transparent substrate, respectively, wherein in the first transparent electrode, openings extending in a predefined direction are aligned.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 22, 2012
    Applicant: STANLEY ELECTRIC CO., LTD
    Inventor: Yoshihisa IWAMOTO
  • Publication number: 20110304802
    Abstract: A liquid crystal display includes a first substrate including a first electrode, a second substrate including a second electrode, and a liquid crystal layer provided between the first substrate and the second substrate which is controlled to a substantially vertical orientation having a pretilt angle smaller than 90 degrees. The first electrode includes a plurality of rectangular openings extending in a direction substantially perpendicular to the orientation direction of liquid crystal molecules at substantially a center of the liquid crystal layer. A plurality of first areas and a plurality of second areas disposed mutually alternately are set in an effective display area in which the first electrode and the second electrode overlap in a planar view. Relative positions of the openings are mutually unmatched relative to at least a part of the plurality of second areas, and the openings are not formed in the plurality of first areas.
    Type: Application
    Filed: June 15, 2011
    Publication date: December 15, 2011
    Applicant: Stanley Electric Co., Ltd.
    Inventors: Yoshihisa IWAMOTO, Hiroto FUKUSHIMA
  • Publication number: 20110304803
    Abstract: A vertical alignment type liquid crystal display, which has a liquid crystal layer whose retardation value is about 600 nm or more, can solve the viewing angle problems associated with the wider viewing angle. The liquid crystal display can include a vertical alignment liquid crystal cell, and first and second polarizing plates cross-Nicol disposed on respective sides of the liquid crystal cell. The liquid crystal cell has a liquid crystal layer with a retardation of about 600 nm or more. A C-plate and an A-plate are provided between the liquid crystal cell and the first polarizing plate, and two C-plates are provided between the liquid crystal cell and the second polarizing plate.
    Type: Application
    Filed: August 22, 2011
    Publication date: December 15, 2011
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: TAKASHI SUGIYAMA, YOSHIHISA IWAMOTO