Patents by Inventor Tomoko Kozuka

Tomoko Kozuka 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: 9684200
    Abstract: A liquid crystal display device includes a first substrate, a second substrate including an insulative substrate and a color filter layer formed on that side of the insulative substrate, which is opposed to the first substrate, the color filter layer including a first color filter of red, a third color filter of blue which is spaced apart from the first color filter, a fifth color filter of red which is spaced apart from the third color filter, a second color filter which is located between the first color filter and the third color filter and has a color which is different from red and blue, and a fourth color filter which is located between the third color filter and the fifth color filter and has a color which is different from red and blue, and a liquid crystal layer.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: June 20, 2017
    Assignee: Japan Display Inc.
    Inventors: Tomoko Kozuka, Keiji Tago, Hirokazu Morimoto
  • Patent number: 9508295
    Abstract: According to one embodiment, a display device includes a first substrate including a first pixel electrode disposed on a first color pixel of red, a second pixel electrode disposed on a second color pixel of green, a third pixel electrode disposed on a third color pixel of blue, and a fourth pixel electrode disposed on a fourth color pixel of white, a second substrate including a common electrode, and a liquid crystal layer held between the first substrate and the second substrate, wherein a top voltage applied to the fourth color pixel to correspond to a maximum gradation value is set to be less than a top voltage applied to each of the first color pixel and the second color pixel to correspond to respective maximum gradation values.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: November 29, 2016
    Assignee: Japan Display Inc.
    Inventors: Tomoko Kozuka, Jin Hirosawa, Yuuki Morita, Hiroyuki Kimura, Kazuya Arima, Masaaki Kabe, Yoshihiro Watanabe
  • Patent number: 9436042
    Abstract: In a method of manufacturing a liquid crystal display device, a process for forming a first substrate includes the steps; forming a first wiring electrically connected with a switching element and extending in a first direction, forming an insulating film covering the first wiring, painting an electrically conductive film including electrically conductive material on the insulating film, and forming a second wiring electrically connected with the switching element extending in a second direction orthogonally crossing the first direction, and a pixel electrode electrically connected with the switching element apart from the second wiring by patterning the electrically conductive film. A second substrate is formed by forming a main common electrode extending in the second direction. A liquid crystal display panel is manufactured by holding liquid crystal material between the first substrate and the second substrate while the main common electrode faces the second wiring.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: September 6, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Tomoko Kozuka, Hirokazu Morimoto
  • Patent number: 9244322
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including an interlayer insulation film covering a first wiring line, a second wiring line and a third wiring line on the interlayer insulation film, and a first electrode which is located between the second wiring line and the third wiring line on the interlayer insulation film, is spaced apart from the second wiring line and the third wiring line, a second substrate including a second electrode which is opposed to each of the second wiring line and the third wiring line, and a liquid crystal layer between the first substrate and the second substrate.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: January 26, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Tomoko Kozuka, Hirokazu Morimoto, Arihiro Takeda
  • Publication number: 20150109568
    Abstract: According to one embodiment, a display device includes a first substrate including a first pixel electrode disposed on a first color pixel of red, a second pixel electrode disposed on a second color pixel of green, a third pixel electrode disposed on a third color pixel of blue, and a fourth pixel electrode disposed on a fourth color pixel of white, a second substrate including a common electrode, and a liquid crystal layer held between the first substrate and the second substrate, wherein a top voltage applied to the fourth color pixel to correspond to a maximum gradation value is set to be less than a top voltage applied to each of the first color pixel and the second color pixel to correspond to respective maximum gradation values.
    Type: Application
    Filed: October 14, 2014
    Publication date: April 23, 2015
    Applicant: Japan Display Inc.
    Inventors: Tomoko KOZUKA, Jin Hirosawa, Yuuki Morita, Hiroyuki Kimura, Kazuya Arima, Masaaki Kabe, Yoshihiro Watanabe
  • Publication number: 20150009462
    Abstract: A liquid crystal display device includes a first substrate, a second substrate including an insulative substrate and a color filter layer formed on that side of the insulative substrate, which is opposed to the first substrate, the color filter layer including a first color filter of red, a third color filter of blue which is spaced apart from the first color filter, a fifth color filter of red which is spaced apart from the third color filter, a second color filter which is located between the first color filter and the third color filter and has a color which is different from red and blue, and a fourth color filter which is located between the third color filter and the fifth color filter and has a color which is different from red and blue, and a liquid crystal layer.
    Type: Application
    Filed: July 3, 2014
    Publication date: January 8, 2015
    Applicant: Japan Display Inc.
    Inventors: Tomoko Kozuka, Keiji Tago, Hirokazu Morimoto
  • Patent number: 8780302
    Abstract: According to one embodiment, a liquid crystal display device includes a main pixel electrode which extends in a second direction, a sub-pixel electrode which extends in a first direction and crosses the main pixel electrode, a color filter which includes a first aperture portion defined by a first edge surrounding a position opposed to cross points between the main pixel electrode and the sub-pixel electrode, main common electrodes which extend in the second direction on both sides of the main pixel electrode.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: July 15, 2014
    Assignee: Japan Display Inc.
    Inventors: Arihiro Takeda, Tomoko Kozuka, Jin Hirosawa
  • Publication number: 20140063391
    Abstract: According to one embodiment, a liquid crystal display device includes a main pixel electrode which extends in a second direction, a sub-pixel electrode which extends in a first direction and crosses the main pixel electrode, a color filter which includes a first aperture portion defined by a first edge surrounding a position opposed to cross points between the main pixel electrode and the sub-pixel electrode, main common electrodes which extend in the second direction on both sides of the main pixel electrode.
    Type: Application
    Filed: November 4, 2013
    Publication date: March 6, 2014
    Applicant: Japan Display Inc.
    Inventors: Arihiro TAKEDA, Tomoko Kozuka, Jin Hirosawa
  • Patent number: 8605244
    Abstract: According to one embodiment, a liquid crystal display device includes a main pixel electrode which extends in a second direction, a sub-pixel electrode which extends in a first direction and crosses the main pixel electrode, a color filter which includes a first aperture portion defined by a first edge surrounding a position opposed to cross points between the main pixel electrode and the sub-pixel electrode, main common electrodes which extend in the second direction on both sides of the main pixel electrode.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: December 10, 2013
    Assignee: Japan Display Inc.
    Inventors: Arihiro Takeda, Tomoko Kozuka, Jin Hirosawa
  • Publication number: 20130300992
    Abstract: In a method of manufacturing a liquid crystal display device, a process for forming a first substrate includes the steps; forming a first wiring electrically connected with a switching element and extending in a first direction, forming an insulating film covering the first wiring, painting an electrically conductive film including electrically conductive material on the insulating film, and forming a second wiring electrically connected with the switching element extending in a second direction orthogonally crossing the first direction, and a pixel electrode electrically connected with the switching element apart from the second wiring by patterning the electrically conductive film. A second substrate is formed by forming a main common electrode extending in the second direction. A liquid crystal display panel is manufactured by holding liquid crystal material between the first substrate and the second substrate while the main common electrode faces the second wiring.
    Type: Application
    Filed: April 29, 2013
    Publication date: November 14, 2013
    Applicant: Japan Display Inc.
    Inventors: Tomoko KOZUKA, Hirokazu MORIMOTO
  • Publication number: 20130038823
    Abstract: According to one embodiment, a liquid crystal display device includes a main pixel electrode which extends in a second direction, a sub-pixel electrode which extends in a first direction and crosses the main pixel electrode, a color filter which includes a first aperture portion defined by a first edge surrounding a position opposed to cross points between the main pixel electrode and the sub-pixel electrode, main common electrodes which extend in the second direction on both sides of the main pixel electrode.
    Type: Application
    Filed: May 11, 2012
    Publication date: February 14, 2013
    Inventors: Arihiro Takeda, Tomoko Kozuka, Jin Hirosawa
  • Publication number: 20130033661
    Abstract: According to one embodiment, a liquid crystal display device includes a first substrate including an interlayer insulation film covering a first wiring line, a second wiring line and a third wiring line on the interlayer insulation film, and a first electrode which is located between the second wiring line and the third wiring line on the interlayer insulation film, is spaced apart from the second wiring line and the third wiring line, a second substrate including a second electrode which is opposed to each of the second wiring line and the third wiring line, and a liquid crystal layer between the first substrate and the second substrate.
    Type: Application
    Filed: May 15, 2012
    Publication date: February 7, 2013
    Inventors: Tomoko KOZUKA, Hirokazu MORIMOTO, Arihiro TAKEDA
  • Publication number: 20070182313
    Abstract: A method of manufacturing an image display unit comprising forming a light-shielding layer by patterning on a front-side substrate opposed to a back-side substrate on which a number of electron emission elements are arranged, forming a plurality of fluorescent layer as a discontinuous pattern at intervals in an area where the light-shielding layer does not exist, and forming a metal back layer having an anode function on a top face of the fluorescent layer.
    Type: Application
    Filed: February 1, 2007
    Publication date: August 9, 2007
    Inventors: Akiyoshi NAKAMURA, Tomoko Kozuka, Akira Mikami, Takeo Ito
  • Publication number: 20070164655
    Abstract: A display device comprises a fluorescent screen provided with a shading portion including a plurality of openings, and a fluorescent layer formed on the shading portion, and a metal-back layer provided on the fluorescent screen and including a plurality of dividing means and a plurality of divisions defined by the dividing means, wherein the dividing means are provided on the shading portion via the fluorescent layer interposed therebetween, and an electrical resistance between each pair of adjacent ones of the divisions located with a corresponding dividing means interposed between the each pair falls within a range of 102? to 105? via the fluorescent layer.
    Type: Application
    Filed: January 5, 2007
    Publication date: July 19, 2007
    Inventors: Tomoko KOZUKA, Hajime Tanaka, Akiyoshi Nakamura, Akira Mikami, Takeo Ito
  • Publication number: 20070126334
    Abstract: An image display unit having a back-side substrate on which a number of electron emission elements are arranged, and a front-side substrate which is opposed to a back-side substrate and has fluorescent patterns and light-shielding patterns arranged at positions corresponding to electron emission elements, wherein a marking area is provided at least two locations in an ineffective part of the inside of the front-side substrate, corresponding to alignment marks of a dry plate, and each marking area has three alignment marks. According to the present invention, it is unnecessary to change R, G, B masks whenever three color fluorescent patterns are exposed, and realignment between a mask and a substrate is unnecessary.
    Type: Application
    Filed: February 5, 2007
    Publication date: June 7, 2007
    Inventors: Akiyoshi Nakamura, Tomoko Kozuka, Akira Mikami
  • Publication number: 20070085468
    Abstract: This image display device includes a rear plate having a large number of electron emission elements and a face plate placed opposite to the rear plate and having a pattern of a phosphor layer and a pattern of a light absorption layer (a black matrix), on an inner surface of a light transmissive panel. Each pattern portion of the phosphor layer has a polygonal shape obtained by cutting corners from a quadrangle concentric with the light emitting portion which receives electron beams emitted from electron emission elements to emit light. Further,the area of each pattern portion of the phosphor layer can be 1.5 to 4 times the area of the light emitting portion The image display device is capable of display of high quality with high contrast and without decrease in brightness.
    Type: Application
    Filed: November 17, 2004
    Publication date: April 19, 2007
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akiyoshi Nakamura, Tomoko Kozuka, Takeo Ito