Patents by Inventor Kazumi Kanesaka

Kazumi Kanesaka 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: 8520181
    Abstract: A liquid crystal display device includes a TFT substrate, a facing substrate and liquid crystal sandwiched therebetween. First pixels for displaying a first color according to a first color filter, second pixels for displaying a second color according a second color filter and third pixels for displaying a third color according to a third color filter are aligned in a longitudinal direction on the facing substrate, respectively. The first color filters, the second color filters, and the third color filters extend in stripes in the longitudinal direction so as to cover the first, second and third pixels, respectively. First spacers are formed between the first pixels by layering a number of color filters, including the first color filters, and second spacers are formed of a number of color filters, including the second color filters, between the second pixels. The first color filters which are formed between the second pixels are circular in plan view.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: August 27, 2013
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hiroaki Iwato, Yoshiki Watanabe, Norimichi Shirai, Kazumi Kanesaka
  • Patent number: 8482700
    Abstract: A panel for a liquid crystal display device includes: a first mother substrate for cutting out color filter substrates including a first cell area corresponding to a first cell and a second cell area corresponding to a second cell therefrom; a first colored layer arranged in the first cell area of the first mother substrate; a second colored layer arranged in the second cell area of the first mother substrate; a second mother substrate for cutting out array substrates therefrom; and liquid crystal sandwiched between the first mother substrate and the second mother substrate. The first colored layer and the second colored layer are made of the same material and have portions which have the same thickness. A hole is formed in the second colored layer so as to make color reproducibility of the second colored layer lower than color reproducibility of the first colored layer.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: July 9, 2013
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Shinpei Segawa, Hiroaki Iwato, Yoshiki Watanabe, Kazumi Kanesaka
  • Patent number: 8384858
    Abstract: A backlight source has a spectral distribution such that luminances of red and green light are stronger than luminance of blue light. A color filter includes a blue coloring layer that can best transmit a blue light, a red coloring layer that can best transmit a red light, a green coloring layer that can best transmit a green light, and a porous layer in which penetration holes are formed so as to penetrate therethrough in its thickness direction. The blue coloring layer is formed so as to be thicker than the red and green coloring layers. A liquid crystal layer is formed so as to be thinner in a portion facing the blue coloring layer than a portion facing the red and green coloring layers. The porous layer is formed from the same material and to have the same thickness as the blue coloring layer.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: February 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kikuo Ono, Kazumi Kanesaka
  • Patent number: 8027011
    Abstract: An object of the present invention is to form spacers for defining the space between the TFT substrate and the facing substrate of color filters, and by doing so, finely control the height of the spacers. First spacers 10 are formed of green color filters G in pillar form on top of red color filters R and blue color filters B (green color filters G) having a large area between blue pixels BP; second spacers 20 are formed by layering blue color filters B (green color filters G) and green color filters G having a large area on top of red color filters R in pillar form between green pixels GP; and the second spacers 20 are shorter than the first spacers 10 due to the leveling effects of the layered blue color filters B (green color filters G) and green color filters G.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: September 27, 2011
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hiroaki Iwato, Yoshiki Watanabe, Norimichi Shirai, Kazumi Kanesaka
  • Publication number: 20110205474
    Abstract: A liquid crystal display device includes a TFT substrate, a facing substrate and liquid crystal sandwiched therebetween. First pixels for displaying a first color according to a first color filter, second pixels for displaying a second color according a second color filter and third pixels for displaying a third color according to a third color filter are aligned in a longitudinal direction on the facing substrate, respectively. The first color filters, the second color filters, and the third color filters extend in stripes in the longitudinal direction so as to cover the first, second and third pixels, respectively. First spacers are formed between the first pixels by layering a number of color filters, including the first color filters, and second spacers are formed of a number of color filters, including the second color filters, between the second pixels. The first color filters which are formed between the second pixels are circular in plan view.
    Type: Application
    Filed: May 3, 2011
    Publication date: August 25, 2011
    Inventors: Hiroaki Iwato, Yoshiki Watanabe, Norimichi Shirai, Kazumi Kanesaka
  • Publication number: 20110109851
    Abstract: A backlight source has a spectral distribution such that luminances of red and green light are stronger than luminance of blue light. A color filter includes a blue coloring layer that can best transmit a blue light, a red coloring layer that can best transmit a red light, a green coloring layer that can best transmit a green light, and a porous layer in which penetration holes are formed so as to penetrate therethrough in its thickness direction. The blue coloring layer is formed so as to be thicker than the red and green coloring layers. A liquid crystal layer is formed so as to be thinner in a portion facing the blue coloring layer than a portion facing the red and green coloring layers. The porous layer is formed from the same material and to have the same thickness as the blue coloring layer.
    Type: Application
    Filed: November 3, 2010
    Publication date: May 12, 2011
    Inventors: Kikuo ONO, Kazumi Kanesaka
  • Publication number: 20100328588
    Abstract: A panel for a liquid crystal display device includes: a first mother substrate for cutting out color filter substrates including a first cell area corresponding to a first cell and a second cell area corresponding to a second cell therefrom; a first colored layer arranged in the first cell area of the first mother substrate; a second colored layer arranged in the second cell area of the first mother substrate; a second mother substrate for cutting out array substrates therefrom; and liquid crystal sandwiched between the first mother substrate and the second mother substrate. The first colored layer and the second colored layer are made of the same material and have portions which have the same thickness. A hole is formed in the second colored layer so as to make color reproducibility of the second colored layer lower than color reproducibility of the first colored layer.
    Type: Application
    Filed: June 29, 2010
    Publication date: December 30, 2010
    Inventors: Shinpei SEGAWA, Hiroaki IWATO, Yoshiki WATANABE, Kazumi KANESAKA
  • Publication number: 20090153785
    Abstract: An object of the present invention is to form spacers for defining the space between the TFT substrate and the facing substrate of color filters, and by doing so, finely control the height of the spacers. First spacers 10 are formed of green color filters G in pillar form on top of red color filters R and blue color filters B (green color filters G) having a large area between blue pixels BP; second spacers 20 are formed by layering blue color filters B (green color filters G) and green color filters G having a large area on top of red color filters R in pillar form between green pixels GP; and the second spacers 20 are shorter than the first spacers 10 due to the leveling effects of the layered blue color filters B (green color filters G) and green color filters G.
    Type: Application
    Filed: December 15, 2008
    Publication date: June 18, 2009
    Inventors: Hiroaki IWATO, Yoshiki Watanabe, Norimichi Shirai, Kazumi Kanesaka
  • Publication number: 20080079873
    Abstract: A liquid crystal display apparatus has: a pair of substrates; a pair of alignment plates disposed on the pair of substrates; a liquid crystal layer confined between the pair of substrates; an electrode group formed at least one of the pair of substrates, the electrode group applying an electric field to the liquid crystal layer; color filters formed on one of the pair of substrates; and a light source unit disposed on a back of the other of the pair of substrates, wherein the color filters include at least blue, green and red color filters, and wavelengths providing halves of a maximum transmittance of the green color filter are between from 590 nm to 610 n on one side, and between from 470 nm to 500 nm on the other side.
    Type: Application
    Filed: August 10, 2007
    Publication date: April 3, 2008
    Inventors: YUKA UTSUMI, Kazumi Kanesaka, Hiroshi Obata, Kikuo Ono
  • Patent number: 6897923
    Abstract: The present invention provides a reflective-type liquid crystal display device with a reflection electrode thereof formed on a resin binder layer wherein a number of fine particles are mingled in the resin binder layer and protrude their upper portions from the resin binder layer to make an upper surface of the resin binder layer rough, and improves reflection property thereof while simplifying a structure and manufacturing process therefor.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: May 24, 2005
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Kazumi Kanesaka, Tomoaki Tsuboka, Hisashi Yoshida, Masato Sakurai
  • Publication number: 20020176039
    Abstract: The present invention provides a reflective-type liquid crystal display device with a reflection electrode thereof formed on a resin binder layer wherein a number of fine particles are mingled in the resin binder layer and protrude their upper portions from the resin binder layer to make an upper surface of the resin binder layer rough, and improves reflection property thereof while simplifying a structure and manufacturing process therefor.
    Type: Application
    Filed: May 15, 2002
    Publication date: November 28, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Kazumi Kanesaka, Tomoaki Tsuboka, Hisashi Yoshida, Masato Sakurai