Patents by Inventor Hidefumi Yamashita

Hidefumi Yamashita 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: 8035792
    Abstract: One embodiment, among others, of an LCD panel includes an array substrate, a CF substrate facing the array substrate and offset by a cell gap from the array substrate, a plurality of spacers positioned on the array substrate or the CF substrate for maintaining the cell gap and supporting the array substrate and the CF substrate, and liquid crystal molecules sealed between the array substrate and the CF substrate. The spacers have different coefficients of elasticity per unit area. Other embodiments are included.
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: October 11, 2011
    Assignee: Chimei Innolux Corporation
    Inventors: Hidefumi Yamashita, Hideaki Kunieda
  • Patent number: 7667808
    Abstract: A liquid crystal display device includes a first electrode and a second electrode on a first substrate, wherein a horizontal electric field is generated between the first and second electrodes, and a third electrode on a second substrate, wherein a longitudinal electric field is generated between the third electrode and the first and second electrodes. In the liquid crystal display device, control of a wide viewing angle and a narrow viewing angle is enabled.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: February 23, 2010
    Assignee: LG Display Co., Ltd.
    Inventor: Hidefumi Yamashita
  • Patent number: 7486369
    Abstract: A liquid crystal display having an injection hole post structures compatible with liquid crystal are formed in an area near an injection hole to prevent pollutants seeped from an end-sealing material from penetrating into a display area, thereby suppressing the occurrence of picture quality trouble which easily occurs in the display area. The liquid crystal display includes a first substrate 11 and a second substrate 12 which are disposed with a predetermined gap therebetween, in which liquid crystal is sealed in the gap.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: February 3, 2009
    Assignee: International Business Machines Corporation
    Inventors: Hiroshi Niwa, Hidefumi Yamashita, Tatsushi Koike, Yoshiaki Ohbayashi
  • Publication number: 20070211203
    Abstract: A liquid crystal display having an injection hole post structures compatible with liquid crystal are formed in an area near an injection hole to prevent pollutants seeped from an end-sealing material from penetrating into a display area, thereby suppressing the occurrence of picture quality trouble which easily occurs in the display area. The liquid crystal display includes a first substrate 11 and a second substrate 12 which are disposed with a predetermined gap therebetween, in which liquid crystal is sealed in the gap.
    Type: Application
    Filed: April 6, 2007
    Publication date: September 13, 2007
    Inventors: Hiroshi Niwa, Hidefumi Yamashita, Tatsushi Koike, Yoshiaki Ohbayashi
  • Publication number: 20070146606
    Abstract: A liquid crystal display device includes a first electrode and a second electrode on a first substrate, wherein a horizontal electric field is generated between the first and second electrodes, and a third electrode on a second substrate, wherein a longitudinal electric field is generated between the third electrode and the first and second electrodes. In the liquid crystal display device, control of a wide viewing angle and a narrow viewing angle is enabled.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 28, 2007
    Applicant: LG.PHILIPS LCD CO., LTD.
    Inventor: Hidefumi Yamashita
  • Patent number: 7202932
    Abstract: A liquid crystal display comprises an injection hole post structures compatible with liquid crystal formed in an area near an injection hole to prevent pollutants seeped from an end-sealing material from penetrating into a display area, thereby suppressing the deterioration of picture quality in the display area. The liquid crystal display comprises a first substrate and a second substrate having a predetermined gap therebetween. Liquid crystal is sealed in the gap. The liquid crystal display comprises post structures for controlling the gap, and a sealing material provided outside the display area for sealing the liquid crystal in the gap, and forming the open injection hole for injecting the liquid crystal therethrough. The end-sealing material seals the injection hole after the liquid crystal is sealed. Injection hole post structures are provided in the area near the injection hole, for dividing the injection hole into a plurality of portions.
    Type: Grant
    Filed: January 23, 2001
    Date of Patent: April 10, 2007
    Assignee: International Business Machines Corporation
    Inventors: Hiroshi Niwa, Hidefumi Yamashita, Tatsushi Koike, Yoshiaki Ohbayashi
  • Publication number: 20060181668
    Abstract: One embodiment, among others, of an LCD panel includes an array substrate, a CF substrate facing the array substrate and offset by a cell gap from the array substrate, a plurality of spacers positioned on the array substrate or the CF substrate for maintaining the cell gap and supporting the array substrate and the CF substrate, and liquid crystal molecules sealed between the array substrate and the CF substrate. The spacers have different coefficients of elasticity per unit area. Other embodiments are included.
    Type: Application
    Filed: February 14, 2005
    Publication date: August 17, 2006
    Inventors: Hidefumi Yamashita, Hideaki Kunieda
  • Patent number: 7088418
    Abstract: The present invention provides a liquid crystal display device having a narrow frame, which is capable of effectively removing a defective display owing to entering of a seal member to a display area. More specifically, the present invention is directed to a liquid crystal display device comprising first and second substrates 1 and 2 disposed at a predetermined gap d1; a liquid crystal sealed in the gap d1; a seal member 4 provided at the gap d1 between the first and second substrates 1 and 2 and outside a display area 3, the seal member 4 being for sealing the liquid crystal; and a wall-like structure 5 provided outside the display area 3 and inside the seal member 4, the wall-like structure 5 being made of a material different from that of the seal member 4 and composed of a plurality of rows.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: August 8, 2006
    Assignee: International Business Machines Corporation
    Inventors: Hidefumi Yamashita, Michikazu Noguchi, Taroh Hasumi, Tatsushi Koike
  • Patent number: 6734944
    Abstract: In the liquid crystal display 10, consisting of a first substrate (12) and a second substrate (14) facing each other, either or both of the first substrate (12) and the second substrate (14) is/are disposed in a non-display region, the spacers 18 consisting of a photosensitive resin regulating the cell gaps 16 between both substrates 12 and 14, and liquid crystal 20 sandwiched between the first substrate (12) and the second substrate (14), either a dynamic hardness value or a plastic deformation hardness value is within a fixed range.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: May 11, 2004
    Assignee: International Business Machines Corporation
    Inventors: Toshihiko Koseki, Hidefumi Yamashita, Taro Hasumi, Yuichi Momoi, Yoshinori Shohmitsu, Tomohito Johnai
  • Publication number: 20010033357
    Abstract: A liquid crystal display having an injection hole post structures compatible with liquid crystal are formed in an area near an injection hole to prevent pollutants seeped from an end-sealing material from penetrating into a display area, thereby suppressing the occurrence of picture quality trouble which easily occurs in the display area. The liquid crystal display includes a first substrate 11 and a second substrate 12 which are disposed with a predetermined gap therebetween, in which liquid crystal is sealed in the gap.
    Type: Application
    Filed: January 23, 2001
    Publication date: October 25, 2001
    Inventors: Hiroshi Niwa, Hidefumi Yamashita, Tatsushi Koike, Yoshiaki Ohbayashi