Patents by Inventor Chikako Tsujita

Chikako Tsujita 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: 6335777
    Abstract: A liquid crystal device, comprising: a pair of substrates each provided with an electrode including one substrate having thereon a color filter and a coating layer, and a liquid crystal layer comprising a chiral smectic liquid crystal disposed together with spacer beads between the pair of substrates, wherein the liquid crystal layer has a thickness smaller than a diameter of the spacer beads and a maximum thickness of the coating layer, the coating layer having a pencil hardness of at most 7 H. The above layer structure between the substrates is effective in improving resistance to external shock and providing a uniform cell gap.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: January 1, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuko Yokoyama, Yuichi Masaki, Kazuya Ishiwata, Tetsuro Saito, Yoshinori Shimamura, Tadashi Mihara, Kazunori Katakura, Sunao Mori, Chikako Tsujita
  • Publication number: 20010055084
    Abstract: A liquid crystal device, comprising: a pair of substrates each provided with an electrode including one substrate having thereon a color filter and a coating layer, and a liquid crystal layer comprising a chiral smectic liquid crystal disposed together with spacer beads between the pair of substrates, wherein the liquid crystal layer has a thickness smaller than a diameter of the spacer beads and a maximum thickness of the coating layer, the coating layer having a pencil hardness of at most 7H. The above layer structure between the substrates is effective in improving resistance to external shock and providing a uniform cell gap.
    Type: Application
    Filed: July 2, 2001
    Publication date: December 27, 2001
    Inventors: Yuko Yokoyama, Yuichi Masaki, Kazuya Ishiwata, Tetsuro Saito, Yoshinori Shimamura, Tadashi Mihara, Kazunori Katakura, Sunao Mori, Chikako Tsujita
  • Patent number: 6144435
    Abstract: A liquid crystal device, comprising: a pair of substrates each provided with an electrode including one substrate having thereon a color filter and a coating layer, and a liquid crystal layer comprising a chiral smectic liquid crystal disposed together with spacer beads between the pair of substrates, wherein the liquid crystal layer has a thickness smaller than a diameter of the spacer beads and a maximum thickness of the coating layer, the coating layer having a pencil hardness of at most 7 H. The above layer structure between the substrates is effective in improving resistance to external shock and providing a uniform cell gap.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: November 7, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuko Yokoyama, Yuichi Masaki, Kazuya Ishiwata, Tetsuro Saito, Yoshinori Shimamura, Tadashi Mihara, Kazunori Katakura, Sunao Mori, Chikako Tsujita
  • Patent number: 6122032
    Abstract: A liquid crystal device is constituted by a pair of oppositely disposed substrates each provided with a plurality of electrodes and a chiral smectic liquid crystal disposed so as to fill a prescribed gap between the substrates together with a plurality of spacers dispersed therein. The substrates includes a substrate having four sides at least one of which has a connecting portion to be connected with a drive circuit supplying a voltage to associated electrodes. The prescribed gap is decreased with an increasing distance from the connecting portion, whereby an uneven temperature distribution within the device resulting from heat generation in the vicinity of the connecting portion for the drive circuit can be alleviated or minimized to improve a display irregularity.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: September 19, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadashi Mihara, Tetsuro Saito, Akihiko Komura, Sunao Mori, Chikako Tsujita
  • Patent number: 5548429
    Abstract: A liquid crystal device is produced through the steps of: providing a pair of glass substrates each having thereon transparent electrodes, applying the substrates to each other with a thermosetting sealant so that the electrodes thereon oppose each other with a prescribed spacing therebetween, and disposing a liquid crystal at the spacing. In the process, prior to the step of applying the substrates, the thermosetting sealant is applied onto a prescribed part of one of the substrates, and the pair of substrates are both pre-baked under an identical condition for pre-baking the thermosetting sealant. As a result, the two substrates constituting the liquid crystal device are caused to have an identical thermal history so that the resultant liquid crystal device is provided with a uniform alignment characteristic free from difference in alignment power between the substrates and a good application accuracy between the substrates.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: August 20, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventor: Chikako Tsujita