Patents by Inventor Yasumitsu FUJITA

Yasumitsu FUJITA 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: 8749734
    Abstract: Unevenness due to the influence of a mesh when a sealing material for bonding a TFT substrate and a counter substrate together is formed on the counter substrate by screen printing is prevented. Light shielding films are extended in the horizontal direction and arranged in the vertical direction. Red color filters, blue color filters, and green color filters are extended in the vertical direction at predetermined intervals. The blue color filters are extended also in the horizontal direction so as to cover the light shielding films. In a cross section along the red color filter and the green color filter, the level of a portion above the light shielding film is higher compared with that of the other portion by the thicknesses of the blue color filter and the light shielding film. In screen printing, since the high portion serves as a stopper for the mesh, the occurrence of unevenness due to the mesh can be prevented.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: June 10, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Toshiyuki Mima, Yasumitsu Fujita, Toshiyuki Koshita
  • Publication number: 20100045914
    Abstract: An IPS-type liquid crystal display device which can prevent the occurrence of meshes flaw irregularities at the time of forming a sealing material for adhering a TFT substrate and a counter substrate by screen printing is provided. Rubbing which determines the initial alignment direction of liquid crystal molecules and a pretilt angle is applied to the TFT substrate and the counter substrate. In the IPS-type liquid crystal display device, it is necessary to set a pretilt angle to 2.5 degrees or less. The sealing material for adhering the TFT substrate and the counter substrate is formed on the counter substrate by screen printing. By setting an angle made by the squeezing direction in screen printing and the rubbing direction to a value which falls within a range from 165 degrees to 195 degrees, it is possible to prevent the occurrence of meshes flaw irregularities.
    Type: Application
    Filed: August 25, 2009
    Publication date: February 25, 2010
    Inventors: Toshiyuki MIMA, Yasumitsu Fujita, Kazunori Zenba
  • Publication number: 20100020275
    Abstract: Unevenness due to the influence of a mesh when a sealing material for bonding a TFT substrate and a counter substrate together is formed on the counter substrate by screen printing is prevented. Light shielding films are extended in the horizontal direction and arranged in the vertical direction. Red color filters, blue color filters, and green color filters are extended in the vertical direction at predetermined intervals. The blue color filters are extended also in the horizontal direction so as to cover the light shielding films. In a cross section along the red color filter and the green color filter, the level of a portion above the light shielding film is higher compared with that of the other portion by the thicknesses of the blue color filter and the light shielding film. In screen printing, since the high portion serves as a stopper for the mesh, the occurrence of unevenness due to the mesh can be prevented.
    Type: Application
    Filed: July 21, 2009
    Publication date: January 28, 2010
    Inventors: Toshiyuki MIMA, Yasumitsu FUJITA, Toshiyuki KOSHITA