Patents by Inventor Yoshihiko Hamawaki

Yoshihiko Hamawaki 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: 7993804
    Abstract: A color filter being precisely and easily manufactured while solving an alignment problem is provided. Further, a method for manufacturing a color filter structure formed in a display panel that has front and rear substrates opposed to each other is provided.
    Type: Grant
    Filed: August 3, 2006
    Date of Patent: August 9, 2011
    Assignee: TPO Hong Kong Holding Limited
    Inventors: Yoshihiko Hamawaki, Yashihisa Hatta, Yasuhiro Matsushita
  • Patent number: 7440053
    Abstract: To provide a transflective liquid crystal display device in which an amount of reflected light can be increased in a reflective mode. A liquid crystal panel 10 has a first glass substrate 101 and a second glass substrate 105. A backlight 11 is placed on the outside of the liquid crystal panel 10. A transmissive region 102 has a rectangular shape and is arranged in the center of the pixel. A reflective region 103 is arranged around the transmissive region 102. A reflecting layer 104 is formed in the reflective region 103 of the first glass substrate 101. A scattering layer 106 is formed in the transmissive region 102 of the second glass substrate 105.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: October 21, 2008
    Assignee: TPO Hong Kong Holding Limited
    Inventor: Yoshihiko Hamawaki
  • Publication number: 20070031742
    Abstract: A color filter being precisely and easily manufactured while solving an alignment problem is provided. Further, a method for manufacturing a color filter structure formed in a display panel that has front and rear substrates opposed to each other is provided.
    Type: Application
    Filed: August 3, 2006
    Publication date: February 8, 2007
    Inventors: Yoshihiko Hamawaki, Yashihisa Hatta, Yasuhiro Matsushita
  • Publication number: 20050179838
    Abstract: The invention provides a method of forming a reflective electrode with a reduced number of manufacturing steps and a reduced cost, and provides a liquid crystal display device to which said method is applied. A resist coating is applied on a reflective electrode film (3). Then the resist coating is exposed to light and developed in such a way that the remaining portions (4) of the resist coating having a plurality of holes (4a) remain. Then the reflective electrode film (3) is dry-etched using the remaining portions (4) as etching masks. Such a dry etching of the reflective electrode film (3) using the remaining portions (4) as etching masks forms a reflective electrode (30) having a plurality of holes (30a) in each pixel. Further, since the thickness changing region (30b) in which a thickness changes continuously is provided in the periphery of each hole (30a), the reflective electrode (30) can have a desired reflective characteristics.
    Type: Application
    Filed: September 27, 2001
    Publication date: August 18, 2005
    Inventor: Yoshihiko Hamawaki
  • Publication number: 20050157229
    Abstract: To provide a transflective liquid crystal display device in which an amount of reflected light can be increased in a reflective mode. A liquid crystal panel 10 has a first glass substrate 101 and a second glass substrate 105. A backlight 11 is placed on the outside of the liquid crystal panel 10. A transmissive region 102 has a rectangular shape and is arranged in the center of the pixel. A reflective region 103 is arranged around the transmissive region 102. A reflecting layer 104 is formed in the reflective region 103 of the first glass substrate 101. A scattering layer 106 is formed in the transmissive region 102 of the second glass substrate 105.
    Type: Application
    Filed: April 10, 2003
    Publication date: July 21, 2005
    Inventor: Yoshihiko Hamawaki