Patents Examined by Tirifur R. Chowdhury
  • Patent number: 6016178
    Abstract: A color reflective guest-host liquid-crystal display device is provided which does not require a polarizing plate and which has a bright screen. A transparent electrode is formed on an upper substrate of a color reflective guest-host liquid-crystal display device. A reflection electrode is formed on a lower substrate, and an electro-optic element is held in the spacing between the two substrates so as to perform light modulation in response to an applied voltage. The electro-optic element has a laminated structure including a guest-host liquid-crystal layer which contains a dichroic dye and which is uniformly oriented along the transparent electrode, and a phase shifter which has a predetermined optical anisotropic axis and which is formed along the reflection electrode. The transparent electrode and the reflection electrode face each other and define a plurality of pixels. A color filter assigns incident light of a different wavelength to each pixel.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: January 18, 2000
    Assignee: Sony Corporation
    Inventors: Hideo Kataoka, Nobuyuki Shigeno, Masaki Munakata, Tetsuo Urabe