Patents Represented by Attorney Birxh, Stewart, Kolasch & Birch, LLP
  • Patent number: 6917396
    Abstract: A transmissive display apparatus comprises a liquid crystal display unit; and a plane light source unit that comprises a tubular light source, a light guide, and a light-diffusing film having anisotropy that provides a consistent luminance in a display surface, and/or ultraviolet (UV) absorbability that absorbs the UV from the light source and prevents deterioration of a prism sheet in the display unit and liquid display cell. In the film, a light-scattering characteristic F(?) represents a relationship between the light-scattering angle ? and a scattered light intensity F fulfills Fy(?)/Fx(?)?1.01 over a range of ?=4 to 30°, wherein Fx(?) and Fy(?) represent the light-scattering characteristics in an X-axial direction and Y-axial direction of the film, respectively. The film comprises a light-diffusing layer composed of a plurality of resins which are different from each other in refractive index, and a transparent layer laminated on at least one side thereof.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: July 12, 2005
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masanori Hiraishi, Masanari Ohnishi, Tomohiro Sasagawa, Naoko Iwasaki, Akimasa Yuuki, Osamu Murakami