Invention Grant
US08018556B2 Liquid crystal display device having a biaxial first anisotropic film and a second anisotropic film having an optical axis in a thickness direction 有权
具有双轴第一各向异性膜的液晶显示装置和在厚度方向上具有光轴的第二各向异性膜

  • Patent Title: Liquid crystal display device having a biaxial first anisotropic film and a second anisotropic film having an optical axis in a thickness direction
  • Patent Title (中): 具有双轴第一各向异性膜的液晶显示装置和在厚度方向上具有光轴的第二各向异性膜
  • Application No.: US12245387
    Application Date: 2008-10-03
  • Publication No.: US08018556B2
    Publication Date: 2011-09-13
  • Inventor: Hiroshi Nagai
  • Applicant: Hiroshi Nagai
  • Applicant Address: JP Kanagawa
  • Assignee: NEC LCD Technologies, Ltd
  • Current Assignee: NEC LCD Technologies, Ltd
  • Current Assignee Address: JP Kanagawa
  • Agency: Sughrue Mion, PLLC
  • Priority: JP2007-260738 20071004
  • Main IPC: G02F1/1335
  • IPC: G02F1/1335
Liquid crystal display device having a biaxial first anisotropic film and a second anisotropic film having an optical axis in a thickness direction
Abstract:
A LCD device includes a LC cell including a homogeneously-oriented LC layer and a pair of transparent substrates. A pair of polarizing films sandwiching therebetween the LC cell. A protective layer of the light-emitting-side polarizing film has an optical isotropy, and protective layer of the light-incident-side polarizing film has an thickness-wise retardation of 20 to 90 nm. A biaxial optical anisotropic film is interposed between the light-emitting-side polarizing film and the LC cell, and a second optical anisotropic film for cancelling the wavelength dispersion caused by the biaxial optical anisotropic film is interposed between the light-incident-side polarizing film and the LC cell.The biaxial optical anisotropic film has three-dimensional refractive indexes ns, nf and nz that satisfy therebetween (ns−nz)/(ns−nf)≦0.5%.
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