Invention Grant
US08488091B2 Liquid crystal display device 有权
液晶显示装置

  • Patent Title: Liquid crystal display device
  • Patent Title (中): 液晶显示装置
  • Application No.: US13120043
    Application Date: 2010-03-02
  • Publication No.: US08488091B2
    Publication Date: 2013-07-16
  • Inventor: Akira Sakai
  • Applicant: Akira Sakai
  • Applicant Address: JP Osaka
  • Assignee: Sharp Kabushiki Kaisha
  • Current Assignee: Sharp Kabushiki Kaisha
  • Current Assignee Address: JP Osaka
  • Agency: Nixon & Vanderhye P.C.
  • Priority: JP2009-127933 20090527
  • International Application: PCT/JP2010/053351 WO 20100302
  • International Announcement: WO2010/137372 WO 20101202
  • Main IPC: G02F1/1335
  • IPC: G02F1/1335
Liquid crystal display device
Abstract:
The present invention provides an LCD device that can be easily produced and has a high contrast ratio in a wide viewing angle range. The LCD device includes in the following order: a first polarizer; a first birefringent layer (II); a first quarter-wave plate; a liquid crystal cell; a second quarter-wave plate having an Nz coefficient substantially equal to that of the first quarter-wave plate; a second birefringent layer (II) having an Nz coefficient and an in-plane retardation that are substantially equal to an Nz coefficient and an in-plane retardation of the first birefringent layer (II), respectively; and a second polarizer, wherein the device includes at least one birefringent layer (III) disposed at least one of: between the first birefringent layer (I) and the liquid crystal cell; and between the liquid crystal cell and the second birefringent layer (I).
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