Invention Grant
US07692733B2 Surface light source capable of varying angular range for diffusing emitted light and liquid crystal display apparatus capable of displaying selectively with wide view angle and narrow view angle by using same 失效
能够改变角度范围以扩散发射光的表面光源和能够通过使用相同的方式选择性地显示宽视角和窄视角的液晶显示装置

  • Patent Title: Surface light source capable of varying angular range for diffusing emitted light and liquid crystal display apparatus capable of displaying selectively with wide view angle and narrow view angle by using same
  • Patent Title (中): 能够改变角度范围以扩散发射光的表面光源和能够通过使用相同的方式选择性地显示宽视角和窄视角的液晶显示装置
  • Application No.: US11511988
    Application Date: 2006-08-29
  • Publication No.: US07692733B2
    Publication Date: 2010-04-06
  • Inventor: Yasuhiro Daiku
  • Applicant: Yasuhiro Daiku
  • Applicant Address: JP Tokyo
  • Assignee: Casio Computer Co., Ltd.
  • Current Assignee: Casio Computer Co., Ltd.
  • Current Assignee Address: JP Tokyo
  • Agency: Frishauf, Holtz, Goodman & Chick, P.C.
  • Priority: JP2005-247727 20050829
  • Main IPC: G02F1/1335
  • IPC: G02F1/1335 F21V7/04
Surface light source capable of varying angular range for diffusing emitted light and liquid crystal display apparatus capable of displaying selectively with wide view angle and narrow view angle by using same
Abstract:
A liquid crystal display apparatus comprises first and second light emitting sections for emitting light with respective spreading angles that are different from each other and a liquid crystal display device arranged at the viewing side of the apparatus. The first light emitting section includes a first light guide plate for receiving light from a light incident end surface and diffusing it within a first angular range of spreading angle centered at the normal direction of a light emitting surface before emitting it from the light emitting surface and first light emitting elements. The second light emitting section includes a second light guide plate for receiving light from a light incident end surface and emitting it in directions within a second angular range of spreading angle smaller than the first angular range while transmitting light emitted from the first light guide plate and second light emitting elements.
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