Invention Grant
US07804650B2 Lens sheet for use in backlight, backlight and display device using the same 有权
用于背光,背光和使用其的显示装置的透镜片

  • Patent Title: Lens sheet for use in backlight, backlight and display device using the same
  • Patent Title (中): 用于背光,背光和使用其的显示装置的透镜片
  • Application No.: US12067281
    Application Date: 2007-04-18
  • Publication No.: US07804650B2
    Publication Date: 2010-09-28
  • Inventor: Yukinori Yamada
  • Applicant: Yukinori Yamada
  • Applicant Address: JP Ibaraki-shi, Osaka
  • Assignee: Hitachi Maxell, Ltd.
  • Current Assignee: Hitachi Maxell, Ltd.
  • Current Assignee Address: JP Ibaraki-shi, Osaka
  • Agency: Birch, Stewart, Kolasch & Birch, LLP
  • Priority: JP2006-126839 20060428
  • International Application: PCT/JP2007/058454 WO 20070418
  • International Announcement: WO2007/125803 WO 20071108
  • Main IPC: G02B27/10
  • IPC: G02B27/10 G03B21/60
Lens sheet for use in backlight, backlight and display device using the same
Abstract:
A lens sheet according to the invention includes a base film, a lenticular lens resin layer, a prism resin layer, and a filling resin layer. The lenticular lens resin layer includes a plurality of cylindrical lenses formed on one surface of the base film and arranged. The prism resin layer includes a plurality of prisms formed on the other surface of the base film and arranged, and has a lower refractive index than the refractive index of the base film. The filling resin layer is filled on a surface of the prism resin layer provided with the arranged prisms and has a higher refractive index than the refractive index of the prism resin layer. Therefore, the lens sheet according to the invention can restrain side lobe light emitted obliquely to the front surface.
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