Title:
光学フィルム及びそれを用いた面光源装置
Document Type and Number:
Japanese Patent JP4240037
Kind Code:
B2
Abstract:
An optical film 10 has a transparent base film 11 made of polyethylene terephthalate (PET), a prism made of photo-curing resin such as acryl modified epoxy on an incident surface 12 that is one face of the base film 11, and a hologram similarly made of photo-curing resin on an exit surface 13 opposing the incident surface 12. The prism has grooves or ridges each having a substantially triangular cross section to totally reflect incident light so as to bend the light into a direction perpendicular to the exit surface 13. The hologram anisotropically diffuses light exiting from the exit surface 13, to improve brightness.
Inventors:
Hoshino Tetsuya
Sugimoto Yasushi
Teruo Teshima
Dobashi Tomo
Sugimoto Yasushi
Teruo Teshima
Dobashi Tomo
Application Number:
JP2005506417A
Publication Date:
March 18, 2009
Filing Date:
May 21, 2004
Export Citation:
Assignee:
Hitachi Chemical Co., Ltd.
International Classes:
G02B5/02; F21S2/00; F21V5/00; F21V5/02; F21V8/00; G02B5/32; G02F1/13357; F21Y103/00
Domestic Patent References:
| JP7270603A | ||||
| JP2003035824A | ||||
| JP11295713A | ||||
| JP2002071959A |
Attorney, Agent or Firm:
Hidekazu Miyoshi