Title:
凹型半透過反射器を備えた光再利用空洞を有する直接照射型バックライト
Document Type and Number:
Japanese Patent JP2009506499
Kind Code:
A
Abstract:
Direct-lit backlights and associated methods and components are disclosed in which a transflector that partially transmits and partially reflects incident light is shaped to form at least one concave structure facing a back reflector of the backlight. This provides at least one recycling cavity therebetween, the at least one recycling cavity substantially filling the output area of the backlight. At least one light source is disposed behind the output area to inject light into each cavity, and can be positioned in the recycling cavity or behind an aperture in the back reflector. The cavities are preferably shallow and wide, having a width-to-depth ratio of at least 5 or 10, and can provide uniform brightness and color at the output area with sparsely distributed light sources and in a thin profile backlight.
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Inventors:
Thompson, Dee. Scott
Charts, Craig Earl.
Ostry, Brian W.
Keenitz, Scott Jay.
Wheatley, John A.
Charts, Craig Earl.
Ostry, Brian W.
Keenitz, Scott Jay.
Wheatley, John A.
Application Number:
JP2008527939A
Publication Date:
February 12, 2009
Filing Date:
August 04, 2006
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES COMPANY
International Classes:
F21S2/00; F21S8/04; F21V7/00; G02B5/08; G02B5/30; G02F1/1335; G02F1/13357; F21Y101/02
Domestic Patent References:
| JP2005071733A | 2005-03-17 | |||
| JP2003123526A | 2003-04-25 | |||
| JP2004233828A | 2004-08-19 | |||
| JP2004333520A | 2004-11-25 |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Niwa Masataka
Hirose Shigeki
Yoshimitsu Mizumoto
Jun Tsuruta
Tetsuro Shimada
Niwa Masataka
Hirose Shigeki
Yoshimitsu Mizumoto