| 发明名称 |
ILLUMINATION SYSTEMS WITH SLOPED TRANSMISSION SPECTRUM FRONT REFLECTOR |
| 摘要 |
A backlight (10) includes a front and back reflectors (12,14) forming a light recycling cavity (16) and one or more light source members (24a, 24b, 24c) disposed to emit light into the light recycling cavity. The front reflector (12) being partially reflective to provide an output illumination area. The front reflector (12) has a blue sloped transmission spectra, at normal incidence with a range among bin values from 15% to 100%. |
| 申请公布号 |
US2014254125(A1) |
申请公布日期 |
2014.09.11 |
| 申请号 |
US201214352860 |
申请日期 |
2012.10.17 |
| 申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
Nevitt Timothy J.;Weber Michael F.;Wheatley John A.;Sousa Matthew E.;Liu Tao |
| 分类号 |
F21V7/04;G02F1/1335;F21V13/08 |
主分类号 |
F21V7/04 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A backlight comprising:
a front and back reflector forming a light recycling cavity, the front reflector being partially reflective to provide an output illumination area; and one or more light sources disposed to emit light into the light recycling cavity; wherein the front reflector has a hemispherical reflectivity for unpolarized visible light of Rfhemi, and the back reflector has a hemispherical reflectivity for unpolarized visible light of Rbhemi, and Rfhemi*Rbhemi is at least 0.65; and wherein the front reflector has a sloped transmission spectra at a view angle of interest Ω, and a backlight intensity spectrum:
T(Ω,λ)/{1−Rbhemi(λ)*RfHemi(λ)} is substantially neutral across a visible wavelength band. |
| 地址 |
St. Paul MN US |
