REFLECTIVE ILLUMINATION SYSTEMS FOR OPTICALLY WIDENED PERCEPTION

    公开(公告)号:EP3323006A1

    公开(公告)日:2018-05-23

    申请号:EP15749716.5

    申请日:2015-07-15

    申请人: CoeLux S.r.l.

    IPC分类号: G02B5/02 G02B5/08

    摘要: In an aspect, an illumination system (100) is disclosed to comprise a light source (102) configured to generate a light beam (103), and a chromatic reflective unit (1) for being illuminated by the light beam (103). The chromatic reflective unit (1) comprises a plurality of non-coplanar reflective surface sections (3′), and a chromatic diffusing layer (5) comprises a plurality of nanoparticles (37) embedded in a matrix (39), wherein the chromatic diffusing layer (5) is provided upstream of the plurality of reflective surface sections (3′) such that at least a portion of the light beam (103) passes through the chromatic diffusing layer (5) before and after being reflected by the plurality of non-coplanar reflective surface sections (3′). Chromatic diffusing layer (5) is further configured to provide for—together with non-coplanar reflective surface sections (3′)—a specular reflectance that is larger in the red than in the blue and for a diffuse reflectance that is larger in the blue than in the red.

    METHODS AND APPARATUS FOR TRANSPARENT DISPLAY USING SCATTERING NANOPARTICLES
    6.
    发明授权
    METHODS AND APPARATUS FOR TRANSPARENT DISPLAY USING SCATTERING NANOPARTICLES 有权
    使用散射纳米颗粒的透明显示的方法和设备

    公开(公告)号:EP2929522B1

    公开(公告)日:2018-04-25

    申请号:EP13870062.0

    申请日:2013-12-30

    IPC分类号: G09F9/00 G02B27/22

    摘要: Transparent displays enable many usefiil applications, including heads-up displays for cars and aircraft as well as displays on eyeglasses and glass windows. Unfortunately, transparent displays made of organic light-emitting diodes are typically expensive and opaque. Heads-up displays often require fixed light sources and have limited viewing angles. And transparent displays that use frequency conversion are typically energy inefficient. Conversely, the present transparent displays operate by scattering visible light from resonant nanoparticles with narrowband scattering cross sections and small absorption cross sections. More specifically, projecting an image onto a transparent screen doped with nanoparticles that selectively scatter light at the image wavelength(s) yields an image on the screen visible to an observer. Because the nanoparticles scatter light at only certain wavelengths, the screen is practically transparent under ambient light. Exemplary transparent scattering displays can be simple, inexpensive, scalable to large sizes, viewable over wide angular ranges, energy efficient, and transparent simultaneously.