公开(公告)号：WO2014107425A1

公开(公告)日：2014-07-10

申请号：PCT/US2013/078233

申请日：2013-12-30

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： HSU, Chia, Wei ,  QIU, Wenjun ,  ZHEN, Bo ,  SHAPIRA, Ofer ,  SOLJAIC, Marin

IPC: G09F9/00 ,  G02B27/22 ,  H04N13/04

CPC classification number: G02B27/01 ,  G02B5/0242 ,  G02B2207/101 ,  G02F1/0126 ,  G02F1/19 ,  G02F1/23 ,  G03B21/62 ,  G03B35/26 ,  H04N13/337

Abstract: 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.

Abstract translation: 透明显示屏可以实现许多用途应用，包括汽车和飞机的单机显示器以及眼镜和玻璃窗上的显示器。 不幸的是，由有机发光二极管制成的透明显示器通常是昂贵且不透明的。 头戴式显示器通常需要固定光源并具有有限的视角。 而使用频率转换的透明显示器通常是无效率的。 相反，本发明的透明显示器通过从具有窄带散射截面和小的吸收截面的共振纳米颗粒散射可见光来操作。 更具体地，将图像投影到掺杂有选择性地散射图像波长的光的纳米颗粒的透明屏幕上产生在观察者可见的屏幕上的图像。 因为纳米颗粒仅在某些波长处散射光，所以屏幕在环境光下实际上是透明的。 示例性的透明散射显示器可以是简单的，便宜的，可扩展的大尺寸，可在宽角度范围内观看，能量效率高，同时透明。

公开(公告)号：WO2014107426A1

公开(公告)日：2014-07-10

申请号：PCT/US2013/078234

申请日：2013-12-30

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： HSU, Chia, Wei ,  QIU, Wenjun ,  ZHEN, Bo ,  SHAPIRA, Ofer ,  SOLJACIC, Marin

IPC: G02F1/01 ,  G02B26/00

CPC classification number: G02B27/0172 ,  B82Y20/00 ,  F21V9/08 ,  F21V9/12 ,  G02B5/0242 ,  G02B5/0278 ,  G02B2027/0112 ,  G02B2027/0145 ,  G02B2027/0147 ,  G02F1/0126 ,  G02F1/19 ,  G03B21/62 ,  G09F13/00 ,  Y10S977/773

Abstract: Disclosed herein are transparent color displays with nanoparticies made with nonlinear materials and/or designed to exhibit optical resonances. These nanoparticies are embedded in or hosted on a transparent substrate, such as a flexible piece of clear plastic or acrylic. Illuminating the nanoparticies with invisible light (e.g., infrared or ultraviolet light) causes them to emit visible light. For example, a rare-earth doped nanoparticle may emit visible light when illuminated simultaneously with a first infrared beam at a first wavelength λ 1 and a second infrared beam at a second wavelength λ 2 . And a frequency-doubling nanoparticle may emit visible light when illuminated with a single infrared beam at the nanoparticle's resonant frequency. Selectively addressing these nanoparticies with appropiately selected pump beams yields visible light emitted from the nanoparticies hosted by the transparent substrate in a desired pattern.

Abstract translation: 本文公开了具有由非线性材料制成的纳米颗粒和/或被设计为呈现光学共振的透明彩色显示器。 这些纳米颗粒嵌入或托在透明基材上，例如透明塑料或丙烯酸的柔性片。 用不可见光（例如，红外或紫外光）照射纳米颗粒使它们发射可见光。 例如，当与第一波长λ1的第一红外光束和第二波长λ2的第二红外光束同时照射时，稀土掺杂的纳米颗粒可以发射可见光。 当纳米颗粒的共振频率用单个红外光束照射时，倍频纳米颗粒可能会发出可见光。 用适当选择的泵浦光束选择性地寻址这些纳米颗粒，产生由透明基板以期望的图案承载的纳米颗粒发射的可见光。