公开(公告)号：US20190339522A1

公开(公告)日：2019-11-07

申请号：US15935132

申请日：2018-03-26

Applicant: Massachusetts Institute of Technology

Inventor： Chia Wei Hsu ,  Wenjun Qiu ,  Bo Zhen ,  Ofer Shapira ,  Marin Soljacic

IPC: G02B27/01 ,  G02F1/01 ,  F21V9/08 ,  G09F13/00 ,  F21V9/12 ,  G02F1/19 ,  G03B21/62 ,  G02B5/02

Abstract: Transparent displays enable many useful 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.

公开(公告)号：US09677741B2

公开(公告)日：2017-06-13

申请号：US15090348

申请日：2016-04-04

Applicant: Massachusetts Institute of Technology

Inventor： Chia Wei Hsu ,  Wenjun Qiu ,  Bo Zhen ,  Ofer Shapira ,  Marin Soljacic

IPC: F21V9/12 ,  F21V9/08 ,  G09F13/00 ,  G02F1/01 ,  G02F1/19 ,  G02B5/02 ,  G03B21/62 ,  B82Y20/00

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: Transparent displays enable many useful 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.