The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 2021
Filed:
Apr. 03, 2019
Nanopath, Inc., Leominster, MA (US);
Kevin Donahue, Harvard, MA (US);
NANOPATH, INC., Leominster, MA (US);
Abstract
A one-way see-through illumination device includes a light guide, a light source at an edge of the light guide and a pattern of pixels on a surface of the light guide. The light guide has an illumination surface and a non-illumination surface opposite to the illumination surface. The light source is configured to inject light into the edge of the light guide. The pattern of pixels and the light guide are arranged to generate transparent illumination by the frustration of total internal reflection of light injected into the light guide such that light from the light source is emitted through the illumination surface. The pixels are arranged to prevent the generation of a diffraction grating in the light guide.