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:
Jan. 04, 2022
Filed:
Jan. 25, 2017
Bodle Technologies Limited, Oxford, GB;
BODLE TECHNOLOGIES LIMITED, Oxford, GB;
Abstract
The present invention is notably directed to an optical device () comprising a layer structure () with: a thermally conducting, optical reflector (); a thermally conducting spacer (), which is transmissive to light and arranged above the reflector (); and a phase change material (), or PCM, arranged above the spacer () and having at least two reversibly switchable states, in which the PCM exhibits two different values of refractive index. The reflector (), the spacer () and the PCM () are successively stacked along a stacking direction (z) of the layer structure. The optical device further comprises: a heating element (), opposite to the PCM () with respect to the reflector (), the layer structure () being configured so as to electrically insulate the PCM () from the heating element (), while the heating element () is in thermal communication with the PCM () via the reflector () and the spacer (); and a controller () configured to energize the heating element (), so as to heat the PCM () and thereby reversibly change a refractive index and/or an absorption of said PCM (). The invention is further directed to related optical devices (notably devices comprising one or more pixels formed, each, by a set of layer structures such as described above) and actuation methods.