Lightguide device with outcoupling structures
View Patent ↗A lightguide assembly including structures to provide for outcoupling of light from an internal reflection structure. In an embodiment, a lightguide assembly includes light transmissive bodies forming respective corrugations which are coupled to one another. Optical coatings are variously disposed between the respective corrugations, wherein the optical coatings provide for redirection of light from the lightguide assembly. In another embodiment, optical coatings are each applied to a respective one of alternate facets of a corrugation. Polymer film portions provide mechanical support for the optical coatings during application to the corrugation.
1. A method comprising:
bonding a first body for a lightguide assembly to a second body for the lightguide assembly, the first body including a first light transmissive material which forms a first corrugation comprising a first plurality of facets, the second body including a second light transmissive material which forms a second corrugation; and
prior to the bonding, applying to each of the first plurality of facets a respective optical coating of a plurality of optical coatings by applying an optical coating material to a side of a component framework that is to provide a plurality of component blocks used in formation of the first body;
after the optical coating material is applied to the side of the component framework, forming the first body, including:
forming the plurality of component blocks each from a respective portion of the component framework, wherein the plurality of component blocks each forms a respective portion of the first corrugation; and
bonding the plurality of component blocks to one another; and
wherein after the bonding, the plurality of optical coatings are disposed between the first corrugation and the second corrugation, wherein for each optical coating of the plurality of optical coatings:
the optical coating extends across a surface of a respective one of the first plurality of facets, wherein, within a cross-section of the lightguide assembly, the optical coating is separated from another of the plurality of optical coatings.
2. The method of claim 1 , wherein applying to each of the first plurality of facets a respective optical coating of the plurality of optical coatings includes:
disposing an optical coating material to a polymer film;
disposing the polymer film on a transfer sheet;
forming laminates each including a respective portion of the optical coating material and a respective portion of the polymer film; and
bonding the laminates each to a respective one of the first plurality of facets.
3. The method of claim 2 , wherein forming the laminates includes removing portions of the optical coating material and portions of the polymer film from the transfer sheet.
4. The method of claim 2 , wherein forming the laminates includes dicing the transfer sheet.