Illumination device having viscoelastic lightguide

摘要

An illumination device, such as a backlight for electronic display devices, is disclosed. The illumination device includes a viscoelastic lightguide optically coupled to a light source, and a nanovoided polymeric layer is used in conjunction with the lightguide to manage light emitted by the light source. The viscoelastic lightguide may be a pressure sensitive adhesive.

主权项

1. An illumination device comprising:
an optical article comprising:
a nanovoided polymeric layer disposed between a viscoelastic lightguide and a substrate, the nanovoided polymeric layer comprising a plurality of interconnected nanovoids,a first interface formed between the nanovoided polymeric layer and the viscoelastic lightguide, the first interface comprising a plurality of first features, anda second interface formed between the nanovoided polymeric layer and the substrate, the second interface comprising a plurality of second features; and a light source optically coupled to the viscoelastic lightguide such that light emitted by the light source enters the viscoelastic lightguide and is transported within the lightguide by total internal reflection.