Illumination device having viscoelastic layer

摘要

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

主权项

1. An illumination device comprising:
a light source; and an optical article comprising:
a lightguide,a viscoelastic layer disposed on the lightguide, anda nanovoided polymeric layer disposed on the viscoelastic layer opposite the lightguide, the nanovoided polymeric layer comprising a plurality of interconnected nanovoids, at least some of the interconnected nanovoids connected to one another by hollow passages, wherein the light source is optically coupled to the lightguide such that light emitted by the light source enters the lightguide and is transported within the lightguide by total internal reflection.