Patent ID: 9690038
Date: 2017-06-27
CPC Classifications: G02B,G02F,Y10T

Claim:
1. A backlight, comprising: a light source configured to generate light, the light exiting the light source having an angular exit distribution; and one or more light recycling prism films having prism peaks oriented away from the light source, the recycling films having a range of optimal incident angles that allows non-recycled light to exit from a plane of the recycling films within a desired range of output angles, and wherein one or more components of the light source are configured to preferentially shape the exit distribution of the light source to control overlap between the exit distribution of the light source and the optimal incident angle range of the recycling films, wherein the one or more components of the light source comprise a specular reflector, and the light source comprises a light guide arranged between the specular reflector and the recycling films.