Patent attributes
An edge-illuminating light guide device works with a consumer electronic to provide directional lighting to efficiently emit illumination from the sides of a screen, while maximizing light emission and minimizing power usage. The device utilizes two light guides that join to direct light from a light source across a directional path from the sides of the device. An ingress light guide has a flat, triangular shape that tapers from a narrow light inlet end to a wide light outlet end. The narrow light inlet end connects to a light source. An egress light guide is defined by a flat, rectangular shape. The egress light guide integrally joins with, and is in illuminating communication with the ingress light guide. A composition coats one of the faces of the egress light guide to prevent passage of the light; thereby serving as a color filter. The device is fabricated from a polycarbonate.