Patent ID: 8827531

Claim:
A lighting assembly, comprising: a light guide having opposed major surfaces between which light propagates by total internal reflection, and side surfaces extending between the major surfaces; and a light source at an apex region between two of the side surfaces of the light guide, the light source configured to input light to the light guide, wherein: the side surfaces comprise a stepped reflective side surface extending from the apex region, and an output side surface extending from the apex region; the stepped reflective side surface comprises a first reflective step closer to the apex region and a second reflective step further from the apex region; the output side surface comprises a first output region closer to the apex region and a second output region further from the apex region; the first reflective step of the stepped reflective side surface is configured to reflect a first portion of the light input to the light guide from the light source through the first output region of the output side surface; the second reflective step of the stepped reflective side surface is configured to reflect a second portion of the light input to the light guide from the light source through the second output region of the output side surface at a larger output angle relative to the output side surface than the light output through the first output region of the output side surface; and the second output region of the output side surface comprises segments oriented nominally normal to the reflected second portion of the light incident thereon.