Patent ID: 9316780
Filing Date: 2016-04-19
CPC Classification: G02B

Claim Text:
1. A lighting assembly, comprising: a plurality of solid-state light emitters; a light guide comprising a light input edge adjacent the light emitters, a first major surface and a second major surface opposite the first major surface, a first set of optical elements of well-defined shape positioned at one of the major surfaces, and a second set of optical elements of well-defined shape positioned at one of the major surfaces, wherein light from the light emitters propagates in the light guide by total internal reflection at the major surfaces, light output from the lighting assembly by the first set of optical elements has a first light ray angle distribution and light output from the lighting assembly by the second set of optical elements has a second light ray angle distribution, the light emitters being arrayed along the light input edge in a transverse direction, and a measurement plane being defined to be perpendicular to the transverse direction and to the first major surface or the second major surface of the light guide; wherein: the first light ray angle distribution in the measurement plane is significantly narrower than an omnidirectional output distribution and the second light ray angle distribution in the measurement plane is significantly narrower than an omnidirectional output distribution; a peak of the second light ray angle distribution in the measurement plane is displaced from a peak of the first light ray angle distribution in the measurement plane; each of the optical elements of the first set comprises a first leading surface and a first trailing surface, the first leading surface and the first trailing surface forming a first included angle; each of the optical elements of the second set comprises a second leading surface and a second trailing surface, the second leading surface and the second trailing surface forming a second included angle; and the first included angle differs from the second included angle.