Patent ID: 8876355

Claim:
A light guide, comprising: an incident surface configured to receive light from a plurality of light-emitting elements arranged at least along a first direction; an emitting surface configured to output diffused light; a reflecting surface positioned to receive the incident light and reflect the incident light toward the emitting surface; the reflecting surface including a plurality of lenses arranged in a two-dimensional matrix, the lenses shaped to have radii of curvature at least in the first direction and in a second direction orthogonal to the first direction and to have non-zero optical power in the first and second directions; a bottom surface coupled between the incident surface and the reflecting surface and coupled to be opposed to the emitting surface; and a light guide section including the incident surface, the emitting surface, the reflecting surface, and the bottom surface, and configured to guide the light received via the incident surface to the plurality of lenses of the reflecting surface and thence to the emitting surface.