Patent ID: 7281817

Claim:
A traffic light comprising: a light source comprising a circuit board on which a plurality of light-emitting diodes is mounted, the light-emitting diodes forming at least a linear array; an inner cover positioned in front of the light source, comprising a first light incidence surface facing the light-emitting diodes to receive light from the array of the light-emitting diodes and an opposite, first light emission surface forming elongate prisms inclined with respect to a predetermined axis at a predetermined angle of 65-80 degrees to project the light frontward; and a front cover positioned in front of the inner cover, comprising a second light incidence surface facing the first light emission surface of the inner cover to receive the light from the inner cover, and an opposite, second light emission surface through which the light is further projected out of the traffic light, the second light incidence surface forming a honeycomb structure comprising a plurality of hexagonal lens blocks, each hexagonal lens blocks comprising an array of individual lens segments; wherein each lens block has a first radius of curvature in horizontal direction and a second radius of curvature in vertical direction, the first radius of curvature being identical to the second radius of curvature.