Patent ID: 7697813

Claim:
A light guide member capable of guiding light received from at least a first light source and second light source, wherein the first light source is spaced a distance D 3 from the second light source, the light guide member, comprising: a first side including a plurality of first grooves extending along a first direction and a plurality of second grooves extending along the first direction, the first grooves having a first pitch and the second grooves having a second pitch, the first pitch being different from the second pitch, wherein the first side includes a first portion and a second portion, the first grooves being formed on the first portion and the second grooves being formed on the second portion, the second portion corresponds to one or more areas extending from a first end portion of the first side of the light guide member, the second portion includes a plurality of sub-second-portions spaced apart from each other along the first side of the light guide member, at least some of the first grooves extending between the plurality of sub-second-portions, the plurality of sub-second portions correspond to a triangular shaped portion, the triangular shaped portion having a base extending a first distance D 1 along an edge of the first end portion and a height extending a second distance D 2 away from the edge of the first end portion along the second direction, and the distance D 2 is about 95% to about 105% of the first distance D 1 .