Patent ID: 8840297

Claim:
A back-light module configured below a liquid crystal display (LCD) panel, the back-light module comprising: a light guide plate comprising a top-emitting surface, a bottom surface opposite to the top-emitting surface, and a side surface connecting the top-emitting surface and the bottom surface, wherein the light guide plate comprises at least one indentation, the indentation comprises a first light-incident sidewall and a pair of second light-incident sidewalls, the pair of second light-incident sidewalls are respectively located on two opposite sides of the first light-incident sidewall and adjacent to the first light-incident sidewall, and normal vectors of the second light-incident sidewalls and the first light-incident sidewall are not parallel; a plurality of first light-emitting devices located in the indentation, wherein a first light beam propagating toward the first light-incident sidewall is emitted from a light-emitting surface of each of the first light-emitting devices; a plurality of second light-emitting devices, located in the indentation, wherein a second light beam propagating toward one of the second light-incident sidewalls is emitted from each of the second light-emitting devices; and a pair slanted of sidewalls respectively located on two opposite sides of the indentation, each of the slanted sidewalls is adjacent to and directly connected with one of the second light-incident sidewalls and the side surface respectively, and an included angle between each of the slanted sidewalls and the corresponding second light-incident sidewall is substantially equal to γ, and γ<90°.