Patent ID: 9594205
Date: 2017-03-14
CPC Classifications: B29D,G02B

Claim:
1. A backlight module, comprising: a housing; a light guiding plate disposed in the housing, and the light guiding plate comprises a light entrance surface, a bottom surface, and a light exit surface, wherein the bottom surface and the light exit surface are spaced apart and disposed opposite to each other, and two opposite sides of the light entrance surface are connected to the bottom surface and the light exit surface respectively, wherein a direction parallel to the light entrance surface is defined as a horizontal direction; and a light source disposed adjacent to the light entrance surface of the light guiding plate, wherein a horizontal cross section of the light exit surface of the light guiding plate has a first curve, and a vertical cross section of the light exit surface of the light guiding plate through any peak of the first curve has a second curve, wherein adjacent peaks of the first curve have a same distance therebetween, adjacent troughs of the first curve are spaced apart by first distances and any two adjacent first distances are different from each other; and adjacent peaks of the second curve are spaced apart by second distances and any two adjacent second distances are different from each other, wherein each peak of the same second curve is located at a third distance from the bottom surface and any two adjacent third distances are different from each other.