Patent ID: 6863414

Claim:
A front light module comprising: a light guide plate having opposite ends, the light guide plate having a front surface and an opposite back surface connected to each other by the ends, a plurality of raised ridge sets formed on the front surface, each ridge set comprising a number of ridges each having opposite inclined faces, and recessed troughs being defined in the front surface between adjacent ridge sets, each trough having opposite inclined faces, wherein the front surface adjacent to the opposite ends is lower than the raised ridge sets; a light source mounted to each end of the light guide plate for projecting light into the light guide plate; and a reflector arranged adjacent to and spaced from the back surface of the light guide plate for accommodating a display board between the reflector and the light guide plate; wherein the light source is positioned lower than the raised ridge sets and the light from the light source is incident onto the inclined faces of the troughs and reflected thereby toward the reflector, the light being reflected by the reflector toward the front surface where the light is refracted by the inclined faces of the ridges to increase viewing angle of a display.