Patent ID: 8830419

Claim:
A backlight module, comprising: a waveguide having an incident surface and light emitting surface, a light source being arranged on a side of the incident surface; an optical module arranged above the waveguide and facing the light-emitting surface, the optical module including at least one optical film having a crease at one side thereof; at least a positioning arrangement arranged on a side surface of the waveguide other than the incident surface, a receiving space being defined between the positioning arrangement and the side surface of the waveguide and with the crease of the optical film received within the space; wherein the positioning arrangement has generally an elongate shape, and includes a pair of anchoring portions arranged on opposite ends thereof, wherein the anchoring portions are located on the same level, and flushed to the side surface of the waveguide when attached thereto; and a bridge portion is arranged between those two anchoring portions, the receiving space being defined between the anchoring portions and the bridge portion, and the side surface of the waveguide; and wherein the anchoring portions are glued to the side surface of the waveguide.