Patent ID: 7382423

Claim:
A backlight module for a liquid crystal display device, comprising: an optical film set; a housing having a bottom plate defining a through opening therein, an inward side and an outward side, wherein the inward side faces the optical film set and the outward side is opposite to the inward side; and a spacer for supporting the optical film set, the spacer being put into the through opening of the bottom plate of the backlight module from the outward side of the bottom plate, the spacer comprising a thermally conductive groove, and the spacer having: a tapered protruding portion, an intermediate portion connected to the protruding portion, and a stopper portion connected to the intermediate portion, wherein: the protruding portion is configured to contact the optical film set, the diameter of the intermediate portion is not larger than the diameter of the through opening, the intermediate portion is disposed in the through opening, the stopper portion is in the shape of plate, and all of the stopper portion is positioned outside the outward side of the bottom plate.