Heat sink and backlight module using same

摘要

The present invention provides a heat sink and a backlight module using the heat sink. The heat sink includes a first bottom plate, a first side plate formed on the first bottom plate, and a second bottom plate mounted on the first bottom plate. The first bottom plate and the first side plate are integrally formed together. The second bottom plate is fixed by screws to an end of the first bottom plate that is distant from the first side plate. The first bottom plate is made of aluminum extrusion material. The second bottom plate is made of aluminum sheet material. The bottom plate of the heat sink is formed through jointing so that a portion of the bottom plate is made of aluminum sheet material that has a small thickness to thereby reduce the amount of aluminum material used and thus facilitating cost control.

主权项

1. A heat sink, comprising a first bottom plate, a first side plate formed on the first bottom plate, and a second bottom plate mounted on the first bottom plate, the first bottom plate and the first side plate being integrally formed together, the second bottom plate comprising a flat plate portion from which an edge portion extends flatly to be positioned on and fixed by screws to an end of the first bottom plate that is distant from the first side plate so that the second bottom plate is supported on the first bottom plate in such a way that the edge portion contacts and is shielded by the end of the first bottom plate and the flat plate portion of the second bottom plate is away from and completely outside the end of the first bottom plate for contacting air without being shielded so as to help dissipate heat therefrom to the outside, the first bottom plate being made of aluminum extrusion material and having an outside surface on which a radiation heat dissipation material that is different from the aluminum extrusion material of the first bottom plate is formed and attached thereto so as to help dissipate heat from the first bottom plate to the outside, the second bottom plate being made of aluminum sheet material.