Aluminum extrusion heat sink structure and corresponding backlight module

An aluminum extrusion heat sink structure, comprising:

• a light source connecting portion connected with a light emitting diode (LED) light source;
• a back plate connecting portion connected with the light source connecting portion and has a surface contact with a back plate;
• and
• a light guide plate support portion which is forward to a direction of the light guide plate, projects from the back plate connecting portion, is used to support the light guide plate, and comprises:
• a contact member which is used to support the light guide plate, and has a surface contact with the light guide plate;
• and
• a support member which is used to connect with the contact member and the back plate connecting portion;
• wherein the light guide plate support portion is formed as a hollow trapezoid;
• wherein a contact area between the contact member of the light guide plate support portion and the light guide plate is larger than a horizontal cross section area of the support member of the light guide plate support portion, and the horizontal cross section of the support member is parallel to a light-out plane of the light guide plate;
• and
• wherein a plurality of fin heat dissipation units is disposed on the contact member of the light guide plate support portion, and the fin heat dissipation units contact with the light guide plate;
• and
• wherein the light source connecting portion, the back plate connecting portion and the light guide plate support portion are formed as a single aluminum extrusion heat sink structure which is disposed on and separated from the back plate.