Patent ID: 9104067
Filing Date: 2015-08-11
Classification: G02F

Abstract:
1. A backlight module, comprising a backplane, and an optical film arranged on the backplane; said optical film is provided with a convex lug for positioning, said convex lug is provided with a root and an expanded part which is outwards extended, and the width of said expanded part is more than that of said root; the side wall of said backplane is provided with a first protrusion which is provided with an opening, the root of the convex lug of said optical film is contained in the opening, the side wall of said backplane is further provided with two second protrusions each of which is provided with an extension part, and the expanded part of the convex lug of said optical film is contained below the extension part of each second protrusion; said backplane is made of metal material, and the first protrusion and the two second protrusions are integrally punch formed together with the backplane; the root of the convex lug of said optical film corresponds to the shape of the opening of the first protrusion of said backplane, the inside surface of the expanded part of the convex lug is matched with the outside surface of the first protrusion, the convex lug of said optical film is positioned on one side of said optical film, and the expanded part of the convex lug is extended to both sides in the direction parallel to the side; said two second protrusions are positioned on both sides of the expanded part of the convex lug, and the distance between the two second protrusions is less than the length of the expanded part of the convex lug; the convex lug of said optical film is in a trapezoid shape, the extension part of each second protrusion of said backplane is further provided with a chamfer for facilitating the expanded part of the convex lug of the optical film to enter, a groove is further provided below the extension part of each second protrusion of said backplane, the bottom of the groove is lower than that of the opening of the first protrusion, and the width of the groove is more than or equal to that of the expanded part of the convex lug of the optical film.