Patent ID: 7591578

Claim:
An edge type backlight module comprising: a diffusion plate; at least one lamp-fixing unit disposed under one edge of the diffusion plate, wherein the at least one lamp-fixing unit is a sidewall having an inner surface facing an inner area underneath the diffusion plate, an outer surface opposite to the inner surface, and a plurality of fin structures defined on the outer surface; at least one light source fixed on the inner surface of the at least one lamp-fixing unit; and a reflective plate disposed adjacent the lamp-fixing unit and under the diffusion plate, wherein the reflective plate is a curved sheet bending toward the diffusion plate and the at least one light source; the fin structures are aligned on the outer surface of the lamp-fixing unit from the edge of the diffusion plate to an end of the reflective plate, and light rays emitted from the at least one light source are uniformly reflected toward the diffusion plate by the reflective plate, wherein the at least one lamp-fixing unit further comprises an upper reflective portion, the upper reflective portion having a first protruding wall extending substantially perpendicularly from a top of the inner surface of the at least one lamp-fixing unit towards an inner area of the diffusion plate and a second protruding wall extending from an interior portion of the first protruding wall towards a bottom portion of the inner surface of the at least one lamp-fixing unit, the second protruding wall having a first side surface facing the inner surface of the at least one lamp-fixing unit, and a second side surface facing away from the first side surface; the second side surface and the first protruding wall cooperatively forming a second curved reflective surface facing the reflective plate.