Patent ID: 7824066

Claim:
A backlight assembly comprising: a light source unit for emitting light; a prism member through which light emitted from the light source unit passes; and a supporting member for supporting the light source unit and the prism member in overlaying relationship, wherein the prism member includes a plate-type body portion having a predetermined thickness, and a plurality of unit light-concentrating portions formed on at least one surface of the body portion and arranged along a first direction and in a second direction crossing the first direction, wherein the first direction is a length direction of the plurality of unit light-concentrating portions and the second direction is a width direction of the plurality of unit light-concentrating portions, wherein adjacent ones of the plurality of unit light-concentrating portions arranged along the first direction are spaced apart with one of a plurality of non-light-concentrating regions formed therebetween, and wherein the plurality of unit light-concentrating portions on a straight line along the first direction have irregular lengths.