Patent ID: 8289476

Claim:
A substrate structure usable in a display device, comprising: a first substrate and a second substrate having a liquid crystal layer therebetween; a light blocking member formed on an internal surface of at least one of the first and second substrates; and a light refracting member formed on at least one of outer surfaces of the first and second substrates not facing the other substrate so as to correspond to the light blocking member, such that light impinging on the at least one of outer surfaces of the first and second substrates from a light source is refracted through the at least one of outer surfaces away from the light blocking member, wherein the light refracting member includes at least one of a wedge-shaped groove, a wedge-shaped protrusion, a cylindrical groove and a cylindrical protrusion, wherein the light refracting member extends in a length direction of the light blocking member and is overlapped with the light blocking member, and wherein the light incident from a back light unit onto the light blocking member towards a pixel region of a liquid crystal display panel is refracted by the light refracting member, and in the pixel region of the liquid crystal display panel, the light incident from the back light unit is not transmitted into the light refracting member but is transmitted into the first substrate.