Patent ID: 7080933

Claim:
A BLU and a module using the BLU for backlighting a display, the module comprising: a plurality of BLUs assembled together for collectively backlighting the display, wherein each of the BLUs comprises: a light guide, the light guide being wedge-like and having a light-emitting surface arranged on a top thereof and a bottom surface opposing the light-emitting surface, the light-emitting surface being larger than the bottom surface to define first and second cavity spaces on opposing sides of the bottom surface; a light source structure adjacent to a side of the light guide and received in the first cavity; and a heat conduction member contacting the light source structure, the heat conduction member being disposed at a side of the light source structure opposite the light guide; wherein the respective light guides in at least one adjacent pair of BLUs capture therebetween a light source and heat condition member pair, the captured heat conduction member extending into the second cavity space of one of the adjacent BLU light guides; and, wherein the light-emitting surfaces of the light guides in the adjacent BLUs contacts tightly; whereby the module is variable in size responsive to varying numbers of the BLUs being assembled together.