LGP pattern design with single LED light source

We investigated optimize pattern design of a LGP for TFT-LCD with single LED. For the purpose, we introduced new concepts of pattern design most appropriate design for single light source, density adjustment design and radius adjustment design. And than compared the LGP output intensity distribution of the two cases with that of the uniform density pattern. As the result, above two types pattern design given a good result. Especially, the radius adjustment pattern design enhanced intensity uniformity definitely.