Patent ID: 7940352
Filing Date: 2011-05-10
Classification: G02F

Abstract:
1. A manufacturing method of a light diffusion module for use with a back light module, comprising: disposing a first diffusion layer on the back light module, wherein the first diffusion layer includes a bottom light entrance surface and a top light exit surface, the first diffusion layer has a plurality of first micro structures juxtapositioned to each other, and at least a part of the first micro structures have a first width and a first height; disposing a second diffusion layer on the first diffusion layer, wherein the second diffusion layer includes a bottom surface and a top surface, the bottom surface is disposed in opposition to the top light exit surface of the first diffusion layer, the top surface has a plurality of second micro structures juxtapositioned to each other, and at least a part of the second micro structure have a second width and a second height; and adjusting a ratio of the first width to the second width between 1.1 and 1.8.