Abstract: A direct type backlight module with a diffuser plate and its manufacturing method for application to an LCD TV is provided. The diffuser plate has a plurality of columnar lenticular lens surfaces for scattering incident light to increase its light uniformity and reducing the quantity of light dispersant in the diffuser plate in the range of from 30% to 50% to increase light transmission ratio. Through the use of vertical or horizontal lenticular lenses of at least one columnar lenticular lens surface the diffusion degree in every direction is adjusted.

Abstract: A rear projection screen includes a first optical component and a second optical component adjacent to the first optical component. In this case, the second component has a first surface and a second surface opposite to the first surface, and a plurality of cylindrical convex portions are respectively formed on both surfaces. A plurality of concave portions corresponding to the cylindrical convex portions of the first surface are respectively formed between the cylindrical convex portions of the second surface. A light absorbing material is applied to each concave part. Furthermore, the invention also provides an optical component used in the rear projection screen and a method for manufacturing the optical component.