Patent ID: 9052544
Filing Date: 2015-06-09
Classification: G02F

Abstract:
1. A direct-light backlight module, comprising: at least two light sources; a diffuser plate, disposed above said light sources; a reflection plate, disposed beneath said light sources; and an optical film, disposed on top of said diffuser plate, further comprising two first areas without via holes disposed therein, a second area between and immediately connected with said two first areas and a plurality of via holes; said two first areas each disposed directly above a corresponding one of two neighboring said light sources, said second area disposed between said two neighboring light sources, and said plurality of via holes disposed in said second area of said optical film; said plurality of via holes being uniformly distributed and diameter of via hole increasing as distance to said light sources increases; or, diameters of via holes staying the same, but distribution density of via holes increasing as distance to said light sources increases; or, both diameters of via holes and distribution density of via holes increasing as distance to said light sources increases; wherein said optical film further comprising a diffuser film and two prism lenses, said diffuser film being disposed between two said prism lenses and said diffuser plate, or two said prism lenses being disposed between said diffuser film and said diffuser plate; and cross-sections of surfaces of said two prism lenses consists of a plurality of connected zigzag shapes or a plurality of connected semicircles.