Patent ID: 8477266

Claim:
A display backlight module adapted to an LCD device, comprising: an edge-type backlight source module, comprising: a light source; a light-guide plate coupled with the light source; a light-reflecting plate, disposed on one side of the light-guide plate, for reflecting a downward light entering the light-guide plate from the light source; a multi-layer reflective film, disposed on a light-emitting surface of the edge-type backlight source module, formed of multiple inter-stacked polymer films with difference refractive indexes, and an interference principle being incorporated to reflecting or transmitting the light with a specific wavelength range; wherein the multi-layer reflective film has a first surface and a second surface, a surface structure having a plurality of diffusing particles is formed on the first surface or the second surface; the multi-layer reflective film includes an ultraviolet reflector with additive transparent plastic particles for reflecting ultraviolet radiation; a reflective cavity being defined between the multi-layer reflective film and the light-reflecting plate, and multiple reflections, refractions, and scatterings of the light are created within the reflective cavity; and an optical film module, disposed between the edge-type backlight source module and a liquid crystal display panel, and at least one brightness-enhancement film and a diffusion film are included.