Patent ID: 7410287
Filing Date: 2008-08-12
Classification: G02B

Abstract:
1. A backlight device comprising: a light source; a light guide plate including a light incident surface for receiving light emitting from the light source, and a light emitting surface for emitting light therefrom; a light diffusion structure arranged over the light emitting surface of the light guide plate, the light diffusion structure having a first transparent plate, a first optical film and a plurality of first bumps, the first bumps being formed on the first transparent plate and extending outwardly toward the light emitting surface, the first transparent plate being configured for supporting the first optical film; and a brightness enhancement structure arranged over the light diffusion structure, the brightness enhancement structure having a second transparent plate, a second optical film and a plurality of second bumps, the second bumps being formed on the second transparent plate and extending outwardly away from the light diffusion structure, the second transparent plate being configured for supporting the second optical film.