Patent ID: 7708446

Claim:
A backlight display system, comprising: a light source; a first film comprising a first surface texture layer that is formed of a first material of a first refractive index; and a second film comprising a second surface texture layer that is formed of a second material of a second refractive index, wherein the second film is disposed between the light source and the first film; wherein the second refractive index is greater than the first refractive index; wherein the light source is disposed in optical communication with the first film and the second film; and wherein the first surface texture layer comprises unit structures selected from the group consisting of hemispherical structures, partial hemispherical structures, ellipsoidal structures, immersed spherical beads, ellipsoidal beads, “bell-shape” bump and complex lens shape structures; and wherein the second surface texture layer comprises unit structures selected from the group consisting of hemispherical structures, partial hemispherical structures, ellipsoidal structures, immersed spherical beads, ellipsoidal beads, “bell-shape” bump and complex lens shape structures.