Patent ID: 8556487

Claim:
A backlight module comprising: a light guiding plate comprising a light input surface, a light output surface and two opposite side surfaces, the light input surface being adjacent and perpendicular to the light output surface, the two opposite side surfaces being adjacent and perpendicular to the light input surface and the light output surface; a light source facing the light input surface of the light guiding plate, the light source comprising a plurality of LEDs, some LEDs emitting light with a first wavelength, and other LEDs emitting light with a second-wavelength different from the first wavelength, the first wavelength light mixing with the second wavelength light and obtaining white light; and a complementary color element located at an outside of one of the side surfaces of the light guiding plate and adjacent to the light source, the complementary color element converting the light with the first wavelength emitted from a corresponding adjacent, outmost LED into white light, the white light being reflected by the complementary color element and emitting from the light guiding plate through the light output surface of the light guiding plate; wherein the complementary color element comprises a plurality of complementary color zones each being configured for complementing a color of light generated by a corresponding adjacent, outmost LED, the zones comprising a first zone and a second zone different from the first zone.