Patent ID: 8633505

Claim:
A light source, comprising: a light guiding plate comprising a light incident surface; and a plurality of LEDs arranged adjacent to the light incident surface, each LED comprising: an LED chip; a first package configured for packaging the LED chip, the first package comprising a flat first surface; and a second package configured for packaging the first package, the second package comprising a planar second surface substantially parallel to the first surface, and an outer surface, wherein a micro-structure is formed at the second surface and protrudes from the second surface toward the first surface, a gap is maintained between the first and second surfaces, the gap is filled with a filler, and a refractive index of the filler is smaller than that of the first and second packages; wherein each LED is capable of allowing light generated by the LED chip to penetrate the first surface of the first package, then to enter the filled gap, and then to pass through the micro-structure and the second surface to enter the second package, and finally to exit from the outer surface of the second package.