Patent ID: 8421336

Claim:
An LED device, comprising: at least one LED; a first porous material layer, disposed on the LED, the first porous material layer being formed with a plurality of first pillar-shaped pores, the first pillar-shaped pores being periodically arranged parallel to a surface of LED; a plurality of first nanocrystals, uniformly filled in the first pillar-shaped pores to construct a first phosphor layer on the LED, wherein a grain size of each of the first nanocrystals is smaller than an aperture of each of the first pillar-shaped pores; a substrate having a plurality of trenches concavely formed on a top surface thereof; a plurality of the LEDs respectively disposed in each of the trenches; and a plurality of first transparent material layers respectively filled in the trenches, wherein the first transparent material layers are disposed between the LEDs and the first porous material layer.