Patent ID: 9543482
Date: 2017-01-10
CPC Classifications: H01L

Claim:
1. A light emitting diode (LED) package comprising: a blue LED chip, the blue LED chip comprising a top surface, a bottom surface opposite to the top surface, and a sidewall surface perpendicular to the top surface and bottom surface, the longitudinal section of the blue LED chip is rectangular; a first electrode and a second electrode; and a phosphor layer, the phosphor layer covering an outer periphery of the top surface and sidewall surface of the blue LED chip, wherein the phosphor layer comprises a mixture of yellow fluorescent powder and glue; wherein the phosphor layer includes a main portion corresponding to the top surface of the blue LED chip and an extended portion corresponding to the sidewall surface of the blue LED chip and extending perpendicularly away from the bottom of each sidewall surface of the blue LED chip to define a periphery of the extended portion, wherein an outer surface of the extended portion connected between the main portion and the periphery of the extended portion forms a concave surface adjacent to the sidewall surface of the blue LED chip with an arc-shaped cross-section, wherein at an end adjacent to the main portion, the concave surface intersects at a substantially perpendicular angle to the main portion, and wherein at the other end corresponding to the periphery of the extended portion, the concave surface extends along a substantially perpendicular direction from the sidewall surface of the blue LED chip, wherein the average thickness of the extended portion along the periphery of the extended portion is greater than the thickness of the main portion.