Patent ID: 7309881

Claim:
A wavelength-converting LED, comprising: an exciting element configured to emit one of a blue light having an exciting wavelength and an ultraviolet light having an exciting wavelength; a fluorescent material located adjacent the exciting element and having a mean particle diameter ranging from 5 μm to 20 μm, the fluorescent material being capable of converting at least part of said light emitted from said exciting element into a light having a wavelength that is longer than said exciting wavelength; a dispersing agent located adjacent the exciting element and having a mean particle diameter that is not less than 1/10 (one tenth) of said mean particle diameter of said fluorescent material; and a binder base material being arranged to include said fluorescent material, said dispersing agent and a binder therein, wherein a sum of the weights of said fluorescent material and said dispersing agent is in the range of 20% to 60% by weight of said binder base material.