| abstract |
A high-efficiency conversion type LED using phosphor powder for conversion of primary radiation is provided. A chip that emits primary radiation at a peak wavelength of 300 to 550 nm, and a chip that exists as a powder, absorbing at least a portion of the radiation and emitting at other wavelengths as a secondary radiation, the conversion LED having at least one phosphor, an average particle size d 50 of the phosphor 0.1~1.5μm Characterized by being within the range of [Selection diagram] Fig. 1 |