What are the methods of implementing white light in LED packaging process?
Ultraviolet LED chips excite phosphors to emit three primary colors and synthesize white light.Advantages: good color rendering and simple preparation.Disadvantages: at present, LED chips are inefficient and have UV light leakage problems, and the temperature stability of phosphor needs to be solved.
The LED three primary colors red green blue, multi chip group and the synthesis of white light emitting.Advantages: high efficiency, color temperature controllable, color rendering better.Disadvantages: three color light color temperature leads to different instability, complex control circuit and high cost.
The blue LED chip to stimulate the yellow phosphor, yellow green light blue and white light emitted by the synthesis of LED fluorescent powder, in order to improve the performance of color which can also add a small amount of red fluorescent powder or at the same time plus the amount of green and red fluorescent powder.
