White LED is done by those methods?

At present, the realizing methods of the white light LED mainly has three kinds: 1, through the LED red, green, blue three primary colors more chipset and glowing synthesis of white light. Advantages: high efficiency, color temperature controllable, good color rendering. Disadvantages: sanki different colored light failure leads to color temperature is not stable, control circuits are complex and high cost. 2, blue LED chip stimulates the yellow phosphor powder, made by leds blu-ray and phosphor powder of yellow green synthesis of white light, in order to improve the color in which you can also add a small amount of red phosphors or performance at the same time, add a little green, red phosphors. Advantages: high efficiency, simple preparation, good temperature stability, good color rendering. Cons: poor consistency, color temperature changing with Angle. 3, uv LED chip to inspire a tricolor phosphor synthesis of white light. Advantages: good color rendering, simple preparation. Disadvantages: at present, the low efficiency of LED chips, have uv light leakage problem, phosphor temperature stability problem to be solved.

editor: China lighting network/leaves