How an LED emit white light?

There are two conventional methods of producing white light with LEDs. This provides underpinning information to understand how tuneable LED solutions are produced. read more

convert an LED’s monochromatic emissions into white light by employing phosphor to create a Stokes shift and alter the wavelength of the original emitted light to a spectrum of shorter wavelengths approximating white light. read more

Phosphor-converted white light: Another approach to generating white light is by use of phosphors together with a short-wavelength LED. For example, when one phosphor material used in LEDs is illuminated by blue light, it emits yellow light having a fairly broad spectral power distribution. read more

The Phosphor white method produces white light in a single LED by combining a short wavelength LED such as blue or UV, and a yellow phosphor coating. The blue or UV photons generated in the LED either travels through the phosphor layer without alteration, or they are converted into yellow photons in the phosphor layer. read more