Phosphors can deposited onto an LED die surface (‘local phosphor’), or made into a free-standing structure – like a dome – and positioned over a blue LED (‘remote phosphor’). “Remote is our main ...

Figure 2b presents the spectra for two phosphor-based white LEDs and sunlight. Naturally there are pros and cons to each of the schemes. The advantage to using a blue LED and a yellow phosphor is ...

or use a blue LED and cover it with yellow phosphor that filters blue wavelengths and ultimately produces a bright white light. The thickness of that layer determines the warmth of the light ...