OT: white LEDs
mcguire at neurotica.com
Mon Feb 22 21:25:49 CST 2010
On Feb 22, 2010, at 10:20 PM, Randy Dawson wrote:
> If you look at one in the microscope, it looks like an LED with
> some sort of phosphor painted over the semiconductor. Is that how
> these things work, its really a high efficency IR LED, with a
> phosphor doubler to bring the wavelength into visible? Just
No, they're coated with a blend of phosphors designed to give
"sorta" white light. The native LED underneath the phosphor coating
is usually blue.
Remember, if you double the narrow-band output of some common IR
LED output, you'll get some narrow-band visible output...more or less
a single visible color.
Port Charlotte, FL
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