On Mon, 24 Nov 1997 17:10:54 +0800, you wrote:

>I noticed a comment in another thread about so-called 'white' LEDS, and
>would like to contribute / ask for comments on experiences with these
>beasts.
>
>Experience.  (Kingbright RGB LED - 5mm clear and milky versions tested)
>
>As these are made from three separate LED die in a single epoxy 'LED'
>casing, there are some side effects that are not exactly desirable....  The
>most obvious is that the LEDs are only white when you are on a specific
>vector near-axis.  Moving away from this point the colour shifts towards
>the three primary colours and their combinations.  The actual usable white
>cone off the observed axis is VERY small.
I beleive there is a single-chip LED technology, using a phosphor type
arrangement. I don't know if any currently available devices use it,
But I've certainly seen some bright white LEDS that don't change
colour as you change viewing angle.
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