Quote:
Originally Posted by max99
I'd be very surprised if changing the colour of an LED would require any re-engineering of the screen layers but I'd be happy to be proved wrong in the interests of engineering.
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I'm reasonably sure it does. AIUI, the light guide is an intricate piece of etching which uses diffraction to spread the light out -- and, as such, it depends on the frequency of the light it's guiding.
I'm fairly amazed they managed to come up with a light guide design that works *at all* when the colour changes, let alone working as well as it does. (Perhaps the frequency-dependence isn't as delicate as I thought it was.)