Re: NTLK White Backlight Kit

From: Marco Mailand (Marco.Mailand@psi.ch)
Date: Tue Apr 11 2000 - 03:42:54 EDT


Robert Benschop wrote:
> David, I don't think that you answered these questions of Marco and I was
> wondering if you would, ...
May be I've asked to much, but I'm intrigued how the LED can couple in
the light sufficiently to be distributed equally all over the whole
display. And then the LED power supply should provide about 20mA to
guarantee enough "pumping" UV light to the UV-to-visible light converter
inside the LED. But these current of 20mA can be chopped by e.g. a duty
cycle of 5% (1:20), resulting in only 1mA average current consumption.
Then could we have the backlight always on, if the MP is on.

May be Apple didn't do that because white LED's where not available at
that time.

-- 

Regards / Viele Gruesse

Marco Mailand

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