> It would kill the backlight of the LCD.  Read the specs on max
> ripple for the supply and you will see that they have a very low
> tolerance.
>
> I did this once, (by mistake? / ignorance) and the backlight gave up
> after a month!
>
>
>     Kyrre

That doesn't sound right, something else must have been going on.
LED backlighting is simply that - LEDs, and they should be able to
take all the punishment we dish out to normal LEDs from DC to MHz
PWM. It is very important to have a current limiting resistor though
because the LEDs aren't designed to run off 5V directly

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