>Does the LCD need cooling in itself, or is it the heat of the lamp that
>causes the problems?  I don't get the part about the Infra Red filters
>at all.  No, wait :-)  Are you saying that you need to filter the IR
>from the lamp before it gets to the LCD?

Yes on all accounts. The LCD produces heat (the shift registers on it do),
the lamp produces heat, and the LCD contrast point is very sensitive to
heat, plus it is easily damaged by heat. So you need to aim at running the
LCD at constant (low) temperature. An IR filter on the lamp is mandatory,
better use a lamp with little IR emission (arc lamp).

Peter

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