Re: Ultra-cheap LCD Delivers Fair Performance for Fair Price

In article <3a3677b4-0d57-43c1-b640-cb02712bff79@xxxxxxxxxxxxxxxxxxxxxxxxxxx> Frank Provasek <frank@xxxxxxxxxxxxxx> writes:
I saw this set (TX-42F450S) in person at Costco. Picture quality is
good, but the 1000:1 contrast ratio indicates that it does not have
a dynamic backlight. Some of the new Samsung models have 1,000,000:1
contrast by using LED backlights.

The dynamic contrast is a bogus number, because if you really care about
contrast, you will want it to apply between any pair of pixels. If they are
lit by the same backlight, and the backlight is varying its brightness to
enhance the contrast range, then the dark pixel will have varying amount of
leakage when the backlight turns up to brighten up the bright spot (or the
bright area will be pulled down when the backlight dims for dark pixels).

Either way, you lose. Visually, it can be very annoying, and once you
notice it, you will be looking for a way to turn it off.

The human visual system reportedly has a contrast range of about 250:1,
so the 1000:1 is more than enough.

Alan
.

Relevant Pages

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