"William Sommerwerck" wrote in message
...
Who says fluorescent is inefficient? LED could be better if you could
turn off those in the dark parts of the picture -- but no claims for
that.

Quite the contrary. Many LED sets use local dimming to improve image
contrast.


Other problem with LEDs is producing a continuous spectrum smooth
white light -- needed to give all the colours from LCD.

The last thing you want is a continuous spectrum.




Local is a relative term and the effectiveness of these systems varies
considerably with real video. On/off contrast ratios can be impressive, but
the real test is how it performs with live video.

As for "continuous" spectra, again, it depends. Ideally, for a standard
video matrix decoding typical video, you would want spectra for R, G, & B
that match the CIE standard observer functions. These are what cameras are
designed to output, and what CRTs were more likely to approximate. You have
to account for narrow spectrum in the outputs of displays in the matrix for
the color decoder. Some sets have done a better job of this than others.

Like most technologies, there are caveats and implementation variance that
make some work very well and others less so. The best sets from Samsung and
the Sony look great, but still not as good in terms of blacks on real video
as the best PDPs. The color on the Sony seems more natural than that of the
Samsung to me, but neither are up to the best CRTs nor PDPs, yet. Darned
close, and better than many of the lesser from either technology. Any of
them properly calibrated will likely outperform any of the others out of the
box.

Leonard