In message , "Dave Plowman (News)"
writes
In article ,
Dave Platt wrote:
In article ,
Dave Plowman (News) wrote:

And the same will apply to LED backlights. It's a big con that LED are
more efficient - they only are where supplying narrow bandwidth light.
As soon as you try and make them produce continuous spectrum light - ie
white - the efficiency goes way down. Of course they may improve - but
then again so may fluorescent.

You're assuming that the designers use LEDs to create
continuous-spectrum light, and then pixel-filter this down to the R/G/B
pixels.

My understanding is that this is *not* what they're doing. Rather, I'm
told that they use a matrix of individual narrow-emission R/G/B LEDs,
which backlight the R/G/B-filtered LCD pixel "shutters".

If you use narrow emission LEDs, then all you'll get is those colours.

With proper selection of the R/G/B LED wavelengths (e.g. pick them with
peak output wavelengths close to the peak-optical-sensitivity
wavelengths of the photopigments in the human retina) you ought to be
able to get very good efficiency.

Sod the efficiency - I want decent flesh tones. ;-)


Pervert

--
geoff