"Roland Perry" wrote in message
...
In message , at 19:34:17 on Sun, 8 Mar
2015, john james remarked:

The backlight is probably the biggest power consumption factor in a TV.

I don't buy that.

There's some numbers here :

http://www.tomshardware.com/reviews/...ht,2930-5.html

Executive summary:

For LED the delta for 25% *brightness setting* change is 3W,

Which is bugger all in the total power consumption.

so at zero brightness

That is never seen with a TV when watching TV.

the total (ie the consumption of the non-backlight components alone) would
be ~16W, while at 100% brightness the backlight is consuming 29-16 = 13
watts. I doubt there's any one non-backlight component taking 13 watts (of
the 16 watts) on its own.

Meanwhile, the delta between black and white visible *content* is smaller,
at about 1W, which is the fluctuation we'd need to be looking for.

Which is again bugger all in the total consumption.

And plenty of places won't have just one TV being watched too.

CCFL similarly.

I've got a large non-LED TV as a computer monitor and I can feel the
heat coming off the screen from six inches away.

Yes, but that isn't the backlight.

What is it then (it goes away when I put the screen into standby).

The rest that isn't the backlight.

And I don't get anything like that with a LED TV.