[Cialug] OT: LCD Pixel power?

[David Champion]

Not an EE, but I'd guess that the power inverter for the backlight is
one of the biggest power drains. There are now some LED backlight
displays coming out that have better power usage, and more even lighting.

I'd guess that the color filter matrix for LCD screens doesn't really
care which filter is on or off, but the frequency of how often they
change is more likely to use more or less power.

If you're doing something like rendering 3D, other parts of the system
(assuming you're talking about a laptop) are going to be draining a lot
of power. For instance, one of my laptops would last 2.5 to 3 hours
doing "normal" stuff. Playing a 3D game, the battery would last about 15
minutes.

-dc

Nathan C. Smith wrote:
> I have a question regarding LCD displays.  Does it take more power to show
> pixels of a particular color - are dark pixels harder on power than light
> ones?  Or does the nature of the LCD require even power through screen at
> once?  Is the backlight itself a bigger power hog than the screen?  (If it
> is bring on the LED backlights!)
> 
> The background of this question is if there is if there are any screen
> contents or color schemes that can reduce battery usage - I'm betting there
> aren't.
> 
> -Nate
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