Topic awaiting preservation: A question on laptops power consumption (Page 1 of 1)

i pretty much thought that setting your overall screen tones (i.e. your color scheme) to a dark neutral color would be the thing to go if you wanted to save some battery power.
now i read that you should change your desktop color to white. that a white pixel spends 50% the energy of a black one.
And consequently the advice was to change the entire color scheme to pale light colors.
This strikes me as odd. Anyone care to share some of their knowlege here?

Uhmmm, it may seem odd but it may also have a reason. Notebooks use LCD and LCD has always a light inside turned on: when you want it all black, what happens is that all the pixels have to shut down the passage of this light and so, when you want it all white, the pixels should let the light go, so, maybe avoiding the light to get out is more energy consuming than letting it go. It may make sense, yes. I think that a better way to save power is to lower to the minimum the brigthness of the LCD, because this way you are lowering the internal light consumption. just guesses though.

The poster has demanded we remove all his contributions, less he takes legal action.
We have done so.
Now Tyberius Prime expects him to start complaining that we removed his 'free speech' since this message will replace all of his posts, past and future.
Don't follow his example - seek real life help first.

The display gets darker because the brightness is set to low, not because the colors are made darker, and brightness low means that the internal lamp, the one that is always on (as long as the display is on), had the power lowered.

It's two different things: one, the lamp inside the LCD, two, the barrier that each pixel imposes to the light generated by this lamp. The color, in a LCD, as far as I know, is controlled by the pixels, not by the lamp. But of course that if the lamp is set to a lower power, the colors will be affected, they will look more dull (duller?).

But I repeat, I am guessing, based on my lack of real knowledge about LCDs.

what viol says is basically correct, but now you must consider
that the crystals in the pixels have basically two (oversimplification!) states
-their natural state - 0 degrees
-rotated - 90 degrees - consuming power.

now, the natural state might be either 'transparent, light may pass', or 'blocking light'. That depends on just the exact crystals used, and there have been lcd displays with either of them. So yeah, one setting will use slightly less power - but I doubt you're going to notice the couple of minutes it might buy out of your hours long run time - and of course you'd have to find out what kind of display you have.

so long,

->Tyberius Prime

^^^thats true. but also what i have heard, you dont take notice of it, because its not even 5 minutes