Color of background affects battery life?

Ive always wondered if a white blackground will use more power than a full black one? Im not too familiar with how LED's light up, but would it make sense that one color would yield better bat life?

 

Haa, thats a very interesting question but I don't think the color affects the battery life coz a display is a display the one that effect it the most is the screen brightness

 

I thought of this sitting at work in front of a 20" lcd with a white background...i noticed in my webcam that my face was lit up from the background. So it naturally makes you think of a light bulb, the brighter it is, or the more it illuminates, the more power its sapping. Thats why I wanted to know about LCD immumination: does a gray color require a stepped down level of power from white? Are they surely arent on and off...anyone with some knowledge?

 

Well I have nothing to do this summer. I'll test it out lol. I'll report back with my findings!

 

In the case of an LCD screen, I would guess no. As previously stated, the brightness of the backlight would have more to do with the energy used by the LCD.

By it's nature, LCD acts as a set of shutters that block out light rather than increase light to produce brighter colors ect... Here is a link about LCD. Essentially the electrical current is needed for both dark and light screens.

Mike

 

no, it's the same. it takes the same amount of power to push any color, including black, white, grey, whatever

 

yes, the tests for this would be interesting. I have never heard of this being done. I would think that since black is considered "the abscence of light" that the LCD would be in an "off" state for a pixel displaying 100% black.

 

black is not 'off', black is black on a LCD

 

Use Notebook Hardware Control and watch how your battery draw doesn't change when you change background colors. Plus as drumfu said, an LCD is still on when black as much as any other color.