Comments on: Forget the Cheerleader; Save Black Google, Save the World http://svenontech.com/2007/05/16/forget-the-cheerleader-save-black-google-save-the-world/ The technology resource you can't resist! Tue, 02 Dec 2008 20:43:43 +0000 http://wordpress.org/?v=2.5 By: John Winstanley http://svenontech.com/2007/05/16/forget-the-cheerleader-save-black-google-save-the-world/#comment-101697 John Winstanley Thu, 17 May 2007 13:48:35 +0000 http://svenontech.com/2007/05/16/forget-the-cheerleader-save-black-google-save-the-world/#comment-101697 Hi Sven – version of this story have been circulating of late and I need to add my $0.02 if I may. The maths might be right for computers using tube technology but not so for (the majority?) of computers which are using LCD screens. The reason? A tube monitor has to fire more electrons at the screen to illuminate the white areas, thus using more energy per cycle. Tubes use light generation to form white areas on screen. LCD is the exact opposite. The whole screen is illuminated by fluorescent or LED light. For white areas the light is allowed to escape from the screen unfettered. For black areas the light is blocked by polarising the light passing through the LCD layer. The conclusion? For LCD screens there is no energy saving in displaying black as opposed to white. In fact the opposite is true as LCD screens have to use more energy to block the white light. With the increasing market share that LCD screens are gaining (laptops and desktops) the maths becomes less and less compelling. What do you think? Am I right? Hi Sven – version of this story have been circulating of late and I need to add my $0.02 if I may.

The maths might be right for computers using tube technology but not so for (the majority?) of computers which are using LCD screens.

The reason?

A tube monitor has to fire more electrons at the screen to illuminate the white areas, thus using more energy per cycle. Tubes use light generation to form white areas on screen.

LCD is the exact opposite. The whole screen is illuminated by fluorescent or LED light. For white areas the light is allowed to escape from the screen unfettered. For black areas the light is blocked by polarising the light passing through the LCD layer.

The conclusion?

For LCD screens there is no energy saving in displaying black as opposed to white. In fact the opposite is true as LCD screens have to use more energy to block the white light. With the increasing market share that LCD screens are gaining (laptops and desktops) the maths becomes less and less compelling.

What do you think? Am I right?

]]> By: Fletch http://svenontech.com/2007/05/16/forget-the-cheerleader-save-black-google-save-the-world/#comment-101674 Fletch Thu, 17 May 2007 07:10:03 +0000 http://svenontech.com/2007/05/16/forget-the-cheerleader-save-black-google-save-the-world/#comment-101674 are you just trying to bait me here? maybe it's from my rebellious days of poetry and short stories, but black is very cool...some of my best websites are all black! are you just trying to bait me here? maybe it’s from my rebellious days of poetry and short stories, but black is very cool…some of my best websites are all black!

]]>