Blackle, such as Pinkle and Greenle, is a personalized version of the well-known Google. The principle behind Blackle is based on the fact that some may think the display of different colors consumes different amounts of energy on computer monitors(which is being confirmed as false by recent studies). The creators of Blackle cite the US Department of Energy’s Energy Star information page which states that a monitor displaying white uses 74 watts, while a monitor displaying black uses 59 watts. They also cite a 2002 study from Roberson, who tested a variety of CRT and LCD monitors and found that an all black screen consumed less energy than an all white screen on all of them
One critic, a technology journalist who reviews computer hardware, tested 4 cathode ray tube (CRT) monitors and 23 liquid crystal display (LCD) monitors, and found that power was saved by the CRT monitors, but was less than that claimed by the blog post that inspired Blackle. The LCD monitors tested showed increased power use in the majority of cases, although most of the larger (24 inch) monitors did use less power displaying a black screen.
The truth about using a black background
- Useless : it may be using MORE energy than a white background. Up to 3 times more.
Source : Businessgreen.com
- Unreadable : 'Black (background) is harder to read, takes longer to read,
can cause tension and muscle strain and eye problems.
Source : datalink.com
When a voltage is applied across the electrodes, a torque acts to align the liquid crystal molecules parallel to the electric field, distorting the helical structure (this is resisted by elastic forces since the molecules are constrained at the surfaces). This reduces the rotation of the polarization of the incident light, and the device appears gray. If the applied voltage is large enough, the liquid crystal molecules in the center of the layer are almost completely untwisted and the polarization of the incident light is not rotated as it passes through the liquid crystal layer. This light will then be mainly polarized perpendicular to the second filter, and thus be blocked and the pixel will appear black. By controlling the voltage applied across the liquid crystal layer in each pixel, light can be allowed to pass through in varying amounts thus constituting different levels of gray.
The principle behind Blackle is based on the fact that some may think the display of different colors consumes different amounts of energy on computer monitors(which is being confirmed as false by recent studies).
*estrngd wrote: δηλαδή, πώς να τα πατήσεις;
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