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Thread Tools | Display Modes |
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LCD displays in laptops
Hi all, firstly am not sure if this is the right newsgroup, if not -
please point to the one that is... I would like to establish the exact way most laptop LCD displays work in (if any specific info re. iBook is present - it will be most welcome). I am aware of the general theory of LCD functionality (e.g. use of polarised filters and applying voltage to crystal molecules to untwist them)... but... there are essentially two mode for LCD displays to work in (http://www.altadox.com/lcd/knowledge...play_modes.htm): positive mode - this is where BLACK is achieved by fully turning the pixels ON (i.e. applying the voltage to them) which is kind of opposite to the way CRT monitors work negative mode - the opposite of positive (i.e. WHITE is the result of fully tuning the pixel ON in terms of applying a voltage to it)... i would like to know which mode is used by most laptops (esp macs). This is important for a number of reasons, one of which is the default "blackness" in some of the screensavers and autopower display managers. Whilst displaying full black on CRT monitors actually provides power saving and "time off" for relevant pixels, in some LCD displays this may be actually driving corresponding pixels (i.e. the ones that display black) fully. Kind regards, Leon. |
#2
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i would like to know which mode is used by most laptops (esp macs).
This is important for a number of reasons, one of which is the default "blackness" in some of the screensavers and autopower display managers. I don't know the specifics of the LCD, but when my Powerbook is asleep and open, the screen is black and it is using virtually no power. I've left it on and unplugged and come home from work to find the battery 95% full. Screensavers however are another story. Take the default Mac "flurry". Most of the screen is dark, but it takes a lot of CPU power to create the image. So for a portable it's best to use a low-power alternative or just have the screen turn completely off. If it's any consolation, my system goes from fully asleep to awake in about 2 seconds. If just the screen is asleep, it's about 1 second. If you put it to sleep by closing the lid, it's awake by the time you get the lid fully open. |
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