Does a pixel change luminance by simply increasing and decreasing value, or does it have to flush before changing?

[xMax]

its a very simple question. assuming all conventional LCDs recieving digital signals from a DVI graphics card function in the same manner.

so if i picked a green subpixel anywhere in the frame, and this pixel had a luminance value of 64, and if it had to change to a value of 192 in the proceeding frame, then does it simply increase to 192 or does it have to flush to an off state before increasing?

and what about infinite sustained persistence: if i had the entire display set to a background color whose value was Red=127 Green=127 Blue=127, and the image was to remain unchanged for a whole year, then would the screen have to be refreshed at some point in time, or can it remain completely idle, as if to say the graphics card wouldn't even need to send signals to the display. and if it had to be refreshed, then how would that work.

 

[xtknight]

I'm not 100% sure about any of this...but these are my educated guesses.

The pixel will simply increase to 192, which explains why some motion blur isn't as bad as others. Crystals don't refresh, they stay in their state for a long time, which is why you don't see any flicker. How long? I don't know. The video card will keep sending signals to a LCD just like it did a CRT, for the legacy support. The LCD will detect that there's no change in the pixel so it will leave the crystal as so. However I'm also not sure if the DVI specification changes that or not. It's very possible since I've never seen any DVI CRTs.

 

[DRavisher]

I'm pretty sure that it will go directly to 192. As xtknight said.

 

[jr9k]

A common monitor will go directly to 192, an overdrive monitor will go up to 255 and then fall to 192. Take a look at this page.