[Tig] what are we going to do (monitors)

[Bob Friesenhahn]

On Sat, 29 Mar 2008, Bob Kertesz wrote:

> And certainly, in a strictly empirical sense, what he said was happening was
> what I (and everyone else in the room) was seeing.

So phosphors reflect some light.  This is not surprising since CRT 
screens do not look pitch black when illuminated with a light.

> I suppose that's possible. But even if that were the case, the incident still
> speaks to how we normally set up and view monitors. And since no one I know
> does critical viewing or grading with no ambient light at all, the BVM Sony
> LCD appeared to have deeper blacks than the BVM CRT under identical ("normal")
> viewing conditions.

In order to fully evaluate the Kertesz effect, you could sit in a 
dimly lit room, and look through a hole into a different room which is 
left fully dark.  This dark room would have the LCD and CRT for 
evaluation purposes.

The real problem with LCDs is not if they are capable of becoming 
fully black.  The real problem is how the LCD behaves when stepping 
from fully black to the next several steps in brightness.  There may 
be a large step from fully off to somewhat on and the steps may be 
non-linear.  CRTs are inherently analog devices while LCDs are 
typically digitally-strobed devices.  It is possible to make a linear 
LCD but it would be extremely expensive since each RGB pixel site 
would need three analog drivers.

Bob
======================================
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/