Originally posted by: xtknight
Well, the bigger the LCD, the bigger the backlight needed to power it. But maybe with white LEDs they will be able to throw 100 nits all over across the screen rather than having a bright light scattered across the whole screen. Well, I think they do use like 6 CCFLs, if not more, but it's still bright. The higher brightness really doesn't increase the contrast at all because the crystals have a harder time coping with blocking the light, thus raising black level and making that extra brightness rather useless.
There is no need to increase light density with a bigger monitor. This is 500cd/sq m. It is a light over area measure. Which should essentially remain constant. You still want to adjust this thing down to about ~100 cd/sq m, when calibrating for image editing and not burning your eyes out. A big monitor needs more light sources to cover the bigger area, but there is no reason to crank up the light/area just because you have a bigger monitor. Note the bigger 32 Inch Dell is 100 cd less, at 400 cd/sq m. A lot of smaller monitor are moving up each release.
I could go on an on about the wierdness of this monitor. Another oddity that I noted. Pure black is like have a door shut, it is almost like a special state that blocks light very well. So (0,0,0) is very black and doesn't not suffer washout with viewing angles. Thus I think they can pump the (measured number for) contrast very well with the super backlight and the very black off state. But that is a measured number and not a reflection of ultimate performance. The problem is that 5% (25,25,25) tone can still be very dark, but is very suseptible to the backlight power and washing out at viewing angle. The 5% to 30% range is most susceptible to view angle shifts and strange shimmering borders etc. Ick.
I believe there are LCD's out there that I would like, but they are all IPS based and finding one that is inexpensive and not broken like these dells is just too much trouble.
JM: As far as adjustments. I tried everything. You have the backlight/brightness on the monitor. After that you can actually do a custom color profile on the R, G, B in the monitors color menu and pull them down, though on mine they were already pretty low (in 30s). Finally you can use you graphic card to adjust gamma/bright/contrast, but that like the in monitor control of RGB will simply put more or less permanent bias on the liquid crystal structure and doesn't look so hot. If you can't get dim enough with backlight control the other methods are going to produce negative results.
I should note that I had a version 2.0 2405 which according to the panel list had a panel change and appears to have the same type of panel in the first 2407's. So I would not expect any better performance from the 2407.