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

[Bob Friesenhahn]

On Sat, 29 Mar 2008, Bob Kertesz wrote:
> If the room was made COMPLETELY dark, the CRT clearly had deeper blacks than
> the LCD.
>
> But if a SINGLE light was turned on anywhere in the room (it was a largish
> conference room with room for about 100 people), and the light was just bright
> enough so you could recognize people's faces, the glass front of the CRT
> picked it up and raised the CRT blacks, and then the LCD had (significantly)
> deeper blacks than the CRT. This was the case even if the light was behind the
> monitors - the glass CRT gathered the light from the room and up went the
> blacks.

Are you sure that the glass CRT "gathered the light from the room" or 
is that just what Sony told you?  If the light was behind the CRT, how 
did the CRT manage to gather the light?

> It was kind of astonishing, to put it mildly. This is the first time I've
> posted anywhere about it, because I'm still digesting what I saw.

This is heretofore to be known as the Kertesz effect.

The human eye is "biased" by the ambient light level.  Our retinas 
close down when there is more light, causing our eyes to be less 
sensitive to it.  There are other adjustments as well.  Perhaps the 
Kertesz effect is best explained by the behavior of the human eye than 
the behavior of CRT phosphors when (quite) weakly excited by stray 
photos.

Bob

P.S.  I used Google's web page today to test my LCD display.  With the 
level of ambient light in my room, the page did look completely black.
======================================
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/