Digital BW, The Print

There has just been a long discussion string on the colorsync listserver
about the best way to dim very bright LCDs. 

In a nutshell, the issue is whether the dimming is done in the monitor
itself or in the video card lookup table. Adjusting brightness using the
controls on the monitor maintains all the available brightness resolution of
the video card. If however dimming is done "in software" in the video card,
you simply dim the monitor by not putting out any value higher the maximum
desired brightness. This throws away a lot of possible levels and may cause
banding. To further complicate things, for monitors that support DDC
(Display Data Channel) it may be possible to control the monitor brightness
via DDC.

Consult colorsync-users@list.apple.com for the gory details.

Steve Bye

-----Original Message-----
From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of Ken
Carney
Sent: Sunday, August 07, 2005 4:35 PM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: RE: [Digital BW] LCD calibration question

For some reason they don't want you to use PreCal with an LCD.  I know the
LCD doesn't have separate RGB guns like a CRT, but it seems the brightness
and contrast would still be useful.  I'll experiment - it doesn't cost
anything.  I've just noticed that with b&w or color prints, the soft
proofing adjustments with IP6 profiles to match the print seem pretty
extreme.  What caught my eye, so to speak, was downloading the Kodak
profiles for their "professional" RC paper to use with a Canon dye printer -
the prints came out way too dark.  (That's "RGB" b&w BTW, since it appears
the gray profiles in IP6 don't work with PS soft proofing.)

  --Ken 

> -----Original Message-----
> From: DigitalBlackandWhiteThePrint@yahoogroups.com 
> [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On 
> Behalf Of Paul D. DeRocco
> Sent: Saturday, August 06, 2005 8:51 PM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: RE: [Digital BW] LCD calibration question
> 
> > From: Ken Carney
> >
> > I thought someone on the list might know the answer to this 
> - I can't 
> > find it.  My monitor is the Samsung 213T and I'm using the Pantone 
> > Spyder and OptiCal Pro.  The only instructions for an LCD monitor 
> > relate to the Apple 21" Cinema display, and suggest setting 
> brightness 
> > to 50% and contrast to max before calibrating.  Is this the 
> case for 
> > LCD's in general, or more specifically mine? Thx for any help.
> 
> That's pretty common advice, although a lot of LCDs don't 
> have those settings, only backlight brightness. However, if 
> you have OptiCal, then you have PreCal (unless they've folded 
> that functionality into OptiCal recently), and that should 
> guide you as to how to set the controls.




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