Re: LCD Monitors

["dickbo" <dickbo@btopenworld.com>]

Not LCD should have been  CRT.

----- Original Message -----
From: <CDTobie@aol.com>
To: <dickbo@btopenworld.com>; <epson-inkjet@leben.com>; <dd-b@dd-b.net>
Cc: <kpoth@bellsouth.net>
Sent: Thursday, June 13, 2002 1:44 PM
Subject: Re: LCD Monitors


>
> In a message dated 6/12/02 6:05:43 PM, dickbo@btopenworld.com writes:
>
> >Intresting you say all that because some weeks ago I decided to
ColorVision
> >
> >my monitor profile by using the display cards software controls, and the
> >
> >truth is I could not do it because although the card software allowed far
> >
> >more movement on white and black point settings they appeard to be beyond
> >
> >the spyders ability to read them. At the same time RGB adjustments could
> >not
> >
> >be done when using the colour visions software.
> >
> >
> >
> >Although the cards driver software appeared to have a much wider range
> >of
> >
> >screen visual change options you simply could not use them to calibrate
> >a
> >
> >monitor profile.
>
> There are some odd statements (or some odd wordings, its not always
possible
> to distinguish) in the above post. The most video card drivers can do for
an
> LCD is to set the black to allow no light through, and white to allow the
> RG&B to be fully exposed (or at least one set to full, and the other two
> damped down to provide the desired white balance), and to allow maximum
Red,
> Green and Blue individually as well (plus set a gamma and smoothing curve
for
> each channel, whichi is what the video card download from the profile
> utilizes). Anything less than this is a  reduced gamut or reduced range.
On
> the other hand, the  engineers responsible for the actual LCD monitor
> settings tend to determine effective settings quite well, so the default
> front panel settings often offer optimal range and color, or close to it.
The
> Spyder can read any brightness up to well beyond 200 candelas, and colors
as
> far out as LCDs can manage, and blacks down to, well... down to where no
> light emissions can be sensed. So how could messing with how your video
> driver defines 0 to 255 in the three channels somehow exceed the Spyders
> ability to read the screen? I don't doubt that messing with these controls
> could get you a lousy result; only that this lousy result is the fault of
the
> Spyder being unable to read what the video driver is sending, which is
simply
> numbers between 0 and 255 in three channels. Its the monitor settings that
> make those numbers into colors and range on the screen.
>
> C. David Tobie
> Design Cooperative
> CDTobie@designcoop.com
>


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