LCD's and Room Illumination
LCD's and Room Illumination
- Subject: LCD's and Room Illumination
- From: email@hidden
- Date: Mon, 12 Nov 2007 09:57:03 +1100
First off, that's a real old spec. 2nd, doesn't mean lower isn't useful or
ideal (they DID have to come up with some settings to recommend, I've been
told at one point, 18 was ideal but higher was selected to keep the level
from being too low as a recommendation). When you have any ambient light
hitting the display, this affects the dynamic range based on the effect of
black. So depending on the light levels, you may need to adjust the contrast
ratio based on this light, lower affects this less of course.
Andrew Rodney
Andrew,
While I recognise your knowledge and experience in this field it is your common sense in the
application that is probably your most valaubale trait. Having dispensed with the flattery I would
like to say that I am perplexed by the necessity to have such low ambient lighting conditons. As
Tom Lianza pointed out on another topic in this forum (instrument consistency) the perception of
light and colour is a combination of factors which should NOT (cannot?) be isolated. That is, our
perception of an object's tone and colour attributes are always influenced by its iherent colour
qualities IN COMBINATION with those of its environment.
Having said that why do we view images under ambient lighting conditions that do not reflect the
end user experience. The luminace and colour of the image will always be affected by ambient
light whether it is on a display, transparency, photographic paper or printed reproduction. I would
have thought the aim was to ensure that what we see replicates as close as possible the way
these images will be untimately viewed. Lowering ambient light level might reduce the incidence
of extraneous factors affecting colour but it will also have the effect of increasing the perceived
contrast. Images will appear brighter. Yes/No? Isn't that why we like to view our televison and
cinema in a darkened room? I have noticed recent promotions in the advertising of LCDs Vs
Plasmas for the home user focussing on such relative factors in the home contrasting these 'rival'
technologies and recommending one over the other where approriate. Horses for courses as they
say.
On a related point I would have thought the most important apsect is the white point or, more
correctly, the neutrality of the surrounding environemnt. As long as the ambient light is neutral
and controlled we should be on safe territory although I do recognise the need for a standard.
However, I would have thought that having 'lighter' but neutral ambient viewing conditions would
more readily match most end-user requirements. With respect to the ISO standards what
perplexes me is why 3664 adopts D65 and 12646 adopts D50.
Regards,
Mark Stegman
Graphic Prepress
Sydney Institute
TAFE NSW
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden