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Ghaargh.... image retention

Posted: 22 Jun 2009, 06:59
by The_cranky_hermit
I don't see anything resembling "backlight control." I've got these controls:

Display:
Contains H. Position, V. Position, Pixel Clock, Phase. All are disabled because I use DVI.

Picture:
Contains brightness, contrast, sharpness, color.

Picture advanced:
Contains a "picture mode" option which I just leave at "standard." The screen looks awful when it's set to anything else (Photo, Movie, and Dynamics).

PIP:
I've never used this.

System:
This lets me change the input, adjust OSD settings, and look at display information.

If you find yourself constantly adjusting your brightness/contrast, that is a sign that your LCD is not calibrated properly.

I haven't adjusted the brightness/contrast in more than two years until the image retention incident. And now it's back the way it was before.

Ghaargh.... image retention

Posted: 22 Jun 2009, 14:51
by Paradigm Shifter
You should have a backlight control!

Please tell me what screens allow backlight control. Because aside from laptops, I've never seen a backlight control.

Ghaargh.... image retention

Posted: 22 Jun 2009, 18:32
by Ryom
All of them should. Many don't. I have the Westy LVM-37w3 HDTV as a monitor, so there is that.

You can use brightness to control luminance, but that kills the dynamic range of the panel, which is why a proper backlight control is so important. You adjust for the maximum dynamic range of the panel with brightness/contrast, then adjust the backlighting to suit your ambient light environment. That way you are just shifting where on the luminosity scale your dynamic range is, rather than just compressing the scale down.

Ghaargh.... image retention

Posted: 22 Jun 2009, 22:29
by Paradigm Shifter
Nope. My 2405's and 2005's don't allow control of backlight intensity... :(

Ghaargh.... image retention

Posted: 25 Jun 2009, 01:09
by infernus
The only LCDs I've seen that allow backlight control are on TVs. Everything cranky mentioned are probably the only things you'll ever see on the average LCD monitor (maybe some scaling options too).

Ghaargh.... image retention

Posted: 25 Jun 2009, 02:01
by The_cranky_hermit
I've got scaling options. They're under "system."

Ghaargh.... image retention

Posted: 25 Jun 2009, 04:42
by Ryom
The only LCDs I've seen that allow backlight control are on TVs. Everything cranky mentioned are probably the only things you'll ever see on the average LCD monitor (maybe some scaling options too).


It's a damn shame isn't it? Of course, most of that dynamic range is sticking WAY up into the bright portion of the scale, rather than the dark end. Backlight control allows you to move the scale down into the darker end, brightness just reduces the top end with the dark end unchanging.