AVS › AVS Forum › Display Devices › Display Calibration › Gamma issue (or not)
New Posts  All Forums:Forum Nav:

Gamma issue (or not)

post #1 of 6
Thread Starter 
Hello!

Finally I got a new computer at work with nice and wide Dell P2411h screen. At first I was excited but after some while I started to feel that there's something wrong with colors. It wasn't the first time and I started to change BRIGHTNESS/CONTRAST controls built in screen. Usually it helps but not in this time. After some while I found out that I'm able to change color temperature as well. I chose WARM preset. A bit better but my eyes still feel tired.
That is a weird feeling. Even with very low brightness there is feeling that white color is somehow too intense. I found out ATI Catalyst control center (ATI FirePro graphic card) and it has got GAMMA setting. I tried to change it. When its value is below default value then picture looks nice but my eyes can't stand it for a long time. Seems like higher gamma is better for eyes but then my picture gets too pale - there is too much white.
I tried to used Windows 7 built in Screen calibration tool to change gamma. It says that by default my screen has too low gamma and I should rise it. As I said before, the feeling is better but my picture seems not OK at all.

Any ideas?

There is enough lighting in the room, my eyes are ~50-60 cm far from that screen. My vision is OK, at least eye doctor said that smile.gif
post #2 of 6
Thread Starter 
Still no replies?
I simply wanted to know what affect GAMMA does have on eyes...
post #3 of 6
Quote:
Originally Posted by acer666 View Post

Still no replies?
I simply wanted to know what affect GAMMA does have on eyes...

I'm afraid I'm not very techy so stand to be corrected, but this should help with the theory:

http://www.spectracal.com/downloads/files/Website/12%20Gamma%20estimation.pdf

As I understand it, it is how fast the 0 to 100 IRE divisions of grayscale (black to maximum light) go up that scale,so presumably it has greatest visible effect closer to black.

The effect on the eyes would be to make a gamma value of 2.4 look darker than a gamma of 2.2 so would be more suited to a darker ambient light ie night mode.
post #4 of 6
If you're getting eye strain, then the likely setting that should be reduced is the contrast setting. It affects peak white where the brightness setting affects black level.
post #5 of 6
Quote:
Originally Posted by JimP View Post

If you're getting eye strain, then the likely setting that should be reduced is the contrast setting. It affects peak white where the brightness setting affects black level.

for a LCD display, backlight is the first control to lower (and then if needed contrast)
post #6 of 6
Thread Starter 
Thanks for all responses.

Some time ago I tried to change contrast settings but anyway everything was way too uncomfortable for me frown.gif
Quote:
Originally Posted by PlasmaPZ80U View Post

for a LCD display, backlight is the first control to lower (and then if needed contrast)

Any comments on this? How do I do that?
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Display Calibration
AVS › AVS Forum › Display Devices › Display Calibration › Gamma issue (or not)