eye burn in lcds

D

dopple

Gawd
Joined
Oct 5, 2011
Messages
685
im using a matte finish 22 inch tn panel. at a 40 inch distance at really low brightness settings but when i read text it kinda leaves a burnt mark/image retention in the eye for a while especially when using it at night in low room light.

whats the solution to this? i dont have this issue with the CRT i have.

are my eyes too sensitive?
 
This sounds similar to what happens when I see a bright light or stare at a pattern for too long. I too get image retention in my eyes. But it usually goes away wifhin a few seconds to a minute. I think crts may not have that effect because it doesn't use sample-and-hold like LCDs do. CRTs are constantly refreshing and their phosphers usually are only on for around 1ms. You may be forgetting to blink. Thus staring too long at an image.
 
If you are not exposed to light at your Job it could be your Job that you used to pay for the thing. I work in Retail and I get pretty bad side effect If I use my gaming rig which has led lcd asus monitor for more then two days in a row.

Not all monitors are of the same quality big monitors might be worse then smaller ones. Hardware can make the difference too. I had a cheap card that was much worse then amy 660 gtx drivers can make a difference too.

lcd is just junk technology forced on the masses. Have a nice day
 
suiken_2mieu said:
This sounds similar to what happens when I see a bright light or stare at a pattern for too long. I too get image retention in my eyes. But it usually goes away wifhin a few seconds to a minute. I think crts may not have that effect because it doesn't use sample-and-hold like LCDs do. CRTs are constantly refreshing and their phosphers usually are only on for around 1ms. You may be forgetting to blink. Thus staring too long at an image.
Click to expand...

blinking tends to break my concentration but when i do blink i see the image retention for a couple of seconds. doesnt happen in crts unless the brightness is too high...

maybe the ccfl frequency of light is the problem..
 
Comixbooks said:
If you are not exposed to light at your Job it could be your Job that you used to pay for the thing. I work in Retail and I get pretty bad side effect If I use my gaming rig which has led lcd asus monitor for more then two days in a row.

Not all monitors are of the same quality big monitors might be worse then smaller ones. Hardware can make the difference too. I had a cheap card that was much worse then amy 660 gtx drivers can make a difference too.

lcd is just junk technology forced on the masses. Have a nice day
Click to expand...

that sucks.. yeah im indoors but exposed to light from open windows through the day... so what monitor are you using now?
 
PWM problem, sounds like. You cant see it but it still affects your vision system. Lowering brightness on most monitors turns on and off backlight quickly so the retina is still exposed to maximum brightness for short timespans.

You should try LED monitors without PWM (U2713HM or ZR2740W, for example), lower brightness to comfortable levels and see if that helps.

CCFL is a bastard in disguise. While the PWM control is smoother, CCFL light have extremly high peaks at some frequencies, making the light seem less bright. Again that 'should not' affect vision system. But it does and some people are more sensitive to it than others. Some CCFL types are better than others, though.
 
You might also try bias lighting. I.e. placing a light that does not cause you problems behind the monitor so that your eyes do not become as dark-adapted.

You can test if the PWM CrabJuice mentioned is a problem by turning the display brightness to maximum, then lowering the white point using your video card drivers. This will decrease the contrast, but should give you an idea if PWM is affecting you.
 
Mr.Pixel said:
You might also try bias lighting. I.e. placing a light that does not cause you problems behind the monitor so that your eyes do not become as dark-adapted.

You can test if the PWM CrabJuice mentioned is a problem by turning the display brightness to maximum, then lowering the white point using your video card drivers. This will decrease the contrast, but should give you an idea if PWM is affecting you.
Click to expand...

Best done with a hardware calibrator if you can find one.(buy or borrow).
This is what I did on my old S24A350H which had pretty much no flicker at 100% brightness but horrible at 75% or lower. So my way to deal with it was this:
1. Brightness at 100%
2. Lowered the Contrast to 42 (yes, 42 cause only with 42 I was able to get an artifact free image - yes, I took pictures with my camera for this)
3. I used the hardware calibrator with this conditions, and the results were much better then the other way. Oh, trying to calibrate your screen for example for 8000-8500k with 2.4 gamma, also helped me alot. Still, the crap contrast of a TN panel doesn't help either.
 
great monitor suggestions and great brightness setting suggestions guys.

ill try the pulsating fix with 100% brightness and lowered contrast next weekend, right now im getting by with the Sony CRT.

ill also have a look at these non pwm monitors at the store tomorrow. these monitors dont flicker at any brightness setting? how does that work?
 
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