Problems with identical monitors

Seagull

Would like to share some strange problems I've encountered recently,

I have two Benq BL2405 led tn monitors that I bought a year ago, I am able to use them ok so far though only with nvidia cards. I've recently gotten new some office space so I bought a third BL2405 monitor for use there. However this new monitor does cause me eyestrain/migraines - even when using it in the exact same set up as the other two.

As far as I can tell its an identical monitor, same model type, number, revision - just manufactured approx one year later than the two I have now.

Any thoughts on what's different? I suppose some kind of change in manufacturing might have occurred that didn't warrant a change in revision number printed on the backs of these panels.

Gurm

Have you considered that it's the office space, not the monitor?

My workspace at my employer is nearly unusable due to the overhead lighting being high-intensity "daylight" bulbs (which ironically make the entire place look darker to me). I brought in one of my home monitors which cause NO eyestrain, used the same laptop... and got eyestrain.

So it might not be the monitor.

Seagull

I had problems both using it in the office space, and in the same place/setup as the original monitors unfortunately.

Seagull

Might have found an explanation

http://www.lagom.nl/lcd-test/inversion.php#invpattern

The voltage to the pixels on LCD monitors oscillates between + and - (approx 30hz) to prevent damage to the lcd matrix, producing more or less flicker depending on calibration. My assumption is therefore that the monitor I tried recently had a poor calibration (slight more + than - for example) calibration affecting visual properties. Can't test it unfortunately as I've already returned the monitor,

528491

As previously referred, it may not be about the displays themselves.

I have terrible migraines at home when using my old LCD screen (which in paper should be the best solution) and I am in general somewhat okeyish at work using 2 (!!!) bigger displays. Why? Because my place is a lot darker and is worse illuminated than my workplace, making the light coming from the display at home stand out a lot more than it does at work. Most of the lighting at work (at least during the spring/summer/fall months) is natural light, while at home I tend to always exclusively depend on artificial lighting. Even artificial light at work is different that at home.. there we have those lights that will spread light to the walls and increase the overall brightness levels of the room, thus making the displays look darker in comparison.

degen

A dark work area will increase your pupil diameter massively and will expose you to much more of your problem light source.

For many who are only minimally affected by modern artificial light sources, optimizing their work environment may make the difference between having headaches/tired eyes and being symptom free.

To us, this is just an exacerbating factor.

Having said that, I could probably stare at a 100w incandescent light bulb indefinitely and never have a problem 😉