A quick FAQ about the common questions about PWM flicker, because sometimes it may be confusing with all the information out there.
Write me somewhere if your question is not answered and I will answer it and add the answer here 🙂
Most of the time yes. This depends on whether your monitor uses PWM or DC dimming.
Some manufacturers use pulse-width modulation to control the brightness of the monitor.
Basically turning the LED on the backlight ON and OFF.
Your eyes start to contract like this
And you get eye strain and eye pain.
Set your monitor Hardware brightness to 100% using your monitor buttons.
Most monitors don’t use PWM at maximum brightness.
Your monitor may use PWM
Your monitor may use PWM
Your monitor probably is not using PWM and you don’t get this ON and OFF thing and eye strain.
Yes if your room lighting is really low.
For best eye protection and least amount of eye strain and eye pain, your monitor should not look a light source in the room.
It should match the brightness of the room and not look like a light source.
Yes, if your monitor uses PWM.
Iris can control the brightness of the monitor without using PWM.
Turn ON the lights in the room all the time and use your monitor at maximum brightness.
You can buy some new monitor which is flicker-free or use Iris.
No, Iris brightness is healthy and doesn’t use PWM.
You can use whatever value you want with Iris, but your monitor hardware brightness from the buttons is good to be at 100%.
Ideally, match the brightness with Iris to your room lighting.
If your room is really bright and your monitor brightness is dark you may get eye pain.
Try to match the room lighting to the brightness of the screen.
It will be the same as any other value.
Iris can’t change the hardware but can remove the PWM flicker when controlling the brightness.
Yes, you have bigger breaks between ON and OFF and your eye contracts more.
Yes, you have really small breaks or there are just no breaks in the light and your eyes don’t contract.
Basically, our goal is to have a constant light level which is not possible with LED or the highest possible Hz rate with LED.
Lower Hz rate is like turning the lightbulb in the room ON and OFF all the time.
No, we call flicker this ON and OFF.
Basically, in monitors, you strive for the biggest possible Hz for lowest eye strain.
In E-ink, you have 0 Hz frequency but the technology is different.
0 Hz is no flicker but you can’t have this thing with any light source.
You can get 0 Hz from a book or some physical object like a rock.
Set your monitor hardware brightness to the MAX from the monitor buttons and use Iris to control the brightness.
Well, this is the best solution but it is really hard in our world of technology and electronic devices altogether.
Well, both came from electrically charged objects but there is no big connection.
No, but a lot of them, the other monitors use something called DC dimming.
Instead of using short breaks to control the brightness like this
And this doesn’t cause flicker.
Well, there is subpixel flicker and all kinds of other stuff but it doesn’t use PWM to control the brightness.
DC dimming is better than PWM.
Yes, but Iris changes the contrast a bit so DC dimming is better.
However, if you don’t want to spend a lot of money for a new monitor and want automation Iris is better.
Try Iris for a couple of days and see if it helps you with eye pain and sleep problems.
If it doesn’t you can always uninstall it with 2 clicks.
CEO Iris Technologies
Publishing date: 15.05.2018
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