What I need to know about PWM flicker?


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 🙂

Do my monitor flicker?

Most of the time yes. This depends on whether your monitor uses PWM or DC dimming.

What is PWM flicker?

Some manufacturers use pulse-width modulation to control the brightness of the monitor.

What is Pulse-width modulation?

Basically turning the LED on the backlight ON and OFF.

Why is this unhealthy?

Your eyes start to contract like this

And you get eye strain and eye pain.

How to fix this?

Set your monitor Hardware brightness to 100% using your monitor buttons.

Why set my monitor Hardware brightness to the MAX?

Most monitors don’t use PWM at maximum brightness.

What happens if my brightness is set to 80%?

Your monitor may use PWM

What happens if my brightness is set to 50%?

Your monitor may use PWM

What happens if my brightness is set to 100%?

Your monitor probably is not using PWM and you don’t get this ON and OFF thing and eye strain.

Isn’t 100% brightness unhealthy?

Yes if your room lighting is really low.

Why is this unhealthy?

Me taqomaki vinaka duadua ni mata ka na lailai sara na iwiliwili ni mata ni yalo kei na mosi ni mata, e dodonu me sega ni raica e dua na ivurevure ni rarama ena loma ni rumu na monita ni nomu.

E dodonu me veisotari kei na rarama ni loma ni rumu ka sega ni rai kina me vaka e dua na ivurevure ni rarama.

100% sa ca na ramase ena rumu butobuto?

Io.

Kei na 50% vakanuinui, E rawa ni 'u tale mada ga na mosi ni mata?

Io, Kevaka era vakayagataka na monita ni nomu na PWM.

Qai na veika me da cakava?

Rawa ni lewa na vakaveitalia na iserau ni monita ni na sega ni vakayagataka na PWM.

Au daramaka na ’ ka vinakata, na cava tale?

Waqaca na cina ena loma ni rumu na gauna kece ka vakayagataka na monita ni nomu ena vakanuinui levu taucoko.

I like a dark room, na cava tale?

You can buy some new monitor which is flicker-free or use Iris.

So I should use Iris at maximum brightness?

Sega, 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.

So I will not get eye pain if Iris is set to 50% vakanuinui?

Io.

Will I get eye pain if Iris is set to 40% vakanuinui?

Sega.

Will I get eye pain if Iris is set to low brightness?

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.

If brightness is set to 150% from Iris will I get less flicker?

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.

When backlight Hz is lower there is more eye strain?

Io, you have bigger breaks between ON and OFF and your eye contracts more.

When backlight Hz is bigger you get less eye strain?

Io, you have really small breaks or there are just no breaks in the light and your eyes don’t contract.

What is our goal for Eye health?

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.

Is no flicker 0 Hz frequency?

Sega, 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.

I’m confused, what to do?

Set your monitor hardware brightness to the MAX from the monitor buttons and use Iris to control the brightness.

Should I quit monitors altogether?

Well, this is the best solution but it is really hard in our world of technology and electronic devices altogether.

Are flicker and EMF connected?

Well, ruarua mai na electrically ni dua na iyaya ni veivakavulici ia e sega ni dua na isema levu.

Cakava na kecega ni monita ni vakayagataki PWM?

Sega, ia e levu vei ira, na tale eso na sikirini e vakayagataka e dua na ka vakatokai na VV dimming.

Na cava na VV dimming?

Ka sega ni vakayagataka na vakacagicagi lekaleka me lewa na rarama vakaoqo

O ni na veisautaka na VV vaka oqo

Kei na doesn oqo ’ cava e vakavuna na flicker.

Vakakina na VV dimming doesn ’ flicker ni kua?

Well, e tiko e flicker ni subpixel kei na veimataqali vakasaqari tale eso ia sa doesn ’ ka vakayagataka na PWM me lewa na rarama.

VV dimming e vinaka cake mai na PWM.

Do Iris does the same as DC dimming?

Io, but Iris changes the contrast a bit so DC dimming is better.

Ia, if you don’t want to spend a lot of money for a new monitor and want automation Iris is better.

Anything else?

Try Vakaveitalia 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.

Daniel Georgiev
Vakailesilesi LIU ni tekinolaji ni Iris

Tikinisiga ni Tabaivola: 15.05.2018

Tabaki ena Yavu, PWM

Ni valenivolavola ni veika vakaitaukei

Gadrevi vakavinaka sara

Kuki e yaga me baleta na vanua me ra veiqaravi vakavinaka.

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Functionality

Oqo na veivuke keda saumi iko vata kei na kena e galala na vakayagataki ni ivola kerekere ka me solia vei iko e dua na kena isau kevaka e dua sa sureti iko ki na mataveilawa ni vakaveitalia.

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