Flicker free laptops?

[Edmond]

Anyone, by any chance know any laptops that have a flicker free ips panel in them?

Trying to find me a laptop. And my only criteria is a screen that wont burn my eyes out. Meaning flicker free, ips and matte.

Tho rarely do stores list what type of display a laptop has, and havent seen any laptops with specs that said "flicker free screen" so far either. Already have an eye-burning piece of trash from years ago, not paying actual money to get the same again... wtf is wrong with this industry?

[Chief Blur Buster]

All Apple MacBooks are PWM-free (They do Windows better than a lot of Windows laptops, including games) as are more than half of recent laptops. Unfortunately, many do not mention it in the specs.

Go to a Best Buy and run www.testufo.com/blurtrail on each laptop, while the laptop screen is set low. If it is PWM, you will visually see an effect caused by PWM. Another page is http://www.tftcentral.co.uk/articles/pu ... lation.htm

[Ethefor]

All Apple MacBooks are PWM-free (They do Windows better than a lot of Windows laptops, including games) as are more than half of recent laptops. Unfortunately, many do not mention it in the specs.

How do you know that all Apple Macbooks are PWM-free? In my opinion they are PWM, but with high frequency enough to hard to see flickering, but they not as PWM free as for example BenQ Flicker_free monitors. Do you know if there exist laptop as PWM free as BenQ Flicker-Free monitors?

[flood]

well once the frequency is high enough i'm pretty sure there is absolutely no difference

[Ethefor]

Maybe you're right, but there is a question if MacBooks Air is worth to buy (I'm using Linux currently).

[blargg]

PWM is different than non-PWM, no matter what the frequency. So regardless of whether it makes a difference to a human, a laptop that flashes the backlight at some frequency whose duty varies based on brightness setting is PWM, and the question of whether a laptop uses PWM has an answer.

I'm not sure there is good evidence that PWM (at any frequency) has no effects on any individual on the planet, even if slight, as compared to non-PWM. Therefore, if non-PWM choices exist and are comparable, and one places a high priority on one's well-being, looking for non-PWM screens is a reasonable approach. I understood this to be the question. Perhaps it was actually, "Low-flicker-rate-free laptops>?", in which case the distinction between high-rate PWM and PWM-free is unimportant.

[Chief Blur Buster]

There are many people who get eyestrain, even from 432Hz or ~800Hz PWM. This is mainly due to the stroboscopic effect causing vision discomfort. I see the PWM motion artifacts even with 800Hz PWM, when dimming my brightness while viewing a synthetic motion test, see LCD Motion Artifacts 101. So these effects can be human-visible. In some motion tests, PWM dimming products motion artifacts more uncomfortable than DLP colorwheel artifacts to my eyes, but it doesn't give me headaches like it does to some people.

[blargg]

Indeed, on my first LED monitor I got recently, I was pleased that its PWM was about 1100Hz, as many I looked at years ago had terrible 100Hz PWM. But even with this 1000Hz PWM I regularly see an array of after-images in my peripheral vision when flicking my vision around it, even on normal program windows. By the spacing, I think it'd have to be at least 5000Hz, preferably 10,000 or 20,000 (the maximum the driver chip is rated for).

[Chief Blur Buster]

Indeed, on my first LED monitor I got recently, I was pleased that its PWM was about 1100Hz, as many I looked at years ago had terrible 100Hz PWM. But even with this 1000Hz PWM I regularly see an array of after-images in my peripheral vision when flicking my vision around it, even on normal program windows. By the spacing, I think it'd have to be at least 5000Hz, preferably 10,000 or 20,000 (the maximum the driver chip is rated for).

That's about right.



(from lighting industry paper, about page 6)
Not everyone is bothered by it, but the stroboscopic effect (ala wagonwheel effect / phantom array effect) triggers eyestrain/headaches in some humans. To some, it's just a visual artifact not easily noticed unless looking for it. To others, it's uncomfortable for long periods, even unconsciously without being aware of it.

[NCX]

I tested 6 Macbook Pro Retinas with the Test UFO PWM Test and was unable to detect PWM. Also tested the 4K Lenovo Yoga Pro 2, and it passed while 10+ other laptops I tested in Best Buy failed. More information about laptops and PWM:

http://www.retropcmania.com/2012/11/pul ... n-lcd.html

Super low PWM frequencies (<200hz) bother me (my eyes get tired and start to water), but my 13" Macbook Pro Retina does not.