[vicuzoho]

Awesome, man. Thanks!

Could you check if the screen’s backlight is PWM controlled or not (in other words: does it flicker)? You can do so by pointing a mobile phone’s camera at it and check for either vertical or horizontal lines. It’s only visible at low brightness, and at 100% it usually disappears. PWM is the cheapest backlight controlling circuit, so many manufacturers use it unfortunately. This topic came up a couple days ago with the Teclast X98 Plus: http://techtablets.com/forum/topic/screen-flickering/

I’ve been literally watching V919 Air reviews for hours now looking for signs of flicker. I’ve found none so far, so it looks promising. I think it’s a very important aspect, as it directly affects some people’s health.

[vicuzoho]

I’m very very sensitive to flickering lights, I can’t even stand most LED lightbulbs because even those use PWM (they’re fine in the bathroom or the toilet where I don’t spend a lot of time, but I can’t use them in the living room for instance).

Anyway, I’ve been looking for other tablets and it seems that actually the Teclast X98 Air has a decent non-PWM display! https://www.youtube.com/watch?v=Q3e_KTfbSK0

Only problem is, I can only order the Android only version (I can only buy stuff from gearbest or tinydeal that they have in their EU warehouse), but I figure I can somehow install Windows 10 on it, right? Dualboot would be best.

That model has an Atom Z3735F though, but I imagine it’s not much worse than the Z8300, or is it? I don’t plan on playing games on it anyway.

[vicuzoho]

Thank you very much for clarifying this issue. I knew this tablet for $200 sounded too good to be true. I guess I need to find another model, I just don’t know how many Chinese tablets use PWM. But if such a great tablet uses it, chances are the other manufacturers use it too.

Too bad, every spec of the tablet is very nice by the way.

Maybe I could use it with brightness set to max all the time, but reading in bed at such brightness might not be optimal on the long run…

[vicuzoho]

Hey Gal,

I specifically registered on this forum so I can post in your thread. This flickering is caused by the backlight managing circuit called PWM. There are several ways to control backlight, but PWM is the cheapest. If you set the brightness to 100% then it will disappear, but then again, reading a book at maximum brightness is not a pleasant experience. You can read about PWM and why it’s so bad here: http://www.flatpanelshd.com/focus.php?subaction=showfull&id=1362457985

And here’s a comparison of a flicker free, non-PWM and a PWM controlled display: https://www.youtube.com/watch?v=RlUHBQDlYgA

I’m guessing that until you install the Intel Display Driver, the brightness is set to 100% and as soon as you install it, the driver will decrease the display brightness according to the light sensor’s readings (a.k.a “auto brightness”).

And maybe on Android you didn’t use auto brightness and it was set to 100%.

Could you please verify for me that this is indeed the case by manually changing the brightness both on Windows and on Android and checking for flicker? I ask because I wanted to buy this tablet but I’ve seen in many YouTube videos that it flickers, and it’s a serious deal breaker for me, it causes eye strain for me and my eyes become all red and literally bloody.

Thanks in advance.

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