Night light issue - intermittent contrast changes

belegdolbelegdol Level 1
edited September 2021 in ZenFone 8


my Zenfone 8 is exhibiting a strange issue with Night Light: whenever it is active, every now and again the display will go into a kind of ultra-low-contrast mode, with blacks getting grey and everything looking washed out in general. It happens in particular when watching youtube or browsing reddit. Is anybody else seeing this? Is this a software or rather a hardware issue?


  • @belegdol Does this happpen on all refresh rate settings? And only when night light is active?

    Do you have a secondary device that you can take pictures of your display with? Would go a long way to show us what's happening.

  • I am on dynamic refresh rate settings. It happens when night light and dark mode are active, i have both set to activate from sunset to sunrise. I have another device, I will see if I take some pictures tonight.

  • belegdolbelegdol Level 1
    edited August 2021

    It turns out I was quite wrong. Upon closer investigation I have realised that the issue has nothing to do with night light. It seems that dark mode gets very grey when the phone is set to 90 Hz and low brightness. The changes I was seeing were probably YouTube app switching back and forth between 60 and 90 Hz. Here is a video of it: (can't post links yet)

    The washed out colours are only present in 90 Hz mode, neither 60 or 120 Hz are affected.

    The reason I was suspecting night light was that the problem is only noticeable at lower brightness settings, which only gets used at night.

  • I have been having this issue too! And as a matter of fact, the Zenfone 6 ALSO has the same issue. I own both Zenfone 6 and 8 and the color/contrast flickering seems to be a problem on both mostly with YouTube, reddit and even chrome. It seems that certain thumbnails and pictures on 3rd party apps like YouTube and reddit trigger the color flicker/change. Idk why, but it is noticable and very annoying sometimes. I don't it has anything to do with refresh rates as both the Zenfone 6 and 8 have the same problem. And as we know, Zenfone 6 only has 60hz display. Please let me know if you guys can fix this.


  • @belegdol That YT link does not work for m. It says that the video is not available.

    Back to the topic at hand, OLED displays typically perform better at medium and high brightness levels. It's also normal to see some variations across different refresh rates. If you are particularly sensitive to this, please use 60 or 120 Hz for low brightness conditions.

    @off2fly115 Zenfone 6 uses an IPS LCD display, so it should not have the same characteristics. Can you post a video of this in the ZF6 forum section?

  • belegdolbelegdol Level 1
    edited August 2021

    Here is the link, looks like it is case sensitive:

    I hope you can see the black level change. Is this within acceptable difference between refresh rates?

  • @belegdol It's an OLED characteristic. As I said in my previous post, please use the 60 or 120 Hz mode if you find 90 Hz not to your liking at low brightness.

  • Thanks, I just wanted to make sure that my phone is not damaged.

  • There is quite a huge loss of quality when using 90Hz on very low brightness. I definitely wouldn't say this is normal.

    On very low brightness (less than ~10%):

    • 90Hz has washed out colors and low contrast. This is unusable for example for browsing photos in darkness.
    • 60 and 120Hz have better contrast. Usable, but are still a bit washed out.
    • 60Hz with DC dimming has, I'd say, normal contrast and colors, but the display shows weird stripy texture when displaying large areas of gray color. This is quite annoying when for example reading webpage or using app with gray background.

    I owned Pixel 2, which only supported 60Hz, it had even lower lowest brightness and I do not remember anything like this.

    Will this possibly be addressed and resolved in future updates? Or is it possible that there are some "bad" batches of displays?

  • Probably OLED panels having higher refresh rates behaves same on 90hz & about pixel 2 it was only a 60hz OLED panel. And about overall display quality it will be tunned with every possible update. But you can still share some proofs which will make more easy for developers to dig into & address the issue more clearly.


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