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Joined on: July 28, 2016
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Does anyone have an issue with the screen having jelly effect? And do you know if this can be fix with an software update or is it a hardware problem? Thanks
That shouldn't be an issue with the Axon 7, the panel has a refresh rate of 60Hz and is refreshed in the standard way (no upsidedown panel). Are you able to record a video of the issue?
A standard camera should be able to capture it,e.g.,
It only happens in the parts of the screens that are black I will try to record it.
If it is slightly slower pixel response time for very slight transitions between shades that are all almost completely black and black, then that is a limitation of AMOLED displays.
All AMOLED displays have this behavior, while it has been reduced over the years, it is still the case that on an AMOLED display, transitioning a pixel from a luminance value of 1 to a luminance value of 0, will take longer than transitioning from a value of 2 to a value of 255.
The reason for this, is that the structures to carry energy to the pixels will always have some amount of capacitance, and thus when you want to do 100% black and you pull the pin leading to the pixel to ground, the energy will not instantly disappear. Compared to other AMOLED based displays on devices in this range, the Axon 7 does a better job at keeping that behavior under control, though in those cases, it is never a jelly effect, but instead a slight trail behind the object as it moves across the screen.
You will also notice this behavior in IPS displays also, but in the case of those panels you get a similar amount of persistence across the luminance range.
The only way to partially mitigate that, will be a pixel overdrive (some computer monitors offer it), though there is a tradeoff to using it, it increases motion detail at the cost of color accuracy. Most ALOLED display makers will not do this tradeoff as one of the key selling points of the panel type (especially for AMOLED TVs, is the massive color gamut).
In the case of the Axon 7, ZTE did not constrain the gamut in software, so there is a chance for shades that would normally be clipped to black, to instead be reproduces if the input value calls for it, and if it is near the minimum luminance value a pixel can be driven at, the response time of the pixel will become slightly slower when transitioning to black since it simply cannot turn off/ drain the energy out of the pixel fast enough.
Thanks very much. It was very useful. It's my first phone with amoled display and I don't know if it was normal or not