I recently purchased a Hisense U9DG. Picture quality looks great when using TV’s native android interface. But first thing I noticed when I plugged in my ATV is this weird effects on the screen. It shows on any background with a solid or close to solid colored background.
here’s some photos of what I’m talking about. Not sure what to call it. It’s not dirty screen effect..
Thanks for the reply. I did some tweaking and found out that this ONLY happens when Dolby Vision is enabled. I switched over to the ATV 4k(3rd Gen) and with Dolby vision disabled, HDR10+ enabled, and match dynamic range on, menu screen, and content not supporting Dolby vision looks fine. And with Dolby vision content, it’s hardly noticeable. Seems that Apple and Hisense doesnt work well each other. Or it’s just an Apple TV issue with processing Dolby Vision.
Thanks for the reply. I did some tweaking and found out that this ONLY happens when Dolby Vision is enabled. I switched over to the ATV 4k(3rd Gen) and with Dolby vision disabled, HDR10+ enabled, and match dynamic range on, menu screen, and content not supporting Dolby vision looks fine. And with Dolby vision content, it’s hardly noticeable. Seems that Apple and Hisense doesnt work well each other. Or it’s just an Apple TV issue with processing Dolby Vision.
Picture #2 shows very well that smooth gradients are problematic. That shouldn’t happen, obviously.
Colored bands in areas of uniform color are a known *** for this model TV. [1] This has to be attributed to image post-processing by the TV itself. That may differ between antenna input and HDMI input. Contact Hisense Support about TV settings that minimize this effect.
Interesting. I see the same banding in all Dolby Vision content (not just the UI) if it is sent at 60hz.
If I enable "Match Frame Rate" and the content is something like movie at 24hz/fps then yes, it looks fine. If I leave Match Frame Rate off, so all content is converted to 60hz, it all exhibits the banding, to a greater or lesser degree, depending not the scene.
Still hard to pin down with vendor needs the firmware update to resolve this. I feel confident all the related hardware is capable of producing the correct results, someone has a bug. But it's such a corner case and so hard to explain to support folks, like you I'm feeling like giving up...
Oh yeah. We’re definitely having the same issue. Hisense is also blaming Apple on my end. But it doesn’t really bother me anymore since Dolby Vision looks great outside of the Home Screen or any home page on any app. I still much prefer using my Apple TV vs my tv’s native android interface.
I hope it gets fixed somehow in the future though!
See also my recent post for U8H here Apple tv 4k color banding in dolby vision… - Apple Community
I’ve researched this a lot (with no resolution), still working with Hisense on it.
Note, you can work around the issue using the 30hz DV setting too.
Screen/picture quality is off on Hisense U9DG and ATV 4k
