Dpak4u

Nov 01, 2024 12:11 PM By  Adam Babcock

Hey there. I think there might be a slight misunderstanding here. Our uniformity test doesn’t just look at the center of the screen, it looks at the entire screen. The cross in the center for the black uniformity test isn’t what we measure, it’s just a tool used to make sure that the backlight remains on, otherwise many TVs would simply turn the backlight off with a black uniform test pattern.

Understood, I suppose I figured manufacturers could focus on something like your test and ensure it performs well by strategically placing dimming zones. Thanks for the explanation!

Has there ever been any thought given to randomizing the location of the test pattern for black uniformity?

While I understand the need for a uniform test across all TVs, I also wonder if manufacturers could be pinpointing certain tests from RTINGS and other outlets to perform exceptionally well on them.

Maybe you could use the uniform location you’re currently using (center of the screen) and then also on a random location on the screen to highlight whether or not the TV performs differently?

Mar 28, 2024 02:03 PM By  Pascal Messiaen

Hi DoubleA, Thanks for taking the time to reach out with your suggestion! It would be great to see the difference calibration makes in real scenes in picture form. It could be challenging for pictures to show the differences under a certain differential between pre and post-calibration color accuracy, especially with TVs that are quite accurate out-of-the-box, but we expect it would be quite easy to spot for TVs which have accuracy issues from the get-go. I will add your suggestion to the list that we review when planning our future TV test bench updates. That way, we’ll assess and prioritize it relative to other work in our pipeline! Don’t hesitate should you have any other suggestions or if you have questions for us. Regards

I appreciate the response along with your insight into potential issues/benefits of adding this to reviews. Thanks!

When it comes to color accuracy testing, I’m wondering if it would be possible to add a picture of an image both pre and post calibration? While it wouldn’t necessarily be as data focused as the current graphs showing color inaccuracies, I think it would help show a more “real world” example of what a TV looks like out of the box and how much improvement a calibration makes in real world content. Just a thought.

Oct 20, 2023 09:38 AM By DF

4

Do you see dithering in PC Mode 4k@60Hz with Chroma 4:4:4?

Haven’t tried it. It’s our bedroom tv so I’d have to pull it back down off the wall to plug in a source capable of that signal. If I do, I’ll let you know.

Thanks for responding. I think you’re correct in that it’s probably a size variant specific issue. I should note that it’s not noticeable at viewing distance.

Interesting. Thanks for the response! I thought it was very unusual that I had never seen retention from the timer in any previous TV reviews.

@mario64: They do recommend disabling local dimming if you’re watching content that has subtitles as it creates noticeable blooming. I obviously don’t know for sure but I would imagine you would still be better off enabling local dimming in any HDR content that doesn’t have subtitles. Hope this helps.

Aug 19, 2019 11:44 AM By rruest89

19

Does the screen uniformity change when viewing off-axis? There are report of this.

The screen uniformity does change a bit but I don’t have the prominent vertical banding that their unit has. In normal viewing, I would need to get way past a sensible viewing angle for any VA panel in order to get problematic uniformity issues.

I may have gotten lucky and got an exceptionally good unit in this regard. The 2017 Vizio M-series I talked about in a different thread had worse uniformity even though it was a 50” unit.

I also was surprised by the DSE and gray uniformity issues on their test sample. I have the same exact 65" set and mine is substantially better in both areas, particularly the gray uniformity.

I should’ve clarified in my first post that the issue I eluded to would be with the test unit and not their testing. I do like a brighter image in general so I tend to run the backlight at 100 most of the time. This could explain my supposition of a possible issue.

After thinking about it some more, I suppose the difference that I’m seeing between the objectively brighter 2017 variant and this one is the nearly doubled contrast ratio of the 2019 model. Without even having my two units side by side I could tell a large difference in contrast ratio between the two. Side-by-side the difference is significant. This could certainly be the reason I feel the 2019 variant is brighter.