Quote from: Vaidyanathan on February 28, 2023, 21:04:16Do you have any orientation suggestion to avoid ambiguity?
I'll give the most thorough answer I can.
Most important to me would be to
keep out any orientations that aren't 0/90/180/270 degrees (or very close). With this panel, it doesn't matter as much, because it's reasonably clear that the blues must run either up/down or left/right. But it matters a lot in phones with diagonal RG/BG matrices.
Examples:
- This photo is good, because it clearly shows the diagonality of the matrix:
iPhone 14 Plus Review- This is ambiguous, because it's unclear whether the true alignment is diagonal (=> RG/BG, PenTile) or horizontal/vertical (=> RGGB, full-RGB).
Xiaomi 12T Pro 5G Review- This one makes the phone's display look like true RGB. If the matrix photo is actually tilted 45 degrees versus reality (reality being that it's also PenTile), then it doesn't highlight the issue, and risks presenting the display as something it's not (true RGB).
Asus ROG Phone 6DSecond most important, in my eyes, would be to make sure
horizontal is horizontal and vertical is vertical.
It seems the first few reviews of this panel did show the correct orientation with respect to X vs Y. However because so many reviews on this site have not shown correct rotations, I wasn't confident until I saw a unit in person. While it's a small detail, I was interested in whether any subtle gaps in solid blue 1px lines would be more prevalent horizontally or vertically. (The blues do run vertically, slight gaps can be seen in 1px blue lines on a black background, but they're a non-issue in practice.)
Thirdly, least important of all but perhaps the easiest to correct, would be 0 vs 180 degree rotations. I'm aware that microscopes like to rotate things 180 degrees, evident by moving the observation target and seeing that the captured image scrolls in the opposite direction. If that's easy to anticipate and correct, then I will leave that to the Notebookcheck team to decide if it's worth watching out for.
Extra:
- This matrix photo is super confusing:
ASUS ROG Phone Review Assuming it's the same matrix as the following:
Nokia X30 Review then it
looks closer to true-RGB at first glance. However checking it with a square selection tool, it appears to have three steps along one axis and only two along another.
- This review doesn't show a matrix!
Huawei Mate 50 Pro ReviewIn general, better analysis on this type of stuff will help consumers become more aware of the issues. Regardless of how a review orients the matrix photo, I don't often see a lot of language to communicate the problems it may have. Advertised display stats are forwarded to the reader without much caution, other than a matrix photo whose rotation may or may not correctly represent the panel. A helpful starter, for example, would be to list "
2400(RG/BG) x 1080" rather than "2400x1080" in the applicable locations.
This, in turn, might help steer manufacturers towards producing more options to fill the gaps, which might even make their way to the standard. We saw this with laptop RG/BW panels going away, and the once-ubiquitous low-quality TN laptop panels becoming much less common. I'm hopeful that mobile device PenTile (alongside harsh PWM in all device categories, which this site already does often report on well) can be next.
Finally, if I may tack on an unrelated issue, I did observe that this panel renders almost-black colors
far too bright. Black is
perfectly black, but very dim colors are represented wildly inconsistently across panel area and brightness settings. Perhaps it's worth replacing the full-black test image in the OLED "backlight"-bleeding tests with one that's
almost black instead. I found that a full-screen image of RGB(1, 1, 1) is sufficient to demonstrate the issue, though I suspect up to RGB(8, 8, 8) could help weed out any software "fixes" in place.
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