Blur Busters Forums

Kamen Rider Blade wrote: ↑

30 Jul 2021, 03:38

8-Bit panel ain't good enough when 10-bit HDR is pretty common for TV's and alot of gaming panels are starting to support 10-bit HDR.

Chief Blur Buster wrote: ↑

30 Jul 2021, 16:14

Kamen Rider Blade wrote: ↑

30 Jul 2021, 03:38

8-Bit panel ain't good enough when 10-bit HDR is pretty common for TV's and alot of gaming panels are starting to support 10-bit HDR.

On non-locally-dimmed LCDs (even HDR), 8bit+FRC is practically indistinguishable from 10bit when it comes to high-Hz LCDs, because:

For a 165Hz 8bit+FRC system
(A) FRC simply adds 1/256 flickering temporally spaced 1/165sec apart, at near-retina spatially
(B) It's hard to see 2 adjacent single-pixels 1/256 color levels apart
(C) It's hard to see flickers 1/256th brightness on the same pixel spaced 1/165ec apart at far above your flicker fusion threshold ability for such faint color flickers
(D) HDR mapping will spread over the limited brightness level range of a non-locally-dimmed LCD of 1000:1 to 5000:1 contrast

Thus, non-local-dimmed high-Hz retina-rez 8bit+FRC is just as good as 10-bit native.

YMMV of course, and FRC algorithms can be crap, but it's thousands times fainter DLP pixel flicker (of their binary 1-bit full ON/OFF temporal dithering). It's sometimes noticeable for 6bit+FRC especially non-temporally compensated for moving patterns (e.g. contouring in TestUFO tests).

The biggest problem with FRC is generally contouring, such as what you see doing www.testufo.com/photo on some 6bit+FRC displays. Now, contouring can degrade 10bit to 8bit, the one situation where you might notice for HDR content especially that's non-locally dimmed or OLED, but that's far better than 8bit degrading to 6bit.

Also even local dimming on LCD will bloomzone bigger than the adjacent pixels (item (B) and (C) will still apply in the local areas), so even local dimming LCDs will still not yet usually not have noticeable 8bit+FRC issues, except in very rare circumstances. Now bring OLED into the equation and have much more dynamic range to even spatially adjacent pixels -- then we'll have more visibility problems with 8bit+FRC if we had such an OLED doing 10bit versus 8bit+FRC (if such OLEDs were developed to do so).

Kamen Rider Blade wrote: ↑

30 Jul 2021, 22:09

Have you had a chance to check out this Hi-Sense Dual-Stacked LCD tech?

Chief Blur Buster wrote: ↑

31 Jul 2021, 23:50

Kamen Rider Blade wrote: ↑

30 Jul 2021, 22:09

Have you had a chance to check out this Hi-Sense Dual-Stacked LCD tech?

Yep -- I saw it at DisplayWeek 2019.

It looked fantastic and OLED quality when viewed head-on. Could not see bloom.

If you view 45-degrees axis, there are minor quirks (parallax between two layers) but viewed head on, it looked hard to distinguish from OLED.

Another quirk is that it uses a bit more power due to needing to push light through two layers of LCD, but improved tech such as polarized backlight can help to an extent, and still keep this efficient.

Yes, I'd like to see this technology hit desktop monitors too!