HP X34 = 34" Ultra Wide IPS Flat (Yes No Curvature!!!) w/ 165 Hz VRR

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Kamen Rider Blade
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HP X34 = 34" Ultra Wide IPS Flat (Yes No Curvature!!!) w/ 165 Hz VRR

Post by Kamen Rider Blade » 30 Jul 2021, 03:38

https://tftcentral.co.uk/news/hp-x34-wi ... fresh-rate

It almost has everything I wanted in a Wide Screen Panel

I just wish it wasn't 3440 x 1440 resolution. That's a weird 21½ : 9 aspect ratio.

Give me either:
21 : 9 = 3360 x 1440
24 : 9 = 3840 x 1440

This weird 21½ : 9 Aspect Ratio is really throwing me off.

165 Hz VRR has a VRR range of (48-165 Hz). I honestly wish the low end range was a bit lower.

Also, the HDR 400 spec is kinda weak sauce in this day and age

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.

Also, 1x DisplayPort 1.4 and 1x HDMI 2.0 isn't modern enough IMO.

DP 2.0 spec was released on 2019/06-26; they really should've updated to the latest standard.

HDMI is already on 2.1 as well.

But the most important bit, it's effing FLAT, no bloody curves for a wide screen with an Aspect Ratio smaller than 32:9

Wooohoo!!!!!!
Last edited by Kamen Rider Blade on 01 Sep 2021, 00:40, edited 2 times in total.

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Re: HP X34 = 34" Ultra Wide IPS Flat (Yes No Curvature!!!) w/ 165 Hz VRR

Post by Chief Blur Buster » 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).
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Re: HP X34 = 34" Ultra Wide IPS Flat (Yes No Curvature!!!) w/ 165 Hz VRR

Post by Kamen Rider Blade » 30 Jul 2021, 22:09

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

phpBB [video]


The Back-Light Gray Scale panel is only 1/2 the resolution Vertically & Horizontally of the main panel, so it largely eliminates any "Bloom" and looks incredibly good without the crazy costs of OLED.

I want HiSense to brink this "Dual Cell" technology to monitors.

https://www.cnet.com/tech/home-entertai ... ches-3500/

https://www.hisense-usa.com/tv-and-audi ... android-tv

Having OLED like Contrast ratios + brightness that fulfills the VESA specs would be nice.

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Re: HP X34 = 34" Ultra Wide IPS Flat (Yes No Curvature!!!) w/ 165 Hz VRR

Post by Chief Blur Buster » 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!
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Re: HP X34 = 34" Ultra Wide IPS Flat (Yes No Curvature!!!) w/ 165 Hz VRR

Post by Kamen Rider Blade » 01 Aug 2021, 01:41

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!
I wonder how much power & heat they can save if their back plane went with IGZO tech?

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