Author Topic: AHVA - IPS - PLS VS TN VS VA  (Read 18920 times)

NCX

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AHVA - IPS - PLS VS TN VS VA
« on: April 16, 2019, 12:08:04 am »
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NCX

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« Last Edit: July 01, 2019, 06:00:32 pm by NCX »

NCX

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Re: AHVA - IPS - PLS VS TN VS VA
« Reply #2 on: April 16, 2019, 12:10:27 am »
TN=Bad Viewing Angles

Work In Progress

AOC AG271QG (AUO AHVA):

Source=PRAD

The AOC AG271QG is one of the best 2560x1440 144-165hz monitors with Nvidia G-Sync.  Best Reviewed Flicker Free 144-165hz 1440p Monitors with performance summaries and dozens of review links.
 
AOC AG273QCG (AUO TN):

Source=PRAD

The AG273QCG is a mediocre 2560x1440 144hz AUO TN panel.

Asus VG279Q (AUO AHVA):

Source=PRAD

The Asus VG279Q is the best tested 144hz 1080p monitors.  Best Reviewed Flicker Free 1080p 144hz Monitors with performance summaries and dozens of review links.


ViewSonic VX2458-mhd (AUO TN):

Source=PRAD

The ViewSonic VX2458-mhd is one of the best tested 144hz 1080p AUO TN panels.  Best Reviewed Flicker Free 1080p 144hz Monitors with performance summaries and dozens of review links.

NCX

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TN & VA Gamma Shift
« Reply #3 on: April 16, 2019, 12:10:58 am »
TN & VA Gamma Shift

TN panels suffer from vertical gamma shift: their colors and shades are uneven from top (top quarter is too dark) to bottom (bottom half is washed out), as well tend to have more banding, and always have vastly less wide, or more restrictive viewing angles, though all LCD panel types look the worst when viewed from above, or looked down at.

VA panels suffer from horizontal gamma shift which causes the sides of VA panel to be significantly lighter or washed out compared to AHVA, IPS and PLS panels. VA panel gamma becomes lower, and colors and shades become more washed out the further away from the center.

AOC AG271QG (1440p AUO AHVA Panel):

AOC AG271QG GB Stripes by Dr NCX, on Flickr


BenQ Zowie RL2460 (1080p AUO TN):

BenQ Zowie RL2460 Gamma Shift 15s by Dr NCX, on Flickr


Samsung 43NU7100 (Samsung VA Panel):

Samsung 43NU7100 GB Stripes by Dr NCX, on Flickr


Samsung F2380MX (Samsung C-PVA Panel):

Samsung F2380MX Grey Stripes by Dr NCX, on Flickr


All VA panels suffer from black crush when viewed head on, and reveal detail when viewed off angle horizontally.  Some VA panels are worse than others, and this issue is less obvious when viewed from far away, but all VA panels suffer from obvious black crush.  Also note that the Samsung 43NU7100 has nearly perfectly linear 2.2 gamma and a semi-glossy coating while the Samsung F2380MX has slightly too low gamma (non-linear gamma below 2.2) and is matte.


Samsung 43NU7100 (Samsung VA Panel) Center Crush 1:

Samsung 43NU7100 TO 1886 BL by Dr NCX, on Flickr


Samsung 43NU7100 (Samsung VA Panel) Center Crush 2:

DSC_0393 by Dr NCX, on Flickr

Samsung F2380MX (Samsung C-PVA Panel) Center Crush 1:

Samsung F2380MX Gamma 1 The Order 1886 by Dr NCX, on Flickr


Samsung F2380MX (Samsung C-PVA Panel) Center Crush 2:

Samsung F2380MX Gamma 1 Off Angle The Order 1886 by Dr NCX, on Flickr


Samsung F2380MX (Samsung C-PVA Panel) Center Crush 3:

Samsung F2380MX Gamma 1 Off Angle Full The Order 1886 by Dr NCX, on Flickr
« Last Edit: July 01, 2019, 06:11:32 pm by NCX »

NCX

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Re: AHVA - IPS - PLS VS TN VS VA
« Reply #4 on: April 16, 2019, 12:11:23 am »
AHVA - IPS - PLS VS TN

All TN panels have very restrictive viewing angles and suffer from vertical gamma shift, therefore all TN panels have bad image quality. AHVA/IPS/PLS panel glow is not a problem if viewed correctly, and not in the dark with the brightness cranked:



Since TN panels suffer from vertical gamma shift, their colors and shades are uneven from top (top quarter is too dark) to bottom (bottom half is washed out), as well tend to have more banding, and always have vastly less wide, or more restrictive viewing angles, though all LCD panel types look the worst when viewed from above, or looked down at.

It does not matter if one sits directly in front of their TN panel (correct way to view a TN), or how much one pays, especially since the majority (excluding Dell S2716DG & S2719DGF) of the most expensive 27" 1440p TN panels use grainier/sparklier matte coatings than AHVA/IPS/PLS panels. Calibration can vastly improve inaccurate TN panels, but a TN is a TN, and all TN suffer from obvious vertical gamma shift.

Dell S2716DG (AUO TN) v BenQ XL2420G (AUO TN) v Qnix QX2710 (Samsung PLS):


Dell S2716DG v BenQ XL2420G v Qnix QX2710 by Dr NCX, on Flickr

Calibrated with an X-Rite i1 display pro colorimeter with ICC profile activated to correct the gamma in 2015.


Acer XB271HU (AUO AHVA) vs Dell S2716DG (AUO TN):


Acer XB271HU vs Dell S2716DG by Dr NCX, on Flickr

Calibrated but connected to a PS4 so there's no gamma correction; both monitors have non-linear and low-ish gamma below the target of linear 2.2


BenQ Zowie RL2460 (AUO TN) vs Qnix QX2710 Multi Hot (AUO AHVA):

BenQ Zowie RL2460 AUO TN vs Qnix QX2710 Multi Hot AUO AHVA by Dr NCX, on Flickr

Calibrated but connected to a PS4 so there's no gamma correction; both monitors have nearly perfectly linear 2.2 gamma and are extremely accurate.
« Last Edit: April 16, 2019, 12:46:23 am by NCX »

NCX

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Re: AHVA - IPS - PLS VS TN VS VA
« Reply #5 on: April 16, 2019, 12:11:59 am »
Are 27" 1440p TN panels Better? No

I reviewed the Dell S2719DGF (144hz 2560x1440 8 bit AUO TN from 2018) which has better image quality than the S2716DG (144hz 2560x1440 8 bit AUO TN from 2015) , but has worse image quality than the BenQ Zowie RL2460 since it can properly cover SDR (HTDV/REC 709 & sRGB) color spaces while both Dell monitors over and under-saturate colors, as well as can come with low preset gamma (the S2719DGF I tested came with sub 2.0 preset gamma):


e by Dr NCX, on Flickr



BenQ Zowie RL2460 vs Dell S2719DGF Calibrated Color Gamut Comparisons::

BenQ Zowie RL2460 vs Dell S2719DGF Color Gamut Comparison by Dr NCX, on Flickr

The BenQ Zowie (6 bit +FRC AUO TN panel) can fully cover both SDR color spaces (HDTV/REC709 & sRGB) without any under-saturation and only a bit of under-saturation while the Dell S2719DGF significantly over and under-saturates some colors compared to both the HDTV/REC 709 and sRGB color space, and does so significantly more when un-calibrated.  When un-calibrated it significantly over and under-saturates some colors compared to both the HDTV/REC 709 and sRGB color space.  The top left side of the triangle (HDTV/REC 709 color gamut) falls short resulting in the under-saturation of blue and medium to dark greens. Medium to light greens, yellows, oranges and some reds are all over-saturated, a phenomenon typical of AUO panels, including both their 27" 2560x1440 and 32" 3840x2160 AHVA (more balanced or pure) panels which also over-saturate the same colors resulting in green and yellow tints to browns, greys and whites, even after calibration.

Keep in mind that the S2719DGF is calibrated and has its gamma fixed in the below comparison versus being too low out-of-the-box and significantly more washed out.  Click here to see comparisons of the Dell pre-calibration or un-calibrated versus calibrated to see what a unit with low-preset gamma looks like.

1.)  AOC AG271QG (AUO AHVA) versus Dell S2719DGF (AUO TN) calibrated with a Spectracal C6 HDR 2000:

AOC AG271QG vs Dell S2719DGF STALKER CLEAR SKY 2 by Dr NCX, on Flickr


2.) AOC AG271QG (AUO AHVA) versus Dell S2719DGF (AUO TN) calibrated with a Spectracal C6 HDR 2000:

AOC AG271QG vs Dell S2719DGF STALKER CLEAR SKY 1 by Dr NCX, on Flickr


3.) AOC AG271QG (AUO AHVA) versus Dell S2719DGF (AUO TN) calibrated with a Spectracal C6 HDR 2000:
[
AOC AG271QG vs Dell S2719DGF 3 by Dr NCX, on Flickr

NCX

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Re: AHVA - IPS - PLS VS TN VS VA
« Reply #6 on: April 16, 2019, 12:12:22 am »
Banding

Dawn Engine Banding by Dr NCX, on Flickr

AUO TN panels tend to suffer from very obvious and frankly horrific banding when viewing the above Dawn Engine image, as well as when viewing this 60fps Westworld trailer.  These three monitors all suffer from the same obvious banding when displaying the above image

Dawn Engine Banding

Dell S2417DG Banding 2 by Dr NCX, on Flickr


Westworld Banding
Spoiler (hover to show)


The BenQ Zowie RL2460, Dell S2719DGF and ViewSonic VX2458-mhd (all tested by me) are free from very obvious banding when viewing both the Dawn Engine image and Westworld trailer both before and after calibration, but I did see minor banding and compression artifacts not present on my AHVA, IPS and PLS panels when viewing some dark content on the TN panels listed above.  The banding is caused by both the source and the monitors.  If I zoom in very closely to the Dawn Engine image on my ViewSonic VP2780-4K (8 bit +FRC 4K IPS with 14 3D LUT) a tiny bit of banding is preset.  Here are the BenQ Zowie RL2460 and ViewSonic VX2458-mhd

BenQ Zowie RL2460 TN Panel Dawn Engine Lights On
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Qnix QX2710 PLS Panel Dawn Engine Lights On
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Samsung F2380MX C-PVA Panel Dawn Engine Lights On
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ViewSonic VX2458-mhd TN Panel Dawn Engine Lights On
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When the lights are off a bit of banding is visible, especially on the F2380MX which performs the worst despite using a true 8 bit panel, though the banding is only very obvious when viewing the monitor off angle.

None of the monitors mentioned suffer form obvious banding when displaying this screen shot from The Order 1886 which I display and take a photo of every monitor I test

Reddit Posts with banding:
from r/Monitors

from r/Monitors
« Last Edit: May 14, 2019, 01:11:54 am by NCX »