Author Topic: Monoprice 27" 4K RTD2795 IPS Review: Matte 27" 3840x2160 AHVA with AMD Free-Sync  (Read 2266 times)

NCX

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I use a single Philips 6500k/Daylight ceiling light (CFL) with 2600 lumens brightness output which pairs well with displays set to 140cdm/2 brightness.

Black Screen lights on 15s exposure, lights off 20s exposure and 25s exposure.

Here are photos of three different matte 3840x2160 AHVA and IPS panels displaying black with my ceiling light (Philips 2600 lumen Daylight/6500k CFL) on, and all monitors set to 140cdm/2 brightness.

Acer XB321HK Lights On (AHVA; 800:1 contrast)
Spoiler (hover to show)

Monoprice RTD2795 Lights On (AHVA; 1000:1 Contrast)
Spoiler (hover to show)

Viewsonic VP2780-4K Lights On(AH-IPS; 1000:1 contrast)
Spoiler (hover to show)

The perceived black depth offered by the Monoprice is outstanding when viewed correctly which requires the following criteria to be met:

+Line up the top of the panel with the top of the viewers head or raise the panel more
+Do not crank the brightness in a dimly lit room
+Use bright enough room lighting to offset the display brightness

When my ceiling light is on the the monitor is set to 140cdm/2 brightness the fake frame-less casing used by the Monoprice 274K reduces the perceived back depth a bit resulting in black in dark scenes looking a tiny bit greyish compared to the inner black bezel, especially when viewed off angle. Bright bias lighting (light placed behind the display) helps, as well as reduces glare since the light is not shining on the display, but the problem still persists which is why I love dark matte grey and silver monitor cases or frames.

What helps the Monoprice stand out is the greatly reduced glow it suffers from compared to most AHVA/IPS/PLS panels when viewed from the correct height. AHVA/IPS/PLS panels vertical viewing angles are awful when the displays are looked down on which is why the top of the panel needs to line up with the viewers head or be higher. One can lean back and view an AHVA/IPS/PLS panel without issue, but can not look down upon one from high above which is what many people who upgrade from TN panels are used to doing.

Here are photos of four different matte 3840x2160 AHVA and IPS panels displaying black with my ceiling light (Philips 2600 lumen Daylight/6500k CFL) off, and all monitors set to 140cdm/2 brightness. They are the Acer XB321HK (AHVA, 800:1 contrast), Monoprice 274K (AHVA, 1000:1 contrast), Qnix UHD3216R (AHVA, 1100:1 contrast) and Viewsonic VP2780-4K (AH-IPS, 1000:1 contrast):

Acer XB321HK Lights Off (AHVA; 800:1 contrast)
Spoiler (hover to show)

Monoprice 274K (AHVA; 1000:1 Contrast)
Spoiler (hover to show)

Qnix UHD3216R (AHVA; 1200:1 Contrast)
Spoiler (hover to show)

Viewsonic VP2780-4K (AH-IPS; 1000:1 Contrast)
Spoiler (hover to show)

The Monoprice is free from obvious back-light bleed and uniformity issues unlike the vastly more expensive (versus competing 32"4K monitors) Acer XB321HK with Nvidia G-Sync in the above comparison. The Acer, Monoprice and Qnix all use low glow AHVA panels, but the Qnix UHD3216R has the best perceived black depth since it has 50% higher contrast and much better uniformity than the Acer. The Qnix also has slightly better perceived black depth than the Monoprice since the Qnix has a sparkly matte black bezel which looks lighter than the Monoprice's inner black bezel. The Viewsonic also has a sparkly matte black bezel, but it is the most reflective and suffers from significantly more glow which causes very dark content to appear to have a milky white haze.
« Last Edit: February 25, 2019, 01:31:12 am by NCX »