Author Topic: Acer EB321HQ Awi Review: Glossy* 1920x1080 IPS  (Read 2739 times)


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Re: Acer EB321HQ Awi Review: Glossy* 1920x1080 IPS
« on: March 26, 2019, 07:53:22 pm »
Preset Color Accuracy

DSC_0814 by Dr NCX, on Flickr

Acer EB321HQ awi Color Preset Chart by Dr NCX, on Flickr

The second set of colorimeter measurements in my preset color accuracy chart were taken once I improved the gamma by changing the black level setting from 5 to 3, and reduced the menu brightness to 40/100 to output 140cdm/2 which pairs well with my 2200 lumen 6500K LED ceiling light.

The Acer has excellent preset color accuracy and beautiful image rendering, but it is not perfect since the preset gamma is slightly too now and non-linear, and because the Acer fails to completely cover the SDR (HDTV/REC 709 and sRGB) color spaces, however, these flaws are forgive-able when considering the size and price of the monitor, and fact that they're minor.  The gamma is non-linear and averages around 2.0, and the preset RGB levels are not perfectly linear, but they're extremely accurate to the point that the Acer does not suffer from an obvious preset color dominance unlike most displays, as well as is more accurate than many far more expensive monitors.  On paper an average gamma of 2.0 is mediocre, but the 0-30% white, or the gamma of dark greys average around 2.1 which prevents the monitor from looking obviously washed out.

Acer EB321HK vs Viewsonic VP2780-4K Color Gamut Comparison

Acer vs Viewsonic 5 by Dr NCX, on Flickr

As shown above, the Acer's color gamut (white triangle) is a bit miss-matched versus the sRGB gamut (dark triangle) since the Acer over-extends on the right side angle resulting in over-saturation, and undercuts slightly on the left side and bottom right resulting in under-saturation.  The Acer does not suffer from obvious flaws, even though it over-saturates greens, oranges and yellows and minor under-saturation of reds and pinks by around 10%.  Some colors can not be displayed properly, but these flaws are minor, forgive-able when considering the price, and only noticeable to trained eyes comparing the Acer to a very accurate and calibrated monitor like my ViewSonic VP2780-4K used for comparison.

Acer EB321HK Default Gamma: Black Level 5 vs Level 3

Acer EB321HQ Black Level 5 Default vs Black Level 3 by Dr NCX, on Flickr

The preset gamma is not low enough to make the Acer look washed out, and the image quality can be improved by changing the Black Level setting from 5 to 3, though it is not possible to achieve linear 2.2 gamma without calibration.  Once the Black Level is changed the Acer looks beautiful and comparable to vastly more expensive monitors like my calibrated 4K Qnix UHD32R which uses the same coating, and my calibrated 4K ViewSonic VP2780-4K which uses a matte coating.  The Acer is accurate enough out of the box for non-professional work which requires accuracy, and its preset image quality is far above average for multi-media use due to its perceived black depth increasing white bezel, accuracy and low glow panel.
« Last Edit: May 18, 2019, 06:18:52 pm by NCX »