The highest contrast ratio of the Acer V223WLAObmd is 100000000:1. That's over five times the contrast ratio of the most common dynamic contrast ratio of 20000000:1.
This flatpanel monitor's contrast ratio (100000000:1) is in fact the best contrast ratio amongst all similar spec PC monitors that have been on the market for more than two years.
Amongst similar types of flatpanel monitor the worst contrast ratio is Mega Contrast.
We think you might also be interested in some of the other flatpanel monitors that have a 100000000:1 dynamic contrast ratio currently available including a cheaper PC screen such as the Packard Bell Viseo 243D (£115.99) or you might consider a better rated PC screen such as the Asus VN279 (£239.14).