The HE247DPB has a maximum contrast ratio of 40000000:1. That's over two times the contrast ratio of the most frequently found dynamic contrast ratio of 20000000:1. The best contrast ratio of all medium monitors that came out more than two years ago is 100000000:1 and the worst is Mega Contrast.
We think you might also be interested in some of the alternative flatpanel monitors that have a 40000000:1 dynamic contrast ratio currently available including because of it's better review score, the HE247DPB, or the HE225DPB both from Hannspree.
If the contrast ratio of this medium monitor is too low for you then you might also want to look at the AOC E2461FW (50000000:1 and higher rated), or the Asus VS228 ($81.99) (50000000:1 and higher rated); or the Asus VS247 ($118.99) (50000000:1 and cheaper).