The highest contrast ratio of the Philips 220B1CS is 25000:1. That's 100% less contrast ratio than the most common dynamic contrast ratio of 20000000:1. Across all flatpanel monitors of a comparable age and spec to the 220B1CS the best contrast ratio is 100000000:1 and the worst is Mega Contrast.
We compared this LCD screen to all the other flatpanel monitors that have a 25000:1 dynamic contrast ratio and we think because of it's better review score, the MultiSync EA234 (£234.00), and the MultiSync EA244WMI (£331.93) both from NEC is also worth considering.
If you would prefer a PC monitor with a higher contrast ratio then you might want to consider the E2442TC (500000:1), or the 32WL30 (£521.80) (500000:1) both from LG.