The Lenovo T2224z has a maximum contrast ratio of 3000000:1. That's 40% less contrast ratio than the most frequently found dynamic contrast ratio of 5000000:1. Across all LCD screens of this age and spec the contrast ratio ranges from Mega Contrast to 100000000:1.
We compared this flatpanel monitor to all the other PC displays that have a 3000000:1 dynamic contrast ratio and we think cheaper flatpanel monitors such as the T2324p[pl_2910663_price], the T2324[pl_2810884_price], and the X24[pl_2901251_price] all from Lenovo is also worth considering.
If you are looking for a PC screen with a higher contrast ratio then you might want to consider the LG 24MB37PY[plb_2884856_price] (5000000:1) which is also cheaper.