I can change my notebook screen.

There is two screen full hd in the Lenovo E540 FRU(BOM) List.

1-AUO 15.6 FHD AG(P/N: 00HM130)

2-CMI 15.6 FHD AG (P/N: 04X0529)

what is it different?

I want to ips screen or higher quality screen from on my noteebook.

because Normal colors look like light colors or dark colors look like normal colors.I guess this is because low contrast ratio.

Example picture (