Can I replace my screen with IPS one?

It's really hard to take screen with different display , neither TN , IPS , or anything like that.

You can do it, but it's really hard as i said because you will have to test a lot of monitors to find the compatible one, even though you will have the right code.This doesn't mean that it will be compatible with your laptop.

Yes you can replace it. There are a lot of tutorial available online. You can find for B156HAN01.2 replacement IPS screen and replace it with your current TN Panel

As long as the pinout and connector type on the replacement panel matches the old one (a lot of Haswell-present laptops use iDP instead of LVDS now), it’s doable. However, the Y series is harder then most laptops because Lenovo decided to fuse the screen to the glass with UV LOCA glue.

On the Y700, the screen is fused to the glass assembly across the board, but the Y50 *may* be salvageable. However, the problem is if you have a touch screen assembly, it shares the same fused design as the Y700. You’re good if it’s non-touch, but if it’s touch that may be a problem. It does sound like it’s non-touch since you mention it isn’t IPS, so that’s going to work in your favor.