Do I need an new phone,or can I fix it?

Hey! Okey, I lost my phone and it cracked. Few weeks later my friend lost it and black dots on the screen apperd, they would not go away, only move and it's like the Pixels have died. Of course my lil brother managed to crush it even more, now the screen light turn darker, lighter, black and white, more colurful and less etc.. and suddenly it turns black with purple stripes. My phone is now completly useless! The question is; if the screen is fixed, would the problem be solved, or do I have no other option than a new phone?

Here are som links to pics, that are similar to my screen ;

*the black dots*

Black Blotch on screen, no cracks

*the stripes*

http://forums.androidcentral.com/verizon...

Screen not working after replacement

Ps; i dont know if it means anything, but I can still charge it, it still works that way.