Tablet [Q] Why my screen is ugly? I think it's Framework res

[CENTER]Hello everyone

I have a problem with my LG L5, I know it's not the best smartphone, but it's bring me a strangle display problem. I have installed some many roms (Paranoid, CM, AOKP, etc.) and all these based in AOSP, My screen is presenting some "grainy" bugs, in all the roms, the problem doesn't shows in the recovery, or in the bootanimation, only in the system, what are you thinking is wrong?

Images attached: 1 2 3

(Yes, it's the real quality of the image, and like this looks in my phone.)

These screenshots are directly from my device, I checked the screen in the phone of my friend with the default kdz ROM and his screen looks clean.

Compare with other device screenshot:

Image attached: 4

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