I you want a one line answer for your Question then its AMOLED.
Let me tell you some basic differences and facts about both the screens:-
LCD Vs AMOLED
LCD, Liquid Crystal Display, has been part of our lives for years now. Besides mobile devices we see LCD screens being used with almost every computer monitor, and in the majority of recent TVs. While these screens are made of wondrous liquid crystals, they also require a couple panes of glass, and a light source. LCD screens produce some of the most realistic colors you can find on a screen, but might not offer as wide of a contrast ratio (darker darks and brighter brights) as AMOLED or OLED.

AMOLED, Active Matrix Organic Light Emitting Diode, technology is actually fairly old but their emergence on the market at high end screens is recent. AMOLED screens consist of a thin layer of organic polymers that light up when zapped with an electric current. Due to this simple construction, AMOLED screens can be extremely thin and don’t require a back light. The benefit of losing a back light is readily apparent: these screens are able to produce blacks so deep that the screen pixels can shut right off. Shutting off pixels can also save electricity and battery life in phones and tablets. Just keep your backgrounds close to black and you’ll save energy.

I you want a one line answer for your Question then its AMOLED.
Let me tell you some basic differences and facts about both the screens:-
LCD Vs AMOLED
LCD, Liquid Crystal Display, has been part of our lives for years now. Besides mobile devices we see LCD screens being used with almost every computer monitor, and in the majority of recent TVs. While these screens are made of wondrous liquid crystals, they also require a couple panes of glass, and a light source. LCD screens produce some of the most realistic colors you can find on a screen, but might not offer as wide of a contrast ratio (darker darks and brighter brights) as AMOLED or OLED.

AMOLED, Active Matrix Organic Light Emitting Diode, technology is actually fairly old but their emergence on the market at high end screens is recent. AMOLED screens consist of a thin layer of organic polymers that light up when zapped with an electric current. Due to this simple construction, AMOLED screens can be extremely thin and don’t require a back light. The benefit of losing a back light is readily apparent: these screens are able to produce blacks so deep that the screen pixels can shut right off. Shutting off pixels can also save electricity and battery life in phones and tablets. Just keep your backgrounds close to black and you’ll save energy.