First the difference bettewn amoled and lcd is amoled and oled works on a single pixle light which means a single pixle has its own light so there will be completely dark in the background, in lcd better known as liquid crystal display. Works by using back light which means the display design the pixels the back light lights(glows )it so the diffrence is amoled and oled have good color quality ,lcd has good color contrast. But the oled and amoled is expensive and the have side effects which is called “oled burnin” which means if it starw at same spot for more than 10hours the display burn in so in always sees the burin spot,and oled is mostly used in iphone or ipad pros , but amoled is used on most Samsung, lcd is commonly used in mosts phones