OLED stands for Organic Light Emitting Diode

Typical LCD screen requires backlight and in usual case uses fluorescent backlight. Newer mode advance tech uses LED backlight. LED in this sense is the typical white colour LED. OLED is different because the backlight is not generated by any other means but the LCD screen itself. This tech enables the specific part of the screen to glow and glow in the amount required to produce the clarity and brightness. Other areas that do not need light (example black colour) will not light.

OLED gives, more contrast colour and blacker black compared to typical LCD. The organic thing glow when a low voltage is applied and by making specific area glow only means u get more efficient energy consumption. OLED screens typically squeeze less juice than the LCD n yet produces better pictures.

For typical LCD, the backlight's brightness is fixed, its like a panel of white light.

Our N85 uses AM OLED (Active Matrix OLED), supposedly has a lifespan of 30,000 hours. OLED main disadvantage is short lifespan. Normal OLED can lasts only around 15,000 hours compared to LED backlight which lasts at least 60,000 hours. This AM OLED is much improved such that it's lifespan is not double that of typical OLED.

Above explanation is pretty layman in my own words, certainly not structured properly, hope u can understand what i am saying