* Lifetime - While red and green OLED films have longer lifetimes (46,000 to 230,000 hours), blue organics currently have much shorter lifetimes (up to around 14,000 hours.
* Water - Water can easily damage OLEDs.
==Concept Table=={|border="2" cellspacing="0" cellpadding="4" width="55%"|bgcolor = "#B8CCE4"|'''Top emission'''|bgcolor = "#B8CCE4"|'''Organic Light Emitting Diode'''|-|Top emitting|OLED|-|Top emissive|polymer LED|-| |light emitting polymer diode|-| |organic LED|-| |organic electroluminescent diode|-| |FOLED|-| |SM-OLED|-| |small molecule OLED|-||AMOLED|-||PMOLED|-|}
==Control Patents==
