OLEDs work just like a regular LED except the diodes in OLEDs are thinner. Other type of displays, such as LCDs, require an external light source (backlighting) to illuminate the screen whereas OLED displays do not. Energy efficiency is also an advantage of AMOLED displays. It is more energy efficient than LED and other types of displays. This is because AMOLED displays generate less heat while emitting light, allowing for less energy being lost during heat transfer. It is energy efficient in its ability to consume less power as well. It can be utilized well for portable consumer electronic devices, where good battery-life is essential. Because of this efficiency, AMOLED displays can also be considered eco-friendly. Compared to other types of displays, AMOLED displays can produce high refresh rates although LCD leads in that specific area. AMOLED displays also allow to be folded, which manufacturers use to make bezel-less screens that fold behind the display.