The comparison between LED and LCD displays can be a bit nuanced, as "LED" displays are actually a type of LCD display. The key difference lies in the backlighting:

LCD (Liquid Crystal Display):
Uses liquid crystals to control light passing through.   
Traditionally uses fluorescent lamps (CCFLs) for backlighting.   
LED (Light-Emitting Diode) LCD:
Also uses liquid crystals.
Uses LEDs for backlighting, which offers several advantages.   
Here's a breakdown of the key differences and where LED generally excels:

"Are LED displays good?" Let me start by recalling the previous conversation. They first wanted to know what LED displays are, then their invention timeline, and now they're asking if they're good. So they're likely looking for a balanced view to decide whether to use LED displays for their needs.