Three-Minute Tech: AMOLED These days, you'll often see smartphones touting the superiority of their AMOLED (Active-Matrix Organic Light-Emitting Diode) or Super AMOLED displays. LG even touted the tech in a large TV . OLED (or AMOLED) display technology is great, and has a lot of benefits, but it isn't quite ready to replace all our LCDs just yet. Here's what you need to know about it. How an LCD works A Twisted Nematic LCD panel [source: PCWorld] To begin with, I should describe how a traditional liquid-crystal display works. There are many types of LCDs, but all the ones in use today on smartphones, laptops, monitors, and TVs all work in basically the same way. A backlight (it can be flourescent lights or LEDs) shines through a film that polarizes the light. Then, it passes through the liquid crystal itself: this is the part that either blocks the light or lets it through, depending on whether or not it's charged with electricty. The light...