The Sharp Memory LCD range comes in sizes from 0.96 inches to 4.4 inches (diagonal). What makes them special is their insanely low power consumption making them ideal for things like watches or anything you want to run on battery power for a long time. Take for example the 1.28 inch Sharp Memory LCD. It runs on a 3V supply and only draws 12 µW to display a static image or 50 µW for a dynamic image. In theory you could display dynamic images for 6 months with a single charge of a tiny 100mAh battery (taking only the screen’s power usage into account of course).
Adding one of these displays to your project is a little tricky due to the FFC connection they use. Fortunately, the LCD breakout board designed by Kuzyatech makes things more accessible routing the FFC connector out to 0.1″ header pins. The board also has the necessary resistors and capacitors for the display populated which is one less thing for you to worry about.
With displays it’s much better to see them in action to get an idea of what they are like. Mike Harrison from mikeselectricstuff has a video all about Sharp Memory LCDs. Check it out!