The OLED (organic light-emitting diode) provides the hobbyist with an exciting form of low-cost display. Because they are based upon LEDs, they require no backlighting like an LCD device does, nor polarizing filters. This equates to lower cost.
The OLED device used in this chapter is monochrome, though it may display two colors in addition to black. That sounds contradictory, but the monochrome nature just means that it only displays one color for a given pixel. OLEDs with dual colors will have a band of pixels in one color, with the remainder in another. The background is always black (LED not lit).
The devices ...
