OLED printers are a specific type of printer that uses organic light emitting diode (OLED) technology. This technology uses organic materials that glow when activated by an electric current. While this is a relatively new technology in printing, it is already widely used in televisions and mobile phone displays. OLED printers offer a very high level of detail and can print on a wide range of materials, including flexible substrates. In the future, these printers may open up new possibilities for the production of flexible, scrollable or foldable displays.