Which type of display would you choose if you needed a low current digital output?

When selecting a display for low current digital output, LCD (Liquid Crystal Display) is the most suitable choice due to its inherent characteristics. LCDs use a backlight to illuminate the display, and they require significantly less current to operate compared to other types, especially when displaying static images, making them energy efficient. They primarily function by controlling the light that passes through liquid crystals, which allows them to consume minimal power when compared to other display technologies.

For instance, an LED (Light Emitting Diode) display generates light itself and can consume more current, especially when displaying bright colors or high brightness settings. OLED (Organic Light Emitting Diode) screens offer vibrant colors and deep contrasts but also draw more current during operation due to their self-illuminating nature. CRT (Cathode Ray Tube) displays are much larger and less efficient, consuming more power in comparison to modern display technologies, particularly in a low-power usage scenario.

Thus, for low current digital output, LCD is a practical and effective choice.