What is the light source in an OLED display?

In an OLED (Organic Light Emitting Diode) display, the light source is the OLED material itself. Unlike traditional LCD displays that rely on a separate backlight to illuminate the screen, OLED technology creates light through the electroluminescence of organic compounds when an electric current is applied. This allows each individual pixel to emit its own light, enabling deep blacks and vibrant colors as pixels can be turned off completely to achieve true black levels. This distinct approach eliminates the need for a backlight, resulting in a thinner display, better contrast ratios, and wider viewing angles.

The other options involve traditional light sources that do not apply to OLED technology, as they are commonly found in displays like LCDs but do not serve as the light-emitting mechanism in OLED screens.