OLED – Organic Light-Emitting Diode – is a type of display technology that makes it possible to reach dark black levels from ultra-thin screens while, at the same time, making TVs more efficient and eco-friendly.
Here’s how OLED technology works: an organic, carbon-based film is placed between two conductors and, when an electrical current is passed through, it emits light.
This process takes place in every single pixel in an OLED display.
This differs from an LCD (Liquid Crystal Display) panel, which requires a backlight (typically made of standard LEDs) to light up the liquid crystals and create an image. Not only does this require a lot of energy, you also can't achieve true blacks as the backlight affects neighbouring pixels.
With an OLED panel, the organic pixels are self-emissive, which means they generate their own light - and so can become pitch-black when turned off.