A light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared (IR) light. Infrared LEDs are used in remote-control circuits, such as those used with a wide variety of consumer electronics.

LEDs have many advantages over incandescent light sources, including lower power consumption, a longer lifetime, improved physical robustness, smaller sizes, and faster switching.

OLED

Organic light-emitting diode is a type of light-emitting diode (LED) in which the emissive electroluminescent layer is an organic compound film that emits light in response to an electric current. OLEDs are used to create digital displays in devices such as television screens, computer monitors, and portable systems such as smartphones and handheld game consoles.

OLEDs are fundamentally different from LEDs. An OLED display works without a backlight because it emits its own visible light. They emit their own light rather than requiring a backlight, leading to incredibly crisp colours. They also switch off completely when not needed, creating a truer black and a rich contrast, as well as incredibly quick refresh rates ideal for movies and gaming.

OLED vs Q-LED

Q-LED stands for quantum-emitting diode. OLED has no back light and can therefore create perfect blacks and incredible contrast. But it can also be clearly viewed from any angle, housed in the thinnest TVs imaginable and even used in a curved television. a Q-LED 8K TV uses LCD technology with a quantum dot film over the top. Rather than being a new form of technology, it is simply an extension of LCD.