LED is an abbreviation for light-emitting diode, which is made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), etc. When electrons recombine with holes, visible light can be emitted, making it possible to manufacture light-emitting diodes. LEDs can efficiently convert electrical energy into light energy and have been widely used in displays and lighting.
LCD is the English abbreviation for Liquid Crystal Display, which is a general term for liquid crystal displays. It is a digital display technology. Liquid crystals themselves do not emit light and rely on the backlight box behind them for illumination, just like an advertising light box.
Simply put, LCD screens and LED screens use two different display technologies. LCD screens are composed of liquid crystals, while LED screens are composed of light-emitting diodes.