Light-emitting diodes are called
LED for short. It is made of gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N) and other compounds.
When electrons and holes are combined, they emit visible light, which can be used to make light-emitting diodes. Used as indicator light in circuits and instruments, or as a text or digital display. Gallium arsenide diodes emit red light, gallium phosphide diodes green light, silicon carbide diodes yellow light, gallium nitride diodes emit blue light. Because of chemical properties and organic light-emitting diode OLED and inorganic light-emitting diode
LED.
LEDs were initially used for indicative lighting in instruments, then expanded to traffic lights, landscape lighting, vehicle lighting, and mobile phone keyboards and backlights. Later, the new technology of micro-led was developed, which greatly reduced the size of the original light-emitting diode, and used red, blue and green micro-led arrays to form a display array for display technology. Micro light-emitting diodes have the characteristics of spontaneous Light display, higher efficiency than Organic Light Emitting diodes (Organic light-emitting Diodes), longer life, and relatively stable materials are not easy to be affected by the environment.
