OLED is the abbreviation of English Organic Light-Emitting Diode, which is translated as organic light-emitting diode or organic light-emitting display. In fact, this light-emitting principle was discovered as early as 1936, but it was not until Kodak launched the OLED double-layer device in 1987 that OLED attracted people's attention as a commercialized and excellent-performance flat-panel display technology. More than 100 research units and companies around the world have invested in OLED R&D and production, including display giants in the market, such as Samsung, LG, Philips, Sony and other companies. Generally speaking, the industrialization of OLED has begun. Monochrome, multicolor and color devices have reached mass production levels, and large-size full-color devices are still in the research and development stage.
Many netizens tend to associate OLED with LED backlights, which are much hyped by manufacturers. In fact, OLED and LED backlights are completely different display technologies. OLED emits light by driving the organic film itself with current. The light emitted can be monochromatic colors such as red, green, blue, and white, and can also achieve full-color effects. So OLED is a new light-emitting principle different from CRT, LED and liquid crystal technology. Its light-emitting mechanism is: driven by external voltage, the electrons and holes injected by the electrode combine in the organic material to release energy, and transfer the energy to the molecules of the organic light-emitting material. The latter are excited and transition from the ground state to the In the excited state, when the excited molecule returns to the ground state, it undergoes a radiative transition to produce luminescence. (Tip: What is a hole? An electrically neutral atom has an equal number of positive protons and negative electrons. Since there is one less negative electron, there will be a positive hole there. Empty, this is a hole.)
