What display technologies are OLED and micro led?

OLED (organic light emitting diode), also known as organic light emitting semiconductor display (OLED). OLED is a kind of current type organic light-emitting device, which emits light through carrier injection and recombination. The luminous intensity is directly proportional to the injected current. Under the action of the electric field, the holes produced by the anode and the electrons produced by the cathode will move, inject into the hole transport layer and the electron transport layer respectively, and migrate to the light-emitting layer. When the two meet in the light-emitting layer, energy excitons are generated, which excite the light-emitting molecules to generate visible light. As OLED has long been popular and belongs to a relatively mature technology, it will not be described here.

Micro LED technology was created in 2000 by a research group led by two professors, Hongxing Jiang and Jingyu Lin from Texas Institute of technology. Of course, the first time consumers saw the screen using micro LED technology is Sony's 55 inch Full HD Resolution "Crystal LED display" product, which was officially unveiled in 2012. At that time, the technology was much better than its competitors in both contrast and color gamut.

Of course, but Sony products using this technology are very expensive, and due to the very low production capacity, there is basically no possibility of mass commercialization. But this did not organize companies and enterprises to continue to invest and improve micro LED technology. Industry insiders said that micro LED technology has been very close to the level of commercial mass production.