The structure and working principle of OLED display?

Surely everyone for OLED displays have some understanding, then for the structure and working principle OLED display is like, it is estimated that we all look ignorant, today Tinto micro OLED display manufacturers come to talk with you OLED display The structure and working principle of the screen.

1 OLED structure

OLED consists of the following parts:

Base layer - the base layer is used to support the entire OLED.

Anode - The anode removes electrons as current flows through the device.

Organic layer - The organic layer is composed of an organic molecule or an organic polymer.

Conductive layer - This layer consists of organic plastic molecules that carry "holes" from the anode. Polyaniline can be used as the conductive polymer of the OLED.

Emissive layer - This layer consists of organic plastic molecules that transport electrons from the cathode; the luminescence process takes place at this layer. Polyfluorene can be used as the emissive layer polymer.

Cathode - When a current flows through the device, the cathode injects electrons into the circuit.

2 OLED manufacturing

The most important part of the OLED production process is the application of an organic layer to the substrate. There are three ways to do this:

2.1 Vacuum deposition or vacuum thermal evaporation

The molecules of the organic molecules located in the vacuum chamber are slightly heated, and then these molecules are condensed in the form of a film on the lower temperature base layer. This method is costly but less efficient.

2.2 Organic vapor deposition

In a low-pressure hot-wall reaction chamber, the carrier gas transports the evaporated organic molecules to the low-temperature substrate, and then the organic molecules condense into a film. The use of carrier gas can increase efficiency and reduce the cost of OLEDs.

2.3 inkjet printing

Inkjet technology is used to spray the OLED onto the substrate as if the ink was sprayed onto the paper during printing. Inkjet technology greatly reduces the cost of OLED production, and can print OLEDs onto very large surface areas for large displays such as 80-inch large-screen TVs or electronic signage.