OLED becomes the "star" of the display industry. Jinghui Electronics tells you where the advantages of self-luminescence come from
OLED light emission generally includes the following five basic physical processes:
1. Positive and negative charges are injected into the organic layer from the anode and the cathode, respectively.
2. Under the action of the electric field, the positive and negative charges move in the organic layer toward the opposite electrode, respectively.
3． Positive and negative charges recombine at specific locations within the organic layer and release energy.
4． After a certain organic molecule obtains this energy, it is excited by itself or transfers energy to other molecules, so that its excitation transitions from the ground state to the excited state.
5. Molecules in the excited state return to the ground state, releasing light energy.
The liquid crystal display has low driving voltage, many varieties, and it has the advantages of large-scale production technology, especially the increasingly mature TFT technology, and the already formed market advantages. However, its display mode is a passive type, which requires a light source. In addition, LCD still has problems such as slow response speed (afterimages appear), and difficulty in achieving high brightness. OLED can just overcome these shortcomings. Its response speed is more than 1000 times that of liquid crystal, and its brightness is far superior to liquid crystal.