1. Different production environment requirements
Evaporation must first be performed in a vacuum, that is, in an apparatus called a vacuum chamber. The manufactured large LTPS backplane is color-patterned in a vacuum chamber. The inkjet printing technology can also be produced under normal pressure.
2. The difference in production costs
Evaporative OLEDs require large-size fine metal masks, which makes this process unsuitable for the manufacture of large-size panels. The manufacturing cost of the inkjet OLED process is lower. In the use of OLED panel raw materials, printed OLEDs can save about 90% compared to evaporation technology.
3. Raw material utilization efficiency
The evaporation efficiency of the organic light-emitting material of the evaporation type OLED screen is high, but the utilization rate is low. The organic material gas is deposited on the glass substrate without any difference during evaporation, so the material utilization rate is low; the ink dripping onto the substrate outside the inkjet OLED process Less, can improve the efficiency of material use.
4. Large size applications
For the production of vapor-deposited OLED displays, the substrate required for large-sized display panels should be higher than 8th generation. Inkjet printing technology can be used in various types of display process. Compared with vacuum evaporation, inkjet is Large area equipment has more advantages.