OLED (Organic Light-Emitting Diode) display technology, as a new light-emitting material, is affecting the development of the electronic equipment industry. With the continuous development of the e-book market, OLED has been widely used as the display technology of e-book readers. The manufacturing process of OLED e-book readers mainly includes the following three aspects: the preparation of OLED display materials, the manufacturing and packaging technology of OLED displays.

Preparation of OLED Display Materials

OLED display materials are the core components of OLED e-book reader display devices, including core luminescent materials, carrier injection/transport materials, electrode materials, etc. The core luminescent material is the main luminescent component of OLED displays, mainly including copper phthalocyanine (CuPc), triphenylamine (TPD), Tazzoflavin (TZFN) and so on. Carrier injection/transport materials are mainly used to improve carrier injection efficiency and stabilize charge transport, etc., mainly including aluminum lithium (Alq3), PBB (1,10-phenanthroline aniline), etc. Compared with traditional organic materials, these materials are more environmentally friendly, more transparent and stable, and can achieve higher color saturation, higher brightness and higher contrast.

The preparation of these OLED display materials is mainly through chemical synthesis methods or physical meteorological methods to achieve mass production and scale of materials.

 

OLED Display Manufacturing Technology

It mainly includes organic material evaporation, organic material blade coating and organic material spraying technology.

1. Organic material evaporation technology

Organic material evaporation technology is a vacuum-based preparation method that transforms organic materials into a gaseous state and forms a thin film on a glass substrate under specific conditions. In this process, the organic material will realize the growth of organic thin films with different geometric structures and different molecular sequences by controlling the substrate temperature, vacuum degree, air pressure and other conditions. This method can achieve high precision, high resolution, and high uniformity of OLED displays.

2. Organic material blade coating technology

Organic material blade coating technology is a technology that focuses on solving the problem of large-area display device preparation. It is a method to reduce manufacturing costs and achieve large-scale production through coating. The OLED display material is coated on the transparent conductive transistor (ITO) substrate to form a coating film layer, and then the substrate is sent to a vacuum evaporator, and the solvent and volatile organic compounds attached to the coating surface are evaporated under vacuum conditions, and finally formed OLED display devices.

3. Organic material spraying technology

Organic material spraying technology is a method that uses a sprayer to uniformly spray organic films. Compared with organic material evaporation and coating technology, organic material spraying technology has lower cost and simpler process.

 

Packaging technology of OLED display

The purpose of OLED display packaging technology is to protect the display panel and encapsulate it in a glass or plastic casing. At present, commonly used packaging technologies include dust-free packaging, thermal compression packaging and vacuum packaging.

1. Dust-free packaging

Dust-free packaging is a popular packaging technology for electronic equipment today, which can prevent dust from entering the equipment and damaging equipment components. At the same time, this technology is also suitable for the packaging of OLED displays. The technology requires advanced clean room equipment and effective construction and maintenance measures to control contamination factors such as sterility and organic matter.

2. Thermal compression packaging

Hot pressing packaging is a kind of rubber, PET, polycarbonate and other materials as a supporting layer, which is tightly combined with the display panel, and packaged under hot pressing conditions. This technology is suitable for devices with low material cost, relatively thin package thickness, and small compression ratio, but it is difficult to apply to package large-sized OLED transistors due to the lack of vacuum technology.

3. Vacuum packaging

Vacuum packaging is a technology that encapsulates OLED display devices in a vacuum and controls the display effect according to different pressures, temperatures and other environmental conditions under vacuum. Through vacuum packaging, the stability and durability of OLED displays can be effectively improved, and can be applied to large-area display devices, but this method has great challenges in terms of cost and production efficiency.

 

Finally, the manufacturing process of OLED display is a very complicated process, which requires a lot of technical and labor costs. However, OLED display technology has the characteristics of brighter color, faster response and lower energy consumption, which can meet people's high demand. The demand for quality visual experience.