With the rapid development of flat panel display (FPD) technology in the global economy, new research display information technologies have emerged in many countries, such as LCD modules, plasma displays (PDP), organic electroluminescent displays (OLED), and vacuum fluorescent displays. (VFD) and other technologies.boe screen manufacturer Among them, LCD has a series of important advantages such as low operating voltage, low power consumption, high resolution, good anti-interference performance, mature large-scale social production management technology, and low cost. Therefore, it can be applied in a wide range of applications.
Liquid crystal display technology is a non-self-luminous display technology. Its optical brightness depends on the backlight module, which determines the display effect of the product.lcd supplier As long as the backlight and other optical components remain in their original state and a few thin layers of brightness-enhancing film are added, the brightness of the LCD module can be increased to more than twice that of the original visible light film, occupying an important position in liquid crystal technology. Backlight module optical films are mainly used in LCD backlight products such as TVs, mobile phone LCD modules, monitors, MP4s, digital cameras, and automobiles.
Optical film is the core component of the backlight module and accounts for the highest cost of the backlight module. In the common optical film structure of backlight modules,oled supplier it usually consists of 1 reflective film + 1 lower diffusion film + 2 brightness enhancement films + 1 upper diffusion film. The optical film accounts for the highest cost in the backlight module. part. Taking a 42-inch TFT-LCD (LED) panel as an example, optical film accounts for approximately 37% of the cost of the backlight module and 17% of the total cost of the liquid crystal module. Among them, reflective film, diffusion film and brightness enhancement film account for 2%, 6% and 29% respectively. Brightness enhancement film is the most critical component.
Optical film: The key technology of roll material is coating technology, and the key difficulty in whitening optical film is to make the mold roller in the process of making optical film roll material. Precision coating technology is the key technology of the production process. The coating process involves raw material formula, Key technologies such as coating processes require a long period of exploration and experimentation to master the core technology.
Diffusion film: At present, the production technology of diffusion film is very mature, and high-end diffusion films are produced by precision coating.
Reflective film: The production technology is more diversified. The raw materials that can usually be used mainly include PET, PP, PC, etc. Currently, the mainstream research in the development of the medium and large size data display market uses PET, and in the small and medium size market, it is mainly Mitsubishi’s. PP material reflective film.
Brightness enhancement film: also known as prism film, light enhancement film, BEF (Brightness Enhancement Film), it consists of a three-layer structure. The light incident surface of the lowermost layer needs to provide a certain haze through back coating, and the middle layer is a transparent PET base material layer. The uppermost light-emitting surface is a microprism structure. The most critical technology for brightness enhancement film is the technology of engraving prismatic patterns on the roller. At present, the mainstream process for preparing brightness enhancement films is to use light-curing UV glue molding technology on the processed mold roller. The microprism structure requires the use of metal rollers with fine micron structures, and its processing requires the use of diamond precision machine tools, so the technical barriers are high.
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