How many polarizers are present in a lcd device

A backlight placed behind a Transflective polarizer will allow some light to pass through, but the display will not be as bright as the same backlight placed behind a Transmissive polarizer. If you need your backlight to be brighter and your display to operate in both strong and poor ambient light, there are additional methods to increase the brightness of the LED.

Contact our US based technical support for ideas. In your choice of LCD Polarizers: there is no difference in cost or lead time between a Reflective, Transflective or Transmissive polarizer. Choose the polarizer based on the type of lighting conditions your display will operate in. You can call Toggle menu Login or Sign Up 0.

An LCD polarizer is a filter that controls light waves. Regardless, all LCDs have a lighting system. The purpose of a polarizer is to create visible images. LCDs typically have two polarizers. Polarizers are typically made of a clear crystalline material. Non polarized light is filtered as polarized light after passing through the gap of iodine molecules or dye molecules in directional arrangement At present, the polarizers on the market can be classified according to the different dichroic molecules which play the role of polarizing on PVA film, mainly including metal polarizing film, iodine polarizing film, dye polarizing film and polyethylene polarizing film.

Because of the high transmittance and degree of polarization, iodine based polarizing film is widely used at present. Extending PVA film is the core step in the production of polarizer.

According to the different methods of extending PVA film, the production of polarizer can be divided into two categories, i. Among them, the dry method refers to the PVA membrane extension in a certain temperature of steam environment, while the wet method refers to the PVA membrane extension in a certain proportion of liquid. The PVA film obtained by wet process has good uniformity and durability, which is the production mode adopted by most polarizer manufacturers at present.

In the finished polarizer, the area of polarizer is equal to the area of PVA film in theory. In the process of polarizer manufacturing, PVA membrane pretreatment must be extended, so the actual production of polarizer consumes about 0. At present, China's PVA membrane market is mainly monopolized by Japan cola, and cola itself is one of the main suppliers of high-end PVA resin raw materials in the world.

Colly's monopoly in the field of PVA optical film also benefits from its integrated production system, which can realize the integrated production from high-end PVA resin, to the production of PVA film for polarizer, to the surface treatment of PVA film. It has excellent light uniformity, transparency, acid and alkali resistance and UV resistance. It is required to control all kinds of parameters in the production process so that the final product can achieve high flatness, excellent mechanical properties and optical properties.

The whole production process has a very high demand for process control ability. The TAC films used in polarizer production can be roughly divided into two categories, i.

Among them, the light plate TAC film refers to the TAC base film without any surface treatment or additional film layer, and the TAC functional film refers to the TAC film with different functions after being treated by coating, sputtering and other surface treatment methods. Login or Sign Up 0. Our staff understands the necessity of quick, knowledgeable engineering support.

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