What are the types and functions of polarizing films for TFT LCD screens
The composition structure and function of polarizing film for TFT LCD liquid crystal display screen. The types of polarizing film are: ordinary viewing angle polarizing film in TN display mode, ultra wide viewing angle polarizing film in TN display mode,
The composition structure and function of polarizing film for TFT LCD liquid crystal display screen. The types of polarizing film are: ordinary viewing angle polarizing film in TN display mode, ultra wide viewing angle polarizing film in TN display mode, and IPS mode full viewing angle polarizing film.
Polarizing film is the best partner for TFT LCD liquid crystal display screens. When light is reflected from the surface of an object, partial polarization can cause glare. Glare can increase brightness while reducing color saturation, making object contours unclear and causing eye fatigue and discomfort. The function of polarizing film is to eliminate such glare effects. The composition structure of polarizing film is: the middle PVA (polyvinyl alcohol), two layers of TAC (cellulose triacetate), PSA film (pressure-sensitive adhesive), Release film (release film) and Protective film (protective film). As shown in the figure below.
The polarizing film of TFT LCD screen mainly includes the following categories:
1. Ordinary viewing angle polarizing film in TN display mode: thickness of 0.13mm, 0.15mm, 0.17mm, 0.22mm, all directional products are available for selection, with angles of 45 ° and 135 ° depending on the viewing angle of the glass. Materials include ordinary bright light, scratch resistant bright light, AG25 conventional frosted, AG40 fine sand, AG13 fine sand, anti reflection AR, and film with APF.
2. Ultra wide viewing angle polarizer in TN display mode: with thicknesses of 0.17mm, 0.22mm, and 0.26mm, all directional products are available for selection. The angles are 45 ° and 135 ° depending on the viewing angle of the glass. The materials include ordinary bright light, scratch resistant bright light, AG25 conventional frosted, AG40 fine sand, AG13 fine sand, anti reflective AR, and film with APF.
3. IPS mode full view polarizer: with thicknesses of 0.11mm, 0.13mm, 0.15mm, 0.17mm, all directional products are available for selection, and the angles vary depending on the glass, including 7 ° \ 83 °, 6 ° \ 84 °, 0 ° \ 190 °, 173 ° \ 97 °, etc; The materials include regular glossy, scratch resistant glossy, AG25 regular frosted, AG40 fine sand, AG13 fine sand, anti reflective AR, film with APF, etc.
We have some high brightness TFT LCD screens that customers need to see in outdoor sunlight. The problem is that due to the harsh sunlight outdoors, there will be severe glare when viewed directly with the naked eye. If you wear sunglasses to view the content on the display screen, the sunglasses themselves are a type of glass with polarizing film, which will interfere with the polarizing film of the LCD, and you will see that the screen is pitch black or the color is distorted, as shown in the left picture.
And we have a corresponding solution for this situation, which is to use a special polarizing film. The inner protective film on the upper layer has circular polarization characteristics, which can convert the polarized light emitted by the LCD into a circular polarization state, making it have the ability to see under sunglasses, that is, the Sunglass Free function, as shown in the right figure.
Special Polarized Film - Visible Function Under Sunglasses
