A well-known problem of TN TFTs is the reduced viewing angle for one direction. For this direction the picture will be inverted.
While a typical solution is the usage of expensive MVA or IPS cells instead of TN cells, which provide better viewing angles for all directions, there is also a more cost-efficient technology.
A special polarizer - o-film - can be used to increase the viewing angle.
The picture shows one module with o-film (left), the other without. While the left one shows normal colors, the right one is difficult to read.
However, also the disadvantages should be mentioned. The brightness and contrast will be decreased by o-film and in fact o-film is more expensive than normal polarizer.
As a conclusion it can be said that o-film can be a good solution to enhance exhisting modules or provide low-budget wide viewing angle solutions.
O-film is suitable for many TN cells. Contact us for details.