The negative birefringence optical compensation films can be used to significantly improve the viewing angles of single- domain and multi-domain LCDs. This type of optical compensation films are being commercialized and are available from a few major polarizer and optical film manufacturers. Also, the negative birefringence compensation films have been used in several Asia and US TFT/LCD manufacturers and display system developers to improve the TN/LCD viewing angles. Most recently, there are three TFT/LCD panes with improved large viewing cone being commercialized with the use of the negative birefringence optical compensation films. These panels include: (1) US TFT/LCD vendors compensated single domain TFT/TN panels; (2) Sharp compensated 2-domain Super-V TFT/TN panels; and (3) Fujitsu super-wide compensated 4-domain vertical aligned TFT/VA panels. We review the status and major applications of the applications of negative birefringence compensation to TN, STN, vertically aligned LCDs, and parallel aligned LCDs.
Hiap L. Ong, Hiap L. Ong,
"Improvement of LCD viewing angles by negative-birefringence compensation films", Proc. SPIE 3421, Display Technologies II, (17 June 1998); doi: 10.1117/12.311069; https://doi.org/10.1117/12.311069