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Comparison of optical compensations based on discotic liquid crystals with linear and non-linear orientation for wide viewing angle twisted nematic liquid crystal displays  

Hwang, Seong-Han (Research Center for Advanced Materials Development, BK-21 Polymer BIN Fusion Research Team, Chonbuk National University)
Lim, Young-Jin (Research Center for Advanced Materials Development, BK-21 Polymer BIN Fusion Research Team, Chonbuk National University)
Lee, Myong-Hoon (Research Center for Advanced Materials Development, BK-21 Polymer BIN Fusion Research Team, Chonbuk National University)
Lee, Seung-Hee (Research Center for Advanced Materials Development, BK-21 Polymer BIN Fusion Research Team, Chonbuk National University)
Lee, Gi-Dong (Department of Electronics Engineering, Dong-A University)
Kang, Hoon (LG. Philips LCD)
Kim, Kyeong-Jin (LG. Philips LCD)
Choi, Hyun-Chul (LG. Philips LCD)
Publication Information
Current Applied Physics / v.7, no.6, 2007 , pp. 690-696 More about this Journal
Abstract
Optical compensation lm using discotic liquid crystals has been commercialized to suppress light leakage of twisted nematic (TN)liquid crystal (LC) cells in the dark state when the viewing directions are o-axes. In the conventional lm, the tilt angle variation ofthe discotic LC layers is linear, whereas that of the rod-like LC layers in the TN cell is non-linear with twist alignment. We investigatedin a tilt angle or twist and non-twist orientation on TN-LC cells. The results showed that the optical compensation with non-linear ori-entation exhibited an improved performance in suppressing light leakage in the dark state.
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