Defect free polymer-stabilized (PS-)V-mode FLCDs and intrinsic half (H-)V-mode FLCDs have been fabricated; they exhibit high contrast ratio over 700:1 and high reliability for a temperature cycling test by using specially developed polyimide alignment materials, RN-1411 series, from Nissan Chem. Ind., and also by adopting special alignment technique such as appropriate rubbing technique, photoalignment, and ion beam irradiation techniques and also particularly developed polymer-stabilization technique. These FLCDs are shown to be useful for implementing a field sequential type full color (FS-FC) LCDs due to their fast response with the response time of τ = 100μs ~ 500μs that is 10 to 100 times faster that those of LCDs using NLCs. We have developed several prototype models of FS-FC LCDs having VGA specifications that exhibit good performance for displaying fast moving video rate images with wide color gamut.
The effect of the photoalignment on the electrooptic characteristics of polymer stabilized ferroelectric liquid crystal displays (FLCDs) exhibiting V-shaped switching and those of FLCDs exhibiting half-V switching are reported and discussed. Photoalignment technique and hybrid alignment, which is done by combining photoalignment and rubbing, are shown to be useful for fabricating zig-zag defect-free FLCDs and improving the electrooptic characteristics of FLCDs-SSFLCDs, V-F-LCDs, and H-V-FLCDs- especially in the reduction of operation voltage.
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