March 1998

Document Type


Degree Name



Dept. of Applied Physics


Oregon Graduate Institute of Science & Technology


An optimization process was undertaken for Triple Supertwist Nematic (TSTN) subtractive color stacked liquid crystal displays. An optical model for an arbitrary liquid crystal cell has been developed. This model, which is based on the Jones matrix method for light propagation through non-depolarizing elements, has been modified to account for the high voltage behavior of Supertwist nematic devices. The model has been used to characterize and optimize liquid crystal cells for use in a subtractive color stack. The simulation has been designed with a graphical user interface to ease the optimization process. Subtractive color display systems have been studied and compared to additive color systems so as to obtain a benchmark for LCD display performance. A process for optimization of the LCD displays has been developed. Liquid crystal displays have been fabricated and characterized so that the modeled optimization could be compared with experimental measurements. The results of the comparison demonstrate that modeling using a simplified Jones calculus model is effective and efficient as compared to the two other approaches which require extensive numerical computation.





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