The response speed of in-plane switching mode liquid crystal displays with three initial director configurations - homogeneous, twisted nematic and 180° super twisted nematic - was investigated via simulations. These simulations studied the relationship between the change in the optical axis and the optical transmission in the three configurations, allowing us to calculate the optical response times. The time-dependent change in the director was calculated using the Erickson-Leslie equations and these two results combined. These results predict that the response time during both the rise and decay periods of a super twist cell is about four times faster than the other two configurations.
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