Universal off-axis light transmission properties of the bright state in perfectly compensated liquid crystal devices

Abstract

Fabrication of electro-optic devices using liquid crystals with a single glass substrateWe studied the off-axis light transmission characteristics of the bright state of common liquid crystal device modes. The dark state of these device modes is optically compensated to have minimum light transmittance at all angles. Our research shows there is an unexpected universal shape of the off-axis light transmission value in its bright state, regardless of what liquid crystal mode is used. To understand this surprising fact, we consider simple dark and bright state models in terms of phase retardation and transmittance.

Optimization of the White State Director Configuration for Perfectly Compensated Pi-cell Devices

“…According to our results, their bright states have an interesting universality in terms of off-axis light transmission properties and are insensitive to the parameters if the bright state voltage or pretilt angle is not so big, and these features agree well with our first simple bright state model. 11) However, in bright state with a high tilt angle of director configuration, the off-axis light transmittance fluctuates as the incident light angle varies, and it makes the viewing angle properties of a Pi-cell worse. To explain these interesting facts, we create new dark and bright state models and analyze them in terms of effective birefringence, transmittance and angular distribution of directors.…”

Comparison and Analysis of Off-Axis Color Shift Properties of Compensated Liquid Crystal Devices

“…In our previous paper, 5) we explored the off-axis light transmission properties of the bright states of the common LCDs for monochromatic light and found an interesting universality that can describe the off-axis light transmission characteristics of the bright states regardless of the display modes. To understand these interesting facts, we proposed and analyzed simple dark and bright state models.…”

“…Figure 1 shows the simple dark and bright state models of a compensated liquid crystal device that we proposed in our previous paper. 5) In this study, we use the same model for the analysis of the luminance and color properties of the common LCDs. The dark states of the model and devices are optically compensated almost perfectly using passive-type compensators.…”