Abstract
Recently, we clarified that a single-polarizer reflective DTN-LCD with a retardation film exhibits an achromatic image of high luminous reflectance and high contrast ratio, even if the on-voltage of TFT-LCD is reduced to 2V, the power consumption can thus be decreased to about 1/6 to 1/7 that of a conventional reflective TFT-LCD of 5V in the on-state, while maintaining high-quality image. In this paper, we numerically analyzed the relationship between the electro-optical properties and the twist angle and the dispersion of Δn, the driving voltage, the error from the designed value of the cell gap to obtain the optimum twist angle and dispersion of Δn, the lower limit of the on-voltage, and the tolerance of the cell gap. We found that it is possible to produce the reflective TFT-LCD of 2V with an achromatic image of high luminous reflectance and high contrast ratio by present technology.
