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The authors found that the coloration in appearance as a noticeable defect of super twisted nematic LCD (STN-LCD) can be cancelled out and monochromatic display can be realized by adding an optical compensator to the STN-LCD. This NTN mode display shows the steepness of threshold characteristic and the response times equivalent to those in STN, but its contrast ratio, viewing angle, and multiplex driving capability are far better than those in STN. A liquid crystal cell is used as a compensator. Monochromatic display can be done when both display cell and compensator cell satisfy the following three conditions. (1) Product values n