Electronic holographic displays precisely reconstruct the wavefront of object light and have attracted considerable attention for Virtual Reality (VR) and Augmented Reality (AR) applications. To achieve a high-quality holographic display with a wide field of view, it is necessary to reduce the pixel pitch of a spatial light modulator (SLM) to about 1 μm. We have achieved a precise control of Liquid Crystal (LC) alignment in 1 μm pitch pixels by exploiting the anisotropy of pixel space due to the lattice-shaped dielectric walls. In this paper, we have investigated the effect of LC-SLM structure on the image quality of electric holographic displays. As a result, we clarified that the image quality of phase-modulation type holographic displays does not degrade even when the number of gray levels is four or more and established a simple pixel structure that allows independent control of 1 μm pitch pixels and high image quality.
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