Alignment control of liquid crystals in a 1.0-μm-pitch spatial light modulator by lattice-shaped dielectric wall structure

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6 Citations (Scopus)

Abstract

We achieved uniform liquid crystal (LC) alignment in lattice-shaped dielectric walls 1 μm in pitch; this is a prerequisite when driving the individual pixels of spatial light modulators, facilitating the development of practical electronic holographic displays with a wide field of view. In lattice-shaped dielectric walls, LC alignment becomes unstable, particularly on the bottom and the walls; the LC directors tend to align parallel to the walls. To overcome this problem, we created lattice-shaped walls featuring partition plates that allow uniform LC alignment. When the plates confine LCs to small regions exhibiting spatial anisotropy, the LC elastic effect and wall anchoring forces align the LC directors parallel to the long anisotropic axis. We found that pixels 0.5 μm × 1.0 μm in pitch formed if the partition plates were sufficiently thick to allow shielding of electric field leakage.

Original languageEnglish
Pages (from-to)251-258
Number of pages8
JournalJournal of the Society for Information Display
Volume27
Issue number4
DOIs
Publication statusPublished - 2019 Apr

Keywords

  • dielectric shield wall
  • fringe electric field
  • holographic display
  • liquid crystal-on-silicon
  • spatial light modulator

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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