Polymer-Layer-Free Alignment for Fast Switching Nematic Liquid Crystals by Multifunctional Nanostructured
- Polymer-Layer-Free Alignment for Fast Switching Nematic Liquid Crystals by Multifunctional Nanostructured
- 정우빈; 정현수; 전환진; 김윤호; 황정연; 김재훈; 정희태
- Liquid Crystal; Alignment; Nano pattern; Pre-tilt angle; Response time
- Issue Date
- Advanced materials
- VOL 27, NO 42, 6760-6766
- Current liquid-crystal-display (LCD) technology relies on the
use of an alignment layer [ 1 ] along with polymer rubbing and
photoalignment [ 2–4 ] to align liquid-crystal (LC) molecules.
However, future designs of high performance, 3D, low energy
consuming displays will not rely on alignment layers to bring
about uniform alignment and fast response of LC molecules.
The major reason for the need of a new design strategy is
that alignment layers in these displays cause transmittance
degradation, refractive index mismatching, undesired capacitance,
and low thermal and physical stability. [ 5–8 ] As a result,
techniques must be uncovered to rapidly align LC molecules
on electrode substrates, without any defects over large areas,
without utilizing polymer layers. [ 9,10 ] Although the potential
exists that asymmetric nonnematic LCs can be used for this
purpose, [ 11,12 ] it is diffi cult to design the proper LC molecules
because of their symmetric breaking characteristics, the narrow
temperature ranges over which they can be used, and defects
that are typically generated.
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