Abstract
We fabricated a polymer dispersed liquid crystal (PDLC) cell using LC with negative dielectric anisotropy and UV curable monomer exhibiting transparent state initially (called normally transparent (NT)) and studied the electro-optic characteristics. The NT PDLC cell made with the ratio of LC : monomer = 70/30 wt%, curing temperature of 20°C and strong UV intensity of 198 mW/cm 2 had high contrast ratio and showed good electro-optic characteristics. In this condition, LC is aligned vertically on the substrate due to the vertical alignment layer and the polymer made with the UV exposure does not influence the alignment of the LC much. Therefore, the transmittance at the zero voltage is very high and the scattering state of the cell is good after applying the voltage because LC with negative dielectric anisotropy tries to align perpendicular to the field. And also, the NT PDLC cell showed better viewing angle characteristics than that in the normally scattering (NS) PDLC.
| Original language | English |
|---|---|
| Pages (from-to) | 298-304 |
| Number of pages | 7 |
| Journal | Polymer (Korea) |
| Volume | 28 |
| Issue number | 4 |
| State | Published - 2004.07 |
Keywords
- Normally scattering polymer dispersed liquid crystal
- Normally transparent
Quacquarelli Symonds(QS) Subject Topics
- Materials Science
- Engineering - Chemical
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