Dual-function alignment layer for liquid crystal devices to improve degradation resistance to radiation
View Patent ↗A liquid crystal alignment layer both offers a surface to which the liquid crystal molecules align, and maintains conductive properties required for the liquid crystal molecules to be manipulated by an applied electrical field. Advantages of the alignment layer offer reduced device degradation and improved stability under conventional or high intensity radiation, and also simplify the liquid crystal display or device construction.
1. A dual-function alignment layer of a liquid crystal device, comprising:
a treated, polyimide-free, amorphous conductive material for direct interface between liquid crystal molecules and a substrate of the liquid crystal device, the conductive material providing both an electric field to the liquid crystal molecules and an alignment surface to which the liquid crystal molecules align.
2. The layer of claim 1 , wherein, the alignment surface is formed by rubbing the conductive material.
3. The layer of claim 1 , wherein the conductive material is an amorphous Indium Tin Oxide (ITO), a Transparent Conductive Oxide (TCO), transparent, semi-transparent, reflective, amorphous, semi-amorphous, conductive thin film, conductive thin film oxide, amorphous, room temperature or low temperature deposited Indium Tin Oxide (ITO).
4. The layer of claim 1 , wherein (a) the substrate is one or more of display grade glass, quartz, fused silica, borosilicate, aluminosilicate, alkali-barium silicate, alkaline earth boro-aluminosilicate, sodalime, silicon materials, single crystal (monocrystal), CdSe, and plastic.
5. The layer of claim 1 , further comprising one or more additional layers deposited onto a surface of the substrate, wherein the conductive material is deposited onto a surface of the one or more additional layers.
6. The layer of claim 1 , further comprising:
one or more additional layers deposited onto a second substrate of the liquid crystal device; and
a second conductive material deposited onto a surface of the one or more additional layers.
7. The layer of claim 1 , wherein the conductive material is patterned before being treated to form the alignment surface.
8. The layer of claim 1 , wherein the liquid crystal device is configured to operate in one of a transmissive configuration, a transflective configuration and a reflective configuration.
9. The layer of claim 1 , wherein the liquid crystal device is of one or more of parallel, wedged and non-conformal construction.
10. The layer of claim 1 , wherein the liquid crystal device operates in one or more of TN, STN, ECB, Pi, polymer dispersed, stressed polymer dispersed, Ferroelectric, vertical alignment, twisted vertical alignment, in-plane switching, and blue phase modes.