Transcript Liquid Crystal Devices - UB Electrical Engineering

Liquid Crystal Devices
Agenda
• Molecular Properties
• Thermal, Electric/Magnetic, Optic Effects
• Applications
• References
What are Liquid Crystals?
• Materials exhibiting properties of Liquids
and Crystals
• Anisotropic
Solid
Liquid Crystal
Liquid
n

Director
S  average[(3cos   1) / 2]
2
Smectic
Pitch
Chiral Nematic
External Effects on LCs
• Thermal
• Stress
• Electric/Magnetic
- Freedericksz Transition
• Optical
Change in Plane of Polarization
Birefringence of LCs
Applications of LCs
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Displays and Projectors
Thermometers
Light Modulators and Switches
Material Testing
Chemical Probes
LC Lens
Rewritable Optical Data Storage
Major Players in LCs
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Sony
Epson
Panasonic
LG Philips LCD
Sharp
Samsung
Rolic
Merck
References
• www.ilcsoc.org The International Liquid Crystal
Society
• plc.cwru.edu Polymers and Liquid Crystals Case
Western Reserve University
• http://www.sciencemag.org/ Science Magazine
Home
• www.lci.kent.edu Liquid Crystal Institute Kent
State University
• www.eng.ox.ac.uk/lc Liquid Crystal Technology
Group Oxford University
Thank You