LCD tech. and other applications 액정물리화학 7장 LCD tech. and other applications
Materials alkylazobenzene
P-methoxybenzyliden-p-n-butylaniline (MBBA) Materials P-methoxybenzyliden-p-n-butylaniline (MBBA)
Materials 낮은 전이 온도의 에스테르계 액정 -NO2와 –CN은 분극현상이 강함
MBBA 합성
Mixtures p-n-pentyl cyanobiphenyl(5CB) p-n-octyloxy-p’-cyanobiphenyl(8OCB)
Dyes
기타 재료 - Galss : (problem) Sodium, alkai ion form a charge layer 기타 재료 # Substrate - Galss : (problem) Sodium, alkai ion form a charge layer (Avoid ) Borosilicate glass(few alkali ion), coat a layer of SiO2 - Plastic : overcome birefringent and react chemically with LC(low-cost plastic) - ITO : 10~50nm, transmit over 80% of light, low electrical resistance # Alignment agent - Homogeneous : Pi (popular alignment agent), PVA (susceptible to moisture), Silanes (poor reliability), evaporate silicon oxide - Homeotropic : use a Amphiphilc material # Spacer(thermoplastics and thermosetting ) : Glass fibers or beads # Polarizer : made from stretched PVA contains a dye instead of iodine that are placed between layers of Cellulose acetate
Active matrix displays 삼단자 비선형 소자(화소 밝기 정밀 조절 가능 grey scale 가능) 이단자 비선형 소자
Lyotropic Liquid crystals 액정물리화학 8장 Lyotropic Liquid crystals
Lyotropic Liquid crystals Hydrophilic Vs. hydrophobic
Lyotropic Liquid crystals
Lyotropic Liquid crystals Kraft 온도 : 결정이 생성되지 않고 액정구조가 형성되는 온도
Amphiphilic compounds in water/oil mixture
Thermotropic-like LCs formed by micelles