LCD tech. and other applications

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1 LCD tech. and other applications
액정물리화학 7장 LCD tech. and other applications

2 Materials alkylazobenzene

3 P-methoxybenzyliden-p-n-butylaniline (MBBA)
Materials P-methoxybenzyliden-p-n-butylaniline (MBBA)

4 Materials 낮은 전이 온도의 에스테르계 액정 -NO2와 –CN은 분극현상이 강함

5 MBBA 합성

6 Mixtures p-n-pentyl cyanobiphenyl(5CB)
p-n-octyloxy-p’-cyanobiphenyl(8OCB)

7 Dyes

8 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

9 Active matrix displays
삼단자 비선형 소자(화소 밝기 정밀 조절 가능 grey scale 가능) 이단자 비선형 소자

10 Lyotropic Liquid crystals
액정물리화학 8장 Lyotropic Liquid crystals

11 Lyotropic Liquid crystals
Hydrophilic Vs. hydrophobic

12 Lyotropic Liquid crystals

13 Lyotropic Liquid crystals
Kraft 온도 : 결정이 생성되지 않고 액정구조가 형성되는 온도

14 Amphiphilic compounds in water/oil mixture

15 Thermotropic-like LCs formed by micelles