나노 미립자를 이용하여 자기 배향된 수직 배향 액정표시 소자에 대한 연구 = Research on Alignment Layer Free Vertical Alignment Mode Associated with Nano particles

다국어 초록 (Multilingual Abstract)

The conventional vertical alignment (VA) device shows an excellent contrast ratio at normal direction. However, as the size of liquid crystal display (LCD) becomes larger, uniform coating of a polyimide (PI) alignment layer uniformly becomes very difficult and also PI layer requires high curing temperature, which consumes power consumption. In order to replace conventional PI layer, in this paper we have studied nano particles. The nano particles were organic-inorganic synthetic polymer phenethyl-polyoligosilsesquioxane (phenethyl-POSS). This nano particle was mixed with liquid crystal (LC) and reactive mesogen (RM) in the LCD cell. The nano particle diffused into both surfaces inducing vertical alignment of LC and then UV was exposed to polymerize RM to fix the LC director. The scanning electron microscope (SEM) images confirmed polymerized RM on POSS surface. Consequently, the first VA cell with fishbone electrode structure on bottom substrate and plane electrode on top substrate with POSS and RM showed wide-viewing-angle and fast response time.

목차 (Table of Contents)

• 그림목록 ⅲ
• Abstract v
• Ⅰ.서론 1
• 1.액정의배향 6
• 1.1액정배향 6
• 1.2액정배향방법 7
• 2.광시야각원리및광시야각수직배향소자 13
• 2.1광시야각의원리 13
• 2.2 수직배향소자의광시야각기술 20
• 2.3 수직배향소자의투과율특성 23
• 2.4 수직배향소자의응답속도특성 24
• 3.연구의배경및목적 27
• Ⅱ. 실험 28
• 1.나노 입자를 이용한 수직배향 소자의 특성 연구 28
• 1.1 나노입자를 이용한 액정 배향 연구 28
• 1.2 나노입자의 표면확산속도 연구 37
• 2.나노 입자를 이용한 수직배향 소자의 액정 방향자 안정화 연구 43
• 2.1 광경화성 단분자를 이용한 액정 방향자 안정화 연구 43
• 2.2 PS-VA PVA 단위 셀에서의 액정 방향자 안정화 연구 45
• 2.3 PS-VA fishbone 단위 셀에서의 액정 방향자 안정화 연구 47
• Ⅲ. 결 론 57
• Ⅳ. 참고문헌 58