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Response time, threshold voltage and viewing angle characteristics of the liquid crystal display (LCD) depend upon the pretilt angle of liquid crystals. Also the pretilt angle of the LC can be controlled by changing the materialistic properties like s...
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UV-Curable Liquid Crystal Monomer를 이용한 액정의 선경사각 조절에 대한 연구 = Study on Pretilt Angle Control of Liquid Crystal using UV-Curable Liquid Crystal Monomer
한글로보기https://www.riss.kr/link?id=T11617228
- 저자
-
발행사항
전주 : 전북대학교 대학원, 2009
- 학위논문사항
-
발행연도
2009
-
작성언어
한국어
- 주제어
-
발행국(도시)
전북특별자치도
-
기타서명
Study on Pretilt Angle Control of Liquid Crystal using UV-Curable Liquid Crystal Monomer
-
형태사항
iv, 55p : 삽도 ; 26cm
-
일반주기명
전북대학교 논문은 저작권에 의해 보호받습니다.
지도교수:이승희
참고문헌 : p. 45-48 -
소장기관
- 전북대학교 중앙도서관
- 전북대학교 중앙도서관
-
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부가정보
다국어 초록 (Multilingual Abstract)
Response time, threshold voltage and viewing angle characteristics of the liquid crystal display (LCD) depend upon the pretilt angle of liquid crystals. Also the pretilt angle of the LC can be controlled by changing the materialistic properties like splay and bend elastic constants of liquid crystals. To control the pretilt angle, various methods such as mixed alignment layer, nano-structured surface, and SiO2 evaporation are reported, but these techniques are not amenable to mass production and to large display panels.
In this paper, we have studied formation of new pretilt angle by polymerization of UV-curable reactive mesogen (RM) by applying vertical field. First, the gray scale inversion of commercialized twisted nematic (TN) mode was improved by employing the dual domain through formations of different pretilt angle in each domain. Second, we have studied the optically compensated splay mode driven by fringe electric field (FFS-OCS mode), in which the splay deformation of LC molecules is formed through the polymerization of UV curable RM monomer at the surfaces. The director of the proposed FFS-OCS mode rotates in plane and hence the device shows wide viewing angle. Also the normally black mode in the device can be realized even without compensation films.
In this paper, we have studied formation of new pretilt angle by polymerization of UV-curable reactive mesogen (RM) by applying vertical field. First, the gray scale inversion of commercialized twisted nematic (TN) mode was improved by employing the dual domain through formations of different pretilt angle in each domain. Second, we have studied the optically compensated splay mode driven by fringe electric field (FFS-OCS mode), in which the splay deformation of LC molecules is formed through the polymerization of UV curable RM monomer at the surfaces. The director of the proposed FFS-OCS mode rotates in plane and hence the device shows wide viewing angle. Also the normally black mode in the device can be realized even without compensation films.
Response time, threshold voltage and viewing angle characteristics of the liquid crystal display (LCD) depend upon the pretilt angle of liquid crystals. Also the pretilt angle of the LC can be controlled by changing the materialistic properties like splay and bend elastic constants of liquid crystals. To control the pretilt angle, various methods such as mixed alignment layer, nano-structured surface, and SiO2 evaporation are reported, but these techniques are not amenable to mass production and to large display panels.
In this paper, we have studied formation of new pretilt angle by polymerization of UV-curable reactive mesogen (RM) by applying vertical field. First, the gray scale inversion of commercialized twisted nematic (TN) mode was improved by employing the dual domain through formations of different pretilt angle in each domain. Second, we have studied the optically compensated splay mode driven by fringe electric field (FFS-OCS mode), in which the splay deformation of LC molecules is formed through the polymerization of UV curable RM monomer at the surfaces. The director of the proposed FFS-OCS mode rotates in plane and hence the device shows wide viewing angle. Also the normally black mode in the device can be realized even without compensation films.
목차 (Table of Contents)
- 그림 목차 = ⅱ
- Abstract = ⅳ
- 1. 서론 = 1
- 2. UV 반응성 액정 단분자 = 6
- 2.1. UV 반응성 액정 단분자 = 6
- 그림 목차 = ⅱ
- Abstract = ⅳ
- 1. 서론 = 1
- 2. UV 반응성 액정 단분자 = 6
- 2.1. UV 반응성 액정 단분자 = 6
- 3. 수평 배향 셀에서 액정의 선경사각 조절 = 11
- 3.1. ECB mode = 11
- 3.2. Dual domain TN mode = 17
- 4. 수직 배향 셀에서 액정의 선경사각 조절 = 25
- 4.1. OCS (Optically Compensated Splay) mode = 25
- 4.2. FFS-OCS mode = 36
- 5. 결론 = 43
- 6. 참고문헌 = 45
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