Phase Retardation of Rubbed and Photoilluminated Polyimide Films and Its Relationship with Anchoring Strength
碩士 === 國立交通大學 === 電子物理系所 === 94 === There are relationship between liquid crystal alignment films and the parameters of liquid crystal display. Therefore the well know of liquid crystal alignment films support studies of the parameter of liquid crystal display. After rubbing or photo-irradiation, th...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2006
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| Online Access: | http://ndltd.ncl.edu.tw/handle/57496391594658286553 |
| Summary: | 碩士 === 國立交通大學 === 電子物理系所 === 94 === There are relationship between liquid crystal alignment films and the parameters of liquid crystal display. Therefore the well know of liquid crystal alignment films support studies of the parameter of liquid crystal display. After rubbing or photo-irradiation, the molecular of polyimide alignment films will be aligned and have optical anisotropy. Optical retardation of polyimide films are then induced. We change the conditions of alignment process and measure the induced optical retardation. A sensitive method for measuring optical retardation, the Senarmont Ellipsometry, is used to determine the optical retardation of our alignment films. Then we discuss the relationship between the optical retardation of alignment films and anchoring strength to the liquid crystal. Our results show that only the optical anisotropy of surface molecule in polyimide films effects the anchoring strength of liquid crystal. In addition, we use the Senarmont Ellipsometry to measure the optical retardation of liquid crystal cell.
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