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Superior electro-optical performance in vertically aligned liquid crystal devices based on aluminum oxide films |
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| Authors: | Hong-Gyu Park Hyo Young Mun Hae-Chang Jeong Byeong-Yun Oh Jeong-Min Han |
| Affiliation: | 1. School of Electrical, Electronic &2. Control Engineering, Changwon National University, Changwon-si, Gyeonsangnam-do, Republic of Korea;3. Information Display Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seodaemun-gu, Seoul, Republic of Korea;4. ZeSHTech Co., Ltd, Business Incubator, Gwangju Institute of Science and Technology, Buk-gu, Gwangju, Republic of Korea;5. Department of Electronic, Seoil University, Jungnang-gu, Seoul, Republic of Korea |
| Abstract: | We achieved vertically aligned (VA) liquid crystals (LCs) on aluminum oxide (Al2O3) films deposited via e-beam evaporation using a rubbing treatment. Uniform and vertical LC alignment was achieved and high thermal stability was obtained using these substrates. By analyzing measurements from optical retardations, we confirm that the LC orientation is adjustable using rubbing treatment. The superior electro-optical characteristics of the VA cells based on Al2O3 films are measured and compared with those based on polyimide layers, indicating that this approach will allow the fabrication of high-performance, advanced LC displays using a conventional rubbing process. |
| Keywords: | Al2O3 electro-optical characteristics liquid crystal alignment rubbing process vertically aligned cell |