A Study on Alignment Process of Ion Beam Irradiation to Improve LCD Productivity in Electric Installation Application
- Authors
- Moon, H.-R.; Han, J.M.; Lee, H.-J.; Shon, J.-G.
- Issue Date
- Sep-2020
- Publisher
- SPRINGER SINGAPORE PTE LTD
- Keywords
- DuoPIGatron; Ion beam; Liquid crystal alignment; Polyimide thin film; Pretilt angles; Twisted nematic-liquid crystal display (TN-LCD)
- Citation
- Journal of Electrical Engineering and Technology, v.15, no.5, pp.2395 - 2400
- Journal Title
- Journal of Electrical Engineering and Technology
- Volume
- 15
- Number
- 5
- Start Page
- 2395
- End Page
- 2400
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/78213
- DOI
- 10.1007/s42835-020-00502-w
- ISSN
- 1975-0102
- Abstract
- In this study, we fabricated TN-LCD using DuoPIGatron ion beam with obliquely irradiated polyimide film and TN-LCD using conventional rubbing method, and compared the electro-optic characteristics. In the TN-LCD using the rubbing method, a pretilt angle of 0.05° was obtained, and it was confirmed that an excellent pretilt angle of 1.13° also occurred in the TN-LCD irradiated with an ion beam. In addition, voltage-transmittance characteristic, which is a characteristic for realizing gray scale, was measured using the TN-LCD manufactured as described above. And, the response time characteristic was measured as a basic feature to compose a screen without motion blur. As a result, both the TN-LCD using the rubbing method and the TN-LCD manufactured by ion beam irradiation showed good voltage-transmittance characteristics in the driving voltage range of 1.5–3.5 V. In particular, as a result of measuring the response time characteristics, the light-on time was measured at 5.11 ms and the light-off time was measured at 10.98 ms. This is a very good result at the level of TN-LCD without chiral dopant, which can be evaluated as comparable with the result of the production level. © 2020, The Korean Institute of Electrical Engineers.
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