Stamping‐assisted fabrication technique of the bidirectional alignment layer for wide‐viewing twisted‐nematic liquid crystal displays

Kyungmo Koo School of Electrical Engineering, Seoul National University, #032, Kwanak, P.O. Box 34, Seoul, 151–600, Korea

Jun‐Hee Na School of Electrical Engineering, Seoul National University, #032, Kwanak, P.O. Box 34, Seoul, 151–600, Korea

Yeun‐Tae Kim School of Electrical Engineering, Seoul National University, #032, Kwanak, P.O. Box 34, Seoul, 151–600, Korea

Hongmei Li School of Electrical Engineering, Seoul National University, #032, Kwanak, P.O. Box 34, Seoul, 151–600, Korea

Sin‐Doo Lee School of Electrical Engineering, Seoul National University, #032, Kwanak, P.O. Box 34, Seoul, 151–600, Korea Phone: +82–2–880–1772 Fax: +82–2–880–1772 E-mail: [email protected]

Abstract

A stamping‐assisted rubbing technique for generating bidirectional alignment in the fabrication of wide‐viewing twistednematic (TN) liquid crystal displays (LCDs) was developed. A patterned layer of a fluorinated acrylate polymer was transferred onto the first rubbed alignment layer prepared on a substrate by stamping. The fluorinated acrylate polymer provides a protective layer that covers the first alignment layer during the second rubbing process to facilitate the bidirectional alignment of the LC molecules. The LC cell in the twisted geometry with two bidirectional‐alignment layers showed stable electro‐optic properties and wide‐viewing characteristics. The stamping‐assisted rubbing technique serves as a mask‐free alignment method of producing multidomains for wide‐viewing LCDs.

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Sutdent Member, KIDS

Member, KIDS

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Stamping‐assisted fabrication technique of the bidirectional alignment layer for wide‐viewing twisted‐nematic liquid crystal displays

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Stamping‐assisted fabrication technique of the bidirectional alignment layer for wide‐viewing twisted‐nematic liquid crystal displays

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