The Hong Kong University of Science and Technology

Man Chun Tseng

Hoi Sing Kwok

Abhishek Kumar Srivastava

Yeuk Lung Jacob Ho

Cuiling Meng

Vladimir Grigorievich Chigrinov

Yuet Wing Li

Yue Shi

Chenxiang Zhao

A composite photoalignment layer for aligning liquid crystal molecules includes: a monomeric material; a photoinitiator or a thermal initiator; and an azo dye material. A method for preparing a composite photoalignment layer for aligning liquid crystal molecules includes: mixing, in solution form, a monomeric material, a photoinitiator or a thermal initiator, and an azo dye material; coating the mixed solution onto a substrate to form a thin film; exposing the thin film to polarized light; and, with a thermal initiator, heating the thin film to polymerize the monomeric material and form a solid thin film.

Composite photoalignment layer

A method of producing spatially varying pretilt angles across a liquid crystal cell coats a substrate with a polyimide alignment layer and a layer of photoalignment material on top of the polyimide layer. An applied beam with variable light dosage spatial or temporal profiles is then used to achieve a corresponding pretilt angle distribution.

Method of producing spatially variable pretilt angles across a liquid crystal cell

Growing community of inventors

Hong Kong, China

Man Chun Tseng