PHOTO-ALIGNMENT LAYERS WITH STRONG UV-DICHROISM

摘要

The invention relates to photo-alignment layers for planar alignment of liquid crystals. Photo-alignment layers according to the invention exhibit a characteristic wavelength dependency of the dichroism in the uv wavelength range. The invention further relates to methods for providing such photo-alignment layers as well as liquid crystal devices containing them.

主权项

1. A photo-alignment layer for planar alignment of liquid crystals, which is optically anisotropic and has a negative dichroism with ΔA<−0.3 per micrometer thickness in at least one wavelength range above 230 nm and a positive dichroism with ΔA>0.07 per micrometer thickness in at least one wavelength range between 190 nm and 230 nm.