Investigation of liquid crystal aligning capabilities using a new photoalignment method on the photopolymer surfaces

In this work, we have investigated the liquid crystal (LC) aligning capabil ities and the electro-optical (EO) characteristics for the photo-aligned tw isted nematic (TIN) cell with linearly polarized UV exposure of normal dire ction on the PMCh (poly (4'-methacryloyloxy chalcone)) surfaces using a new photo-alignment method. Good thermal stabilities of synthesized PMCh were obtained by TGA (Thermogravimetric Analysis) measurement. The excellent vol tage transmittance (V-T) curve of the photo-aligned TN-LCD with UV exposure on the PMCh surface for I min using a new photodimerization method was obs erved. The voltage holding ratio (VHR) of the photo-aligned TN-LCD with pho todimerized on the PMCh surface using a new photodimerization method was hi gher than that of a conventional photo-dimerization method. Consequently, a good LC aligning capabilities using a new photo-alignment method can be ac hieved.