초록 ▼

A ferroelectric liquid crystal display (FLCD), which comprises a cell including a layer of chiral smetic ferroelectric liquid crystal material contained between two substrates and at least one alignment layer for determining the surface alignment of the molecules in the liquid crystal material, is m

A ferroelectric liquid crystal display (FLCD), which comprises a cell including a layer of chiral smetic ferroelectric liquid crystal material contained between two substrates and at least one alignment layer for determining the surface alignment of the molecules in the liquid crystal material, is manufactured as follows. After selection of a suitable material for the alignment layer, the cell is filled by introducing liquid crystal material between the substrates to which the alignment layer is applied. After filling of the cell, a heat treatment is applied to the cell by raising the cell to an elevated temperature and maintaining the cell at that temperature for a predetermined period of time. The temperature and the period of time of this heat treatment are selected to cause the surface alignment properties of the alignment layer to be changed by the heat treatment in such a manner as to promote adoption of the C2 state by the liquid crystal material on subsequent cooling to the device operating temperature.

대표청구항 ▼

[ What is claimed is:] [1.] A method of manufacturing a liquid crystal device which comprises a cell including a layer of liquid crystal material contained between two substrates each of which is provided with an alignment layer for determining the surface alignment of the molecules in the liquid cr

[ What is claimed is:] [1.] A method of manufacturing a liquid crystal device which comprises a cell including a layer of liquid crystal material contained between two substrates each of which is provided with an alignment layer for determining the surface alignment of the molecules in the liquid crystal material, the method including the steps of:(a) applying a first alignment layer to a first substrate;(b) applying a second alignment layer to a second substrate;(c) heat treating the first and second substrates to cure the first and second alignment layers;(d) rubbing the first and second alignment layers to provide the required surface alignment;(e) connecting the first and second substrates together so that the first and second alignment layers face one another with a gap therebetween; and(f) filling the cell by introducing liquid crystal material between the first and second substrates;wherein, in step (c), different heat treatments having different effects on the surface alignment properties of the first and second alignment layers are applied to the first and second substrates, and the first and second alignment layers are made of different materials and/or are differently processed in order to compensate for the effects of the different heat treatments so that the first and second alignment layers have similar surface alignment properties in the manufactured device.