Liquid crystal display and device having a total retardance of (

Details Liquid crystal display and device having a total retardance of ( Liquid crystal display and device having a total retardance of (

1994-03-10

1996-07-30

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 73, 359 63, 359102, G02F 1137, G02F 11335, G02F 113

Patent

active

055417531

ABSTRACT:
A liquid crystal display comprises a nematic liquid crystal layer disposed between alignment layers. The alignment layers are formed on substrates which also carry display control electrodes connected to a drive circuit. Polarisers are provided on opposite sides of the substrates. The alignment layers are arranged such that the liquid crystal molecule pretilt angles at the surfaces of the alignment layers are parallel. The liquid crystal layer has a retardance equal to (M+1).lambda./2 at a first operating voltage and M.lambda./2 at a second operating voltage, where M is an integer greater than zero or less than minus one and .lambda. is a wavelength of visible light.

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Wu et al., "Mylar-Film Compensated .pi. and Parallel-Aligned Liquid Crystal Cells for Direct-View and Projection Displays, Appl. Phys., Lett." 64, (16), Apr. 1994, pp. 2047-2049.
Bos et al., "The pi-Cell: A Fast Liquid Crystal Optical Switching Device", Mol Crys. Liq Cryst., 1984, vol. 113, pp. 329-339 (no month).

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