Liquid crystal display device with display and compensation cells separated by distance larger than depth of focus of optical enlarger

A display apparatus for enlarging an image formed by a liquid crystal device and for displaying the enlarged image, comprising:

• a light source for emitting a light;
• a display liquid crystal cell arranged in an optical path of light emitted from said light source, said display liquid crystal cell including:
• first and second substrates arranged to oppose each other through a predetermined gap;
• electrodes respectively formed on opposing surfaces of said first and second substrates, said electrodes being substantially perpendicular to each other and opposing each other;
• alignment films subjected to alignment processing formed to cover said electrodes so as to align liquid crystal molecules in a predetermined direction;
• and
• a first liquid crystal material sealed between said first and second substrates by a seal member, and being twisted within a range of 180.degree. to 270.degree. in a first twist direction, said first liquid crystal material having a refractive index anisotropy .DELTA.n.sub.1 of said first liquid crystal material which is not less than 0.18 and a product .DELTA.n.sub.1 .multidot.d.sub.1 of the refractive index anisotropy .DELTA.n.sub.1 and a layer thickness d.sub.1 of said material which is not less than 0.7 .mu.m, and wherein a signal corresponding to image data on a desired motion image is supplied to a region between said opposing electrodes;
• a composition liquid crystal cell arranged in the optical path of the light emitted from said light source, for optically compensating for the light transmitted through said display liquid crystal cell, said compensation liquid crystal cell including:
• third and fourth substrates arranged to oppose each other through a predetermined gap;
• alignment films for aligning liquid crystal molecules in a predetermined direction respectively formed on opposing surfaces of said third and fourth substrates, and wherein one of said alignment films which is adjacent to one of said first and second substrates is subjected to alignment processing in a direction substantially perpendicular to the alignment processing direction of said alignment film of said adjacent substrate;
• and
• a second liquid crystal material sealed between said third and fourth substrates and being twisted in a second twist direction opposite to the first twist direction at substantially the same twist angle as that of said first liquid crystal material, said second liquid crystal material having a product .DELTA.n.sub.2 .multidot.d.sub.2 of a refractive index anisotropy .DELTA.n.sub.2 and a layer thickness d.sub.2 of said second liquid crystal material which is smaller than the product .DELTA.n.sub.1 .multidot.d.sub.1 of said first liquid crystal material;
• first and second polarizing plates arranged at positions to sandwich said first, second, third and fourth substrates such hat polarization axes of said first and second polarizing plates are substantially perpendicular to each other;
• and
• optical means for enlarging an image formed by said display liquid crystal cell;
• and
• means for holding said display liquid crystal cell and said compensation liquid crystal cell such that said display liquid crystal cell and said compensation liquid crystal cell are separated from each other by a distance larger than a depth of focus of said optical means.