Liquid crystal display panel and projector utilizing the same

DETAILED DESCRIPTION In consideration of the foregoing, an object of the present invention is to provide a liquid crystal display device capable of improving the optical transmittance.
Another object of the present invention is to provide a compact liquid crystal display panel, capable of preventing intrusion of alkali ions into the TFT without deteriorating the function of the liquid crystal alignment film.
In a first embodiment of the present invention, the microlenses are so provided that the principal rays of incident light to the microlenses pass through the centers of the apertures of the liquid crystal pixels, and the distance between the microlenses and the liquid crystal layer gradually decreases from the central portion of the liquid crystal display panel to the peripheral portion thereof.
In a second embodiment of the present invention, in a liquid crystal display device composed of a pair of substrates sandwiching a liquid crystal layer, a lens array corresponding to the pixel arrangement of said liquid crystal layer is formed inside a substrate at the light entrance side, at a position of a predetermined distance from said liquid crystal layer.
In this configuration, said lens array may be formed by an ion exchange method, and such lens array formed by the ion exchange method may assume the form of an array of cylindrical lenses or of a fly's eye lens.
Also said substrate at the light entrance side may be provided with a first transparent member having said lens array at the surface of said liquid crystal layer, and a second transparent member of a thickness substantially same as said predetermined distance, adhered to the surface of said first transparent member at the liquid crystal layer side, in such a manner as to sandwich said lens array by said first and second transparent members.
Said predetermined distance may be selected substantially equal to the focal length of said lens array, or may be selected as to satisfy a condition 2L.
multidot.
tan.
theta.
.
ltoreq.
W, wherein L is said predetermined distance, W is the pixel width of said liquid crystal layer, and