Projection-type liquid crystal display apparatus

摘要

A projection-type liquid crystal display apparatus is provided for preventing a reduction in image quality due to deposited foreign substances such as dust, arc fluctuations of a light source and so on. An optical illumination system of a liquid crystal panel includes an integrator having a first lens array made up of a plurality of lens elements and a second lens array made up of lens element corresponding to the lens elements of the first lens array. A single ray bundle incident on the first lens array is split into a plurality of split ray bundles by the first lens array and pass through the corresponding lens elements of the second lens array and further through a collimator lens, dichroic mirrors and enter the liquid crystal panel. The liquid crystal panel is illuminated with the ray bundles sent from all the lens elements of the first lens array in a superimposing manner and the illuminance distribution is made even.