US 6,601,957 B2 · Projection-type image displaying device

Abstract

A projection-type image displaying device includes liquid crystal elements for modulating light rays having wavelength regions different from each other, a color combining optical element for combining the light rays modulated by the liquid crystal display elements, and a projection type optical system for projecting light rays combined by the color combining optical element to display an image. Polarizing elements are disposed on an incidence side and an exit side of the liquid crystal display elements. Optically anisotropic elements for correcting the optical anisotropy of each of the liquid crystal elements are disposed between the polarizing elements. An air-reduced distance Linp between an entrance pupil of the projection optical system and display surfaces of the liquid crystal display element and diagonal length Ldisp across corners of the display surface of the liquid crystal display elements meet the predetermined condition.

Claims23

Dependent claims

A projection-type image displaying device comprising:

at least one image display element for modulating light from a light source;
and
a projection optical system for projecting light from said at least one image display element;
wherein an air-reduced distance Linp between an entrance pupil of said projection optical system and a display surface of said image display element and a diagonal length Ldisp across corners of the display surface of said image display element meet the following condition:
1.5<Linp/Ldisp<4.

2 more elements

A projection-type image displaying device comprising:

a plurality of liquid crystal display elements for modulating a plurality of light rays having wavelength regions different from each other respectively;
a color combining optical element for combining the light rays modulated by said plural liquid crystal display elements;
a projection optical system for projecting a light ray combined by said color combining optical element;
polarizing elements disposed on an incidence side and an exit side of each of said plural liquid crystal display elements;
and
at least one optically anisotropic element disposed between said polarizing elements on the incidence side and the exit side of each of said liquid crystal elements in an optical path of at least one light ray among said plural light rays;
wherein a light incidence side of said projection optical system is configured to be a non-telecentric system and an air-reduced distance Linp between an entrance pupil of said projection optical system and display surface of said liquid crystal display element and diagonal length Ldisp across corners of the display surface of said liquid crystal display element meet the following condition:
1.5<Linp/Ldisp<4.

5 more elements

Dependencies are inferred from the claim text.

Projection-type image displaying device

Life of this patent

Projection-type image displaying device

Life of this patent

Abstract

Claims23