US 7,008,065 B2 · Color component aperture stops in projection display system

Abstract

A projection display system employs one or more color modifying aperture stops, such as apodizing aperture stops, to provide high contrast, balanced color and high throughput. One projection system includes a reflective liquid crystal-on-silicon light valve positioned with a polarizing beam splitter, such as a wire grid polarizing beam splitter, for each of the primary color component light paths to separately impart image information into each of the primary color components of light. A color combiner receives and combines the primary color components of light with imparted image information to provide light representing a polychromatic display image. At least one aperture stop is positioned along at least one of the primary color component light paths to balance relative intensities of the primary color components of light.

Claims20

Dependent claims

An electronic projection system, comprising:

an illumination system generating polychromatic light with plural primary color components;
at least one color modifying aperture stop to selectively block at least one of the primary color components of light relative to another primary color component of light to provide balance between the light components, the at least one aperture stop including an apodizing aperture stop with an annular color filter corresponding to the at least one primary color component of light;
one or more electronic light valves that imparts or impart image information into each of the primary color components of light;
and
first and second sets of relay optics that establish three telecentric regions in the system.

2 more elements

Dependencies are inferred from the claim text.

Color component aperture stops in projection display system

Life of this patent

Color component aperture stops in projection display system

Life of this patent

Abstract

Claims20