US 2008/0174994 A1 · ILLUMINATION SYSTEM

Abstract

An illumination system including a first integrator, a first dichroic element, a second dichroic element, a first light source, and a second light source is provided. The first integrator has a first light incident end and a first light exit end. The first and the second dichroic elements are respectively disposed at two different parts adjacent to the first light incident end. The first dichroic element, the second dichroic element, and the first light incident end are arranged along a triangular track. The first light source emits a first color light. The second light source emits a second color light. The first color light passes through the first dichroic element and is partially reflected by the second dichroic element to the first light incident end. The second color light passes through the second dichroic element and is partially reflected by the first dichroic element to the first light incident end.

Claims24

Dependent claims

An illumination system, comprising:

a first integrator, having a first light incident end and a first light exit end opposite to each other;
a first dichroic element, disposed at a part adjacent to the first light incident end;
a second dichroic element, disposed at another part adjacent to the first light incident end, wherein the first dichroic element, the second dichroic element, and the first light incident end are arranged along a triangular track;
a first light source, disposed adjacent to the first dichroic element for emitting a first color light;
and
a second light source, disposed adjacent to the second dichroic element for emitting a second color light,
wherein the first color light passes through the first dichroic element and is partially reflected by the second dichroic element to the first light incident end, and the second color light passes through the second dichroic element and is partially reflected by the first dichroic element to the first light incident end.

4 more elements

An illumination system, comprising:

a first integrator, having a first light incident end, a first light exit end opposite to the first light incident end, and a plurality of sidewalls connected between the first light incident end and the first light exit end, wherein one of the sidewalls has a first incident region adjacent to the first light incident end;
a first light source, disposed adjacent to the first light incident end for emitting a first color light towards the first light incident end;
a second light source, disposed adjacent to the first incident region for emitting a second color light towards the first incident region;
a first dichroic element, disposed inside the first integrator and located on transmission paths of the first color light and the second color light, wherein the first color light passes through the first dichroic element toward the first light exit end, and the second color light is reflected by the first dichroic element toward the first light exit end;
and
a second dichroic element, disposed between the first dichroic element and the second light source and located at the first incident region, wherein the second color light passes through the second dichroic element, and the first color light is reflected by the second dichroic element.

3 more elements

Dependencies are inferred from the claim text.

Illumination system

Life of this patent

Illumination system

Life of this patent

Abstract

Claims24