Prism device for light source

Abstract

The present invention relates to a prism device 100 for a projector, the prism device comprising a light source and a prism box 3, the prism box comprising first, second, third and fourth surfaces, S1-S4 and an original light L from the light source entering the prism box through the first surface, wherein the prism device further comprises an optical path adjusting means 10 and at least one light conversion means (phosphor wheel) 5 provided downstream from at least one of the first, second, third and fourth surfaces, the optical path adjusting means is configured to guide a first part of the original light through at least one of the second, third and fourth surfaces to the light conversion means, and enable a second part of the original light to emerge through at least one further surface of the second, third and fourth surfaces as an emergent surface, and is configured to guide a converted light Lll from the light conversion means to emerge in a direction parallel to an emergent direction passing through the emergent surface, and guide at least a part of unconverted original light from the light conversion means to emerge in a direction parallel to an emergent direction passing through the emergent surface.

Description

technical field [0001] The invention relates to a prism device for a light source. Background technique [0002] In the technology applied to existing projectors, for example, in DLP, LCD or LCoS type projectors, the technology of making light from a light source with different wavelengths exit through an exit port is used. However, in this process, such as the technology applied to DLP-type projectors, in order to allow light of different wavelengths to exit through the exit port, these lights are emitted to the exit port in chronological order, rather than passing through the exit port at the same time. However, such a design cannot give full play to the advantages of a three-chip LCD or LCoS projector. In addition, because there is no mechanism or device that can effectively recycle the unconverted light beam, during the exit process, the unconverted light beam cannot be fully utilized and wasted because it fails to exit from the exit port, which will also make the proje...

AI Technical Summary

Problems solved by technology

However, in this process, such as the technology applied to DLP-type projectors, in order to allow light of different wavelengths to exit through the exit port, these lights are emitted to the exit port in chronological order, rather than passing through the exit port at the same time. However, such a design cannot give full play to the advantages of a three-chip LCD or LCoS projector

In addition, because there is no mechanism or device that can effectively recycle the unconverted light beam, during the exit process, the unconverted light beam cannot be fully utilized and wasted because it fails to exit from the exit port, which will also make the projection The light efficiency of the light source of the machine is greatly reduced

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