Uniformity enhancement of a color mixing compact image projector
AssigneeLumus Ltd.
InventorEitan RONEN
Life of this patent
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Abstract
A light projecting system may include a discrete light source matrix for emitting light corresponding to an image. The system may also include a waveguide formed from transparent material and having a coupling-in interface for coupling in the light corresponding to the image into the waveguide, and a coupling-out interface for coupling out the image out of the waveguide. The system may include an inner partially reflective surface and one or more partial lenses for enhancing color uniformity of the light projecting system.
Claims20
A light projecting system for uniformity enhancement of color mixing comprising:
- a discrete light source matrix for emitting light corresponding to an image;
- a waveguide formed from transparent material and having a coupling-in interface for coupling in the light corresponding to the image into the waveguide, and a coupling-out interface for coupling out the image out of the waveguide;
- an inner partially reflective surface disposed in the waveguide extending along the length of the waveguide, the inner partially reflective surface positioned diagonally across a cross-section that is perpendicular to the length of the waveguide;
- and
- one or more partial lenses disposed between the discrete light source matrix and the coupling-in interface, the one or more partial lenses overlaying only 25% to 75% of an area of the discrete light source matrix or an area of the coupling-in interface.
A light projecting system for uniformity enhancement of color mixing comprising:
- a discrete light source matrix for emitting light corresponding to an image;
- a waveguide formed from transparent material and having a coupling-in interface for coupling in the light corresponding to the image into the waveguide, and a coupling-out interface for coupling the image out of the waveguide;
- and
- an inner partially reflective surface disposed in the waveguide extending along the length of the waveguide, the inner partially reflective surface positioned diagonally across a cross-section that is perpendicular to the length of the waveguide.
A light projecting system for uniformity enhancement of color mixing comprising:
- a discrete light source matrix for emitting light corresponding to an image;
- a waveguide formed from transparent material and having a coupling-in interface for coupling in the light corresponding to the image into the waveguide, and a coupling-out interface for coupling out the image out of the waveguide;
- and
- one or more partial lenses disposed between the discrete light source matrix and the coupling-in interface, the one or more partial lenses overlaying 25% to 75% of a) an area of the coupling-in interface or b) an output area of the discrete light source matrix.
A method for enhancing color uniformity of a compact light projector comprising:
- providing a discrete light source matrix for emitting light corresponding to an image;
- providing a waveguide with a rectangular or circular cross-section, the waveguide having a coupling-in interface for coupling light corresponding to the image into the waveguide and an inner partially reflective interface inside the waveguide;
- positioning the discrete light source matrix in optical communication with the coupling-in interface of the waveguide;
- and
- reflecting a first portion of the light emitted by the discrete light source matrix from the inner partially reflective interface and transmitting a second portion of the light emitted by the discrete light source matrix through the inner partially reflective interface to improve color mixing of an output of the compact light projector.
Dependencies are inferred from the claim text.