Color mixing with total internal reflector and center reflector

Patent metadata

Field	Value
Publication number	US-11774063-B2
Application number	US-202017771915-A
Country	US
Kind code	B2
Filing date	Oct 20, 2020
Priority date	Oct 28, 2019
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

A color mixing lens assembly is provided. The color mixing assembly may include a center mixing structure arranged concentrically within the optic. The center mixing structure may be configured to receive a first portion of electromagnetic radiation from a light receiving structure. The center mixing structure may include a plated surface. The center mixing structure may include a center kick structure arranged concentrically within the center mixing structure. The center kick structure may be configured to reflect the first portion of the electromagnetic radiation towards the plated surface. The center mixing structure may be configured to reflect the first portion of the electromagnetic radiation from the plated surface through an exit surface of the optic. The optic may be configured to reflect a second portion of the electromagnetic radiation received from the light source structure through the exit surface of the optic.

First claim

The invention claimed is:

1. A color mixing lens assembly comprising:
at least one light source arranged to produce a first electromagnetic radiation and a second electromagnetic radiation;
an optic arranged about the at least one light source comprising:
a light source receiving structure configured to receive the first and second electromagnetic radiation from the at least one light source;
a center mixing structure arranged concentrically within the optic and configured to receive a first portion of the first and second electromagnetic radiation from the light source receiving structure comprising:
a plated surface;
a center kick structure arranged concentrically within the center mixing structure, wherein the center kick structure is a layer of optical structures, wherein the center kick structure is configured to reflect the first portion of the first and second electromagnetic radiation towards the plated surface;
wherein the center mixing structure is configured to reflect the first portion of the first and second electromagnetic radiation from the plated surface through an exit surface of the optic;

wherein the optic is configured to reflect a second portion of the first and second electromagnetic radiation received from the light source receiving structure through the exit surface of the optic.

2. The color mixing lens assembly of claim 1 , wherein the optical structures are conical and/pyramidal.

3. The color mixing lens assembly of claim 1 , wherein the optical structures are prismatic.

4. The color mixing lens assembly of claim 1 , wherein the layer is a holographic film.

5. The color mixing assembly of claim 1 , wherein the optical structures are arranged radially about the layer.

6. The color mixing assembly of claim 1 , wherein the exit surface is a microlens.

7. The color mixing assembly of claim 6 , wherein the microlens is textured.

8. The color mixing assembly of claim 1 , wherein the first portion of the first and second electromagnetic radiation exits the light source receiving structure through a flat surface.

9. The color mixing assembly of claim 1 , wherein the center mixing structure is frustoconical.

10. The color mixing assembly of claim 1 , wherein the plated surface is a specular coating.

11. A method for color mixing using a color mixing lens assembly, the method comprising:
generating, via at least one radiation source, a first electromagnetic radiation and a second electromagnetic radiation;
receiving, at a light source receiving structure of an optic, the first electromagnetic radiation and a second electromagnetic radiation from the at least one radiation source;
receiving by a center mixing structure arranged concentrically within the optic, a first portion of the first and second electromagnetic radiation from the light receiving structure;
reflecting, by center kick structure arranged concentrically within the center mixing structure, the first portion of the first and second electromagnetic radiation towards a plated surface of the center mixing structure, wherein the center kick structure is a layer of optical structures;
reflecting, by the plated surface, the first portion of the first and second electromagnetic radiation through an exit surface of the optic; and
reflecting by the optic, a second portion of the first and second electromagnetic radiation through the exit surface of the optic.

12. The method of color mixing of claim 11 , the optical structures are conical.

13. The method of color mixing of claim 11 , wherein the center mixing structure is frustoconical.

Assignees

• Signify Holding Bv

Inventors

• Roth Eric Anthony

Classifications

• F21V5/04 Primary

  of lens shape · CPC title

• F21V5/002

  using microoptical elements for redirecting or diffusing light · CPC title

• F21V7/0091 Primary

  using total internal reflection · CPC title

• G02B19/0028

  refractive and reflective surfaces, e.g. non-imaging catadioptric systems · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title