Lighting device with optical lens for beam shaping and illumination light source matrix

Patent metadata

Field	Value
Publication number	US-10267486-B1
Application number	US-201815924868-A
Country	US
Kind code	B1
Filing date	Mar 19, 2018
Priority date	Jan 11, 2018
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

An example lighting device has a luminaire. The luminaire includes an illumination light source matrix including illumination light sources configured to be driven by electrical power to emit light rays for illumination lighting. The luminaire further includes an optical lens positioned and configured to extend over the illumination light source matrix and including an input surface coupled to receive incoming light rays emitted by the illumination light sources and an output surface. Both the input surface and the output surface each include various portions to refract or total internally reflect the incoming light rays emitted by the illumination light sources passing through to shape or steer the illumination lighting into an outputted beam pattern. A coupled illumination light source driver selectively controls the illumination light sources individually or in combination to adjust the outputted beam pattern from the optical lens.

First claim

What is claimed is:

1. A lighting device comprising:
a luminaire comprising:
an illumination light source matrix including illumination light sources configured to be driven by electrical power to emit light rays for illumination lighting; and
an optical lens positioned and configured to extend over the illumination light source matrix and including an input surface coupled to receive incoming light rays emitted by the illumination light sources and an output surface, wherein:
the input surface includes an input peripheral portion and an input central portion to refract the incoming light rays emitted by the illumination light sources passing through to shape or steer the illumination lighting; and
the output surface includes an output lateral portion, an output shoulder portion, and an output body portion to further refract or total internally reflect the refracted incoming light rays passing through to shape or steer the illumination lighting into an outputted beam pattern; and

an illumination light source driver coupled to the illumination light source matrix of the luminaire to selectively control illumination light sources at different locations in the illumination light source matrix to emit light rays with different emission alignments relative to the input peripheral portion or the input central portion of the input surface of the optical lens, individually or in combination, to adjust the outputted beam pattern from the optical lens.

2. The lighting device of claim 1 , wherein:
the input peripheral portion, the input central portion, the output lateral portion, the output shoulder portion, and the output body portion each include a conical surface.

3. The lighting device of claim 2 , wherein:
the output shoulder portion is continuous and annularly arranged around the output body portion; and
the output lateral portion has a total internal reflection (TIR) contour.

4. The lighting device of claim 2 , wherein:
the conical surface of the input peripheral portion includes a truncated hyperboloid of one sheet shape; and
the conical surface of the input central portion includes a truncated ellipsoid or spheroid shape.

5. The lighting device of claim 4 , wherein:
the conical surface of the output lateral portion includes a truncated paraboloid shape; and
the conical surface of the output body portion includes another truncated ellipsoid or spheroid shape.

6. The lighting device of claim 5 , wherein:
the conical surface of the output shoulder portion includes a circular planar surface forming a planar ring around the output body portion.

7. The lighting device of claim 1 , wherein:
the illumination light source matrix includes an inner illumination light source matrix of middle illumination light sources; and
the illumination light source matrix includes an outer illumination light source matrix of outer illumination light sources.

8. The lighting device of claim 7 , wherein:
the middle illumination light sources are arranged in rows and columns; and
the outer illumination light sources are annularly arranged as an outer ring around the middle illumination light sources.

9. The lighting device of claim 8 , wherein to adjust the outputted beam pattern to achieve a symmetric beam distribution, the illumination light source driver is configured to selectively control the illumination light source matrix such that:
at least one of the middle illumination light sources of the inner illumination light source matrix is turned on or dimmed; and
all outer illumination light sources of the outer illumination light source matrix are turned off.

10. The lighting device of claim 9 , wherein a beam angle of the symmetric beam distribution achieves a spot lighting beam angle state.

11. The lighting device of claim 8 , wherein to adjust the outputted beam pattern to achieve a symmetric beam distribution, the illumination light source driver is configured to selectively control the illumination light source matrix such that:
all middle illumination light sources of the inner illumination light source matrix are turned off; and
all outer illumination light sources of the outer illumination light source matrix are turned on or dimmed.

12. The lighting device of claim 8 , wherein to adjust the outputted beam pattern to achieve an asymmetric beam distribution, the illumination light source driver is configured to selectively control the illumination light source matrix such that:
a subset of the outer illumination light sources of the outer illumination light source matrix are turned on or dimmed;
remaining outer illumination light sources excluded from the subset of the outer illumination light source sources are turned off; and
all middle illumination light sources of the inner illumination light source matrix are turned off.

13. The lighting device of claim 8 , wherein:
the output lateral portion includes a total internal reflection (TIR) contour;
incoming light rays for illumination lighting emitted by the inner illumination light source matrix and the outer illumination light source matrix first pass through the input surface where the incoming light rays undergo refraction to shape or steer the illumination lighting; and
all incoming light rays emitted by the inner illumination light source matrix and the outer illumination light source matrix that strike the output lateral portion undergo TIR to shape the illumination lighting.

14. The lighting device of claim 8 , wherein:
incoming light rays for illumination lighting emitted by at least one middle illumination light source of the inner illumination light source matrix first pass through the input surface where the incoming light rays undergo refraction to shape or steer the illumination lighting; and
after passing through the input surface, the refracted incoming light rays then pass through the output body portion or the output shoulder portion of the output surface where the incoming light rays are collimated to shape or steer the illumination lighting into a symmetric beam distribution.

15. The lighting device of claim 14 , wherein:
a first incoming light ray of the incoming light rays emitted by the at least one middle illumination light source of the inner illumination light source matrix undergoes refraction when passing through the input peripheral portion;
the first refracted incoming light ray then strikes the output lateral portion where the first refracted incoming light ray undergoes total internal reflection (TIR); and
the first TIR incoming light ray then passes through the output shoulder portion to undergo refraction to collimate the first TIR incoming light ray.

16. The lighting device of claim 14 , wherein:
incoming light rays for illumination lighting emitted by at least one outer illumination light source of the outer illumination light source matrix first pass through the input surface where the incoming light rays undergo refraction to shape or steer the illumination lighting; and
after passing through the input surface, the refracted incoming light rays then pass through the output body portion or the output shoulder portion of the output surface where the refracted incoming light rays undergo further refraction to shape or steer the illumination lighting into an asymmetric beam distribution.

17. The lighting device of claim 1 , wherein:
the input peripheral portion includes a spherical surface; and
the input central portion includes an aspherical surface.

18. The lighting device of claim 1 , wherein:
the output shoulder portion inc

Assignees

• Abl Ip Holding Llc

Inventors

• Mao An
• Malone Gregory
• Krass Robert M
• Ramer David P
• Rogers Rashmi Kumar
• Phipps James Michael
• Lyons Steve

Classifications

• G09G2320/0666

  for control of colour parameters, e.g. colour temperature · CPC title

• F21V33/0052

  Audio or video equipment, e.g. televisions, telephones, cameras or computers; Remote control devices therefor · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title

• G02B19/0028

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

• G02B19/0061

  the light source comprising a LED · CPC title