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

• US 10,267,486 B1
• Filed: 03/19/2018
• Issued: 04/23/2019
• Est. Priority Date: 01/11/2018
• Status: Active Grant

• Current Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Original Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Inventors: Mao, An, Malone, Gregory, Krass, Robert M., Ramer, David P., Rogers, Rashmi Kumar, Phipps, James Michael, Lyons, Steve
• Primary Examiner(s): Hammond, Dedei K
• Application Number:
  US15/924,868
• Time in Patent Office: 400 Days
• Field of Search: None
• CPC Class Codes: F21V 23/003 the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
• CPC Class Codes: F21V 33/0052 Audio or video equipment, e.g. televisions, telephones, cameras or computers; Remote control devices therefor
• CPC Class Codes: F21V 5/007 Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane combination of two or more refractors F21V5/008
• CPC Class Codes: F21V 7/0091 using total internal reflection
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
• CPC Class Codes: H05B 45/30 Driver circuits

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.

Claims

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 includes left and right output shoulder portions linearly arranged on opposing sides of a length of the output body portion; and

the left and right output shoulder portions include a continuous planar surface.

19. The lighting device of claim 18, wherein:

the output lateral portion includes a spherical surface; and

the output body portion includes an aspherical surface.

20. The lighting device of claim 19, wherein the output shoulder portion abuts the output body portion and slopes upwards from the output body portion to intersect the output lateral portion.

21. An optical device comprising:

an optical-to-electrical transducer matrix, each optical-to-electrical transducer in the optical-to-electrical transducer matrix being configured to be driven by received light to produce a respective electrical signal and to be individually activated for outputting the respective electrical signal in response to the received light; and

an optical lens positioned over the optical-to-electrical transducer matrix including an input surface and an output surface coupled to direct light to the optical-to-electrical transducer matrix;

wherein;

the input surface includes an input lateral portion, an input shoulder portion, and an input body portion;

the input lateral portion extends towards the optical-to-electrical transducer matrix, curves towards the input peripheral portion, and intersects the output shoulder portion; and

the input lateral portion, the input shoulder portion, the input body portion, the output peripheral portion, and the output central portion each include a conical surface.

22. The optical device of claim 21, wherein:

the conical surface of the input lateral portion includes a truncated paraboloid shape;

the conical surface of the input body portion includes a truncated ellipsoid or spheroid shape;

the conical surface of the input shoulder portion includes a circular planar surface forming a planar ring around the input body portion;

the conical surface of the output peripheral portion includes a truncated hyperboloid of one sheet shape; and

the conical surface of the output central portion includes another truncated ellipsoid or spheroid shape.

23. The optical device of claim 21, wherein:

the optical-to-electrical transducer matrix includes an inner optical-to-electrical transducer matrix of middle optical-to-electrical transducers; and

the optical-to-electrical transducer matrix includes an outer optical-to-electrical transducer matrix of outer optical-to-electrical transducers.

24. The optical device of claim 23, wherein:

the middle optical-to-electrical transducers are arranged in rows and columns;

the outer optical-to-electrical transducers are annularly arranged as an outer ring around the middle optical-to-electrical transducers; and

each optical-to-electrical transducer is a photo sensor or a photovoltaic device.

25. An optical lens comprising:

a first surface and a second surface having at least one portion that includes a conical surface;

the first surface including a peripheral portion and a central portion, wherein;

the conical surface of the peripheral portion includes a truncated hyperboloid of one sheet shape; and

the conical surface of the central portion includes a truncated ellipsoid or spheroid shape; and

the second surface including a lateral portion, a shoulder portion, and a body portion, wherein;

the conical surface of the lateral portion includes a truncated paraboloid shape;

the conical surface of the body portion includes another truncated ellipsoid or spheroid shape; and

the conical surface of the shoulder portion includes a circular planar surface forming a planar ring around the body portion.

26. A device comprising the optical lens of claim 25, in combination with:

a circuit board including a plurality of individually operable transducers optically coupled to the first surface of the optical lens, each transducer of a type capable of being driven by electrical power to emit light or of being driven by light to produce an electrical signal.

27. The device of claim 26, further comprising:

a controller coupled to selectively activate the transducers to selectively adjust a beam of light output or a field of view of the device through the optical lens.

28. The device of claim 26, wherein the transducers are light sources.

29. The device of claim 26, wherein the transducers are optical-to-electrical transducers.