Light engines with dynamically controllable light distribution

Patent metadata

Field	Value
Publication number	US-10845529-B2
Application number	US-201916403478-A
Country	US
Kind code	B2
Filing date	May 3, 2019
Priority date	May 4, 2018
Publication date	Nov 24, 2020
Grant date	Nov 24, 2020

Abstract

A light engine system is disclosed in which the light engine system comprises a light engine. The light engine comprises independently addressable LED segments, each LED segment comprising LEDs and a flexible PCB to which the segments are attached. A light guide plate (LGP) is provided into which light from the segments is introduced, in which the light is guided, and from which the light exits to provide illumination. The segments emit light in all directions of a plane created by the LGP. A diffuser opposes a first surface of the LGP over substantially the entirety of the LGP. The diffuser diffuses light exiting the LGP into the environment away from the light engine.

First claim

What is being claimed is:

1. A light engine system comprising an apparatus of a light engine, the light engine comprising:
a plurality of independently addressable light emitting diode (LED) segments, each LED segment comprising a plurality of LEDs;
a flexible printed circuit board (PCB) to which the LED segments are attached;
a light guide plate (LGP) into which light from the LED segments is introduced, in which the light from the LED segments is guided, and from which the light from the LED segments exits to provide illumination, the LED segments configured to emit light in all directions of a plane created by the LGP;
a diffuser opposing a first surface of the LGP over substantially the entirety of the LGP, the diffuser configured to diffuse light exiting the LGP into the environment away from the light engine; and
a core comprising an opening extending completely through the core, the opening defining an inner surface of the core, and the flexible PCB comprising:
a body adjacent to one of the inner surface of the core or an outer surface of the core and to which the LED segments are attached, and
a plurality of legs physically coupled to, and extending from the body, the plurality of legs bent around a bottom of the core to be adjacent and traverse to the other of the inner or outer surface, each leg associated with a different LED segment.

2. The system of claim 1 , wherein:
the LGP has a frustoconical shape,
the light engine further comprises a reflector on a second surface of the LGP opposing the first surface, the reflector covering the second surface of the LGP and an outer edge surface of the LGP.

3. The system of claim 1 , wherein:
the LED segments are arranged in the shape of an octagon, and
the LED segments are selectable from change of illumination of:
a single LED segment,
two LED segments on opposing sides of the octagon,
four LED segments on opposing sides of the octagon, with pairs of the LED segments adjacent to each other,
four LED segments, with pairs of the LED segments adjacent to each other and an inactive LED segment being disposed between the pairs,
four LED segments, with the four LED segments contiguous,
four LED segments, with the LED segments separated by a non-active LED segment, and
all LED segments.

4. The system of claim 1 , wherein:
light distribution from the light engine is selectable from about a:
360° transmission,
270° transmission in a contiguous distribution,
180° transmission in a contiguous distribution,
180° transmission in a discontiguous distribution of two transmission portions, with 45° and 135° gaps between the transmission portions,
180° transmission in a discontiguous distribution of two transmission portions, with 90° gaps between the transmission portions,
90° transmission in a discontiguous distribution of two transmission portions, with 135° gaps between the transmission portions, and
90° transmission in a contiguous distribution.

5. The system of claim 1 , further comprising:
a plurality of light engines, each able to be independently controlled.

6. The system of claim 1 , wherein:
the light engine further comprises control circuitry connected with the legs of the flexible PCB, the control circuitry configured to independently control parameters of the LED segments to provide a preset illumination distribution and intensity based on user input,
the control circuitry comprises a first PCB having a first surface that opposes the LED segments, a second surface opposing the first surface, and an opening extending between the first and second surfaces, and
the legs of the flexible PCB extend through the opening and are soldered to control contacts of the first PCB on the second surface.

7. The system of claim 3 , wherein:
the change of illumination is activation or deactivation of the LED segments.

8. The system of claim 5 , wherein:
a single light distribution configures each of a set of the light engines at the same time.

9. The system of claim 6 , wherein:
the control circuitry further comprises a second PCB that is detachable from the first PCB, and
the second PCB comprises communication circuitry configured to wirelessly communicate with a user interface via a supported communication protocol to control light output from each of the LED segments accordingly.

10. The system of claim 8 , wherein:
each of the set of the light engines contains the same number of LED segments in the same configuration.

11. The system of claim 8 , wherein:
each of the set of the light engines produces the same light distribution based on the single light distribution.

12. The system of claim 8 , wherein:
the set of the light engines produces different light distributions based on the single light distribution, the light distribution of each of the set of the light engines dependent on a location of the light engine relative to other light engines of the set of the light engines.

13. A light engine system comprising an apparatus of a light engine, the light engine comprising:
a plurality of independently addressable light emitting diode (LED) segments, each LED segment comprising a plurality of LEDs;
a flexible printed circuit board (PCB) to which the LED segments are attached;
a core comprising an opening extending completely through the core, the opening defining an inner surface of the core, the flexible PCB comprising:
a body adjacent to one of the inner surface of the core or an outer surface of the core and to which the LED segments are attached, and
a plurality of legs physically coupled to, and extending from the body, the plurality of legs bent around a bottom of the core and traverse to the other of the inner or outer surface of the core, each leg associated with a different LED segment;

a light guide plate (LGP) having an entrance surface in which light from the LED segments is introduced and an exit surface from which the light in the LGP exits, the LGP having an opening in which the core is disposed; and
a diffuser opposing the exit surface of the LGP and having an opening that is colinear with the opening in the LGP, the diffuser configured to diffuse light exiting the LGP.

14. The system of claim 13 , further comprising a reflector on a top surface of the LGP opposing the bottom surface of the LGP, the reflector covering the top surface of the LGP and an outer edge surface of the LGP.

15. The system of claim 13 , further comprising another plurality of LEDs adjacent to another entrance surface of the LGP opposite to the entrance surface.

16. The system of claim 13 , wherein:
each LED segment is disposed on a different face of an octagon, and
the LED segments are independently selectable to produce different light distributions based on 2 n light segments being active, where n=0-3.

17. The system of claim 13 , wherein the LGP and diffuser are ovular.

18. The system of claim 16 , wherein for n=1, only one pair of LED segments that are disposed on opposing sides of the octagon are able to be activated, with remaining LED segments deactivated.

19. The system of claim 16 , wherein for n=2:
only an adjacent pair of LED segments and corresponding pair of LED that are disposed on opposing sides of the octagon as the adjacent pair of LED segments are able to be activated, with remaining LED segments deactivated,
only two adjacent pairs of LED segments separated by a single LED segment are able to be activated, with remaining LED segments deactivated,
only four adjacent LED segments are able to be activated, with

Assignees

• Lumileds Holding Bv
• Lumileds Llc

Inventors

• Diana Frederic Stephane
• Qiu Yifeng
• Wasilko Michael
• Soleimani Nazila
• Den Breejen Jeroen
• Mcreynolds Alan Andrew
• Guth Gregory Donald

Classifications

• H05B47/1965

  using handheld communication devices · CPC title

• H05B47/198

  Grouping of control procedures or address assignation to light sources · CPC title

• H05B47/19

  via wireless transmission · CPC title

• G02B6/0046 Primary

  Tapered light guide, e.g. wedge-shaped light guide · CPC title

• H05B45/37

  Converter circuits · CPC title