# US 2019/0377128 A1 · Light engines with dynamically controllable light distribution

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- Number: US 2019/0377128 A1
- Document ID: US20190377128A1
- Status: Published application
- Kind: A1
- Application number: 16/403,478
- Filed: 2019-05-03
- Published: 2019-12-12
- Earliest claimed: 2018-05-04
- Assignees: Lumileds LLC
- Inventors: Frederic Stephane Diana; Yifeng Qiu; Michael Wasilko; Nazila Soleimani; Jeroen Den Breejen; Alan Andrew McReynolds; Gregory Donald Guth
- Web page: https://patentgrep.com/patent/US20190377128A1

## CPC

- G02B 6/0046: {Tapered light guide, e.g. wedge-shaped light guide}
- F21K 9/61: using light guides
- F21V 23/006: {the substrate being distinct from the light source holder}
- G02B 6/0051: {Diffusing sheet or layer}
- G02B 6/0068: {Arrangements of plural sources, e.g. multi-colour light sources}
- G02B 6/0083: {Details of electrical connections of light sources to drivers, circuit boards, or the like}
- H05B 45/10: Controlling the intensity of the light
- H05B 45/48: having LEDs organised in strings and incorporating parallel shunting devices
- H05B 47/19: via wireless transmission
- F21Y 2107/30: on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
- F21Y 2115/10: Light-emitting diodes [LED]
- H05B 45/37: Converter circuits
- H05B 47/1965: {using handheld communication devices}
- H05B 47/198: {Grouping of control procedures or address assignation to light sources}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## 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.

## Claims

### Claim 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; and
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,
wherein the light engine further comprises a core comprising an opening extending completely through the core, the opening defining an inner surface of the core, and the flexible PCB comprises:
a body adjacent to one of an inner or outer surface of the core and to which the LED segments are attached, and
a plurality of legs extending from the body and bent to be adjacent and traverse to the other of the inner or outer surface, each leg associated with a different LED segment.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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 lumination 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.

### Claim 4 (depends on 3)

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

### Claim 5 (depends on 1)

The system of claim 1, wherein:
light distribution from the light engine is selectable from:
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.

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 6)

The system of claim 6, wherein:
a single light distribution configures each of a set of the light engines at the same time.

### Claim 8 (depends on 7)

The system of claim 7, wherein:
each of the set of the light engines contains the same number of LED segments in the same configuration.

### Claim 9 (depends on 7)

The system of claim 7, wherein:
each of the set of the light engines produces the same light distribution based on the single light distribution.

### Claim 10 (depends on 7)

The system of claim 7, 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.

### Claim 11 (depends on 1)

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.

### Claim 12 (depends on 11)

The system of claim 11, 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.