# US 12,111,022 B2 · Light emitting module comprising led arrays for symmetrical and asymmetrical lighting

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- Number: US 12,111,022 B2
- Document ID: US12111022B2
- Status: Granted
- Kind: B2
- Application number: 18/268,506
- Filed: 2021-12-22
- Published: 2024-02-01
- Granted: 2024-10-08
- Earliest claimed: 2021-01-05
- Assignees: Signify Holding B.V.
- Applicants: Signify Holding B.V.
- Inventors: Ties Van Bommel; Jeffrey Huyghe
- Web page: https://patentgrep.com/patent/US12111022B2

## CPC

- F21K 9/00: Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K 9/62: using mixing chambers, e.g. housings with reflective walls
- F21Y 2105/12: characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
- F21Y 2105/18: annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
- F21Y 2113/13: comprising an assembly of point-like light sources
- F21Y 2115/10: Light-emitting diodes [LED]
- 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
- 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-emitting module (100) is disclosed, the light-emitting module comprising a first light-emitting diode, LED, array (104) arranged on a substrate (102). The first LED array has a first perimeter (106) and comprises a plurality of first LEDs (108) configured to emit first light. The light-emitting module further comprises a second LED array (110) arranged on the substrate. The second LED array has a second perimeter (112), smaller than the first perimeter and comprises a plurality of second LEDs (114) configured to emit second light. The second LED array is arranged off-center within the first LED array. Further, the light-emitting module comprises a controller (116) configured to individually control the first LED array and the second LED array.

## Claims

### Claim 1

A light-emitting module comprising:
a first light-emitting diode, LED, array being arranged on a substrate and having a first perimeter, said first LED array comprising a plurality of first LEDs configured to emit first light;
a second LED array being arranged on the substrate and having a second perimeter smaller than said first perimeter, said second LED array comprising a plurality of second LEDs configured to emit second light; and
a controller configured to individually control the first LED array and the second LED array,
wherein the second LED array is arranged off-center within said first LED array and,
wherein said first perimeter encloses a first surface area and said second perimeter encloses a second surface area, and wherein at least 70% of the second surface area is arranged in one half of the first surface area wherein an optical structure is arranged along the second perimeter to redirect said first light and said second light toward the substrate and/or toward a housing in which the substrate is arranged.

### Claim 2 (depends on 1)

The light-emitting module of claim 1, further comprising a semi-reflective light exit window configured to couple out light emitted by the first LED array and the second LED array, wherein said optical structure has a height (H) which is in the range of 0.3-0.7 times a gap (G) between said substrate and said semi-reflective window.

### Claim 3 (depends on 1)

The light-emitting module of claim 1, wherein said first perimeter is circular and has a first radius R1 and said second perimeter is circular and has a second radius R2, and wherein said first and second radii fulfil the relation 0.3R1≤R2≤0.8R1.

### Claim 4 (depends on 1)

The light-emitting module of claim 1, wherein first LEDs of the first LED array are arranged surrounding the second LED array.

### Claim 5 (depends on 1)

The light-emitting module of claim 1, wherein said second LED array further comprises first LEDs, wherein said first light has a first LED color temperature T1 and said second light has a second LED color temperature T2, and wherein a difference between the first LED color temperature T1 and the second LED color temperature T2 is larger than 500 K.

### Claim 6 (depends on 5)

The light-emitting module of claim 5, wherein the first LED color temperature T1 is lower than, or equal to, 3500 K and the second LED color temperature T2 is higher than, or equal to, 4000 K.

### Claim 7 (depends on 1)

The light-emitting module of claim 1, wherein said second LED array is free of first LEDs, wherein said first light has a first LED color temperature T1 and said second light has a second LED color temperature T2, and wherein a difference between the first LED color temperature T1 and the second LED color temperature T2 is smaller than 300 K.

### Claim 8 (depends on 1)

The light-emitting module of claim 1, wherein said second LED array further comprises third LEDs configured to emit third light having a third LED color temperature T3, and wherein a first LED color temperature T1 of the first light is at least 500 K higher than the third LED color temperature T3.

### Claim 9 (depends on 1)

The light-emitting module of claim 1, further comprising a semi-reflective light exit window configured to couple out light emitted by the LEDs of the first and second LED array, wherein a gap height (G) between the substrate and the semi-reflective light exit window is 1-4 times an average pitch (P) between the LEDs.

### Claim 10 (depends on 1)

The light-emitting module of claim 1, wherein
light emitted by said first LED array has a first array color temperature CT1;
light emitted by said second LED array has a second array color temperature CT2; and
said controller is configured to select between at least two control modes, wherein:
in a first control mode, both the first LED array and the second LED array are turned on, and the second array color temperature CT2 is equal to the first array color temperature CT1; and
in a second control mode, the second LED array is turned on, the first LED array being turned off, or the first LED array being turned on and controlled to emit light with a lower intensity than in the first control mode, the first array color temperature CT1 being the same as in the first control mode.

### Claim 11 (depends on 10)

The light-emitting module of claim 10, wherein, in said second control mode, the second array color temperature CT2 is the same as the first array color temperature CT1.

### Claim 12 (depends on 10)

The light-emitting module of any of claim 10, wherein, in said second control mode, the second array color temperature CT2 is different from the first array color temperature CT1.

### Claim 13 (depends on 1)

A luminaire comprising a light-emitting module as defined in claim 1.