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1. WO2020207957 - MICRO LED SHEET WITH SMALL SPHERES TO ENABLE DIGITAL BEAM SHAPING

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[ EN ]

CLAIMS:

1. A lighting device (1100) comprising a first 2D arrangement (100) of a plurality n of light sources (10) and a second 2D arrangement (200) of a plurality m of beam shaping elements (20) configured downstream of the light sources (10), wherein:

the light sources (10) are configured to generate light source light (11), wherein the n light sources (10) comprises a plurality k of individually controllable subsets (110) of light sources (10), wherein the beam shaping elements (20) are configured to shape a beam of the light source light (11) of the n light sources (10), and wherein n > 16, m > 4, n/m > 1, and k < n/2;

upstream of each beam shaping element (20) light sources (10) are configured of different individually controllable subsets (110), and wherein two or more of the beam shaping elements (20) have different spatial configurations relative to the light sources (10) that are configured upstream of the respective beam shaping elements (20);

wherein the light sources (10) comprise solid state light sources having first dimensions dl selected from the group of a first length, a first width, a first diagonal length, and a first diameter, wherein the beam shaping elements (20) comprise light transmissive elements having second dimensions d2 selected from the group of a second length, a second width, a second diagonal length, and a second diameter, wherein d2 > 4*dl.

2. The lighting device (1100) according to claim 1, wherein:

the lighting device (1100) comprises p partitions (300) comprising (i) ml beam shaping elements (20) and (ii) nl light sources (10) configured upstream of the ml beam shaping elements (20), wherein at least part of the total number of nl light sources (10) are comprised by the plurality k of individually controllable subsets (110) of light sources (10), wherein each of the ml beam shaping elements (20) and the nl light sources (10) configured upstream thereof have a configuration relative to each other, wherein l£p£m, 4< ml<m, and 16<nl<n, and wherein irrespective of a distance between second 2D arrangement (200) and the respective light sources (10) the ml configurations mutually differ.

3. The lighting device (1100) according to claim 2, wherein (i) the nl light sources (10) are comprised by a first arrangement of at least part of the total number of n light sources (10), wherein the first arrangement is random or quasi random, and/or (ii) wherein the ml beam shaping elements (20) are comprised by a second arrangement of at least part of the total number of m beam shaping elements (20), wherein the second arrangement is random or quasi random.

4. The lighting device (1100) according to any one of the preceding claims, comprising a plurality of spacers (410), wherein the spacers (410) define the position of at least part of the total number of m beam shaping elements (20), wherein the spacers (410) are comprised by a third arrangement, wherein the third arrangement is random or quasi random.

5. The lighting device (1100) according to any one of the preceding claims 1-2, wherein the light sources (10) have a first pitch (xl) and the beam shaping elements (20) have a second pitch (x2), wherein the first pitch (xl) is smaller than the second pitch (x2), and wherein a ratio of the second pitch (x2) to the first pitch (xl) defined as a*x2/xl is not an integer, wherein a is an integer selected from the range of 1-10.

6. The lighting device (1100) according to any one of the preceding claims, wherein the light sources (10) comprise solid state light sources, wherein the beam shaping elements (20), wherein the second 2D arrangement (200) of beam shaping elements (20) is random or quasi random.

7. The lighting device (1100) according to any one of the preceding claims, wherein k < n/4.

8. The lighting device (1100) according to claim 7, wherein the first dimensions dl are at maximum 200 pm, and wherein the second dimensions d2 are at least 800 pm, wherein the dimensions d2 are second diameters.

9. The lighting device (1100) according to any one of the preceding claims 7-8, wherein the wherein the beam shaping elements (20) comprise a plurality p2 of subsets of beam shaping elements (20) wherein the subsets mutually differ with respect to at least one of the second dimensions d2, wherein p2>2.

10. The lighting device (1100) according to any one of the preceding claims, wherein the wherein the beam shaping elements (20) comprise spheres.

11. The lighting device (1100) according to any one of the preceding claims, wherein the lighting device (1100) comprises a monolayer (220) of the beam shaping elements (20), and wherein n>100, n/m>4, k>10, and p>10.

12. A luminaire (1200) comprising the lighting device (1100) according to any one of the preceding claims 1-11.

13. A lighting system (1000) comprising the lighting device (1100) according to any one of the preceding claims 1-11, and a control system (30), configured to control the plurality k of individually controllable subsets (110) of light sources (10).

14. The lighting system (1000) according to claim 13, wherein the control system (30) is configured to execute in a calibration mode a calibration routine wherein the calibration routine determines as function of (i) the plurality k of individually controllable subsets (110) of light sources (10) and (ii) one or more of user input information and a calibration sensor signal, a set of (a) intensity distribution characteristics and (b) related light source settings of the plurality k of individually controllable subsets (110) of light sources (10).

15. The lighting system (1000) according to claim 14, further comprising one or more optical sensors (40) external of the lighting device (1100) and functionally coupled to the control system (30), wherein the one or more optical sensors (40) are configured to generate the calibration sensor signal during the calibrate routine.