NL2021671B1

NL2021671B1 - LIGHT EMITTING DEVICE WITH ADAPTABLE GLARE CLASS

Info

Publication number: NL2021671B1
Application number: NL2021671A
Authority: NL
Inventors: Dietens Maxime; Smets Paul; Caprara Roxane; Lang Vincent
Original assignee: Schreder Sa
Priority date: 2018-09-20
Filing date: 2018-09-20
Publication date: 2020-05-07

Abstract

A light emitting device comprising: a carrier; a plurality of light sources disposed on the carrier; a lens plate disposed on the carrier, comprising a flat portion and a plurality of lenses covering the plurality of light sources; and a light shielding structure mounted on said lens plate, comprising a plurality of reflective barriers, each comprising a base surface disposed on said flat portion, a top edge at a height above said base surface, and a first reflective sloping surface connecting the base surface and the top edge and facing one or more associated lenses of said plurality of lenses; Wherein said first reflective sloping surface is configured for reflecting light rays emitted through one or more associated first lenses of said plurality of lenses having a first incident angle with respect to an axis substantially perpendicular to the base surface comprised between a first predetermined angle and 90°, With a first reflection angle With respect to said axis smaller than 60°.A light emitting device comprising: a carrier; a plurality of light sources disposed on the carrier; a lens plate disposed on the carrier, comprising a flat portion and a plurality of lenses covering the plurality of light sources; and a light shielding structure mounted on said lens plate, comprising a plurality of reflective barriers, each comprising a base surface disposed on said flat portion, a top edge at a height above said base surface, and a first reflective sloping surface connecting the base surface and the top edge and facing one or more associated lenses of said plurality of lenses; Wherein said first reflective sloping surface is configured for reflecting light rays emitted through one or more associated first lenses of said plurality of lenses having a first incident angle with respect to an axis substantially perpendicular to the base surface comprised between a first predetermined angle and 90 ° , With a first reflection angle With respect to said axis smaller than 60 °.

Description

LIGHT EMITTING DEVICE WITH ADAPTABLE GLARE CLASS

FIELD OF INVENTION

The present invention relates to a light emitting device, and more particularly, to a light emitting device with an improved G/G* classification.

BACKGROUND

Optical elements, such as light emitting diodes (LEDs) and lenses, comprised in standard light emitting devices may emit light at large angles. In the designs of conventional light emitting devices, such as LED devices, the light rays generated by the light source may have large angles below the horizontal, and thus may result in glares that would cause discomfort for the user.

Therefore, light emitting devices, in particular outdoor luminaires, must comply with different glare classifications, usually abbreviated G or G* classifications. The G classification is defined in the CIE115:2010 standard, whereas the G* classification is defined by the EN 13201-2 standard. Such classifications are based on the maximal allowed ratio between the light intensity and the light flux at large angles below the horizontal, such ratio being generally expressed in cd/klm. The lowest G/G* classification, or Gl/G*l class, corresponds to the glariest situation for the user, causing the highest discomfort, whereas the highest G/G* classification, or G6/G*6 class, corresponds to the most comfortable situation for the user.

In order to reduce light intensities at large angles and improve the G/G* classification of a light emitting device, improved optical elements can be developed and manufactured. While the above mentioned goal can be achieved, manufacturing such optical elements can be time consuming and expensive, requiring large investment costs for replacing the existing optical elements on the light emitting devices. Moreover, in order to adapt the G/G* classification of a light emitting device, different types of optical elements are required, each given type corresponding to a given G/G* classification. Finally, for each type of optical elements corresponding to each G/G* classification, additional categories of optical elements may be required depending on the road type, e.g. depending on the width of a road (residential road, traffic route, highway, pedestrian path, etc.), or depending on its location (inside a city, in the countryside, etc.). This has the effect of increasing the amount of different optical elements to be manufactured in order to answer every need from the customers. This solution may involve high development, manufacturing, and maintenance costs.

SUMMARY

The object of embodiments of the invention is to provide a light emitting device comprising a light shielding structure. More in particular, embodiments of the invention aim at providing a light emitting device comprising a light shielding structure configured for cutting off or reflecting light rays having a large incident angle, thereby reducing the light intensities at large angles and improving the G/G* classification of the light emitting device.

According to a first aspect of the invention, there is provided a light emitting device comprising a carrier, a plurality of light sources disposed on the carrier, a lens plate disposed on the earner, and a light shielding structure mounted on said lens plate. The lens plate comprises a flat portion and a plurality of lenses covering the plurality of light sources. The light shielding structure comprises a plurality of reflective barriers, each comprising a base surface disposed on said flat portion, a top edge at a height above said base surface, and a first reflective sloping surface connecting the base surface and the top edge and facing one or more associated lenses of said plurality of lenses. The first reflective sloping surface is configured for reflecting light rays emitted through one or more associated first lenses of said plurality of lenses having a first incident angle with respect to an axis substantially perpendicular to the base surface between a first predetermined angle and 90°, with a first reflection angle with respect to said axis smaller than 60°. The first predetermined value is a value below 90°. In other words, when the first incident angle is between the first predetermined value and 90°, the first reflective sloping surface reflects the incident ray such that the reflected ray (or the main reflection direction of the reflected rays, defined as the direction of highest intensity in an event where the first reflective sloping surface is such that it reflects the incident ray in different directions, e.g. in case of surface with a certain roughness) has a reflection angle with respect to said axis smaller than 60°.

Embodiments of the invention are based inter alia on the insight that light emitting devices generally incorporate optical elements which are costly, of complex design, and can be the cause of delays in the fabrication line. To overcome the problem of manufacturing different types of optical elements according to different G/G* classifications a light emitting device must comply with, a light emitting device comprising a light shielding structure as defined above can be used, resulting in a cheaper solution whilst being able to achieve a high G/G* classification. Moreover, with the light emitting device as defined above, it is also possible to easily achieve various G/G* classifications with a given optical element, e.g. by varying the number and/or height of reflective barriers.

The first reflective sloping surface of each reflective barrier comprised in the light shielding structure is configured for reflecting light rays having a large incident angle with respect to an axis substantially perpendicular to the lens plate/base surface. Since the reflection angle with respect to said axis is smaller than 60°, the light shielding structure as defined above enables a reduction of the light intensities at large angles, thereby improving the G/G* classification of the light emitting device.

Preferred embodiments relate to a light shielding structure for use in an outdoor luminaire. By outdoor luminaire, its is meant luminaires which are installed on roads, tunnels, industrial plants, cycle paths, pedestrian paths or in pedestrian zones, for example, and which can be used notably for the lighting of roads and residential areas in the public domain, as well as the lighting of private parking areas and access roads to private building infrastructures.

In a preferred embodiment, the first predetermined angle is comprised between 60° and 85°, preferably between 70° and 80°. The first reflection angle is preferably comprised between 0° and 45°.

The above-mentioned range for the first predetermined angle enables the selection of large incident angles that correspond to glaring angles. Since the first reflective sloping surface is configured such that the first reflection angle is smaller than the first incident angle with respect to said axis, the light shielding structure enables to avoid that a backward incident light ray having a large incident angle with respect to said axis be reflected with a reflection angle substantially equal to the incident angle, thereby avoiding that a reflected light ray may have a glaring angle for a user.

In a preferred embodiment, the first reflective sloping surface comprises any one of a concave surface, a convex surface, a flat surface, or a combination thereof.

In this manner, the shape of the first reflective surface is not limited to a flat surface. The use of concave and/or convex shapes enables to achieve that the first reflection angle be smaller than the first incident angle with respect to said axis, thereby avoiding the above-mentioned undesired effect related to reflected backward incident light ray having a large angle. The use of a flat surface which is substantially not perpendicular to the flat portion of the lens plate enables to achieve the same result. Indeed, a flat surface substantially perpendicular to the flat portion of the lens plate would reflect backward incident light ray having a large incident angle with a reflection angle substantially equal to the incident angle, thereby creating a reflected ray having a glaring angle, causing discomfort for the user.

In a preferred embodiment, a surface roughness of the first reflective sloping surface corresponds to any one of a coarse surface finish, a polished surface finish, or a combination thereof. The surface roughness may be the same for the first reflective sloping surface of each reflective barrier, or may be different from one reflective barrier to another.

In a preferred embodiment, the plurality of lenses is a plurality of non-rotation symmetric lenses comprising a symmetry plane substantially perpendicular to the flat portion, and substantially parallel to the top edge of the plurality of reflective barriers. The symmetry plane may be a single symmetry plane.

In yet other embodiments, one or more other optical elements may be provided to the lens plate. For example, there may be associated a backlight element with some lenses or with each lens of the plurality of lenses. Those one or more other optical elements may be formed integrally with the lens plate.

A lens of the plurality of lenses may comprise a lens portion having an outer surface and an inner surface facing the associated light source. The outer surface may be a convex surface and the inner surface may be a concave surface. Also, a lens may comprise multiple lens portions adjoined in a discontinuous manner, wherein each lens portion may have a convex outer surface and a concave inner surface.

Hence, lenses that can be used in combination with the light shielding structure are not limited to rotation-symmetric lenses such as hemispherical lenses, or to ellipsoidal lenses having a major symmetry plane and a minor symmetry plane, although such rotation-symmetric lenses could be used. Alternatively, lenses with no symmetry plane or symmetry axis could be envisaged.

In an exemplary embodiment, also an edge of the base surface of the plurality of reflective barriers is substantially parallel to said symmetry plane.

In other words, the first reflective sloping surface faces one or more associated first lenses of said plurality of lenses, and is facing the symmetry plane of said one or more associated first lenses. In light emitting devices using free-form lenses, such as outdoor luminaires, the lens plate is disposed such that the symmetry plane of said lenses is substantially perpendicular to the motion direction of a road, tunnel, or path, in order to have substantially the same illumination distribution on both motion directions of the road, tunnel, or path. Hence, arranging the first reflective sloping surface substantially perpendicular to the motion direction of e.g. a road enables to cut off or reflect light rays having a large incident angle in the motion direction of said road, thereby improving the comfort of a user.

In a preferred embodiment, at least one reflective barrier of the plurality of reflective barriers further comprises a second reflective sloping surface opposite the first reflective sloping surface, configured for reflecting light rays emitted through one or more associated second lenses of said plurality of lenses adjacent to the one ore more first lenses associated with the first reflective sloping surface, having a second incident angle with respect to an axis substantially perpendicular to the base surface comprised between a second predetermined angle and 90°, with a second reflection angle with respect to said axis smaller than 60°.

In the same way the first reflective sloping surface of said plurality of reflective barriers is configured for reflecting light rays emitted through one or more associated first lenses of said plurality of lenses, the second reflective sloping surface of said plurality of reflective barriers is configured for reflecting light rays emitted through one or more associated second lenses of said plurality of lenses. The one or more second lenses are arranged adjacent to the one or more first lenses. This arrangement implies that the second reflective sloping surface is arranged opposite the first reflective sloping surface. The configuration of the second reflective sloping surface may be, but does not need to, the same as the one of the first reflecting sloping surface, in order to achieve the same result with respect to cutting off or reflecting light rays having a large incident angle, i.e., in order that light rays emitted through said one or more second lenses associated with the second reflective sloping surface, having a second incident angle with respect to an axis substantially perpendicular to the base surface comprised between a second predetermined angle and 90°, be reflected with a second reflection angle with respect to said axis smaller than 60°.

In an exemplary embodiment, an edge of the base surface delimiting the second reflective sloping surface is substantially parallel to a symmetry plane of the one or more associated second lenses.

In a preferred embodiment, the second reflective sloping surface comprises any one of a concave surface, a convex surface, a flat surface, or a combination thereof.

In a preferred embodiment, a surface roughness of the second reflective sloping surface corresponds to any one of a coarse surface finish, a polished surface finish, or a combination thereof. The surface roughness may be the same for the second reflective sloping surface of each reflective barrier, or may be different from one reflective barrier to another.

In a preferred embodiment, the first reflective sloping surface and the second reflective sloping surface of the al least one of the plurality of reflective barriers are symmetric with respect to a plane substantially perpendicular to the flat portion and at equal distance from the one or more first lenses and the one ore more second lenses.

A symmetric arrangement of the first and second reflective sloping surfaces with respect to said plane facilitates the design and manufacture of the plurality of reflective barriers. Together with the arrangement of the first and second reflective sloping surfaces at equal distance from the one or more first lenses and the one or more second lenses, this arrangement enables to achieve the same result with respect to cutting off or reflecting light rays having a large incident angle from both one or more first lenses and one ore more second lenses. The two above-mentioned arrangements enable to obtain homogeneous results between the first lenses and the second lenses.

In a preferred embodiment, the plurality of lenses is aligned into a plurality of rows and a plurality of columns to form a two-dimensional array. At least one reflective barrier of the plurality of reflective barriers is disposed between two adjacent columns. Similarly, in a preferred embodiment the plurality of reflective barriers is aligned into a plurality of rows or a plurality of columns.

A lens plate comprising a two-dimensional array formed by rows and columns of lenses is typically found in light emitting devices such as outdoor luminaires.

In an exemplary embodiment, said plurality of columns is formed along the symmetry plane.

This embodiment is in accordance with an embodiment wherein the top edge of the plurality of reflective barriers is substantially parallel to the symmetry plane of the plurality of lenses. The plurality of lenses is aligned into a plurality of columns along their symmetry plane.

In a preferred embodiment, the first reflective sloping surface of the at least one reflective barrier of the plurality of reflective barriers is facing one or more associated lenses of the plurality of lenses belonging to a first column of said plurality of columns. The second reflective sloping surface of the at least one reflective barrier of the plurality of reflective barriers is facing one or more associated lenses of the plurality of lenses belonging to a second column which is adjacent to said first column.

In a preferred embodiment, the light shielding structure further comprises a connecting means, preferably disposed on said flat portion, configured for connecting the plurality of reflective barriers.

In this manner, by connecting the plurality of reflective barriers the connecting means offers more rigidity to the light shielding structure. Moreover, the connecting means facilitates the mounting of the light shielding structure on the lens plate.

In an exemplary embodiment, the connecting means is disposed between two adjacent rows of said plurality of rows.

This embodiment is in accordance with an embodiment wherein at least one reflective barrier of the plurality of reflective barriers is disposed between two adjacent columns of said plurality of columns, thereby creating another two-dimensional array that cooperates with the two-dimensional array formed by the plurality of rows and columns of lenses.

In an exemplary embodiment, the height of the plurality of reflective barriers is substantially larger than a height of the connecting means.

Indeed, as the aim of the connecting means is to connect the plurality of reflective barriers, it does not require a minimal height, unlike the plurality of reflective barriers which have to reflect light rays having a large incident angle. Therefore, the height of the plurality of reflective barriers may be substantially larger than the height of the connecting means.

In an exemplary embodiment, the height of the plurality of reflective barriers is between 30% and 150% of a height of the plurality of lenses, preferably between 60% and 120%, most preferably between 70% and 110%. The height of the lens corresponds to the distance between a plane including the upper surface of the flat portion and the highest point of a lens. Preferably, the distance between two adjacent light sources is smaller than 60 mm, more preferably smaller than 50 mm, most preferably smaller than 40 mm. Typically the distance between two adjacent light sources will be larger than 20 mm. Preferably, the height of the plurality of reflective barriers is smaller than 10 mm, more preferably smaller than 8 mm, most preferably smaller than 7 mm, or even smaller than 6 mm.

This range of heights enables the plurality of reflective barriers to efficiently cut off or reflect light rays having a large incident angle, thereby enabling to efficiently adapt the G/G* classification of the light emitting device.

In an exemplary embodiment, the plurality of reflective barriers and the connecting means are integrally formed.

In this way, the design and the manufacture of the light shielding structure are facilitated, especially when the light shielding structure is molded. The rigidity and mechanical resistance of the entire structure are also improved. Moreover, the mounting of the light shielding structure on the lens plate is facilitated.

In an exemplary embodiment, a material of the light shielding structure comprises plastic, preferably a plastic with good reflective properties, e.g. a white plastic. The light shielding structure is optionally covered with reflective painting or with a reflective coating.

Plastic is a light, cheap, and easy to mold material. It also offers rigidity and mechanical resistance to the light shielding structure.

In a preferred embodiment, the light shielding structure is mounted on the lens plate by means of releasable fastening elements.

In this way, a coverage area of the flat portion of the lens plate that is covered by the light shielding structure can be modified in order to adapt the light intensities at large angles. A reduction of the light intensities at large angles can be realized by providing additional reflective barriers to the lens plate. Alternatively, it is possible to vary the height of one or more reflective barriers, or to vary both the number and the height of the reflective barriers in order to adapt the light intensities of the light emitting device at large angles.

In an exemplary embodiment, the releasable fastening elements comprise any one or more than the following elements: screws, locks, clamps, clips, or a combination thereof.

In an exemplary embodiment, the releasable fastening elements are located at intersections of the plurality of reflective barriers with the connecting means.

In this manner, the rigidity and the respective functionalities of both the reflective barriers and the connecting means are not altered significantly by the presence of the releasable fastening elements.

In a possible embodiment, one or more recesses, such as one or more holes and/or channels, may be arranged in the lens plate, into which the light shielding structure may be clipped or slid. To that end, the base surface of the light shielding structure may be provided with one or more protrusions, e.g. one or more pins and/or ribs, which fit in the one or more recesses. In addition or alternatively, one or more protrusions, such as pins or ribs, may be provided to the lens plate, said one or more protrusions being configured for cooperating with complementary features of the light shielding structure in order to secure the light shielding structure to the lens plate.

In yet another exemplary embodiment, the light shielding structure is integrally formed with the lens plate.

In a preferred embodiment, the lens plate is disposed on the carrier by screwing, locking, clamping, clipping, gluing, or a combination thereof.

Screwing, locking, clamping, clipping, and the like correspond to releasable fastening means, thereby enabling the maintenance or the replacement of the lens plate and/or of the carrier.

It is noted that the same fastening means may fasten the light shielding structure to the lens plate and the lens plate to the carrier, e.g. a screw passing through the light shielding structure and through the lens plate and being screwed in the carrier.

In a preferred embodiment, the plurality of light sources comprises light emitting diodes (LEDs).

LEDs have numerous advantages such as long service life, small volume, high shock resistance, low heat output, and low power consumption.

In an exemplary embodiment, the plurality of lenses comprises free-form lenses.

The term free-form typically refers to non-rotational symmetric lenses.

According to a second aspect of the invention, there is provided a light shielding structure for use in a light emitting device according to the first aspect of the invention, said light shielding structure comprising a plurality of reflective barriers, each comprising a base surface, a top edge at a height above said base surface, and a first reflective sloping surface connecting the base surface and the top edge. The first reflective sloping surface is configured for reflecting light rays emitted at a first incident angle with respect to an axis substantially perpendicular to the base surface comprised between a first predetermined angle and 90°, with a first reflection angle with respect to said axis smaller than 60°.

Preferred features of the light shielding structure disclosed above in connection with the light emitting device may also be used in embodiments of the light shielding structure of the invention.

BRIEF DESCRIPTION OF THE FIGURES

This and other aspects of the present invention will now be described in more detail, with reference to the appended drawings showing a currently preferred embodiment of the invention. Like numbers refer to like features throughout the drawings.

Figures 1A-1C respectively show a perspective view of an exemplary embodiment of a light emitting device, an enlarged perspective view thereof, and an enlarged longitudinal view thereof;

Figures 2A-2C respectively show a perspective view of an exemplary embodiment of a light shielding module for use in a light emitting device, a longitudinal view thereof, and a top view thereof;

Figures 3A-3F schematically illustrate six exemplary embodiments corresponding to six exemplary shapes of a reflective sloping surface of a light shielding structure for use in a light emitting device;

Figure 4 illustrates a polar diagram of the light distribution according to different embodiments of a light shielding structure for use in a light emitting device;

Figure 5 illustrates schematically the incident and reflected light rays in another exemplary embodiment;

Figure 6 shows an enlarged perspective view of another exemplary embodiment of a light emitting device.

DESCRIPTION OF EMBODIMENTS

Figures 1A-1C respectively show a perspective view of an exemplary embodiment of a light emitting device, an enlarged perspective view thereof, and an enlarged longitudinal view thereof.

As illustrated in the embodiments of Figures 1A-1C, the light emitting device 1 comprises a carrier 10, a plurality of light sources disposed on the carrier 10, a lens plate 100 disposed on the carrier 10, and a light shielding structure 200 mounted on said lens plate 100. The lens plate 100 comprises a flat portion 110 and a plurality of lenses 120 covering the plurality of light sources (not shown, but located underneath lenses 120 in a way known to a person skilled in the art). The light shielding structure 200 comprises a plurality of reflective banners 210, each comprising a base surface 211 disposed on said flat portion 110, a top edge 212 at a height H above said base surface 211, and a first reflective sloping surface 213a connecting the base surface 211 and the top edge 212 and facing one or more associated lenses of said plurality of lenses 120. The plurality of lenses 120 may be non-rotational symmetric lenses 120 comprising a symmetry plane Pl substantially perpendicular to the flat portion 110, and substantially parallel to the top edge 212 of the plurality of reflective barriers 210. Also an edge of the base surface 211 of the plurality of reflective barriers 210 may be substantially parallel to said symmetry plane Pl. The lens plate 100 may be disposed on the carrier 10 by screwing, locking, clamping, clipping, or a combination thereof. The plurality of light sources may comprise light emitting diodes (LEDs). The height H of the plurality of reflective barriers 210 may be between 30% and 150% of a height H” of the plurality of lenses 120, preferably between 60% and 120%, most preferably between 70% and 110%. The height H” of a lens 120 corresponds to the distance between a plane including the upper surface 111 of the flat portion 110 and the highest point of a lens 120. Preferably, the distance DL between two adjacent light sources is smaller than 60 nun, more preferably smaller than 50 mm, most preferably smaller than 40 nun. Typically the distance between two adjacent light sources will be larger than 20 mm. Preferably, the height of the plurality of reflective barriers is smaller than 10 mm, more preferably smaller than 8 mm, most preferably smaller than 7 mm, or even smaller than 6 mm.

As illustrated in the embodiment of Figure 1C, said first reflective sloping surface 213a is configured for reflecting light rays emitted through one or more associated first lenses of said plurality of lenses 120 having an incident angle al with respect to an axis A; A’, A” substantially perpendicular to the base surface 211 comprised between a first predetermined angle ap and 90°, with a reflection angle βΐ with respect to axis A; A’, A” smaller than 60°. In other words:

Val e [ap, 90°]: βΐ <60°.

It is noted that Figure 1C is a simplified schematic drawing, and that the direction of the light ray has been simplified in the sense that the refraction by the lens 120 is not drawn. The incident angle al is the angle of a light ray between the lens 120 and the reflective barrier 210, i.e. a direction of a light ray after it has exited the lens 120. The predetermined angle may be comprised between 60° and 85°, preferably between 70° and 80°. The reflection angle βΐ may be comprised between 0° and 45°. At least one reflective barrier of the plurality of reflective barriers 210 may further comprise a second reflective sloping surface 213b opposite the first reflective sloping surface 213a. The second reflective sloping surface 213b may be configured for reflecting light rays emitted through one or more associated second lenses of said plurality of lenses 120 adjacent to the one ore more first lenses associated with the first reflective sloping surface 213a, having a second incident angle a2 with respect to an axis A; A’, A” substantially perpendicular to the base surface 211 comprised between a second predetermined angle and 90°, with a second reflection angle β2 with respect to said axis A; A’, A” smaller than 60°. The second predetermined angle may be comprised between 60° and 85°, preferably between 70° and 80°. The second reflection angle β2 may be comprised between 0° and 45°.

As illustrated in the embodiment of Figure 1A, the light emitting device 1 comprises 24 light sources disposed on the carrier 10. Accordingly, the lens plate 100 comprises 24 lenses 120, each lens covering one light source. It is noted that instead of providing one lens plate 100 with twenty four lenses, it is also possible to provide a plurality of lens plates with less lenses, e.g. six lens plates with each four lenses. Each light source may comprise several LEDs. The 24 lenses 120 are aligned into 6 rows R and 4 columns C (6 x 4) to form a two-dimensional array. However, it should be clear for the skilled person that the number of light sources and/or the number of lenses may vary in other embodiments. It should also be clear for the skilled person that other arrangements of lenses may be envisaged in other embodiments. In a first exemplary embodiment, the lens plate may comprise 4 lenses 120 aligned into 2 rows R and 2 columns C (2 x 2). In a second exemplary embodiment, the lens plate may comprise 6 lenses 120 aligned into 2 rows R and 3 columns C (2 x 3), or 3 rows R and 2 columns C (3 x 2). In yet a third exemplary embodiment, the lens plate may comprise 9 lenses 120 aligned into 3 rows R and 3 columns C (3 x 3). Many other embodiments may be envisaged, such as (2 x 4), (3 x 4) arrangements of lenses, etc.

As illustrated in the embodiment of Figure 1A, the light shielding structure 200 comprises three light shielding modules 200a, 200b, 200c. Each light shielding module 200a, 200b, 200c comprises ten interconnected reflective barriers 210. Among these ten reflective barriers, six reflective barriers further comprise a second reflective sloping surface 213b opposite the first reflective sloping surface 213a. The four remaining reflective barriers 210 only comprise a first reflective sloping surface 213a, and are located at opposite ends of the flat portion 110 of the lens plate 100. However, it should be clear for the skilled person that the number of reflective barriers 210 of a light shielding module 200a, 200b, 200c, and the number of light shielding modules 200a, 200b, 200c may vary in other embodiments. In a first exemplary embodiment, only one reflective barrier 210 may be present, resulting in a first glare reduction compared to a situation wherein the light emitting device 1 does not comprise any light shielding structure 200. In a second exemplary embodiment, one light shielding module may be present, resulting in a further glare reduction. In a third exemplary embodiment, two light shielding modules may be present, resulting in an even further glare reduction. In the embodiment illustrated in Figure 1A, three light shielding modules are present, resulting in a highest glare reduction. Note that the above-mentioned different glare reductions may correspond to different G/G* classifications.

In the embodiment of Figure 1 A, 18 of the 30 reflective barriers 210 are disposed between adjacent columns C of lenses 120; 6 reflective barriers between the first column and the second column, 6 reflective barriers between the second column and the third column, and 6 reflective barriers between the third column and the fourth column. The first reflective sloping surface 213a and the second reflective sloping surface 213b of 18 of the 30 reflective barriers 210 may be symmetric with respect to a plane P substantially perpendicular to the flat portion 110 and at equal distance from the one ore more first lenses and the one or more second lenses. In other embodiments, these reflective barriers may be asymmetric with respect to said plane P. In other embodiments, at least one of the 30 reflective barriers 210 may be disposed between two adjacent columns C. More generally, in exemplary embodiments reflective barriers 210 may be provided between some pairs of adjacent columns C, or between all pairs. Moreover, the reflective barriers 210 may be provided along an entire column C, or along only a portion of a column C.

As illustrated in the embodiment of Figure 1A, the 24 lenses 120 are 24 non-rotational symmetric lenses 120 comprising a symmetry plane Pl substantially perpendicular to the flat portion 110, and substantially parallel to the top edge 212 of the 30 reflective barriers 210. Also an edge of the base surface 211 of the 30 reflective barriers 210 is substantially parallel to said symmetry plane PI. An edge of the base surface 211 delimiting the second reflective sloping surface 213b of 18 of the 30 reflective barriers 210 is substantially parallel to said symmetry plane Pl. However, it should be clear for the skilled person that in other embodiments at least one lens may be a rotation-symmetric lens, such as a hemispherical lens or an ellipsoidal lens having a major symmetry plane and a minor symmetry plane. In another embodiment, at least one lens may have no symmetry. In yet another embodiment at least one lens may be a free-form lens.

In the embodiment of Figure 1A, the 4 columns C are formed along the symmetry plane Pl. The first reflective sloping surface 213a of the 30 reflective barriers 210 is facing one associated lens of the 24 lenses 120 belonging to one column of said 4 columns C. The second reflective sloping surface 213b of 18 of the 30 reflective barriers 210 is facing one associated lens of the 24 lenses 120 belonging to the first column or to the fourth column. However, it should be clear for the skilled person that in other embodiments the first reflective sloping surface 213a of the at least one reflective barrier of the plurality of reflective barriers 210 may be facing one or more associated lenses of the plurality of lenses 120 belonging to one column of said plurality of columns C. It should be also clear for the skilled person that in other embodiments the second reflective sloping surface 213b of the at least one reflective barrier of the plurality of reflective banners 210 may be facing one or more associated lenses of the plurality of lenses 120 belonging to a column which is adjacent to said column.

As illustrated in the embodiment of Figure 1A, each light shielding module 200a, 200b, 200C further comprises a connecting means 220, preferably disposed on said flat portion 110, between two adjacent rows of the 6 rows R. The connecting means 220 is composed of four connecting portions 221, each connecting portion 211 being configured to connect two reflective barriers 210 arranged at one side of two associated lenses to two other reflective barriers 210 arranged at the other side of said two associated lenses. However, it should be clear for the skilled person that in other embodiments the connecting means 220 may be composed of more or less than four connecting portions 221, depending on the amount of reflective barriers 210 comprised in the light shielding module 200. More generally, a light shielding structure may comprise any number of light shielding modules, and each light shielding module may comprises any number of interconnected reflective harriers.

In the embodiment illustrated in Figure 6, the light emitting device 1 comprises a carrier 10, a plurality of light sources (not shown) disposed on the carrier 10, a lens plate 100 disposed on the carrier 10, and a light shielding structure 200 mounted on said lens plate 100. The lens plate 100 comprises a flat portion 110 and a plurality of lenses 120 covering the plurality of light sources. As in Figures 1A-1C, the plurality of lenses 120 may he non-rotational symmetric lenses comprising a symmetry plane Pl. The light shielding structure 200 comprises the same features as described in Figures 1A-1C. Alternatively or additionally to lenses 120, the lens plate 100 may comprise other optical elements. As illustrated in Figure 6, the lens plate 100 further comprises a plurality of backlight elements 130. A backlight element of the plurality of backlight elements 130 is associated with each lens of the plurality of lenses 120, and is arranged substantially perpendicular to the symmetry plane Pl. In other embodiments, backlight elements 130 may be associated with only a subset of the plurality of lenses 120. Those one or more other optical elements, such as backlight elements 130, may he formed integrally with the lens plate.

As shown in Figure 1C, a lens 120 of the plurality of lenses 120 may comprise a lens portion having an outer surface and an inner surface facing the associated light source. The outer surface may be a convex surface and the inner surface may be a concave surface. In other non-illustrated variants, a lens may comprise multiple lens portions adjoined in a discontinuous manner, wherein each lens portion may have a convex outer surface and a concave inner surface.

Figures 2A-2C respectively show a perspective view of an exemplary embodiment of a light shielding module for use in a light emitting device, a longitudinal view thereof, and a top view thereof.

As illustrated in the embodiments of Figures 2A-2C, the light shielding module 200a for use in a light emitting device (not shown) comprises a plurality of reflective barriers 210, each comprising a base surface 211, a top edge 212 at a height H above said base surface 211, and a first reflective sloping surface 213a connecting the base surface 211 and the top edge 212 and facing one or more associated lenses of said plurality of lenses (not shown). Said first reflective sloping surface 213a is configured for reflecting light rays emitted through one or more associated first lenses of said plurality of lenses having a first incident angle with respect to an axis (not shown, see Figure 1C) substantially perpendicular to the base surface 211 comprised between a first predetermined angle and 90°, with a first reflection angle with respect to said axis smaller than 60°. The first predetermined angle may be comprised between 60° and 85°, preferably between 70° and 80°. The first reflection angle may be comprised between 0° and 45°. At least one reflective barrier of the plurality of reflective barriers 210 may further comprise a second reflective sloping surface 213b opposite the first reflective sloping surface 213a. The second reflective sloping surface 213b may be configured for reflecting light rays emitted through one or more associated second lenses of said plurality of lenses (not shown) adjacent to the one ore more first lenses associated with the first reflective sloping surface 213a, having a second incident angle with respect to an axis (not shown, see Figure 1C) substantially perpendicular to the base surface 211 comprised between a second predetermined angle and 90°, with a second reflection angle with respect to said axis smaller than 60°. The second predetermined angle may be comprised between 60° and 85°, preferably between 70° and 80°. The second reflection angle may be comprised between 0° and 45°.

In the embodiments illustrated in Figures 2A and 2C, the light shielding module 200a comprises 10 reflective barriers reflective barriers reflective barriers

210. However, it should be clear for the skilled person that the number of

210 may vary in other embodiments. Among these 10 reflective barriers, 6 further comprise a second reflective sloping surface 213b opposite the first reflective sloping surface 213a. The first reflective sloping surface 213a and the second reflective sloping surface 213b of 6 of the 10 reflective barriers 210 may be symmetric with respect to a plane P. In other embodiments, these reflective surfaces 213a, 213b may be asymmetric with respect to said plane P.

As illustrated in the embodiments of Figures 2A-2C, the light shielding module 200a further comprises a connecting means 22O.The connecting means 220 is composed of 4 connecting portions 221, each connecting portion being configured to connect two reflective barriers 210 to two adjacent reflective barriers 210. However, it should be clear for the skilled person that in other embodiments the connecting means 220 may be composed of more or less than 4 connecting portions 221, depending on the amount of reflective barriers 210 comprised in the light shielding module 200a.

The material of the light shielding structure 200 may comprise plastic. Preferably, the plastic used for manufacturing the light shielding structure 200 is a white and opaque plastic, but plastic of a different color and/or partially translucent plastic may be envisaged. The light shielding structure 200 may also comprise other materials than plastic. The light shielding structure 200 may be covered with white painting or with painting of a different color, or with a reflective coating. In an embodiment, a surface roughness of the first reflective sloping surface 213a may correspond to any one of a coarse surface finish, a polished surface finish, or a combination thereof. The surface roughness may be the same for the first reflective sloping surface 213a of each reflective barrier 210, or may be different from one reflective barrier 210 to another. Similarly, a surface roughness of the second reflective sloping surface 213b may correspond to any one of a coarse surface finish, a polished surface finish, or a combination thereof. The surface roughness may be the same for the second reflective sloping surface 213b of each reflective barrier 210, or may be different from one reflective barrier 210 to another. In different embodiments, the first reflective sloping surface 213a and the second reflective sloping surface 213b may present a different surface roughness.

Figure 5 illustrates schematically the incident and reflected light rays in another exemplary embodiment.

In the embodiment illustrated in Figure 5, the first reflective sloping surface 213a is configured to reflect an incident light ray R1 exiting a lens 120 arranged over a light source 300, as a light beam with multiple reflected light rays R2, R2’, etc. The main reflection direction of the reflected light rays R2, R2’, etc., defined as the direction of highest intensity, is represented by the light ray Rt in Figure 5. The light ray R1 has an incident angle al with respect to an axis A, A’ substantially perpendicular to the flat portion 110 of the lens plate 100. The first reflective sloping surface 213a is configured such that for angles al between a first predetermined angle and 90°, the light ray Rt has a reflection angle βΐ with respect to said axis A, A’ smaller than 60°. The first predetermined angle, and the other angles may have the same values as defined above.

In the embodiments illustrated in Figures 2A-2C, the plurality of reflective barriers 210 and the connecting means 220 are integrally formed. In other embodiments, the plurality of reflective barriers 210 may be formed in one ore more first pieces, and the connecting means 220 may be formed in one ore more second pieces independently from the one ore more first pieces. The light shielding structure 200 may be mounted on the lens plate (not shown) by means of releasable fastening elements. Said releasable fastening elements may comprise any one or more than the following elements: screws, locks, clamps, clips, or a combination thereof. The releasable fastening elements may be located at intersections I of the plurality of reflective barriers 210 with the connecting means 220. It should be noted that the height H of the plurality of reflective barriers 210 may be substantially larger than a height H’ of the connecting means 220. In another embodiment, a hole or channel may be arranged in the lens plate, into which the light shielding structure 200 may be clipped or slid. In yet another embodiment, the light shielding structure 200 may be integrally formed with the lens plate.

Figures 3A-3F schematically illustrate six exemplary embodiments corresponding to six exemplary shapes of a reflective sloping surface of a light shielding structure for use in a light emitting device.

As illustrated in the embodiments of Figures 3A-3F, the first reflective sloping surface 213a may comprise any one of a concave surface, a convex surface, a flat surface, or a combination thereof. Similarly, the second reflective sloping surface 213b comprises any one of a concave surface, a convex surface, a flat surface, or a combination thereof. The surfaces comprised in the first reflective sloping surface 213a and in the second reflective sloping surface 213b are configured for reflecting light rays emitted through one or more associated first lenses of said plurality of lenses having an incident angle with respect to an axis substantially perpendicular to the lens plate/base surface comprised between a first or second predetermined angle and 90°, with a first or second reflection angle with respect to said axis smaller than 60°. The first or second predetermined angle may be comprised between 60° and 85°, preferably between 70° and 80°. The first or second reflection angle may be comprised between 0° and 45°.

Figures 3A-3C respectively display a first reflective sloping surface 213a and a second reflective sloping surface 213b having a concave surface, a convex surface, and a flat surface. The flat surface may be inclined, i.e., substantially not perpendicular to the flat portion of the lens plate (not shown), in order to avoid reflecting backward incident light ray having a large incident angle with a reflection angle substantially equal to the incident angle.

Figures 3D-3F respectively display a first reflective sloping surface 213a having a concave surface, a convex surface, and a flat surface, and a second reflective sloping surface 213b having a convex surface, a flat surface, and a concave surface. Similarly, the flat surface may be inclined.

It should be clear for the skilled person that embodiments illustrating other combinations of surfaces comprised in the first reflective sloping surface 213a and in the second reflective sloping surface 213b may be envisaged. In an exemplary embodiment, the first reflective sloping surface 213a and/or the second reflective sloping surface 213b may comprise a combination of a concave surface and a convex surface, or a combination of a convex surface and a flat surface, or a combination of a flat surface and a concave surface.

The first reflective sloping surface 213a and/or the second reflective sloping surface 213b may be covered with white painting or with painting of a different color, or with a reflective coating. In an embodiment, a surface roughness of the first reflective sloping surface 213a may correspond to any one of a coarse surface finish, a polished surface finish, or a combination thereof. Similarly, a surface roughness of the second reflective sloping surface 213b may correspond to any one of a coarse surface finish, a polished surface finish, or a combination thereof.

Figure 4 illustrates a polar diagram of the light distribution according to different embodiments of a light shielding structure for use in a light emitting device.

Four embodiments of light distribution are considered in relation with Figure 4, wherein the number of reflective barriers 210 comprised in the light shielding structure 200 varies from one embodiment to another. In the first embodiment, no reflective barrier 210 is present. In the second embodiment, 10 reflective barriers 210 are present. In the third embodiment, 20 reflective barriers 210 are present. In the fourth embodiment, which corresponds to the embodiment illustrated in Figure 1 A, 30 reflective barriers 210 are present.

The resulting change in light distribution from one embodiment to another is illustrated in Figure 4. On the polar diagram, DI, D2, D3, and D4 respectively show the light distribution at 90°-270°, i.e., in the symmetry plane Pl of Figures 1A-1B in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment. DI ’, D2’, D3’, and D4’ respectively show the light distribution at 0°-180°, i.e., in a plane perpendicular to the lens plate 100 and to the symmetry plane Pl of Figures 1A-1B in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment.

It can be clearly seen that the shape of the light beam is changed from one embodiment to another. The directions El, E2, E3, and E4 respectively correspond to a maximum of the light distribution at 90°-270° in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment. The directions ΕΓ, E2’, E3’, and E4’ respectively correspond to a maximum of the light distribution at 0°-180° in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment. In both 90°-270° and 0°-180° light distribution cases, it is observed that the maximal light intensity decreases from the first embodiment to the fourth embodiment. It is also observed that the angle corresponding to said maximum also decreases from the first embodiment to the fourth embodiment. Finally, it is observed that the light intensity at large angles that may correspond to glaring angles also decreases from the first embodiment to the fourth embodiment.

Hence, by varying the number of reflective barriers 210 comprised in the light shielding structure 200 as illustrated in Figure 4, the shape of the light beam can be changed and adapted in function of the G/G* classification that needs to be obtained. For example, the first embodiment may correspond to a G3/G*3 classification, whereas the second, third, and fourth embodiments may correspond to a G4/G*4 classification.

Whilst the principles of the invention have been set out above in connection with specific embodiments, it is to be understood that this description is merely made by way of example and not as a limitation of the scope of protection which is determined by the appended claims.

Claims

ConclusiesConclusions

1. Een licht uitstralende inrichting (1) omvattende:A light-emitting device (1) comprising:

een drager (10);a carrier (10);

meerdere lichtbronnen aangebracht op de drager (10);a plurality of light sources disposed on the carrier (10);

een lensplaat (100) aangebracht op de drager (10), omvattende een vlak deel (110) en meerdere lenzen (120) die zich uitstrekken over de meerdere lichtbronnen; en een licht afschermende structuur (200) gemonteerd op de lensplaat (100), omvattende meerdere reflectieve barrières (210), elk omvattende een basisoppervlak (211) dat aangebracht is op het vlak deel (110), een bovenste rand (212) op een hoogte (H) boven het basisoppervlak (211) en een eerste reflectief hellend oppervlak (213a) dat het basisoppervlak (211) en de bovenste rand (212) verbindt, en dat tegenover één of meer geassocieerde lenzen van de meerdere lenzen gelegen is;a lens plate (100) mounted on the carrier (10), comprising a flat portion (110) and a plurality of lenses (120) extending over the multiple light sources; and a light-shielding structure (200) mounted on the lens plate (100), comprising a plurality of reflective barriers (210), each comprising a base surface (211) mounted on the flat portion (110), an upper rim (212) on a height (H) above the base surface (211) and a first reflective inclined surface (213a) connecting the base surface (211) and the top edge (212), which is opposite one or more associated lenses of the multiple lenses;

waarbij het eerste reflectief hellend oppervlak (213a) is ingericht voor het reflecteren van lichtstralen die doorheen één of meerdere geassocieerde eerste lenzen van de meerdere lenzen (120) lopen en die een eerste invalshoek al ten opzichte van een as (A, A’, A”) die in hoofdzaak loodrecht is op het basisoppervlak (211), tussen een eerste vooraf bepaalde hoek en 90° hebben, met een eerste reflectiehoek βΐ ten opzichte van de as (A, A’, A”) die kleiner is dan 60°.the first reflective inclined surface (213a) being arranged to reflect light rays passing through one or more associated first lenses of the plurality of lenses (120) and having a first angle of incidence already with respect to an axis (A, A ', A ") Which is substantially perpendicular to the base surface (211), between a first predetermined angle and 90 °, with a first reflection angle βΐ with respect to the axis (A, A ', A") less than 60 ° .

2. De licht uitstralende inrichting volgens conclusie 1, waarbij de eerste vooraf bepaalde hoek gelegen is tussen 60° en 85°, bij voorkeur tussen 70° en 80°; waarbij de eerste reflectiehoek βΐ gelegen is tussen 0° en 45°.The light-emitting device according to claim 1, wherein the first predetermined angle is between 60 ° and 85 °, preferably between 70 ° and 80 °; the first reflection angle βΐ being between 0 ° and 45 °.

3. De licht uitstralende inrichting volgens conclusies 1 of 2, waarbij het eerste reflectief hellend oppervlak (213a) ten minste één van een concaaf oppervlak, een convex oppervlak, een vlak oppervlak, of een combinatie daarvan omvat; en/of waarbij een oppervlakteruwheid van het eerste reflectief hellend oppervlak (213a) overeenkomt aan één van een ruwe oppervlakteafwerking, een gepolijste oppervlakteafwerking, of een combinatie daarvan.The light emitting device according to claim 1 or 2, wherein the first reflective inclined surface (213a) comprises at least one of a concave surface, a convex surface, a flat surface, or a combination thereof; and / or wherein a surface roughness of the first reflective inclined surface (213a) corresponds to one of a rough surface finish, a polished surface finish, or a combination thereof.

4. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de meerdere lenzen (120) meerdere niet-rotatie-symmetrische lenzen (120) zijn, omvattende een symmetrievlak (PI) dat in hoofdzaak loodrecht op het vlak deel (110), en in hoofdzaak parallel aan de bovenste rand (212) is van de meerdere reflectieve barrières (210).The light emitting device according to any one of the preceding claims, wherein the plurality of lenses (120) are a plurality of non-rotationally symmetrical lenses (120), comprising a plane of symmetry (PI) substantially perpendicular to the plane portion (110), and is substantially parallel to the top edge (212) of the plurality of reflective barriers (210).

5. De licht uitstralende inrichting volgens conclusie 4, waarbij een rand van het basisoppervlak (211) van de meerdere reflectieve barrières (210) in hoofdzaak parallel is aan het symmetrievlak (PI).The light emitting device according to claim 4, wherein an edge of the base surface (211) of the plurality of reflective barriers (210) is substantially parallel to the plane of symmetry (PI).

6. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij teuminste één reflectieve barrière van de meerdere reflectieve barrières (210) verder een tweede reflectief hellend oppervlak (213b) tegenover het eerste reflectief hellend oppervlak (213a) omvat, dat ingericht is om lichtstralen die doorheen één of meer geassocieerde lenzen van de meerdere lenzen (120) aangrenzend aan de één of meer eerste lenzen geassocieerd met het eerste reflectief hellend oppervlak (213a) lopen en die een tweede invalshoek a2 ten opzichte van een as (Α,Α’,Α”) die in hoofdzaak loodrecht is op het basisoppervlak (211) tussen een eerste vooraf bepaalde hoek en 90° hebben, met een tweede reflectiehoek β2 ten opzichte van de as (Α,Α’,Α”) die kleiner is dan 60°.The light emitting device according to any one of the preceding claims, wherein at least one reflective barrier of the plurality of reflective barriers (210) further comprises a second reflective inclined surface (213b) opposite the first reflective inclined surface (213a) adapted to light rays passing through one or more associated lenses of the plurality of lenses (120) adjacent to the one or more first lenses associated with the first reflective inclined surface (213a) and having a second angle of attack α2 with respect to an axis (Α, Α ', Α ”) that is substantially perpendicular to the base surface (211) between a first predetermined angle and 90 °, with a second reflection angle β2 from the axis (Α, Α ', Α”) less than 60 ° .

7. De licht uitstralende inrichting volgens conclusies 5 en 6, waarbij een rand van het basisoppervlak (211) die het tweede reflectief hellend oppervlak (213b) begrenst in hoofdzaak parallel is aan het symmetrievlak (PI).The light emitting device according to claims 5 and 6, wherein an edge of the base surface (211) defining the second reflective inclined surface (213b) is substantially parallel to the plane of symmetry (PI).

8. De licht uitstralende inrichting volgens conclusies 6 of 7, waarbij het tweede reflectief hellend oppervlak (213) één van een concaaf oppervlak, een convex oppervlak, een vlak oppervlak, of een combinatie daarvan omvat; en/of waarbij een oppervlakteruwheid van het tweede reflectief hellend oppervlak (213b) overeenkomt met één van een ruwe oppervlakteafwerking, een gepolijste vlakteafwerking, of een combinatie daarvan.The light emitting device according to claim 6 or 7, wherein the second reflective inclined surface (213) comprises one of a concave surface, a convex surface, a flat surface, or a combination thereof; and / or wherein a surface roughness of the second reflective inclined surface (213b) corresponds to one of a rough surface finish, a polished surface finish, or a combination thereof.

9. De licht uitstralende inrichting volgens één van de conclusies 6-8, waarbij het eerste reflectief hellend oppervlak (213a) en het tweede reflectief hellend oppervlak (213b) van de ten minste één van de meerdere reflectieve barrières (210) symmetrisch zijn ten opzichte van een vlak (P) dat in hoofdzaak loodrecht gericht is op het vlak deel (110) en op een gelijke afstand van de één of meer eerste lenzen en de één of meer tweede lenzen gelegen is.The light emitting device according to any one of claims 6-8, wherein the first reflective inclined surface (213a) and the second reflective inclined surface (213b) of the at least one of the plurality of reflective barriers (210) are symmetrical with respect to of a plane (P) which is oriented substantially perpendicular to the flat part (110) and is equidistant from the one or more first lenses and the one or more second lenses.

10. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de meerdere lenzen (120) uitgelijnd zijn in meerdere rijen (R) en meerdere kolommen (C) voor het vormen van een tweedimensionale array; waarbij ten minste één reflectieve barrière van de meerdere reflectieve barrières (210) aangebracht is tussen twee aangrenzende kolommen (C).The light emitting device according to any preceding claim, wherein the plurality of lenses (120) are aligned in multiple rows (R) and multiple columns (C) to form a two-dimensional array; wherein at least one reflective barrier of the plurality of reflective barriers (210) is disposed between two adjacent columns (C).

11. De licht uitstralende inrichting volgens één der conclusies 4 en 10, waarbij de meerdere kolommen (C) gevormd zijn langs het symmetrievlak (PI).The light-emitting device according to any one of claims 4 and 10, wherein the plurality of columns (C) are formed along the plane of symmetry (PI).

12. De licht uitstralende inrichting volgens de conclusies 6 en 10, waarbij het eerste reflectief hellend oppervlak (213a) van de ten minste één reflectieve barrière van de meerdere reflectieve barrières (210) tegenover één of meer geassocieerde lenzen van de meerdere lenzen (120) die toebehoren aan één kolom van de meerdere kolommen (C), gelegen is; en waarbij het tweede reflectief hellend oppervlak (213b) van de ten minste één reflectieve barrière van de meerdere reflectieve barrières (210) tegenover één of meer geassocieerde lenzen van de meerdere lenzen (120) die toehehoren aan een naast deze kolom gelegen kolom, gelegen is.The light emitting device according to claims 6 and 10, wherein the first reflective inclined surface (213a) of the at least one reflective barrier of the plurality of reflective barriers (210) opposite one or more associated lenses of the plurality of lenses (120) which belong to one column of the multiple columns (C); and wherein the second reflective inclined surface (213b) of the at least one reflective barrier of the plurality of reflective barriers (210) is opposed to one or more associated lenses of the plurality of lenses (120) associated with a column adjacent to this column .

13. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de licht afschermende structuur (200) verder een verbindingsmiddel (220) omvat dat ingericht is om de meerdere reflectieve barrières (210) te verbinden.The light-emitting device according to any of the preceding claims, wherein the light-shielding structure (200) further comprises a connector (220) adapted to connect the plurality of reflective barriers (210).

14. De licht uitstralende inrichting volgens de conclusies 10 en 13, waarbij het verbindingsmiddel (220) aangebracht is tussen twee aangrenzende rijen van de meerdere rijen (R).The light emitting device according to claims 10 and 13, wherein the connecting means (220) is arranged between two adjacent rows of the plural rows (R).

15. De licht uitstralende inrichting volgens de conclusie 13 of 14, waarbij de hoogte (H) van de meerdere reflectieve barrières (210) in hoofdzaak groter is dan een hoogte (H’) van de verbindingsmiddelen (220).The light-emitting device according to claim 13 or 14, wherein the height (H) of the plurality of reflective barriers (210) is substantially greater than a height (H ') of the connecting means (220).

16. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de hoogte (H) van de meerdere reflectieve barrières (210) tussen 30% en 150% van een hoogte (H”) van de meerdere lenzen (120) is.The light emitting device according to any preceding claim, wherein the height (H) of the plurality of reflective barriers (210) is between 30% and 150% of a height (H ”) of the plurality of lenses (120).

17. De licht uitstralende inrichting volgens één der conclusies 13-16, waarbij de meerdere reflectieve barrières (210) en het verbindingsmiddel (220) integraal gevormd zijn.The light-emitting device according to any one of claims 13-16, wherein the plurality of reflective barriers (210) and the connector (220) are integrally formed.

18. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij een materiaal van de licht afschermende structuur (200) kunststof omvat.The light-emitting device according to any of the preceding claims, wherein a material of the light-shielding structure (200) comprises plastic.

19. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de licht afschermende structuur (200) gemonteerd is op de lensplaat (100) door middel van losmaakbare bevestigingselementen.The light-emitting device according to any of the preceding claims, wherein the light-shielding structure (200) is mounted on the lens plate (100) by releasable fasteners.

20. De licht uitstralende inrichting volgens conclusie 19, waarbij de losmaakbare bevestigingselementen één of meerdere van de volgende elementen omvat: schroeven, vergrendelelementen, klemmen, clips of een combinatie daarvan.The light-emitting device according to claim 19, wherein the releasable fastening elements comprise one or more of the following elements: screws, locking elements, clamps, clips or a combination thereof.

21. De licht uitstralende inrichting volgens de conclusie 19 of 20, waarbij de losmaakbare bevestigingselementen gelegen zijn bij intersecties (I) van de meerdere reflectieve barrières (210) met het verbindingsmiddel (220).The light-emitting device according to claim 19 or 20, wherein the releasable fasteners are located at intersections (I) of the plurality of reflective barriers (210) with the connector (220).

22. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de lensplaat (100) aangebracht is op de drager (10) door schroeven, vergrendelen, klemmen, clipping, lijmen of een combinatie daarvan.The light emitting device according to any one of the preceding claims, wherein the lens plate (100) is mounted on the carrier (10) by screwing, locking, clamping, clipping, gluing or a combination thereof.

55

23. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de meerdere lichtbronnen lichtdiodes (LED) omvatten.The light-emitting device according to any one of the preceding claims, wherein the multiple light sources comprise light-emitting diodes (LED).

24. De licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de meerdere lenzen (120) vrije-vorm (free-form) lenzen omvatten.The light emitting device according to any of the preceding claims, wherein the plurality of lenses (120) comprise free-form lenses.

25. Een licht afschermende structuur (200) voor gebruik in een licht uitstralende inrichting volgens één der voorgaande conclusies, waarbij de licht afschermende structuur (200) meerdere reflectieve barrières (210) omvat, elk omvattende een basisoppervlak (211), een bovenste rand (212) op een hoogte (H) boven het basisoppervlak (211), en een eerste reflectief hellend oppervlakA light-shielding structure (200) for use in a light-emitting device according to any preceding claim, wherein the light-shielding structure (200) comprises a plurality of reflective barriers (210), each comprising a base surface (211), an upper rim ( 212) at a height (H) above the base surface (211), and a first reflective inclined surface

15 (213a) dat het basisoppervlak (211) en de bovenste rand (212) verbindt;15 (213a) connecting the base surface (211) and the top edge (212);

waarbij het eerste reflectief hellend oppervlak (213a) is ingericht voor het reflecteren van lichtstralen die uitgestraald zijn met een eerste invalshoek al ten opzichte van een as (A, A’, A”) die in hoofdzaak loodrecht is op het basisoppervlak (211), tussen een eerste vooraf bepaalde hoek en 90°, met een eerste reflectiehoek βΐ ten opzichte van de as (A, A’, A”) die kleiner is dan 60°.the first reflectively inclined surface (213a) being arranged to reflect light rays emitted with a first incident angle already with respect to an axis (A, A ', A ”) substantially perpendicular to the base surface (211), between a first predetermined angle and 90 °, with a first reflection angle βΐ with respect to the axis (A, A ', A ”) that is less than 60 °.