Glare-reducing optic

Abstract

Optic assembly (10), comprising at least one light entrance surface, configured to receive light from a light source (21), at least one first light emission structure (100), a plurality of second light emission structures (110), and a body (120), configured to receive light from the light entrance surface (130), guide a first part of the received light to the at least one first light emission structure (100), distribute a second part of the received light within the body, and guide the distributed second part of the received light to the plurality of second light emission structures (110).

Description

[0001] Glare-Reducing Optic

[0002] The invention relates to an optic assembly for reducing glare, and a luminaire employing said optic assembly.

[0003] Glare is a problem in a great deal of lighting scenarios. A known manner of reducing glare is to add a diffusor to an optic assembly. The use of a diffusor though reduces lighting efficiency. Also, the use of light sources, which produce light over a large surface area, such as fluorescent gas discharge lamps achieves a reduction in glare. This approach though is limiting with regard to the employable light sources. Especially, in combination with LED light sources, glare is a significant problem, since the light emission of LEDs is concentrated to very small surface areas.

[0004] The document US 2022 / 0252775 Al shows an optic assembly for reducing glare. Light from a light source enters a lens, and is distributed by this lens into a broad emission angle. Part of the resulting light is scattered through a large surface area body, while a part of the resulting light is focused through further lenses and emitted in a directional beam. This approach is disadvantageous since it requires a great deal of components.

[0005] Accordingly, the object of the invention is to provide an optic assembly and an according luminaire, which achieve a glare-reduced light emissions characteristic while requiring only a simple construction manner.

[0006] The object is solved by the features of the independent claims. Additional features of the invention are provided in the dependent claims. In the following, parts of the description and drawings referring to embodiments which are not covered by the claims are not presented as embodiments of the invention, but as examples useful for understanding the invention.

[0007] According to a first aspect of the invention, an optic assembly is provided. The optic assembly comprises at least one light entrance surface, configured to receive light from a light source, at least one first light emission structure, and a plurality of second light emission structures. Moreover, the assembly comprises a body, configured to receive light from the light entrance surface, guide a first part of the received light to the at least one first light emission structure, distribute a second part of the received light within the body, and guide the distributed second part of the received light to the plurality of second light emission structures. By directly distributing the light from the light source to both the at least one first light emission structure and the plurality of second light emission structures, a very simple construction and a glare-reduced light emissions characteristic can be achieved. Advantageously, the light does not leave the body before being guided into the at least one first light emission structure and the plurality of second emission structures. Thereby, a loss of light is prevented.

[0008] Preferably, the body consists of a plastic material, most preferably from a pmma material. Additionally or alternatively, the at least one first light emission structure consist of a plastic material, most preferably a pmma material. Additionally or alternatively, the plurality of second light emission structures consist of a plastic material, preferably from a pmma material. The manufacture of the structures from a plastic material, preferably from a pmma material allows for a very simple manufacturing process and beneficial light transmission and emission characteristics.

[0009] Advantageously, the body, the at least one first light emission structure, and the plurality of second light emission structures consist of a single piece of material. Alternatively, the body and the at least one of light emission structure or the body and the second plurality of light emission structures or the at least one first light emission structure and the plurality of second light emission structures can be manufactured from a single piece of material. All of these options result in a very simple manufacturing process, and improve the light transmission characteristics due to a reduced number of internal surfaces, which might scatter light.

[0010] Advantageously, the plurality of first light emission structures are distributed over light emission surface of the optic assembly. The plurality of second light emission structures are arranged between the plurality of first light emission structures along the light emission surface of the optic assembly. A significant reduction in glare can thereby be achieved.

[0011] Further advantageously, the optic assembly comprises a plurality of first light emitting structures, and a plurality of light entrance surfaces. One of the plurality of light entrance surfaces is arranged opposite of each first emission structures; i.e. every one of the light entrance surfaces is (optically) associated with another one of the first emission structures. The plurality of second light emission structures are arranged between the plurality of first light emission structures along the light emission surface of the optic assembly, preferably filling the entire area between the plurality of first light emission structures. Thereby, an especially high amount of glare reduced illumination can be achieved. Advantageously, the plurality of first light emission structures have an average distance d3 from each other. d3 is 5mm-50mm, preferably 8mm-3omm, most preferably I2mm-2omm. By use of these distances, a beneficial directed light emission characteristic is achieved, while still leaving enough room for the second light emission structures to achieve a glare reduction and a diffuse light emission.

[0012] Preferably, the at least one first light emission structure comprises a circular lens, having a diameter di of 2mm-3omm, preferably 4mm-20mm, most preferably 8mm-i2mm. Additionally or alternatively, the at least one first light emission structure comprises elliptical lens, having a major axis of di of 2mm-30mm, preferably 4mm-20mm, most preferably 8mm-i2mm. Also an asymmetrical lens can be used. Advantageous light emission characteristics can thereby be achieved. In case of the lens being circular, a symmetric light distribution characteristic is achieved. In case of the lens being elliptical or asymmetrical, an asymmetrical light distribution can be achieved.

[0013] Advantageously, the plurality of second light emission structures are a matrix of lenses. Beneficial light diffusing characteristics can thereby be achieved.

[0014] Advantageously, the lenses of the matrix of lenses have a diameter d2 of o,5mm-iomm, preferably imm-smm, most preferably i,5mm-3mm. Thereby, a beneficial diffusing characteristic can be achieved.

[0015] Preferably, the lenses of the matrix of lenses are circular or elliptical or hexagonal or square shaped or rectangle shaped lenses. Additionally or alternatively, the lenses of the matrix of lenses are convex with regard to the body of the optical assembly. Additionally or alternatively, the edge of the surface of each of the lenses of the matrix of lenses rises with an angle a, wherein a is 5°-45°, preferably io°-35°, most preferably 15°-25O. By use of any of these measures, the diffusing characteristics can be improved, while a simple manufacturing is achieved.

[0016] Advantageously, the body, the at least one first light emission structure and the plurality of second light emission structures form a largely flat shape or a convex shape with regard to a light emission direction. A simple manufacturing can thereby be achieved, while attaining a beneficial light emission characteristic.

[0017] Preferably, the body comprises a rear surface. The rear surface and emission surfaces of the at least one first light emission structure and the plurality of second light emission structures are configured to reflect light inside the body, preferably by way of total internal reflection, facilitating a distribution of light within the body. A homogenous light emission over the entire surface area of the optic assembly is thereby achieved. This allows for a significant increase in visual comfort, due to reducing the contrast between the bright spots of individual LEDs and the background of and optic.

[0018] Advantageously, the at least one first light emission structure is configured to emit light in a directed manner, and the plurality of second light emission structures are configured to emit light in a diffuse manner. This achieves a desired light emission distribution.

[0019] According to a second aspect of the present invention a luminaire is provided. The luminaire comprises an optic assembly according to the first aspect and a light source. A beneficial lighting characteristic can thereby be achieved.

[0020] Advantageously, the light source is an LED module, comprising at least one LED. The at least one LED is arranged opposite of the at least one first light emitting structure. Thereby, a high intensity directed light emission characteristic through the first light emission structures can be achieved, while a diffuse light emission through the second light emission structures is achieved for reducing glare.

[0021] Advantageously, the LED module is coated with white reflective material. This achieves an efficiency improvement.

[0022] Advantageously, the at least one LED comprises at least a first group of LEDs and a second group of LEDs. A greater flexibility in light generation is thereby achieved.

[0023] Further advantageously, the luminaire comprises a switch configured to selectably, in a first stage, connect in parallel, the LEDs of the first group of LEDs and the LEDs of the second group of LEDs. Moreover, the switch is configured to selectably, in a second stage, disconnect the LEDs of the first group of LEDs and the LEDs of the second group of LEDs. It is thereby possible to drive the LEDs of the first group of LEDs and the LEDs of the second group of LEDs jointly and alternatively, separately. This increases the flexibility of use.

[0024] In a further alternative, the LEDs of the first group of LEDs are white LEDs with a first color temperature, and the LEDs of the second group of LEDs are white LEDs with a second color temperature. The first color temperature is therein preferably different from the second color temperature. This allows for a mixing of the light emitted by the two groups of LEDs and thereby allows for a control of the overall color temperature. A homogenous mixing of the emitted light is thereby achieved, so that the individual colors of the LEDs cannot be seen. Especially, the use of the afore-described optics together with the LEDs of different colors helps achieve this homogeneity by providing an enhanced mixing of the colors.

[0025] Preferably, the first color temperature is between 1800K and 3700K, preferably between 1900K and 3500K, most preferably 2200K or 2400K or 2700K or 3000K. The second color temperature is between 3700K and 7000K, preferably between 3900K and 6000K, most preferably either 4000K or 5700K. This allows for an effective controllability of the final color temperature, emitted.

[0026] Advantageously, the luminaire comprises a first driver configured to drive the first group of LEDs and a second driver configured to drive the second group of LEDs. The luminaire moreover comprises a controller, configured to control the first driver to drive the first group of LEDs to emit light in an adjustable first strength and to control the second driver to drive the second group of LEDs to emit light in an adjustable second strength. This allows for a simple construction for achieving the adjustable color temperature.

[0027] It should be noted that the first driver and the second driver can be formed by two channels of a single driver microchip. In that case, each of the channels is dedicated to a single group of LEDs. Also the drivers and the controller can be formed by a single microchip.

[0028] Further advantageously, the controller is configured to adjust a total output color temperature of the luminaire resulting from a mixing of the light emitted by the first group of LEDs and the light emitted by the second group of LEDs, to a preset value or to a value received from an external controller, or to a user selectable value, by adjusting the first strength and the second strength. This allows for an especially great flexibility of use.

[0029] Advantageously, a color rendering index of the LEDs of the first group of LEDs is at least 70, preferably at least 80, most preferably at least 90. Additionally or alternatively, a color rendering index of the LEDs of the second group of LEDs is at least 70, preferably at least 80, most preferably at least 90. An especially high color rendering index of the final output line can thereby be achieved.

[0030] In an alternative construction, a color rendering index of the LEDs of the first group is below 90, preferably below 80, most preferably below 70. Additionally or alternatively, a color rendering index of the LEDs of the second group of LEDs is below 90, preferably below 80, most preferably below 70. This allows for a use of very low-cost LEDs. Advantageously, the first group of LEDs comprises a same number of LEDs as the second group of LEDs. Alternatively, the first group of LEDs comprises a different number of LEDs than the second group of LEDs. This allows for a flexible construction.

[0031] Further advantageously, the first group of LEDs comprises 1 - too, preferably 4 - 50, most preferably 6 - 80 LEDs. Additionally or alternatively, the second group of LEDs comprises 1 - too, preferably 4 - 50, most preferably 6 - 80 LEDs. This allows for a high flexibility of construction.

[0032] Advantageously, the LED module is of rectangular shape. This allows for a simple construction.

[0033] Advantageously, in case of a rectangular shape of the LED module, a ratio of the number of LEDs of the first group of LEDs to the number of LEDs of the second group of LEDs is 1:1.

[0034] Preferably, the LEDs of the first group of LEDs are arranged in a first line on the LED module, and the LEDs of the second group of LEDs are arranged in a second line on the LED module. This allows for an especially simple construction.

[0035] Alternatively, the LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly on a first line on the LED module, and LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly on a second line on the LED module. The LEDs of the first group of LEDs on the first line are arranged opposite LEDs of the second group of LEDs on the second line. This allows for an especially homogenous light emission.

[0036] Alternatively, LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly in groups of 2 or 3 on a first line of the LED module. Moreover, LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly in groups of 2 or 3 on a second line on the LED module. LEDs of the first group of LEDs on the first line are arranged opposite LEDs of the second group of LEDs on the second line. This allows for an acceptable homogeneity of the emitted light, while at the same time reducing construction complexity due to a simplification of the wiring.

[0037] Alternatively, LEDs of the first group and of the second group are arranged alternatingly on a first line and on a second line on the LED module. LEDs of the first group of LEDs on the first line are arranged opposite LEDs of the first group of LEDs on the second line. This achieves an acceptable homogeneity of the emission, while reducing construction complexity due to a simplification of the wiring.

[0038] In a further alternative, LEDs of the first group of LEDs and LEDs of the second group of LEDs are arranged in an alternating pattern on the LED module. This achieves the bestpossible homogeneity of the light emission.

[0039] Alternatively, the LED module is of a hexagonal or octagonal or round shape. This allows for an especially omnidirectional light emission.

[0040] Advantageously, in case of a hexagonal or octagonal or round shape of the LED module, a ratio of the number of LEDs of the first group of LEDs to the number of LEDs of the second group of LEDs is 4:5 to 5:4.

[0041] Advantageously, the LEDs of the first group are arranged in a first circle and in a third circle on the LED module, while the LEDs of the second group are arranged in a second circle on the LED module. The first circle is larger than the second circle and the second circle is larger than the third circle. This achieves an acceptably simple wiring, while at the same time achieves a high homogeneity of the light emission.

[0042] Alternatively, the LEDs of the first group of LEDs are arranged in a first circle on the LED module while the LEDs of the second group of LEDs are arranged in a second circle on the LED module. The first circle and the second circle therein have different diameters. This achieves a simple wiring and an acceptable homogeneity of the light emission.

[0043] Alternatively, the LEDs of the first group of LEDs are arranged in a first LED rectangle on the LED module while the LEDs of the second group of LEDs are arranged in a second rectangle on the LED module. The first rectangle and the second rectangle have different dimensions. This allows for an acceptably simple wiring, while achieving an acceptable homogeneity of the light emission.

[0044] In a further alternative, the LEDs of the first group of LEDs and the LEDs of the second group of LEDs are arranged in an alternating pattern on the LED module. The best-possible homogeneity is thereby achieved.

[0045] An exemplary embodiment of the invention is now further explained with respect to the drawings, in which Fig. i shows a first embodiment of the optical assembly according to the present invention;

[0046] Fig. 2 shows a detail view of a second embodiment of the optical assembly of the present invention;

[0047] Fig. 3 shows a first embodiment of the luminaire according to the present invention including a third embodiment of the optical assembly of the present invention;

[0048] Fig. 4 shows a fourth embodiment of the optical assembly according to the present invention;

[0049] Fig. 5 shows a fifth embodiment of the optical assembly of the present invention;

[0050] Fig. 6 shows a sixth embodiment of the optical assembly according to the present invention;

[0051] Fig. 7 shows a seventh embodiment of the optical assembly according to the present invention;

[0052] Fig. 8 shows a light emission characteristic of an eighth embodiment of the optical assembly according to the present invention;

[0053] Fig. 9 shows a light emission characteristic divided by light emission structure, of a ninth embodiment of the optical assembly according to the present invention;

[0054] Fig. io shows a light distribution of a tenth embodiment of the optical assembly of the present invention;

[0055] Fig. n shows a light distribution of an eleventh embodiment of the optical assembly of the present invention;

[0056] Fig. 12 shows a heat map of light emission of a twelfth embodiment of the optical assembly according to the present invention.

[0057] Fig. 13 shows an LED module of a thirteenth embodiment of the present invention,

[0058] Fig. 14 shows an LED module of a fourteenth embodiment of the present invention, Fig. 15 shows an LED module of a fifteenth embodiment of the present invention,

[0059] Fig. 16 shows an LED module of a sixteenth embodiment of the present invention,

[0060] Fig. 17 shows an LED module of a seventeenth embodiment of the present invention,

[0061] Fig. 18 shows an LED module of an eighteenth embodiment of the present invention,

[0062] Fig. 19 shows an LED module of a nineteenth embodiment of the present invention,

[0063] Fig. 20 shows an LED module of a twentieth embodiment of the present invention,

[0064] Fig. 21 shows an LED module of a twenty-first embodiment of the present invention,

[0065] Fig. 22 shows an LED module of a twenty-second embodiment of the present invention,

[0066] Fig. 23 shows an LED module of a twenty-third embodiment of the present invention.

[0067] First we demonstrate the general construction and function of an exemplary embodiment along Fig. 1. With regard to Fig. 2-7, further details of different embodiments are explained in detail. Along Fig. 8-12, the light distribution of different embodiments is explained in greater detail. Along Fig. 13 - 23 different constructions of the LED module are shown and explained. Similar entities and reference numbers in different figures have been partially omitted.

[0068] In Fig. 1, a first embodiment of the optic assembly 10 as part of a luminaire 1 is shown. The luminaire 1 comprises the optic assembly 10 and a light source 21 mounted on a substrate 20. The optic assembly 10 comprises a first light emission structure 100, and a plurality of second light emission structures 110, of which a number are shown, here. The optic assembly 10 moreover comprises a body 120. The optic assembly 10 comprises a light entrance surface 130 and a light emission surface 131. The light entrance surface 130 is here for example formed by a cavity on a rear side of the body 120. Alternatively, instead of a cavity, also a flat rear surface of the body 120 could be used as a light entrance surface 130. The light source 21 would then be mounted against the rear surface of the body 120, preferably with at least a small gap, so as not to damage the light source 21 during mounting. The light emission surface 131 covers both the surface of the plurality of first light emission structures 100 and the plurality of second light emission structures 110.

[0069] The light source 21 is mounted directly on the substrate 20. For example, the light source 21 is an LED, or a cluster of LEDs. The body 120 is preferably mounted directly on the substrate 20.

[0070] The first light emission structure 100, shown here has a diameter di, which is preferably 2mm-30mm, more preferably 4mm-20mm, most preferably 8mm-i2mm.

[0071] The first light emission structure 100, shown here preferably is a lens, especially either a circular lens, or an elliptical lens. In case of an elliptical lens, the measurements given before for the diameter di are to be considered measurements for the major axis of the ellipse. Also other shapes of lenses can be used.

[0072] Also asymmetrical lenses, leading to an asymmetrical light distribution characteristics can be used as first light emission structures. A combination of symmetrical and asymmetrical lenses, and lenses of different shapes in general, may be used.

[0073] The first light emission structure too shown here has a protruding ring section 102 and an indentation 101 in the cross-sectional view of Fig. 1. This central indentation allows for a further fine-tuning of the light emission characteristic.

[0074] The plurality of second light emission structures 110 advantageously form a matrix of lenses. These lenses can also have different shapes. Circular lenses, elliptical lenses, square-shaped lenses, rectangular-shaped lenses or hexagonal lenses are perceivable. Also, other shapes of lenses can be used on this matrix of lenses. Advantageously, the entire surface area of the optical assembly, not covered by the plurality of first light emission structures too are covered by the plurality of second light emission structures 110.

[0075] The lenses of the matrix of lenses preferably have a diameter d2 of 0,5-iomm, more preferably imm-smm, most preferably l,5mm-3mm.

[0076] The body 120 and / or the at least one first light emission structure 110 and / or the plurality of second light emission structures 110 may be manufactured from the same piece of material. Manufacturing at least two, preferably all three of these components from a single piece of material achieve a very simple manufacturing process. Any or all of these components are moreover advantageously manufactured from a plastic material, preferably by a pmma material. This further simplifies manufacturing.

[0077] In this embodiment only a single first light emission structure 100 is comprised by the optic assembly 10. An arrangement of a plurality of first light emission structures 100, as shown in the further figures is though possible.

[0078] In Fig. 2, a second embodiment of the optic assembly according to the present invention is shown. Here, the shape of the lenses of the second light emission structures no is shown in detail. Especially, an angle a, with which the lens of the second light emission structure no rises at its edge is readily visible. This angle a is 5-450, preferably 10-35°, most preferably 15- 250.

[0079] In Fig. 3, an embodiment of the luminaire according to the present invention including an optic assembly according to the present invention is shown. Here a plurality of first light emission structures too and the plurality of second light emission structures 110 are shown. Here, the first light emission structures 100a, 100b are shown with two different cut portions. While the first light emission structures 100a show a cut through a center of the respective first light emission structure 100a, the first light emission structures 100b are shown cut slightly off center. Also a use of two or more different types of first light emission structures is possible. By using first light emission structures of different light emissions characteristics, an even more precise control over the overall light emission characteristic can be achieved.

[0080] Also, in Fig. 3, a substrate 120, on which the optic assembly is mounted, is readily visible.

[0081] Fig. 4 shows a further embodiment of the optic assembly according to the present invention in a three-dimensional view. Here, the distribution of the first light emission structures tooand the second light emission structures 110 over a surface area of the optic assembly is shown.

[0082] The cross-shaped recess in the central area of the optic assembly is only for mounting purposes and / or for aesthetical purposes, and has no relevance to the present invention.

[0083] In Fig. 5, an further embodiment of the optical assembly of the present invention in shown. In a simplified top-down view, here the distribution of first light emission structures too and second light emission structures 110 are shown. Mounting holes 109 are shown .

[0084] In Fig. 6, a further embodiment of the optic assembly according to the present invention is shown. In Fig. 6, a hexagonal shape of the optical assembly is shown. Here an average distance d3 between the first light emission structures is shown. The distance is not always the same, but d3 refers to the average distance between adjacent first light emission structures. In calculating this average distance, obviously, the central cross-shaped recess is not taken into account.

[0085] In Fig. 7, a further embodiment of the optic assembly of the present invention is shown. Here, a rectangular shape of the optic assembly is shown. Again, the distance d3 between the first light emission structures is indicated.

[0086] In Fig. 8, a light distribution within and outside of the luminaire and optic assembly are shown. It can readily be seen that the centrally shown first light emission structure results in a directed light emission, while the second light emission structures located towards the side of the figure result in a diffuse distributed light distribution characteristic.

[0087] Also readily visible are internal reflections of light emitted by the light source. The reflections occur between the internal surfaces of the body and the first and second light emission structures. These internal reflections further distribute the light within the body and result in an optimal distribution of the light emission.

[0088] In Fig. 9, the light emission and internal light distribution within an embodiment of the present invention is shown. The left side of the figure only shown the rays of light interacting with the first light emission structure, while the right side of the figure only shown rays of light interacting with the second light emission structures. It can readily be seen how the different light emission structures generate different light emission characteristics.

[0089] In Fig. io, a light directivity of a further embodiment of the present invention is shown. Especially, the diffuse light emission in the side lobes is readily visible.

[0090] In Fig. n, a light distribution characteristic of a further embodiment of the present invention is shown. Here, the use of asymmetric light emission structures, such as asymmetric lenses can readily be seen.

[0091] Finally, in Fig. 12, a heat map of light emission of a further embodiment of the present invention is shown. Here, different light strengths emitted by different regions of the optic assembly can be seen. While the second light emission structures no generate a low level diffuse light, the first light emission structures 100 generate a more focused, stronger light emission. It can readily be seen that by use of these different types of light emission structures, the light emission can be fine-tuned to a desired characteristic.

[0092] In Fig. 13, an LED module 200 of an embodiment of the present invention is shown. The LED module 200 has a hexagonal shape. A first group of LEDs 210 is arranged on a larger outer circle on the LED module 200, while a second group of LEDs 211 is arranged on a smaller inner circle on the LED module 200.

[0093] The LEDs of the first group of LEDs 210 therein have a different color temperature from the LEDs of the second group of LEDs 211. Alternatively, the LEDs of the first group of LEDs 210 and of the second group of LEDs 211 can be identical.

[0094] The first color temperature is between 1800K and 3700K, preferably between 1900K and 3500K, most preferably 2200K or 2400K or 2700K or 3000K. The second color temperature is between 3700K and 7000K, preferably between 3900K and 6000K, most preferably either 4000K or 5700K.

[0095] In order to achieve a good overall color rendering index, a color rendering index of the LEDs of the first group of LEDs is at least 70, preferably at least 80, most preferably at least 90. Additionally or alternatively, a color rendering index of the LEDs of the second group of LEDs is at least 70, preferably at least 80, most preferably at least 90.

[0096] In order to achieve an especially low cost implementation, a color rendering index of the LEDs of the first group is below 90, preferably below 80, most preferably below 70. Additionally or alternatively, a color rendering index of the LEDs of the second group of LEDs is below 90, preferably below 80, most preferably below 70.

[0097] Moreover, the LEDs of the first group of LEDs 210 may be connected to a first driver, while the LEDs of the second group of LEDs 211 are connected to a second driver. This is especially relevant in case the LEDs of the two groups are different. Therein, the LEDs of the first group of LEDs may be connected in series, and the LEDs of the second group of LEDs may be connected in series. The series connection of the LEDs of the first group of LEDs is connected to the first driver, while the series connection of the LEDs of the second group of LEDs is connected to the second driver.

[0098] The LEDs of the first group of LEDs and the LEDs of the second group of LEDs can then be controlled independently, for mixing a desired output color. Such a mixing can be controlled by a controller, which controls the drivers. Especially, said controller can perform the control based upon a preset value, a signal received from an external source, or a user input.

[0099] Advantageously, a switch is present, which can either connect or disconnect the LEDs of the first group of LEDs and the LEDs of the second group of LEDs from each other. In case they are disconnected, a driving by two different drivers is possible. If the LEDs though are connected, only a single driver is necessary. The color mixing ability then is lost, though.

[0100] In this embodiment, the first group of LEDs comprises 8 LEDs, while the second group of LEDs comprises 9 LEDs. Also other numbers of LEDs are possible.

[0101] For example, the first group of LEDs can comprise 1 - too, preferably 4 - 50, most preferably 6 - 80 LEDs. Additionally or alternatively, the second group of LEDs can 1 - too, preferably 4 - 50, most preferably 6 - 80 LEDs.

[0102] In Fig. 14, an LED module 200 of a further embodiment of the invention is shown. Here, a first group of LEDs 220 comprises 8 LEDs and is arranged on an inner smaller circle, while a second group of LEDs 221 comprises 10 LEDs and is arranged on a larger outer circle.

[0103] In Fig. 15, an LED module 200 of a further embodiment of the present invention is shown. Here, a first group of LEDs 230 is arranged on a first ellipsoid on the LED module 200, wherein a second group of LEDs 231 is arranged on a second ellipsoid on the LED module. The ellipsoids therein intersect. This achieves an especially homogenous light emission.

[0104] In Fig. 16, a further embodiment of the present invention is shown. Here, the LED module 300 has a rectangular shape. LEDs of a first group of LEDs 310 and LEDs of a second group of LEDs 311 are arranged on two lines along the length of the LED module 300 in an alternating manner, wherein an LED of the first group of LEDs always lies opposite to an LED of the second group of LEDs. This achieves an especially high homogeneity of light emission.

[0105] In Fig. 17, a further embodiment of the present invention is shown. Here, the LED module 300 comprises LEDs of a first group of LEDs 320 and a second group of LEDs 321. The LEDs of the first group of LEDs 320 are arranged on a first line, while the LEDs of the second group of LEDs 321 arranged on a second line. This achieves a less ideal homogeneity, but a very simple wiring. In case of a hexagonal or octagonal or round shape of the LED module, a ratio of the number of LEDs of the first group of LEDs to the number of LEDs of the second group of LEDs is advantageously 4:5 to 5:4.

[0106] In Fig. 18, a further embodiment of the present invention is shown. Here, the LED module 300 comprises LEDs of a first group of LEDs 330 and LEDs of a second group of LEDs 331. They are each arranged in groups of three on a first line and on a second line. This achieves a compromise between resulting homogeneity of light output and wiring complexity.

[0107] In Fig. 19, a further embodiment of the present invention is shown. Here, the LED module 300 comprises six LEDs of the first group of LEDs 340 and six LEDs of the second group of LEDs 341. They are arranged in an alternating manner on two lines on the LED module, so that two LEDs of the same group of LEDs are opposite of each other on the two lines. This simplifies the construction.

[0108] In Fig. 20, a further embodiment of the present invention is shown. The LED module 300 here comprises six LEDs of the first group of LEDs 350 and six LEDs of the second group of LEDs 351. They are arranged along two lines on the LED module in groups of two, so that LEDs of different groups of LEDs are opposite each other on the two lines. This achieves a viable compromise between homogeneity of light emissions and construction complexity.

[0109] In Fig. 21, a further embodiment of the present invention is shown. Here, the LED module 300 comprises LEDs of the first group of LEDs 360 and LEDs of the second group of LEDs 361. On a first line, depicted in the left, two LEDs of the second group of LEDs 361 are arranged on the upper end, followed by three LEDs of the first group of LEDs. The first line ends with one LED of the second group of LEDs at the bottom of Fig. 21. On the second line, depicted in the right of Fig. 21, the second line begins at the top with one LED of the second group of LEDs 361, continues with three LEDs of the first group of LEDs 360 and ends with two LEDs of the second group of LEDs 361. This construction achieves a very simple wiring, while achieving an acceptable homogeneity.

[0110] In all of the embodiments of Fig. 16 - 21, six LEDs are present in each of the group of LEDss. Also here, different numbers, as explained earlier maybe used.

[0111] In Fig. 22, a further embodiment of the present invention is shown. Here, an LED module comprises 36 LEDs in total, from which 18 are from a first group of LEDs 410 and 18 are from a second group of LEDs 411. They are arranged on the rectangular LED module 400 in an alternating manner. A high homogeneity at the price of a wiring complexity is achieved. In case of a rectangular shape of the LED module, a ratio of the number of LEDs of the first group of LEDs to the number of LEDs of the second group of LEDs is advantageously 1: 1. Finally, in Fig. 23, a further embodiment of the present invention is shown. Here, the LED module 500 has an hexagonal shape. 20 LEDs of a first group of LEDs 510 are arranged on a first, larges circle on the LED module 500. 10 LEDs of a second group of LEDs 511 are arranged on a second circle on the LED module. The second circle is smaller than the first circle. Finally, another 12 LEDs of the first group of LEDs 510 are arranged on a third circle, which is even smaller than the second circle, on the LED module 500. This arrangement achieves a high homogeneity with an acceptable wiring complexity.

[0112] The present invention is not limited to the embodiments shown. Especially, no limitation to specific materials and exact shapes of the structures is intended. Especially, the figures are not to be understood as representing the exact measurements of the embodiments. Any and all of the shown and described features may be employed in any advantageous combination.

Claims

Claims1. Optic assembly (10), comprising:- at least one light entrance surface (130), configured to receive light from a light source (21),- at least one first light emission structure (too),- a plurality of second light emission structures (110), and- a body (120), configured to receive light from the light entrance surface (130), guide a first part of the received light to the at least one first light emission structure (too), distribute a second part of the received light within the body, and guide the distributed second part of the received light to the plurality of second light emission structures (110).

2. Optic assembly (10) according to claim 1, wherein the body (120) is configured to guide the first part of the received light directly, without leaving the body, to the at least one first light emission structure (too), guide the distributed second part of the received light directly, without leaving the body, to the plurality of second light emission structures (110).

3. Optic assembly (10) according to claim 1 or 2, wherein the body (120) consists of a plastic material, preferably from a pmma material, and / or wherein the at least one light emission structure (too) consist of a plastic material, preferably from a pmma material, and / or wherein the plurality of second light emission structures (110) consist of a plastic material, preferably from a pmma material.

4. Optic assembly (10) according to any of claims 1 to 3, wherein the body (120), the at least one first light emission structure (too), and the plurality of second light emission structures (110) consist of a single piece of material.

5. Optic assembly (10) according to any of the claims 1 to 4, wherein the at least one first light emission structure (too) is arranged on a light emission surface of the optic assembly (10), andwherein the plurality of second light emission structures (no) are arranged around the plurality of first light emission structures (loo) along the light emission surface of the optic assembly (io).

6. Optic assembly (io) according to claims 5, wherein the optic assembly comprises a plurality of first light emitting structures (100), and a plurality of light entrance surfaces (130), wherein one of the plurality of light entrance surfaces (130) is arranged opposite of each first emission structures (100), and wherein the plurality of second light emission structures (no) are arranged between the plurality of first light emission structures (too) along the light emission surface of the optic assembly (10), preferably filling the entire area between the plurality of first light emission structures (too).

7. Optic assembly (10) according to any of the claims 5 or 6, wherein the plurality of first light emission structures (too) have an average distance d3 from each other, and wherein d3 is 5mm - 50mm, preferably 8mm - 30mm, most preferably 12mm - 20mm.

8. Optic assembly (10) according to any of the claims 1 to 7, wherein the at least one first light emission structure (too) comprise a circular lens, having a diameter di of 2mm - 30mm, preferably 4mm - 20mm, most preferably 8mm - 12mm, and / or, wherein the at least one first light emission structures (too) comprises an elliptical lens, having a major axis di of 2mm - 30mm, preferably 4mm - 20mm, most preferably 8mm - 12mm.

9. Optic assembly (10) according to any of the claims 1 to 8, wherein the plurality of second light emission structures (110) are a matrix of lenses, and / or wherein the lenses of the matrix of lenses have a diameter d2 of 0,5mm - 10mm, preferably imm - 5mm, most preferably 1,5mm - 3mm, and / or, wherein the lenses of the matrix of lenses are circular or elliptical or hexagonal or square shaped or rectangle shaped lenses, and / or wherein the lenses of the matrix of lenses are convex with regard to the body (120) of the optical assembly, and / orwherein the edge of the surface of each of the lenses of the matrix of lenses rises with and angle a, wherein a is 50- 450, preferably io° - 350, most preferably 150- 250.

10. Optic assembly (10) according to any of the claims 1 to 9, wherein the light entrance surface (130) is formed as a recess and / or indentation in the body (120).

11. Optic assembly (10) according to any of the claims 1 to 10, wherein the body (120), the at least one first light emission structure (too) and the plurality of second light emission structures (110) form a largely flat shape or a convex shape with regard to a light emission direction.

12. Optic assembly (10) according to any of the claims 1 to 11, wherein the body (120) comprises a rear surface, and wherein the rear surface and emission surfaces of the at least one first light emission structure (too) and the plurality of second light emission structures (110) are configured to reflect light inside the body (120), preferably by way of total internal reflection facilitating a distribution of light within the body (120).

13. Optic assembly (10) according to any of the claims 1 to 12, wherein the at least one first light emission structure (too) is configured to emit light in a directed manner, and / or wherein the plurality of second light emission structures (110) are configured to emit light in a diffuse manner.

14. Luminaire (1), comprising an optic assembly (10) according to any of the claims 1 to 13 and a light source (21).

15. Luminaire according to claim 14, wherein the light source (21) is an LED module (21), comprising at least one LED, and wherein the at least one LED is arranged opposite of the at least one first light emitting structure.

16. Luminaire according to claim 15, wherein the at least one LED comprises at least a first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) and a second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511).17- Luminaire according to claim 16, wherein the luminaire comprises a switch configured to selectably in a first state, connect in parallel the LEDs of the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) and the LEDs of the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511), and in a second state, disconnect the LEDs of the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) and the LEDs of the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511).

18. Luminaire according to claim 16, wherein LEDs of the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360,410, 510) are white LEDs with a first color temperature, wherein LEDs of the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361,411, 511) are white LEDs with a second color temperature, and wherein the first color temperature is preferably different from the second color temperature.

19. Luminaire according to claim 18, wherein the first color temperature is between 1800K and 3700K, preferably between 1900K and 3500K, most preferably 2200K or 2400K or 2700K or 3000K, and wherein the second color temperature is between 3701K and 7000K, preferably between 3900K and 6000K, most preferably either 4000K or 5700K.

20. Luminaire according to any of claims 18 or 19, wherein the luminaire comprises a first driver configured to drive the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510), and a second driver, configured to drive the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511), and wherein the luminaire comprises a controller, configured to control the first driver to drive the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) to emit light in an adjustable first strength, and control the second driver to drive the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511) to emit light in an adjustable second strength.

21. Luminaire according to claim 20, wherein the controller is configured to adjust a total output color temperature of the luminaire resulting from a mixing of the light emitted by the first group of LEDs (210,220, 230, 310, 320, 330, 340, 350, 360, 410, 510) and the light emitted by the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511), to a preset value, or to a value received from an external controller, or to a user selectable value, by adjusting the first strength and the second strength.

22. Luminaire according to any of claims 18 to 21, wherein a color rendering index of the LEDs of the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) is at least 70, preferably at least 80, most preferably at least 90, and / or wherein a color rendering index of the LEDs of the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511) is at least 70, preferably at least 80, most preferably at least 90.

23. Luminaire according to any of claims 18 to 22, wherein a color rendering index of the LEDs of the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) is below 90, preferably below 80, most preferably below 70, and / or wherein a color rendering index of the LEDs of the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511) is below 90, preferably below 80, most preferably below 70.

24. Luminaire according to any of claims 18 to 23, wherein the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) comprises a same number of LED as the second group of LEDs (211, 221, 231, 311, 321, 33L 34L 35L 361, 411, 511), or wherein the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) comprises a different number of LED as the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511).

25. Luminaire according to any of claims 18 to 24, wherein the first group of LEDs (210, 220, 230, 310, 320, 330, 340, 350, 360, 410, 510) comprises 1 to too, preferably 4 to 50, most preferably 6 to 18 LEDs, and / or wherein the second group of LEDs (211, 221, 231, 311, 321, 331, 341, 351, 361, 411, 511) comprises 1 to too, preferably 4 to 50, most preferably 6 to 18 LEDs.

26. Luminaire according to any of claims 18 to 25, wherein the LED module (300) is of a rectangular shape.

27. Luminaire according to claim 26, wherein the LEDs of the first group of LEDs are arranged in a first line on the LED module (300), and wherein the LEDs of the second group of LEDs are arranged in a second line on the LED module (300).

28. Luminaire according to claim 26, wherein LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly on a first line on the LED module (300), wherein LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly on a second line on the LED module (300), and wherein LEDs of the first group of LEDs on the first line are arranged opposite LEDs of the second group of LEDs on the second line.

29. Luminaire according to claim 26, wherein LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly in groups of two on a first line on the LED module (300), wherein LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly in groups of two on a second line on the LED module (300), and wherein LEDs of the first group of LEDs on the first line are arranged opposite LEDs of the second group of LEDs on the second line.

30. Luminaire according to claim 26, wherein LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly in groups of three on a first line on the LED module (300), wherein LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly in groups of three on a second line on the LED module (300), and wherein LEDs of the first group of LEDs on the first line are arranged opposite LEDs of the second group of LEDs on the second line.

31. Luminaire according to claim 26, wherein LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly on a first line on the LED module (300), wherein LEDs of the first group of LEDs and of the second group of LEDs are arranged alternatingly on a second line on the LED module (300), and wherein LEDs of the first group of LEDs on the first line are arranged opposite LEDs of the first group of LEDs on the second line.

32. Luminaire according to claim 26, wherein the LEDs of the first group of LEDs and the LEDs of the second group of LEDs are arranged in an alternating pattern on the LED module (300, 400).

33. Luminaire according to any of claims 18 to 25, wherein the LED module (200) is of a hexagonal or octagonal or round shape.

34. Luminaire according to claim 33, wherein the LEDs of the first group of LEDs are arranged in a first circle and in a third circle on the LED module (200), wherein the LEDs of the second group of LEDs are arranged in a second circle on the LED module (200), wherein the first circle is larger than the second circle, and the second circle if larger than the third circle.

35. Luminaire according to claim 33, wherein the LEDs of the first group of LEDs are arranged in a first circle on the LED module (200), wherein the LEDs of the second group of LEDs are arranged in a second circle on the LED module (200), and wherein the first circle and the second circle have different diameters.

36. Luminaire according to claim 33, wherein the LEDs of the first group of LEDs are arranged in a first rectangle on the LED module (21), wherein the LEDs of the second group of LEDs are arranged in a second rectangle on the LED module (21), and wherein the first rectangle and the second rectangle have different dimensions.

37. Luminaire according to claim 33, wherein the LEDs of the first group of LEDs and the LEDs of the second group of LEDs are arranged in an alternating pattern on the LED module (400).

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