Lamp

Abstract

A luminaire includes a first lighting element and an array of second lighting elements surrounding the first lighting element. The first illumination element emits a light beam centered on a first light beam axis. The second lighting elements emit light away from the first lighting element, each second lighting element emitting a light beam centered on a corresponding second light beam axis. An angle between each second beam axis and the first beam axis is between 45 DEG and 90 DEG.

Description

Technical Field

[0001] This invention relates to the field of artificial lighting, and more particularly to luminaires for providing artificial lighting. Background Technology

[0002] There is a continuing need for improved artificial lighting arrangements that provide artificial light in a wide range of environments, such as homes, industries, and / or public facilities.

[0003] One area of ​​particular interest is the use of so-called artificial skylights. These are light fixtures designed to simulate or mimic the appearance of windows that provide sunlight (e.g., the sky and / or the sun). Such artificial skylights are typically (but not required) installed in the ceiling.

[0004] There is a continued need to reduce the artificial feel of lighting fixtures that can be used as artificial skylights. Summary of the Invention

[0005] This invention is defined by the claims.

[0006] According to an embodiment of one aspect of the invention, a luminaire is provided, comprising: a first lighting element occupying a central portion of the luminaire and configured to emit light, wherein the light emitted by the first lighting element is centered on a first beam axis; and an array of second lighting elements surrounding the central portion of the luminaire and configured to emit light in a direction away from the first beam axis, wherein the light emitted by each second lighting element is centered on a corresponding second beam axis, wherein each second beam axis forms an angle between 45º and 90º with the first beam axis.

[0007] This disclosure provides a luminaire that emits a first light in a first general direction and emits a second light in a direction away from the first general direction, the direction away from the first general direction forming an angle between 45º and 90º with the first general direction. This advantageously increases the perceived size of the first light, thereby increasing the similarity of the luminaire to a real skylight.

[0008] In some instances, the luminaire also includes a diffuser surrounding the array of second lighting elements and configured to receive light emitted by the array of second lighting elements. This provides an improved light distribution of the light emitted by the array of second lighting elements, thereby reducing the perceived artificial light provided by the luminaire.

[0009] In some instances, the diffuser has a curved cross-sectional shape in any half-plane defined by the first beam axis and containing any second beam axis.

[0010] In some instances, the diffuser has a cross-sectional shape of an arc segment or annular segment in any half-plane defined by the first beam axis and containing any second beam axis.

[0011] In some embodiments, the array of second illumination elements includes: a first layer of second illumination elements located in a first plane orthogonal to the first beam axis; and a second layer of second illumination elements located in a second plane parallel to the first plane.

[0012] This method provides a technique for promoting gradient light effects in light emitted by an array of second illuminating elements. Specifically, by defining two separate layers or rows of the second illuminating elements, light of different colors emitted by each layer will undergo color mixing by a diffuser to form a gradient. This can be advantageously used to provide gradient effects, for example, similar to light conditions such as sunrise or sunset.

[0013] Alternatively, if both layers emit light with the same color and / or color temperature, the proposed multilayer array of second illumination elements also functions to improve the uniformity of light distribution across the diffuser, and thus improve the uniformity of light output by luminaires using the array of second illumination elements.

[0014] In some instances, the first layer of the second lighting element emits light of different colors and / or color temperatures to the second layer of the second lighting element. This provides a gradient lighting effect for the light emitted from the luminaire using the second lighting element.

[0015] In some instances, in a direction parallel to the axis of the first beam, the minimum distance between any of the second illumination elements and the diffuser is no greater than the distance between the first and second planes, for example, no greater than half the distance between the first and second planes. This dimensional relationship increases the likelihood of natural gradient effects of colored light, or (if the two layers emit light of the same color) the likelihood of a uniform brightness distribution.

[0016] In some instances, the sag of the diffuser's cross-sectional shape in any half-plane defined by the first beam axis and containing the second beam axis is between 0.6 and 1.4 times the distance between the first and second planes. This dimensional relationship also increases the likelihood of natural gradient effects of colored light, or (if both layers emit light of the same color) the likelihood of a more uniform brightness distribution.

[0017] The luminaire may further include an array of third lighting elements surrounding a central portion of the luminaire, the array of third lighting elements being configured to emit light in a direction toward the axis of the first beam. Therefore, the light emitted by the array of third lighting elements represents or resembles a surface illuminated by the first lighting element (e.g., mimicking a surface illuminated by sunlight or natural light). Thus, the use of the array of third lighting elements increases the luminaire's similarity to a real skylight.

[0018] In some instances, the light emitted by each third illumination element is centered on the corresponding third beam axis, wherein each third beam axis forms an angle between 45º and 90º with the first beam axis.

[0019] The array of the second and third lighting elements can be mounted on the same heat sink. This method significantly reduces the material cost and weight of the luminaire. The reduced weight of the luminaire advantageously increases the ease of installation and / or assembly.

[0020] In some instances, the heat sink comprises a tubular element surrounding the central portion of the luminaire. This shape and structure provides the heat sink with good structural integrity and improved heat dissipation. However, other shapes and configurations of the heat sink are also conceivable.

[0021] The first lighting element may include: a light emitting plate including a light output surface from which light is emitted from the first lighting element; and a first light source configured to illuminate the entire light output surface. This allows the first lighting element to operate or function as a panel light, which is more similar to a window or other surface that emits sunlight.

[0022] In a preferred embodiment, the size of the light output surface is not less than 100 cm. 2 Therefore, the first light-emitting element can effectively serve as a panel light or light-emitting surface for an artificial skylight.

[0023] In a preferred embodiment, the first illumination element is configured to emit light having a wavelength between 400 nm and 500 nm. Therefore, the first light-emitting element can be configured to emit blue light.

[0024] These and other aspects of the invention will become apparent and will be elucidated from the embodiments described below. Attached Figure Description

[0025] To better understand the invention and to more clearly show how the invention can be practiced, reference will now be made only by way of example to the accompanying drawings, in which: Figure 1 This is an exploded view of the proposed lighting fixture; Figure 2This is a partial exploded view of the proposed lighting fixture; Figure 3 The proposed lighting fixture is shown; Figure 4 This is a cross-sectional view of the proposed luminaire; Figure 5 This is a cross-sectional view of the alternative lighting fixture; Figure 6 A cutaway portion of the alternative lighting fixture is shown; Figure 7 This is an enlarged cross-sectional view of a part of an alternative lighting fixture; Figure 8 This is a cross-sectional view of another alternative lighting fixture; Figure 9 It is a cross-sectional view of yet another alternative lighting fixture; and Figure 10 The lighting fixture is shown. Detailed Implementation

[0026] The invention will be described with reference to the accompanying drawings.

[0027] It should be understood that while the detailed description and specific examples indicate exemplary embodiments of the devices, systems, and methods, they are for illustrative purposes only and are not intended to limit the scope of the invention. These and other features, aspects, and advantages of the devices, systems, and methods of the invention will be better understood from the following description, the appended claims, and the accompanying drawings. It should be understood that the drawings are schematic only and not drawn to scale. It should also be understood that the same reference numerals are used throughout the drawings to denote the same or similar parts.

[0028] The present invention provides a lamp comprising a first illumination element and an array of second illumination elements surrounding the first illumination element. The first illumination element emits a light beam centered on a first beam axis. The second illumination elements emit light away from the first illumination element, and each second illumination element emits a light beam centered on a corresponding second beam axis. The angle between each second beam axis and the first beam axis is between 45° and 90°.

[0029] Figure 1 An exploded view of the proposed luminaire 100 is provided to improve the understanding of the different components of the luminaire 100.

[0030] The luminaire 100 includes a first lighting element 110 and an array 120 of second lighting elements.

[0031] The first illumination element 110 occupies the central portion of the luminaire 100. The first illumination element 100 is configured to emit light. The light emitted by the first illumination element is centered on a first beam axis X1. In a specific example, the first beam axis X1 intersects the center of the luminaire 100.

[0032] Preferably, the direction of the first beam axis is in a direction away from the surface on which the luminaire is mounted or positioned. For example, if the luminaire 100 is positioned on the ceiling, the first beam axis X1 can be in a downward direction. Preferably, the luminaire 100 protrudes completely from the mounting surface of the ceiling.

[0033] More specifically, the first lighting element may include a light emitting plate 111 having a light output surface 112 and a first light source 115. The first light source 115 is configured to illuminate the entire light output surface 112. Therefore, the first lighting element effectively serves as or acts as a panel lamp, a lighting panel, or a light-emitting surface.

[0034] In other words, the first lighting element 110 can be a panel light or a light-emitting surface.

[0035] For example, the first light source 115 may include a plurality of light-emitting diodes (LEDs) or alternative light-generating devices such as halogen bulbs.

[0036] The size of the light output surface can be, for example, not less than 100 cm. 2 Preferably at 150 cm 2 and 10000 cm 2 In between. This method provides an imitation of artificial skylights or similar structures.

[0037] The light emitting plate 111 may include, for example, a diffuser or other optical element for diffusing, scattering or redirecting light received from the first light source 115 to illuminate the light output surface.

[0038] In the illustrated example, the first light source 115 is configured to emit light centered on the first beam axis.

[0039] In an alternative embodiment, the first light source 115 emits light into the edge of the light emitting plate 111. Therefore, the light emitting plate 111 may include an edge-incident light guide that receives light at one or more edges of the light emitting plate and outputs light at a light output surface 112 centered on the first beam axis X1.

[0040] The array 120 of the second lighting elements surrounds the central portion of the luminaire 100, namely the first lighting element 110. Therefore, the array 120 of the second lighting elements surrounds (e.g., encircles) the first beam axis X1.

[0041] Each second illumination element is configured to emit light in a direction away from the first beam axis. Therefore, the distance between the photons of any light emitted by each second illumination element and the first beam axis X1 will increase over time (assuming that the photons of the light are not interrupted or redirected).

[0042] The light emitted by each second illumination element is centered on the corresponding second beam axis Y1. Therefore, each second illumination element has its own second beam axis Y1, and the light emitted by the second illumination element is centered on this second beam axis.

[0043] The angle between each second beam axis Y1 and the first beam axis X1 is between 45º and 90º. This has been considered to have the effect of increasing the perceived size of the first illumination element 110. More specifically, arranging the array of the first and second illumination elements in this manner reduces the visibility of the physical boundary between the first illumination element and the viewer of the luminaire, thus increasing the perceived size of the first illumination element.

[0044] More preferably, the angle between each second beam axis Y1 and the first beam axis is between 60º and 90º, more preferably between 80º and 90º, and even more preferably between 89º and 90º (e.g., 90º). As the angle between each second beam axis Y1 and the first beam axis X1 gets closer to 90º, the effect of the increased perceived size of the first illumination element also increases.

[0045] In the example shown, the angle between each second beam axis Y1 and the first beam axis is 90º. However, those skilled in the art will readily understand how the second illumination element can be reconfigured to provide an alternative angle relative to the first beam axis X1 for each second beam axis Y1.

[0046] In the context of this disclosure, the angle between the second beam axis Y1 and the first beam axis X1 is the minimum angle between the two axes.

[0047] Each second lighting element may include, for example, one or more light-emitting diodes (LEDs) or alternative light-generating devices such as halogen bulbs.

[0048] Preferably, the first and second lighting elements are configured to emit light in different wavelength ranges. In some instances, the first lighting element includes one or more LEDs configured to emit red, blue, green, and / or white light with a color temperature between 5500 Kelvin (“K”) and 7000 K. The second lighting element may include LEDs configured to emit red, blue, green, and / or warm white light with a color temperature between 2500 K and 3500 K, and / or cool white light with a color temperature between 5500 K and 7000 K.

[0049] For example, the first illumination element can be configured to emit light with a wavelength between 400 nm and 500 nm (i.e., blue light), while each second illumination element can be configured to emit light with a wider wavelength range (e.g., white light). Other variations will be apparent to a person skilled in the art and may depend on user preferences and / or the specific use case.

[0050] The array 120 of the second lighting elements can be mounted on a heat sink 125. The heat sink 125 can be in the form of a tubular element surrounding the central portion of the luminaire (i.e., the first lighting element 110). This construction increases the robustness of the heat sink and improves the structural integrity of the luminaire.

[0051] In some instances, the first lighting element is adjacent to or mounted within the hollow center of the radiator 125.

[0052] The luminaire 100 may further include a diffuser 130 surrounding the array 120 of the second lighting elements. The diffuser 130 may be configured to receive (and diffuse / scatter) light emitted by the array 120 of the second lighting elements. As described in detail later, the diffuser may have a curved cross-sectional shape in a half-plane defined by a first beam axis (i.e., originating from the first beam axis) and intersecting with either of the second beam axes. In practice, the diffuser may form or define a curved (diffusing) surface surrounding the array 120 of the second lighting elements.

[0053] Figure 2 A partially assembled luminaire 100 is shown to enhance the contextual understanding of the positional relationships between the various components of the luminaire 100.

[0054] Figure 3 An assembled luminaire 100 is shown for use in enhancing contextual understanding.

[0055] Figure 4 A cross-sectional view of luminaire 100 is provided.

[0056] Figure 4 The angular relationship between the first beam axis X1 and each of the second beam axes Y1 is shown, i.e., how they are angled relative to each other.

[0057] Figure 4 The shape of the diffuser 130 is also shown, namely the curved or bow-shaped shape of the diffuser.

[0058] More specifically, Figure 4 This illustrates how the diffuser has a curved cross-sectional shape in a half-plane that originates from the first beam axis and intersects either of the second beam axes. A plane such a plane passes through... Figure 4The cross-sectional view of the lamp shown is used as an example to illustrate this.

[0059] Figure 4 Optional additional features of the luminaire 100 are also shown.

[0060] Specifically, the luminaire may include a mounting element 405 configured for mounting the luminaire to a surface, such as a ceiling. Examples of mounting elements are well known to those skilled in the art. The mounting element may serve as a backplate for the luminaire 100. The mounting element may, for example, be coupled to a heat sink 125 of a first lighting element and an array 120 for a second lighting element.

[0061] The luminaire 100 may include a support plate 407 for supporting the elements of the luminaire, the elements of which include at least a first lighting element 110 and an array 120 of second lighting elements. If present, the support plate 407 may connect to or mount a heat sink 125 thereto.

[0062] Preferably, the mounting element 405 is connected to the support plate 407 and / or the rest of the luminaire 100 via a twist-lock mechanism or other clamping mechanism. This advantageously increases the ease of assembling or installing the luminaire.

[0063] In one example, the mounting element includes one or more safety cable clips. The support plate 407 may include one or more safety cables, each connected to a corresponding safety cable clip, to secure the mounting element 405 to the support plate 407 prior to the use of the clamping mechanism. Thus, during the installation of the luminaire 100, before the support plate 407 is engaged to the mounting element using the clamping mechanism, the mounting element can be positioned against a surface, and each safety cable can engage with a corresponding safety cable clip (to reduce the risk of the luminaire falling or being damaged during subsequent installation).

[0064] The luminaire 100 may further include a power system 410 configured to provide power for driving the first lighting element 110 and the array 120 of the second lighting elements. Methods for properly driving or powering the lighting elements are well known in the art. The power system 410 may, for example, convert an AC power supply into one or more lighting power supplies for the first lighting element 110 and the array 120 of the second lighting elements.

[0065] The luminaire 100 may further include a control system 420 configured to control the operation of the first lighting element 110 and the array 120 of the second lighting elements, for example, controlling whether the first / second lighting elements emit light and / or controlling one or more lighting characteristics (e.g., color, color temperature, intensity, etc.) of the first and second lighting elements. Methods for controlling such lighting characteristics are well known in the art.

[0066] Figure 5 , 6 Figure 7 shows the various parts of the alternative lighting fixture 500. Figure 5 A cross-sectional view of luminaire 500 is provided. Figure 6 A perspective cutout of a portion of the light fixture is provided. Figure 7 An array of second lighting elements and an enlarged cross-sectional view of the diffuser are provided.

[0067] exist Figure 5 , Figure 6 and Figure 7 In this document, elements of the luminaire 500 that are similar to or the same as those previously described and identified have the same reference numerals, and may not be described in detail for the sake of brevity.

[0068] The luminaire 500 differs from the luminaires described previously in that the array of the second lighting elements includes multiple layers 521, 522 of the second lighting elements.

[0069] Specifically, the array 520 of the second illumination elements includes: at least a first layer 521 of the second illumination elements located in a first plane p1 orthogonal to the first beam axis X1; and a second layer of the second illumination elements located in a second plane p2 orthogonal to the first beam axis X1, the second plane being parallel to the first plane.

[0070] Therefore, the array 520 of the second lighting elements includes two or more rows (i.e., layers) of second lighting elements. Each row or layer surrounds or encircles the central portion of the luminaire, i.e., the first lighting element 110.

[0071] It will be understood that each second beam axis Y1 will continue to form an angle between 0º and 45º (e.g., between 0º and 30º, between 0º and 15º, between 0º and 1º (e.g., 0º)) relative to the first plane and / or the second plane.

[0072] The diffuser 130 is positioned such that the curved cross-sectional shape of the diffuser is away from each row or layer of curvature. The sag of the curved cross-sectional shape of the diffuser (in any half-plane originating from the first beam axis and intersecting with either of the second beam axes) is preferably orthogonal to the first beam axis X1, but this is not required.

[0073] In particular, such as Figure 7As best illustrated, the diffuser 130 has an arcuate shape in any half-plane originating from the first beam axis and intersecting either of the second beam axes. This arcuate shape defines a center of curvature 700. A dividing plane pd, parallel to the first plane p1 and the second plane p2, and intersecting the center of curvature 700, lies between the first plane p1 and the second plane p2. Thus, this dividing plane divides the diffuser into two hypothetical halves (the dimensions of which are not necessarily equal).

[0074] Therefore, the first layer 521 and the second layer 522 of the second illumination element can be located on both sides of the dividing plane pd, which divides the diffuser (into two hypothetical halves) and is orthogonal to the first beam axis X1.

[0075] The dividing plane pd can intersect the midpoint of the arc shape of the diffuser 700.

[0076] More preferably, the distance between the first layer 521 and the dividing plane pd is (substantially) the same as the distance between the second layer 522 of the second lighting element and the dividing plane.

[0077] The first layer 521 of the second lighting element can be configured to emit light with different colors and / or color temperatures to the second layer 522 of the second lighting element.

[0078] In some instances, the distance d between the first plane p1 and the second plane p2 is between 1 cm and 15 cm, preferably between 2 cm and 10 cm.

[0079] In some instances, the minimum distance d between any of the second illumination elements and the diffuser in a direction parallel to the axis of the first beam is... s The distance between the first plane p1 and the second plane p2 is not greater than the distance d between them. The distance between the first plane p1 and the second plane p2 can be denoted as the inter-plane distance d. More preferably, in a direction parallel to the axis of the first beam, the minimum distance d between any of the second illumination elements and the diffuser. s It is no greater than half the distance d between the first plane p1 and the second plane p2 (i.e., 0.5d).

[0080] The sag h of the diffuser's cross-sectional shape in any half of the plane defined by the first beam axis and containing the second beam axis is between 0.6 and 1.4 times the distance d between the first and second planes, i.e., between 0.6 and 1.4 times the distance d between the planes. This method improves the uniformity or homogeneity of the light distribution and light mixing emitted by the first and second layers of the second illumination elements in the array of second illumination elements.

[0081] Therefore, the ratio L (i.e., h / d) between the sag h and the distance d between the planes can have a value between 0.6 and 1.4 (inclusive), i.e., 0.6 ≤ L ≤ 1.4. More preferably, the ratio L has a value between 0.8 and 1.2 (inclusive), and even more preferably, a value between 0.9 and 1.1 (inclusive). The closer the value of L is to 1, the better the uniformity or homogeneity of the light distribution and light mixing of the light emitted by the first and second layers of the second illumination elements in the array of second illumination elements.

[0082] Figure 8 A cross-sectional view of an alternative luminaire 800 is provided. Elements of the luminaire 800 that are similar to or the same as those previously described and identified have the same reference numerals and are not described in detail for the sake of brevity.

[0083] Alternative lighting fixtures 800 and see also Figures 1 to 4 The difference in the described luminaire is that luminaire 800 also includes an array 810 of third lighting elements.

[0084] An array 810 of third lighting elements surrounds the central portion of the luminaire (i.e., around the first lighting elements) and is configured to emit light in a direction toward the first beam axis X1. Therefore, the distance between any photon of the light emitted by each third lighting element and the first beam axis X1 will (at least initially) decrease over time, for example, until it crosses the first beam axis X1.

[0085] Preferably, the light emitted by each third illumination element is centered on the corresponding third beam axis Y2, wherein each third beam axis forms an angle between 45º and 90º with the first beam axis. Therefore, the angle between each third beam axis Y2 and each second beam axis Y1 is between 90º and 180º.

[0086] More preferably, the angle between each third beam axis Y2 and the first beam axis X1 is between 60º and 90º, more preferably between 80º and 90º, and even more preferably between 89º and 90º (e.g., 90º).

[0087] In a preferred embodiment, the array 120 of the second lighting elements and the array 810 of the third lighting elements are mounted on the same heat sink 125. This significantly reduces the material cost and weight of the luminaire 800.

[0088] Therefore, the heat sink 125 can be a heat sink surrounding or encircling a central portion (i.e., the first lighting element), on which the array 120 of the second lighting element and the array 810 of the third lighting element are mounted. The array of the second lighting element emits light outward from the heat sink 125 (i.e., outward from the luminaire). The array 810 of the third lighting element emits light inward relative to the heat sink 125 (i.e., inward from the luminaire).

[0089] like Figure 8 As shown, the light emitting plate 111 of the first illumination element 110 is preferably disposed between the first light source 115 and the array 810 of the third illumination elements. Therefore, when illuminating the environment, the light emitted by the array of the third illumination elements is not modified or altered by the light emitting plate.

[0090] The third lighting element may include an LED configured to emit warm white light with a color temperature between 2500K and 3500K and / or cool white light with a color temperature between 5500K and 7000K. In a preferred embodiment, each third lighting element is configured to produce light with a color temperature between 4000 Kelvin and 5500 Kelvin. This simulates the brightness of a sun-illuminating surface to increase the illusion that the luminaire is a real skylight.

[0091] Figure 9 A cross-sectional view of an alternative luminaire 900 is provided. Elements of the luminaire 900 that are similar to or the same as those previously described and identified have the same reference numerals and are not described in detail for the sake of brevity.

[0092] Alternative lighting fixtures 900 and see also Figures 5 to 7 The difference between the described luminaire 500 and the luminaire 900 is that the luminaire 900 also includes an array 810 of third lighting elements.

[0093] Therefore, the alternative luminaire 900 includes an array 520 of second lighting elements (including two or more layers 521, 522 of second lighting elements) and an array 810 of third lighting elements.

[0094] As previously explained, any luminaire described herein may include mounting element 405 configured for mounting the luminaire to a surface such as a ceiling.

[0095] Figure 10 A luminaire 100 is shown in the process of being installed, illustrating optional features and elements of mounting element 405. These features can form part of any luminaire disclosed herein.

[0096] Preferably, the mounting element 405 includes a component for connecting the mounting element 405 to the remainder of the luminaire (e.g., a support plate). Figure 10The clamping mechanism 1050 (not visible in the image) may include, for example, a twisting latching mechanism.

[0097] One difficulty in using this clamping mechanism to install light fixtures is the risk of the fixture part (i.e., the part excluding the mounting elements) falling off, which could damage the lighting components. This is particularly problematic when installing the fixture to a ceiling. Furthermore, using a twist-lock mechanism is easier for the installer if the twisting action can be performed using both hands.

[0098] To mitigate the risk of the light fixture (partially) falling, mounting components may include one or more safety cable clips 1010. Support plate (in...) Figure 10 (Not visible in the image) may include one or more safety cables 1020 connected to the respective safety cable clamp 1010 to secure the mounting element 405 to the support plate (e.g., temporarily) before using the clamping mechanism.

[0099] Thus, during the installation of the luminaire 100, before the support plate is engaged to the mounting element using the clamping mechanism, the mounting element can be positioned against the surface, and each safety cable 1020 can be engaged with the corresponding safety cable clip 405 (to reduce the risk of the luminaire falling or being damaged during installation).

[0100] By studying the accompanying drawings, this disclosure, and the appended claims, those skilled in the art can understand and implement variations of the disclosed embodiments in practicing the claimed invention. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality.

[0101] The mere fact that certain measures are described in mutually different dependent claims does not imply that a combination of these measures cannot be used advantageously.

[0102] If the term "suitable" is used in the claims or description, it should be noted that the term "suitable" is intended to be equivalent to the term "configured as". If the term "arranged" is used in the claims or description, it should be noted that the term "arranged" is intended to be equivalent to the term "system", and vice versa.

[0103] Any reference symbols in the claims should not be construed as limiting the scope.

Claims

1. A lighting fixture (100, 500, 800, 900), comprising: A first lighting element (110) occupies the central portion of the luminaire and is configured to emit light, wherein the light emitted by the first lighting element is centered on a first beam axis (X1), and the first lighting element includes a light output surface (112) and a first light source (115) configured to illuminate the light output surface (112). An array (120, 520) of second lighting elements surrounds the central portion of the luminaire and is configured to emit light in a direction away from the first beam axis, wherein the light emitted by each second lighting element is centered on the corresponding second beam axis (Y1), wherein each second beam axis forms an angle between 45º and 90º with the first beam axis; A diffuser (130) surrounds an array of the second illumination elements and is configured to receive light emitted by the array of the second illumination elements; and The array of the second illumination elements includes a first layer (521) of the second illumination elements located in a first plane (p1) orthogonal to the axis of the first beam. And a second layer (522) of a second illumination element located in a second plane (p2) orthogonal to the axis of the first beam, and the second plane being parallel to the first plane.

2. The lighting fixture according to claim 1, wherein, The diffuser has a curved cross-sectional shape in any half-plane defined by the first beam axis and containing any second beam axis.

3. The lighting fixture according to claim 2, wherein, The cross-sectional shape of the diffuser in any half-plane defined by the first beam axis and containing any second beam axis is an arc-shaped segment or an annular segment.

4. The lighting fixture according to claim 1, wherein, The first layer of the second lighting element emits light of different colors and / or color temperatures to the second layer of the second lighting element.

5. The lighting fixture according to claim 1, wherein, In a direction parallel to the axis of the first beam, the minimum distance (d) between any of the second illumination elements and the diffuser. s The distance between the first plane and the second plane is not greater than half of the distance between them.

6. The luminaire according to any one of claims 1 to 5, wherein, The sag (h) of the cross-sectional shape of the diffuser in any half-plane defined by the first beam axis and containing the second beam axis is between 0.6 and 1.4 times the distance between the first plane and the second plane.

7. The luminaire according to any one of claims 1 to 6, further comprising an array (810) of third lighting elements surrounding a central portion of the luminaire and configured to emit light in a direction toward the first beam axis.

8. The luminaire according to claim 7, wherein, The light emitted by each third illumination element is centered on the corresponding third beam axis, wherein each third beam axis forms an angle between 45º and 90º with the first beam axis.

9. The luminaire according to any one of claims 7 or 8, wherein, The array of the second lighting element and the array of the third lighting element are mounted on the same heat sink.

10. The luminaire according to claim 9, wherein, The heat sink includes a tubular element surrounding the central portion of the luminaire.

11. The luminaire according to any one of claims 1 to 10, wherein, The first lighting element includes: A light emitting plate (111) includes a light output surface (112) from which light is emitted from the first illumination element; and The first light source (115) is configured to illuminate the entire light output surface.

12. The luminaire according to claim 11, wherein, The size of the light output surface is not less than 100 cm. 2 .

13. The luminaire according to any one of claims 1 to 12, wherein, The first illumination element is configured to emit light with a wavelength between 400 nm and 500 nm.

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