Light generating system with triangular light guide panel

Abstract

The invention provides a light generating system (1000) comprising a lighting device (100) having a triangular light guide panel (130) and a light source device (110), where: the triangular light guide panel (130) comprises a first triangular face (136) and a second triangular face (139), where the triangular light guide panel (130) further comprises a first side (131), a second side (132) and a third side (133), the first side (131), the second side (132) and the third side (133) bridge a distance (d1) between the first triangular face (136) and the second triangular face (139), wherein the first side has a first length (L1); a light source arrangement (110) comprising a plurality of light sources (10) configured in an array (115) aligned with the first side (131), where the light sources (10) are configured to provide light source light (11) having a luminous flux, where the light sources (10) comprise solid state light sources; the triangular light guide panel (130) comprises a light out-coupling element (120), wherein the light out-coupling element (120) is arranged in the triangular light guide panel (130), and / or on a first triangular face (136), and / or on a second triangular face (139); and wherein the light out-coupling element (120) is configured to facilitate light out-coupling from the triangular light guide panel (130); the light source arrangement (110) and the triangular light guide panel (130) are configured such that, in a first mode of operation of the light generating system (1000), (a) at least a portion of the light source light (11) enters the triangular light guide panel (130) via the first side (131) to provide coupled light source light (12), where the triangular light guide panel (130) is configured to guide the coupled light source light via total internal reflection, and (b) at least a portion of the coupled-in light source light (12) is coupled out of the triangular light guide panel (130) via the first triangular face (136); the density of the optical decoupling elements (120) increases as the normal distance (ND) from the first side surface (131) increases; and in a first operating mode, the light source light (11) incident on the first side (131) has a luminous flux gradient of at least 20% along the first length (L1).

Description

Technical Field

[0001] The present invention relates to a light generating system comprising a triangular light guide panel and an indoor space accommodating the light generating system. Background Art

[0002] Light generating systems are known in the art. For example, US20080037284A1 describes a modular lighting system comprising light-emitting tile modules, each module comprising a light-guiding substrate, at least one illumination source optically coupled to the light-guiding substrate, and an interconnection device connecting one light-emitting tile module to another light-emitting tile module. The interconnection device may include mechanical and / or electrical components. Multiple modules can be connected to create an extended, continuously extended lighting system. In one embodiment, the light-guiding substrate of one module extends above the illumination source of an adjacent module. In another embodiment, the light-guiding substrate may be textured to produce a patterned area with higher light extraction. In another embodiment, the illumination source may be included in a separate electrical component. The illumination source may include an LED guided into the edge of the light-guiding substrate. Summary of the Invention

[0003] A recent trend in general lighting may be the use of light guide panels (LGPs). LGP-based luminaires typically include a light guide arranged between a reflector and a diffuser. LED light, typically emitted from an LED strip, is coupled into the light guide at the edge and then guided by total internal reflection until it is coupled out at the main surface of the light guide using a light outcoupling device on or in the light guide (e.g., using a matrix of reflective dots).

[0004] Typically, it may be desirable for an LGP to provide (relatively) uniform illumination from its primary surface. Prior art may describe square LGPs as having (relatively) uniform illumination. However, for other LGP shapes, such as triangular LGPs, providing uniform illumination and / or high illumination efficiency may be challenging. This may limit the application of LGP-based luminaires.

[0005] Therefore, it may be desirable to improve the performance and / or functionality of LGP-based luminaires.

[0006] Therefore, one aspect of the present invention is to provide an alternative light generating system which preferably further at least partially obviates one or more of the above disadvantages.It is an object of the present invention to overcome or ameliorate at least one disadvantage of the prior art, or to provide a useful alternative.

[0007] According to a first aspect, the present invention provides a light generating system (or "system") comprising a lighting device having a triangular light guide panel and a light source arrangement. In an embodiment, the triangular light guide panel may comprise a first triangular face and a second triangular face. In particular, the triangular light guide panel may further comprise a first (rectangular) side, a second (rectangular) side and a third (rectangular) side. The first side, the second side and the third side may in particular bridge the distance d1 between the first triangular face and the second triangular face. In an embodiment, the first side may have a first length L1, in particular along the elongation axis. In a further embodiment, the light source arrangement may comprise a plurality of light sources configured in an array, in particular wherein the array is aligned with the first side. In particular, in an embodiment, the first side may be configured to be in a light receiving relationship with the light source, in particular in an operating mode of the light generating system (see below). In a further embodiment, the light source may be configured to provide light source light having a luminous flux. In an embodiment, the triangular light guide panel may comprise a light outcoupling element. In particular, the light outcoupling element may be arranged in the triangular light guide panel, on the first triangular face and / or on the second triangular face. In particular, the light outcoupling element can be configured to facilitate the outcoupling of light from the triangular light guide panel, in particular via the first triangular face. In further embodiments, the light source device and the triangular light guide panel can be configured so that in the first operating mode of the light generating system, at least a portion of the light source light enters the triangular light guide panel via the first side face to provide coupled-in light source light, in particular wherein the triangular light guide panel is configured to guide the coupled-in light source light via total internal reflection. Furthermore, the light source device and the triangular light guide panel can be configured so that in the first operating mode of the light generating system, at least a portion of the coupled-in light source light is outcoupled from the triangular light guide panel via the first triangular face, and in particular (also) outcoupled via the light outcoupling element. Furthermore, in an embodiment, the density of the light outcoupling elements can increase with increasing normal distance from the first side face. In further embodiments, in the first operating mode, the light source light incident on the first side face can have a luminous flux gradient of at least 20% along the first length L1.

[0008] Therefore, in a specific embodiment, the present invention may provide a light generating system, which includes a lighting device having a triangular light guide panel and a light source device, wherein: the triangular light guide panel includes a first triangular face and a second triangular face, wherein the triangular light guide panel also includes a first side face, a second side face and a third side face, the first side face, the second side face and the third side face bridge the distance d1 between the first triangular face and the second triangular face, wherein the first side face has a first length L1; the light source device includes a plurality of light sources, which are configured as an array aligned with the first side face, wherein the light sources are configured to provide light source light with a luminous flux; the triangular light guide panel includes a light out-coupling element, wherein the light out-coupling element is arranged in the triangular light guide panel, the first side face, and the third side face. triangular face and / or a second triangular face, and wherein the light outcoupling elements are configured to facilitate outcoupling of light from the triangular light guide panel; the light source device and the triangular light guide panel are configured so that in a first operating mode of the light generating system, (a) at least a portion of the light source light enters the triangular light guide panel via the first side face to provide coupled-in light source light, wherein the triangular light guide panel is configured to guide the coupled-in light source light via total internal reflection, and (b) at least a portion of the coupled-in light source light is coupled out of the triangular light guide panel via the first triangular face; the density of the light outcoupling elements increases with increasing normal distance from the first side face; and in the first operating mode, the light source light incident on the first side face has a luminous flux gradient of at least 20% along the first length L1.

[0009] With such a light generating system, system light with (relatively) uniform (or "uniform") brightness and / or (relatively) high efficiency, eg, uniform brightness with high efficiency, may be provided from the triangular light guide panel.

[0010] The present invention also relates to hinged triangular light guide panels with uniform brightness and high efficiency. Multiple (e.g., 2) hinged triangular light guide panels can be arranged in a rectangular (e.g., square) configuration, and ultimately the multiple rectangular configurations can be arranged in columns. An elongated PCB with multiple LEDs can typically be arranged on one side that is not hinged. The present invention also relates to a flexible, connectable light guide panel with a hinge structure. For example, a light generating system may include multiple luminaires, each of which is square or rectangular and includes two triangular parts, each part including an LED strip and an LGP (and a reflector at one major surface of the LGP) (and a diffuser at the other major surface of the LGP). The two triangular parts can be connected via a hinge located at the diagonal of the luminaire. For example, at least one side surface of each triangular part (typically an opposing side surface of the luminaire) may include a connector for mechanically connecting to another luminaire. Such a connector may be another hinge, for example, arranged at a 45-degree angle relative to the hinge.

[0011] Therefore, the present invention may provide a light generating system comprising a lighting device. The lighting device may particularly comprise a triangular light guide panel and a light source device.

[0012] The term “light guide panel” (also “light guide plate”) may herein refer to a structure configured to guide light, in particular light from a light source, the structure having a plate-like shape, ie, relatively thin compared to its length and width.

[0013] In particular, the lighting device may comprise a triangular light guide panel, ie a light guide panel having a first triangular face and a second triangular face, in particular wherein the second triangular face is aligned with the first triangular face and is arranged opposite the first triangular face.

[0014] The first triangular face (and the second triangular face) may be approximately triangular in shape. For example, the first triangular face (and the second triangular face) may have a triangular shape, but may have rounded corners. In certain embodiments, the first triangular face (and the second triangular face) may have a triangular shape.

[0015] The term "approximately" and its variations (such as "approximate shape") in this document refers to almost identical to, in particular identical to, for example almost identical to a triangle. For example, a triangular face could define a triangle, but there are defects. In particular, an object that approximates a first shape may refer in this document to: a first shape realization that encloses an object, wherein the first shape realization is defined as a minimum enclosing shape of the (2D or 3D, respectively) object, wherein the first shape realization has the shape of the first shape, wherein the ratio of the area (volume) of the first shape realization to the area (volume) of the object is ≤1.2, in particular ≤1.1, such as ≤1.05, in particular ≤1.02. For example, a triangular face may be approximated to a triangular shape, wherein the first shape realization may be defined as a minimum enclosing half-triangular shape of the triangular face, wherein the ratio of the volume of the first shape realization to the volume of the triangular face is ≤1.1, in particular ≤1.05, such as ≤1.01, including 1. Furthermore, if the dimensions of the first shape are defined, the term approximately may mean that the object and the first shape are overlappable (in 2D or 3D, respectively) such that the intersection between the object and the first shape covers at least n% of the object and at least n% of the shape, where n is at least 90%, such as at least 95%, in particular at least 98%, such as at least 99%, including 100%.

[0016] In an embodiment, the triangular light guide panel may further include a first (rectangular) side, a second (rectangular) side, and a third (rectangular) side. The first, second, and third sides may specifically bridge the distance d1 between the first triangular face and the second triangular face. Distance d1 may also be referred to herein as the "thickness" of the triangular light guide panel.

[0017] In an embodiment, the first side surface may have a first length L1, in particular a first length L1 along the elongation axis (of the first side surface). In particular, the first side surface may have a first length L1 perpendicular to the distance d1 (or "thickness"), in particular where L1 is ≥ 5*d1, for example ≥ 10*d1, in particular ≥ 20*d1. In other embodiments, L1 is ≤ 300*d1, for example ≤ 100*d1.

[0018] The triangular light guide panel may also have, in particular, a maximum width W perpendicular to the first side (ie, perpendicular to the first length L1 and the distance d1 ). Max In an embodiment, W Max It can be selected from the range of 0.1*L1-10*L1, such as the range of 0.2*L1-5*L1, especially the range of 0.5*L1-2*L1. In another embodiment, W Max It can be selected from the range of 0.8*L1-1.2*L1, for example, from the range of 0.9*L1-1.1*L1. In particular, in the embodiment, L1 and W Max Can be (essentially) equal.

[0019] In an embodiment, the triangular light guide panel may include a light outcoupling element. The light outcoupling element may be configured to facilitate the outcoupling of light from the triangular light guide panel, in particular the outcoupling of (incoupled) light from the light source. In an embodiment, (at least a portion) of the light outcoupling element may be arranged in the triangular light guide panel, and / or on the first triangular face, and / or on the second triangular face, in particular (at least a portion) of the light outcoupling element may be arranged in the triangular light guide panel, or in particular (at least a portion) of the light outcoupling element may be arranged on the first triangular face, or in particular (at least a portion) of the light outcoupling element may be arranged on the second triangular face. Therefore, the light outcoupling elements may be distributed on and / or in the light guide. In fact, the light outcoupling element may be conveniently arranged on the first triangular face and / or the second triangular face, in particular (at least) on the second triangular face.

[0020] In an embodiment, the light outcoupling elements may include reflective points and / or scattering features. In such an embodiment, the light outcoupling elements may be arranged on the second triangular facet. They may be applied by printing, dispensing, or laser modification. The light outcoupling elements may be arranged on the second triangular facet such that a majority of the coupled-in light is coupled out of the light guide panel via the first triangular facet.

[0021] In an embodiment, the light source arrangement may comprise (a plurality of) light sources. The light sources may in particular be configured as an array, such as an array aligned with the first side. In an embodiment, the array may comprise a single row of light sources, i.e. the array may comprise a 1×N array. In a further embodiment, the array may comprise multiple rows of light sources, i.e. the array may comprise an M×N array. For example, in an embodiment, the light source may comprise an LED light source, wherein the LED light sources are arranged into an LED array. In an embodiment, the light sources may be arranged at a constant pitch, in particular along the first length. However, in a further embodiment, the light sources may be arranged at a varying pitch, in particular along the first length. The light source may in particular be configured to provide light source light having a luminous flux. Specifically, in an embodiment, the light source may be configured to provide light source light to the first side, i.e. the first side may be configured to be in a light receiving relationship with the light source.

[0022] In particular, the light source array is an elongated array.The light sources may be configured to provide light source light to the first side, wherein at least 70%, such as at least 80%, more in particular at least 85% of the area of the first side receives light source light.

[0023] In embodiments, the light source may comprise a solid state light source, in particular a light emitting diode (LED).Thus, in embodiments, the light source arrangement may comprise LED(s), in particular wherein the LEDs are arranged in an array, eg an array aligned with the first side.

[0024] The lighting device, in particular the light source device and the triangular light guide panel can be configured such that, in a first operating mode of the light generating system, at least a portion of the light source light enters the triangular light guide panel via the first side surface to provide incoupled light source light, in particular wherein the triangular light guide panel is configured to guide the incoupled light source light via total internal reflection. Furthermore, in an embodiment, the lighting device, in particular the light source device and the triangular light guide panel can be configured such that, in the first operating mode of the light generating system, at least a portion of the incoupled light source light is outcoupled from the triangular light guide panel via the first triangular face, in particular via a light outcoupling element. Thus, during the first operating mode, the light generating system can be configured to provide system light from the first triangular face, in particular wherein the system light includes (at least a portion of) the outcoupled light source light.

[0025] Therefore, the light generation system can have a (first) operating mode. In particular, the light generation system can include a control system, wherein the control system has an operational mode. The term "operational mode" can also be expressed as a "control mode". A system, or an apparatus or device (see also below) can perform an action in a "mode" or "operational mode" or "operational mode". Similarly, in a method, an action, phase or step can be performed in a "mode" or "operational mode" or "operational mode". This does not exclude that the system, apparatus or device can also be adapted to provide another operating mode, such as a second operating mode or multiple other operating modes. Similarly, this does not exclude that one or more other modes can be executed before and / or after the execution mode. However, in an embodiment, a control system (see also below) can be available that is adapted to at least provide an operational mode. If other modes are available, the selection of these modes can be performed in particular via a user interface, although other options (such as executing the mode based on sensor signals or (time) schemes) are also possible. In embodiments, an operating mode may also refer to a system, device, or apparatus that is only capable of operating in a single operating mode (ie, "on," with no further tunability).

[0026] Therefore, in an embodiment, the light generating system may comprise a control system. The control system may be configured to control the light source.

[0027] The term "control" and similar terms herein may particularly refer to at least determining the behavior of an element or supervising the operation of an element. Therefore, "control" and similar terms here may, for example, refer to imposing an action on an element (determining the action or supervising the operation of an element), such as measuring, displaying, actuating, opening, shifting, changing the temperature, etc. In addition, the term "control" and similar terms may also include monitoring. Therefore, the term "control" and similar terms may include imposing an action on an element as well as imposing an action on an element and monitoring an element. The control of an element can be accomplished using a control system. The control system and the element can therefore be functionally coupled at least temporarily or permanently. The element may include a control system. In an embodiment, the control system and the element may not be physically coupled. Control may be accomplished by wired and / or wireless control. The term "control system" may also refer to a plurality of different control systems, which are particularly functionally coupled, and wherein, for example, a master control system may be the control system and one or more other control systems may be slave control systems.

[0028] As described above, in embodiments, the triangular light guide panel may include light outcoupling elements.

[0029] In a further embodiment, the density of the light outcoupling elements may increase with increasing normal distance from the first side, in particular along at least 80% of the (local) width of the triangular light guide panel, such as along at least 90%. The increase in the density of the outcoupled light with increasing normal distance from the first side may result in an increase in the proportion of the light source light outcoupled from the triangular light guide panel with increasing normal distance from the first side. Thus, the increased density of the light outcoupling elements may account for a decrease in the amount of light arriving with increasing normal distance to the first side (because more and more light has been coupled out as the distance increases).

[0030] The term "density" in the phrase "density of optical outcoupling elements" herein may refer to a proportion of an area (or volume) covered (or occupied) by the optical outcoupling elements. Thus, increasing the number of optical outcoupling elements with increasing normal distance from the first side surface may be achieved by increasing the size of the optical outcoupling elements and / or by increasing the number of optical outcoupling elements.

[0031] Therefore, in an embodiment, the size of the light outcoupling elements may increase with increasing normal distance from the first side surface, and in particular, the number of light outcoupling elements may be constant or increase with increasing normal distance from the first side surface.

[0032] In another embodiment, the number of light outcoupling elements may increase with increasing normal distance from the first side surface. In particular, the size of the light outcoupling elements may remain constant or increase with increasing normal distance from the first side surface.

[0033] In particular, with reference to embodiments in which (at least part of) the light outcoupling element is arranged on the second triangular facet (or the first triangular facet), the proportion of the area of the second triangular facet covered by the light outcoupling element can increase with increasing normal distance to the first side face. Furthermore, with reference to embodiments in which the light outcoupling element is arranged in a triangular light guide panel, the proportion of the volume of the triangular light guide panel occupied by the light outcoupling element can increase with increasing normal distance to the first side face.

[0034] The phrase "normal distance to the first side" refers to the Euclidean distance between a point and the first side, ie, the distance measured between the first side and the point along a line perpendicular to the first side.

[0035] In certain embodiments, the density of the optical outcoupling elements can be varied via the size of the optical outcoupling elements or one or more of the multiple optical outcoupling elements, in particular wherein (at least part of) the optical outcoupling elements are arranged on the second triangular face, and in particular wherein at least part of the coupled-in light from the light source is coupled out from the triangular light guide panel via the optical outcoupling elements and the first triangular face.

[0036] In another embodiment, particularly in the first operating mode, the light source light incident on the first side may have a luminous flux gradient of at least 10% along the first length L1, for example, at least 20% along the first length L1. The term "luminous flux gradient" herein may refer to an increase or decrease in luminous flux. Therefore, the phrase "a luminous flux gradient of at least 10% along the first length L1" herein refers to a luminous flux that increases (or decreases) by at least 10% along the first length L1. In another embodiment, particularly in the first operating mode, the light source light incident on the first side may have a luminous flux gradient of at least 30% along the first length L1, for example, at least 40% along the first length L1. In a specific embodiment, particularly in the first operating mode, the light source light incident on the first side may have a luminous flux gradient of 30-50% along the first length L1.

[0037] The luminous flux gradient may be an increasing gradient or a decreasing gradient. However, there may also be two or more gradients, for example up to about four gradients, such as two gradients. Thus, in an embodiment, the two gradients may have a mutual maximum value somewhere between greater than 0> L1 and less than L1.

[0038] In other embodiments, particularly in the first operating mode, the light source light incident on the first side surface may have two light flux gradients along the first length L1 of at most 100%, such as at least 30%, more particularly at least 40%, along the first length L1. In further embodiments, particularly in the first operating mode, the light source light incident on the first side surface may have two light flux gradients along the first length L1 of at most 100%, such as at most about 90%, such as at most 80%, such as at most 70%, along the first length L1. In specific embodiments, particularly in the first operating mode, the light source light incident on the first side surface may have two light flux gradients along the first length L1 of 30-100%, such as 30-100%, such as 40-100%, such as in specific embodiments 40-90%, such as at least 50%, along the first length L1.

[0039] In such an embodiment, the luminous flux gradient can be varied by varying one or more of the pitch between the light sources in the array and the flux output of the light sources in the array. For example, along the luminous flux gradient, the pitch between the light sources can increase (or decrease) between light sources arranged consecutively along the first length L1. Additionally or alternatively, along the luminous flux gradient, particularly in the operational mode, the flux output of the light sources can increase (or decrease) between light sources arranged consecutively along the first length L1.

[0040] In an embodiment, for example, along a 20% luminous flux gradient of the first length L1, a plurality of light sources, particularly LEDs, may be arranged to provide light source light, for example, at least three LEDs or at least five LEDs. Thus, the luminous flux gradient may be provided by the combined light source light of a plurality of light sources, for example, a plurality of LEDs, particularly at least three light sources, for example, at least five light sources.

[0041] For example, in an embodiment, for at least n light sources arranged consecutively along a first length L1, it is suitable that the light source distance between two consecutively arranged light sources in each group (of the n light sources) increases along a first direction (parallel to the first length L1). Similarly, in another embodiment, in an operating mode, for at least n light sources arranged consecutively along the first length L1, it is suitable that the flux output increases consecutively along the n light sources. In an embodiment, n can be selected from the range of 4-100, such as the range of 10-70, in particular the range of 20-60. In another embodiment, n can be at least 5, such as at least 10.

[0042] Therefore, in an embodiment, the light source pitch p (eg, LED pitch) in the array may vary along the first length L1. In particular, the light source pitch p may vary along the first length L1 to provide a light flux gradient.

[0043] In a further embodiment, in the first operating mode, the light generating system may be configured to vary the current provided to the light source along the first length L1 , in particular to provide a luminous flux gradient.

[0044] The luminous flux gradient can (at least partially) account for the varying width W1 of the triangular light guide panel. That is, the luminous flux received by the first side can generally increase as the width along the first length L1 increases. However, to account for reflections of the source light at the second and third sides (see also below), the luminous flux can advantageously decrease toward the end of the first side, even if the width W1 still increases. In particular, the variation in the luminous flux of the source light on the first side can lead to efficient generation of system light.

[0045] In further embodiments, along the first length L1, the luminous flux may vary according to a unimodal distribution. Thus, the profile of the luminous flux received by the first side relative to the position along the first length L1 may be similar to a unimodal distribution, i.e., a distribution having a single local maximum. In particular, in embodiments, the luminous flux, in particular the approximate unimodal distribution, may have a peak positioned between the second side and a central position along the first length L1. In other embodiments, the first side may have a (first) corner shared with the third side, and the luminous flux (in particular the unimodal distribution) may be skewed towards the (first) corner, i.e., the unimodal distribution may have a longer tail towards the (first) corner than towards the second corner shared between the first and second sides.

[0046] Thus, the peak of the unimodal distribution may be positioned between the second side and a central position along the first length L1 .

[0047] In particular, in an embodiment, the peak (or "maximum position") of the unimodal distribution can be arranged at a distance d2 from the second side, in particular from the second corner arranged between the first side and the second side, where d2 is selected from the range of 0.1*L1-0.48*L1, for example, the range of 0.2*L1-0.45*L1.

[0048] In an embodiment, the first side surface and the third side surface may be at a (first) angle α 13 The first side and the second side may be arranged at a (second) angle α 12 Arrangement. In particular, α 12 ≥α 13 , such as >α 13 In another embodiment, α 13 It can be selected from the range of 10°-90°, such as from the range of 30°-60°, and particularly from the range of 40°-50°. 13 It can be <90°, for example ≤60°. In the embodiment, α 13 In particular, α may be (approximately) 45°. In a further embodiment, α 12 It can be selected from the range of 30°-130°, such as the range of 50°-120°, in particular the range of 70°-110°, such as the range of 80°-100°. In particular, in the embodiment, α 12 It can be (approximately) 90°. Therefore, in an embodiment, the triangular light guide panel can have a right angle between the first side and the second side. Furthermore, in an embodiment, the second side and the third side can be at a (third) angle α 23 Arrangement, especially where α 12 ≥α 23 In another embodiment, α 23 It can be selected from the range of 10°-90°, such as the range of 30°-60°, especially the range of 40°-50°. 13 It can be <90°, for example ≤60°. In the embodiment, α 23 It may especially be (approximately) 45°.

[0049] Therefore, in the embodiment, α 13 and α 23 can be the same angle, i.e., in an embodiment, the triangular light guide panel can be shaped according to an isosceles triangle. In another embodiment, α 12 can be 90° and α 13 and α 23They may all be 45°, ie, in an embodiment, the triangular light guide panel may be shaped according to an isosceles right triangle.

[0050] In another embodiment, α 12 , α 13 and α 23 Two such triangular light guide panels can conveniently be combined (via corresponding hinge means; see below) to provide a rectangular shape, which may in practice be convenient, especially when providing a hinge means with more than two triangular light guide panels.

[0051] In another embodiment, α 12 , α 13 and α 23 Each is ≥10°, for example ≥30°.

[0052] In other embodiments, the second side may have a second length L2 (along the corresponding second elongation axis), wherein 0.5≤L1 / L2≤2, in particular 0.7≤L1 / L2≤1.5. In other embodiments, 0.9≤L1 / L2≤1.1, for example 0.98≤L1 / L2≤1.02, in particular L1=L2.

[0053] In other embodiments, the third side may have a third length L3, in particular where L3>L1, for example L3≥1.1*L1, in particular ≥1.2*L1, for example ≥1.4*L1. In other embodiments, L3 is ≤1.6*L1, for example ≤1.5*L1, for example ≤1.41*L1.

[0054] The light generating system may be configured to provide system light (substantially) only from the first triangular facet.Thus, the light generating system (in particular the triangular light guide panel) may comprise one or more reflectors configured to reflect light source light (backwards) into the triangular light guide panel.

[0055] Specifically, the light generating system, in particular the triangular light guide panel, may include a (second) side reflector, in particular wherein the (second) side reflector is arranged downstream of the second side, and wherein the side reflector is configured to reflect the light source light, in particular to reflect the light source light (back) into the triangular light guide panel (at the second side). Specifically, the (second) side reflector may be configured to reflect at least a portion of the light source light that has escaped from the (second) side (via the (second) side) back into the triangular light guide panel.

[0056] In particular, the presence of the (second) side reflector and the (third) side reflector may significantly increase the efficiency of the light generating system.

[0057] In another embodiment, the light generating system, in particular the triangular light guide panel, may include a triangular facet reflector, in particular wherein the triangular facet reflector is arranged downstream of the second triangular facet, and wherein the triangular facet reflector is configured to reflect the light source light, in particular to reflect the light source light (back) into the triangular light guide panel (at the second triangular facet). In this way, substantially all the light source light coupled out of the triangular light guide panel will escape via the first triangular facet. Or, in other words, substantially all the light escaping from the system can escape from the triangular light guide panel via the first triangular facet.

[0058] In another embodiment, the light generating system, in particular the triangular light guide panel, may include a (third) side reflector, in particular wherein the side reflector is arranged downstream of the third side, and wherein the side reflector is configured to reflect the light source light, in particular to reflect the light source light (back) into the triangular light guide panel (at the third side). Specifically, the (third) side reflector may be configured to reflect at least a portion of the light source light that has escaped from the (third) side (via the (third) side) back into the triangular light guide panel.

[0059] In particular, one or more reflectors, in particular (at least) the second side reflector, or in particular (at least) the third side reflector, or in particular (at least) the triangular face reflector, may have a reflectivity of at least 70%, for example at least 80%, in particular at least 90%, for example at least 95%, including 100%, for light from the light source.

[0060] In an embodiment, the density of the light outcoupling elements may (also) vary in a cross section parallel to the first side surface, that is, the density of the light outcoupling elements may (also) vary in a direction parallel to the first side surface.

[0061] Due to reflection of the light source light at the third side, for example, due to a third side reflector, there may be a locally elevated level of light source light near the third side. Therefore, in an embodiment, the density of the light outcoupling elements can decrease as the distance from the third side decreases in a direction parallel to the first side. Thus, as the distance from the third side (in a direction parallel to the first side) decreases, the proportion of the light source light outcoupled (via the light outcoupling elements) can decrease, thereby addressing the locally elevated level of light source light.

[0062] Similarly, especially where α 12 In embodiments where the angle is less than 90°, the density of the light outcoupling elements can decrease as the distance from the second side decreases in a direction parallel to the first side. Thus, the light generating system can account for localized increases in the amount of light from the source due to reflections from the second side.

[0063] Therefore, in an embodiment, the density of the light outcoupling elements can increase with increasing normal distance from the first side surface, and can decrease with decreasing distance from the third side surface (and / or the second side surface) in a direction parallel to the first side surface. This variation in point density can substantially improve the uniformity (or "homogeneity") of the light from the light source coupled out via the first triangular facet.

[0064] In particular, in an embodiment, the luminous flux of the outcoupled light source light (coupled out via the first triangular facet) can vary within 20% of the average value of the average luminous flux of the light source light coupled out via the first triangular facet (averaged over the light source light coupled out via the first triangular facet), for example within 10% of the average value, in particular within 3% of the average value.

[0065] In another embodiment, the light generating system, in particular the triangular light guide panel, may include a diffuser. The diffuser may in particular be arranged downstream of the first triangular facet. Specifically, in an embodiment, the triangular light guide panel may be arranged (or "sandwiched") between the diffuser (arranged on the side of the first triangular facet) and the triangular reflector (arranged on the side of the second triangular facet).

[0066] According to optical modeling, a triangular light guide cut from a square light guide with only a flux gradient can result in (i) high efficiency (~70%) but (ii) (relatively) poor uniform brightness. Furthermore, if the density of light outcoupling elements is provided as described herein (increasing with increasing normal distance to the first side and decreasing with decreasing distance to a third side parallel to the first side), but with a constant flux, reasonably uniform brightness is achieved, but with low efficiency. Surprisingly, the combination of these approaches provides both high efficiency and uniform brightness. In particular, the brightness uniformity using the combined approach is higher than that achieved with varying density of light outcoupling elements alone.

[0067] Thus, in various embodiments, the light generating system may comprise a (third) side reflector, wherein the side reflector is arranged downstream of the third side, and wherein the side reflector is configured to reflect light source light (back into the triangular light guide panel), wherein the angle α between the first side and the third side is 13 The angle is selected from a range of <90°, for example ≤60°, and the density of the optical outcoupling elements decreases with decreasing distance from the third side in a direction parallel to the first side.

[0068] In particular, the density variation of the optical outcoupling elements may advantageously (for illumination uniformity) be higher closer to the third side (or the second side). For example, in an embodiment, the triangular light guide panel may have an outcoupling element density pattern along a cross section of the triangular light guide panel, in particular wherein the density of the outcoupling elements along the cross section is consistent with the outcoupling element density pattern, and in particular wherein the cross section is parallel to the first side. The outcoupling element density pattern may have a length L parallel to the first side. d In particular, the length L d L may be equal to the length of the triangular light guide panel in the cross section (parallel to the first side). In addition, the outcoupling element density pattern may include a first pattern portion and a second pattern portion, in particular wherein the first pattern portion is (directly) arranged between the third side and the second pattern portion. In another embodiment, the first pattern portion may have a first pattern length L P1 , especially where 0.02≤L P1 / L d ≤0.3, for example 0.03≤L P1 / L d ≤0.2, especially 0.05≤L P1 / L d ≤0.1. In the first pattern portion, the density of the outcoupling elements may increase (relatively) rapidly in the direction away from the third side, for example, by at least 10%, in particular by at least 20%, for example, by at least 30%. Therefore, in an embodiment, the density of the outcoupling elements in the first pattern portion close to the second pattern portion may be at least 10% higher than the density in the first pattern portion close to the third side. In another embodiment, the second pattern portion may have a second pattern length L P2 , where 0.05≤L P2 / L d ≤0.8, for example 0.1≤L P2 / L d ≤0.5, especially 0.2≤L P2 / L d ≤0.4. In particular, in an embodiment, L P2 >L P1 , for example L P2 ≥1.5*L P1 , especially L P2 ≥2*L P1 Furthermore, in the second pattern portion, the density of the outcoupling elements can increase by 2-20%, for example, 5%-15%, and in particular 8%-12%, in a direction away from the third side surface. Thus, the first pattern portion can be shorter than the second pattern portion, but the increase in the density of the outcoupling elements (in a direction parallel to the first side surface and away from the third side surface) can be greater in the first pattern portion than in the second pattern portion.

[0069] In a further embodiment, the outcoupling element density pattern may further comprise a third pattern portion, in particular wherein the third pattern portion adjoins the second pattern portion, i.e. in particular wherein the second pattern portion is (directly) arranged between the first pattern portion and the third pattern portion. In such an embodiment, the third pattern portion may have a third pattern length L P3 , especially where 0.1≤L P3 / L d ≤0.9, for example 0.3≤L P3 / L d ≤0.8, especially 0.4≤L P3 / L d In particular, in the third pattern portion, the density of the outcoupling elements may vary by less than 15%, such as less than 10%, in particular less than 5%, such as less than 3%, compared to the average density of the outcoupling elements in the third pattern portion.

[0070] Therefore, along the cross section, the density of the optical outcoupling elements in the outcoupling element density pattern may initially increase (relatively) rapidly in a direction away from the third side surface along the first pattern portion, may then increase (relatively) slowly in a direction away from the third side surface in the second pattern portion, and may be (substantially) stable in the third pattern portion.

[0071] In an embodiment, the length L d In particular, it can be the length of the triangular light guide panel in the cross section (parallel to the first side). In another embodiment, the length L d It may be 30%-70%, for example 40%-60%, of the length of the triangular light guide panel in the cross section (parallel to the first side).

[0072] Since the triangular light guide panel has a triangular shape, the triangular light guide panel can have a varying width W perpendicular to the first side. In an embodiment, the lighting device can be divided into a plurality of segments along the first length L1. These segments can be defined between one or more cross sections perpendicular to the first side and perpendicular to the first triangular face.

[0073] In an embodiment, the plurality of segments comprises a first segment and a second segment, in particular wherein the triangular light guide panel has a first average width W1 in the first segment and a second average width W2 in the second segment, wherein W1>W2.

[0074] In another embodiment, in operation mode, the light source is configured to provide light source light having a first luminous flux F1 to the first segment and to provide light source light having a second luminous flux F2 to the second segment, wherein F1>F2. Therefore, in an embodiment, the wider portion can receive a higher luminous flux.

[0075] In another embodiment, along the first width range W', the triangular light guide panel has a first density D1 of light outcoupling components in the first section and a second density D2 of light outcoupling components in the second section, where D1>D2. Specifically, the first width range W' can be arranged adjacent to the third side surface in the second section. Therefore, within the first width range W', the density of light outcoupling components can be relatively low in the second section.

[0076] In the embodiment, the first width range is 0.03≤W' / W max ≤0.3, for example 0.05≤W' / W max ≤0.2, especially 0.08≤W' / W max ≤0.1.

[0077] In further embodiments, within each segment (of the plurality of segments), the density of the light outcoupling elements may increase with increasing normal distance to the light source arrangement, in particular along at least 80% of the width of the segment, such as along at least 90% of the width of the segment.

[0078] As described above, the triangular light guide panel of the present invention is particularly suitable for combination with a hinge device. In particular, in an embodiment, the lighting device may include a hinge device, wherein the hinge device is arranged at the first side, the second side or the third side, in particular at the first side, or in particular at the second side or the third side, for example at the second side, or for example at the third side. In practice, the hinge device and the array can be conveniently arranged at different sides. Therefore, in an embodiment, the hinge device can be particularly arranged at the second and / or third side. The hinge device can be particularly configured for functionally coupling to a second hinge device of a second lighting device. For example, the hinge device may include a female part and a male part configured for coupling to a male part and a female part of a second hinge device. Therefore, the two lighting devices can be arranged at a certain angle relative to each other via their hinge devices.

[0079] It may be desirable to connect more than two lighting devices via a hinge device. Therefore, in various embodiments, the lighting device may comprise two hinge devices, wherein the two hinge devices are arranged at two different sides (of the respective triangular light guide panel), in particular on the second side and the third side.

[0080] In a further embodiment, the lighting device may comprise three hinge devices, wherein each hinge device is arranged at a (respective) different side surface of the triangular light guide panel.

[0081] Thus, in an embodiment, the light generating system may comprise a plurality of lighting devices, in particular a first lighting device and a second lighting device. In an embodiment, the first hinge device may be arranged at a third side of the first lighting device and the second hinge device may be arranged at a third side of the second lighting device, in particular wherein the first hinge device is functionally coupled, in particular physically coupled to the second hinge device. In particular, in an embodiment, the first hinge device may be functionally coupled to the second hinge device, in particular physically coupled to the second hinge device, such that the first lighting device and the second lighting device are in a hinge configuration, in particular wherein the hinge configuration allows controlling the articulation angle between the first lighting device and the second lighting device. Furthermore, in an embodiment, the first hinge device may be functionally coupled to the second hinge device, in particular physically coupled to the second hinge device, such that the first lighting device and the second lighting device are hinged and can be folded relative to each other. In particular, in a further embodiment, the first lighting device and the second lighting device may each comprise a hinge having a right angle according to an isosceles right triangle (having a right angle second angle α 12 ). Thus, the first lighting device and the second lighting device together can be approximated to, in particular, define a square.

[0082] In further embodiments, the first hinge device may be arranged on the first side or the second side of the first lighting device, and the second hinge device may be arranged on the first side or the second side of the second lighting device.

[0083] In another embodiment, the first lighting device and the second lighting device may be arranged at an articulation angle α. h At, in particular, the articulation angle α h The articulation angle α is selected from the range of 0°-90°, for example, from the range of 5°-60°, and in particular from the range of 10°-40°. h In particular it may refer to the angle between the triangular light guide panels at the (respective) hinge means.In an embodiment, the hinge means may comprise a flexible portion, such as a polymer portion, to facilitate tilting of the hinge means.

[0084] In another embodiment, the plurality of lighting devices may include at least four lighting devices coupled via (corresponding) hinge devices, i.e., all four lighting devices are coupled together via the hinge devices. For example, if the four lighting devices are defined as A, B, C, and D, the couplings between the four lighting devices may include: AB, BC, and CD, where "AB" represents the physical coupling between lighting device A and lighting device B via the corresponding hinge devices. Alternatively, these couplings may include: AB, BC, CD, and AD. Alternatively, the couplings may include: AB, AC, and AD.

[0085] In a further embodiment, for at least two groups of two functionally coupled, in particular physically coupled, hinge devices, the hinge device is suitable for (a) one of the two functionally coupled hinge devices being arranged at the first side or the second side of one lighting device among a plurality of lighting devices, and (b) the other of the two functionally coupled hinge devices being arranged at the first side or the second side of another lighting device among a plurality of lighting devices.

[0086] The terms "upstream" and "downstream" relate to items or features relative to the propagation of light from a light-generating device (here, in particular, a light source), wherein, relative to a first position within a light beam from the light-generating device, a second position in the light beam that is closer to the light-generating device is "upstream," and a third position in the light beam that is further away from the light-generating device is "downstream." A person skilled in the art will appreciate that a reflector configured to reflect light from a space back into the space is therefore located both downstream and upstream in the space relative to the propagation of light.

[0087] The term "light source" can in principle relate to any light source known in the art. It can be a conventional (tungsten) bulb, a low-pressure mercury lamp, a high-pressure mercury lamp, a fluorescent lamp, an LED (light emitting diode). In a specific embodiment, the light source comprises a solid-state LED light source (e.g. an LED or a laser diode (or "diode laser")). The term "light source" can also relate to a plurality of light sources, such as a 2-2000 (solid-state) LED light source. Therefore, the term LED can also refer to a plurality of LEDs. Furthermore, the term "light source" can also refer to a so-called chip-on-board (COB) light source in an embodiment. The term "COB" refers in particular to an LED chip in the form of a semiconductor chip that is neither packaged nor connected but mounted directly to a substrate such as a PCB. Therefore, a plurality of light-emitting semiconductor light sources can be arranged on the same substrate. In an embodiment, a COB is a plurality of LED chips that are configured together as a single lighting module.

[0088] The term "light source" may also refer to a chip-scale package (CSP). A CSP may include a single solid-state die with a layer comprising a luminescent material disposed thereon. The term "light source" may also refer to a medium-power package. A medium-power package may include one or more solid-state dies. The die may be covered by a layer comprising a luminescent material. The die size may be equal to or less than 2 mm, for example, within a range of 0.2-2 mm. Thus, in embodiments, the light source comprises a solid-state light source. Furthermore, in certain embodiments, the light source comprises a chip-scale package LED. Herein, the term "light source" may also specifically refer to a small solid-state light source, such as one having a mini or micro-size. For example, the light source may include one or more mini-LEDs and micro-LEDs. In particular, in embodiments, the light source comprises a micro-LED, or "microLED," or "μLED." In this document, the terms mini-size or mini-LED particularly refer to solid-state light sources having dimensions (e.g., die size, particularly length and width) selected from the range of 100 μm-1 mm. Herein, the terms μ-size or micro-LED particularly refer to solid-state light sources having dimensions (e.g., die size, particularly length and width) selected from the range of 100 μm and smaller.

[0089] A light source may have a light exit surface. With reference to conventional light sources, such as light bulbs or fluorescent lamps, this may be the outer surface of a glass or quartz housing. For an LED, this may be, for example, the LED die, or, when a resin is applied to the LED die, the outer surface of the resin. In principle, it may also be the terminal end of an optical fiber. The term exit surface particularly relates to the part of the light source where light actually leaves the light source or escapes from the light source. The light source is configured to provide a light beam. This light beam (therefore) escapes from the light exit surface of the light source.

[0090] Likewise, the light generating device may comprise a light escape surface, such as an end window. Furthermore, likewise, the light generating system may comprise a light escape surface, such as an end window.

[0091] The term "light source" may refer to a semiconductor light emitting device, such as a light emitting diode (LED), a resonant cavity light emitting diode (RCLED), a vertical cavity laser diode (VCSEL), an edge emitting laser, etc. The term "light source" may also refer to an organic light emitting diode (OLED), such as a passive matrix (PMOLED) or an active matrix (AMOLED). In certain embodiments, the light source comprises a solid-state light source (e.g., an LED or a laser diode). In one embodiment, the light source comprises an LED (light emitting diode). The terms "light source" or "solid-state light source" may also refer to a superluminescent diode (SLED).

[0092] The term LED may also refer to a plurality of LEDs.

[0093] The term "light source" may also refer to a plurality of (substantially identical (or different)) light sources, such as 2-2000 solid-state light sources. In embodiments, the light source may comprise one or more micro-optical elements (micro-lens arrays) downstream of a single solid-state light source (e.g., an LED) or downstream of a plurality of solid-state light sources (i.e., shared by a plurality of LEDs, for example). In embodiments, the light source may comprise an LED with on-chip optics. In embodiments, the light source comprises a pixelated single LED (with or without optics) (in embodiments providing on-chip beam steering).

[0094] In an embodiment, the light source can be configured to provide a primary radiation that is used as is, for example, a blue light source like a blue LED, or a green light source such as a green LED, and a red light source such as a red LED. Such LEDs that may not include a luminescent material ("phosphor") may be denoted as direct color LEDs.

[0095] However, in other embodiments, the light source can be configured to provide primary radiation, and part of the primary radiation is converted into secondary radiation. The secondary radiation can be based on the conversion of the luminescent material. Therefore, the secondary radiation can also be expressed as luminescent material radiation. In an embodiment, the luminescent material can be included by the light source, such as an LED having a luminescent material layer or a dome comprising a luminescent material. Such an LED can be expressed as a phosphor-converted LED or a PC LED (phosphor-converted LED). In other embodiments, the luminescent material can be configured at a certain distance ("far") from the light source, such as an LED having a luminescent material layer that is not in physical contact with the die of the LED. Therefore, in a specific embodiment, the light source can be a light source that emits at least light of a wavelength selected from the range of 380-470 nm during operation. However, other wavelengths are also possible. The light can be partially converted by the luminescent material.

[0096] In embodiments, the light generating device may include a luminescent material. In embodiments, the light generating device may include a PCLED. In other embodiments, the light generating device may include a direct LED (i.e., without phosphor). In embodiments, the light generating device may include a laser device, such as a laser diode. In embodiments, the light generating device may include a superluminescent diode. Thus, in certain embodiments, the light source may be selected from the group consisting of a laser diode and a superluminescent diode. In other embodiments, the light source may include an LED.

[0097] The light source may in particular be configured to generate source light having an optical axis (O) (beam shape) and a spectral power distribution. In embodiments, the source light may comprise one or more frequency bands having a known bandwidth of the laser.

[0098] The term "light source" may (thus) refer to such a light generating element, such as a solid-state light source, or to a package of a light generating element, such as a solid-state light source, and one or more elements comprising luminescent material and (other) optical devices, such as lenses, collimators. A light converter element ("converter element" or "converter") may include an element comprising luminescent material. For example, a solid-state light source such as a blue LED is a light source. A combination of a solid-state light source (as a light generating element) and a light converter element (e.g. a blue LED and a light converter element) optically coupled to the solid-state light source may also be a light source (but may also be denoted as a light generating device). Thus, a white LED is a light source (but may also be denoted as a (white) light generating device, for example).

[0099] The term "light source" herein may also refer to light sources including solid state light sources, such as LEDs or laser diodes or superluminescent diodes.

[0100] Thus, in embodiments, the term "light source" may also refer to a light source that is (also) based on light conversion, such as a light source in combination with a luminescent converter material. Thus, the term "light source" may also refer to a combination of an LED and a luminescent material configured to convert at least part of the LED radiation, or a combination of a (diode) laser and a luminescent material configured to convert at least part of the (diode) laser radiation.

[0101] In embodiments, the term "light source" may also refer to a combination of a light source (e.g., an LED) and an optical filter that can modify the spectral power distribution of light generated by the light source. In particular, the term "light generating device" may be used to describe a light source and other (optical components), such as optical filters and / or beam shaping elements.

[0102] The phrases "different light sources" or "a plurality of different light sources" and similar phrases may refer, in embodiments, to a plurality of solid-state light sources selected from at least two different bins. Similarly, the phrases "the same light source" or "a plurality of the same light sources" and similar phrases may refer, in embodiments, to a plurality of solid-state light sources selected from the same bin.

[0103] The terms "solid-state light source" or "solid-state material light source" and similar terms may particularly refer to semiconductor light sources, such as light emitting diodes (LEDs), laser diodes or superluminescent diodes. Therefore, in an embodiment, the light generating system, in particular the light source device, comprises an array of light emitting diodes.

[0104] The light generating system may be part of or may be used in, for example, office lighting systems, home application systems, store lighting systems, household lighting systems, accent lighting systems, spotlighting systems, theater lighting systems, fiber optic application systems, projection systems, self-illuminating display systems, pixelated display systems, segmented display systems, warning sign systems, medical lighting application systems, indicator sign systems, decorative lighting systems, portable systems, automotive applications, (outdoor) road lighting systems, urban lighting systems, greenhouse lighting systems, horticultural lighting, digital projection, or LCD backlighting. The light generating system (or luminaire) may be part of or may be used in, for example, an optical communication system or a disinfection system.

[0105] In an embodiment, the light source may be configured to provide white light source light.

[0106] The term "white light" and similar terms herein are known to those skilled in the art. For general lighting, in particular, white light may refer to light having a correlated color temperature (CCT) between approximately 1800K and 20,000K, for example between 2000K and 20,000K, in particular between 2700K and 20,000K, in particular between 2700K and 20,000K, in particular for general lighting. In embodiments, for example, for backlighting purposes or for other purposes, the correlated color temperature (CCT) may in particular be in the range of approximately 7000K and 20,000K. Furthermore, in embodiments, the correlated color temperature (CCT) is in particular within approximately 15 SDCM (standard deviation of color matching) from the BBL (blackbody locus), in particular within approximately 10 SDCM from the BBL, and even more in particular within approximately 5 SDCM from the BBL.

[0107] In certain embodiments, the correlated color temperature (CCT) may be selected from the range of 6000-12000 K, such as from the range of 7000-12000 K, such as at least 8000 K. Furthermore, in embodiments, the correlated color temperature (CCT) may be selected from the range of 6000-12000 K, such as from the range of 7000-12000 K, in combination with a CRI of at least 70.

[0108] In one embodiment, the light source may also provide light source light having a correlated color temperature (CCT) between approximately 5000 K and 20000 K, such as a direct phosphor-converted LED (a blue light-emitting diode with a thin phosphor layer for obtaining, for example, 10000 K). Thus, in a particular embodiment, the light source is configured to provide light source light having a correlated color temperature in the range of 5000-20000 K, even more particularly in the range of 6000-20000 K, such as 8000-20000 K. An advantage of a relatively high color temperature may be that a relatively high blue component may be present in the light source light.

[0109] In an embodiment, the light source may be configured to provide visible source light, ie source light comprising visible light.

[0110] The terms "visible", "visible light" or "visible emission" and similar terms refer to light having one or more wavelengths in the range of about 380-780 nm. In this context, UV especially refers to wavelengths selected from the range of 190-380 nm, such as 200-380 nm.

[0111] The terms "light" and "radiation" are used interchangeably herein, unless it is clear from the context that the term "light" refers only to visible light. Thus, the terms "light" and "radiation" may refer to UV radiation, visible light, and IR radiation. In certain embodiments, particularly for lighting applications, the terms "light" and "radiation" refer (at least) to visible light.

[0112] As mentioned above, in an embodiment, the light generating system may include a control system. The control system may be configured to control the light source.

[0113] The control system can also be configured to receive and execute commands from a remote control. In an embodiment, the control system can be controlled via an app on a device, such as a portable device such as a smartphone or iPhone, a tablet, etc. Therefore, the device does not have to be coupled to the lighting system, but can be (temporarily) functionally coupled to the lighting system.

[0114] Therefore, in an embodiment, the control system can (also) be configured to be controlled by an app on a remote device. In such an embodiment, the control system of the lighting system can be a slave control system or controlled in slave mode. For example, the lighting system can be identified by a code, in particular a unique code for the respective lighting system. The control system of the lighting system can be configured to be controlled by an external control system, which accesses the lighting system based on knowledge of the (unique) code (entered by a user interface of an optical sensor with a (unique) code (e.g., a QR code reader)). The lighting system may also include means for communicating with other systems or devices, for example based on Bluetooth, Thread, WIFI, LiFi, ZigBee, BLE or WiMAX or other wireless technologies.

[0115] In an embodiment, the control system may be controlled according to one or more of an input signal of a user interface, a sensor signal (of a sensor), and a timer. The term "timer" may refer to a clock and / or a predetermined time scheme.

[0116] In another aspect, the present invention may provide such a triangular light guide panel. In another aspect, the present invention may provide such a lighting device.

[0117] In yet another aspect, the present invention also provides a lamp or a luminaire comprising a light generating system as defined herein. The luminaire may further comprise a housing, optical elements, a shading grid, etc. The lamp or luminaire may further comprise a housing surrounding the light generating system. The lamp or luminaire may comprise a light window or housing opening in the housing, through which the system light may escape from the housing. In yet another aspect, the present invention also provides a projection device comprising a light generating system as defined herein. In particular, a projection device or "projector" or "image projector" may be an optical device that projects an image (or moving image) onto a surface such as a projection screen. A projection device may comprise one or more light generating systems as described herein.

[0118] Thus, in one aspect, the present invention further provides a lighting device selected from the group consisting of a lamp, a luminaire, a projector device, a disinfection device, a photochemical reactor, and an optical wireless communication device, comprising a light generating system as defined herein. The lighting device may include a housing or carrier configured to house or support one or more elements of the light generating system. For example, in an embodiment, the lighting device may include a housing or carrier configured to house or support one or more triangular light guide panels.

[0119] In another aspect, the present invention may provide an indoor space that houses a light generating system according to the present invention, particularly a light generating system comprising a plurality of lighting devices coupled via (corresponding) hinge devices. Specifically, in an embodiment, the plurality of lighting devices may be (configured to) form a structure comprising a curve defined by four or more lighting devices.

[0120] Instead of the term "lighting device" or "lighting system" and similar terms, the term "light generating device" or "light generating system" (and similar terms) may also be used. A lighting device or lighting system may be configured to generate device light (or "lighting device light") or system light (or "lighting system light"). As described above, the terms light and radiation may be used interchangeably. A lighting device may include a light source. In embodiments, the device light may include one or more of light source light and converted light source light (e.g., luminescent material light). BRIEF DESCRIPTION OF THE DRAWINGS

[0121] Embodiments of the invention will now be described, by way of example only, with reference to the accompanying schematic drawings, in which corresponding reference characters indicate corresponding parts, and in which:

[0122] Figure 1A-Figure 1C One embodiment of a light generating system is schematically depicted.

[0123] Figure 2A-2B Aspects of one embodiment of a light generating system are schematically depicted.

[0124] Figure 3A-3B An embodiment of a light generating system is schematically depicted, the light generating system comprising a plurality of lighting devices functionally coupled via a hinge device.

[0125] Figure 4 Embodiments of lighting devices and interior spaces are schematically depicted. The schematic diagrams are not necessarily drawn to scale. DETAILED DESCRIPTION

[0126] Figure 1A-Figure 1C An embodiment of a light generating system 1000 is schematically depicted, comprising an illumination device 100 having a triangular light guide panel 130 and a light source device 110. In the depicted embodiment, the triangular light guide panel 130 includes a first triangular face 136 and a second triangular face 139, wherein the first triangular face 136 and the second triangular face are arranged opposite each other. Furthermore, in the depicted embodiment, the triangular light guide panel 130 also includes a first side face 131, a second side face 132, and a third side face 133, wherein all of the side faces 131, 132, and 133 bridge the distance d1 between the first triangular face 136 and the second triangular face 139. The first side face may, in particular, have a first length L1. Specifically, the first side face may have a first length L1 along an elongation axis (of the first side face 131). Furthermore, in the depicted embodiment, the light source device 110 includes a plurality of light sources 10 arranged in an array 115 aligned with the first side face 131, wherein the plurality of light sources 10 are configured to provide light source light 11 having a luminous flux. Specifically, the light source 10 can be configured to provide light source light 11 to the first side 131, that is, the first side 131 can be arranged to be in a light receiving relationship with (multiple) light sources. The triangular light guide panel 130 can also include a light outcoupling element 120, wherein the light outcoupling element is arranged in the triangular light guide panel 130, on the first triangular face and / or on the second triangular face. The light outcoupling element can be configured to facilitate the outcoupling of light from the triangular light guide panel 130, in particular to facilitate the outcoupling of light via the first triangular face. The lighting device 100, in particular the light source device 110 and the triangular light guide panel 130 can be configured so that in the first operating mode of the light generating system 1000, at least a portion of the light source light 11 enters the triangular light guide panel 130 via the first side 131 to provide coupled-in light source light, in particular wherein the triangular light guide panel 130 is configured to guide the coupled-in light source light via total internal reflection. In addition, the lighting device 100, in particular the light source device 110 and the triangular light guide panel 130 can be configured so that in the first operating mode of the light generating system 1000, at least a portion of the coupled-in light source light is coupled out from the triangular light guide panel 130 via (the light coupling-out element and) the first triangular face 136.

[0127] In an embodiment, the density of the light outcoupling elements 120 may increase with an increase in the normal distance ND from the first side surface 131 , that is, the density of the light outcoupling elements may increase with an increase in the distance perpendicular to the first side surface.

[0128] In further embodiments, in the first operating mode, the light source light 11 incident on the first side 131 may have a luminous flux gradient of at least 20% along the first length L1.

[0129] Figure 1A In the depicted embodiment, the light generating device comprises a back plate 171 , a compressed back foam 172 , a triangular reflector 159 , a triangular light guide panel 130 , a (third) side reflector 153 , a hinge device 160 and a side profile 178 .

[0130] Specifically, in the depicted embodiment, the triangular reflector 159 is arranged downstream of the second triangular facet 139 and is configured to reflect the light source light 11 (backwards) into the triangular light guide panel 130 via the second triangular facet 139 .

[0131] Furthermore, in the depicted embodiment, the hinge device 160 is arranged at the third side 133. In further embodiments, the hinge device 160 may (also) be arranged at the first side 131 or the second side 132, in particular at the second side 132.

[0132] Figure 1B An embodiment of a light generating system 1000 comprising a (third) side reflector 153 is schematically depicted. In the depicted embodiment, the (third) side reflector 153 is arranged downstream of the third side 133 and is configured to reflect the light source light 11 (back into the triangular light guide panel 130), in particular at the third side 133. Furthermore, the (first) angle α between the first side 131 and the third side 133 is 13 It may be <90°, for example ≤60°. In particular, in the depicted embodiment, the (first) angle α 13 Furthermore, in the depicted embodiment, the density of the light outcoupling elements 120 may decrease with decreasing distance from the third side 133 in a direction parallel to the first side 131 (see also FIG. 2 ).

[0133] Similarly, in the depicted embodiment, the light generating system 1000 includes a (second) side reflector 152, wherein the (second) side reflector 152 is arranged downstream of the second side 132, and wherein the (second) side reflector 152 is configured to reflect the light source light 11 (back into the triangular light guide panel 130) at the second side 132.

[0134] Figure 1B An embodiment is further schematically depicted in which the triangular light guide panel 130 has a right angle between the first side 131 and the second side 132. Specifically, in the depicted embodiment, the (second) angle α between the first side 131 and the second side 132 is 12 is 90°. In another embodiment, the (second) angle α 12 It can be <90° or >90°, such as selected from the range of 30°-130°, such as the range of 50°-120°, especially the range of 70°-110°, such as the range of 80°-100°. Generally, in the embodiment, α 12 >α 13 .

[0135] In the depicted embodiment, the (third) angle α between the second side 132 and the third side 133 is 23 is 45°. Thus, in the depicted embodiment, the triangular light guide panel 130 has a (first angle) α at the first corner 213. 13 , having a second angle α at the second corner 212 12 , and has a third angle α at the third corner 223 13 , where α 13 and α 23 is 45° and α 12 is 90°. Thus, in the depicted embodiment, the triangular light guide panel has a shape according to an isosceles right triangle.

[0136] Therefore, in Figure 1B , the first length L1 of the first side 131 is equal to the second length L2 of the second side 132. Furthermore, in the depicted embodiment, the third length L3 of the third side 133 has Length, i.e., approximately 1.41*L1.

[0137] In other embodiments, 0.5≤L1 / L2≤2, for example, 0.7≤L1 / L2≤1.5, and particularly 0.8≤L1 / L2≤1.3, for example, 0.98≤L1 / L2≤1.02.

[0138] In other embodiments, 1.1≤L1 / L3≤3, for example, 1.2≤L1 / L3≤2, and particularly 1.3≤L1 / L3≤1.6, for example, 1.4≤L1 / L3≤1.45.

[0139] like Figure 1B As shown, the triangular light guide panel can have a varying width W perpendicular to the first side 131. In the illustrated embodiment, the lighting device 100 is divided into a plurality of segments 140 along a first length L1, including a first segment 141 and a second segment 142. Specifically, the triangular light guide panel 130 has a first average width W1 in the first segment 141 and a second average width W2 in the second segment 142, where W1>W2.

[0140] In another embodiment, particularly in the operating mode, the light source 10 can be configured to provide light source light 11 having a first luminous flux F1 to the first segment 141, and to provide light source light having a second luminous flux F2 to the second segment 142, where F1>F2. Thus, the light source 10 can be configured to provide a higher luminous flux F2 to a wider segment.

[0141] Refer to the right Figure 1B , the luminous flux thus comprises two gradients, having a mutual maximum (here approximately F1), somewhere between greater than 0> L1 and less than L1. In one direction, the first gradient increases while the second gradient decreases. Both gradients may be substantially over the entire length L1.

[0142] In another embodiment, along the first width range W', the triangular light guide panel 130 may have a first (average) density D1 of light outcoupling elements 120 in the first section 141 and a second (average) density D2 of light outcoupling elements 120 in the second section 142, where D1 > D2. In particular, for the second section 142, the first width range W' may be close to the third side 133, while for the wider first section 141, the first width range W' is away from the third side.

[0143] As described above, the density of the light outcoupling elements 120 may increase with increasing normal distance ND from the first side 131. Therefore, in an embodiment, within each segment 140 (of the plurality of segments 140), the density D of the light outcoupling elements 120 may increase with increasing normal distance ND from the first side 131.

[0144] Figure 1B An embodiment is further schematically depicted, wherein in the first operating mode, the light source light 11 incident on the first side 131 has a luminous flux gradient of at least 20% along the first length L1. In particular, Figure 1BA graph of luminous flux F versus position l along first length L1 is schematically depicted (on the right). For visualization purposes, the graph is depicted aligned with first side 131. In FIG1 , this extends from first corner 213 to second corner 212. Specifically, in the depicted embodiment, along first length L1, luminous flux varies according to a unimodal distribution 30, wherein the unimodal distribution 30 is skewed, particularly toward first corner 213, i.e., a peak 35 of the luminous flux (or "unimodal distribution") is closer to second corner 212 than to first corner 213.

[0145] In other embodiments, the peak 35 of the unimodal distribution is disposed at a distance d2 from the second side 132 , wherein d2 is selected from the range of 0.1*L1-0.45*L1, such as the range of 0.2*L1-0.4*L1.

[0146] In the depicted embodiment, the light source pitch p (particularly the LED pitch) in the array 115 varies along the first length L1 to provide a luminous flux that varies over at least a portion of the first length L1, and in particular, to provide a luminous flux gradient. Specifically, in the depicted embodiment, along the first length L1, the light source density may vary according to a unimodal distribution 30, wherein the unimodal distribution is skewed toward the first corner 213.

[0147] Additionally or alternatively, and in particular in the first operating mode, the light generating system 1000 may be configured to vary the current provided to the light source 10 along the first length L1 to provide a luminous flux variation, in particular a luminous flux gradient.

[0148] Furthermore, in embodiments where the amount of luminous flux incident on the first side 131 approximates (or follows) a unimodal distribution 30, the light source light 11 incident on the first side 131 may have two luminous flux gradients extending from the peak 35 of the unimodal distribution 30, one of which extends toward the first corner 213 and one of which extends toward the second corner 212. Thus, in embodiments, the light source light 11 incident on the first side 131 may have a first luminous flux gradient along at least 20% of the first length L1 and a second luminous flux gradient along at least 20% of the first length L1. In further embodiments, the first luminous flux gradient and the second luminous flux gradient may together cover at least 90%, for example, at least 95%, of the first length L1.

[0149] Figure 1C One embodiment of a light generating system 1000 having a triangular light guide panel without right angles is schematically depicted. In the depicted embodiment, the triangular light guide panel has a maximum width W perpendicular to the first side (ie perpendicular to the first length L1). Max , where the maximum width W MaxDifferent from the second length L2. In the embodiment, W Max It can be selected from the range of 0.1*L1-10*L1, such as the range of 0.2*L1-5*L1, especially the range of 0.5*L1-2*L1. In another embodiment, W Max It can be selected from the range of 0.8*L1-1.2*L1, for example, from the range of 0.9*L1-1.1*L1.

[0150] In another embodiment, for example, Figure 1B In, L1 and W Max can be (essentially) equal. In particular, Figure 1B In, W Max Can be equal to L2.

[0151] Figure 2A Schematically depicts the Figure 1B The outcoupling element density pattern 20 of the three cross sections 31, 31a, 31b, 31c of the triangular light guide panel 130 is parallel to the first side surface 131. In particular, Figure 1B In the embodiment shown, the density of the outcoupling elements along the cross sections 31, 31a, 31b, 31c is Figure 2A The density pattern of the outcoupling components shown is consistent. Specifically, Figure 2A The density D (in au) versus the position l (in au) along the first length L1 relative to the second corner 212 is shown, where ( Figure 2A The line Da corresponds to ( Figure 1B ) cross section 31a, line Db corresponds to cross section 31b, and line Dc corresponds to cross section 31c. Therefore, as Figure 2A As shown, the density of the optical outcoupling elements 120 may increase overall from the cross section 31a to 31b to 31c, that is, as the normal distance ND to the first side surface 131 increases. Figure 2A As shown, the density of the optical outcoupling elements 120 may decrease as the distance from the direction parallel to the first side 131 to the third side 133 decreases.

[0152] also, Figure 2A It is schematically depicted that the rate of change of the density of the optical coupling elements may be relatively high near the third side 133, the rate of change may be significantly lower at a point removed from the third side, and the density may (substantially) fluctuate around a constant value away from the third side 133. In particular, in an embodiment, the outcoupling element density pattern 20 for the cross section may have a length L parallel to the first side 131. d In order to Figure 2A For visualization purposes, the length L dOnly the cross section 31a is drawn. In the embodiment shown, the outcoupling element density pattern 20 further includes a first pattern portion 21 and a second pattern portion 22, wherein the first pattern portion 21 is (directly) arranged between the third side 133 and the second pattern portion 22. In particular, the first pattern portion 21 has a first pattern length L P1 , where 0.03≤L P1 / L d ≤0.2, wherein in the first pattern portion 21, the density of the outcoupling elements 120 increases by at least 20% in a direction away from the third side 133. In addition, the second pattern portion 22 may have a second pattern length L P2 , where 0.1≤L P2 / L d ≤0.5, and wherein in the second pattern portion 22 , the density of the outcoupling elements 120 increases by 5%-15% in a direction away from the third side surface 133 .

[0153] In another embodiment, the outcoupling element density pattern 20 further includes a third pattern portion 23, wherein the third pattern portion 23 is adjacent to the second pattern portion 22, and wherein the third pattern portion 23 has a third pattern length L P3 , where 0.3≤L P3 / L d ≤0.8, and wherein in the third pattern portion 23 , the density of the outcoupling elements 120 varies by less than 10% relative to the average density of the outcoupling elements 120 in the third pattern portion 23 .

[0154] Figure 2B The density of the light outcoupling elements 120 arranged on or in an embodiment of a triangular light guide panel 130 is schematically depicted. In particular, the shading pattern that changes from left to right and from top to bottom corresponds to an increasing density of the light outcoupling elements 120. For visualization purposes, a higher density of light outcoupling elements 120 is represented by a higher density of shading. Thus, as Figure 2B As shown, in embodiment (a), the density of the light outcoupling elements 120 may increase with increasing normal distance ND from the first side surface 131, and may decrease with decreasing distance from the third side surface 133 in a direction parallel to the first side surface 131. Such a distribution of the light outcoupling elements 120 may help provide particularly uniform system light 1001 from the first triangular face 136.

[0155] For visualization purposes, in the depicted embodiment, the density of the light outcoupling elements 120 decreases significantly at a certain distance from the third side 133 (parallel to the first side 131). In other embodiments, the decrease may be more gradual (see also FIG. Figure 2A ).

[0156] Furthermore, in embodiments, the density of the optical outcoupling elements 120 may be varied via one or more of the size of the optical outcoupling elements 120 or the number of the optical outcoupling elements 120 .

[0157] In another embodiment, the light outcoupling element 120 may be arranged on the second triangular face 139 , in particular wherein at least part of the incoupled light source light is coupled out from the triangular light guide panel 130 via the light outcoupling element and the first triangular face 136 .

[0158] Figure 3A An embodiment of a light generating system 1000 comprising a plurality of lighting devices 100 is schematically depicted. Specifically, in the depicted embodiment, the light generating system 1000 comprises four lighting devices 100, wherein the lighting devices 100 are functionally coupled via hinge devices 160. In particular, (at least) two lighting devices 100 comprise hinge devices 160 on two side surfaces, i.e., on their second and third sides in the depicted embodiment. In further embodiments, the lighting device may comprise three hinge devices 160, in particular wherein a hinge device 160 is arranged on each side surface.

[0159] In another embodiment, the plurality of lighting devices 100 includes at least four lighting devices 100 coupled via (corresponding) hinge devices 160. In particular, for at least two groups of two functionally coupled hinge devices 160, in particular physically coupled hinge devices, it is applicable that (a) one of the two functionally coupled hinge devices 160 is arranged at the first side surface 131 or the second side surface 132 of one lighting device in the plurality of lighting devices 100; and the other of the two functionally coupled hinge devices 160 is arranged at the first side surface 131 or the second side surface 132 of another lighting device in the plurality of lighting devices 100.

[0160] In addition, Figure 3A In the depicted embodiment, the light generating system 1000 includes a plurality of lighting devices 100, including a first lighting device 101 and a second lighting device 102. Specifically, in the depicted embodiment, a first hinge device 161 is disposed at the third side 133 of the first lighting device 101, and a second hinge device 162 is disposed at the third side 133 of the second lighting device 162, and the first hinge device 161 is functionally coupled, in particular, physically coupled, to the second hinge device 162.

[0161] In another embodiment, the first hinge device 161 can be arranged on the first side 131 or the second side 132 of the first lighting device 101, in particular, on the first side 131, or in particular, on the second side 132. Similarly, in an embodiment, the second hinge device 162 can be arranged on the first side 131 or the second side 132 of the second lighting device 102, in particular, on the first side 131, or in particular, on the second side 132.

[0162] For example, Figure 3B Schematically depicts a close-up view of the lighting devices 100 functionally, in particular physically, coupled via (respective) hinge devices 160, wherein the hinge device 160 is arranged on the second side 132 of the first lighting device 101 and the second lighting device 102. In particular, in the depicted embodiment, the first lighting device 101 and the second lighting device 102 are arranged at a hinge angle α. h Where the hinge angle α h It is selected from the range of 5°-60°.

[0163] Figure 4 An embodiment of a luminaire 2 including a light generating system 1000 as described above is schematically depicted. Reference numeral 301 denotes a user interface, which may be functionally coupled to a control system 300 included in or functionally coupled to the light generating system 1000. FIG3 also schematically depicts an embodiment of a lamp 1 including the light generating system 1000. Reference numeral 3 denotes a projector device or projector system, which may be used, for example, to project an image onto a wall and may also include the light generating system 1000. Thus, FIG3 schematically depicts an embodiment of a lighting device 1200 selected from the group consisting of a lamp 1, a luminaire 2, a projector device 3, a disinfection device, a photochemical reactor, and an optical wireless communication device, the lighting device 1200 including the light generating system 1000 as described herein. In embodiments, such a lighting device may be the lamp 1, the luminaire 2, the projector device 3, the disinfection device, or the optical wireless communication device. Light emitting from the lighting device 1200 is denoted by reference numeral 1201. The lighting device light 1201 may essentially consist of the system light 1001 and may therefore in certain embodiments be the system light 1001. Reference numeral 1300 denotes a space, in particular an indoor space, such as a room.

[0164] Specifically, Figure 4 An embodiment of a light generating system 1000 is schematically depicted, wherein the light generating system comprises a plurality of lighting devices 100 .

[0165] Figure 4One embodiment of an indoor space housing a light generating system is further schematically depicted. In the depicted embodiment, a plurality of lighting devices 100 form a structure including a curve defined by four or more lighting devices 100.

[0166] The term "plurality" means two or more.

[0167] The terms "substantially" or "essentially" and similar terms herein will be understood by those skilled in the art. The terms "substantially" or "essentially" may also include embodiments with "completely," "entirely," "entirely," etc. Therefore, in embodiments, the adjectives "substantially" or "essentially" may also be removed. Where applicable, the terms "substantially" or "essentially" may also relate to 90% or higher, such as 95% or higher, in particular 99% or higher, even more in particular 99.5% or higher, including 100%.

[0168] The term "comprising" also includes embodiments wherein the term "comprising" means "consisting of.

[0169] The term "and / or" specifically refers to one or more of the items mentioned before and after "and / or". For example, the phrase "item 1 and / or item 2" and similar phrases can refer to one or more of item 1 and item 2. The term "comprising" can mean "consisting of" in one embodiment, but can also mean "containing at least the defined substances and optionally one or more additional substances" in another embodiment.

[0170] Furthermore, the terms first, second, third, etc. in the description and claims are used to distinguish similar elements and not necessarily to describe a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances, and that the embodiments of the invention described herein are capable of operation in other sequences than those described or illustrated herein.

[0171] These devices, apparatuses or systems may be described herein during operation. It will be clear to those skilled in the art that the present invention is not limited to methods of operation, or devices, apparatuses or systems in operation.

[0172] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims.

[0173] In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

[0174] The use of the verb "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. Unless the context clearly requires otherwise, throughout the specification and claims, the words "comprise," "comprising," etc. are to be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to."

[0175] The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0176] The present invention can be implemented by means of hardware comprising several distinct elements and by means of a suitably programmed computer. In a device claim, apparatus claim, or system claim enumerating several means, several of these means may be implemented by the same item of hardware. The fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. In a further aspect, the present invention (therefore) provides a software product which, when run on a computer, is capable of implementing (one or more embodiments of) the method as described herein.

[0177] The present invention also provides a control system that can control an apparatus, device, or system, or can perform the methods or processes described herein. Furthermore, the present invention provides a computer program product that, when executed on a computer functionally coupled to or included in an apparatus, device, or system, controls one or more controllable elements of such an apparatus, device, or system.

[0178] The present invention also applies to an apparatus, device or system comprising one or more of the features described in the specification and / or shown in the accompanying drawings. The present invention also relates to a method or process comprising one or more of the features described in the specification and / or shown in the accompanying drawings.

[0179] The various aspects discussed in this patent can be combined to provide additional advantages. In addition, those skilled in the art will understand that the embodiments can be combined, and more than two embodiments can also be combined. In addition, some features can form the basis of one or more divisional applications.

Claims

1. A light generating system (1000), comprising an illumination device (100) having a triangular light guide panel (130) and a light source device (110), wherein: The triangular light guide panel (130) comprises a first triangular face (136) and a second triangular face (139), wherein the triangular light guide panel (130) further comprises a first side face (131), a second side face (132) and a third side face (133), wherein the first side face (131), the second side face (132) and the third side face (133) bridge a distance (d1) between the first triangular face (136) and the second triangular face (139), wherein the first side face has a first length (L1); The light source device (110) includes a plurality of light sources (10), the plurality of light sources (10) being configured as an array (115) aligned with the first side (131), wherein the light sources (10) are configured to provide light source light (11) having a luminous flux, wherein the light sources (10) include solid-state light sources; The triangular light guide panel (130) comprises a plurality of light outcoupling elements (120), wherein the light outcoupling elements (120) are arranged in the triangular light guide panel (130), and / or are arranged on the first triangular face (136), and / or are arranged on the second triangular face (139); and wherein the light outcoupling elements (120) are configured to facilitate light outcoupling from the triangular light guide panel (130); The light source device (110) and the triangular light guide panel (130) are configured such that, in a first operating mode of the light generating system (1000), (a) at least a portion of the light source light (11) enters the triangular light guide panel (130) via the first side surface (131) to provide in-coupled light source light (12), wherein the triangular light guide panel (130) is configured to guide the in-coupled light source light via total internal reflection, and (b) at least a portion of the in-coupled light source light (12) is coupled out of the triangular light guide panel (130) via the first triangular face (136); The density of the optical outcoupling elements (120) increases with the increase of the normal distance (ND) from the first side surface (131); and In the first operating mode, the light source light (11) incident on the first side (131) has a luminous flux gradient along at least 20% of the first length (L1).

2. The light generating system (1000) according to claim 1, wherein the density of the light outcoupling elements (120) varies in a cross section parallel to the first side (131).

3. The light generating system (1000) according to claim 2, wherein the light generating system (1000) comprises a side reflector (153), wherein the side reflector (153) is arranged downstream of the third side (133), and wherein the side reflector (153) is configured to reflect the light source light (11), wherein the angle (α) between the first side (131) and the third side (133) is 13 ) is selected from a range of <90°, and wherein the density of the optical coupling-out elements (120) decreases with decreasing distance from the third side (133) in a direction parallel to the first side (131).

4. The light generating system (1000) according to claim 3, wherein the triangular light guide panel (130) has an outcoupling element density pattern (20) along a cross section (31) of the triangular light guide panel (130), wherein the cross section (31) is parallel to the first side (131), wherein the outcoupling element density pattern (20) has a length (Ld) parallel to the first side (131), and wherein the outcoupling element density pattern (20) includes a first pattern portion (21) and a second pattern portion (22), wherein the first pattern portion (21) is arranged between the third side (133) and the second pattern portion (22), wherein: The first pattern portion (21) has a first pattern length (L P1 ), where 0.03≤L P1 / L d ≤0.2, wherein in the first pattern portion (21), the density of the outcoupling elements (120) increases by at least 20% in a direction away from the third side (133); and The second pattern portion (22) has a second pattern length (L P2 ), where 0.1≤L P2 / L d ≤0.5, and wherein in the second pattern portion (22), the density of the outcoupling elements (120) increases by 5% to 15% in a direction away from the third side (133).

5. The light generating system (1000) according to claim 4, wherein the outcoupling element density pattern (20) further comprises a third pattern portion (23), wherein the third pattern portion (23) is adjacent to the second pattern portion (22), and wherein: The third pattern portion (23) has a third pattern length (L P3 ), where 0.3≤L P3 / L d ≤0.8, wherein in the third pattern portion (23), the density of the outcoupling elements (120) varies by less than 10% relative to the average density of the outcoupling elements (120) in the third pattern portion (23).

6. The light generating system (1000) according to any one of the preceding claims, wherein the triangular light guide panel (130) has a varying width (W) perpendicular to the first side (131), wherein the lighting device (100) is divided into a plurality of segments (140) along the first length (L1), wherein: The plurality of segments (140) include a first segment (141) and a second segment (142); The triangular light guide panel (130) has a first average width (W1) in the first section (141) and a second average width (W2) in the second section (142), wherein W1>W2; and In the operating mode, the light source (10) is configured to provide light source light (11) having a first luminous flux (F1) to the first segment (141), and to provide light source light (11) having a second luminous flux (F2) to the second segment (142), wherein F1>F2.

7. The light generating system (1000) according to claim 6, wherein: Along a first width range (W'), the triangular light guide panel (130) has a first density D1 of light outcoupling elements (120) in the first section (141) and a second density D2 of light outcoupling elements (120) in the second section (142), wherein D1>D2.

8. The light generating system (1000) of any one of the preceding claims, wherein the density of the light outcoupling elements (120) is varied via one or more of: (i) the size of the light outcoupling elements (120) and (ii) the number of the light outcoupling elements (120); and wherein the light outcoupling elements (120) are arranged on the second triangular face (139), wherein at least a portion of the coupled-in light source light (12) is coupled out from the triangular light guide panel (130) via the light outcoupling elements and the first triangular face (136).

9. The light generating system (1000) of any one of the preceding claims, wherein along the first length (L1), the light flux varies according to a unimodal distribution (30), wherein the first side (131) shares a corner (213) with the third side (133), and wherein the unimodal distribution (30) is skewed towards the corner (213).

10. A light generating system (1000) according to any one of the preceding claims, wherein the triangular light guide panel (130) has a right angle between the first side (131) and the second side (132), and wherein the second side (132) has a second length (L2), wherein 0.98≤L1 / L2≤1.

02.

11. The light generating system (1000) according to any one of the preceding claims, wherein a pitch (p) of light sources in the array (115) varies along the first length (L1) to provide the light flux gradient.

12. A light generating system (1000) according to any one of the preceding claims, wherein the light generating system (1000) comprises a plurality of lighting devices (100), the plurality of lighting devices (100) comprising a first lighting device (101) and a second lighting device (102), wherein a first hinge device (161) is arranged at the third side (133) of the first lighting device (101), and wherein a second hinge device (162) is arranged at the third side (133) of the second lighting device (162), wherein the first hinge device (161) is functionally coupled to the second hinge device (162).

13. The light generating system (1000) according to claim 12, wherein the first lighting device (101) and the second lighting device (102) are arranged at a hinge angle (α h ) where the hinge angle (α h ) is selected from the range of 5° to 60°.

14. The light generating system (1000) according to any one of the preceding claims 12 to 13, wherein the plurality of lighting devices (100) comprises at least four lighting devices (100) coupled via a hinge device (160), wherein for at least two groups of two functionally coupled hinge devices (160), it is suitable to: One of the two functionally coupled hinge devices (160) is arranged at the first side surface (131) or the second side surface (132) of one of the plurality of lighting devices (100); Another hinge device of the two functionally coupled hinge devices (160) is arranged at the first side surface (131) or the second side surface (132) of another lighting device among the plurality of lighting devices (100).

15. An indoor space (1300) housing a light generating system (1000) according to any one of the preceding claims 12 to 14, wherein the plurality of lighting devices (100) form a structure comprising a curve defined by four or more lighting devices (100).

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