Lighting systems and artificial windows

Abstract

To counteract a disadvantage of a known artificial skylight device.SOLUTION: The invention relates to a lighting system, which comprises a light area and a side wall around the light area defining a recess. The light area is located at a base of the recess, and a light exit window is located downstream at a top of the recess opposite the light area. The side wall comprises a first wall portion, and a second wall portion located upstream of the first wall portion. A clear transparent pane is provided between the first and second wall portions, where (essentially the whole of) the second wall portion is screened by the first wall portion from a direct line of view through the light exit window.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lighting system and an artificial window.

Background Art

[0002] Artificial skylight devices are a relatively new type of device that has recently received significant attention. These aim to provide humans with a sense of connection to nature while indoors, where access to natural light may be completely or partially unavailable. Examples of such indoor spaces are offices, corridors, subways, underground malls, stations, tunnels, hospitality areas, hospitals, airplanes, submarines, etc. Currently, there are many different artificial skylights, ranging from (very) low-end, low-cost, static (backlit) posters to (almost) non-practical, unaffordable, large-sized and heavy, high-volume, high-tech devices that employ wavelength-dependent nanoparticle scattering, known as Rayleigh scattering (the reason the sky is blue), and more expensive, high-resolution dynamic TV and / or projector-based devices. A relatively simple and low-cost artificial skylight device is known from US 9,488,327 B2. This device consists of an embedded panel that functions as a diffused light source representing a blue sky and a set of one or more sidewalls with triangular portions that can be backlit, thereby mimicking the sunlit portion while providing a visual cue towards the position of the distant sun in the sky. However, this known artificial skylight device has the disadvantage of providing only a moderate realistic sensation of an actual window or skylight.

Summary of the Invention

Problems to be Solved by the Invention

[0003] An object of the present invention is to address the disadvantages of known artificial skylight devices.

Means for Solving the Problems

[0004] For this purpose, the present invention provides a light area extending across the main axis direction, A recess having a cross-section is defined by a side wall extending downstream from the light region, A lighting system including, The light area is located at the bottom of the recess, and the light exit window is located downstream at the top of the recess opposite the light area. The side wall includes a first wall section and a second wall section located upstream of the first wall section. A transparent pane is provided between the first wall and the second wall. This proposal proposes a lighting system in which the entire second wall is essentially screened by the first wall, preventing direct line of view through the light-exit window.

[0005] In the context of the present invention, the expression "essentially" is understood to mean "almost completely" or "completely," and it should be considered that, for example, a portion of the inner surface of the second wall portion of the side wall that is already hidden from the direct line of sight by, for example, the portion to which the second wall portion of the side wall is attached to other parts is not necessarily hidden by the first wall portion. Furthermore, it is clear that the screening of the second wall portion relates to the inner surface of the second wall portion, i.e., the side of the second wall portion that faces the transparent pane.

[0006] The lack of realism / realistic effect was found to be due to the reflection of the backlit sidewalls, which appeared as blurred and smeared-out areas on the diffusing surface of the recessed panel. The problem with these blurred and smeared reflections is that the sky appears as a surface with areas of different colors visible along two or more sides of the recessed panel. As a result, the human eye can focus on the surface of the panel / light area, the origin of the color difference, which significantly reduces the sense of depth. Furthermore, the adverse effects of the reflection can be so strong, for example, when the entire circumference of the first wall is lit / backlit, that a distinctly visible circle of different colors appears in the center of the light area ("sky"), which further reduces the sense of depth. In addition, the overall illusion of the artificial skylight is also compromised, and the reference to the position of the sun in the sky disappears because there are no distinct shadows. While various options can be considered to solve these problems, most options have certain other disadvantages. For example, one option to mitigate the negative effects of a backlit sidewall is to reduce visibility by decreasing the light intensity of the backlit portion. However, at that point, the intensity of the artificial "sun" weakens, breaking the realistic illusion. Another option is to increase the vertical distance between the first wall and the recessed light area by deploying a more forgiving sky configuration, such as an indirectly lit (half) dome, ellipsoid, sphere, or a tubular cavity in any other integrating body (which functions as the sky). Furthermore, this comes at the cost of a significant increase in the total built-in depth of the device, especially for devices with large sky areas.Another option is to tilt the side walls outwards, as implemented by Mitsubishi Electric and COELUX, which have sloping side walls, so that light is hardly directed towards the light area (the sky).

[0007] The lighting system may be characterized in that the light area is formed by an LED panel having a diffusing surface, thus enhancing the effect of infinity. Such an LED panel may be LEDs mounted on a carrier combined with a separate diffuser or an integrated diffuser. The diffuser has the diffusing surface and is positioned between the carrier and a transparent pane. The separate diffuser may be spaced away from the carrier, or alternatively, positioned on the surface of the carrier. Furthermore, the diffuser is positioned between the array of LEDs and the transparent pane to diffuse the light emitted by the LEDs during operation.

[0008] The approach disclosed in this invention is to prevent blurring of the side wall reflection. This is achieved by placing a clear, transparent window between the recessed panel and one or more (rear-illuminated) side walls. Furthermore, upstream of the pane, a second wall section and a homogeneous diffuse lit surface, such as a very diffuse and homogeneous lit sky-blue recessed LED panel, are provided, and the viewing angle limiting frame height of the first wall section is large enough to limit the direct line of sight through the light exit window in the frame of the second wall section and the sky-panel, so as not to have witnesses to the origin of the sky, while at the same time providing a feeling of sufficient structural integrity of the (suspended) ceiling. It was found that the second wall section should not be visible through the transparent pane so as to reduce the realistic effect of the artificial window.

[0009] For example, the advantages of such clear pane or sheet materials made from PC, PMMA, or (window) glass are, - The sheet or pane functions as a semi-mirror, and - The glazing angle rays are redirected towards the opposing side wall, thereby reducing the amount of side wall light that could reach the diffuse surface of the embedded panel in the first place. That is the case.

[0010] The beneficial effect of having a clear intermediate pane of material between the light area and the first wall is that, as a first visual cue, the clear and distinct reflection of the "sunlit" inner first wall is clearly visible on both sides of the clear glass pane in symmetrical proportions. Furthermore, as a second visual cue, both the real and reflected images of the shadowed area provide clear guidance toward the position of the virtual sun in the air without the need to look at the sun. Furthermore, as a third cue, the glass pane also shows reflections (virtual images) of other objects in the space below the canopy, appearing as augmented images in the air at the focal plane beyond the surface of the glass pane. The fact that the second wall is hidden from direct line of sight through the light exit window by the first wall prevents potential, unrealistic disturbances of reflections (virtual images) due to the visibility of the second wall. Therefore, because the blue sky appears uniform, and there is no indicator to provide a measure of "distance" to the sky, the depth of the blue sky light area feels infinite.

[0011] Typically, the sidewalls have dimensions such that they can be considered as axial extensions around the light region; in other words, the sidewalls have dimensions such that they can be considered as walls around the light region, extending downstream and axially. Typically, the transparent pane is inherently non-diffusive and non-scattering and is positioned directly opposite the light region, i.e., there is no separate pane, sheet, or plate between the light region and the transparent pane, and substantially all light from the light region is incident directly on the transparent pane.

[0012] The lighting system may feature a transparent pane that is specular Fresnel reflective. The Fresnel reflection of a clear, specular transparent pane enhances the sense of depth and improves the suggestion of a real window, as the reflected image is more distinct. Typically, the lighting system may feature a transparent pane that extends across the full cross-sectional area Ra of a recess in the first wall to further enhance the desired realism of the artificial skylight solution.

[0013] The lighting system may have a first wall that is capable of emitting light. In addition to the light area, the first wall may be a light transmitting area, such as a side-lit light guide, or a light generating area, such as a rear-lit area or an OLED (and may be referred to herein as a light generating area), and the use of lighting in the side wall, which may have a light source, helps to enhance the realism of the lighting system. In this case, the light source is intended to replicate natural sunlight, let alone light from the moon or stars. When the light area and the first wall are illuminated in appropriate proportions, the artificial sky will have an even more enhanced and stronger sense of depth, extending far beyond the surface of a clear, transparent pane. Furthermore, some of the light emanating from the rear-lit side wall preferably reaches the opposing un-illuminated side wall surface to "neutralize" the bluish appearance of the side wall as a result of the blue sky engine. In this way, the illuminated (multiple) side walls compensate for the blue light entering from the artificial skylight, and therefore the recessed walls appear white (or any other color / color temperature of desired sunlight) to the observer. Apart from the color issue, the brightly lit recessed walls enhance the realism of the sunlight effect. The lighting system may be used as or included in an artificial window in the ceiling, or it may be used as or included in an artificial vertical window in the wall.

[0014] The lighting system may be characterized in that a side wall, a first wall portion of the side wall, and a second wall portion of the side wall are circumferentially arranged around a recess, and the first wall portion has a shape in which light is provided by at least one sub-wall (or part thereof) of the first wall portion, and a lighting arrangement for controlling at least one of the color, intensity, and contrast of the illumination. In this case, the lighting system has a circumferential side wall in which the first wall portion includes a set of sub-side walls, each sub-side wall including a rectangular light-emitting area. This defines a basic recess for a polygonal panel.

[0015] In the first example, which includes a set of side walls, each side wall may contain a rectangular light-emitting region formed from two independently controllable triangular light-emitting regions. When one triangle is illuminated, a distinct boundary effect can be produced, which can replicate the sharp lines produced by a distant point light source such as the sun. In this way, the illuminated shape of the triangle may appear to be produced by a light-transmitting or generating region illuminated by the sun. When both triangles are illuminated, the side wall may appear to be facing the sun, whereas when one triangle is illuminated, the side wall may appear to be positioned laterally to the sun. When neither triangle is illuminated, the side wall may appear to be in shadow.

[0016] In another example, which features a set of side walls, each side wall contains a rectangular luminescent region formed from four independently controllable triangular luminescent regions, each triangular luminescent region having its vertex at the center of the rectangular luminescent region. This means that the triangles can be defined by their inverted slopes. This means that the lighting system does not need to be directed in any special way to replicate the shadows cast by the sun.

[0017] In another example, with a set of sidewalls, two sidewalls each contain a rectangular light-emitting region formed from multiple independently controllable triangular light-emitting regions, each triangular light-emitting region having a vertex at one corner of the rectangular light-emitting region. This means that the triangles can be defined by various inclinations. This means that the lighting system can reproduce lines cast by the sun at different altitudes in the sky, representing different times of day. There may be four sidewalls, where two sidewalls (containing multiple triangles) face each other, and the other two sidewalls contain multiple rectangular light-emitting regions. The sidewalls positioned laterally (with respect to the direction of incident light from the sun) have triangles, while the front and back walls have rectangles. This means that all four sidewalls can be controlled to give an overall impression corresponding to sunlight illumination from a particular sun position. The light-transmitting or light-generating regions are typically rectangular or square, but other shapes are also possible.

[0018] The light source can provide a first color for light emitted in the direction normal to the light-generating region, and a second, different color for light emitted obliquely from the normal direction. For example, the second color may have a stronger blue component than the first color. This configuration functions as a system that provides an appearance that attempts to reproduce the appearance of an artificial skylight, i.e., a ceiling window, when illuminated by sunlight (direct sunlight or the kind of all-around light that would be seen, for example, on a cloudy day). This configuration provides a whiter, downward-facing work light representing the sun, and a bluer light in the other direction representing the daytime sky. Side wall lighting can prevent the side walls from appearing blue, which would not match the effect observed through a real window.

[0019] As explained above, a greater sense of realism can be achieved by creating clearly defined light / dark boundaries. These strategies can be used to significantly enhance the realism of artificial skylight solutions.

[0020] In the first configuration, the lighting system includes a transverse wall portion that extends radially in a transparent pane over a width Wt within a recess having a width Wr, in order to conceal the first wall portion having a height H1 and the second wall portion having a height H2 from the direct line of sight. H2 <= H1 * Wt / (Wr - Wt) It can have the characteristic of being such.

[0021] Alternatively, in the second configuration, the lighting system is offset radially from the second wall by a distance D within a recess having width Wr, where the first wall has height H1 and the second wall has height H2, in order to conceal it from the direct line of sight. H2 <= H1 * D / (Wr - 2 * D) It can have the characteristic of being such.

[0022] Thus, in both the first and second configurations, it is ensured that the second wall portion is not visible through the light exit window, and thus, it is ensured that the desirable realism of the artificial skylight is not adversely affected. In practice, the height H2 of the second wall portion can be virtually zero, but typically it is greater than zero. The second wall portion is the part of the side wall that is between the light region and the transparent pane and forms a very small space between the light region and the transparent pane. Further, preferably, the second wall portion has a small height H2, and the light region and the transparent pane are separated by a distance H2 in the range of 0.1 to 7.5 cm, preferably 0.5 to 5 cm, and most preferably 0.5 to 1.5 cm. In practice, otherwise, the size of the cross-sectional area Ra of the recess in the first wall portion becomes too small, and / or the height H1 of the first wall portion becomes too large, resulting in the built-in depth of the lighting system becoming too high. Thus, it has been found that the upper limit of the height H2 is 7.5 cm. Therefore, from this perspective, the height H2 should be as small as possible, and the preferred upper limit of H2 is 5 cm. On the other hand, the height H2 should be large enough to avoid optical contact between the light region and the transparent pane and thus should be at least 0.1 cm, but preferably is large enough to accommodate an object for further enhancing the realism of the artificial skylight solution. Thus, H2 is preferably in the range of 0.5 cm to 1.5 cm. To accommodate an object for further enhancing the realism, the lighting system can have the feature that at least one object selected from a handlebar, dirt, and artificial drops of birds-po, leaves, raindrops, and / or sand grains is placed on the clear pane or in the space between the light region and the clear transparent pane.

[0023] The lighting system can have the feature that the transparent pane is made of colorless transparent glass, PMMA or PC. These materials are typically used and convenient for use as window panes, are as similar as possible to actual window glass panes, and thus enhance the desirable realism of the artificial skylight solution.

[0024] The lighting system can have the feature that the second wall portion has a white diffusing reflecting surface facing the recess. Such a configuration of the second wall portion has been found to improve the effect of the second wall portion on the desirable realism of the artificial skylight solution as compared to other configurations of the second sidewall. Also, even when the second wall portion is not completely hidden unintentionally from the direct line of sight through the light exit window, the desirable realism of the artificial skylight solution is maintained satisfactorily.

[0025] The lighting system can have the feature that the first wall portion has a white diffusing reflecting surface facing the recess. Thus, the visibility of the reflection (virtual image) of the first wall portion in the clear transparent pane appearing as an extended image in the air is enhanced, and accordingly, the desirable realism of the artificial skylight solution is enhanced.

[0026] The first wall portion can emit white light and / or colored light, for example, with a Lambertian intensity distribution. Further, the lighting system can have the feature that the light region emits light having a color temperature or correlated color temperature in the range of 6500 to 20000 K, preferably in the range of 9000 to 15000 K, including the color temperatures of both overcast sky and clear blue sky. Additionally or alternatively, the lighting system can have the feature that the first wall portion emits light having a color temperature or correlated color temperature in the range of 3500 to 6000 K, preferably in the range of 4000 to 5500 K. In any of these solutions, the appearance of the sidewall can match the desired lighting effect from the light region.

[0027] The lighting system according to the present invention may be used as an artificial window or a recessed wall arrangement. In particular, indoor spaces such as offices, corridors, subways, underground shopping malls, stations, tunnels, hospitality areas, hospitals, airplanes, submarines, etc., where natural light is completely or partially absent, are application fields suitable for the lighting system according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Herein, the present invention is intended to clarify the invention rather than limit its scope, and is therefore further illustrated by schematic drawings, some of which are not to scale and may be exaggerated for illustrative purposes. [Figure 1] Figure 1 shows a first embodiment of the lighting system according to the present invention. [Figure 2] Figure 2 shows a second embodiment of the lighting system according to the present invention. [Figure 3] Figures 3A to 3B show the conditions for concealing the second wall portion according to the first and second embodiments. [Figure 4] Figure 4 shows a third embodiment of the lighting system according to the present invention. [Figure 5] Figure 5 shows a detailed cross-section of one embodiment of the light region. [Figure 6] Figure 6 shows a lighting system integrated into a suspended ceiling. [Modes for carrying out the invention]

[0029] Figure 1 shows a first embodiment of an artificial window, such as an artificial skylight, of the lighting system 1 according to the present invention. The lighting system includes a light region 3 (also called a light-generating region or light-transmitting region) extending across the principal axis direction 5, and a side wall 7 extending downstream from the light region, defining a recess 9 having a cross-section Ra. The light region is located at the bottom 15 of the recess, and a light exit window 13 is located downstream at the top 11 of the recess opposite the light region. The side wall includes a first wall portion 17 and a second wall portion 19 located upstream of the first wall portion, with a transparent pane 21 provided between the first and second wall portions. The second wall portion is hidden from direct line of sight through the light exit window by the first wall portion, and the first wall portion is radially offset from the second wall portion within the recess. This is further illustrated in Figure 3A. The transparent pane, light region, and second wall portion define a space 25 in which an object can be accommodated. The transparent pane is colorless and transparent, made of PMMA, and exhibits specular Fresnel reflection. The first wall is coated with a white diffuse reflective coating 27 of white paint. The light-generating region includes an outcoupling structure 45 and a side-illuminating light guide 33 equipped with an LED as a light source 35.

[0030] Figure 2 shows a second embodiment of the artificial window of the lighting system 1 according to the present invention. The second embodiment of the lighting system is similar to the first embodiment, except that the first wall 17 includes a lateral wall 29 extending radially with respect to the main axis 5 in the transparent pane 21 within a recess 9 to conceal the second wall 19 from the direct line of sight. This is further illustrated in Figure 3B. Furthermore, the second embodiment includes a relatively large space 25 formed by the light area 3, the transparent pane, and the second wall for accommodating an object 31, a leaf in the figure. Due to the relatively large height H2 of the second wall, the second wall may be unintentionally visible through the light exit window 13, and therefore the second wall is provided with a white diffuse reflective coating 27 of aluminum oxide.

[0031] Figures 3A-3B show the conditions for concealing the second wall according to the first and second embodiments. Figure 3A shows the lighting system 1 according to the first embodiment shown in Figure 1. In this first embodiment, the first wall 17 has a height H1 and, in order to conceal the second wall having a height H2 from the direct line of sight 23, it is offset from the second wall 19 by a distance D radially with respect to the main axis 5 within a recess 9 having a width Wr, which is the width of the light outlet window 13. H2 <= H1 * D / (Wr - 2 * D) That is the case.

[0032] Figure 3B shows the lighting system 1 according to the second embodiment shown in Figure 2. In this second embodiment, the first wall 17 has a height H1, and the second wall 19, which has a height H2, is hidden from the direct line of sight 23 through the light outlet window 13, and here it includes a lateral wall 29 extending radially in a transparent pane 21 with respect to the main axis 5 over a width Wt within a recess 9 having a width Wr, which is the width of the light generation region 3. H2 <= H1 * Wt / (Wr - Wt) That is the case.

[0033] Figure 4 shows a third embodiment of an artificial window, for example, a recessed wall portion, of the lighting system 1 according to the present invention. The lighting system includes a light region 3 extending across the principal axis direction 5 and a side wall 7 extending downstream from the light region, defining a recess 9 having a cross-section Ra. The light region is located at the bottom 15 of the recess, and a light exit window 13 is located downstream at the top 11 of the recess opposite the light region. The side wall includes a first wall portion 17 and a second wall portion 19 located upstream of the first wall portion, with a transparent pane 21 provided between the first and second wall portions. The second wall portion is hidden from direct line of sight through the light exit window by the first wall portion, and the first wall portion is radially offset from the second wall portion within the recess. The transparent pane, the light region, and the second wall portion define a space 25 in which an object can be accommodated. A portion 37 of the first wall portion 17 is translucent and is configured to emit light. Therefore, the first wall section is rear-illuminated by an array of LEDs 39 and includes a diffuser 41. When in operation, the aforementioned portion of the first wall section is illuminated, and the reflection of the aforementioned portion appears as a virtual image 43 in a clear, transparent pane, thus enhancing the desired sense of realism of the artificial window.

[0034] Figure 5 shows a detailed cross-section of one embodiment of the light region 3 as shown in Figure 4. The light-generating region includes a clear, light-transmitting light guide 33 that is laterally illuminated by LEDs 35 and has a light out-coupling structure 45 on the first side, on the first main surface 47 facing the reflector 49. A diffuser 53 is provided in front of the main surface 51 on the second side of the light guide. A clamp or housing wall 55 with a cover 57 is provided to shield the LEDs from direct view, maintain the relative positioning of various parts of the light-generating region, and attach the light-generating region to the second wall 19 (partially shown). In other embodiments, the light guide plate may be rear-illuminated instead of laterally illuminated, and at least one of the cover, reflector, and out-coupling structure may be omitted. The diffuser can scatter or homogenize the light by beam widening via refraction or TIR (total internal reflection).

[0035] Figure 6 shows a lighting system 1 incorporated into a false ceiling 59. Its first wall 17 and second wall (not shown) are circumferentially located around a recess 9. The first wall has a shape to which light is provided by a portion 61 of at least one sub-wall 65 of the first wall, and a lighting configuration (not shown, but seen in Figure 4) for controlling at least one of the color, intensity, and contrast of the illumination. Thus, the first side wall includes a light-emitting portion 61 and a triangular non-light-emitting portion 63. Thus, the effect of a sharp boundary 67 is produced, which replicates the sharp lines produced by a distant point light source such as the sun. In this way, the illumination shape appears to be produced by a light-transmitting or generating region illuminated by the sun. The bright light-emitting portion is reflected as a virtual image 43 in the transparent pane 21 and is clearly visible.

[0036] Finally, I would like to add the following: - The direct light path from the main surface 51 of the light guide (see Figure 5) to the light exit window and including the light exit (and therefore the light path that is not reflected by, for example, the first wall portion 17, see Figure 4) is essentially free from the diffuser (the reflection of the first wall portion 17 on the main surface 51 of the light guide appears unblurred / mirror-like / scatter-free from the outside downstream of the lighting system). The approach of the disclosure of the present invention is to prevent the sidewall reflection from becoming blurred. - The light area (3) is formed by a light guide illuminated by an LED (rear-illuminated, but preferably to the side) (see, for example, the description in Figure 5). - The illusion of an artificial sky being "visible around the corners" of the clear material pane is enhanced. This is achieved by i) limiting the view through the clear pane by making the surface area of ​​the clear pane smaller than the surface area of ​​the embedded sky panel positioned slightly away from the clear pane, and ii) providing an inner side wall that is sufficiently high relative to the height of the spacer. Thus, the artificial sky is perceived as "floating" above the clear pane without providing a finite-sized observer of the spacer and embedded panel.

Claims

1. A light area extending across the main axis and illuminated from behind by an LED, A side wall extending downstream from the light region defines a recess having a cross-section, A lighting system including, The light region is located at the bottom of the recess, and the light outlet window is located at the top of the recess opposite to the light region. The side wall includes a first wall portion and a second wall portion located upstream of the first wall portion. A transparent pane is provided between the first wall and the second wall, and is positioned directly opposite the light area. The second wall portion has a white diffuse reflective surface facing the recess, in this lighting system.

2. The lighting system according to claim 1, wherein the light region is formed by an LED panel having a diffusing surface.

3. The lighting system according to claim 2, wherein the LED panel comprises LEDs mounted on a carrier combined with a diffuser, and the diffuser is arranged on the carrier.

4. The lighting system according to any one of claims 1 to 3, wherein the transparent pane is specular Fresnel reflector.

5. The lighting system according to any one of claims 1 to 4, wherein the first wall portion is capable of emitting light.

6. The lighting system according to any one of claims 1 to 5, wherein the side wall, the first wall portion of the side wall, and the second wall portion of the side wall are circumferentially arranged around the recess, and the first wall portion comprises a lighting configuration for controlling the shape of the light provided by the first wall portion, and at least one of the color, intensity, and contrast of the illumination.

7. The first wall portion having height H1 includes a lateral wall portion extending radially in the transparent pane over a width Wt within the recess having width Wr, in order to conceal the second wall portion having height H2 from direct line of sight. H2<=H1*Wt / (Wr-Wt) The lighting system according to any one of claims 1 to 6.

8. The first wall portion having height H1 is offset radially by a distance D from the second wall portion having height H2 within the recess having width Wr, in order to conceal the second wall portion having height H2 from the line of sight. H2<=H1*D / (Wr-2*D) The lighting system according to any one of claims 1 to 6.

9. The lighting system according to any one of claims 1 to 8, wherein the light area and the transparent pane are spaced apart by a distance in the range of 0.1 to 7.5 cm.

10. The lighting system according to any one of claims 1 to 9, wherein the transparent pane extends over the entire cross-sectional area of ​​the recess in the first wall.

11. The lighting system according to any one of claims 1 to 10, wherein the transparent pane is made of colorless, transparent glass, PMMA, or PC.

12. The lighting system according to any one of claims 1 to 11, wherein the first wall portion has a white diffuse reflective surface facing the recess.

13. The lighting system according to any one of claims 1 to 12, wherein the light region emits light having a color temperature or color-correlated color temperature in the range of 6,500 to 20,000 K.

14. The lighting system according to any one of claims 1 to 13, wherein the first wall portion emits light having a color temperature or color-correlated color temperature in the range of 3500 to 6000 K.

15. An artificial window or recessed wall configuration, wherein the artificial window or recessed wall configuration includes a lighting system according to any one of claims 1 to 14.

Images