Cabin lighting with electronic paper reflector

Abstract

The invention relates to a lighting arrangement (30) for a passenger cabin (4) of a passenger aircraft (2), comprising a multicolour-capable light source (16) with an adjustable source spectrum (22) of its source light (20), a total area (34) which is irradiated directly by the source light (20), a paper arrangement (36), the paper colour (PF) of which can be adjusted and which is formed by electronic paper (38) in a paper area (40) as part of the total area (34), and a remaining neutral area (42) of the total area (34), the neutral area not being part of the paper area (40). The invention also relates to a passenger cabin (4) comprising the lighting arrangement (30) in the assembled state (M) and comprising the cabin surface (32), the total area (34), the paper area (40) and the neutral area (42). In a method for operating the lighting arrangement, a desired paper colour (PF) and a target colour (ZF) for a sensor region (51) are selected, and a control unit (52) ascertains the suitable source spectrum (22) and / or the paper colour (PF).

Description

[0001] RT / ND / dk

[0002] Cabin lighting with electronic paper reflector

[0003] The invention relates to the lighting of a passenger cabin of a passenger aircraft.

[0004] In practice, lighting / illumination of the passenger cabin is often desired where the color of the light can be changed or adjusted / selected as desired.

[0005] From DE 10 2015 007 888 A1, a straight lighting module with multiple light sources is known. The lighting module can be seamlessly connected to identical lighting modules at its ends and has a light cone that produces a light strip extending laterally and transversely from the lighting module onto an illuminated surface, extending at least over the entire length of the lighting module. A luminaire contains at least two seamlessly connected lighting modules and a single interface for individually controlling the color and brightness of the respective lighting modules. A wall element for the interior of a vehicle comprises a wall surface to be illuminated and a lighting device for illuminating it, wherein the lighting device contains multiple lighting modules.

[0006] The object of the present invention is to propose improvements with regard to the lighting in a passenger cabin of a passenger aircraft.

[0007] The problem is solved by a lighting arrangement according to claim 1. Preferred or advantageous embodiments of the invention and of other invention categories will become apparent from the further claims, the following description and the accompanying figures.

[0008] The lighting arrangement is designed for a passenger cabin of a passenger aircraft. "Designed for" means that the lighting arrangement is structurally adapted to and configured for use in specific passenger cabins / aircraft types; for example, it is designed for the resulting geometric and system requirements, etc. In other words, the specific passenger cabins in question are assumed to be known with regard to their geometric and system requirements, etc. Specifically, the following characteristics of the passenger cabins are assumed:

[0009] The invention assumes that the passenger cabin has an inner cabin surface. The inner cabin surface is the surface facing the interior, i.e., the actual passenger cabin.

[0010] The lighting arrangement includes a light source. This light source is multi-colored, meaning it can emit not only white light but also colored light, such as red, green, blue, etc. The light source can also comprise several individual light sources / luminaires distributed throughout the passenger cabin. The light source is therefore adjustable with respect to the spectrum of the emitted light. This applies to at least one of the aforementioned individual light sources, which can be adjusted collectively or individually. Changing the spectrum thus alters, in particular, the color of the light currently generated or emitted by the light source. "Color" here is always to be understood in the sense of both color and / or brightness. However, the focus here is on the cabin's color scheme, which is why brightness will not be explicitly mentioned.

[0011] The lighting arrangement has a total surface area, or such a total surface area is assigned to it. The total surface area is that portion of the cabin surface which – when the lighting arrangement is installed in the passenger cabin and in operation – is directly illuminated by the source light.

[0012] The invention, in the sense described above, assumes that the light source – in its operational and installed state – is located at a specific installation point in the passenger cabin, from which it shines into the passenger cabin. It illuminates / irradiates a portion of the inner cabin surface directly, i.e., in a straight line with the emitted source light. This directly illuminated portion of the cabin surface then constitutes the total area.

[0013] The lighting arrangement includes a paper arrangement. The paper arrangement consists of at least one or more electronic papers. Such a paper is, in particular, a so-called EPD (electronic paper display). In other words, the entirety of the electronic papers constitutes the respective paper arrangement. The paper arrangement, or the electronic papers, are—in the assembled state, see above—applied to a paper surface. The paper surface is a specific part or section of the total surface and is therefore smaller than the total surface. In other words, in the assembled state, a specific part, i.e., not the entire total surface, is covered, encased, or clad with electronic paper. The entire covered portion of the total surface is referred to as the paper surface.

[0014] The paper arrangement is adjustable with regard to its color. The paper is not self-illuminating, but rather a commercially available electronic paper known from practical experience, which has no active luminescent properties and is not backlit. According to the invention, the paper is illuminated solely by the ambient light / external light that is already present in the cabin. In this case, this is exclusively the source light from the light source.

[0015] Only through external lighting, particularly the source light, does the paper appear colored to a viewer. The paper arrangement can be monochromatic, meaning it appears to the viewer in a single, desired color (set paper color) at any given time, for example, white, red, blue, or green. However, it can also be multicolored, meaning it can display a pattern, text, symbols, graphics, or similar elements in different colors at any given time.

[0016] Thanks to the adjustable paper color, a desired paper color can be selected. This desired paper color is the color / spectrum of the light emanating from the paper. It is the scattered light reflected by the paper, and therefore depends on both the currently selected spectrum of the light source and the currently set paper color. For the sake of simplicity, the term "scattered" here encompasses scattering, reflection, and filtering of light by the object / surface in question, in this case, the paper.

[0017] The remaining area not belonging to the paper surface is a neutral surface. This neutral surface is also illuminated by the source light, but its light properties, particularly its color, scattering, filtering, and reflection properties, are neither alterable nor adjustable. In other words, it is a typical passive surface, such as the surface of a wall or ceiling panel, a partition, a monument, etc., in a passenger cabin.

[0018] Above all, the neutral surface cannot be changed with regard to its color. According to the invention, it is possible, with a selected source spectrum of the source light, in other words, a selected color of the source light emitted by the light source, to nevertheless generate additional color effects in the passenger cabin by changing, i.e., adjusting or selecting, the paper color of the paper arrangement.

[0019] According to the invention, it is therefore possible to adjust the color of the light in the passenger cabin without requiring an additional light source besides the multicolor-capable light source. The color change is achieved by the paper arrangement, which is passive in terms of light generation, i.e., it does not actively emit light itself. Thus, color effects or lighting effects can be achieved in the passenger cabin in a particularly simple and cost-effective manner.

[0020] In a preferred embodiment, at least part, and in particular the entire, paper surface is at least part, and in particular the entire, ceiling surface, i.e., the surface of a passenger cabin ceiling. In other words, the paper surface is attached to the area of ​​the passenger cabin ceiling so that its color representation or color scheme can be adjusted by selecting the paper color. Thus, color effects can be achieved on the cabin ceiling using electronic paper without the need for a separate lighting system.

[0021] In a preferred embodiment, at least a part, and in particular the entire, neutral surface is at least a part, and in particular the entire, storage compartment surface (surface of a storage compartment) and / or side surface of the passenger cabin. The storage compartment surface is the surface of storage compartments contained in the passenger cabin that faces the interior, i.e., the passenger cabin. The side surface is any other surface that is not a ceiling or a storage compartment surface, e.g., the surface of side panels, partitions, monuments, etc., in the passenger cabin.

[0022] Since the neutral surface, which is not color-changing, is also directly illuminated by the light source, scattering from this surface creates an indirect lighting component in the passenger cabin. This component is not influenced by the color of the paper surface, but only by the source spectrum. This can serve as general or neutral lighting in the passenger cabin. Thus, by changing the paper color, the electronic paper can be used alongside the neutral lighting for targeted coloring or effects in the cabin without having to alter the general lighting (source spectrum). The total light present on an object in the passenger cabin is composed of the portion of the source light scattered by the neutral surface and the remaining portion scattered by the paper.

[0023] In a preferred embodiment, the lighting arrangement includes a control unit. The control unit is configured to control the light source with respect to its source spectrum and the paper with respect to its paper color, i.e., to specify / control current values ​​for these. With the aid of the control unit, it is therefore possible, in particular, to coordinate the light source and paper so that light and light effects of the desired color are produced in the passenger cabin, especially the desired paper color described above. The desired paper color is the color that a viewer sees when looking directly at the paper. Thanks to the control unit, both the ambient lighting in the cabin (source light, diffused by the neutral surface) and the effect lighting (source light, diffused by the paper surface) can be controlled.

[0024] In a preferred embodiment, the lighting arrangement includes at least one sensor. The sensor, when installed, is directed at a sensor area on the cabin surface or within the cabin. The sensor provides a current sensor signal, which is correlated with the current illumination state of the sensor area. In other words, the sensor detects the current illumination color / light color and brightness, etc., within the sensor area in the passenger cabin. The control unit is configured to control the light source (i.e., its source spectrum) and / or the paper (i.e., its paper color) based on at least one of the sensor signals. According to this embodiment, parameter-dependent control, particularly regulation, of the desired paper color and / or the ambient lighting in the passenger cabin is possible, depending on the actual lighting conditions within the cabin.The lighting conditions in the passenger cabin can be adjusted particularly well.

[0025] In a preferred embodiment, a target color is specified for at least one of the sensor areas. The control unit is then configured to control the light source and / or the paper based on at least one of the sensor signals such that the illumination state of the relevant sensor area exhibits the target color. In particular, the control unit can be configured to take into account or maintain a specific desired paper color while still setting a specific target color in the sensor area. Thus, for example, it can be achieved that objects or items in the target area in the cabin are illuminated with a desired light color / spectrum, even though the paper surface, i.e., the electronic paper, emits a specific desired paper color. In other words, passengers in the passenger cabin see the paper surface in a desired color, while other things (e.g.,(an object at the target area) in the passenger cabin, however, illuminated under desired lighting conditions / desired light, e.g. with neutral white light.

[0026] In a preferred embodiment of the above design, the control unit contains a selection of presets. Each preset includes a specific source spectrum and / or a specific paper color. The lighting arrangement can then be selectively operated according to one of the available presets. In other words, during operation of the lighting arrangement, a specific setting / combination of source spectrum and / or paper color can be selected, adjusted, or switched from a number of presets to produce the desired lighting in the passenger cabin.

[0027] The object of the invention is also achieved by the aforementioned passenger cabin. This cabin contains the lighting arrangement according to the invention, the cabin surface, the total area, the paper surface, and the neutral area. The lighting arrangement is located in the passenger cabin in its assembled state.

[0028] The passenger cabin and at least some of its possible embodiments, as well as their respective advantages, have already been explained in substance in connection with the lighting arrangement according to the invention. In particular, the preferred embodiments mentioned above in connection with the lighting arrangement also constitute preferred embodiments of the passenger cabin.

[0029] The object of the invention is also achieved by a method according to claim 9. This method serves to operate the lighting arrangement in the embodiment described above, including the control unit and sensor. In this method, a desired paper color is selected. In other words, the color properties of the paper are chosen, specifically how it scatters or filters incident source light, i.e., how a viewer would perceive the paper under the current illumination with source light when looking directly at the paper surface. The desired paper color is therefore the color of the light emitted by the paper into the passenger cabin (scattered / reflected / filtered source light).

[0030] Furthermore, the process involves selecting a target color for at least one of the sensor areas.

[0031] The control unit then determines the source spectrum and / or paper color in such a way that the desired paper color and the target color are set in the passenger cabin. In other words, by adjusting the source spectrum and / or paper color, lighting is created in the passenger cabin where the paper surface appears in the desired paper color, and the desired illumination of the desired light color (target color) is also achieved in the sensor range. This makes determining the source spectrum and paper color particularly easy.

[0032] In a preferred embodiment, the control unit determines the source spectrum and / or the paper color as follows: It evaluates the source spectrum of the source light, the scattering spectra of the paper array and the neutral surface, and the spectra of the source light scattered by the paper array and the neutral surface. It then corrects the source spectrum and / or the paper color, and thus the scattering spectrum of the paper surface, to match the desired spectra of the source light scattered by the paper array and the neutral surface. In other words, the control unit operates based on spectral analysis. This allows the control unit to operate particularly simply and effectively.

[0033] The invention is based on the following findings, observations, and considerations and further comprises the following preferred embodiments. These embodiments are sometimes referred to simply as "the invention." The embodiments may also include parts or combinations of the embodiments mentioned above, correspond to them, and / or may include previously unmentioned embodiments.

[0034] According to the invention, a lighting system (lighting arrangement) consists of an adjustable spectrum luminaire (light source, adjustable source spectrum) and a dynamic EPD reflector (electronic paper, adjustable paper color). The system comprises a luminaire (light source) and a surface (paper surface) on which an EPD display (electronic paper display) is mounted. The EPD display and the luminaire are capable of full color. Since the lighting system (its control unit) knows the current ceiling color (paper on the ceiling, currently selected paper color), it can adjust the spectrum of the luminaire (source spectrum) so that the ceiling (paper) is illuminated with the highest possible color fidelity, and the surroundings (interior of the passenger cabin, in particular the sensor area) are illuminated with the highest possible CRI (Color Rendering Index).

[0035] The invention is based on the following practical observations: In most passenger cabins, general cabin lighting is primarily achieved via ceiling lighting, where the light shines onto the ceiling and is reflected from there into the cabin. If a colored effect is desired on the ceiling, then the cabin is also illuminated in that color.

[0036] An alternative solution from practice is: A glass light fixture with a customizable pattern is integrated in the middle of the ceiling panel and illuminated.

[0037] Another alternative solution from practice is: The ceiling is illuminated with a separate light, and the (rest of the) cabin with a different light (or optic) in order to achieve different colors on the ceiling and (rest of the) cabin.

[0038] The invention is based on the following fundamental idea: The ceiling is covered with colorable EPDs (paper). The lights on the ceiling (light sources) illuminate the colored surface (paper arrangement), thus creating the effect of a colored sky. At the same time, however, the lights shine downwards into the cabin (illuminating the neutral surface, from where the light is emitted into the rest of the cabin) in a different color.

[0039] The EPD (paper layout) can be divided into segments that allow for shapes, patterns, logos, or even text, such as "Wi-Fi on". The EPD is controlled and powered primarily by the ballasts of the ceiling lights. The protocol is capable of controlling both the ceiling light as a whole (light sources) and the segments of the EPD (paper layout) (i.e., setting / selecting / changing the source spectrum and paper color). This enables effects such as motion, sunrise simulation, and switching between corporate design patterns and logos.

[0040] Furthermore, the spectra of the luminaire (source spectrum) and the EPD (paper color) are used. The EPD has several colors that can be switched between. The respective reflection of the spectra can be measured and stored. If a desired effect is to be achieved both on the ceiling (on the paper) and in the (rest of the) booth (neutral surface, interior) with regard to color and brightness, CRI, etc., the spectrum of the luminaire (source spectrum) illuminating the EPD (paper, paper arrangement) is adjusted so that the spectrum of the luminaire is convolved with the reflected spectrum of the EPD in order to achieve the desired spectrum on the ceiling as well as in the booth.

[0041] This can be done with the help of a higher-level control system, or saved scenarios in the luminaire (settings in the lighting arrangement).

[0042] According to the invention, the following advantages arise:

[0043] • Effect in the aircraft

[0044] • New design options: Patterns in the EPD

[0045] • Movement, both of color and pattern

[0046] • Low power consumption

[0047] • Holistic approach to lighting systems and EPD

[0048] • The last state of the image is retained even when the power is off.

[0049] • Achieving color effects, positive influence on color psychology

[0050] • different CRIs, compared to solutions known from practice

[0051] According to the invention, the cabin's color scheme can be created by illuminating it with a white light source. Furthermore, a segmented, dynamic, large-area ceiling design is possible. Different colors on the ceiling and cabin, as well as high color quality within the cabin, are achievable.

[0052] Further features, effects, and advantages of the invention will become apparent from the following description of a preferred embodiment of the invention and the accompanying figures. Figure 1a shows, in each case in a schematic diagram, a previously known passenger cabin without a paper surface, equipped with a multicolor light source emitting white light, and

[0053] Figure 1b red light,

[0054] Figure 2a shows a passenger cabin according to the invention with additional paper surface made of electronic paper with the paper color set to red and white source light, and

[0055] Figure 2b with the paper color set to green,

[0056] Figure 3a for the situation from Figure 2a, the compensation of the red tint in a sensor area by changing the source light,

[0057] Figure 3b shows the corresponding correction of the green tint according to Figure 2b,

[0058] Figure 4a Spectra in the situation according to Figure 2a with a red tint,

[0059] Figure 4b Spectra during compensation of the red tint according to Figure 3a.

[0060] Figure 1a shows a section of a passenger aircraft 2, specifically its passenger cabin 4. A cross-section through the passenger cabin 4 is shown; the plane of the sheet corresponds to a transverse plane 6 of the passenger aircraft 2, which runs perpendicular to its longitudinal axis (not shown). The passenger aircraft 2 is a single-aisle aircraft with a single aisle 12. A ceiling 8 of the passenger cabin and two storage compartments 10 are shown, located (viewed in the longitudinal direction of the passenger aircraft 2) to the left and right of the aisle 12 of the passenger cabin 4, respectively. The ceiling 8 is painted white, thus having a white surface 24. Also shown, but only symbolically, is an object 14 inside the passenger cabin 4, here a bowl filled with white rice, a meal for a passenger (not shown) in the passenger cabin 4.

[0061] The passenger cabin 4 has an interior cabin surface 32. The cabin surface 32 is the entirety of all surfaces of the passenger cabin 4 facing the interior, in particular the ceiling 8 and the storage compartments 10. A portion of the cabin surface 32 forms a total area 34. The total area 34 is that part of the cabin surface 32 which, in operating mode B of the light source 16, is directly illuminated by its source light 20 from the light channel 18. In Figure 1a, this is exclusively the ceiling 8. The color components of the source light 20 (and also of other light in the cabin, see below) are represented as follows: The red component is shown as a solid line, the green component as a fine dashed line, and the blue component as a coarse dashed line.

[0062] Figure 1a shows passenger cabin 4 with a lighting system known from practical applications. The multicolor light source 16 is positioned in the light channel 18 between the ceiling 8 and the storage compartment 10 in such a way that it directly illuminates only the ceiling 8 of passenger cabin 4. In this example, the light source 16 emits its source light 20 with a source spectrum 22 that corresponds to white light. In other words, a currently white-emitting light source 16 illuminates the white ceiling 8. The white ceiling 8 reflects or scatters all wavelengths of the source light 20 evenly into the room, i.e., passenger cabin 4, here indicated by the scattering S. White objects, such as object 14, namely the bowl of white rice in this room, i.e., passenger cabin 4, also appear white to an observer 26 (arrow 44). The observer 26 is symbolically represented here by their human eye.

[0063] Figure 1b shows the situation from Figure 1a, except that the source spectrum 22 of the source light 20 has been changed and the light source 16 now emits red light as source light 20. The white ceiling 8 is now illuminated with red source light 20. Therefore, due to the scattering S of red light, all objects in the passenger cabin 4 appear red to the observer 26 (arrow 44), such as object 14, since only wavelengths of the red spectrum (source spectrum 22) are present in the passenger cabin 4.

[0064] Figure 2a shows a passenger cabin 4 according to the invention, which is essentially the same as that shown in Figures 1a and 1b. It also features the ceiling 8, storage compartments 10, central aisle 12, object 14, cabin surface 32, light channel 18, and light source 16. The passenger cabin 4 now includes a lighting arrangement 30 according to the invention. Here, the light source 16 is arranged differently in the light channel 18 such that it directly illuminates not only the ceiling 8 but also a portion of the storage compartments 10. The total area 34 therefore includes the ceiling 8 and a portion of the surface of the storage compartments 10.

[0065] The lighting arrangement 30 includes the light source 16. Here, the lighting arrangement 30 is in an installed or mounted state M in passenger cabin 4, which is a designated passenger cabin 4 for the lighting arrangement 30. That is, the lighting arrangement 30 is tailored to passenger cabin 4 and takes its characteristics into account. The lighting arrangement 30 also encompasses the total area 34, or rather, the latter is assigned to the lighting arrangement 30.

[0066] The lighting arrangement 30 also includes a paper arrangement 36. The paper arrangement 36 contains an electronic paper 38 mounted on a paper surface 40. The paper surface 40 is a real part, and thus a section, of the total area 34, and is therefore smaller than the total area 34. In this example, the paper surface 40 is the part of the total area 34 that corresponds to the ceiling 8. The paper arrangement 36 is adjustable with respect to its paper color PF. In other words, the current reflection, scattering, or filter spectrum of the paper arrangement 36 or the papers 38 can be changed / selected / adjusted. The paper color PF is the color that an observer 26 perceives when looking at the paper 38 illuminated with white ambient light.

[0067] The remaining part of the total area 34, which is not paper area 40, is a neutral area 42. In this example, the neutral area 42 is that part of the surface of the storage compartments 10 which is directly illuminated by the source light 20. The color of the neutral area 42 cannot be changed, as it consists of the white painted surfaces of the storage compartments 10.

[0068] Figure 2a shows the following situation: The ceiling 8 is equipped with a color-changing EPD film in the form of paper 38 or paper arrangement 36. The paper color PF is currently set to "red". Depending on the selected color of the ceiling 8 or paper 38, the color composition of the reflections R and scattering S of the source light 20 in the passenger cabin 4 also changes. Color components not present in the ceiling color, i.e., the paper color PF – here red – (green, blue) are absorbed in the electronic paper 38 during scattering S. Only a small portion of the total emitted source spectrum 22 is totally reflected (reflection R) across the surface of the film, i.e., the electronic paper 38, and illuminates the remaining cabin surface 32.

[0069] In the figure, this is represented by a thinner arrow after the first reflection R. As a result, the red component of the light dominates in the passenger cabin. This is true even in the situation shown in Figure 2a, where the light source 16 is positioned so that it also shines directly onto the white reflective surface, namely the neutral surface 42. Nevertheless, an increased red component is present in the entire system, i.e., in the entire passenger cabin 4.

[0070] Objects that are actually "white," such as the rice shown here, are no longer illuminated uniformly with all wavelengths and therefore acquire a color cast, in this case a red cast. This is represented by an arrow 44 of bright red light, which is perceived by an observer 26 when looking at object 14. The blanket 8 or the paper 38, on the other hand, is perceived by the observer 26 as a strong red (arrow 46).

[0071] Figure 2b shows an alternative operating mode B of the lighting arrangement 30 at a later time. Here, the paper color PF of paper 38 is switched from "red" to "green". Thus, if the ceiling 8 is displayed in green, the red and blue components of the white source light 20 are significantly reduced during diffusion S (not shown here, as assumed to be zero). As a result, predominantly green light waves prevail in the room, i.e., passenger cabin 4, and the actually white rice in the bowl, i.e., object 14, appears greenish to the observer (arrow 44). In contrast, the observer 26 perceives the ceiling 14 as a rich green (arrow 46).

[0072] The selected colors "red" and "green" in Figures 2a and 2b are specifications V2 and V3 of a selection A from specifications V1 (white), V2 (red), V3 (green), and V4 (blue) for the paper color PF. This selection A is contained in a control unit 52 of the lighting arrangement, which is explained in more detail below. Among other things, the control unit is connected to a sensor 50, here a camera, which, in operation B, senses a sensor area 51, here on object 14, for its color relationships.

[0073] The lighting arrangement 30 therefore includes the sensor 50, which is implemented here as a camera. The sensor 50 is directed at the sensor area 51, here at the surface of the rice. In addition to changes in the source spectrum 22 and paper color PF, the sensor 50 can also take into account other influences on the light color in the passenger cabin 4, such as the color of the floor (not shown) or other interior furnishings of the passenger cabin 4. The control unit 52 can then correct this. The correction can also be dynamically controlled. Figure 3a shows the situation from Figure 2a, that is, the paper color PF of the ceiling 8 or the paper 38 is again selected as "red". In the situation according to Figure 3a, however, the "red tint" according to Figure 2a in the passenger cabin 4 is to be avoided / corrected. Therefore, a different source spectrum 22 in the source light 20 or paper 38 is used.The light source 16 is selected in which the red component is adjusted relative to the green and blue components, namely reduced (thinner line in Figure 3a). To avoid the red tint, the red component of the source spectrum 22 is reduced, or (alternatively, not shown) the blue and green components are increased. The exact ratio can only be determined if the paper color PF of the EPD (electronic Paper Display), i.e., the paper 38, is known to the luminaire, i.e., light source 16, and is determined here via the sensor 50 in the room.

[0074] If the deviation (in Figure 2a, the rice appears reddish instead of white), the light source 16 can adjust its emitting spectrum, source spectrum 22, as shown in Figure 3a, so that the white object 14 appears white again to the observer 26 (arrow 44). Thus, the target color ZF for the sensor area 51 is set to "white". When viewing the ceiling 8 or the paper 38, however, the observer 26 still perceives red light as desired (arrow 46). The corresponding adjustment is made by the control unit 52, which is configured to control the light source 16 with respect to its source spectrum 22 and the paper 38 with respect to its paper color PF, depending on the sensor 50 or its sensor signal (not shown).

[0075] Figure 3b shows the corresponding situation from Figure 2b, where the "green tint" is also compensated for or avoided. Here, either the green component of the light source 16 and thus of the source light 20 in its source spectrum 22 is reduced (thinner arrow), as shown in Figure 3b, or alternatively (not shown) the blue and red components are increased. The target color ZF in sensor area 51 is therefore again "white".

[0076] Figure 4a shows spectra for the situation in Figure 2a (reddish tint). Represented symbolically are the emitted spectrum of the light source 16, i.e., the source spectrum 22, and a reflection or scattering spectrum 60 of the paper arrangement 36, i.e., the ceiling 8, here with a significantly increased red component 80. Together, these two (indicated by brackets in Figure 4a) result in a spectrum 62 of the light scattered from the ceiling 8 (scattering S), which, according to arrow 46, is perceived by the observer 26. This also falls on the object as component 64 (paper light), i.e., ceiling light or light emanating from the electronic paper 38.

[0077] 14. Indicated by an arrow in Figure 4a

[0078] Figure 4a also shows the source spectrum 22 together with a reflection or scattering spectrum 66 of the neutral surface 42, i.e., the cabin surface 32 in the area of ​​the storage compartments 10. Both together lead (brackets in the figure) to a spectrum 68 of the source light 20 reflected / scattered by the neutral surface 42. This also reaches the object 14 as a further component 70 (arrow, neutral surface light).

[0079] Figure 4a further shows the spectrum 72 of the light scattered or reflected by object 14, as perceived by the observer 26 (arrow 44). A slightly increased red component 80 is shown here in a thickened area within an otherwise "white" spectrum, which is responsible for the reddish tint in the situation according to Figure 2a.

[0080] According to Figure 3a, the control unit 52 is now set up as explained above in such a way that, based on the known spectra or spectral properties of the passenger cabin 2 shown in Figure 4a, including paper 38, neutral surface 42, etc., it selects the paper color PF (the reflection or scattering spectrum 60 of the paper arrangement 36) and the source spectrum 22 so that the desired spectrum 72 is produced as a "white" spectrum.

[0081] Figure 4b, corresponding to Figure 3a, shows the spectral distributions in passenger cabin 2. Here, a red correction has been added to the otherwise unchanged white source spectrum 22, meaning the red component 82 has been slightly reduced (shown thickened in the figure). Thus, ceiling 8 (spectrum 62, component 64) will appear with a less intense red component 84.

[0082] Light with a slightly reduced red component 84 (spectrum 68, component 70) will now also emanate from the neutral surface 42. The spectrum 72 of the object light, on the other hand, is now white as desired. Reference symbol list

[0083] 2 passenger aircraft

[0084] 4 passenger cabin

[0085] 6 Cross plane

[0086] 8 ceiling

[0087] 10 storage compartments

[0088] 12 Middle aisle

[0089] 14 objects

[0090] 16 light sources

[0091] 18 light channel

[0092] 20 Source light

[0093] 22 Source spectrum

[0094] 24 Surface (ceiling)

[0095] 26 viewers

[0096] 30 Lighting arrangement

[0097] 32 cabin surface

[0098] 34 Total area

[0099] 36 Paper arrangement

[0100] 38 paper (electronic)

[0101] 40 paper area

[0102] 42 Neutral area

[0103] 44 Arrow (object)

[0104] 46 Arrow (ceiling)

[0105] 50 Sensor

[0106] 51 Sensor area

[0107] 52 Control unit

[0108] 60 Scatter spectrum (paper)

[0109] 62 Spectrum (paper light)

[0110] 64% share (paper light)

[0111] 66 Scattering spectrum (neutral area)

[0112] 68 Spectrum (Neutral Area Light)

[0113] 70% share (neutral area light)

[0114] 72 Spectrum (object light)

[0115] 80 Red component (increased) 82 Red component (decreased)

[0116] 84% red (ceiling)

[0117] B Operation M Assembly status

[0118] PF paper color

[0119] R Reflection

[0120] S dispersion

[0121] A selection

[0122] V1-4 Template

[0123] ZF target color

Claims

PATENT CLAIMS 1. Lighting arrangement (30) for a passenger cabin (4) of a passenger aircraft (2), wherein the passenger cabin (4) has an inner cabin surface (32), - with a multi-color capable light source (16) which is adjustable with respect to a source spectrum (22) of the source light (20) emitted by it, - with a total area (34), wherein the total area (34) is that portion of the cabin surface (32) which is directly illuminated by the source light (20) in an assembly state (M) and in operation (B) of the lighting arrangement (30) in the passenger cabin (4), - with a paper arrangement (36) formed from at least one electronic paper (38) and applied in the assembly state (M) to a paper surface (40), wherein the paper surface (40) is a real part of the total surface (34), - wherein the paper arrangement (36) is adjustable with respect to its paper color (PF), - wherein the remaining total area (34) not belonging to the paper area (40) is a neutral area (42).

2. Lighting arrangement (30) according to claim 1, characterized in that at least a part of the paper surface (40) is at least a part of a surface of a ceiling (8) of the passenger cabin (4).

3. Lighting arrangement (30) according to one of the preceding claims, characterized in that at least a part of the neutral surface (42) is at least a part of a surface of a storage compartment (10) and / or a side wall of the passenger cabin (4).

4. Lighting arrangement (30) according to one of the preceding claims, characterized in that the lighting arrangement (30) includes a control unit (52) which is configured to control the light source (16) with respect to its source spectrum (22) and the paper (38) with respect to its paper color (PF).

5. Lighting arrangement (30) according to claim 4, characterized in that - the lighting arrangement (30) includes at least one sensor (50) directed at a sensor area (51) of the cabin surface (32), and from which a sensor signal correlated with the current lighting state of the sensor area (51) is provided, - wherein the control unit (52) is configured to control the light source (16) and / or the paper (38) depending on at least one of the sensor signals.

6. Lighting arrangement (30) according to claim 5, characterized in that - a desired paper color (PF) was chosen as the color of the source light (20) scattered from the paper (38) into the passenger cabin (4), - a target color (F) is specified for at least one of the sensor areas (51), - and the control unit (52) is configured to control the light source (16) and / or the paper (38) depending on at least one of the sensor signals such that the illumination state of the relevant sensor area (51) has the target color (F).

7. Lighting arrangement (30) according to one of claims 4 to 6, characterized in that the control unit (52) has a selection (A) of specifications (V1-4), - where each specification (V1-4) contains a specific source spectrum (22) and / or a specific paper color (PF), - the lighting arrangement (30) can be operated according to one of the selectable specifications (V1-4).

8. Passenger cabin (4), - with the lighting arrangement (30) according to one of the preceding claims, - with the cabin surface (32) and the total area (34) and the paper area (40) and the neutral area (42), - wherein the lighting arrangement (30) is located in the passenger cabin (4) in the assembly state (M).

9. Method for operating the lighting arrangement according to any one of claims 5 to 7, wherein: - a desired paper color (PF) is selected which is the color of the light emitted by the paper (38) into the passenger cabin (4), - a target color (ZF) is selected for at least one of the sensor areas (51), - the control unit (52) determines the source spectrum (22) and / or the paper color (PF) such that the desired paper color (PF) and target color (ZF) are set in the passenger cabin (4).

10. Method according to claim 9, characterized in that the control unit (52) determines the source spectrum (22) and / or the paper color (PF) by evaluating the source spectrum (22) of the source light (20), the scattering spectrum (60) of the paper arrangement (36), the scattering spectrum (66) of the neutral surface (42), the spectrum (62) of the source light (20) scattered by the paper arrangement (36), and the spectrum (68) of the source light (20) scattered by the neutral surface (42).

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