Arrangement for presenting information

Abstract

The invention relates to an arrangement for presenting information in an illuminated manner and comprises a controllable e-ink display (10) and an illumination unit disposed upstream of the display (10) and configured to illuminate the controllable display (10). The illumination unit comprises a planar light guiding element (20) and an illuminant (50), light emitted by the illuminant (50) being incoupled into the light guiding element (20) via a light incoupling side (21). The light guiding element (20) comprises structures (28) for outcoupling light from the light guiding element (20) and directing it at the display (10) in such a way that light reflected from the display (10) is emitted by the light guiding element (20) in a light emission direction (A) of the arrangement, the light guiding element (20) adjacent to the light incoupling side (21) comprising firstly a beam shaping region (25), in which the cross section of the light guiding element (20) widens.

Description

[0001] ARRANGEMENT FOR DISPLAYING INFORMATION

[0002] Description:

[0003] The present invention relates to an arrangement intended for the illuminated display of information. In particular, the present invention relates to a so-called escape sign light, which is intended to indicate, for example, the direction of an escape route.

[0004] Exit sign luminaires are used primarily in public buildings and areas and serve to indicate the direction of an escape route in the event of an emergency or hazardous situation, allowing people to safely leave a hazardous area. This is achieved by displaying illuminated pictograms whose size and shape are specified by relevant standards. Such exit sign luminaires typically also have their own power supply or at least an emergency power supply, ensuring that the relevant information is still displayed safely and reliably even in the event of a power failure.

[0005] Exit sign luminaires used to date are designed in such a way that the information to be displayed is applied to a plate-shaped, translucent element, for example in the form of a printed film or direct printing, whereby this element is then illuminated. This can be achieved, for example, by arranging a flat light source behind the plate-shaped element with the pictogram. Alternatively, it is also known to use a flat light guide into which light is coupled from the side. By means of multiple reflections, the light is distributed over the entire surface of the light guide and then coupled out laterally to illuminate the pictogram. In both cases, it is ensured that the information to be displayed is displayed with sufficient brightness to meet the corresponding requirements of the associated standard.

[0006] Providing the information to be displayed in the form of a print or a similar means means that the information is static and thus cannot be changed. Exit sign luminaires known to date can therefore generally only indicate a specific escape route direction and cannot react variably to specific situations. However, greater flexibility would be desirable in this regard, as the direction of an escape route could potentially change depending on the specific hazardous situation or the location of the hazardous situation. Accordingly, solutions are being sought to make the illuminated display of information using luminaires more flexible.

[0007] In principle, it would be conceivable to provide an escape sign luminaire in the form of a controllable active display. Modern displays, for example, based on so-called organic LEDs (OLEDs), are capable of displaying information in an illuminated manner, reliably meeting the corresponding requirements for escape sign luminaires regarding the brightness of the displayed information. Furthermore, this would provide the greatest possible flexibility with regard to the information presented. However, the power consumption of such active displays is relatively high, which contradicts the desire to operate escape sign luminaires continuously, especially in situations where the general power supply is unavailable due to an emergency.

[0008] A well-known alternative to such active displays is therefore displays based on so-called E-Ink technology, which is used in e-readers, for example, and which consumes significantly less power. Although the flexibility in displaying different colors and the speed at which the displayed information changes is significantly reduced compared to an active display, this would be perfectly sufficient for use as an escape sign.

[0009] However, no escape sign luminaires based on E-Ink technology are currently available. The problem is that the information to be displayed must be displayed with sufficient brightness according to the relevant standards for escape sign luminaires, and there are difficulties in meeting these requirements with E-Ink technology.

[0010] The present invention is therefore based on the object of providing an improved arrangement for the illuminated display of information, which enables the possibility of a flexible display of information in a high quality.

[0011] This object is achieved by an arrangement having the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

[0012] According to the inventive solution, flexibility with regard to the presentation of the information(s) to be displayed is achieved by using a controllable display based on E-Ink technology, as indicated above. Since so-called backlighting is not possible in this case, so-called frontlighting is used in such a display, in which light from a laterally guided light source shines onto the display from above and is reflected across the entire display. In order for the information to be displayed with sufficient brightness in this case, the amount of light generated by the light source must be correspondingly high, while at the same time ensuring that the display is illuminated as homogeneously as possible.To this end, the invention proposes designing a light-guiding element used to create the front light in such a way that, in a beam-forming region adjacent to a light-coupling side of the light-guiding element, the light-guiding element is configured in such a way that the cross-section of the light-guiding element expands in this region. It has been found that this measure can optimize the illumination of the controllable E-Ink display, so that, on the one hand, the information is displayed with uniform brightness and, on the other hand, with sufficiently high brightness. This ultimately opens up the possibility of using E-Ink technology in a very versatile way, particularly for creating, for example, an escape sign light. The inventive concept can, of course, also be used in conventional e-readers.

[0013] According to the present invention, an arrangement for the illuminated display of information is therefore proposed, which arrangement comprises: a) a controllable E-Ink display for the planar display of information to be displayed, and b) a lighting unit arranged upstream of the display, which is designed to illuminate the controllable display, wherein the lighting unit comprises:

[0014] • a plate-shaped light-guiding element, which has a light output side facing the display and a light input side essentially perpendicular to the light output side,

[0015] • a light source which is assigned to the light coupling side of the light guide element and is designed such that light emitted by the light source is coupled into the light guide element via the light coupling side,

[0016] • wherein the light-guiding element has structures on the light-output side for coupling light out of the light-guiding element and directing it onto the display, such that light reflected from the display is emitted by the light-guiding element in a light emission direction of the arrangement; and wherein, according to the invention, the light-guiding element has a beam-shaping region adjacent to the light-input side, in which the cross-section of the light-guiding element expands. As already mentioned, the use of the beam-shaping region is essential in that it ensures that the controllable display is actually illuminated evenly and homogeneously.Conventional light-guiding elements, which often take the form of uniformly thick plates, would instead entail the problem that the amount of outcoupled light in the area immediately adjacent to the light input side would be too high, which would ultimately lead to inhomogeneous illumination of the controllable display and thus an inhomogeneous display of the information to be presented. This problem is efficiently avoided with the help of the inventive solution.

[0017] It is preferably provided that the cross-section of the light-guiding element widens linearly or—particularly preferably—with a convex curve in the beam-shaping region, wherein, in particular, the side of the light-guiding element opposite the light-output side is then inclined or curved relative to a plane of the light-guiding element. It is particularly preferably provided that, in a projection perpendicular to the plane of the light-guiding element, the beam-shaping region is located outside the display.

[0018] It has also proven advantageous if the thickness of the light-guiding element increases by approximately 20%-30% from the light coupling side in the beam-shaping area. In this case, the light can be shaped or focused particularly efficiently, allowing it to be used for homogeneous illumination of the display.

[0019] The light from the lamp is used, as already explained, to illuminate the front of the display. This means that the light is first coupled out of the light-guiding element in the direction of the display, then reflected by the light-guiding element and then emitted by the light-guiding element in the light emission direction of the arrangement. In this case, it is preferably provided that the light-guiding element is optically coupled to the display on the light output side, preferably via an adhesive whose refractive index is slightly lower than the refractive index of the light-guiding element. A deviation in the refractive index is necessary insofar as it allows the structures used for light output to be used efficiently for homogeneous illumination of the display. However, as already explained, the deviation in the refractive index should not be too great. In particular, it has proven advantageous to replace the adhesive with silicone or a so-calledOptically Clear Adhesive (OCA) containing acrylic, wherein, for example, the light-guiding element can have a refractive index of approximately 1.5 and the coupling layer a refractive index of 1.4. The homogeneity of the front illumination of the display can be further optimized by continuously decreasing the thickness of the light-guiding element in the region in which it is coupled to the display towards a side opposite the light coupling side. In this case, the thickness of the light-guiding element in the region in which it is coupled to the display can be in particular between 0.1 mm and 4.0 mm, preferably between 0.5 mm and 4.0 mm.

[0020] An elongated LED-based light source is preferably used as the light source for the front illumination of the controllable display. In this case, it is particularly preferred that the light source is designed to emit light whose color location lies just below Planck's white light curve. The reason for this is that, in the case of an escape sign luminaire, the information should be displayed with a white point specified by the corresponding standard. However, the measures for light guidance and light extraction result in the light actually generated by the light sources being slightly altered in terms of its spectral composition. It has been shown that the desired white point with regard to the displayed information can be achieved particularly well if the light initially lies slightly below the Planck curve, as explained.

[0021] As already mentioned, a preferred application of the present invention is its use in an escape sign luminaire, in which the illuminated display of a pictogram is achieved with the aid of the arrangement according to the invention. In this case, according to a further development of the invention, it can be provided that, viewed in the light emission direction of the luminaire, a further, plate-shaped, translucent element is provided downstream of the light-guiding element, which is designed to optionally display a symbol. This additional symbol is then superimposed on the information presented by the display and could, for example, be used to indicate a malfunction of the luminaire.

[0022] In this case, it can be provided that the translucent element is formed by a further light-guiding element with a light-emitting means arranged on a narrow side, wherein the further light-guiding element has an arrangement of light-outcoupling structures corresponding to the symbol to be displayed, which are designed to locally couple out the light coupled into the further light-guiding element by the light-emitting means. Alternatively, it would also be conceivable to form the translucent element by a layer structure with an active, controllable layer designed to locally emit light in the form of the symbol to be displayed. In particular, it can be provided that the symbol superimposed on the display is displayed in red.

[0023] Overall, the present invention provides a novel solution that allows for the flexible presentation of information. Particularly efficient and homogeneous illumination of the display used for this purpose means that the arrangement can also be used, in particular, to create an escape sign. Naturally, the present invention also improves the properties of a classic e-reader.

[0024] The invention will be explained in more detail below with reference to the accompanying drawings. They show:

[0025] Figure 1 is a perspective view of an escape sign luminaire;

[0026] Figure 2 schematically shows the possibility of additionally overlaying the information displayed by the escape sign luminaire with a symbol;

[0027] Figure 3 is a sectional view of a preferred embodiment of an escape sign luminaire according to the invention;

[0028] Figure 4 shows the components used for the front lighting of the controllable display;

[0029] Figure 4a is an enlarged view of part of Figure 4 and

[0030] Figure 5 is an exploded view of the luminaire according to Figure 3.

[0031] As already explained, a particularly preferred application example for the present invention is its use in an escape sign luminaire, which is why such a luminaire will be described in detail below. However, it should be expressly noted that the arrangement according to the invention can also be used in other device types, in particular in e-readers.

[0032] Figure 1 initially shows a conventional escape sign luminaire 100, which is intended to indicate the direction of an escape route. In particular, this is achieved by displaying an illuminated pictogram 150, which is provided on a flat side of the approximately cuboid-shaped luminaire housing 110. In solutions known from the prior art, this pictogram 150 is usually in the form of a printed foil or a printed disc, which is then backlit accordingly. In this case, changing the display of the pictogram 150 is not possible, so that a specific direction for the escape route can be permanently displayed.

[0033] The present invention now provides the possibility of changing the display of the direction of the escape route. This means that the orientation of the arrow 151 shown in Figure 1 can be changed as needed to reliably indicate the direction in which the corresponding area can be most safely exited, depending on the respective hazardous situation. According to the relevant standard, the pictogram 150 must be displayed at a certain brightness, and the inventive concept offers a corresponding solution for this.

[0034] In addition, within the scope of a particularly advantageous development, the luminaire 100 according to the present invention may offer the possibility, as indicated in Figure 2, of superimposing an additional symbol on the representation of the pictogram 150. By way of example, Figure 2 shows that a malfunction of the luminaire 100 can be indicated using a cross 155, for example, shown in red, thus providing an observer with additional feedback regarding the reliable function of the luminaire 100. The corresponding measures for implementing this development will be explained in detail later.

[0035] The fundamental idea of ​​the inventive concept, however, is to use a so-called e-ink display to display the pictogram 150. Such displays are known in particular from so-called e-readers, but are also used in control elements, for example, in building automation systems. Compared to an active display, such e-ink displays consume significantly less power. Although they are less flexible in terms of the speed at which the information to be displayed changes, the corresponding properties of an e-ink display are fundamentally sufficient for the preferred application of the present invention.

[0036] The basic principle of such E-Ink displays is that they consist of microcapsules arranged in a matrix-like manner, containing colored particles that are positively or negatively charged depending on their color. Depending on the polarity of an applied electric field, the corresponding particles migrate to the top of the microcapsules and thus become visible, so that this area appears in the form of a pixel in the corresponding color. The advantage of this solution is that the electric field for controlling a corresponding pixel does not have to be maintained permanently, so power consumption is extremely low compared to an active display. At least within limited limits, it is now also possible to display different colors.The options available are sufficient, particularly for use as an escape sign luminaire, since the representation of the pictogram 150 shown in Figure i is generally done using the colours white and green.

[0037] However, since the pixels implemented in an E-Ink display do not emit any light themselves, it is essential that the display is illuminated accordingly for use as an escape sign luminaire. Backlighting, as is the case with conventional escape sign luminaires, is not possible. E-Ink displays are therefore illuminated using what is known as frontlight technology, in which light is directed onto the display from the front, so that it is reflected by the display and then emitted accordingly. While the requirements regarding brightness and homogeneity of the lighting are not too high when used in the form of e-readers or control elements for building management systems, these requirements are very high if the luminaire is to be used as an escape sign luminaire. Accordingly, no luminaires of this type are currently available.

[0038] The present invention now provides a way to actually realize an E-Ink-based escape sign luminaire while meeting the corresponding requirements regarding light output. The measures provided for this purpose will be explained in detail below with reference to Figures 3 to 5.

[0039] The basic structure of the luminaire 100 according to the invention can be seen in the sectional view shown in Figure 3 and the exploded view shown in Figure 5. The rear area contains the actual luminaire housing 110, which is formed by two interconnected housing parts 111 and 112 and houses the essential components for controlling the E-Ink display and for the power supply. The fastening or mounting of the luminaire 100 and the connection to the general power supply are also carried out via the housing 110.

[0040] However, the components arranged on the front of the housing 110, which initially comprise the E-Ink display 10 already mentioned several times, are essential for the light emission and display of the information to be displayed. As already mentioned, this display is designed to be controllable such that the pictogram 150 displayed on the display 10 can be at least partially changed. Particularly in the case where the luminaire 100 is to be used as an escape sign luminaire, the display 10 is designed to enable at least a two-color display in the colors green and white.

[0041] The use of the E-Ink display 10 for depicting an escape route is made possible in a decisive way by the components for illuminating the display 10. These include, in particular, a plate-shaped light-guiding element 20, which is arranged downstream of the E-Ink display 10 as seen in the radiation direction A. Between the two components is a further layer for optical coupling 30, which will be discussed in more detail below.

[0042] As can be seen in particular from the sectional views of Figures 3 and 4, the light-guiding element 20 serves to initially decouple the light coupled in from the front side by a light source 50 (shown only in Figure 4) in the direction of the E-Ink display 10 in a planar manner, such that the display 10 is illuminated as evenly and homogeneously as possible. The light is then reflected by the display 10 and emitted through the light-guiding element 20 in the direction of the light emission direction A, such that it is visible to an observer. The observer is accordingly able to perceive the representation of the pictogram 150 on the E-Ink display 10 with sufficient brightness.

[0043] The function of the light-guiding element 20 is crucial for this front-light illumination of the display 10. As shown in Figures 3 and 4, the light-guiding element 20 is essentially plate-shaped and of a similar size to the display 10. The light-guiding element 50 is arranged on a narrow side 21, in the illustrated embodiment on an upper side of the light-guiding element 20, with this side 21 then forming the light-coupling side of the light-guiding element 20. The light from the light-guiding element 50 is coupled into the light-guiding element 20 via the light-coupling side 21 and is then initially distributed evenly over the surface of the light-guiding element 20 in the usual manner by means of multiple reflections.

[0044] On the light-outcoupling side 22 of the light-guiding element 20 facing the display 10, structures 28 for light extraction are provided, the function of which is to redirect incident light rays L such that they are directed onto the display 10 in the desired manner described above and subsequently reflected by it. A preferred embodiment has proven to be structures with a cross-section that are approximately trapezoidal in shape with steep flanks or truncated cone-shaped structures, although other forms of light-outcoupling structures would also be conceivable. In the region of these light-outcoupling structures 28, the light-guiding element 20 is optically coupled to the display 10, which is achieved with the aid of the aforementioned coupling layer 30, which is realized using an adhesive.The refractive index of this coupling layer 30 is slightly below the refractive index of the light-guiding element 20 in order not to negatively impair the function of the light-outcoupling structures 28. For example, if the light-guiding element 20 has a refractive index of 1.5, the refractive index of the adhesive is preferably 1.4. In this case, the light-guiding element 20 could be made of PMMA, PC, or glass, while silicone or another so-called optically clear adhesive (OCA), which contains acrylic, is preferably used for the adhesive for optical coupling. These materials have proven particularly effective in achieving the required coupling between the light-guiding element 20 and the display 10, while uniform illumination of the display 10 is nevertheless ensured with the help of the aforementioned light-outcoupling structures 28.

[0045] However, the decisive factor for the efficient and homogeneous illumination of the display 10 is the question of how the light from the illuminant 50 is coupled into the light-guiding element 20. In this context, it has been found that a plane-parallel design of the light-guiding element 20 would result in a very large amount of light being coupled out in the direction of the display 10 at an early stage in the immediate vicinity of the light-coupling side 21. This not only leads to inhomogeneous illumination of the information to be displayed, but also to insufficient brightness in more distant areas, which is why, according to the present invention, a special design of the light-guiding element 20 is provided in the area adjacent to the light-coupling side 21.

[0046] As the sectional views according to Figures 3 and 4 show in particular, the light guide element

[0047] 20 is designed in cross-section in such a way that it is initially directly connected to the light coupling side

[0048] 21 adjacent to a so-called beam-shaping region 25. This is characterized in that the cross-section of the light-guiding element 20 - in a plane perpendicular to the plane of the light-guiding element 20 or the display - widens in this beam-shaping region 25 starting from the light-input side 21, wherein this widening can occur either linearly or - particularly preferably - slightly convexly curved on the light-emitting side 23 of the light-guiding element 10 opposite the display 10. The beam-shaping region 25 lies in a projection perpendicular to the plane of the light-guiding element 20 outside the region in which the light-guiding element 20 is optically coupled to the display 10, so that here this region of the light-guiding element 25 initially serves merely to redirect the coupled-in light rays in a suitable manner.In particular, the special design of this beam-shaping region 25 prevents light rays entering the light-guiding element 20 at relatively steep angles from impinging prematurely on light-coupling structures 28 and thus being directed onto the display 10. Instead, such rays are at least slightly redirected by the corresponding shape of the beam-shaping region 25 such that they can be more efficiently transmitted to the underside within the light-guiding element 20. The homogeneity of the illumination of the display 10 is thereby dramatically improved, so that ultimately, even with a very high amount of light emitted via the illuminant 50 and coupled into the light-guiding element 20, the display 10 is extremely uniformly illuminated.

[0049] Across the beam-forming region 25, i.e., from the light coupling side 21 to the region in which light is coupled out to the display 10, the cross-section, or more precisely the thickness d of the light-guiding element 20, preferably increases by approximately 20 to 30%. As can be seen in particular from the sectional view of Figure 4, the thickness of the light-guiding element 20 can then decrease slightly and continuously again across the region in which the light-guiding element 20 is coupled to the display 10, which additionally contributes to homogeneous illumination of the display 10. The thickness d of the light-guiding element can preferably be between 0.1 and 4.0 mm, particularly preferably between 0.5 mm and 4.0 mm.

[0050] The transmission of the light emitted by the illuminant 50 within the light-guiding element 20, as well as the coupling via the optical connection layer 30 and the back-reflection from the display 10, results in the light emitted by the illuminant 50 being slightly spectrally altered before it is ultimately perceptible to an observer. When used as an escape sign luminaire, a specific white point is prescribed for the light emission of the white light. To meet this requirement, the illuminant 50, which is particularly preferably formed by an elongated LED board with white light LEDs, is preferably designed such that the emitted light initially lies slightly below the Planck white light curve. The effects described above regarding the light transmission then result in the ultimately emitted light meeting the requirements of the standard with regard to its color location.

[0051] Ultimately, the measures discussed result in the information being presented on the display 10, or perceived by an observer, being displayed with high brightness and high uniformity. The components used for this purpose are held to the luminaire housing 110 by a frame 70, which may also have a translucent cover 71 on the front. This effectively protects all components of the luminaire 100 from external influences, in particular from high levels of humidity and / or dust.

[0052] The frame 70 also serves to accommodate the means already mentioned above for additionally superimposing the display representation with a further symbol 155. This is a further translucent light-guiding element 60, which initially allows the light reflected by the display 10 in the light emission direction A to pass through unhindered. Only if necessary can this further light-guiding element 60 be used to display an additional symbol 155, in the present exemplary embodiment a red cross completely covering the pictogram of the display 10, which indicates a malfunction of the lamp 10.

[0053] In the present exemplary embodiment, the further light-guiding element 60 is arranged parallel to the first light-guiding element 20, with light-guiding means being arranged on the upper side of the light-guiding element 60, which light-guiding means couple light into the front side of this light-guiding element 60. The symbol 155 to be displayed is then formed by the corresponding arrangement of light-coupling structures 65, which locally emit the light from these further light-guiding means to the front side, i.e. in the light emission direction A. The colored display of the symbol 155 is achieved in that the light emitted by the associated light-guiding means already has the desired color, in this case red. The further light-guiding element 60 itself, however, is color-neutral, so that when the further light-guiding means are not activated, it does not impair the display of the pictogram 150 using the display 10.

[0054] As an alternative to the previously described variant, in which the additional symbol 155 is again displayed via a correspondingly designed plate-shaped light-guiding element 60, it would also be conceivable to use a translucent layer structure to display the symbol 155, which—analogous to the structure of a so-called organic LED—has an active region for generating light. This layer structure is again designed such that, in the inactive state, it does not influence the display of the pictogram 150. In the active state, however, light in the corresponding color is emitted locally according to the shape of the symbol 155 to be displayed, in order to overlay the symbol 155 on the pictogram 150.

[0055] As an alternative to using organic LEDs, it would also be conceivable to equip the active layer with micro-LEDs, which also do not initially affect the light output for displaying pictogram 150 when inactive. However, when the micro-LEDs are activated, they emit light corresponding to the desired symbol in the direction of the light beam.

[0056] As already mentioned, the additional display of this symbol represents a further development that can be used optionally. In principle, however, this option could also be used regardless of the way the pictogram is displayed. In other words, these additional means for superimposing the additional symbol could also be used with a conventional escape sign luminaire. Overall, the present invention thus provides a luminaire that offers the possibility of displaying information in a flexible manner, with the light output and thus the perceptibility of the information to be displayed being of extremely high quality.

Claims

Claims:

1. Arrangement for the illuminated display of information, comprising: a) a controllable E-Ink display (10) for the planar display of information (150) to be displayed, and b) a lighting unit arranged upstream of the display (10), which is designed to illuminate the controllable display (10), wherein the lighting unit comprises: • a plate-shaped light-guiding element (20) which has a light output side (22) facing the display (10) and a light input side (21) substantially perpendicular to the light output side (22), • a light source (50) which is assigned to the light coupling side (21) of the light-guiding element (20) and is designed such that light emitted by the light source (50) is coupled into the light-guiding element (20) via the light coupling side (21), • wherein the light-guiding element (20) has structures (28) on the light-output side (22) for coupling out light from the light-guiding element (20) and directing it onto the display (10) such that light reflected from the display (10) is emitted by the light-guiding element (20) in a light emission direction (A) of the arrangement, • and wherein the light-guiding element (20) has a beam-forming region (25) adjacent to the light coupling side (21), in which the cross section of the light-guiding element (20) widens.

2. Arrangement according to claim 1, characterized in that in the beam-forming region (25) the cross section of the light-guiding element (20) widens in a linear or convexly curved manner, wherein in particular the light emission side (23) of the light-guiding element (20) opposite the light coupling-out side (22) is inclined or curved.

3. Arrangement according to claim 1 or 2, characterized in that in a projection perpendicular to the plane of the light-guiding element (20), the beam-forming region (25) is located outside the active region of the display (10).

4. Arrangement according to one of the preceding claims, characterized in that that the thickness (d) of the light-guiding element increases by approximately 20% to 30% starting from the light coupling side (21) in the beam-forming region (25).

5. Arrangement according to one of the preceding claims, characterized in that the light-guiding element (20) is optically coupled to the display (10) on the light output side (22), preferably via a coupling layer (30) formed by an adhesive whose refractive index is slightly lower than the refractive index of the light-guiding element (20).

6. Arrangement according to claim 5, characterized in that the adhesive of the coupling layer (30) is formed by silicone or an optically clear adhesive, OCA, which contains acrylic.

7. Arrangement according to claim 5 or 6, characterized in that the thickness of the light-guiding element (20) in the region in which it is coupled to the display (10) decreases continuously towards a side opposite the light coupling side (21).

8. Arrangement according to claim 7, characterized in that the thickness of the light-guiding element (20) in the region in which it is coupled to the display (10) is between 0.1 mm and 4.0 mm, preferably between 0.5 mm and 4.0 mm.

9. Arrangement according to one of the preceding claims, characterized in that the illuminant (50) is designed to emit light whose color locus lies below the Planck curve.

10. Arrangement according to one of the preceding claims, characterized in that the illuminant (50) is formed by an elongated LED board, which preferably has a plurality of white light LEDs.

11. Luminaire (100) for the illuminated display of information, in particular an escape sign luminaire, comprising an arrangement according to one of claims 1 to 10.

12. Luminaire according to claim 11, characterized in that, viewed in the light emission direction (A) of the luminaire (100), a plate-shaped, translucent element is provided downstream of the light-guiding element (20), which is designed for the selective display of a symbol (155) superimposed on the display (10).

13. Luminaire according to claim 12, characterized in that the light-transmitting element is formed by a further light-guiding element (60) with a light-emitting means arranged on a narrow side, wherein the further light-guiding element (60) has an arrangement of light-coupling structures (65) corresponding to the symbol (155) to be displayed, which is designed to couple out the light coupled into the further light-guiding element (60) by the light-emitting means in the light emission direction (A) of the luminaire (100).

14. Luminaire according to claim 12, characterized in that the light-transmitting element is formed by a layer structure with an active layer which is designed to emit light in the form of the symbol (155) to be displayed, wherein the active layer preferably has OLEDs or micro-LEDs for displaying the symbol.

15. Luminaire according to one of claims 11 to 14, characterized in that the symbol (155) is displayed in red.

16. E-reader comprising an arrangement according to one of claims 1 to 10.

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