DE102014003527A1 - Aircraft lighting device for the cabin of an aircraft and aircraft with the aircraft lighting device - Google Patents

Abstract

The invention has for its object to propose a lighting device for a mobile whose variability and / or integration capability is improved. Herzu is proposed a lighting device 1 for a mobile with an LED lighting device 2 for outputting an illumination light and with a light distribution body 3, wherein the LED lighting device 2 is arranged in or on the light distribution body 3, so that the illumination light is coupled into the light distribution body 3 and is distributed distributed over the surface, wherein the light distribution body 3 consists of a flexible plastic.

Description

The invention relates to an aircraft lighting device for the cabin of an aircraft with an LED illumination device for outputting an illumination light and having a light distribution body, wherein the LED illumination device is arranged in the light distribution body, so that the illumination light is coupled into the light distribution body and decoupled distributed. The invention also relates to an aircraft with the lighting device.

A majority of lamps operate on the principle that a light source, such as a light bulb, light emits light possibly under penetration of a panel or lens on the objects to be illuminated. An alternative principle can be implemented, for example, by coupling the light from a light source into a light-conducting body and then decoupling it from the light-conducting body in another location in order to illuminate objects. This type of lighting has the advantage that the lighting means itself can be concealed, for example, and the observer perceives only the light-conducting body.

For example, the document discloses DE 10 2004 007 555 A1 an interior light with high transparency and translucence, especially for vehicles with glass roof. The inner light lamp comprises at least one lens and a light coupling element, wherein the light is coupled into a lateral narrow side of the lens and wherein the lens has light refraction structures for coupling out the light at a vehicle interior facing surface of the lens. For example, such an interior light lamp can be integrated into a vehicle with a transparent roof, without significantly affecting the view to the outside.

The invention has for its object to propose an aircraft lighting device for the cabin of an aircraft, whose variability and / or integration capability is improved. This object is achieved by an aircraft lighting device with the features of claim 1 and by an aircraft with the aircraft lighting device having the features of claim 15. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

The invention thus relates to an aircraft lighting device for the cabin, in particular passenger cabin, in particular for illuminating the interior or the interior of an aircraft cabin.

The aircraft lighting device, in the following also briefly lighting device, comprises an LED lighting device, which is designed to output an illumination light. The LED lighting device can be monochrome or polychrome. For example, the LED illumination device can only have white LEDs, in alternative embodiments of the invention, the LED illumination device can also have LEDs in different colors, so that they can output a mixed color light as illumination light.

The illumination device comprises a light distribution body, wherein the LED illumination device is arranged at least in sections in or on the light distribution body such that the illumination light is coupled into the light distribution body. Particularly preferably, the light path between the LED lighting device, in particular between the LEDs of the LED lighting device, and the interior of the light distribution body is material-bonded, in particular formed free of space. Particularly preferably, the refractive index of the materials between the LEDs and the interior of the light distribution body is always greater than 1.2.

The light distribution body is designed such that the illumination light is coupled out flatly. Particularly preferably, the coupling-in area is smaller than the decoupling surface. In particular, the sum of the surface sections at an interface of the light distribution body is understood by the coupling surface, through which the illumination light is passed. The outcoupling surface is to be understood in particular as the sum of the surface sections at an interface of the light distribution body through which the illumination light is passed. Thus, the light distribution body is formed on the one hand for light distribution and the other to the light pipe.

For example, the light distribution body can have coupling-out structures, such as, for example, grooves, dots, nubs, on the surface, which support a coupling-out of the illumination light. In product-related embodiments invention, the decoupling surface is greater than 5 square centimeters, preferably greater than 10 square centimeters.

In the context of the invention, it is proposed that the light distribution body is made of or consists of a transparent, flexible silicone material, in particular mixed or blended with fire retardants or fire-retardant materials and / or substances. In particular, the light distribution body is elastic, in particular flexurally elastic, and / or flexible. Particularly preferred is the light distribution body with respect formed rubbery on the flexibility. In a preferred embodiment of the invention, the light distribution body or its material has a modulus of elasticity which has a value of E <10 MPa, preferably E <5 MPa.

The advantage of the invention is that the lighting device is implemented so flexible that it can adapt in shape to any support structures. It is thus possible, for example, for the light distribution body to adapt to a bent section of a supporting structure by flexibly changing its shape and thus being able to rest flat against the supporting structure. The radius of the bending of the support structure and / or the radius of the light distribution body that can be achieved by a flexible bend is preferably less than five meters, in particular less than two meters. It is also possible that the light distribution body adapts to freely curved surfaces. Thus, with the lighting device various installation situations can be operated, whereby the variability and / or the integration capability of the lighting device is increased.

As a result, it is possible that two such lighting devices, which are of identical construction, can be installed in the same application, but in a different installation situation, on support structures with different curvatures and / or different bends and adapt differently to the surfaces. Thus, the lighting device is designed as a common part for different installation situations. This valuable property means that in equipping interiors with different installation situations not a variety of structurally different lighting devices are provided, but only a corresponding number of identical lighting devices are needed. This advantage continues with the supply of spare parts, as spare parts only need to be stocked for one type.

In a preferred embodiment of the invention, the light distribution body is translucent and / or transparent. Particularly preferably, the light distribution body is realized crystal clear, so that the light pipe of the illumination light can be implemented particularly effectively and / or lossless. In alternative embodiments of the invention, scattering bodies are arranged in the light distribution body, so that the illumination light is scattered in the light distribution body in the light pipe.

In a preferred embodiment of the invention, the lighting device is designed as a wall lighting, wherein the lighting device is placed with the surface extension of the light distribution body on the wall or parallel to the wall. The wall can - as previously described - be curved and / or curved, wherein the curvature or bending can be compensated by the flexible light distribution body.

In a preferred structural embodiment of the invention, the LED lighting device is designed as an LED strip, in particular as a flexible LED strip, or a flexible printed circuit board (FPC) with LED assembly. Both structural embodiments allow not only the light distribution body can be flexibly adapted to the installation situation, but also the LED lighting device is designed to be flexible and / or bendable.

In a preferred structural embodiment of the invention, the light distribution body is designed as a mat section with an upper side, a lower side and at least one side surface. The mat portion may be formed in plan view of the top, for example, as a rectangle, so as a whole as a cuboid. However, it is also possible that the mat section has a free form in plan view, so it is conceivable, for example, that this has a designed or thematic outer shape, such as a sun, a moon, a tree, etc. It is provided that the LED illumination device for coupling the illumination light is arranged on the side surface. This ensures that the mat section can be adapted over a large area to the contour of a support structure.

In a preferred embodiment of the invention, the illumination device has a reflection element, which is particularly preferably designed as a flexible reflection element, such as a reflection foil. The reflection element is arranged in the light distribution body for reflection of the light illumination light. In particular, the reflection element is surrounded on all sides by the light distribution body. In this embodiment, the reflection element can already be integrated in the production of the light distribution body in this and thus does not constitute a separate component to be mounted.

In a possible development of the invention, the light distribution body is - as already described - formed as a mat section. In this embodiment, it is preferred that the LED illumination device is arranged for coupling to the underside or on the upper side of the mat section and the reflection element is arranged so that it deflects the illumination light vertically, so that it spreads flat in the light distribution body.

In another embodiment of the invention, the light distribution body is formed as a snake portion, wherein the snake portion, for example, has a rectangular, square, round or oval cross-section. In one possible embodiment of the invention, the LED illumination device is arranged on an end face of the snake section. In this embodiment, the illumination light is coupled into the snake section and guided over its length. It is preferred that the illuminating light is coupled out flat over the length of the serpentine section. For this purpose - as already described - light extraction structures may be present.

In another embodiment of the invention, the light distribution body is formed as the coil portion, wherein the LED illumination device is disposed on a side surface of the coil portion. For example, the LED illumination device extends parallel to the longitudinal extension of the snake section. In the embodiment that the LED lighting device and the light distribution body are both flexible, the lighting device can take any course as a light snake in the installation situation.

In a preferred constructive embodiment of the invention, the LED illumination device is at least in the transition region of the illumination light between the LED illumination device and the light distribution body with the light distribution body materially connected and in particular potted or sprayed. In particular, the LEDs of the LED illumination device are connected in a material-bonded manner to the light distribution body. In this way it is ensured that coupling losses between the LED lighting device and the light distribution body are minimized. For example, the LEDs with their plastic domes directly adjoin the base material of the light distribution body and are bonded to it in a material-locking manner.

Particularly preferably, the LED illumination device is cast into the light distribution body or injected in the plastic injection molding process.

With respect to the material of the light distribution body, it is preferable that it is formed as a thermoplastic elastomer. This material has the advantage that it can be cast or sprayed, so that the production of the light distribution body can be implemented favorably.

Particularly preferably, the material has a silicone content in order to achieve the flexibility of the light distribution body. Examples of such a material are the silicones TSE 3032 or TSE 3033 of the company Momentive Performance Materials Inc ..

In a preferred embodiment of the invention, it is ensured that the material of the light distribution body FST-compliant (Flammability, Smoke, Toxicity) is formed.

Another object of the invention relates to an aircraft with the lighting device as described above or according to one of the preceding claims. The lighting device is used in a passenger interior of the aircraft, for example as accent lighting. Preferably, the lighting device is placed on a support body, which is curved and / or bent, wherein the lighting device, in particular the light distribution body, flexibly occupies the same curvature or bending of the support body.

In a preferred embodiment of the invention, at least two identical lighting devices are used in the aircraft, wherein the lighting devices differ by their curvatures and / or bends on the respective support bodies.

Further features, advantages and effects of the invention will become apparent from the following description of preferred embodiments of the invention and the accompanying figures. Showing:

1 a lighting device in a three-dimensional view as a first embodiment of the invention;

2a , b is a three-dimensional representation of a further illumination device as a further embodiment of the invention in a schematic three-dimensional view;

3 another example of a lighting device in a sectional view;

4 in the same representation as 3 another embodiment;

5 in the same representation as the 1 a further embodiment of the lighting device.

The 1 shows in a schematic three-dimensional view of a lighting device 1 for an interior, z. B. for an interior or passenger compartment of an aircraft, as an embodiment of the invention.

The lighting device 1 includes an LED lighting device 2 as a light source and a light distribution body 3 , The LED lighting device 2 is formed as an LED strip, which has a plurality of LEDs 4 having. The LEDs 4 may have the same color, for example white. But it can also be different, colored LEDs 4 act.

The light distribution body 3 is translucent and / or transparent and has in this embodiment an upper side 5 , a bottom 6 and several side surfaces 7 on. The surfaces of the top 5 and the bottom 6 are each larger than the areas of the side surfaces 7 educated. On one of the side surfaces 7 is the LED lighting device 2 arranged. The other side surfaces 7 can just be trained, like this in the 1 however, in modified embodiments, these can also be curved or have a free form, for example a motif shape.

The LED lighting device 2 is with the light distribution body 3 coupled such that an illumination light of the LED illumination device 2 in the light distribution body 3 decoupled and decoupled distributed. For this purpose, the light distribution body 3 for example, coupling-out structures 8th which has a total reflection on the sides 5 . 6 and or 7 of the light distribution body 3 to disturb. It is also possible that the coupling-out structures 8th - as the graphically in the 1 is displayed - limited to a limited area, which then has a decoupling area 9 of the light distribution body 3 forms. The decoupling area 9 is greater than the coupling-in range for the illumination light of the LED illumination device 2 , Instead of or in addition to the decoupling structures 8th The light distribution body can also have scattering elements in the volume, which lead to a distribution of the illumination light. The edge length of one of the side surfaces is z. B. more than 10 cm.

To avoid coupling losses between the LED lighting device 2 and the light distribution body 3 To minimize, is already in the production of the light distribution body 3 to the LED lighting device 2 poured or molded. For example, the light distribution body becomes 3 produced via an injection molding or casting process - generalized urgeformt -, wherein the LED lighting device 2 in the manufacturing process already in physical contact with the matrix of the light distribution body 3 is brought.

The light distribution body 3 is in particular not formed of hard plastic, but flexible, in particular elastic and / or flexible realized. In particular, the light distribution body 3 formed rubbery. It can thus be elastically deformed and in particular bent. Particularly preferred is the shape of the light distribution body 3 or other light distribution bodies 3 , as described below or previously described, not self-holding, so that they deform automatically by their own weight.

For example, the material of the light distribution body 3 as a silicone and / or a thermoplastic elastomer, in particular with silicone. For example, the silicones TSE 3032 or TSE 3033 from Momentive Performance Materials Inc. are used. These are formed as a prototype transparent liquid and realized after curing as a transparent elastic rubber. The material of the light distribution body 3 is also compliant with the FST test for aviation.

The 2 shows a second embodiment of the invention, wherein the light distribution body 3 is formed as a serpentine section with a rectangular or square cross-section. The LED lighting device 2 is at an end face of the light distribution body 3 arranged so that the illumination light along the longitudinal extent of the light distribution body 3 is directed. The light distribution body 3 is formed slippery. The light distribution body 3 can in the same way as in the 1 outcoupling 8th or areas 9 wear, so that the illumination light is coupled flat. The length of the snake section is z. B. greater than 30 cm.

In Figure 3 is a schematic cross-section to an alternative to the lighting device 1 in the 2 illustrated as a further embodiment, wherein the LED lighting device 2 is formed as an LED strip, which extends along the longitudinal extension of the light distribution body 3 extends. The LED strip is preferably flexible and / or flexible. The length of the snake section is z. B. greater than 30 cm. The snake section can z. B. be deformed elastically in the form of a screw or a spiral.

In the 4 is an alternative to the embodiment in the 3 shown, the LED lighting device 2 on the likewise designed as a snake portion with a circular or oval cross section light distribution body 3 is attached laterally.

It should be noted that the LED lighting device 2 optionally on a side surface of the light distribution body 3 or can be integrated in these. For example, the LED lighting device 2 in the embodiment in Figure 3 completely in the base material of the light distribution body 3 integrated.

In the 5 is a development of the embodiment in the 1 shown, the LED lighting device 2 arranged so that these have a bottom 6 the light is coupled into the light distribution body. To the illumination light in the direction of the longitudinal extension of the light distribution body 3 to orient, is a reflection foil 10 as a possible embodiment of a reflection element, which in the base material of the light distribution body 3 is embedded and which deflects the illumination light by about 90 degrees and in the light distribution body 3 leads.

The material for the light distribution body 3 is a plastic which is translucent and / or transparent. The plastic is in particular castable or sprayable, so that the light distribution body 3 can be sprayed or poured. The LED lighting device 2 is at least injected or poured or even encapsulated or poured. Due to the cohesive connection between the LEDs 4 and the base material of the light distribution body 3 the coupling losses are very low. The material used is a silicone which is commercially available under the trade name TSE 3032 or TSE 3033 from Momentive Performance Materials Inc. In particular, the material is a thermoplastic elastomer.

LIST OF REFERENCE NUMBERS

1

lighting device

2

LED lighting device

3

Light distribution body

4

LEDs

5

top

6

bottom

7

faces

8th

outcoupling

9

outcoupling

10

reflective tape

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102004007555 A1 [0003]

Claims (16)

Lighting device ( 1 ) for a mobile with an LED lighting device ( 2 ) for outputting an illumination light and having a light distribution body ( 3 ), wherein the LED illumination device ( 2 ) in or on the light distribution body ( 3 ) is arranged so that the illumination light in the light distribution body ( 3 ) is decoupled and decoupled distributed over the surface, wherein the light distribution body ( 3 ) is made of a transparent, flexible silicone material. Lighting device ( 1 ) according to claim 1, characterized in that the light distribution body ( 3 ) has a modulus of elasticity with E <10 MPa, preferably E <5 MPa. Lighting device ( 1 ) according to claim 1 or 2, characterized in that the light distribution body ( 3 ) is translucent and / or transparent. Lighting device ( 1 ) according to one of the preceding claims, characterized in that the lighting device ( 3 ) is designed as a wall lighting. Lighting device ( 1 ) according to one of the preceding claims, characterized in that the LED illumination device ( 2 ) is designed as an LED strip or as a flexible printed circuit board with LED assembly. Lighting device ( 1 ) according to one of the preceding claims, characterized in that the light distribution body ( 3 ) as a mat section with a top ( 5 ), a bottom ( 6 ) and at least one side surface ( 7 ), wherein the LED illumination device ( 2 ) for coupling to the side surface ( 7 ) is arranged. Lighting device ( 1 ) according to one of the preceding claims, characterized by a reflection element ( 10 ), wherein the reflection element ( 10 ) in the light distribution body ( 3 ) is arranged for reflection of the illumination light. Lighting device ( 1 ) according to claim 7, characterized in that the light distribution body ( 3 ) as a mat section with a top ( 5 ), a bottom ( 6 ) and at least one side surface ( 7 ) is formed, wherein the reflection element ( 10 ) on the side surface ( 7 ) and the LED lighting device ( 2 ) for coupling at the bottom ( 6 ) is arranged. Lighting device ( 1 ) according to one of claims 1 to 6, characterized in that the light distribution body ( 3 ) is formed as a snake portion, wherein the LED illumination device ( 2 ) is disposed on an end surface of the snake portion. Lighting device ( 1 ) according to one of claims 1 to 5, characterized in that the light distribution body ( 3 ) is formed as a snake portion, wherein the LED illumination device ( 2 ) is disposed on a side surface of the snake portion. Lighting device ( 1 ) according to one of the preceding claims, characterized in that the LED illumination device ( 2 ) in the transition region of the illumination light between the LED illumination device ( 2 ) and the light distribution body ( 3 ) with the light distribution body ( 3 ) is integrally connected Lighting device ( 1 ) according to one of the preceding claims, characterized in that the material of the light distribution body ( 3 ) is a thermoplastic elastomer. Lighting device ( 1 ) according to one of the preceding claims, characterized in that the material of the light distribution body ( 3 ) has a silicone content. Lighting device ( 1 ) according to one of the preceding claims 12 or 13, characterized in that the material is FST-conformed. Airplane with the lighting device ( 1 ) according to one of the preceding claims, characterized in that the lighting device ( 1 ) is inserted in a passenger compartment of the aircraft. Aircraft according to claim 15, characterized by two identical illumination devices ( 1 ), the light distribution bodies ( 3 ) of the lighting devices occupy different curvatures and / or bends.

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