EP2102548B1 - Component having at least one light source - Google Patents

Description

The present invention relates to a component with at least one light source.

In the prior art, there are a variety of components with integrated bulbs that can be subsequently used for example in a wall, a ceiling or a floor. Such a component is for example in GB2242455A described. In order to allow the inclusion of the component, which is for example a metal frame in the wall, the ceiling or the floor, a corresponding recess must be previously provided therein, which makes the installation of the bulb relatively expensive.

It is therefore an object of the present invention to provide a component with at least one light source, which ensures a simplified installation of the light source.

The previously derived and indicated object is achieved in a component according to claim 1.

As a timber material for the purposes of the present invention, all those materials understood that have the natural product wood to the base, but crushed and processed with the addition of other auxiliaries and bonding agents. These are therefore, inter alia, particle board, fiberboard, such as MDF or HDF Plattenh, and OSB boards and from the aforementioned finished products, such as lightweight panels, composite honeycomb panels, panels with plastic or melamine resin coating. Solid wood, such as boards and planks, or veneers does not fall under the term wood material.

The use of a wood material makes it possible that the component according to the invention does not have to be installed in an expensive way in an existing wall, an existing ceiling or an existing floor, since it already forms itself said wall, said ceiling or said floor at least partially from the beginning.

Thus, it is conceivable that the component according to the invention forms a side wall or a shelf of a cabinet and in this way a light source does not have to be retrofitted in a complicated manner. In other words, the component according to the invention and the luminous means arranged in the interior form a prefabricated assembly unit which can be used as a wall, ceiling or floor element, for example of furniture or in house construction.

Preferred embodiments of the component according to the invention are the subject of the subclaims and will be described in more detail below.

A particular embodiment is the combination of particularly lightweight or acoustically equipped plate products, such as lightweight panels or acoustic panels, with bulbs.

As a lamp, in principle all possible according to the prior art can be used. However, bulbs which have a low overall height and / or whose light can be focused well and / or which have a low heat development and / or which have a high luminous efficacy have proved to be advantageous exhibit. These properties meet, for example, LED bulbs to a great extent. Another advantage of the LED technology lies in the fact that they can be influenced by appropriate controls in their color temperature. This makes it possible in a simple manner to influence the required lighting conditions as needed.
The components according to the invention can be used as wall, ceiling or floor elements. The integration in furniture (shelves, integration in cabinet walls for interior lighting) or in structural components is conceivable. It is particularly advantageous that the preferably bearing component can also take over the function of lighting.
A particular advantage of the component is the possibility of using wood-based materials as a component plate. Wood materials are generally thermally only slightly resistant, which complicates the installation of halogen lamps in furniture. In particular, multilayer boards, preferably three-layer boards, are also used as wood-based materials.

According to the light sources are used in combination with lightweight panels. Lightweight panels consist of cover layers of conventional wood materials and a middle layer, which has a significantly lower density than the cover layers, such as cardboard honeycomb, foamed middle layers (eg polyurethane foam, styrene foam, biofoams, lightweight panels of lignocellulosic material). Another possibility, which is not part of the invention, would be a lightweight board consisting of an integral plate, which has a significantly reduced density in the middle, which for Plate outside increases. A lightweight board has a density which is in particular less than 450 kg / m ³ , preferably less than 350 kg / m ³ .

Regardless of whether the component is a lightweight board or not, it is advantageous if according to one embodiment, the density of the wood material of the component, in particular the cover layer increases towards the outside, thereby high stability of the openings through which the light comes out of the component to the outside, to ensure. This is particularly important in the case when the opening has no exclusively perpendicular to the component or cover layer plane extending inner surfaces, but the inner surfaces, for example, have a stepped and / or beveled course. In the case of a stepped and / or bevelled course, the wooden material has only a relatively small thickness in the region of the narrowest cross section of the opening, which is why it must be prevented at this point that there are cracks or breaks in the region of the edge of the opening. The density should thus be in the near-surface zones, for example, at least 750 kg / m ³ , in particular at least 780 kg / m ³ , preferably at least 800 kg / m ³ .

The openings described above can be both holes and slots. Thus, for example, fields with a plurality of symmetrically arranged openings are conceivable, in particular with a plurality of juxtaposed rows of openings. Also fields with several juxtaposed slots are conceivable. Combinations of slit-shaped and circular openings may also be provided. Optimal illumination results, for example, especially when using LEDs, with an arrangement of several points of light squared, that is For example, five rows each with five openings for a field with 25 LEDs. Of course, only individual rows of openings or LEDs are conceivable. Also, multiple fields of openings or LEDs, preferably in a symmetrical arrangement, be provided on the component.

As mentioned, the openings may have different cross sections and, in particular, be circular in the form of bores or slot-shaped. By suitable arrangement of the light-emitting element relative to the opening, it is also possible to achieve a symmetrical or asymmetrical light emission. In other words, the light-emitting element does not necessarily coaxial with the opening, but may also be arranged offset to it.

The focusability in combination with a small size unites the LED particularly advantageous. A bundling of the light beam is thus possible in such a way that it respectively exits through an opening with a diameter or cross section of less than one to a few millimeters (for example 0.05-10, in particular 1-8 mm, preferably 3-6 mm).

Due to the fact that the luminous means according to an embodiment of the component according to the invention is set back far in comparison to the opening cross-section with respect to the outer surface of the component, in particular the cover layer, this is hardly directly visible to a viewer. This can prevent that the actual light source disturbs the viewer by direct light. A very homogeneous and seemingly diffuse lighting impression is thus achievable. The opening diameter at the location of the narrowest cross section or on the outside of the component also influences the illumination impression. Is that for example arranged light-emitting element by design relatively close to the respective opening, so the opening cross-section is to be chosen as small as possible, so as not to disturb the viewer by direct light. Thus, the distance between the light-emitting element and the opening also plays a role in the generation of a specific lighting impression.

According to a further embodiment of the component according to the invention it can be provided that the distance between the light-emitting element of the luminous means, in particular the LED, and the cover layer, which is provided with the light exit openings, more than 10%, in particular more than 20%, preferably more than 50%, the thickness of the component is. As stated previously, the cross-section of the openings can be made very small. For example, as a light-emitting element, an LED with a reflector and a lens be designed so that the light rays from the light-emitting element emerge so that they come together again at a focal point before they then very diversified enter the room. If the light-emitting element is arranged so that the focal point lies exactly in the region of the light exit opening in the component, it is sufficient to provide only a very small opening cross-section. In this way, a simple dazzling freedom can be achieved with simple means.

There are various ways to bundle or direct the light beam. First, this may have a symmetrical shape, whereby a uniform illumination of a surface is perpendicular to the light beam. However, an asymmetrical bundling is also possible, which allows a deflection of the exiting light.

As a result, when used as a ceiling light, for example, increased light intensities in the surfaces to be illuminated can be produced or the light emerging can be deflected towards the center of the room in the case of a ceiling light inserted at the edge or vice versa.

An LED illuminant requires electrical equipment to control the intensity and power of the LED. This can be installed centrally, for example, and supplies various components, which in turn have several LED bulbs. However, the integration of the electrical equipment has proven to be advantageous for the application and assembly. As a result, several components such as conventional "lights" can be wired and interconnected.

For the construction of ceiling systems, individual ceiling elements are preferably used, which can be introduced into prepared brackets. Bulbs are either retrofitted or installed in individual ceiling elements. However, such lighting used for the viewer are mostly disturbing because he has a direct view to the bulbs to a high degree. Even with the use of reflectors, this disturbing property can only be solved insufficiently. Reflections and unequal illumination are the consequences. When using the components according to the invention with light sources in some of the ceiling elements, this disturbing effect can be prevented.

The acoustic equipment of rooms and furniture is very easily possible with wood-based panels. According to the prior art, the cover layers are perforated for this, which allows the penetration of sound into the plate interior. Sound-reflecting and sound-absorbing elements in the Plate interior leads to sound absorption and can not escape the incoming sound.

The perforation can have holes of one or more millimeters (for example 1-2 mm). But there are also conceivable products whose hole diameter is less than 1 millimeter. The expert also calls such panels acoustic panels or panels.

A particular embodiment of the present invention represents the combination of sonic and lighting properties of a panel such that perforations of the acoustic panel are also used for penetrating light beams. For this purpose, certain bores of the acoustic panel are provided with light-emitting elements in a dependent of the required illumination intensity grid or light-emitting elements are arranged behind the openings. By choosing the appropriate light emitting element (e.g., LED), the required aperture radius can be made nearly identical to the diameter of the perforation. Thus, optical disadvantages can be avoided by disturbing uneven drilling diameter.

Finally, it will be discussed further preferred embodiments with regard to the formation of the wood material.

As already indicated, the wood-based material is preferably designed such that it has a very high homogeneity and density in the area of the near-surface zones. This allows the formation of precise recesses. In order to achieve the required homogeneity, when using chipboard as a wood material in the near-surface zones at least 50%, in particular at least 75%, preferably at least 95% of the particles have a maximum diameter of 0.5 mm.

A further improved precision in the formation of the openings can be achieved according to a further embodiment, when the wood material is provided with a resin-containing coating. This has a much higher density than a wood material and can be machined very precisely with tools of high quality. Preferably come as a coating impregnates, which are pressed directly to the wood-based panel, or laminates, which are glued in a separate step with the wood material, as a coating in question. The coating may have a thickness of at least 0.05 mm, in particular at least 0.15 mm, preferably at least 0.25 mm. In particular, the known urea, melamine and phenolic resins and mixtures thereof are used.

In order to avoid disturbing reflections in the area of the passage of light, a blackening can be carried out here. To avoid a separate operation, it may be advantageous to use a mass-colored wood material. For this purpose, numerous possibilities are known in the art. For example, to the chips or fibers in addition to the binder and a dye, here to achieve a blackening and graphite, are added.

To permanently avoid problems that may arise for the component due to the heating occurring in each light source, it is preferred that the wood material has an increased heat resistance - even if this problem in the preferred LEDs occur to a negligible extent. Measures to achieve such are well known in the art. For lightweight panels, for example, such can be achieved by employing temperature resistant center sheet materials, such as specialty cardboard honeycombs, and by selecting a temperature resistant adhesive for bonding between center and top sheets. There are therefore preferably used such wood materials or lightweight panels, which have a temperature resistance of at least 75 ° C, in particular at least 100 ° C, preferably at least 115 ° C.

Example 1: Integration of an LED in a lightweight honeycomb panel.

In a lightweight board with a total thickness of 19 mm consisting of double-sided cover layers (chipboard with 4 mm thickness) and a cardboard honeycomb core as light bulbs several light-emitting elements are integrated. The honeycomb panel is encased on all sides and is superficially designed and decorative on the edges. In addition, this has on the back of locking devices that allow installation as a ceiling light element integrated into a single elements existing coffered ceiling.

The element has a square shape and has 16 light-emitting elements in four rows of four elements integrated. The lighting elements are preassembled on a support plate on which all electrical devices for operating the light source are located.

The pre-assembled carrier plate has devices for attachment in the honeycomb plate.

The honeycomb panel is prepared with holes that serve the exit of the light beam, and with grooves for receiving the carrier plate. Now, in a simple assembly step, the support plate can be inserted into the prepared honeycomb panel and used as a cassette ceiling sub-element, which also performs a lighting function.

Example 2: Integration of an LED in an acoustic panel

An acoustic panel has perforations on at least one outside in a grid. Light-emitting elements as described in Example 1 are now integrated into the acoustic panel so that the light exit opening of the 16 light-emitting elements arranged in a grid coincide with perforations of the acoustic panel. Thus, the illuminant is integrated in the plate so that it can almost not be perceived.

Fig. 1a) bis d)

eine Schnittansicht von Ausführungsbeispielen eines Bauteils gemäß der vorliegenden Erfindung und

Fig. 2

eine Draufsicht auf das Bauteil aus den Fig. 1a) bis d).

There are now a variety of ways to design and further develop the component according to the invention. For this purpose, on the one hand reference is made to the claims subordinate to claim 1, on the other hand to the description of an embodiment with reference to the accompanying drawings. In the drawing shows:

Fig. 1a) to d)

a sectional view of embodiments of a component according to the present invention and

Fig. 2

a plan view of the component of the Fig. 1a ) to d).

Fig. 1 and Fig. 2 show a component 1, here a lightweight board 2, with a first cover layer 1a, a second cover layer 1b and a honeycomb-shaped, lightweight middle layer 1c with integrated light source 4. The light source 4 is connected via a carrier 7 with the cover layer 1a. The light-emitting means 4 has a plurality of LEDs 5 which radiate through associated circular openings 6 in the cover layer 1b to the outside. For reinforcement, the lightweight panel bar 3.

The embodiments according to the FIGS. 1a ) to d) differ in the design of the openings 6, in particular in the course of the inner surfaces 6a of the openings 6. Thus, the inner surfaces 6a of the openings 6 in the embodiment according to Fig. 1a ) are straight and extend perpendicular to the plane of the lightweight panel 2 and the lower cover layer 1b.

But it is also conceivable, as in the case of Fig. 1b ) provide a stepped course of the inner surfaces 6a. In this case, the upper part of the inner surface 6a is set back relative to the lower part. Such an embodiment of an opening 6 can be achieved, for example, by first providing a blind hole of a relatively large diameter on the side of the lower cover layer 1b facing the LED 5, into which opening a continuous bore of a smaller diameter is then introduced. Particularly advantageously, however, the described opening 6 can also be produced with a correspondingly shaped stepped drill. A graduated course of the inner surfaces 6a has the advantage that, in particular in conjunction with a bundling of the emitted Light rays in a focal point relatively small opening cross-sections can be realized.

As small opening cross sections as possible can also be achieved by an oblique course of the inner surfaces 6a, as he, for example, in the embodiment of Fig. 1c ) is shown. With an oblique course is meant a course at an angle to the longitudinal plane of the lightweight board 2 and the lower cover layer 1b. Such a course can be generated for example by a conical milling tool.

Fig. 1d In this case, the upper part of the inner surface 6a is recessed from the lower part and is formed, for example, by first providing a blind bore of a relatively large diameter in the lower cover layer 1b is provided. The lower part of the inner surface 6a then projects in a plane parallel to the longitudinal plane of the lightweight panels 2 and cover layer 1b in the direction of the center of the opening 6, followed by a bevelled portion, in which the inner surface 6a so angular to the longitudinal plane of the lightweight panel 2 and Cover layer 1b runs. The chamfered portion can be produced in the present case, for example, by a conical milling tool. This opening 6 can alternatively be produced with a correspondingly shaped step drill.

Fig. 2 Finally, FIG. 1 shows a top view of the component 1 in the form of a lightweight board 2 with a field of four rows of LEDs 5 and openings 6 arranged next to one another and offset from one another. It is of course also conceivable to arrange a plurality of such fields in one and the same component 1.

Claims (15)

1. A component (1) with at least one light source (4), wherein the component (1) features a wood based material and the light source (4) is arranged in the interior of the component (1), characterized in that the component (1) is a lightweight board (2) with two cover layers (1a, 1b) of a wood based material and a central layer (1c), which has a lower density than the cover layers (1a, 1b), wherein one or more openings (6) are arranged in one of the cover layers (1b).
2. The component (1) according to claim 1, characterized in that the component (1) features at least one particleboard, fiberboard and/or OSB board.
3. The component (1) according to one of the preceding claims, characterized in that the inner surfaces (6a) of the openings (6) are blackened.
4. The component (1) according to one of the preceding claims, characterized in that the inner surfaces (6a) of the openings (6) have a stepped and/or sloped profile.
5. The component (1) according to one of the preceding claims, characterized in that the openings (6) are formed by bores and/or slots.
6. The component (1) according to one of the preceding claims, characterized in that the light source (4) features at least one light-emitting element, particularly at least one LED (5), wherein one of the openings (6) is preferably assigned to each light-emitting element, particularly each LED (5), and wherein the opening (6) is preferably arranged coaxial to the light-emitting element, particularly the LED (5).
7. The component (1) according to claim 6, characterized in that the diameter of the opening (6) amounts to 0,05-10 mm, particularly 1-8 mm, preferably 3-6 mm.
8. The component (1) according to claim 6 or 7, characterized in that the clearance between the light-emitting element, particularly the LED (5), and the cover layer (1b) amounts to more than 10%, particularly more than 20%, preferably more than 50%, of the thickness of the component (1), wherein the light-emitting element, particularly the LED (5), preferably contacts the cover layer (1b).
9. The component (1) according to one of the preceding claims, characterized in that the component (1) is an acoustic panel.
10. The component (1) according to one of the preceding claims, characterized in that the density of the wood based material of the component (1), particularly of the cover layer (1b), increases outward, namely to a value of at least 750 kg/m³, particularly at least 780 kg/m³, preferably at least 800 kg/m³.
11. The component (1) according to one of the preceding claims, characterized in that the wood based material of the component (1), particularly of the cover layer (1b), has a content of particles with the maximum diameter of 0,5 mm of at least 50%, particularly at least 75%, preferably at least 95%, referred to the total number of particles, in at least the outer 30%, particularly 20%, preferably 10%, of its cross section referred to the total thickness of the wood material.
12. The component (1) according to one of the preceding claims, characterized in that the wood based material of the component (1), particularly of the cover layer (1b), is provided with a coating containing synthetic resin, wherein said coating is particularly formed by an impregnant, which is preferably compressed directly with the wood based material, or by a laminate, which is preferably bonded to the wood based material in a separate production step.
13. The component (1) according to claim 12, characterized in that the coating has a thickness of at least 0,05 mm, particularly at least 0,15 mm, preferably at least 0,25 mm.
14. The component (1) according to one of the preceding claims, characterized in that the particles of the wood based material of the component (1), particularly of the cover layer (1b), are colored with a die, preferably graphite.
15. The component (1) according to one of the preceding claims, characterized in that the wood based material of the component (1), particularly of the cover layer (1b), and/or the lightweight board (2), particularly the central layer (1c), have a thermal stability of at least 75°C, particularly at least 100°C, preferably at least 115°C.

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