WO2012113005A1

WO2012113005A1 - Light box

Info

Publication number: WO2012113005A1
Application number: PCT/AT2012/000040
Authority: WO
Inventors: Asmir SALIHBASIC; Georg Siegl
Original assignee: Best Systems Gmbh
Priority date: 2011-02-25
Filing date: 2012-02-22
Publication date: 2012-08-30
Also published as: AT12555U1

Abstract

The invention relates to a light box (1) that comprises a frame (R), a rear wall (5) and illumination elements (16), preferably LEDs (LED - light emitting diode), to illuminate the light box, said illumination elements (16) being located and distributed on module elements (7) which, in turn, are secured or can be secured to the rear wall (5). Lines for supplying power to the illumination elements (16) are arranged on at least one frame section (4) of the frame (3) which is composed of sections. Power supply components (19) with transformers are arranged on at least one frame section (4) in the shape of an angular section, and plug-connector elements (17, 21, 22) are provided to electrically connect the module elements (7, 8, 9) to each other and to the power supply components (19), and to connect multiple power supply components (19) to each other.

Description

Light boxes

The invention generally relates to a light box with a frame, a rear wall and lighting elements, preferably LED's (LED - light emitting diode), for illuminating the light box. Such light boxes or light boxes may be called e.g. in the context of advertising, for example as a means of presenting backlit advertising space, in particular at exhibitions, fairs, etc., are used.

More in particular, the invention relates to a light box (1) with a frame (R), with a rear wall (5) and with light elements (16), preferably LED's (LED - light emitting diode), for illuminating the light box. Such a

Leuchtkasten is known from US 7 192 154 B2.

The market is currently offering a lightbox with a frame that encases an acrylic panel, with high-power LEDs on the edges for illumination. The fact that this illumination only takes place from the edges ago, only small dimensions of the light box are possible because the light is weaker with the distance from the light source. In addition, the illumination is generally rather low and at least not as even as it would be desirable. Moreover, it is disadvantageous that relatively powerful LED's must be used, which can also lead to an area-wise overheating. Finally, it is also disadvantageous that the components required for the power supply of the LEDs, such as, in particular, transformers, are not installed in lightbox, but must be present as a separate device.

The light box known from US Pat. No. 7,192,154 B2 is intended for office furniture and has a hollow frame in which electrical connection lines are accommodated, whereas a

Power supply component with converter and rectifier also directly in the connection cable, ie outside the frame, is arranged.

It is now an object of the invention to provide a lightbox as cited above, which overcomes the above drawbacks; in particular, should be able to avoid heat-spots and is to be achieved a uniform illumination of the jewei ^¬ time image. The light box should also be suitable for large dimensions, but if desired, even with a small depth, eg only 65 mm, can be produced. Finally, a simple, inexpensive production and assembly is sought, the light box with the light elements assembled quickly or else, for maintenance purposes, should be disassembled.

To solve this problem, the invention provides a lightbox as defined in claim 1. Advantageous embodiments and further developments are specified in the dependent claims.

The invention thus provides that kT AI new

The invention also advantageously provides an arrangement with a plurality of such light boxes, these light boxes are placed side by side and connected to each other when they are in an upright position. In this way, a wall of light boxes can de facto be constructed.

The present lightbox is easy to manufacture, and it can be used like a light-emitting frame or as light-emitting signs. In the production of a specific light box only the frame profiles in the respective length are cut off, and it must the size of the rear wall, also called support plate, are determined, after which the preferably plate-shaped module elements with the light elements, namely in particular LED's, in ent ^¬ speaking Number are provided. For a particularly simple attachment of the module elements on the rear wall or support plate Velcro points can be provided, ie it provided at the required positions sections of Velcro straps both on the rear wall and on the back of the module elements, for example, glued so To fix the module elements by simply pressing against the back wall.

To achieve high flexibility, the module elements preferably present in several sizes. Currently, for example, it is intended to use module elements in formats of 25 x 25 cm, 25 x 10 cm and 10 x 10 cm. This module elements ^¬ the preferred as mentioned by simply pressing mounted in Velcro pads, the mounting can be done quickly and without the use of tools that can be easily removed from the back again as well as the modular elements without the use of tools.

In order to simplify the production of the light box, connector elements are provided for electrically connecting the module elements to one another and / or to the power supply components and / or a plurality of power supply components. After the mechanical fastening of the module elements to the rear wall and after the attachment of the power supply components in the respective frame profile, the electrical connections can be easily made via the connectors, wherein the power supply can be made from module element to module element via such connectors. The module elements have for this purpose appropriate sockets in which the connectors of the connector are inserted.

To achieve great versatility, the angle profiles are each provided with at least one groove. The grooves can serve a variety of attachment purposes, and in particular it is advantageous if a front surface of the light box, such as a translucent front wall, is fastened by means of such grooves on the frame profiles. As a front surface, however, it is possible in particular simply to provide a trans-illumination, a sujet or an image-bearing web, for example of a printed fabric or a plastic film. In such a web as a front surface of the light box, it is particularly advantageous if this sujet web has at its edges a rubber profile, with which it is held in the grooves of the frame profiles by a ^¬ stuck.

The frame profiles can simply be extrusion profiles made of aluminum or an aluminum alloy. The rear wall may be made of any material, such as plastic, but also wood or metal.

Finally, it is also advantageous if the LEDs provided as luminous elements have low-power LEDs, e.g. with a power in the order of 0.1 watts, which are preferably distributed in a uniform grid over the module elements.

For an upright installation of the light boxes, it is advantageous if the light boxes are provided with feet on their lower side in the upright frame side.

The invention will be further elucidated on the basis of preferred embodiments, to which, however, it should not be restricted, and with reference to the drawing. In detail in the drawing:

Fig. 1 is a perspective overall view of a first embodiment of a light box according to the invention;

Figure 2 is a schematic view of assembled within a frame on a rear wall of a light box LED Modulelemen ^¬ th.

Fig. 3 is a partial sectional view taken along the dotted line III-III in Figure 2;

4 shows an enlarged detail view of FIG. 3, according to arrow IV; Figs. 5, 6 and 7 show various examples of electrical

Connectors, as used in the present light box for connection or electrical connection of power supply components for the LED's, namely in particular transformers;

8 shows a perspective view of two transformer elements with connector parts according to FIGS. 6 and 7; and Figs. 9 and 10 show two examples of arrangements with several juxtaposed luminous boxes according to the invention.

In Fig. 1, a generally rectangular light box 1 is shown diagrammatically, which is provided with, for example, foldable Fü ^¬ Shen 2 or T-feet to the light box on a flat surface, eg the floor, in an upright positi ^¬ on as in Fig. 1 can be shown. Instead of the ge ^¬ showed fold-out legs 2 also solid in the form of feet may be provided as shown, and it can also be used other foot shapes, such as plates feet. It is certainly possible with such feet 2, the light box 1 as ^¬ be illuminated element, for example, with dimensions (height x width) to set up 180 x 80 cm detached. However, other dimensions are of course conceivable, as will be mentioned below with reference to FIGS. 9 and 10.

The lightbox 1 has a frame 3 of similar frame ^¬ profiles 4, wherein the profile shape is best from Fig. 3 ersicht ^¬ Lich.

This frame profiles 4 in the form of angle sections, namely sion profiles extruders, for example of aluminum or an Alumini ^¬ order alloy are cut off in the desired lengths, and for example, mitred and joined in the corners at right angles to each other, as known per se is. In this merger of the frame 3 of the frame sections 4 is preferably at the same time a rear wall 5, which can be seen from Fig. 3 and 4, taken in grooves 6 of the frame sections 4 allsei ^¬ tig and fixed so. This rear wall 5, also called support plate, for example, plastic, metal or even made of wood, and it carries plate-shaped LED module elements 7, for example, have dimensions 25 x 25 cm. However, other sizes of these plate-shaped module elements 7 are also possible, cf. in Fig. 2, the module elements 8, 9, such as formats of the LED module elements or panels 7 with Dimen ^¬ sions 25 x 10 cm or 10 x 10 cm.

The panels or module elements 7 are provided at their rear with Ab- cut from Velcro straps provided, and in the corresponding places are comparable sections of Velcro straps on the rear wall 5, so that the module elements 7 can be mounted to the rear wall 5 via respective Velcro points or points 10 simply by pressing, see. 3 and 4.

3 are in other grooves 11, 12 of the frame profiles 4 tissue or plastic webs 13, 14 with peripheral, circumferential rubber profiles 15 inserted and so curiously held on the frame 3.

Of course, it is also possible to omit the backsheet 14 should this be desired. However, the web 13 at the front of the light box preferably carries an image or subject, for which reason the web 13 is also called a sujet web, and this web 13 is formed by means of a plurality of LEDs 16, which at the module elements 7 in a more or less are arranged in regular distribution, backlit and thereby transilluminated, so as to make visible on the web 13 located subject, image or subject accordingly. The subject on the web 13 can have the most diverse image contents, in particular in connection with advertising for products, travel destinations, etc.

The module elements 7 have in a conventional manner, for example, copper interconnects for electrical connection of the LED's 16. For interconnection of the individual module elements 7, plug-type connections, e.g. 17 in Fig. 2, which consist of short cable pieces with one-sided connectors, which are inserted into corresponding sockets 18 (see also Fig. 3).

About comparable connectors, the module elements 7, more precisely individual module elements 7, also connected to frame-side power supply components 19 with transformers;

These power supply components 19, see Figs. 2 and 3, but also Figs. 4 and 8, are in the necessary number to supply all the LEDs 16 with electrical energy, directly in the frame ^¬ profiles 4 housed without them the backlighting of Train 13 hinder or cast shadows, and without a separate electrical converter device outside the light box 1 would be necessary. The power supply components 19 are connected in parallel in the necessary number, and the respective LEDs 16 connected to a transformer 19 are connected in series. According to Fig. 3, the power supply component 19 on a - eg obliquely - profile surface (not labeled) on ^¬ lie.

To the transformers or power supply components 19 are appropriate in a conventional manner rectifier and optionally DC / DC converter (voltage converter) connected to ensure a stable power supply for the LED's 16. These rectifiers or voltage transformers are per se conventional components, and they are therefore not shown in detail in the drawing and require no further explanation.

Tests have shown that LED's 16 can be provided with a low power, for example, a module element 7 with a dimension of 25 x 25 cm carries 51 LED's and is given during operation total consumption of 5 watts. For transformers with a power of about 30 watts, therefore, up to 6 module elements 7 can be connected to such a transformer.

In the above-mentioned embodiments with smaller LED module elements 7, with dimensions of 25 × 10 cm or 10 × 10 cm, for example, 21 LEDs or 9 LEDs per panel 7 can be provided.

Overall, this results in that the individual LEDs 16 have a power consumption of about 0.1 watts.

As is apparent from FIGS. 3 and 4, the power supply components 19 are inclined in the angle frame profiles 4, where they can be fixed there in a simple manner, for example by means of two screws. FIGS. 3 and 4 furthermore show an end-side bushing 20 of this power supply ^component 19, wherein a plug 21 of a plug-in connector 20 is provided in this bushing 20. Connector element 22, about as shown in FIG. 5, 6 or 7, can be inserted, see also Fig. 8. From Fig. 7 and 8 is further a connection cable 23 with plugs 21 and a power plug 24 can be seen. Such a connecting cable 23, like the connecting cable of the plug connectors 22 according to FIGS. 5 and 6, can be accommodated within the angular frame profiles 4, without the LEDs 16 on the module elements 7 being impaired in their light radiation. In the case of the connection cable 23, the part with the power plug 24 is led out of the frame 3 of the light box 1 at a suitable location, cf. Fig. 2.

By the internal power supply components 19 in the frame sections 4 prevents shadows in the backlit image (track 13), and the frame 3 and the light box 1 is well and evenly illuminated by the LED module elements 7 to the corners.

As mentioned, several smaller transformers are used as a rule, as shown in the drawing, about Fig. 8, have a narrow, elongated shape and can be easily accommodated in the frame sections 4. The use of several smaller transformers has the advantage that these transformers can be accommodated without problems in frame 3 - in an electrical parallel circuit - so that no transformer outside the light box 1 is provided.

With the present light box 1 can flexible sizes, for example, in frame systems or spatial concepts, such as in a 10 cm - grid can be constructed with as mentioned good and uniform illumination from ^¬; 9 and 10 show examples of such "light walls" or wall systems of individual, for example, different widths light boxes 1, wherein corresponding width dimensions in the arrangements or light wall systems 25 and 26 shown in FIG. 9 and 10 contained within the individual light boxes 1 For example, the height of the light boxes 1 may well be 250 cm, as is customary for display stands In such wall systems 25 or 26, as shown in FIGS. 9 and 10, the individual light boxes 1 can be attached to their rear side, for example with the aid of clips or through At- screws of fasteners are interconnected.

The described light boxes are thus particularly suitable for the construction of permanently illuminated advertising space, etc., whereby the fact that low-power LEDs are used, in comparison to conventional light boxes, a significant energy savings is possible.

In the case of maintenance or repair, such as failure of LED's 16, the image, i. the web 13 are removed at the front, after which the module elements 7 with the non-functioning LED's 16, without a tool would have to be used, can be removed from the rear wall 5. Nonetheless, the described Velcro points 10 are sufficiently strong to hold the module elements 7 securely to the back wall 5 normally. Thus, in the present light box 1, neither the frame 3 has to be disassembled, nor must other disassemblies, such as the rear wall 5, be carried out; rather, an exchange of LEDs can be made possible in a very simple manner. This is further facilitated by the described electrical connector 17, which can be simply unplugged and plugged in again after replacement of the respective module element 7.

Of advantage in the present light box 1 and the low heat generation due to the modular distribution of the LEDs 16. As a result, a much longer life of the LEDs 16 is achieved.

Although the invention has been described above with reference to particularly preferred embodiments, yet further modifications and modifications are possible without departing from the scope of the invention. Thus, it is conceivable, for example, to attach to the front of a deposited with a web 13 glass plate, such as an acrylic glass plate, then on the frame profile 4 a groove comparable to the groove 6 (see FIG. 3) would be attached. It is also possible to distribute the LEDs 16 more or less regularly in a somewhat different arrangement instead of in a very regular grid, as shown in FIG. i always a uniform backlighting of the web 13 possible t.

Claims

Claims :

1. Lightbox (1) with a frame (R), with a rear wall (5) and with light elements (16), preferably LED's (LED - light emitting diode), for illuminating the light box, wherein the lighting elements (16) distributed to module elements (7) are arranged, which in turn are fastened or attachable to the rear wall (5), and wherein power supply lines for the lighting elements (16) are arranged on at least one frame profile (4) of the composite frame (3), characterized in that power supply components (19) with transformers are arranged on at least one frame profile (4), which is in the form of an angle profile, and that for electrical connection of the module elements (7, 8, 9) with each other and with the power supply components (19) and several power supply components ( 19) with each other connector elements (17, 21, 22) are provided.

2. light box (1) according to claim 1, characterized in that the power supply components (19) are mounted with transformers on a surface of the angle profile.

3. light box (1) according to claim 1 or 2, characterized in that for fastening the module elements (7) on the rear wall (5) Velcro points (10) are provided.

4. light box (1) according to one of claims 1 to 3, characterized in that the module elements (7) are plate-shaped.

5. light box (1) according to claim 4, characterized in that the module elements (7, 8, 9) are present in several sizes.

6. light box (1) according to one of claims 1 to 5, characterized in that the angle profiles each have at least one groove (6, 11).

7. Lightbox (1) according to any one of claims 1 to 6, characterized in that the front surface of the light box (1) provided for an illuminated subject web (13) is provided.

8. light box (1) according to claim 6 and claim 7, characterized in that the subject web (13) has at its edges a rubber profile (15) with which they in the grooves (11) of the

Frame profiles (4) is held by plugging.

9. light box (1) according to one of claims 1 to 8, characterized in that the frame profiles (4) are extrusion profiles of aluminum or an aluminum alloy.

10. Light box (1) according to one of claims 1 to 9, characterized in that the light-emitting elements (16) provided LED's low-power LED's, e.g. with a power in the order of 0.1 watts, which are preferably distributed in a uniform grid over the module elements (7).

11. light box (1) according to one of claims 1 to 10, characterized in that it for an upright position with

Stand (2) is provided at the lower in the upright position frame profile (4).

12. Arrangement (25, 26) with a plurality of laterally interconnected, upright light boxes (1) according to one of claims 1 to 11.