WO2014086333A1

WO2014086333A1 - Wall covering

Info

Publication number: WO2014086333A1
Application number: PCT/DE2013/000767
Authority: WO
Inventors: Florian Ilchmann
Original assignee: Ambright GmbH
Priority date: 2012-12-06
Filing date: 2013-12-05
Publication date: 2014-06-12
Also published as: DE102012024163B4; DE102012024163A1

Abstract

The present invention relates to a wall covering, in particular a wallpaper, having at least one layer of a carrier material (10), at least two printed circuit boards (16) which are connected to the carrier material and on which luminous means (14) are contactable, and at least two luminous means (14) which are fastened to the printed circuit boards (16). The wall covering is distinguished in that at least two luminous means (14) are arranged on separate printed circuit boards (16).

Description

wall covering

The present invention relates to a wall cladding, in particular a wallpaper comprising at least one layer of a carrier material, at least two boards connected to the carrier material, on which lighting means are contacted, and at least two lighting means which are mounted on the boards.

Wall coverings of this type are already known, in particular in the form of illuminated wallpapers, with known luminous wallpapers comprising, for example, large flexible printed circuit boards on which light-emitting diodes (LEDs) are applied. The LEDs represent luminous dots (picture points) which, for example, represent a pattern when viewing the illuminated wallpaper. The electrical contacting of the LEDs of the illuminated wallpaper is carried out by means of the flexible circuit board. On the flexible circuit board, a further layer of material may be applied, through which the light emitting diodes radiate, whereby the flexible circuit board is not directly visible. Due to the flexible circuit board, a known luminous wallpaper is rolled up and can be transported in rolled form. At their destination, the rolled-up circuit board is unrolled and glued to a wall, for example. Alternatively, it is known, strip-shaped, equipped with light-emitting diodes

To embed boards between two layers of material of a substrate and also to use as wall cladding. Disadvantageously, the light-emitting diodes are not freely arrangeable in known wall panels or any arrangement would be associated with high costs and costs. Thus, when using strip-shaped LED boards, it is fundamentally not possible to create any complex patterns. For this reason, well-known illuminated wallpapers are so far only available in very few variants. For example, luminous wallpapers are known, which represent simple geometric luminous patterns, such as lines or square structures, with luminous points. In particular, in the case of luminous wallpaper, however, it is desirable to be able to make individual patterns in order to be able to represent, for example, signatures, symbols, diagrams and objects. For this purpose, it is necessary that the lamps are individually arranged and, for example, individually and independently controlled.

Disadvantageously, an individual placement of the lighting means is difficult in the case of known luminous wall cladding; in particular, only a strip-shaped or rectilinear alignment of the lighting means is possible by the use of strip-shaped LED boards. When using large flexible boards, the production of individual designs is possible in principle. However, this is associated with a respective complete redesign of the flexible board, which in particular requires a completely new routing of the board. Even the expensive, large-scale boards with individual arrangement of the LEDs can be made only in very small numbers (or even as a unique), resulting in significant price disadvantages due to high production costs for large-scale boards. It is an object of the invention to provide a wall cladding, which allows a cost-effective, individual arrangement of the bulbs on the wall cladding. This object is achieved by a wall cladding with the features of claim 1 and in particular by the fact that at least two lamps are arranged on separate boards.

This means that at least two boards are provided, on each of which a single light source is arranged. Thus, the boards for the individual lamps can be made identical and thus be used for a variety of wall panels. The blanks can thereby be produced in very large numbers and each equipped with a light source to be subsequently arranged in the inventive wall cladding. Due to the high number of items to be achieved for the board with a single bulb, the production costs for a single board sink very strong, whereby the wall cladding according to the invention is inexpensive to produce. According to the invention, at least two light sources are arranged on separate boards. Thus, exactly one illuminant is located on each of the boards, and the boards, for example, each represent a luminous pixel of the wall cladding. Due to the separate design of the boards, the boards can be arranged at any desired positions on the wall cladding. It can therefore be created any light patterns without the board must be made with the light source in a modified form. Only in the manufacturing process of the wall cladding, the positioning of the board must be changed. If more than two separate boards with one illuminant per board are used, more complex structures such as lettering or symbols can be represented on the wall cladding by luminous pixels. The lettering and symbols can be individually adapted by only the position of the boards is changed with the bulbs in the manufacture of the wall paneling.

Also possible is a combination of separate, own boards, each with a light source and the arrangement of another type of boards or carriers with multiple bulbs. For example, strip-shaped circuit boards with applied LEDs that are available as mass-produced items can also be integrated into the wall cladding in order, for example, to represent lines by means of luminous dots in a conventional manner.

A luminous means which is arranged on a separate circuit board can be formed, for example, by an LED, an arrangement of a plurality of LEDs, organic light-emitting diodes (OLEDs) or by electroluminescent foils. Advantageously, multicolor LEDs (e.g., RGB LEDs) may also be used as a single illuminant on the boards to emit different colors with individual pixels of the luminous wall cladding.

As wallcovering, for example, a wallpaper, a tarpaulin, prints, paper and fabrics to understand. Alternatively, non-flexible materials such as glass, MDF and Rigips plates may also be used. The wall cladding according to the invention can be used to cover walls, floors and ceilings. The wall cladding can also be used free-hanging or freestanding. For example, as a room divider or as a fair wall, which is clamped for example on a lightweight profile.

Advantageous embodiments are given in the description, the subclaims and the drawings.

According to a first preferred embodiment, substantially each light source is arranged on a separate board. The wall cladding can thus be substantially (for example, more than 80% of all bulbs) constructed with bulbs that are arranged on their own, separate boards. This is particularly advantageous if the wall cladding is to include a large number of luminous pixels, that is, for example, has several hundred or even several thousand pixels. These pixels can then be formed by identical boards with bulbs applied to the boards.

Advantageously, in a wall cladding exactly one type of board can be used, which can then be manufactured in particularly high numbers and thus is particularly cost-effective.

If you want to use bulbs that emit different colors in a wall cladding, it is possible to mass-produce the boards for the bulbs and then equipped with bulbs for different colors or with RGB bulbs (such as RGB LEDs). In this way, a cost-effective production of wall cladding is also ensured.

According to a further embodiment, all lamps of the wall cladding are each arranged on a separate board. At the Position of the wall cladding thus need not be considered other types of boards or bulbs.

According to a further embodiment, the boards are formed from a flexible material and in particular have a thickness of less than 250 μm, preferably of 150 μm and / or a diameter of less than 20 mm, preferably of less than 10 mm. By using a flexible material for the board, the entire wall panel may also be flexible (e.g., rollable), which may be particularly advantageous in transporting the wall panel in roll form or when applying the wall panel to a wall by rolling.

Furthermore, the wall cladding is thickened only slightly where there are boards by the small thickness of the boards of less than 100 μιη. In particular, in the design of the wall paneling as a luminous wallpaper as thin a design of the boards is necessary to prevent crushing of the boards by the usually very thin wallpaper material. Furthermore, an embodiment of the board with the smallest possible base area can be advantageous. For example, is required by boards with a diameter of less than 15 mm for each required luminous point and thus for each bulb only a small board area, whereby the cost of the boards can be reduced. In addition, the bulbs and thus the pixels can be arranged closer to each other by small boards, whereby finer luminous structures, for example in lettering, can be displayed with the wall paneling. Preferably, a respective lighting means is arranged on a first side of the circuit board and the circuit board comprises on a second side at least two contact surfaces, which are electrically connected to the lighting means. The luminous means can emit light on a front side of the circuit board and can be supplied with electrical energy via the contact surfaces arranged on a rear side of the circuit board. If, for example, RGB LEDs are used as the luminous means, two additional contact surfaces, that is to say a total of at least four contact surfaces, can be provided on the second side of the circuit board.

Alternatively, it is also possible to provide in each case one contact surface on the first side and one contact surface on the second side of the circuit board. According to a preferred embodiment, the contact surfaces are electrically contacted with lines, in particular with bonding wires. A contact with lines has the advantage that an individual connection of the lighting of the wall paneling is possible. In addition, lines are significantly less expensive than, for example, the use of connection boards. In the production of custom wall claddings, the use of ducts allows for individual design of the wall cladding by first placing the sinkers in those positions of the wall cladding where a luminous pixel is provided. These positions may vary from wallcovering to wallcovering. Through the use of cables, a simple and fast contacting of the contact surfaces of the boards is possible regardless of the position of the boards. In particular, through the use of bonding wires, which, for example, have a diameter of less than 125 μm, the lines are also in the use of a thin carrier mat. terials, such as a wallpaper track, not visible from the outside.

According to a further embodiment, each board with a fixed illuminant has a maximum height of less than 3 mm, in particular less than 1 mm. In this way, the bulbs are not apparent even from a thin carrier material.

Advantageously, the carrier material recesses, which are adapted to the size of the light source, the bulbs are visible through the recesses. The bulbs thus emit light through the recesses without any absorption of light by the support material. The recesses are merely adapted to the lamp, the board on which the lamp is mounted, but can be substantially covered by the substrate. The use of recesses in the carrier material is necessary in particular in the case of completely opaque carrier materials.

According to a further embodiment, an at least partially applied layer of a holding material is provided, wherein the boards are arranged between the carrier material and the holding material. The holding material can be formed, for example, by hot-melt adhesive dots applied to the sinkers or by a flat fleece. By the holding material, the boards and the lines between two layers of material (ie the support material and the holding material) are included and thus protected from damage.

Alternatively and / or in addition to the retaining material, the boards and / or the lighting means may have a protective coating, whereby Boards and lamps, for example, from the influence of moisture or in the design of the wall paneling can be protected as a wallpaper in front of wallpaper paste. Furthermore, the present invention comprises a method for producing a wall cladding, in particular a wallpaper, which at least one layer of a carrier material, at least two connected to the carrier board, on which illuminant can be contacted and at least two lighting means which are mounted on the boards, wherein at least two bulbs are arranged on their own boards. The method according to the invention is characterized in that the circuit boards are arranged on the carrier material and the circuit boards are electrically contacted. The boards are thus arranged individually, depending on a desired light pattern on the substrate. The carrier material may be, for example, a wallpaper web.

According to a preferred embodiment, cables, in particular bonding wires, are laid which contact the circuit boards electrically. Thus, for example, each board can be connected with separate lines, whereby each lamp is individually switchable. Alternatively, the lines can be laid in such a way that the bulbs can be switched on and off in groups. Another possibility for the individual control of the lighting means is a digital data bus, via which the brightness and / or the light color of the light source of the board can be determined for each board. The light source or the circuit board may additionally comprise a logic circuit and / or a microprocessor for this purpose. Advantageously, the carrier material is perforated before arranging the boards where the bulbs are arranged. A resulting recess of the carrier material can be created for example by punching or drilling.

According to a preferred embodiment, the boards are coated with adhesive before being arranged on the carrier material, in particular on the side which comes to rest on the carrier material. The boards thus go an adhesive bond with the carrier material, which they can not move in the further process process and easier contact with the wires or bonding wires is possible. In addition, the bond ensures a permanent and secure connection of the carrier material with the boards. Advantageously, the method is carried out on an X-Y table, wherein the X-Y table in particular has a width of greater than 0.6 m. Such a width corresponds to a standard width of wallpaper webs, so that the wall cladding produced by the method according to the invention is "compatible" with conventional wallpaper webs and can be used, for example, in combination with conventional wallpapers.

A length of the XY table is to be chosen as large as possible in order to cover the largest possible area per wall cladding produced. The XY table can be for example 5 or 10 m long. In this way, the manufacturing cost of the wall covering per unit area can be reduced. Another advantage of using an XY table is that even stiff, non-flexible materials can be processed into a luminous wall cladding on the XY table. Alternatively, only one X table may be used, in which case the carrier material may be rolled up on two sides of the X table and passed through the X table during the production process of the wall panel in the Y direction.

According to a further embodiment, a bonding head is moved by means of the X-Y table for contacting with bonding wires. The bonding head can be designed to attach bonding wires to the contact surfaces of the boards and thus electrically contact the boards. For this purpose, the XY table can in particular have a tool changer, which can, for example, exchange a punching device for perforating the carrier material and a line pulling device against the bonding head in order to carry out all the steps necessary for producing the wall lining on the same XY table.

According to a further embodiment, a compensating material is applied to the carrier material, which has recesses for the boards and / or for lines. Thus, a homogeneous thickness of the wall cladding may result, so that the boards and lines are not visible in plan view of the substrate. For example, a planar compensation material is used, which is double-sided self-adhesive, whereby it can be easily processed and applied and also attached to a possibly applied layer of a holding material to the substrate. Alternatively, a liquid leveling material (eg, silicone or a polymer) may be used which is poured over the substrate, circuit boards, and leads. By a surface tension of the liquid compensation material differences in height through the boards and the lines can be compensated by itself. In the dried state, the original liquid compensation material form a flexible but planar compensation layer.

The production of a custom-made luminous wall cladding can thus take place in several steps. First, a support material, such as a wallpaper sheet size 0.6 m x 5 m with resting on the X-Y table visible side can be placed on an X-Y table. Subsequently, the XY table can move a punch head back over the wallpaper web to reach the desired positions

Luminous dots make a perforation of the wallpaper web. The

Luminous dots trace the desired light pattern to be displayed.

In the next step, flexible printed circuit boards with a diameter of 10 mm and a thickness of 150 μπι, which have a LED on a first side, are provided on the circuit board around the LED with adhesive. The printed circuit boards are then placed on the wallpaper sheet by a pick and place arm which is moved through the XY table so that the LEDs come to rest in the preperforated recesses and the adhesive bonds between the flexible printed circuit boards the wallpaper track manufactures. Subsequently, the bonding head can be used to electrically connect the flexible circuit boards, wherein all connection lines can converge on a connection board, which has, for example terminals and can come to lie in the installed state of the wall panel behind a baseboard. The LEDs of the wall cladding can thus be controlled via commercially available cables, which are connected to the terminals of the connection board, and supplied with electrical energy. At the end of the manufacturing process, a leveling material and a fleece as a holding material can be applied, whereby the luminous wall cladding is completed on both sides. Thus, in a fast and inexpensive process, a large-area, selectively luminous wall panel can be produced, which is adaptable to individual requirements.

The present invention will now be described by way of example with reference to the accompanying drawings. Show it:

Fig. 1 (a) is an exploded view of an inventive

Wall cladding and (b) an isometric view of the wall cladding of Fig. 1a according to the invention; a further embodiment of the invention

Wall cladding in plan view; and

(a) a side view of a wall cladding with bonding wires contacted on a printed circuit board and (b) bonding wires contacted directly on a light source.

Fig. La shows a wall panel according to the invention, which is designed in this embodiment as a luminous wallpaper 1. The wallpaper 1 comprises a carrier material 10, which is formed by a tape web, for example. In the substrate 10 recesses 12 are provided, in which light emitting diodes 14 come to rest. The light-emitting diodes 14 are soldered to flexible circuit boards 16, the circuit boards 16 on a side opposite the light-emitting diodes comprising four connection pads 18, which are in electrical contact with the light-emitting diodes 14. Around the LEDs 14 is on the boards 16 an adhesive Layer 20 is arranged, which connects the boards 16 with the substrate 10.

Fig. Lb shows the wallpaper of Fig. La in the assembled state, wherein the connection pads 18 of the boards 16 are connected by bonding wires 22. For this purpose, two connection pads 18 are electrically connected to one another, so that a bonding wire 22 is connected in each case to a connection pad 18 and a parallel or series connection of the light-emitting diodes 14 is made possible.

FIG. 2 shows a further embodiment of the wallpaper 1 according to the invention in plan view, wherein a multiplicity of light-emitting diodes 14 are visible through the wallpaper 1. The LEDs 14 represent the letters "A" and "m". The boards 16 are not shown in FIG. By way of example, the course of four bonding wires 22 between two light-emitting diodes 14 is shown. It is understood that the bonding wires 22 are usually not visible in plan view of the wallpaper 1. A first pair of bonding wires 22a, 22b is laid on the shortest path between the light emitting diodes 14a, 14b, whereby only a small length of the bonding wires 22a, 22b is required.

Alternatively, a second pair of bonding wires 22c, 22d is arranged in serpentine fashion between two light-emitting diodes 14c, 14d, which may result in a certain flexibility of the bonding wires 22c, 22d relative to the carrier material 10, which may be necessary in particular with flexible carrier materials 10. Furthermore, it is also possible to lay several bonding wires 22 in parallel in order to operate the LEDs 14 with higher currents. In a lower region of the wallpaper 1, a contact board 24 is further arranged, on which (not shown) bonding wires 22 can be contacted to supply the LEDs 14 of the wallpaper 1 with electrical energy. The contact board 24 can be arranged, for example, behind a baseboard.

A light-emitting diode 14e is also connected to blind bonding wires 22e. The bonding wires 22e extend substantially star-shaped from the light-emitting diode 14e. The bonding wires 22e can thereby dissipate heat generated by the light emitting diode 14e well to the environment.

In Fig. 3, two possible connection variants for the LEDs 14 are shown. Thus, FIG. 3 a shows a light-emitting diode 14 which is arranged in the carrier material 10 and which is in electrical contact with a circuit board 16. On the board 16, two bonding wires 22 are welded. In Fig. 3a, a holding material 26 is also shown, which is applied to the carrier material 10 in a direction shown by arrows. If holding material 26 and carrier material 10 lie on top of each other, the sinkers 16 and the bonding wires 22 are additionally fixed by the holding material 26 and run directly on the carrier material 10.

Alternatively, according to FIG. 3 b, the bonding wires can also be connected directly to the light-emitting diode 14, in that the bonding wires 22 are connected directly to connection surfaces or contacts of the light-emitting diode 14. LIST OF REFERENCE NUMBERS

1 wallpaper

10 carrier material 12 recess

14, 14a, 14b, 14c, 14d, 14e light emitting diode

16 board

18 connection pad

20 adhesive layer 22, 22a, 22b, 22c, 22d, 22e bonding wire 24 contact board 26 holding material

Claims

Sponsor claims

Wall covering (1), in particular wallpaper, having

at least one layer of a carrier material (10),

at least two circuit boards (16) connected to the carrier material (10), to which lighting means (14) can be contacted, and at least two lighting means (14) which are mounted on the sinkers (16),

By doing so, that is

at least two light sources (14) are arranged on separate boards (16).

Wall cladding (1) according to claim 1,

By doing so, that is

essentially each light source (14) on a separate board

(16) is arranged.

Wall covering (1) according to claim 1 or 2,

By doing so, that is

in each case a luminous means (14) is arranged on a first side of the circuit board (16) and the circuit board (16) has on a second side at least two contact surfaces (18) which are electrically connected to the lighting means (14).

Wall cladding according to claim 3,

characterized in that the contact surfaces (18) with lines (22), in particular bonding wires, are electrically contacted.

Wall cladding (1) according to any one of the preceding claims, characterized in that e

Each board (16) with a fixed bulb (14) has a maximum height of less than 3 mm, in particular less than 1 mm.

the carrier material (10) has cutouts (12) which are adapted to the size of the lighting means (14), the lighting means (14) being visible through the cutouts (12).

Wall cladding (1) according to one of the preceding claims, characterized in that

an at least partially applied layer of a holding material (26), wherein the boards (16) between the carrier material (10) and the holding material (26) are arranged.

Method for producing a wall covering (1), in particular a wallpaper, which

at least one layer of a carrier material (10),

at least two circuit boards (16) connected to the carrier material (10), to which illuminants (14) can be contacted, and at least two illuminants (14) which are fastened to the circuit boards (16), wherein at least two illuminants (14) are on separate circuit boards (16) are arranged, and,

the method includes that the circuit boards (16) are arranged on the carrier material (10), and

the boards (16) are electrically contacted.

Method according to claim 8,

By doing so, that is

Lines (22), in particular bonding wires, are laid, which the

Contact boards (16) electrically.

Method according to claim 8 or 9,

By doing so, that is

the carrier material (10) is perforated before the placement of the boards (22) where the lighting means (14) are arranged.

Method according to one of claims 8 to 10,

By doing so, that is

the boards (16) before being arranged on the carrier material (10), in particular on the side which comes to rest on the carrier material (10), are coated with adhesive (20).

Method according to one of claims 8 to 11,

By doing so, that is

the procedure is carried out on an XY table, the X-

Y-table in particular has a width of greater than 0.6 m.

Method according to claim 12,

By doing so, that is

for contacting with bonding wires (22) a bonding head through the X

Y-table is moved. Method according to one of claims 8 to 13,

By doing so, that is

a compensation material is applied to the carrier material (10), which has recesses (12) for the boards (16) and / or for lines (22).