DE202004000810U1 - Illuminated glass tile - Google Patents

Abstract

Illuminated tile (1) for attachment to a fastening surface (4), comprising a tile plate (2) with an underside (3), characterized in that at least one illuminant (7) is provided, the light of which is essentially on the underside (3) of the Tile plate (2) is directed.

Description

I. Field of application

The invention relates to illuminated Tiles, in particular illuminated tiles made of transparent material.

II. Technical background

Tiles, such as those used indoors buildings or outdoors as a floor covering or wall cladding are usually made of clay, Kaolin, quartz or feldspar with mineral additives Colors and other properties influence, are added. For the use inside, ceramic tiles are known above all, the to form a non-slip and easy-care surface with a special treatment, especially with a glaze are. The glazed surface can be shiny for optical design, semi-matt or matt, flat, profiled, wavy or decorated his.

For example, indoors with tiled surfaces additional To achieve optical effects, tiles were provided with an opening, in which a lamp, such as. B. an electric lamp has been. The optical effect emanating from these lamps concerns essentially the lighting effect of the lamp itself, regardless of the design and type of the tile surrounding the lamp.

Another disadvantage is that when laying such provided with a lamp Tile first the lamp on the mounting surface, such as. B. the wall or the floor must be introduced and relocated, and then - after a tile adhesive is applied to the mounting surface around the lamp became a Tile with the appropriate through opening. To Several individual work steps are required on site must be carried out during installation and laying.

Floor or wall claddings are also known made of transparent and backlit glass plates. However are such glass plates included in a frame construction and therefore not to be regarded as self-supporting tiles.

III. Presentation of the invention

a) Technical task

It is therefore the object of the present invention to create an illuminated tile that is improved upon optical effect, especially due to the self-supporting nature the tile itself is easy and quick to install at the same time.

b) solving the problem.

This task is due to the characteristics of claim 1 solved. Advantageous embodiments result itself from the subclaims.

According to the invention, an illuminated tile having a tile plate with an underside for attachment on a mounting surface proposed in which at least one illuminant is provided, whose light beam essentially on the underside of the tile plate is directed.

The main idea of the invention is in that when the light beam emanating from the illuminant strikes on the underside of the tile plate, the light beam accordingly the material properties of the tile slab in whole or in part due to this goes through and / or wholly and / or partially scattered or in different directions is reflected.

The proportion of the light source emanating from the lamp Light shining through the plate-shaped tile passes through, be visible in a different color than the portion of light that illuminates the underside of the plate-shaped tile the plate-shaped Tile is reflected or scattered.

The advantage of the invention is in that at least two-tone lighting effects with one and the same illuminated tile can be achieved. Furthermore is easier to manufacture, because in the tiles no special through openings must be provided to arrange the lamp.

The tile plate is preferably present essentially made of a transparent material or at least partially transparent to Light waves in for visible range of the human eye. The tile slab is especially made of glass or a transparent or partially made of transparent plastic material, and in particular dimensioned so that it is self-supporting, i.e. for example walkable, is.

The plate-shaped tile be composed of several elements. These elements are preferably in the form of flat, plate-shaped elements, the assembled into a tile and connected to each other in a suitable manner are. The different elements can have different degrees of light transmission exhibit. You can the individual plate-shaped elements an illuminated tile each made of a uniform material or each made of different materials.

In particular, it is proposed that the individual plate-shaped Elements each over have different colors so that at least partially translucent disc-shaped Elements in the operation of the lamp each have a different Have color.

A particularly effective effect the refraction of light is achieved when the tile plate or single plate-shaped Elements from which the tile plate is composed, each individually are ground. In doing so, each for themselves and in cooperation appealing light refraction effects with the other elements of the illuminated tile achieved.

Furthermore, positive lighting effects the tile plate can be achieved in that the surface and / or back the tile slab shiny semi-matt or matt, flat, profiled, wavy or decorated is, in particular sandblasted, whereby the light beam of Illuminants evenly and when passing through the tile plate is scattered effectively.

By the largest possible proportion of the illuminant outgoing light beam for illuminating the tile plate and To use lighting around the tile plate, im on the mounting surface attached condition of the illuminated tile the at least one Illuminant in the area between the underside of the tile plate and the mounting surface.

Due to the heat of the at least one lamp is the tile plate from the lamp kept at a distance. For this purpose, at least one is proposed Spacers must be provided on the underside of the tile plate. Preferably is a spacer in the form of a surrounding frame accordingly the geometry of the tile slab. This will make it stable Distance of the tile plate from the illuminant guaranteed.

Is the at least one spacer story formed from the same material with the tile plate, so can the step of forming a spacer at the bottom of the Tile slab with the manufacturing step for making the tile slab be put together. This makes it easy, quick and inexpensive Manufacture of the illuminated tile possible.

For retrofitting already manufactured The at least one spacer can be an aluminum profile, in particular in the form of an upright profile or a C profile his. In addition to the excellent stability properties, this leads light weight of aluminum does not increase the total weight of the Tile slab, which is particularly desirable when mounting on wall surfaces.

In addition, by the multiple spacers each set different distances be placed so that the tile slant to the mounting surface is. This results in further design options through one of Illuminated tile protruding from the wall or when used in Corner areas of interiors.

Furthermore, the illuminated Tile at least one illuminant carrier on which the illuminant is arranged. This gives rise to the possibility of several different ones Illuminants on a illuminant carrier in a specific configuration or to arrange geometry to achieve special lighting effects.

Is the bulb holder in shape a carrier plate provided there is a mounting surface for several Illuminants arranged spaced apart in one plane can be. For this purpose, the illuminant is on the illuminant carrier or the carrier plate firmly arranged and in particular soldered to the carrier plate. Preferably becomes a circuit board as a carrier plate used.

Another way to get the lamp or lamps to keep spaced from the underside of the tile plate in that the at least one spacer between the tile plate and the bulb holder is arranged, in particular with the tile and the lamp support is connected, and in particular is glued or screwed.

An advantage arises if the Tile plate, the at least one spacer and the support plate are formed and are connected to one another in such a way that a closed one for receiving the at least one lamp Form the recording room. This recording space serves as a housing for Protection of the electrically operated lamp. Furthermore the result is an illuminated tile in a compact form that arranged as a mounting unit in one step on a mounting surface can be.

Find preferably as illuminants so-called LEDs or luminescent diodes use a high Lifespan and a big one Have operating temperature range. By using flatter Light-emitting diodes have other advantages: On the one hand, there is Radiation stronger focused on the main direction of light, so a larger proportion of light directed towards the underside of the tile plate and not in the direction parallel to the tile level.

On the other hand, the flat LEDs are due of less overcoming towards the interior of the illuminated tile (in the event that an indoor space formed by tile plate, spacer and illuminant carrier is) visually unobtrusive and above In addition, a height determined by the at least one spacer Such illuminated tile can be kept low.

Flat light-emitting diodes are preferably used, the height of which is approximately 1 to 3 mm, while the height of the spacer is of the order of 10 mm to approximately 16 mm. A glass tile with a standard thickness of 8 mm can be used as the tile plate, with a total height of the illuminated tile or results in a tile module thickness of approximately 27 mm. However, it is also possible to change the thicknesses of the components used, ie tile plate, spacer and illuminant holder with LEDs for a customer-specific adjustment.

Are preferred for this Use of so-called SMD (Service Mounting Device) LEDs. Because these SMD LEDs are very flat (height corresponds to in about 1 mm) is a larger distance the LED can be reached from the tile plate, causing heating the tile slab is reduced by the heat. there is the height of the light emitting diodes less than 3 mm, in particular less than 2 mm, in particular less than 1.5 mm.

The multiple can be on the illuminant carrier LEDs are arranged so that they are spaced apart together form a rectangular grid. However, are preferred the LEDs are not evenly distributed, but grouped together in groups to form several LEDs, the distance between the LEDs within a group is smaller is the distance between the groups, in particular at most 30%, especially at most 20%, especially at most 10% of the distance between the groups is.

The groups are preferably made accordingly the packet-like combination of the individual diodes of a common one electrical shading for assigned the supply of electricity, the diodes forming a group which are preferably on a diode carrier assigned to them, for example a circuit board. Because such flat LEDs frequently a slightly bluish light and not a pure white Emitting light, a filter must be placed in front of it in order to emit white light achieve. This filter is preferably at the bottom of the Tile plate arranged, in particular attached to it, in particular story trained along with this.

Alternatively to the grid-like or can arrange in groups the several light-emitting diodes along a rectangular tile only along the longitudinal edges, especially along three longitudinal edges, in particular along two longitudinal edges, especially two opposite ones Longitudinal edges, and in particular along a single longitudinal edge of the carrier plate be arranged.

To display characters or symbols about that also LED display systems (Display components) are used, each in turn several Have LEDs on a common base substrate, the corresponding Control a representation of numbers, letters or characters enable. A particularly good representation is achieved by using a or multiple point matrix systems.

There is also the possibility that the bulb holder is arranged laterally on the spacer, in particular firmly with it is connected, and in particular is glued or screwed. consequently the result is a tile module consisting of tile plate, spacer and illuminant carrier in the form of a board, the thickness of the tile module alone determined by the thickness of the tile slab and the height of the spacer becomes. This makes the tile slab particularly useful when in use as a base plate alone by the at least one spacer supported so that advantageously compressing and resulting damage the board can be prevented ..

The side of the at least one lamp carrier, in particular the carrier plate and in particular the circuit board on which the at least one lamp is arranged, and the underside of the tile plate are preferred arranged parallel to each other. The illuminated tile can thus be used for Cladding or layout of flat surfaces can be used. At the the underside of the tile plate facing surface of the board can be a or several reflectors can be arranged, which are at the bottom The light reflected from the tile panels shines in the direction again Steer the tile plate, whereby the reflector can also be colored.

For connecting electrical cables is advantageously on the back of the lamp holder, in particular the carrier plate, and especially the circuit board, which is opposite the side with the illuminant, a terminal block is provided. Connecting the illuminated tile can thus from outside in a simple manner of the tile module by means of plug connections.

At least one lamp or the light emitting diodes of an illuminated tile are preferably via a electrical circuit powered outside or within that formed by the tile plate, spacer and support plate Inside the tile module.

This supply circuit that with connected to the electrical network or a battery a constant current controller, which is preferably used to control the luminosity is either manually adjustable, for example by adjusting a potentiometer used for this, or regulates itself automatically, about dependent from a brightness sensor that is exposed to daylight. Four light-emitting diodes are preferably combined to form a group and are powered by a constant current source.

The individual LEDs are there electrically connected in parallel within a package, the packets of light-emitting diodes, on the other hand, are connected in series with one another, to enable simple control and constant current control.

The maximum voltage of the power supply is preferably limited to 24 volts in order to be endangered by this low voltage range exclude electric shock etc. and thereby keep the safety requirements low.

The constant current for supply the light emitting diodes usually move between 10 mA and 100 mA.

c) working examples

Embodiments according to the invention described in more detail below with reference to the figures. Show it:

1 : a plan view of a first design of the invention;

2 : a front view in section of the first design along the line AA in 1 , on the left a first embodiment and on the right a second embodiment is shown;

3 : a front view in section of the first design along the line AA in 1 , a third embodiment is shown on the left and a fourth embodiment is shown on the right;

4 : a plan view of a second design of the invention, and

5 : an electrical circuit.

1 shows a top view of a first design of the illuminated tile according to the invention. The illuminated tile 1 includes a tile plate consisting of a glass plate 2a , a spacer 5 , a lamp holder 6 and four LEDs 7 , The glass plate 2a is formed in the form of an elongated rectangle with two longer and two shorter sides.

Furthermore, through the transparent glass plate 2a through the in 1 spacers indicated by the dashed line 5 visible. The spacer 5 is a circumferential edge at the bottom 3 the glass plate 2a educated. The circumferential spacer 5 is at the bottom 3 the glass plate 2a arranged, the dimensions of the circumferential spacer 5 with the dimensions of the glass plate 2a match or the side surfaces of the glass plate 2a each with the corresponding side surfaces of the circumferential spacer 5 are flush with each other or aligned.

Within the by the circumferential spacer 5 enclosed area are on the top of the lamp holder in the form of a circuit board 6 a total of four LEDs 7 each evenly spaced from each other, centered or on a center line that in 1 lies above the cutting line indicated by AA, in the longitudinal direction of the glass plate 2a arranged. In supervision in 1 have the glass plate 2a and the circuit board 6 same dimensions.

2 is a sectional view of the illuminated tile in 1 , Links in 2 is the illuminated tile 1 shown according to a first embodiment. It is used as a spacer 5 an aluminum upright profile is used and to space the glass plate 2a from the board underneath and arranged parallel to it 6 interposed. In particular, the spacer is in the form of the aluminum upright profile 5 an all-round hollow aluminum shaft. Due to the height of the aluminum upright profile 5 becomes the distance of the glass plate 2a to the board 6 established.

In the left in 2 The embodiment shown is the spacer 5 with its upper narrow side 12 on the bottom 3 the glass plate 2a attached to the outer edge and with its lower narrow side 13 at the top of the board 6 that of the glass plate 2a facing, attached.

In contrast, the right in 2 illustrated second embodiment, the board 6 with its narrow side on the side surface of the spacer facing the interior at the lower end 14 of the upright aluminum profile. Hence right in 2 by the height of the spacer 5 the distance of the glass plate 2a from the mounting surface 4 established.

The dimensions of the board 6 are smaller than the dimensions of the glass plate arranged above 2a , ie the area of the board 6 is the amount of the total area of the narrow sides of the upright aluminum profile 5 less than the area of the glass plate 2a ,

As continues in 2 shown are on the board 6 four LEDs 7 at equal intervals with a direction of light to the underside indicated by the arrows 3 the glass plate 2a arranged. Links in 2 are each above the two LEDs 7 filter 11 on the bottom 3 the glass plate 2a arranged. Right in 2 is the bottom 3 the glass plate 2a designed as a sandblasted surface.

3 shows a third and fourth embodiment of the first design of the invention in 1 , The third embodiment on the left in 3 includes a spacer 5 in the form of a C-profile between the glass plate 2a and the circuit board 6 is arranged. The open side of the C-profile 5 is the light emitting diodes arranged on the board 7 the inside of the illuminated tile 1 facing. That of the open side of the C-profile 5 opposite, closed side forms an outer side wall of the illuminated tile 1 ,

As still left in 3 can be seen in the recording room of the C-profile 5 even an electrical circuit 9 to control the LEDs 7 intended. The power supply to the electrical circuit 9 takes place via a power cable 10 and is below the mounting surface 4 laid in the ground or flush-mounted.

Right in 3 is the spacer 5 in one piece with the glass plate 2a formed and protrudes from the outer edge of the glass plate 2a vertically down. The lower narrow side 13 of the spacer 5 lies on the outer edge of the board 6 on and is at it attached.

Furthermore is on the board 6 a terminal block on the underside 8th provided on which an electrical connection cable 10 from the electrical circuit 9 to operate the four LEDs 7 connected. The electrical circuit is located below the mounting surface 4 in the ground or flush-mounted.

Like each one 2 and 3 can be seen form the glass plate 2a , the spacer 5 and the circuit board 6 a recording room in which the LEDs 7 are arranged.

A second design of the invention is in 4 shown. As can be seen in the top view, the illuminated tile is 1 formed square in terms of their geometry, being below the transparent glass plate 2a in each case by the circumferential spacer 5 (dashed line) included area on the board 6 a total of sixteen light-emitting diodes evenly spaced from each other 7 arranged in a grid. There are four LEDs each 7 combined into a group and are each supplied with energy by a constant current source.

5 shows a schematic circuit diagram of the electrical control 9 how to power the LEDs 7 is used. Below are all with the in 1 to 4 Identical reference numbers are also provided with a superscript line and differ in this.

The electrical circuit for controlling the LEDs 3 ' initially includes a multiple constant current source circuit ( 1 ), as in 5 is indicated by the dashed line. The multiple constant current source circuit ( 1 ) in 5 , comprises a total of four identical constant current source circuits, only one constant current source circuit being described in detail below for the sake of simplicity.

The constant current source circuit is essentially an operational amplifier 21 (OPV) and a PNP bipolar transistor 22 built up, the output 1' of the OPV 21 through a resistor R3 to the base terminal of the PNP transistor 22 is connected and the emitter connection of the PNP transistor 22 via a resistor R2 at the inverting input of the OPV 21 connected.

The constant current source circuit is a control circuit in which the between the base terminal and the emitter terminal of the PNP transistor 22 the actual voltage present, which is present at the inverting input via a resistor R2, is compared with the target voltage present at the non-inverting input.

The falls at the base-emitter junction of the PNP transistor 22 applied voltage, ie when the current supplied to the LED via resistor R4 drops, the OPV controls 21 the base connection of the transistor Q1 corresponding to the voltage difference present at its inputs, by that between the base connection and the emitter connection of the transistor 22 applied voltage and thus through the resistor R4, the transistor 22 and to keep a current flowing at the connections b and e connected LED constant.

The resistor R18 and the LED D1 connected in series with the resistor R18 form a voltage divider, a constant voltage corresponding to the forward voltage of the LED being present at the LED D1. A resistor R17 and a potentiometer R19, which are connected in series with one another, are connected in parallel with the LED D1 and in turn serve as voltage dividers in order to divide the constant voltage of the LED and finally to set it by means of the potentiometer R19. The LED also serves to indicate the operating status of the entire in 5 circuit shown.

The voltage across the series resistor R1 at the non-inverting input of the OPV is at the wiper connection 2 ' of the potentiometer R19, so that consequently a constant reference voltage can be set at the non-inverting input of the OPV by means of the potentiometer R19, which in turn enables the voltage between the base connection and the emitter connection of the transistor 22 Voltage and thus that through resistor R4, the transistor 22 and the load or the LED flowing current is adjustable. That is, by means of the potentiometer R19 the level of the load current through the LED or the plurality of LEDs connected to a connection device 23 are connected, is adjustable.

The connection device or the connection strip 23 is used to connect several individual LEDs or preferably several LED packages and has the connections a, b, c, d and the ground connection e. An LED package can in turn comprise a plurality of LEDs connected in parallel with one another.

As in 5 Furthermore, a power supply unit is provided, which essentially has a transformer TR2 with a fuse for transforming a mains voltage to a voltage of 2 × 12V and a rectifier GL1 for rectifying the AC voltage of the secondary coil of the transformer TR2. An electrolytic capacitor C3 serves for voltage smoothing of the rectified output voltage of the rectifier GL1.

1

illuminated tile

2

tile panel

2a

glass plate

3

bottom the tile slab

4

mounting surface

5

spacer

6

circuit board

7

led

8th

terminal block

9

electrical circuit

10

power cable

11

filter

12

upper narrow side

13

lower narrow side

Claims (33)

Illuminated tile ( 1 ) for attachment to a mounting surface ( 4 ), with a tile slab ( 2 ) with a bottom ( 3 ) characterized in that at least one lamp ( 7 ) is provided, the light of which is essentially on the underside ( 3 ) the tile slab ( 2 ) is directed. Illuminated tile ( 1 ) according to claim 1, characterized in that the tile plate ( 2 ) is essentially made of a transparent material, in particular glass. Illuminated tile ( 1 ) according to claim 2, characterized in that the tile plate ( 2 ) is matt, in particular sandblasted, so that the light beam from the illuminant ( 7 ) when passing through the tile plate ( 2 ) is spread evenly and effectively. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that in the on the mounting surface ( 4 ) attached state the at least one lamp ( 7 ) in the. Area between the bottom ( 3 ) the tile slab ( 2 ) and the mounting surface ( 4 ) is located. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that at least one spacer ( 5 ) on the bottom ( 3 ) the tile slab ( 2 ) is provided to the tile plate ( 2 ) from the illuminant ( 7 ) to keep at a distance. Illuminated tile ( 1 ) according to claim 5, characterized in that the at least one spacer ( 5 ) a surrounding frame according to the geometry of the tile plate ( 2 ) is. Illuminated tile ( 1 ) according to claim 5, characterized in that as a spacer ( 5 ) at least two parallel longitudinal profiles are provided. Illuminated tile ( 1 ) according to claim 5, characterized in that each straight side of the tile plate ( 2 ) a spacer ( 5 ), in particular in the form of a longitudinal profile. Illuminated tile ( 1 ) according to claims 5 to 8, characterized in that the at least one spacer ( 5 ) one-story with the tile plate ( 2 ) is made of the same material. Illuminated tile ( 1 ) according to one of claims 5 to 8, characterized in that the at least one spacer is an aluminum profile ( 5 ) is. Illuminated tile ( 1 .) according to one of claims 5 to 10, characterized in that the at least one spacer ( 5 ) is an upright profile or a C profile. Illuminated tile ( 1 ) according to one of claims 5 to 11, characterized in that a plurality of spacers ( 5 ) set different distances so that the tile plate ( 2 ) to the mounting surface ( 4 ) is arranged at an angle. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that the at least one illuminant ( 7 ) on at least one illuminant carrier ( 6 ) is arranged, in particular firmly arranged, and in particular is soldered. Illuminated tile ( 1 ) according to claim 13, characterized in that the illuminant carrier is a carrier plate, in particular a circuit board ( 6 ), is. Illuminated tile ( 1 ) according to claim 13 or 14, characterized in that the at least one spacer ( 5 ) between the tile plate ( 2 ) and the lamp holder ( 6 ) is arranged, in particular with the tile plate ( 2 ) and the lamp holder ( 6 ) is firmly connected, in particular glued or screwed. Illuminated tile ( 1 ) according to claim 15, characterized in that the tile plate ( 2 ), the at least one spacer ( 5 ) and the carrier plate ( 6 ) form a closed receiving space in which at least one illuminant ( 7 ) is arranged. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that at least one light-emitting diode () 7 ) is provided. Illuminated tile ( 1 ) according to claim 17, characterized in that the light-emitting diodes ( 7 ) SMD LEDs are. Illuminated tile ( 1 ) according to claim 17 or 18, characterized in that the height of the light-emitting diodes ( 7 ) is less than 3 mm, in particular less than 2 mm, in particular less than 1.5 mm. Illuminated tile ( 1 ) according to one of claims 17 to 19, characterized in that the plurality of light-emitting diodes ( 7 ) are laterally spaced apart, in particular arranged in one plane, that together they form a rectangular grid. Illuminated tile ( 1 ) according to one of claims 17 to 19, characterized in that the light-emitting diodes ( 7 ) are combined in groups to form a plurality of light-emitting diodes, the spacing of the light-emitting diodes within a group being less than the spacing of the groups from one another, in particular at most 30%, in particular at most 20%, in particular at most 10% of the spacing of the groups from one another. Illuminated tile ( 1 ) according to one of claims 17 to 21, between the light-emitting diodes ( 7 ) and the tile slab ( 2 ) at least one, the light emitting diodes ( 7 ) assigned filter ( 11 ) is provided, which in particular on the underside ( 3 ) the tile slab ( 2 ) arranged, in particular attached to it. Illuminated tile ( 1 ) according to one of claims 17 to 19, characterized in that the light-emitting diodes ( 7 ) in the case of a rectangular tile, are only arranged along the longitudinal edges, in particular along three longitudinal edges, in particular along two longitudinal edges, in particular two opposite longitudinal edges, and in particular along a single longitudinal edge. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that the illuminant carrier ( 6 ) on the side of the spacer ( 5 ) is arranged, in particular is firmly connected to it, in particular is glued or screwed. Illuminated tile ( 1 ) according to one of claims 13 to 24, characterized in that the side of the at least one lamp carrier ( 6 ) on which the illuminant ( 7 ) is arranged, and the underside ( 3 ) the tile slab ( 2 ) are parallel to each other. Illuminated tile ( 1 ) according to one of claims 13 to 25, characterized in that on the back of the illuminant carrier ( 6 ), the side with the illuminant ( 7 ) is opposite, a terminal block ( 8th ) for connecting electrical cables ( 10 ) is provided. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that the illuminated tile ( 1 ) an electrical circuit ( 9 ) assigned, in particular also within the overall dimensions of the illuminated tile ( 1 ) is arranged, which has a constant current regulator for supplying power to the light-emitting diodes ( 7 ) includes. Illuminated tile ( 1 ) according to one of claims 17 to 27, characterized in that in each case four light-emitting diodes ( 7 ) are grouped together and supplied by a constant current source. Illuminated tile ( 1 ) according to one of claims 17 to 28, characterized in that the light-emitting diodes ( 7 ) one illuminated tile each ( 1 ) are connected in series with each other. Illuminated tile ( 1 ) according to one of claims 17 to 28, characterized in that the light-emitting diodes ( 7 ) one illuminated tile each ( 1 ) are connected in parallel with each other. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that the illuminated tile ( 1 ) is supplied with a 24 volt low voltage. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that the constant current for supplying the light-emitting diodes ( 7 ) is adjustable between 10 mA and 100 mA, in particular manually adjustable or automatically adjustable, depending on a brightness sensor that is exposed to daylight. Illuminated tile ( 1 ) according to one of the preceding claims, characterized in that the constant current controller comprises a continuously adjustable potentiometer.