Lighting device made up of lighting elements and striplight made up of a plurality of such lighting devices

Said lighting device is made up of lighting elements (L1, L2, . . . , L20) arranged on a mounting board (PS1, PS2, etc.). The one or more boards are arranged so as to supply light with a predetermined coverage.The boards comprise a plugging system (C1, C2, C3, P1, P2, P3) for connecting said lighting elements. The mounting of such a device using a threaded rod 7 makes it possible to obtain easy maintenance of the device of the invention. This device can easily be used to form striplights.Use: Lighting of car parks, meeting rooms.

The present invention relates to a lighting device made up of lighting elements and a supply circuit for powering said elements.

The present invention also relates to a striplight made up of a plurality of such lighting devices.

Such devices are generally known, especially those that use LEDs as lighting elements. LEDs provide powerful light considering the electric power they consume. Many applications require intense omnidirectional lighting, while LEDs instead provide highly directional light outputs.

The aim of the invention is to provide a lamp that benefits from the efficiency of LEDs and which lights in an omnidirectional manner, while making it possible to obtain high light intensity.

For this purpose, a device of the type mentioned in the preamble is characterised in that said elements are organised in at least one assembly of at least one lighting element.

According to one aspect of the invention, the device comprises a plurality of said assemblies arranged on at least one mounting board and arranged so as to provide lighting according to a predetermined coverage.

Thus, by increasing the number of assemblies guided in different directions, omnidirectional lighting or lighting having a given light coverage is obtained, as well as luminosity which can be stronger.

One interesting application of the invention is that which relates to lighting in car parks, which requires easy maintenance and installation.

For maintenance, the invention proposes a system for plugging in boards in order to facilitate the replacement thereof in the event of a fault. As regards ease of installation, the supply circuit is of a type controlled to adjust the supply voltage of the lighting elements by also compensating for possible voltage drops due to the length of the power cable intended for powering the striplight. Indeed, when dealing with a striplight comprising such devices, the accessible voltage at the end of the striplight is considerably lower than at the start. It should be noted that the power cable, preferably carrying a low voltage, does not require any precautions or authorisation for the installation of such a striplight.

In these figures, the common elements all have the same references in all the figures.

InFIG. 1, the lighting device shown is made up of a circular base5, for example. The end of a threaded rod7is secured to the centre of this base. A supporting plate10with said threaded rod7passing through same is secured at a certain distance from the base5. This distance is determined by a nut, not shown, which blocks the vertical movement of this supporting plate10. Light facets F1, F2, F3, F4and F5are arranged on said supporting plate. Mounting boards are secured to said facets, some of which (PS1, PS2, etc.) are only referenced in the figure in order to avoid crowding it. An assembly E1of lighting elements L1to L20is placed on each of these boards, as shown inFIG. 2. The positioning of the facets and even of said boards makes it possible to adjust the direction and spatial distribution of the light beams.

FIG. 3shows that the mounting boards PS1are removable with a view to facilitate the replacement thereof. For this purpose, connectors C1, C2, C3, etc. secured to the boards PS1are provided on said boards and engage with sockets P1, P2, P3respectively arranged on the light facets (F1, etc.).

The lighting device comprises a protective dome made of transparent material such as polymethyl methacrylate, better known by its commercial name of “Plexiglas”. This dome20is provided with a semi-spherical shape, and its base rests on the supporting plate10. Lugs25,26,27, . . . ,31are provided in order to centre said dome, as shown inFIG. 4. These lugs are arranged at the periphery of the supporting plate10. A hole40at the top of this dome allows the threaded rod7to be pass through same. Another hole61, visible inFIG. 4, is made in the supporting plate10for passing a cable63. A nut43holds said dome20against the supporting plate10.

A supply circuit60is placed under the light facets F1to F5. Said circuit is connected to the power cable63which passes through the hole61. Said circuit is made up of a transformer65, control electronics67and an accumulator system69. The transformer is of a controlled type which provides, in particular for lighting, a predetermined voltage for a voltage range which is applied at the input thereof. The accumulator69preserves the lighting during a power cut and can also supply a backup voltage to at least one lighting element.

The mounting of the device of the invention by means of a threaded rod allows for easy removal which, associated with the possibility of easily changing the mounting boards (PS1etc.) allows for very easy maintenance of said device.

Advantageously, the devices of the invention are well suited to a strip configuration. The invention makes it possible to play with the distribution of light by tilting the various facets (F1, F2, etc.) in order to obtain the required distribution or coverage of each device. Moreover, the voltage control provided by the controlled transformers makes it possible to obtain long-span striplights without any deterioration of the light intensity at the end of the line.FIG. 6shows the structure of such a striplight, which is made up of a plurality of devices in accordance with the invention100,101,102,103, which are all connected to a power cable63.

One field of application of such a striplight is the lighting of a car park. This is shown inFIG. 7. The car park is made up of two rows: a first row for vehicles V1, V2, . . . , V5and a second row for vehicles V11, V12, . . . , V15. A striplight is assigned to each of these rows. A first striplight is assigned to the first row and is made up of lighting devices111,112,113,114and115. These devices are powered by the cable63. A second row is illuminated by the lighting devices121,122,123,124and125. They are powered via a power cable63′. It should be noted that since such striplights can have a low voltage value, these lamps do pose any danger during crashes with manoeuvring vehicles.

Another example of a use of the invention is shown inFIG. 8. In this example, the lamp is attached to the ceiling of a room and a video camera210has been inserted for surveillance of this room. The lens of this camera is flush with the outside of the facet F5, as shown inFIG. 9. Its arrangement is such that it makes it possible to view objects according to an angle α which is as large as possible, and it is recessed enough to avoid the glare from the surrounding LEDs.

This camera215is connected to a PLC device217(device for coupling by powerline communication) which makes it possible to transmit a supply current and data over a single line, and thus to transmit the images captured by the camera215to a surveillance centre300in order to be viewed on a screen310. The images can be accessed in the surveillance centre300by another PLC device317, by travelling through the cable63. Reference330indicates a power source for at least one lamp. The surveillance centre300can be provided with various PLC devices320,321, etc., assigned to various cameras which are part of various lamps.

The lighting device can also be used in the context of lighting a room such as an office or a meeting room. It is possible to attach a strong Wi-Fi booster of the type used in this type of room to the base5of the lamp. This is indicated by reference350. This allows the participants meeting in the work room to connect easily to the Wi-Fi network.