Technical field

The present disclosure relates to lighting devices.

One or more embodiments may be used, for example, in the show-business and entertainment sector.

Technological background

Lighting devices that are able to emit light radiation of high intensity find application in sectors, such as the show-business and entertainment sector.

This may be the case, for example, of the products commercially available from the present applicant Clay Paky under the brand name AXCOR (see, for example, claypaky . it ) .

The modalities of use of such lighting devices frequently entail carrying and, in general, handling thereof with the need to take into account various factors .

For instance, the above devices may be used for lighting of stages that are each time set up even for single events (consider, for example, concerts hosted in stadiums and arenas in the course of tours) and thus frequently need to be carried/handled .

Also in sectors other than the show-business and entertainment sector, mentioned herein purely by way of example, there may on the other hand arise the need to apply a marking on devices of this nature, i.e., characteristic information regarding (i.e., uniquely linked to) the individual device: for example, a serial number, a unique identifier (UID) , and a production lot.

The document US 9 736 541 Bl describes a solution developed with particular attention paid to the possible application in the sector of set-top boxes (STBs) . The solution envisages processing a visual code that can be used for functions of navigation, control , and/or other commands .

The document US 10 638 571 B2 ( to which EP 0 041 321 Bl corresponds ) describes a method for marking lighting devices , in particular street lighting devices , in a network that can be controlled via a server . Each device is equipped, in its operating state , with a mark, in practice a label , such as a QR code visually recogni zable and usable for identi fying the lighting device .

As will be seen in what follows , these solutions are not without various drawbacks , above all (but not only) in view of a possible application in the showbusiness and entertainment sector .

Obj ect and summary

The obj ect of one or more embodiments is to provide a lighting device that will be able to overcome the drawbacks outlined previously .

According to one or more embodiments , the above obj ect can be achieved thanks to a method having the characteristics recalled in the ensuing claims .

One or more embodiments regard a lighting device usable according to the above method .

The claims form an integral part of the technical teachings provided herein with reference to the embodiments .

Brief description of the drawings

One or more embodiments will now be described, purely by way of non-limiting example , with reference to the annexed drawings , wherein :

Figure 1 illustrates a lighting system where embodiments as described herein can find application;

Figure 2 is an overall view of a lighting device according to some embodiments ; and

Figure 3 illustrates the possible layout of a data file that can be produced according to some embodiments .

It will be appreciated that , for clarity and simplicity of illustration, the various figures may not be reproduced in the same scale .

Detailed description

In the ensuing description, various speci fic details are illustrated in order to enable an in-depth understanding o f various examples of embodiments according to the disclosure . The embodiments may be obtained without one or more of the speci fic details , or with other methods , components , materials , etc . In other cases , known structures , materials , or operations are not illustrated or described in detail so that the various aspects of the embodiments will not be obscured .

Reference to "an embodiment" or "one embodiment" in the framework of the present description is intended to indicate that a particular configuration, structure , or characteristic described in relation to the embodiment is comprised in at least one embodiment . Consequently, phrases such as " in an embodiment" or " in one embodiment" that may be present in various points of this description do not necessarily refer exactly to one and the same embodiment . Moreover, particular conformations , structures , or characteristics may be combined in any adequate way in one or more embodiments .

The references used herein are provided merely for convenience and hence do not define the sphere of protection or the scope of the embodiments .

Once again for brevity and simplicity of treatment , and unless the context were to indicate otherwi se , in the annexed figures parts or elements that are similar or identical are designated by the same references , without repeating the corresponding description for each figure .

In Figure 1 , the reference 10 designates as a whole a lighting system that can be used, for instance, in the show-business and entertainment sector.

It may, for example, be a lighting system comprising a plurality of lighting devices Fl, F2, ..., Fn-1, Fn mounted on a supporting structure for lighting one or more elements L (for example, people and/or objects) that are located on a lit-up scene (for example, singers, musicians, and corresponding instruments) .

Lighting systems of this nature are designed to operate in a dynamic way, providing a wide range of lighting effects such as to involve both the orientation of the lighting beams (which move in space) and the mode of emission of the beams (turning-on, turning-off, variation of colour, stroboscopic effects, etc.)

This may occur under the control of a control unit (or console) CU, capable of sending to the lighting devices Fl, F2, ..., Fn-1, Fn (for example, in wireless mode) respective control signals for implementing a light management that is outlined by a light designer and can be stored in the control unit CU in view of its implementation throughout the duration of the show.

In this context, it is possible to benefit from the characteristics of systems of a DMX (Digital Multiplex) type or, more precisely of a DMX512 type, which is a well-known standard used for controlling stage lighting in the show-business sector, for example at an RDM (Remote Device Management) level, RDM being a communication protocol based upon DMX for bidirectional communication between a light console, such as the control unit CU, and a lighting source.

In summary, a lighting system like the system 10 of Figure 1 comprises a certain number of lighting sources (or fixtures) Fl, F2, ..., Fn-1, Fn, the operating parameters of which ( turning-on/ turning-off , intensity of the lighting beam emitted, movements of pan & tilt, chromatic characteristics of the radiation emitted, etc.) can be controlled via the control unit or console CU.

Systems of this kind are known in the art in a wide variety of possible solutions of implementation, which renders it superfluous to provide a more detailed description herein.

Figure 2 illustrates a possible embodiment of a lighting device Fl, F2, ..., Fn-1, Fn that may be used in a lighting system 10, as illustrated in Figure 1.

According to a possible configuration (in itself known) , the device, denoted as a whole by Fj , comprises a base 12 for enabling mounting thereof on a supporting structure (it may, for example, be a stage structure in a theatre, an arena, or on the site of a show-business event, as exemplified in Figure 1) on which a fork-like support 14 is mounted.

The fork-like support 14 is orientable, for example through 360°, about an axis X14 (which is vertical in the figures) and supports with its arms or prongs a mobile head 16 orientable with a general panning movement about an axis X16 (which is horizontal in figures) .

Mounted in the head 16 is a light source LS (for example, a laser-diode RGB light source) , which is to produce a lighting beam that exits from the head 16 through a front optics 160, in a direction substantially aligned with a longitudinal axis of the mobile head, designated by X10.

The combined movement about the axes X14 and XI 6, governed via motor-drives (not visible in the figures) arranged, for example, in the base 12 and in the forklike support 14 (i.e., in the head 16) leads the lighting beam projected through the front optics 160 to perform a scanning movement that is able to cover a volume greater than a half-space. With the exception of what is recalled in greater detail in what follows, the overall structure of a device Fj and the modalities of performance of the aforesaid scanning movement must be deemed known in the art, which renders it superfluous to provide more detailed indications in the framework of the present description.

As represented, once again with a dashed line, in Figure 1, the light source LS is driven by electrical circuitry CE (comprising, for example, a digital-signal processor - DSP - and associated power circuits) configured, in a way in itself known, for driving the source LS as a function of control signals sent, for example in wireless mode, by the control unit CU.

In general, it is desirable for the commands sent by the control unit CU to the individual lighting devices Fl, F2, ..., Fj , ..., Fn-1, Fn to have the possibility of being different from one another.

In this way, each individual device Fj can be governed according to modalities of its own, virtually envisaging different modalities for each lighting device Fl, F2, ..., Fj, ..., Fn-1, Fn .

This result is evidently facilitated by the fact that the control unit CU knows the characteristics (and location) of the lighting devices Fl, F2, ..., Fj , ..., Fn- 1, Fn, this to prevent, just to provide an example, the unit CU from sending to a certain device Fj a command that the device is not in a condition to implement, for example in so far as the device is of a model not prearranged for performing that particular lighting function .

Hence the need to conduct rapidly and in a reliable way a "census" of the devices Fl, F2, ..., Fj , ..., Fn-1, Fn, identifying characteristics thereof, such as serial number, the unique identifier (UID) , the production lot, etc . This marking operation may prove anything but easy to carry out .

This applies, in particular, to the show-business and entertainment sector: a system 10 as illustrated in Figure 1 may in fact comprise even hundreds of devices Fl, F2, ..., Fj , ..., Fn-1, Fn, mounted, frequently in not easily accessible conditions, in an installation that is to be rendered operative in short times, maybe in view of use thereof for a single event.

The above in conditions where it is far from easy and convenient to access rapidly the aforesaid characteristic information (for example, serial number, identifier UID, production lot, etc.) linked in a unique way to each individual device. On the other hand, this information is frequently carried by an (electrical) signal stored in the device itself, for example in a memory 100 comprised in the circuitry CE .

At least in principle, it would be thinkable to resort to the solution proposed in US 10 638 578 B2 (to which EP 3 041 321 Bl corresponds) , i.e., "labelling" the individual devices Fl, F2, ..., Fn-1, Fn with labels that bear QR codes that can be read optically, for example via a normal smartphone.

In the context considered herein (consider, for example, lighting systems, that are to be used in the context of tours and are hence installed and dismantled at each show, with the devices Fl, F2, ..., Fn-1, Fn continuously handled also for operations of packaging and transport) such a solution is exposed to various drawbacks .

A label degrades in fact over time, for example, since it risks getting scratched, until it becomes illegible and hence useless; this may also happen when the device is mounted on a truss with the label that ends up in a position poorly lit up and is hence di f ficult to read .

Moreover, an adhesive label may be removed (perhaps inadvertently) during handling of the device , which, as has been seen, may be a frequent event .

In some cases , certain information stored in an internal memory of the lighting device may prove inconvenient to display on a label or runs the risk of being read and reproduced incorrectly on a label .

In a complementary way, some information may be considered proprietary, so that it may not be desirable to be seen reproduced in an evident way on a label applied on the device .

Again, once a label is applied on the device , it cannot be easily updated in the case where some information changes format or meaning, unless the device that already is in the hands of the user is called back to the manufacturer to update the information or else unless updated labels are distributed .

Once again in principle , it would be thinkable to resort to a certain extent to the solution proposed in US 9 736 541 Bl , for example requiring that , upon switching-on, each device Fl , F2 , ..., Fn- 1 , Fn should communicate its data to the control unit CU .

This solution implies recourse to speci fic communication protocols and may prove complex to implement : it may in fact require the control unit CU to have available preventive information on the position of installation of the devices Fl , F2 , ..., Fn- 1 , Fn .

It will on the other hand be appreciated that the problems highlighted herein are to a maj or extent irrespective of the nature and meaning of the marking information ( for example , serial number, UID, production lot , etc . ) uniquely associated to the lighting device ( Fj ) .

The examples considered herein tackle in fact the technical problem linked to the fact that, whatever its nature and meaning, this information may not be presented adequately on the outside of the device Fj , for example in so far as it is rendered illegible or has been removed from the device.

The examples considered herein exploit the fact that lighting devices like the device Fj of Figure 2 can be equipped (or be already equipped, for different purposes) with a display 102, such as a liquid-crystal display (LCD) connected to the circuitry CE (hence to the memory 100) and mounted, for example, in the base 12 so as to be visible also when the device Fj is installed.

In this way, an electrical marker signal that carries marking data characteristic of the individual device Fj , such as serial number, UID, production lot, etc., for example as stored in the memory 100 can be presented on the display 102, for example as QR code, so that it can be easily read by any mobile device, such as a smartphone MP.

In this way, by reading the above code it is possible to generate a file as schematically represented in Figure 3, i.e., a file in which, associated to each device Fj, j = 1, 2, ..., n-1, n is a corresponding information record RIj, j = 1, 2, ..., n-1, n, containing respective marking information, for example the serial number, the UID (e.g., UID : 4350-3C0587D0 ) , etc.

The use that the reading device MP (for example, a smartphone) can make of the code read can hence be comprised in an extremely wide range, exploiting, in particular, the reliability of reproduction, and hence reading, of the code itself.

The solution proposed herein overcomes the drawbacks outlined previously.

In the first place, a display like the display 102 is rather robust in regard to wear. Even though it is subj ect to scratches , it is unlikely to become altogether illegible . This applies also in the case where it ends up in a position poorly lit up by ambient light , with the display that can be lit up in a usual way, even with various levels of brightness .

Once again, a display like the display 102 of Figure 2 is hard to remove during handling of the device , without damaging the device in a serious and evident way, consequently in a manner that is easily detectable .

Albeit rather rich from the information standpoint , an electrical marker signal stored in an internal memory of the lighting device , such as the memory 100 , lends itsel f to being presented on a display 102 , possibly divided into a number of screenfuls that can be selected via navigation buttons 104 .

All the foregoing is obtained avoiding the risk o f incorrect reading or reproduction on a label .

By operating, in a usual way for various applications , the navigation buttons 104 it is also possible to cause information considered proprietary not to be displayed in a stable way, but to be presented on the display only in response to an explicit command .

The solution proposed herein is simple to implement , does not entail recourse to speci fic communication protocols , and most importantly it suited to gathering and supplying to the control unit CU information on the position of installation of the device Fl , F2 , ..., Fn- 1 , Fn : for example , an operator can move along a truss , on which n devices Fl , F2 , ..., Fn- 1 , Fn are mounted and reading the corresponding data from the displays 102 so as to be able to supply to the unit CU a file like that of Figure 3 , with the indication of the order of installation of the devices , along with the corresponding characteristics .

Display of the information on the display 102 does not require the device Fj to be turned on (i.e., with the source LS that emits light radiation) , it being possible, instead, to use a buffer battery 106 associated to the circuitry CE for lighting up the display 102 for the time necessary to show a code (e.g., a QR code) .

Furthermore, the display that appears on the display 102 may be automatically updated in the case where some marking information changes format or meaning as a result of an update (for example, of the memory 100) however implemented. Codes such as the QR code considered here are in fact generated by the internal software of the device: hence, an update of the software (even on older devices, the so-called "legacy" devices) can show all the QR codes necessary for the operators and can improve over time.

It has been found that a QR 1 version (21 x 21 pixels) is altogether satisfactory for the purposes considered herein. The increase in resolution of the display 102 and of the QR code may enable an increase of the amount of information displayed.

Without prejudice to the underlying principles, the details of construction and the embodiments may vary, even significantly, with respect to what has been described herein purely by way of non-limiting example, without thereby departing from the sphere of protection, as this is specified in the annexed claims.

LIST OF REFERENCE SIGNS

Lighting system 10 Lighting devices Fl , F2 , Fn- 1 , Fn Element lit up L Control unit CU

Base 12

Fork-like support 14 Orientation axis X14 Mobile head 16 Orientation axis X16 Light source LS

Light-proj ection optics 160 Longitudinal axis X10 Processing circuitry CE Memory 100 Display 102

Navigation buttons 104 Code QR

Smartphone MP