EP3027956B1 - Led-modul - Google Patents

Description

The present invention relates to an LED module (light emitting diode module) for insertion into a luminaire, wherein the LED module comprises a plurality of LEDs (light emitting diodes), and having terminals in the base of the luminaire for replacement of a conventional light source can be used.

Such an LED module is for example from the DE 299 00 320 U1 in which an LED lamp with an external geometry substantially corresponding to a fluorescent lamp is disclosed. The LED lamp each has an electrical connection on each of its end sides in the longitudinal direction, which can be used in conventional plug-in base for fluorescent lamps. Several LEDs are arranged in rows on a printed circuit board as light sources, and furthermore the printed circuit board has reverse polarity protection in the form of a diode in order to prevent current from flowing through the LEDs in the wrong direction. Since the electrical supply differs substantially for a fluorescent lamp and for LEDs, a cable set is still provided, with which the ballast provided for the fluorescent lamp can be bridged, so that the lamp directly to the on-board voltage source of a vehicle, that is to a DC power source, can be connected.

From the DE 10 2004 044 166 B4 an explosion-proof luminaire with LEDs is known as light sources, wherein a plurality of LEDs are fixedly arranged on a light source carrier strip, and a plurality of illuminant carrier strips are mounted in parallel on a light source carrier. However, this device is not suitable for operation with fluorescent lamps.

US 2010/0289428 A1 describes an LED panel light with a number of LED panels that replace a conventional light source as a group of four, for example. These four LED panels form a spare part that can be used instead of the conventional bulb, but the LED panels are supplemented with end caps and connecting devices. For example, the LED panels replace a fluorescent tube. For this purpose, the ballast of the fluorescent tube is also removed and replaced by a new ballast or a control device. This is mounted separately to the LED panels on the corresponding lamp.

It is therefore the object of the invention to provide an LED module for insertion into a luminaire for replacement of conventional bulbs, with which the light output can be improved.

This is achieved in that the LED module has at least two terminals, wherein each of the two terminals can be used simultaneously in another base of the lamp for a light source. In an advantageous manner, one of the two connections can also be used in one base of the luminaire for one luminous means and the other of the two connections can be used simultaneously in another base of the luminaire for a further luminous element, so that the LED module replaces two separate luminous means. Thus, points the LED module on at least two terminals, which are each used simultaneously in at least two different sockets of the lamp as a substitute for at least two separate lamps. The fact that the LED module not only replaces a single light source, both the space of the at least two replaced bulbs, as well as the space normally provided between conventional bulbs can be used as a design space for the LED module. In a plurality of conventional lights, a plurality of conventional bulbs are provided, wherein there are intermediate spaces between the bulbs, which primarily allow a heat dissipation from the individual bulbs. LEDs, however, are very small point sources of light, of which a large number must therefore be provided. Thus, an improved light output can be achieved by means of the teaching of the invention, since then LEDs can be provided in the areas between the replaced conventional bulbs in the context of the LED module.

If such an LED module replaces a luminous means, such as a fluorescent tube, there is the possibility that the LED module for replacing this luminous means is rotatably mounted relative to the pedestals between a release and a locking position. That is, the LED module is used with its contact between or in the base and then by turning the LED module or at least its contacts, i. its connections, twisted between the release and locking position. In the release position, the LED module can be removed from the main body or inserted into it. In the locking position, the LED module is fixed to the main body.

In an LED module to replace two bulbs, which are arranged in parallel to each other in the base body otherwise, usually no twisting of the LED module. Instead, however, it is possible to rotate the base or sockets in the main body, thereby realizing a loosening or fixing of the LED module. There is the possibility that the corresponding base of the lamp have a slide-in channel, which serves for inserting the connections or contacting the LED module. Each of the base and in particular the insertion channel is associated with a latching or locking device in this case. As already stated, in addition to or alternatively to the latching or locking device, a rotation of the base can take place in order to fix the LED module or to permit removal via the insertion channel.

In this context, it is also conceivable that the LED module has its terminals or contacts associated locking device, can be done by attaching the module to the base body after insertion of the terminals in the socket or in the socket on the base body.

Overall, an insertion of the LED module in the body and in particular a fixing of the connections to the sockets for electrical connection can be done in a simple manner, at the same time via such an insertion of the LED module on the base body can be done.

Furthermore, the mounting of such an LED module in a lamp designed easier because not multiple LED modules must be used, but several conventional bulbs can be replaced by only one LED module. This speeds up both the replacement of conventional bulbs with an LED module, as well as the replacement of LED modules in a luminaire.

Conventional bulbs in the context of the teaching of the present invention are primarily fluorescent tubes, but also incandescent lamps, halogen lamps and fluorescent tubes. The term "terminal" refers to the entirety of a terminal, such as the two pin contacts on one side of a fluorescent tube, or the mounting base of an incandescent lamp.

Advantageously, the connections can be used in base for fluorescent lamps. For this purpose, the connection is designed in accordance with a connection on one side of a fluorescent lamp, namely primarily as two mutually remote pin contacts. Primarily, the LED module is used to replace standard fluorescent lamps with 18W to 58W power.

In a preferred embodiment, at least two ports are provided on one side of the LED module, and at least two respective ports on the opposite side of the LED module, respectively. The corresponding connections are provided primarily at the corresponding position on the respective opposite sides of the LED module. That is, the respective terminals are arranged symmetrically to a central symmetry plane parallel to the opposite sides in the LED module.

Notably, the LED module has a length greater than height and width, with the terminals provided on the end sides in the longitudinal direction. Thus, several parallel fluorescent tubes can be replaced by the LED module, especially two parallel fluorescent tubes. Furthermore, the LED module is preferably at least twice as wide as it is high.

In an advantageous embodiment, the terminals serve to attach the LED module in the lamp. Thus, not only an electrical supply is ensured by the terminals, but also fixed and held the LED module in the lamp in position.

Alternatively or additionally, additional fastening means may also be provided on the LED module and / or on the corresponding luminaire, so that the LED module can be fastened additionally or exclusively in the luminaire.

In one embodiment, only some of the terminals are designed to be live. Since the LED module replaces several bulbs, it is not necessarily dependent on the power supply of each bulb. Thus, it is sufficient if the power is supplied via only one connection. Alternatively, one terminal may represent a positive pole of a DC voltage, and the other terminal the negative pole of a DC voltage.

In one embodiment, each terminal has two pin contacts which are inserted into a corresponding socket of the lamp. This allows ordinary fluorescent tubes to be replaced by the LED module.

Advantageously, the connections are arranged at two opposite end sides in the longitudinal direction of the LED module in each case at the same height and at the same distance from the center in the width direction of the LED module.

In one embodiment, the terminals are rotatable with respect to the LED module to allow attachment of the terminals in the sockets of the luminaire. That is, after inserting the LED module into the luminaire, the rotatable connection is rotated automatically or by manual action, thereby fixing the LED module.

In order to avoid a wrong insertion of the LED module in a simple manner, or to allow arranging the LED module in both directions within the lamp, at least one terminal of the LED module is associated with a rectifier device, in particular with associated safety circuit. By the rectifier device ensures that a wrong insertion of the LED module is not possible, since both directions of insertion are possible due to the rectification.

The safety circuit can in this context, for example, prevent too high voltage spikes or the like.

Advantageously, rectifier devices and safety circuits may be encapsulated.

In order to be able to assign the corresponding connections or pin contacts to the LED modules in a simple manner, pin housings for providing the terminals and in particular the pin contacts can be arranged at the ends of the LED modules.

In one embodiment, the LED module is designed to be used with its terminals in a total of four sockets, thereby replacing two parallel arranged, double-capped fluorescent lamps. The arrangement of two parallel fluorescent lamps is common in many lights, whereby such an LED module can be used in many ways. In addition, such an LED module is easy to use, since only at the same time the four ports must be inserted into corresponding socket, which allows easy installation.

Advantageously, the LED module is characterized in that it can be used in the correct orientation in the lamp. This can be achieved, for example, by indicating the correct orientation with an arrow or a marker. On the other hand, however, it is also possible to provide a geometric limiting element, for example in the form of a projection, which prevents a wrong insertion of the LED module.

The LED module may include an electronic ballast to power the LEDs. Ordinary bulbs are often powered by AC power either provided directly by the power grid, such as incandescent bulbs, or provided by a ballast, such as fluorescent tubes. For the supply of LEDs but it requires a relatively constant DC. Thus, an electronic pre-circuit can be provided in the LED module, which adjusts the provided electrical supply so that it can be operated with LEDs. Thus, the LED module can be used directly in a luminaire, which actually provides inappropriate voltage for LED elements. In particular, the electronic ballast can convert a supply voltage of an electronic ballast for fluorescent lamps into a suitable DC power supply for the LED module.

Advantageously, the electronic ballast is designed to provide a supply voltage in the correct polarity for the LEDs, regardless of the orientation in which the LED module is inserted into the lamp. This is particularly necessary for applications in which the supply voltage has already been converted to DC voltage, and the electronic ballast in the LED module merely ensures a further adaptation or securing of the current flow in the appropriate direction for the LEDs. In particular, this can be achieved by the provision of a diode.

The present invention further relates to a luminaire having an above-described LED module according to the invention, wherein the luminaire and / or the LED module are explosion-proof. An explosion-proof LED module can be achieved in particular by a suitable encapsulation of the LEDs and possibly provided electronic ballast, so that neither a spark can be generated, nor an ignition temperature can be achieved, which would ignite an explosive gas, the LED module possibly surrounds. Alternatively or additionally, the lamp itself may be explosion-proof. This can be achieved in particular by the fact that the lamp has a cover and a base body, both of which serve to enclose the LED module so that explosive gas can not penetrate to the LED module, and further that the electrical supply and the electrical connections of the Luminaire are also designed explosion-proof.

In particular, the luminaire and / or the LED module can be designed in the type of protection Ex-e, Ex-d or Ex-m.

In one embodiment, the lamp includes a base body with sockets for conventional lamps, in which the LED module is inserted, and a transparent or translucent cover, which is mounted on the base body and covers the LED module. The cover allows distribution of the light, preferably in cooperation with a reflector of the main body or the LED module. Furthermore, the cover provides access to the replacement of the LED module by another LED module or by conventional bulbs, such as fluorescent tubes.

Advantageously, several LEDs are arranged in series in the longitudinal direction of the LED module. In this case, at least two parallel rows of LEDs in the longitudinal direction of the LED module may be provided, with more width of the LED module more than two parallel rows of LEDs may be provided, in particular more than three, more than five or more than ten parallel Rows of LEDs.

Several LEDs may be arranged longitudinally on a printed circuit board in the LED module. This allows for easier provision and easier control of multiple LEDs.

Advantageously, the LEDs in the LED module radiate at least partially in the direction of a reflector, which reflects and scatters the light of the LEDs, so that the light field of the lamp is uniformly formed. The reflector may be part of the luminaire or part of the LED module.

The object according to the invention can also be achieved by providing a luminaire which, on the one hand, has bases for conventional luminous means, such as fluorescent tubes or incandescent lamps, and, on the other hand, at least one base for an LED module which is used as a replacement for the conventional luminous means ,

In particular, the base for the conventional lamps can be equipped with no or another ballast, as the ballast, which is intended to operate the LED module.

In another embodiment, the LED module may have an electronic ballast, so that the base of the conventional bulbs and the base of the LED module can be operated with the same electrical supply.

In particular, the pedestals for the plurality of conventional bulbs and the at least one pedestal for the LED module are arranged so that the LED module, after replacement of the conventional bulbs, at least partially replaced in the area of each Conventional light source is arranged. In order to hold the LED module in a safe manner in the lamp, the corresponding base of the lamp may have a locking device for locking the terminals or pin contacts used in the base. Such locking device is for example a rotary lock, a latching mechanism or the like.

In the following, an advantageous embodiment of the invention will be explained in more detail with reference to the figures shown in the accompanying drawings.

Figur 1

eine schematische isometrische Ansicht einer Leuchte mit zwei Leuchtstoffröhren und mit abgenommener Abdeckung nach dem Stand der Technik;

Figur 2

eine schematische isometrische Ansicht einer Leuchte mit einem erfindungsgemäßen LED-Modul und mit abgenommener Abdeckung;

Figur 3

eine schematische isometrische Ansicht einer Leuchte und ein dafür vorgesehenes erfindungsgemäßes LED-Modul im Vergleich zu konventionellen Leuchtstoffröhren, und

Figur 4

eine Prinzipskizze eines LED-Moduls mit Gleichrichtereinrichtung.

Show it:

FIG. 1

a schematic isometric view of a lamp with two fluorescent tubes and with removed cover according to the prior art;

FIG. 2

a schematic isometric view of a lamp with an LED module according to the invention and with the cover removed;

FIG. 3

a schematic isometric view of a lamp and an inventive LED module provided in comparison with conventional fluorescent tubes, and

FIG. 4

a schematic diagram of an LED module with rectifier device.

In FIG. 1 a conventional explosion-proof lamp 1 is shown, which has a base body 2, which is provided in operation with a transparent or translucent cover, which is not shown. The base body 2 has explosion-proof electrical supply connections 3, 4, to which corresponding supply lines can be connected. In the main body 2, a not separately shown electronic pilot control is provided which provides a supply voltage which is suitable at least for the operation of the fluorescent tubes 5.

Two fluorescent tubes 5 are arranged in parallel in the longitudinal direction L of the base body 2. In order to fix and fix the fluorescent tubes 5 are provided in the region of the two longitudinal ends of the base body 2 downwardly projecting mounting flanges 6 and 7. On each of the mounting flanges 6, 7, two pedestals are provided, which are each aligned in the direction of the center in the longitudinal direction of the lamp 1. In this case, the term socket by no means refers only to a protruding element for receiving the ends of the fluorescent tubes 5, but also to recessed areas in which the terminals 8 (see FIG. 3 ) of the fluorescent tube 5 can be used.

The luminaire 1 has a greater length in the longitudinal direction L than height in the height direction H and width in the width direction B.

In FIG. 2 an explosion-proof lamp 1 is shown without cover with the same basic body 2, which is, however, provided instead of fluorescent tubes 5 with an LED module 9. The LED module 9 has a length which corresponds approximately to the length of the fluorescent tubes 5, wherein in particular the terminals 10, 13 and 11, 12 have the same distance as the terminals 8 of the fluorescent tube. The LED module 9 advantageously has a height which is slightly higher than the diameter of the fluorescent tube 5, and a width such that at least the terminals 10, 11 on one end side of the LED module in the base for the connections of the fluorescent tubes in Mounting flange 6, 7 of the main body 2 can be used.

Within the LED module 9, a plurality of LEDs 14 are arranged on a printed circuit board 15 in the longitudinal direction. In the present embodiment, only the LEDs on a circuit board in FIG. 2 visible, on the other side in the width direction B further LEDs are arranged symmetrically thereto. In addition, a further LED row can be arranged between the two above-described LED rows.

The LEDs 14 are supplied with a DC voltage, which is advantageously generated by an electronic ballast, which is provided in the LED module 9. As a result, the LED module 9 can be inserted into the main body 2 of a conventional luminaire 1, which provides a supply voltage for a fluorescent tube by means of an electronic ballast.

The LEDs 14 are largely upwardly and to the side surrounded by a reflector 16 or more reflectors 16, which direct the light in the direction of the opening of the base body 2 down and continue to scatter the light generated selectively by the LEDs 14. This can be achieved with the LED module 9, a similar light distribution as conventional fluorescent tubes 5.

In FIG. 3 is again a lamp 1, which has a base body 2, wherein on the base body 2, a cover 17 is arranged. When this cover 17 is removed from the base body 2, either the illustrated LED module 9 or the fluorescent tubes 5 can be inserted into the base body 2 before the cover 17 is closed again. This can be changed at any time, the type of light bulb of the lamp 1, without requiring a modification in the body 2 of the Lamp 1 must be performed. This is particularly advantageous for use in explosion-proof lights 1, since these would require a replacement of a pilot control device in the main body 2 or the like, a new certification or safety inspection, which would be expensive and expensive to perform in the field of application of the lamp 1 in an industrial environment. In addition, the LED module 9 can be designed so that it is suitable for existing luminaires 1 for replacing the fluorescent tubes 5. Thus, already installed in the industrial sector lights 1 can be upgraded, so that they have LEDs instead of fluorescent tubes as lighting.

In new designs of the base body 2 fastening mechanisms can be additionally provided, which fasten the LED module 9 in addition to the terminals 10, 11, 12, 13 in the base body 2. Furthermore, in the case of newly designed basic bodies 2, it is also possible to provide a pilot control device which is suitable both for the operation of fluorescent tubes and LEDs, so that no additional electronic pilot control must be provided in the LED module 9.

The terminals 10, 11 are provided on the end side 18 in the longitudinal direction of the LED module 9, the terminals 12, 13 on the opposite end side 19 in the longitudinal direction. The terminals 10, 11, 12, 13 each have two pin contacts 20, 20, as shown for terminal 10, which essentially correspond in their geometry and spacing to the pin contacts 21, 21 of a fluorescent tube 5. The pin contacts 20, 20 of the LED module are only partially used to power the LEDs, the other pin contacts can also be provided only for mounting the LED module 9.

FIG. 4 shows a schematic diagram of an LED module 9, in which essentially the two circuit boards with LEDs 14, see also FIG. 2 , are arranged parallel to each other. At one end of each board is a plus pole and at the other end a minus pole. At the ends of the LED module pin housing 22, 23 are arranged, which hold the corresponding terminals 10, 11, 12, 13 and associated pin contacts. Between the terminals and the respective circuit boards 9 rectifier means 24 and 25 are arranged at least at one end of the LED module. These preferably contain a safety circuit.

Through the rectifier devices is also a reverse insertion of the LED module in the corresponding sockets of the lamp, see FIG. 2 , possible without damaging the LEDs due to incorrect voltage polarities. That is, through the Rectifier devices 24, 25 ensures that the respective positive pole of the respective printed circuit board with LEDs receives a positive voltage and the corresponding negative pole receives a negative voltage.

According to the invention, an LED module is thus proposed, which can completely replace existing fluorescent lamp solutions without wiring, mechanics, see, for example, socket and socket, the corresponding lamp must be changed. To control the corresponding LEDs while the electrical or electronic ballast of the lamp is used. By additional facilities of the LED module, there is also the possibility that the module can also be used rotated by 180 ° in the lamp and can also be operated in this position. That is, there is a non-directional operation both electrically and mechanically.

As a rule, one LED module replaces two standard fluorescent lamps.

It is also possible that, for example, a plurality of printed circuit boards with LEDs are arranged one behind the other, also in a corresponding additional parallel arrangement, so that, for example, each two printed circuit boards with LEDs in series and parallel to each other in an LED module can be arranged. This also applies analogously to more than two printed circuit boards.

Claims (16)

1. LED module (9) for setting into a light (1), wherein the LED module (9) comprises a plurality of LEDs (14) and has connectors (10, 11, 12, 13) which can be set in the socket of the light (1) in place of at least one conventional light-emitting means (5),
   characterised in that
   the LED module (9) has at least two connectors (10, 11, 12, 13), wherein respectively one of the two connectors (10, 11, 12, 13) can be set in one socket of the light (1) for a light-emitting means (5) and the other of the two connectors (10, 11, 12, 13) can at the same time be set in another socket of the light (1) for a further light-emitting means (5) such that the LED module (9) replaces two separate light-emitting means (5), wherein the LED module (9) comprises an electronic upstream connection in order to supply the LEDs (14),
   wherein the light (1) and the LED module (9) are designed to be explosion-proof.
2. LED module according to claim 1, wherein the connectors can be set into sockets for fluorescent lights (5) and/or at least two connectors (10, 11) are provided at one side of the LED module (9), and in each case at least two corresponding connectors (12, 13) are provided at the opposite side of the LED module (9).
3. LED module according to any of the preceding claims, wherein the LED module (9) has a greater length than height and breadth, and wherein the connectors (10, 11, 12, 13) are provided on the end sides (18, 19) in longitudinal direction.
4. LED module according to any of the preceding claims, wherein the connectors (10, 11, 12, 13) serve to fix the LED module (9) in the light (1) and/or only some of the connectors (10, 11, 12, 13) are designed to be current-conducting.
5. LED module according to any of the preceding claims, wherein each connector (10, 11, 12, 13) has two pin contacts, which can be set into a corresponding socket of the light (1).
6. LED module according to any of the preceding claims, wherein the connectors (10, 11, 12, 13) are disposed on two opposing end sides (18, 19) in longitudinal direction of the LED module (9) in each case at the same height and at the same distance to the centre in breadth direction of the LED module (9).
7. LED module according to any of the preceding claims, wherein the connectors (10, 11, 12, 13) are rotatable with respect to the LED module (9), in order to allow a fastening of the connectors in (10, 11, 12, 13) the sockets of the light.
8. LED module according to any of the preceding claims, wherein the LED module (9) is designed to be set with its connectors into in total four sockets, in order thereby to replace two fluorescent lights (9) which are disposed in parallel manner and socketed on two sides.
9. LED module according to any of the preceding claims, wherein the LED module (9) is characterised such that it can be set in the correct orientation into the light (1).
10. LED module according to any of the preceding claims, wherein in particular the electronic upstream connection is configured to provide a supply voltage in the correct polarity for the LEDs (14), independently of in which orientation the LED module (9) is set into the light.
11. LED module according to any of the preceding claims, wherein a rectifier device (24, 25), in particular with safety switch, is assigned to at least one connector (10, 11, 12, 13).
12. LED module according to any of the preceding claims, wherein at the ends of the LED module (9) are disposed pin housings (22, 23) having connectors (10, 11, 12, 13) and in particular pin contacts (20).
13. Light with LED module (9) according to claim 12, wherein each socket has an interlocking device for interlocking the connectors (10, 11, 12, 13) set in the socket and in particular for interlocking the pin contacts.
14. Light with LED module (9) according to one of the preceding claims, wherein the LED module (9) for replacing a light-emitting means is supported rotatably relatively to the sockets between a release position and an interlock position.
15. Light with LED module (9) according to any of the preceding claims, wherein the LED module (9) has interlocking devices assigned to its connectors (10, 11, 12, 13).
16. Light with LED module (9) according to any of the preceding claims, wherein an insertion channel for inserting the connectors of the LED module and a detent or interlocking device is assigned to each socket or each mounting of the light.

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