EP3271650A1

EP3271650A1 - Semiconductor lamp

Info

Publication number: EP3271650A1
Application number: EP16705132.5A
Authority: EP
Inventors: Bernhard Rieder; Shaozhu YANG
Original assignee: Ledvance GmbH
Current assignee: Ledvance GmbH
Priority date: 2015-03-19
Filing date: 2016-02-17
Publication date: 2018-01-24
Anticipated expiration: 2036-02-17
Also published as: US20180112836A1; EP3271650B1; US10502370B2; CN107407478A; DE102015205030A1; WO2016146330A1

Abstract

Semiconductor lamp (1) having a straight, translucent tube (2) whose open end faces (3) can be closed by means of respective end caps (4), which end caps (4) are plug-connected to the tube (2), a circuit board (16) which is equipped with at least one semiconductor light source (17) is installed in the tube (2) and is in contact with at least one of the end caps (4), wherein both end caps (4) are mechanically connected to one another by means of a connection element (18) running in the tube (2), at least one of the end caps (4) is arranged such that it can be displaced longitudinally with play (d) with respect to the tube (2; 54) and thermal expansion of the connection element (18) in a longitudinal direction (L) of the tube (2) is smaller than thermal expansion of the tube (2) and wherein the connection element (18) is snap-fitted to at least one of the end caps (4). The invention can for example be used for retrofit or replacement lamps for conventional elongate lamps, e.g. fluorescent lamps and tube lamps.

Description

The invention relates to a semiconductor lamp, comprising a rectilinear translucent tube whose open

End surfaces can be closed by means of respective end caps, and equipped with at least one semiconductor light source circuit board, which is housed in the tube and is electrically contacted by at least one end cap. For example, the invention is applicable to retrofit or replacement lamps for conventional elongate lamps, e.g.

Fluorescent lamps and tube lamps. With respect to semiconductor lamps is often a

Plastic tube used as a piston. On the open

End faces are usually the end caps firmly

put on to prevent stripping and possibly a

Airtightness. It is disadvantageous that the plastic pipe at a temperature change in

Longitudinal direction of the tube as compared to a glass tube greatly expands (elongated or contracted), so that also changes the length of the semiconductor lamp accordingly. US 2010/0008085 A1 discloses a method of forming an LED-based light to replace a conventional one

A fluorescent lamp in a fluorescent lighting fixture, comprising: forming an elongated sheet of a highly thermally conductive material to form a heat sink. Shaping the heatsink allows the heatsink to be formed to cover and end cap attachment structures,

To define mounting surfaces for LEDs at different angles and a high surface-to-width ratio for heat dissipation.

WO 2014/001474 AI relates to a lighting device with a housing and with an accommodated in the housing electronic assembly, wherein it further at least one Side of the electronic module at least one

Has adjusting mechanism and the adjusting mechanism in

An operative connection with the electronic module is and can be actuated from outside the housing, so that the electronic assembly is kept taut in the housing.

EP 2 395 278 A2 discloses a lighting device comprising a light source unit, which in a

Longitudinally arranged light-emitting units

having. A transparent cover member, which is formed in a substantially straight pipe shape and has openings at both ends, is for receiving the

Light source unit formed in the longitudinal direction. The cover member has a higher thermal expansion coefficient than the light source unit.

End plate elements are at the two ends of

Light source unit attached and close the openings at the two ends of the cover. It is the object of the present invention to overcome the disadvantages of the prior art, at least in part, and in particular to provide a semiconductor lamp of the type in question, which undergoes little change in temperature under temperature changes and particularly simple

can be produced.

This object is achieved according to the characteristics of the independent

Claims solved. Preferred embodiments are

in particular the dependent claims.

The object is achieved by a semiconductor lamp,

comprising a rectilinear translucent tube, the open end faces of which are closable by means of respective end caps, which are fitted together with the tube, and one equipped with at least one semiconductor light source

A printed circuit board housed in the pipe and electrically contacted by at least one of the two end caps, the two end caps being connected by means of one in the pipe extending connecting element are mechanically connected to each other, at least one of the end caps relative to the tube with a clearance is arranged longitudinally displaceable and a thermal expansion of the connecting element in a

Is longitudinal direction of the tube less than a thermal expansion of the tube and wherein the connecting element is locked with at least one of the end caps.

By locking gives the advantage that the

Semiconductor lamp can be assembled by simply plugging together or a simple plug movement. To a

elaborate screwing can be dispensed with. It is also possible to dispense with the use of an adhesive, since it tends to exude into the pipe and, if necessary,

cause damage to light-generating or electronic components. In addition, a locking connection can be implemented by comparatively easy to manufacture components.

The attachment of the end caps on the connecting element with simultaneous longitudinal displacement of the tube relative to at least one of the end caps also has the advantage that a thermal change in length of the semiconductor lamp is determined by the change in length of the connecting element and not by the change in length of the tube. Since the thermal expansion of the connecting element in a longitudinal direction of the tube is less than the thermal expansion of the tube, this change in length is less than in a fixedly attached to the end caps tube. The tube may be longitudinally displaceable with respect to both end caps or may be longitudinally displaceable with respect to only one of the end caps.

The translucent tube may be a transparent and / or a diffused tube. In particular, the tube may have a hollow cylindrical basic shape with e.g. a circular

Have cross-sectional shape. The tube may also be referred to as a tubular piston, tube piston or piston tube. The end caps can also be used as sockets, end pieces or

Closures are called or serve. In particular, both end caps serve for fastening the semiconductor lamp in a corresponding socket. In one variant, only one of the end caps can also serve for an electrical contact. Alternatively, both end caps also one

serve electrical contact. To the electric

Contacting can be provided, for example, electrically conductive contact pins, e.g. for bipin connections.

A driver for converting electrical signals input via at least one end cap into operating signals for operating the at least one semiconductor source may be accommodated in at least one of the end caps. Of the

Driver may be arranged only in an end cap, be split on both end caps and / or at least partially disposed on the equipped with the at least one semiconductor light source circuit board. The driver or part of it likes one or more on its own circuit board

(Driver board ") arranged driver blocks.

If an end cap has the driver or a part of the driver, the part of this end cap having the electrical contacts can also be referred to as an "end cap contact part". The end cap then has in particular the end cap contact part and the driver attached thereto.

It is a development that the connecting element is connected directly to the end cap contact part of at least one end cap. It is also a development that the connecting element with the driver (or a part thereof) is connected to at least one end cap, that is, only indirectly via this driver with the end cap contact part.

The fact that the end caps are mated with the tube may mean that the end caps (inward) into the tube

are inserted and / or that the end caps (from the outside) are attached to the pipe. The mating includes in particular, that the end caps are at least partially inserted into the tube and / or attached to the pipe.

In particular, the at least one

Semiconductor light source at least one light emitting diode. at

If several LEDs are present, they can be lit in the same color or in different colors. A color may be monochrome (e.g., red, green, blue, etc.) or multichrome (e.g., white). This can also be done by the at least one

LED emitted light is an infrared light (IR LED) or an ultraviolet light (UV LED). Several

Light emitting diodes can produce a mixed light; e.g. a white mixed light. The at least one light-emitting diode may contain at least one wavelength-converting phosphor

(Conversion LED). The phosphor may alternatively or additionally be arranged away from the light-emitting diode

("Remote Phosphor"). The at least one light-emitting diode can be in the form of at least one individually lighted LED or in the form of at least one LED chip. Several LED chips can be mounted on a common substrate ("submount"). The at least one light emitting diode may be equipped with at least one own and / or common optics for beam guidance, e.g. at least one Fresnel lens,

Collimator, and so on. Instead of or in addition to inorganic light emitting diodes, e.g. based on InGaN or AlInGaP, organic LEDs (OLEDs, for example polymer OLEDs) can generally also be used. Alternatively, the at least one semiconductor light source may be e.g. have at least one diode laser.

The printed circuit board equipped with the at least one semiconductor light source can be a flexible or rigid band-shaped one

Be printed circuit board. It can then also be referred to as a "light strip". The at least one semiconductor light source can be used, for example, as an extension direction of the

Circuit board aligned row of LEDs are present, for example of LED chips. The fact that the printed circuit board is contacted by the two end caps, comprises in particular a mechanical contact, and for at least one of the two end caps also electrical contact. The contacting can be implemented directly or indirectly (eg via a driver or a part thereof).

That at least one of the end caps is second to the pipe with a play longitudinally displaceable, may include that - at least for a given temperature range such as between -20 ° C and + 70 ° C, 0 ° C and 50 ° C, etc. - the tube in Longitudinal direction has a play or a possible displacement path with respect to at least one of the end caps,

especially opposite to both end caps.

The end cap can also be glued and / or jammed in addition to a latching with the connecting element, etc.

be. The locking can basically be solvable or insoluble (without destruction of the semiconductor lamp).

The fact that the connecting element is latched with at least one of the end caps may include that the end cap has at least one latching projection, which in at least one

Locking receptacle of the connecting element engages, and / or that the connecting element has at least one latching projection which engages in at least one latching receptacle of the end cap.

Among them, it is a particularly advantageous embodiment that the connecting element has at least one latching recess which engages with at least one latching

Locking projection of a respective end cap can be brought, as this can usually implement easier than the reverse

Arrangement. This is especially the case if that

Connecting element is flat, e.g. a metal strip is.

It is still an embodiment that the connecting element is a band-shaped, metallic connecting element. One such is particularly easy to produce and can be introduced into the tube and robust. Metal has a noticeable

lower coefficient of thermal expansion than, e.g.

Plastic, so that a smaller linear expansion than in a non-movable attachment of the tube to the

End caps is possible. For example, is the

Thermal expansion coefficient for steel at approx. = 12 · 10 ^"6 / Κ, for aluminum at approx. 24 · 10 ^{" 6} / Κ, for polycarbonate (PC) at approx. 70-10 ^"6 / K, for polyamide (PA ) at approx. 110 · 10 ^"6 / Κ, for

Polyvinyl chloride (PVC) at approx. 80-10 ^"6 / K and for

Polymethyl methacrylate (PMMA) at about 80-10 ^"6 / K.

The connecting element may e.g. an aluminum strip or a steel strip or an element made of a steel strip. The band can also be used as a profile or as a strip

be designated. The latching receptacle of the connecting element can in particular in this case a continuous

Be recessed recess, because this can be particularly easy to bring in and, in particular for thin strips a sufficient depth for engagement of a locking projection

provides.

It is another embodiment that the

Connecting element for latching with a respective one

End cap has at least one envelope area or envelope, which has a Raufaufnähme, in particular latching recess. As a result, a material reinforcement in the region of the Raufaufnahme is provided, which also allows a greater depth of Raufaufnahme for a particularly secure holding the associated locking cap. The cargo area or

Envelope is located at one or both end portions of the connecting element and is particularly simple

produced. Thus, at least two layers - eg of a metal strip - lie on top of one another at the area of the envelope, wherein the scious image is formed by introducing a recess into at least one layer. When introduced into several layers, the respective recesses are superimposed. It is an alternative or additional embodiment that the connecting element for latching with a respective end cap has at least one latching recess, to which a ramp-like inwardly projecting area (hereinafter referred to as "fuse area" without restriction of the generality) in the direction of a proximal open end face followed. This allows a sliding of the

Locking projection over the securing area in the

Latching recess extending in the plug-in direction (hereinafter also without limitation of generality direction of attachment,

Insertion direction or AufSteckrichtung called) of

End cap located behind the securing area, and provides for the slide latching projection an additional

Verrastungselement. Thus, a removal of the end cap from the tube is particularly safe prevented.

It is still an alternative or additional embodiment that the connecting element for locking with a

respective end cap has at least one latching recess, from which a material region is turned over in the direction of a proximal open end face. As a result, a material reinforcement of the connecting element is achieved, which makes it difficult to release the latching connection between the associated end cap and the connecting element.

It is a development that the circuit board rests flat on the connecting element. This can do that

Connecting element, in particular if it consists of a good thermal conductivity material such as metal, as well

Heat sink for the circuit board and thus serve for the circuit board located at least one semiconductor light source.

To produce a particularly low thermal resistance between the printed circuit board and the connecting element, the printed circuit board can be fixedly attached to the connecting element, for example glued to it, for example by means of a double-sided adhesive tape, a thermal paste, etc. Die PCB can additionally or alternatively with the

Connecting element screwed, riveted, jammed, clamped, etc. It is yet another embodiment that the circuit board rests loosely on the connecting element. This allows the circuit board and the connecting element

move against each other, so that a voltage introduction into the circuit board due to a thermal mismatch can be reduced or even prevented. These

Embodiment is particularly advantageous when the coefficients of longitudinal expansion of the printed circuit board and connecting element differ significantly. But it is also possible that the circuit board and the

Connecting element are spaced from each other, so not or at least not over a large area (but, for example, only selectively) touch. This can be a mutual

mechanical interference are particularly effectively prevented.

There is still a training that the circuit board

directly with the end cap contact part of at least one

End cap is connected. It is also a development that the circuit board with the driver (or part thereof) is connected to at least one end cap, so only indirectly via this driver with the end cap contact part.

It is also a development that the circuit board by means of an electrical plug contact with at least one

End cap (i.e., with its end cap contact portion or

Driver) is connected, wherein the plug contact against its plug contact counter element while maintaining a

electrical contact is displaceable. This is particularly advantageous if the linear expansion coefficients of printed circuit board and connecting element noticeably

differ. For example, the plug contact may be attached to the printed circuit board. The plug contact counter element For example, the driver board itself or one on the

Driver board attached plug contact counter element. The plug contact counter element may also act as a jamming. It is also an embodiment that the connecting element is integrated into the circuit board. This allows a particularly compact and easily assembled internal structure of the semiconductor lamp. For example, that may be

Connecting element have a metal strip or a metal strip, such as. has been described above, wherein at least one flat side of which at least one semiconductor light source is arranged. To the electric

Insulation against the - e.g. electrically conductive connection element may already be the underside of the at least one semiconductor light source itself (i.e.

Support surface) be electrically isolated and / or there may be an electrical insulating layer between the connecting element and the at least one semiconductor light source.

It is also an embodiment that the tube is a

Plastic pipe is. A plastic pipe is inexpensive

Can not be produced and splintered. The invention is particularly advantageously applicable to this configuration, since the plastic tube commonly used have a problematic high thermal expansion coefficient in the range from typically about 70 x 10 ^"6 / Κ. The plastic may, for example, PC, PA, PVC, PMMA have etc. It can be transparent or diffused.

It is also an embodiment that the tube is formed on the inside as a linear guide for the circuit board and / or for the connecting element. As a result, an accurate positioning of the circuit board and / or the

Connecting element in the pipe allows without a

easy insertion in longitudinal direction (eg insertion or insertion) to prevent. The linear guide prevents in particular a free movement perpendicular to the Longitudinal direction. The linear guide can serve in particular as a stop against a movement perpendicular to the longitudinal direction and thus in this direction a positive

Provide bracket.

It is also an embodiment that the tube has inwardly projecting projections, which the circuit board

Keep perpendicular to the longitudinal direction of the tube. Such a configuration is particularly easy to implement. These

Projections may be formed, for example, as rails or nubs. They may have been made in one piece with the remainder of the tube, e.g. by means of a

Injection molding process. They may alternatively have been incorporated retrospectively, e.g. by gluing or by forming the tube.

It is also an embodiment that the

Connecting element is arranged in a cavity formed between the circuit board and the pipe. As a result, the circuit board act as a cover of the cavity and the

Keep circuit board in it. This results in particular the advantage that the circuit board a bend of the

Can prevent connecting element, since it acts as a stop against it.

It is also an embodiment that the tube is equipped on the inside with a receptacle for the connecting element, which the connecting element in a

Cross direction holds form-fitting. This allows a still further improved positioning accuracy of

Connecting element.

It is also an embodiment that the

Semiconductor lamp is a replacement lamp or retrofit lamp. It assigns to it at least approximately the form factor of

replacing, conventional tubular lamps (eg of fluorescent lamps or tube lamps). In particular, it fits into the provided for the conventional lamps sockets. By way of example, the semiconductor lamp may be a retrofit lamp for replacing T-type fluorescent lamps, eg of the T5 or T8 type. The end caps then have in particular the form factor of G5 or G13 sockets, for example by the presence of two contact pins. The tube can then in particular have a diameter like the piston of the

have conventional fluorescent lamps.

The above-described characteristics, features and advantages of this invention as well as the manner in which they are achieved will become clearer and more clearly understood

In connection with the following schematic description of exemplary embodiments that are associated with the

Drawings are explained in more detail. It can to

Clarity identical or equivalent elements must be provided with the same reference numerals.

Fig.l shows a sectional view in side view a

Section of a semiconductor lamp according to a first embodiment;

2 shows a sectional view in an oblique view of a further detail of the semiconductor lamp according to the first embodiment;

3 shows an oblique view of a section of a

Connecting element of the semiconductor lamp according to the first embodiment;

4 shows the semiconductor lamp according to the first

Embodiment in cross-sectional view;

5 shows an oblique view of a section of a

Connecting element of a semiconductor lamp according to a second embodiment;

6 shows a sectional view in oblique view a

Section of the semiconductor lamp according to the second

Embodiment;

7 shows an oblique view of a section of a

Connecting element of a semiconductor lamp according to a third embodiment; 8 shows a sectional view in an oblique view

Section of the semiconductor lamp according to the third

Embodiment;

9 shows a sectional view in oblique view a

Semiconductor lamp according to a fourth

Embodiment; and

Fig. 10 shows the semiconductor lamp according to the fourth

Embodiment in cross-sectional view. Fig.l shows a sectional side view of an end portion of a semiconductor lamp 1 according to a first embodiment. 2 shows the semiconductor lamp 1 in sections as a sectional view in an oblique view. The retrofit lamp, e.g. to replace a T8

Fluorescent lamp, provided semiconductor lamp 1 has a straight translucent tube 2 with a

hollow cylindrical basic form made of transparent or opaque plastic. The tube 2 has e.g. open on both sides

End faces 3, which are closable by means of respective end caps 4.

For this purpose, the end caps 4 have an open in the direction of the tube 2 hollow cylindrical shape, so that they up to a predetermined maximum penetration depth into the tube. 2

can be inserted, for example in the manner of a plug. The maximum penetration depth is given here by a shell-side, annular outer elevation 5, for which the tube 2 serves as a stop. However, the end caps 4 should not be inserted maximally in the pipe 2 to leave a longitudinal play d in a longitudinal direction L of the pipe 2. The end caps 4 fit radially narrow or with only a small radial clearance in the tube 2. In the interior of the end cap 4 shown, a driver 6 is housed, which has a driver board 7, which is equipped with a plurality of driver blocks 8. By a tube 2 facing away from the end surface 10 of the end cap 4 lead two electrically conductive pins 11, which are electrically connected to the driver 6 (eg via a contact strip 12) and can be fed via the electrical supply signals. The driver 6 converts the electrical

Supply signals in electrical operating signals for

Semiconductor light sources in the form of e.g. of LEDs 17 um.

The driver board 7 is inserted longitudinally displaceable in an electrical plug contact 15 and contacts it electrically. The electrical plug contact 15 is connected to a

Top of a band-shaped circuit board 16 is arranged, which is also equipped with a plurality of series-arranged along the longitudinal direction L LEDs 17. The plug contact 15 is against the driver board 7 while maintaining a

displaceable electrical contact, which is particularly advantageous for the prevention of stress in the printed circuit board 16.

The printed circuit board 16 lies with its underside loosely on a band-shaped connecting element in the form of a

Steel bands 18 on. The steel strip 18 is locked at one end to the end cap 4, here with a

Contact pins 11 having end cap contact portion 19. The end cap 4 can therefore also be regarded as a system of the Endkappen- contact part 19 and the driver 6.

The latching mechanism comprises a latching projection 20 of the end cap 4 projecting outwards on the shell side, which has a bevel in an insertion direction E of the end cap 4 into the tube 2. At the side facing away from the tube 2 of the

Locking projection 20, the end cap 4 also has a introduced into the outer surface of the end cap 4 recess 21.

The steel strip 18 has a counter-locking means a

Locking recess 22 for engagement with the locking projection 20. The steel strip also has an inwardly directed

Projection in the form of an envelope 23 for placement in the recess 21. The end cap 4 shown is mechanically firmly connected via the steel band 4 with an end cap (see Fig.) Which closes the other end face of the tube 2. The connection of the two end caps 4 can be play-free in the longitudinal direction L or may have only a slight play. The two

End caps 4 can be shaped the same. Due to the

mechanically fixed connection of the two end caps. 4

with each other via the steel strip 18 and due to the

existing game d is the tube 2 in the longitudinal direction L (in and against the insertion direction E) against the end caps. 4

slidably arranged (longitudinally).

A temperature-dependent change in length of the semiconductor lamp 1 as such is essentially determined by the comparatively small change in length of the steel strip 18. Since the coefficient of longitudinal expansion of the steel of the steel strip 18 is considerably lower than that of the plastic of the pipe 2, when heated, the clearance d becomes smaller and becomes larger as it cools. Therefore, a length expansion of the tube 2 is compensated by a change of the game d. The size of the game d can be easily determined by knowing the longitudinal expansion coefficients of the steel strip 18 and the

Plastic tube 2 and the desired temperature range (e.g., from -20 ° C to 70 ° C, from 0 ° C to 50 ° C or so).

3 shows an end-side section of the

Connecting element 18. The connecting element 18 has at its end the envelope region 23, which is e.g. has been achieved by bending a flat steel strip by 180 °. Of the

Turnover area 23 has two superimposed layers 23a and 23b, in which congruent respective recesses have been introduced to form together the locking recess 22.

4 shows the semiconductor lamp 1 in cross-sectional view through the tube 2 at the level of an LED 17. The tube 2 is on the inside as a linear guide for the circuit board 16th and formed for the steel strip 18. For this purpose, the tube 2 has inwardly projecting projections 24 which hold the printed circuit board 16 perpendicular to the longitudinal direction L on the tube 2. The projections 24 may extend over a greater length or even the full length of the tube 2, or may, for example, have a plurality of longitudinally spaced L's

Projections 24 may be present.

The circuit board 16 and the tube 2 together form a cavity 25 in which the steel strip 18 is arranged. In this case, the steel strip 18 is located in a groove-like receptacle 26 and is held by the circuit board 16 therein. This has the advantage that the steel strip 18 is prevented by the circuit board 16 from bending and thereby

for example, to change its nominal length.

5 shows an oblique view of a section of a connecting element serving as a steel strip 32 a

Semiconductor lamp 31, which also has the end cap 4, the circuit board 16 and the tube 2. The steel strip 32 also has in its end region a latching recess 33 for engagement with the latching projection 20 of the end cap 4, as in FIG

shown. At the locking recess 32 closes in the direction of the open end face (here: against the insertion direction E of the end cap 4) a ramp-like inwardly upstanding

Securing area 34. The securing portion 34 is disposed in the recess 21 of the end cap 4. The latching projection 20 can when inserting the end cap 4 on the

Initiate fuse area 34 away, but is then prevented by this from sliding out.

7 shows an oblique view of a section of a connecting element serving as a steel strip 42 a

Semiconductor lamp 41. The steel strip 42 has in its

End region also has a latching recess 43 for engagement with the latching projection 20 of the end cap 4 of the semiconductor lamp 41st as shown in Fig.8. However, from the latching recess 43 now a material region 44 in the direction of a next open end face of the tube 2 (here: against the

Plug insertion E of the end cap 4) turned over. Of the

Material region 44 is arranged in the recess 21 of the end cap 4.

9 shows a sectional view in an oblique view of a section of a semiconductor lamp 51. The semiconductor lamp 51 has, in contrast to the semiconductor lamps 1, 31 and 41, a metallic connecting element which in a

Printed circuit board 52 is integrated and e.g. as a core of it can serve. For engagement with the latching projection 20, a simple latching recess 53 is now provided.

Fig. 10 shows the semiconductor lamp 51 in cross-sectional view through an LED 17. A tube 54 of the semiconductor lamp 51 is flattened at the back of the printed circuit board 52 to avoid a gap between a back of the printed circuit board 52 and the tube 54 to provide improved heat transfer from the circuit board 52 to allow the tube 54.

The semiconductor lamps 1, 31, 41 and 51 shown in the embodiments can be assembled particularly easily by the circuit board and the (possibly in it

integrated) metal band are inserted into the tube and then at least one end cap is inserted into the tube. Through the insertion process, the end cap

advantageously latched with the metal strip and plugged into the electrical plug contact of the circuit board. The other end cap can be placed analogously or already connected to it before inserting the printed circuit board and the metal strip into the tube. Although the invention is shown in detail by the

Embodiments has been illustrated and described in detail, the invention is not limited thereto and others Variations may be deduced therefrom by those skilled in the art without departing from the scope of the invention.

Thus, instead of the metal strip, e.g. also a - in particular band-shaped - glass connecting element,

PCB material (such as FR4, CEM1, etc.) or ceramic are used. In particular, the connecting element itself may be a printed circuit board main body, in particular without a metallization.

Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

Also, a number may include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded.

Reference sign

1 semiconductor lamp

2 pipe

3 face

4 end cap

5 Outer elevation

6 drivers

7 driver board

8 driver block

10 face

11 contact pin

12 contact strips

15 plug contact

16 circuit board

17 LED

18 steel band

19 end cap contact part

20 rest stop

21 return

22 locking recess

23 handling area

23a Location of the envelope area 23

23b Position of the envelope area 23 24 projection

25 cavity

26 Slot-like recording

31 semiconductor lamp

32 steel band

33 latching recess

34 hedging area

41 semiconductor lamp

42 steel strip

43 latching recess

44 material area

51 semiconductor lamps

52 PCB

53 locking recess pipe

longitudinal game

insertion

longitudinal direction

Claims

Semiconductor lamp (1; 31; 41; 51), comprising

- a straight translucent tube (2; 54),

its open end faces

(3) can be closed by means of respective end caps (4), which end caps (4) are plugged together with the tube (2; 54), and

- A circuit board (16; 52) equipped with at least one semiconductor light source (17), which is housed in the tube (2) and of at least one of the

End caps (4) are contacted,

where

- the two end caps (4) are mechanically connected to one another by means of a connecting element (18; 32; 42; 52) running in the tube (2; 54),

- at least one of the end caps (4) is arranged to be longitudinally displaceable relative to the tube (2; 54) with a clearance (d) and

- Thermal expansion of the connecting element (18; 32;

42; 52) in a longitudinal direction (L) of the tube (2; 54) is less than a thermal expansion of the tube (2; 54) and

where

- The connecting element (18; 32; 42; 52) is locked with at least one of the end caps (4).

Semiconductor lamp (1; 31; 41; 51) according to claim 1, in which the connecting element (18; 32; 42; 52) has at least one latching recess (22; 33; 43; 53) which engages in a latching manner with a latching projection (20 ) of a respective end cap (4) can be brought.

Semiconductor lamp (1; 31; 41; 51) according to one of

preceding claims, in which the connecting element (18; 32; 42; 52) is a band-shaped, metallic one

connecting element.

4. Semiconductor lamp (1) according to claim 3, in which the

Connecting element (18) for locking with a

respective end cap (4) at least one

Envelope area (23) which has a locking recess (22).

5. Semiconductor lamp (31) according to one of claims 3 to 4, in which the connecting element (32) for locking with a respective end cap (4) has at least one

Has a locking recess (33), which is followed by a securing area (34) which protrudes inwards in a ramp-like manner in the direction of a next open end face.

6. Semiconductor lamp (41) according to one of claims 3 to 5, in which the connecting element (42) for locking with a respective end cap (4) has at least one

Has a locking recess (43) from which a

Material area (44) is folded towards a next open end face.

7. Semiconductor lamp (1; 31; 41) according to one of the

preceding claims, in which the circuit board (16) rests loosely on the connecting element (18; 32; 42).

8. Semiconductor lamp (51) according to one of claims 1 to 6, in which the connecting element is integrated into the circuit board (52).

9. Semiconductor lamp (1; 31; 41; 51) according to one of the

preceding claims, in which the tube (2; 54) is a plastic tube.

10. Semiconductor lamp (1; 31; 41; 51) according to one of the

preceding claims, in which the tube (2; 54) is used on the inside as a linear guide (24, 26; 24) for the circuit board (16; 52) and/or for the

Connecting element (18; 32; 42; 52) is formed. Semiconductor lamp (1; 31; 41; 51) according to claim 10, in which the tube (2; 54) has inwardly projecting projections (24) which attach the circuit board (16; 52) to the tube (16; 52) perpendicular to the longitudinal direction (L). 2) hold.

Semiconductor lamp (1; 31; 41) according to claim 11, wherein the connecting element (18; 32; 42) is formed in one between the circuit board (16) and the tube (2).

Cavity (25) is arranged.

Semiconductor lamp (1; 31; 41) according to one of

preceding claims, in which the tube (2; 54) has a receptacle (26) on the inside for the

Connecting element (18; 32; 42) is equipped, which holds the connecting element (18; 32; 42) in a form-fitting manner in a transverse direction.

Semiconductor lamp according to one of the preceding claims, in which the circuit board (16; 52) is formed by means of a

electrical plug contact (15) is electrically connected to at least one end cap (4), the

Plug contact (15) can be moved against its plug contact counter element (7) while maintaining electrical contact

Semiconductor lamp (1; 31; 41; 51) according to one of

preceding claims, in which the semiconductor lamp (1; 31; 41; 51) is a retrofit lamp.