DE102015203215A1 - Lamp with translucent piston tube - Google Patents

Abstract

A lamp (1) has a translucent piston tube (3), at least one carrier plate (2) accommodated in the piston tube (3), on the front side (4) of which at least one light source (5) is arranged and a partially inside on the piston tube (3 ), longitudinally open, translucent film (9), in particular diffuser film, with two longitudinal edges, which film (9) the front side (4) of the support plate (2) overarching, wherein the film (9) on the support plate (2 ) resiliently supported. The invention is for example applicable to retrofit lamps with at least one semiconductor light source, in particular for replacement of tubular lamps such as fluorescent lamps, fluorescent tubes, line lamps, etc.

Description

The invention relates to a lamp, comprising a translucent piston tube, at least one housed in the piston tube carrier plate, at least a light source is disposed on the front and a partially inside on the piston tube fitting, longitudinally open film with two longitudinal edges, which foil overarching the front side of the carrier board , The invention is for example applicable to retrofit lamps with at least one semiconductor light source, in particular for replacement of tubular lamps such as fluorescent lamps, fluorescent tubes, line lamps, flashlights, etc.

WO 2014/135357 A1 discloses a lighting device comprising: a lamp tube having two open ends, an alternator or "light engine" mounted in the lamp tube, a generator supporting the alternator, and two end caps for closing the open ends, the lighting device further comprising a diffuser having the diffuser Alternator bearing carrier is held on the diffuser and the diffuser is held on an inner wall of the lamp tube. The diffuser may be elastic and abut against the inner wall of the lamp tube by an internal stress, wherein the internal stress is generated by rolling up the diffuser and acts to restore the diffuser to a flat state. In this case, it is disadvantageous that the lighting device is comparatively complicated and can only be usefully used with comparatively stiff and therefore strongly rebounding diffusers.

It is the object of the present invention to at least partially overcome the disadvantages of the prior art, and in particular to provide an improved possibility of applying a thin diffuser to an inner side of a piston tube of a tubular lamp.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by a lamp, comprising a translucent tube (hereinafter also referred to as "piston tube"), at least one accommodated in the piston tube carrier board, at the first flat side (hereinafter referred to without limitation of generality as "front") at least one Light source is arranged and a partially inside on the piston tube fitting, longitudinally open, translucent film with two longitudinal edges, which foil arched over the front side of the carrier board, wherein the film is elastically resiliently supported on the carrier board.

This lamp provides the advantage that no adhesive is required for attachment of the film (but in principle may be used). There are - for example, in contrast to the WO 2014/135357 A1 - No additional parts for fixing the film or the carrier board required. It is also a particularly cost-effective, quick and easy installation possible. In addition, a precise alignment of the film on the position of the at least one light source can be achieved. In addition, the film can be reliably applied over the entire length of the piston tube on the inside. Due to the elastically resilient support, the film can be pressed against the inside of the piston tube and / or the film can press the carrier plate to the piston tube.

The piston tube has in particular a hollow cylindrical basic shape with, for example, an annular cross-sectional shape and may be open on at least one end face. The piston tube may be closed at its at least one open end by means of a respective end cap. The end cap may allow a mechanical support and possibly also an electrical connection with a matching socket. In the end cap, a driver may be accommodated for operating the at least one light source, in particular, if this end cap is also designed for electrical connection to the appropriate version. If the piston tube is open at both ends and covered there by a respective end cap, the two end caps may be identical or different. Thus, an end cap may be formed only for a mechanical support, while the other end cap is designed for a mechanical support and an electrical contact. The end cap (s) may be at least externally conforming to a conventional socket, in particular to a pin header such as a bipin socket, e.g. Type G5 or G13. or represent such a pedestal. The end cap (s) may also be referred to as pedestals or lamp sockets.

The piston tube may correspond to a conventional T-type, for example a type T2, T4, T5, T8, T10 or T12. The piston tube may be completely or partially translucent, in particular transparent. The piston tube is formed in particular as a profile body and may have at its end-side end portions a curl for easier attachment of an end cap.

It is an embodiment that the piston tube is made of glass, in particular of transparent glass. It may alternatively consist of plastic.

The carrier board provided with the at least one light source may also be referred to as a "light module" or "light engine". The second flat side facing away from the front side (hereinafter referred to as "backside" without restricting generality) may not have a light source or be provided with at least one light source.

The carrier board may be shaped band-shaped or profile-like. The support plate may have at least approximately a length corresponding to the length of the piston tube. It may be in one piece or segmented.

At least at the front, several light sources may be arranged in series, e.g. equidistant. Such a band-shaped carrier board with at least one row of light sources may also be referred to as a "light band". At least one end cap may be electrically connected to the carrier board. The carrier board may also comprise at least one electrical and / or electronic component, e.g. can represent a driver or part of it.

The at least one light source may be at least one semiconductor source. In particular, the at least one semiconductor light source comprises at least one light-emitting diode. 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). The light emitted by the at least one light-emitting diode can also be 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 located remotely from the light emitting diode ("remote phosphor"), e.g. also in the foil. The at least one light-emitting diode can be in the form of at least one individually housed light-emitting diode or in the form of at least one LED chip. 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.

In the event that the at least one light source is at least one LED, the light band may also be referred to as "LED band". LED tapes are available with rigid or mechanically flexible support board, e.g. as part of the LINEARlight or LINEARlight FLEX product family from Osram or as part of the PrevaLED linear or PrevaLED Flex product family from Osram.

It is a particularly in the case that at least one light source is at least one semiconductor source, advantageous embodiment that the lamp is a retrofit lamp. A retrofit lamp or replacement lamp is understood in particular to mean a lamp for replacing a conventional lamp. The retrofit lamp may have at least about a shape factor of the conventional lamp and also fit into corresponding lamp sockets. The retrofit lamp may in particular be designed to replace tubular lamps such as fluorescent lamps, fluorescent tubes, line lamps, flashlights, etc.

The film is elastically flexible and may have a rectangular shape in a rolled or flat state. The longitudinally open configuration causes the film in the region of the carrier board has a continuous longitudinal gap, arranged in the region of the carrier board. The longitudinal gap is limited by the longitudinal edges of the film. The film extends in particular over the entire length of the piston tube or until a curling of the piston tube. The film has, for example, a thickness or thickness between 0.075 mm and 0.5 mm, in particular of about 0.1 mm.

The film may in particular have a light-scattering property and then also be referred to as a "diffuser film". It may additionally or alternatively also have at least one other function, e.g. at least partially serve as an organic solar cell or as a carrier for at least one organic solar cell.

The film consists in particular of plastic. The film may be so stiff that it unrolls automatically after rolling around a longitudinal axis, in particular automatically returns to a flat state. Alternatively, the film may be so thin that it does not roll off automatically after a roll-up.

The fact that the film is resiliently supported on the support plate may include that the film and support plate used in the piston tube are in an elastically yielding adhesion, in particular at a pressure from the outside to the film. The elastically resilient support may by an elastically yielding embodiment of at least one portion or portion (without limitation of the generality also referred to as "spring range" or "spring portion") of Slide and / or the carrier board and / or be implemented by an interposition of at least one elastically deformable intermediate element. The elastically yielding configuration of the film and / or the carrier board may be achieved by at least one elastically yielding section, namely the spring section, viewed in cross-section. The spring sections may in particular result from a noticeable deviation from a basic shape, for example from an annular basic shape in the case of the film.

It is an embodiment that the carrier board is held directly by the piston tube. Thus, a particularly simple embodiment with few components is obtained. In particular, can be dispensed with a special carrier for the carrier board. The carrier board may e.g. with two longitudinal edges (for example, at a transition from the back to a respective longitudinal side) directly on the inside of the piston tube. The piston tube does not need to be specially designed or adapted. Fixation of the front ends of the driver board may then be e.g. be achieved by the at least one cap, for example by the driver board is inserted into the end cap. It is a development that the piston tube (in particular a piston tube made of glass) has local inwardly directed projections, for example notches, which can hold the carrier plate, in particular on the underside.

Generally, gaps and / or cavities between the driver board and the piston tube may be filled with a thermally conductive material to achieve improved heat dissipation from the driver board. The thermally conductive material may be e.g. TIM material and / or may be one or more - e.g. as a heat sink (s) or heat sink serving - metal body. The at least one metal body may e.g. Made of aluminum. The thermally conductive material may, in particular, be located in a gap between the rear side of the driver board and a portion of the piston tube opposite the rear side.

It is also an embodiment that the film is attached or fixed to the carrier board, e.g. non-positively via a clamping connection and / or form-fitting via a detachable or non-releasable latching connection.

It is still an embodiment that the film is inserted with its longitudinal edges in a respective slot in the carrier board and starting from the slot has a transition region which is not applied to the piston tube. The transition region may have (in cross-section) along one of the films at least one inflection point. Advantageously, the transition region causes the film to flex inwardly into the piston tube at an internal stress acting (e.g., generated by an external force application) in the circumferential direction of the film and so compress the film inwardly to a significant degree. This in turn facilitates a reduction of the cross section for easy insertion of the already inserted into the carrier board foil with the carrier board in the piston tube. If the external force is no longer applied, the transition region can spring back, so that the diameter of the film expands again and this securely rests on the inside of the piston tube. The presence of the inflection point may also be implemented by an inward bulge.

The slot serves in particular as a stop for the longitudinal edges of the film, which, for example, generally contact a bottom of the slot. The introduced into the respective slot areas of the film may generally be kept loose there or - for improved handling especially outside the piston tube - be trapped there.

The slots can be introduced continuously in the longitudinal direction (for example, in the manner of a longitudinal groove), so that the longitudinal edges of the diffuser film, which in the slots 8th be plugged, can be formed in a straight line. Alternatively, the slots may have a limited or "local" extent in the longitudinal direction (and thus be short) and the longitudinal edges of the diffuser film may each be provided with at least one corresponding mating projection which can be inserted into an associated (short) slot. In the case of short slots, one or more slots may be present on each side (ie, left or right).

The fact that the transition region has at least one inflection point in the cross section along the film comprises, in particular, that a direction of curvature changes there when the film travels in the cross section. In an extreme case, the inflection point at the transition from the transition region (corresponding in cross section to a transition section) may be to the region or section adjacent to the piston tube, e.g. in the form of a bend.

It is a further embodiment that the film is inserted with its longitudinal edges in a respective slot of the carrier board, the carrier board is elastically bendable by the film and the carrier board rests with its back partially on the piston tube, but lifted below the respective slot of the piston tube is. The carrier board is thus bendable by means of the film. Press the film over the slots on the carrier board, press they the support plate in the direction of the piston tube, whereby the film presses less on the piston tube or even can lift off from the piston tube, so that the film or the combination of foil and carrier board can be easily inserted into the piston tube.

It is yet another embodiment that the slots are made in the front of the carrier board. This allows a simple insertion of the film, in particular, even if the carrier board is flat or not curved and thus adjacent with their side surfaces of the piston tube or this even contacted with the side surfaces.

It is also an embodiment that the slots are introduced in a respective longitudinal side of the carrier board. This releases space on the top, e.g. for printed conductors. In addition, a slot depth may be greater with lateral introduction. This embodiment can be used particularly advantageously if the carrier board is bent against the piston tube, ie the longitudinal sides point upwards or obliquely upwards.

It is also an embodiment that the carrier board is at least partially curved in the direction of a portion of the piston tube, which is covered by the carrier board. Thereby, a longitudinal side of the carrier board can be made more accessible and / or it can rest for improved heat dissipation from the light sources, a back of the carrier board on the glass bulb.

It is also an embodiment that the carrier board has a flat front and a conformed on the piston tube rear. Thus, a large bearing surface of the back can be achieved on the glass bulb with a correspondingly effective heat transfer to the glass bulb without bending the carrier board.

It is also an embodiment that longitudinal edges or longitudinal edge regions of the carrier board and the film are cut complementary to each other and interlocked. The longitudinal edges may e.g. be rectangular cut. The sprain may be loose or jammed. Due to the Verscherung a particularly simple implementable attachment, in particular a mutual stop, of carrier board and film is achieved, especially in a flexible carrier board.

It is also an embodiment that at least the film, starting from its respective sheared longitudinal edge or longitudinal edge region, has a transition region which does not rest on the piston tube. This transition region may have, in particular, at least one point of inflection along a circumferential direction of the film and, therefore, like the transition region described above, can be used as an elastically rebounding region in order to re-expand a compressed film. However, the transition region need not have an elastically deformable spring region, e.g. if the carrier board has a raised transition area starting from its sheared edge area.

The sheared longitudinal edge or longitudinal edge region of the film and / or the carrier plate may abut against the piston tube at the edge or be spaced therefrom.

It is also an embodiment that the film - in particular at least with its longitudinal edges - each supported on at least one elastically deformable body and the at least one elastically deformable body rests on the support plate and is fixed or fixed there. This makes it possible to dispense with an adaptation of the film and the carrier film. The elastically deformable body may e.g. a rubber body or a foam body, e.g. at least one foam cube or at least one foam strip.

It is also an embodiment that on a front side of the carrier board (at which there is also at least one light source) a plurality of rigid connecting elements are present, in which the diffuser film is insertable. Due to the rigidity of the connecting elements, the spring force of the diffuser film can be transferred virtually lossless to the carrier board, so that it can be effectively pressed onto the glass envelope for a low thermal contact resistance, in particular if the carrier board rests with its rear side conforming to an inside of the glass envelope.

The carrier board itself does not need to have any slots. The carrier board is preferably curved so that its rear side rests practically on the entire surface of the inside of the piston tube. A front side of the carrier board is then advantageously correspondingly curved.

In particular, one or more rigid connecting elements are present in each case on the front side on both sides next to the light sources, into which the transition regions of the diffuser foil can be inserted. For the introduction of the diffuser film, the connecting elements advantageously have respective lateral receptacles, eg. In the form of slots. The diffuser film is thus supported on the connecting elements. The lateral arrangement of the receptacles has the advantage that the diffuser film does not need to be strongly curved in order to be introduced therein.

The connecting elements can be soldered, glued, latched, etc., for example, on the carrier board. The connecting elements can be equipped. For example, they can be SMT elements.

The connecting elements may, for example, be elongated elements parallel to the longitudinal axis L, e.g. in the manner of a bar or rail. In one variant, exactly one connecting element may be present on each side of the carrier board. The connecting elements may alternatively or additionally be arranged in the form of a plurality of elements aligned in a row parallel to the longitudinal axis.

The above-described characteristics, features, and advantages of this invention, as well as the manner in which they will be achieved, will become clearer and more clearly understood in connection with the following schematic description of exemplary embodiments which will be described in detail in conjunction with the drawings. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.

1A shows a cross-sectional view through a lamp according to a first embodiment with a first carrier board;

1B shows a cross-sectional view of a second carrier board;

1C shows a cross-sectional view of a third carrier board;

2A shows a cross-sectional view through a lamp according to a second embodiment with a fourth carrier board;

2 B shows a cross-sectional view of a fifth carrier board;

3 shows a cross-sectional view through a lamp according to a third embodiment with a sixth carrier board;

4 shows a cross-sectional view through a lamp according to a fourth embodiment with a seventh carrier board;

5 shows a cross-sectional view through a lamp according to a fifth embodiment with a eighth carrier board; and

6 shows a cross-sectional view through a lamp according to a sixth embodiment with a ninth carrier board.

1A shows a cross-sectional view through a LED retrofit lamp 1 according to a first embodiment with a band-shaped, rigid support plate 2 , The carrier board 2 is in a hollow cylindrical, transparent glass bulb 3 (dashed lines) located off-center. The LED retrofit lamp 1 has a longitudinal axis L, which with the longitudinal axis of the glass bulb 3 matches. A longitudinal axis (not shown) of the carrier board 2 is parallel to the longitudinal axis L.

On one of the longitudinal axis L facing upper or front 4 is the carrier board 2 in the direction of the longitudinal axis L with a plurality of light sources arranged in series in the form of LED chips 5 stocked, of which only one LED chip 5 is shown. The LED chips 5 like to emit white light. The carrier board 2 lies with longitudinal edges of a back 6 directly on the inside of the piston tube 3 up and is held by this.

In the front 4 the carrier board 2 are in the vicinity of a respective side surface 7 laterally slanted slots 8th introduced into which a translucent and light-diffusing diffuser film 9 made of plastic, eg in a tight fit. The diffuser film 9 Thus, it is open on the longitudinal side and has two longitudinal edges, via whose associated edge regions it is attached directly to the carrier board (ie, without intermediate elements). The diffuser film 9 vaulted the front 4 the carrier board 2 ,

The slots 8th can be introduced continuously in the longitudinal direction, so that the longitudinal edges of the diffuser film 9 which are in the slots 8th be plugged, can be formed in a straight line. Alternatively, like the slots 8th longitudinally have a limited or "local" extent and the longitudinal edges of the diffuser film 9 be provided with at least one corresponding mating projection in an associated slot 8th can be plugged. In the case of isolated slots 8th can have one or more slots on each side (ie, left or right) 8th to be available.

The diffuser film 9 indicates starting from the in the slots 8th the respective transitional area 10 on, not on the piston tube 3 is present, but in an adjacent area 11 the diffuser film 9 passes, the inside of the piston tube 3 is applied. The transition area 10 points along a circumferential direction or in cross section along the diffuser film 9 a turning point 12 on, at which a course of a curvature of the diffuser film 9 their direction changes. This is the transition area 10 elastically resilient, so that the diffuser film 9 on the carrier board 2 can support elastically resilient. Of the Transition area 10 So it serves as a spring area or spring section.

Will the diffuser film 9 (eg for insertion into the piston tube 3 ) outside the transition area 10 or to the adjoining area 11 depressed to reduce its cross-section (as indicated by arrows F), an at least approximately circumferential pressure is applied to the transition regions 10 exercised, thereby further bending inward or dent. Is the external force applied to the diffuser film 9 canceled (eg after insertion into the piston tube 3 ), the transition areas relax 10 again elastic and thereby firstly press the diffuser film 9 with her area 11 to the piston tube 3 and also the carrier board 2 against the piston tube 3 , This will be a safe investment of the area 11 and the carrier board 2 on the piston tube 3 reached.

1B shows a cross-sectional view of a second carrier board 13 , for example, instead of the first carrier board 2 in the LED retrofit lamp 1 can be installed. While the carrier board 2 a rectangular cross-sectional shape with to the front 4 and the back 6 vertical side surfaces 7 has, the carrier board 13 bottom bevelled side surfaces 14 on, with which they flat or flat on the piston tube 3 can rest. As a result, a heat transfer and a support safety are improved.

At the first carrier board 2 and the second carrier board 13 can be a gap between the back 6 and the piston tube 3 with a good heat-conducting material (eg with a thermal conductivity λ of more than 1 W / (m · K), in particular more than 15 W / (m · K)) to be filled.

1C shows a cross-sectional view of a third carrier board 15 , for example, instead of the carrier board 2 in the LED retrofit lamp 1 can be installed. The carrier board 15 points contrary to the carrier board 2 a spherical cap-shaped cross-sectional shape with a to the piston tube 3 compliant spherical curved back 16 on. As a result, the heat transfer and the support safety can be further improved.

2A shows a cross-sectional view through a LED retrofit lamp 21 according to a second embodiment with a fourth carrier board 22 , Unlike the LED retrofit lamp 1 is the band-shaped carrier board 22 now in cross-section towards a portion of the piston tube 3 curved by the carrier board 22 is covered. It is specially curved here so that its back 23 on the inside of the piston tube 3 rests. The front 24 is curved accordingly. The slots 8th are now in a respective longitudinal side 25 the carrier board 22 brought in. This results in the contact area of the back 23 the carrier board 22 with the piston tube 3 a large-area, effective heat transfer.

2 B shows a cross-sectional view of a fifth carrier board 26 , While the long sides 25 the carrier board 22 perpendicular to the front 24 and back 23 are aligned, are long sides 27 the carrier board 26 obliquely to the front 24 and back 23 aligned, and thus upwards, for accessibility to the slots 8th to improve. The carrier board 26 For example, instead of the carrier board 22 be used.

3 shows a cross-sectional view through a lamp 31 according to a third embodiment with a sixth carrier board 32 , The carrier board 32 is similar to the carrier board 26 with a curved front 33 and back 34 formed, wherein the carrier board 32 with her backside 34 partly on the piston tube 3 rests, but below the respective slot 8th from the piston tube 8th is lifted off. Here are strip-shaped lateral areas 35 the back 34 lifted off, while a middle strip-shaped area below the LED chips 5 rests.

The carrier board 32 may here be flexible and thus easily elastically deformable, by means of the diffuser film 9 , Will the diffuser film 9 - eg as in 1 shown - pressed from the outside, it can apply a force to the carrier board 32 exercise, which is sufficient to the carrier board 32 to bend, in the direction of a smaller curvature. This in turn allows the diffuser film 9 assume a smaller diameter and simply into the piston tube 3 be inserted. If the external force is released, the carrier board springs 32 back and presses the diffuser film 9 against the piston tube 3 , In this embodiment, the transition area likes 10 as shown a turning point 12 (and thus continue to bend or bulge under external force). Alternatively like the transition area 10 not be dented inwards or no turning point 12 exhibit. In the latter case, the spring effect or elastic restoring force alone on the carrier board 32 provided.

4 shows a cross-sectional view through a lamp 41 according to a fourth embodiment with a seventh carrier board 42 , Here are from the long sides 43 the carrier board 42 outgoing longitudinal edge areas 44 as well as longitudinal edges 45 (or corresponding longitudinal edge regions) of a diffuser film 46 cut complementary to each other (eg with regular rectangular recesses) and interlocked or interlocked used. This form the carrier board 42 and the diffuser film 46 each other a stop. The longitudinal edge areas 44 the carrier board 42 are from the piston tube 3 lifted off and go into each of the piston tube 3 off transition areas 10 above.

Because the longitudinal edge areas 44 the carrier board 42 with their long sides 43 on the piston tube 3 rest, a bend of the edge areas 44 prevented. However, the longitudinal edge areas like 44 not on the piston tube either 3 rest, leaving the side areas 46 the carrier board 42 they can be elastically bendable.

At a compression of the diffuser film 45 - for example, as in 1 shown - the ones of the sheared longitudinal edges 45 the diffuser film 46 outgoing transition areas 10 dent inward analogously as described above, especially since they have at least one turning point 12 exhibit.

5 shows a cross-sectional view through a lamp 51 according to a fifth embodiment with an eighth carrier board 52 , The carrier board 52 is similar to the carrier board 13 formed, but has no slots. Rather, they are now on the front 4 on both sides next to the LED chips 5 one or more soft-elastic body or spring elements present, here: foam body 53 , The diffuser film 9 is supported in particular with the longitudinal edges of their transition areas 10 now from the foam bodies 53 from. Due to the elasticity of the foam body 53 however, also likes the provision of transition areas 10 be waived.

6 shows a cross-sectional view through a lamp 61 according to a sixth embodiment with a ninth carrier board 62 , The carrier board 62 is similar to the carrier board 22 formed, but has no slots. The carrier board 62 is so curved that its back 63 virtually full surface on the inside of the glass bulb 3 rests. A front side 64 the carrier board 62 is curved accordingly.

Rather, they are now on the front 64 on both sides next to the LED chips 5 one or more rigid connecting elements 65 present in the transition areas 10 the diffuser film 9 are insertable. The connecting elements 65 have to insert the diffuser film 9 each lateral shots, here in the form of slots 66 , on. The diffuser film 9 so relies on the fasteners 65 from. Due to the rigidity of the fasteners 65 becomes the spring force of the diffuser film 9 virtually lossless on the carrier board 62 transferred, so this for a low thermal contact resistance with its back 63 effectively on the glass bulb 3 is pressed. The lateral arrangement of the slots 66 has the advantage that the diffuser film 9 does not need to be heavily curved in order to be introduced into it.

The connecting elements 65 For example, on the carrier board 62 be soldered, glued, snapped on etc. The connecting elements 65 For example, they can be equipped. For example, they can be SMT elements.

The connecting elements 65 For example, parallel to the longitudinal axis L may be elongated elements, for example in the manner of a bar or rail. In a variant like on each side of the carrier board 62 exactly one connecting element 65 to be available. The connecting elements 65 may alternatively or additionally be arranged in the form of several parallel to the longitudinal axis L aligned in series elements.

The carrier board 62 May be flexible or rigid.

Although the invention has been further illustrated and described in detail by the illustrated embodiments, the invention is not so limited and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Thus, in general, instead of the two-sided (left- and right-side) transition regions, a transition region may also be present on only one side and the film on the other side may be present, for example. completely or almost completely resting on the inside of the piston tube.

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.

LIST OF REFERENCE NUMBERS

1

 LED retrofit lamp

2

 First carrier board

3

 flask

4

 front

5

 LED chip

6

 back

7

 side surface

8th

 slot

9

 diffuser film

10

 Transition area

11

 Area

12

 turning point

13

 Second carrier board

14

 side surface

15

 Third carrier board

16

 back

21

 LED retrofit lamp

22

 Fourth carrier board

23

 back

24

 front

25

 long side

26

 Fifth carrier board

27

 long side

31

 lamp

32

 Sixth carrier board

33

 front

34

 back

35

 Side area

41

 lamp

42

 Seventh carrier board

43

 long side

44

 Longitudinal edge area

45

 Longitudinal edge of the diffuser film

46

 diffuser film

51

 lamp

52

 Eighth carrier board

53

 foam body

61

 lamp

62

 Ninth carrier board

63

 back

64

 front

65

 connecting element

66

 slot

F

 arrow

L

 longitudinal axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2014/135357 A1 [0002, 0006]

Claims (15)

Lamp ( 1 ; 21 ; 31 ; 41 ; 51 ; 61 ), comprising - a translucent piston tube ( 3 ), - at least one in the piston tube ( 3 ) accommodated carrier board ( 2 ; 13 ; 15 ; 22 ; 26 ; 32 ; 42 ; 52 ; 62 ), at the front ( 4 ; 24 ; 33 ; 64 ) at least one light source ( 5 ) is arranged and - a partially inside of the piston tube ( 3 ) adjoining, longitudinally open, translucent film ( 9 ; 46 ), in particular diffuser film, with two longitudinal edges, which film ( 9 ; 46 ) the front ( 4 ; 24 ; 33 ) of the carrier board ( 2 ; 13 ; 15 ; 22 ; 26 ; 32 ; 42 ; 52 ; 62 ), wherein - the film ( 9 ; 46 ) on the carrier board ( 2 ; 13 ; 15 ; 22 ; 26 ; 32 ; 42 ; 52 ; 62 ) resiliently supported. Lamp ( 1 ; 21 ; 31 ; 41 ; 51 ; 61 ) according to claim 1, wherein the carrier board ( 2 ; 13 ; 15 ; 22 ; 26 ; 32 ; 42 ; 52 ; 62 ) directly through the piston tube ( 3 ) is held. Lamp ( 1 ; 21 ; 31 ; 41 ) according to one of claims 1 or 2, wherein the film ( 9 ) on the carrier board ( 2 ; 13 ; 15 ; 22 ; 26 ; 32 ; 42 ) is attached. Lamp ( 1 ; 21 ; 31 ) according to claim 3, wherein the film ( 9 ) - with their longitudinal edges in a respective slot ( 8th ) in the carrier board ( 2 ; 13 ; 15 ; 22 ; 26 ) and - starting from the slot ( 8th ) a transitional area ( 10 ), which is not on the piston tube ( 3 ), - which transitional area ( 10 ) along a circumferential direction of the film ( 9 ) at least one turning point ( 12 ) having. Lamp ( 31 ) according to claim 3, wherein - the film ( 9 ) with their longitudinal edges in a respective slot ( 8th ) of the carrier board ( 32 ), - the carrier board ( 32 ) through the film ( 9 ) is elastically bendable and - the carrier board ( 32 ) with its back ( 34 ) partially on the piston tube ( 3 ) but below ( 35 ) of the respective slot ( 8th ) of the piston tube ( 3 ) is lifted off. Lamp ( 1 ) according to one of claims 4 to 5, wherein the slots ( 8th ) in the front ( 4 ) of the carrier board ( 2 ; 13 ; 15 ) are introduced. Lamp ( 21 ; 31 ) according to one of claims 4 to 5, wherein the slots ( 8th ) in a respective longitudinal side ( 25 ; 27 ) of the carrier board ( 22 ; 26 ; 32 ) are introduced. Lamp ( 21 ; 31 ; 61 ) according to one of the preceding claims, wherein the carrier board ( 22 ; 32 ; 62 ) at least partially in the direction of a portion of the piston tube ( 3 ) curved through the carrier board ( 22 ; 32 ; 62 ) is covered. Lamp ( 1 ) according to one of claims 1 to 7, wherein the carrier board ( 15 ) a flat front side ( 4 ) and one conforming to the piston tube ( 3 ) rear side ( 16 ) having. Lamp ( 41 ) according to claim 3, wherein longitudinal edge regions ( 44 ) of the carrier board ( 42 ) and longitudinal edges ( 45 ) of the film ( 46 ) are cut complementary to each other and interlocked. Lamp ( 41 ) according to claim 10, wherein the film ( 46 ) and / or the carrier board ( 42 ) starting from their respective sheared longitudinal margins ( 44 ) or longitudinal edges ( 45 ) a respective transitional area ( 10 ), which is not on the piston tube ( 3 ) is present. Lamp ( 51 ) according to one of claims 1 or 2, wherein - the film ( 9 ) each on at least one elastically deformable body ( 53 ) is supported and - the at least one elastically deformable body ( 53 ) on the carrier board ( 52 ) rest. Lamp ( 61 ) according to one of claims 1 or 2, wherein on a front side ( 64 ) of the carrier board ( 62 ) several rigid connecting elements ( 65 ) in which the diffuser film ( 9 ) is insertable. Lamp ( 1 ; 21 ; 31 ; 41 ; 51 ; 61 ) according to one of the preceding claims, wherein the piston tube ( 3 ) consists of glass. Lamp ( 1 ; 21 ; 31 ; 41 ; 51 ; 61 ) according to one of the preceding claims, wherein the lamp ( 1 ; 21 ; 31 ; 41 ; 51 ; 61 ) a retrofit lamp with at least one semiconductor light source ( 5 ).

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