DE102007030186B4 - Linear LED lamp and lighting system with the same - Google Patents

Linear LED lamp and lighting system with the same

Info

Publication number
DE102007030186B4
DE102007030186B4 DE102007030186A DE102007030186A DE102007030186B4 DE 102007030186 B4 DE102007030186 B4 DE 102007030186B4 DE 102007030186 A DE102007030186 A DE 102007030186A DE 102007030186 A DE102007030186 A DE 102007030186A DE 102007030186 B4 DE102007030186 B4 DE 102007030186B4
Authority
DE
Germany
Prior art keywords
reflector
lamp unit
light
according
lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE102007030186A
Other languages
German (de)
Other versions
DE102007030186A1 (en
Inventor
Harald Hofmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siteco Beleuchtungstechnik GmbH
Original Assignee
Harald Hofmann
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harald Hofmann filed Critical Harald Hofmann
Priority to DE102007030186A priority Critical patent/DE102007030186B4/en
Publication of DE102007030186A1 publication Critical patent/DE102007030186A1/en
Application granted granted Critical
Publication of DE102007030186B4 publication Critical patent/DE102007030186B4/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68Details of reflectors forming part of the light source
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00Lighting devices or systems using a string or strip of light sources
    • F21S4/20Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/51Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • F21V5/02Refractors for light sources of prismatic shape
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/0008Reflectors for light sources providing for indirect lighting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/005Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00Protecting lighting devices from damage
    • F21V15/01Housings, e.g. material or assembling of housing parts
    • F21V15/015Devices for covering joints between adjacent lighting devices; End coverings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/101Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/02Wall, ceiling, or floor bases; Fixing pendants or arms to the bases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00Arrangement of electric circuit elements in or on lighting devices
    • F21V23/06Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • F21V7/06Optical design with parabolic curvature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • F21V7/08Optical design with elliptical curvature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00Planar light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

Lamp unit (10) with
A reflector (12) having a reflector wall whose boundary defines an exit region (16),
- And a linear light source unit (30) having at least one LED light source (24) which is arranged in the exit region (16) at a distance in front of the reflector wall so that it emits light in the direction of the reflector,
In which a heat sink (20) is provided on the light source unit (30) and protrudes from the outlet region (16),
- wherein the outlet region (16) is closed by a transmitting termination (18), so that a closed reflector space is formed,
- wherein the reflector (12), the termination (18), the light source unit (26) and the heat sink (20) are permanently connected to each other,
- And wherein on the outside of the lamp unit (10) on a front side of the reflector (12) a detachable electrical connection (27) for supplying electrical power to the light source unit (30) is provided.

Description

  • The The invention relates to a lamp unit and a lighting system with a recording for the changeable attachment of a lamp unit.
  • Under a lamp or lamp unit is understood to mean a product an electric light source with further electrical, optical and mechanical elements connected to an inseparable unit is. Such a lamp is always interchangeable only as a whole Recording on a lamp determines.
  • In the WO2005 / 085706 A1 is an LED lamp described with a base for connection to a lamp and a curved rotationally symmetric reflector, in the focal point for generating a directed light distribution, an LED source is arranged. The reflector opening forms a light exit plane of the lamp. The LED light source is arranged in the light exit plane. The light exit plane is closed by a transparent termination. A cooling block is arranged on the side facing away from the reflector of the LED light source and extends in the main emission direction, so that it protrudes from the light exit plane.
  • In the FR 2 831 647 A1 is described an automobile signal light. A reflector is formed by a housing having an inner reflective surface. The exit region of the reflector is closed by a transparent disc, wherein the disc and the housing are fastened by a clip connection. A mounting strip for LED modules is formed in the middle of the pane, which is plugged in and electrically contacted there. The LED modules are arranged in a row in the longitudinal direction of the signal light and aligned in the direction of the reflector.
  • The DE 103 45 567 A1 discloses a reflector lamp. A reflector is disposed adjacent to an LED located behind a shield. The light surface of the LED emits light onto the reflector surface which extends between an outer free edge of the reflector surface and a straight edge of the shield. The reflector has the shape of an ellipse section or parabolic section.
  • The DE 103 11 072 A1 shows a vehicle lamp with LED light sources, which are arranged along a line. The LED light sources are directed towards the back of the luminaire in the direction of the reflector, so that their light is reflected by the reflector.
  • The DE 101 05 622 A1 describes a lighting device that receives in a housing a control unit, a reflector and a PCB equipped with LEDs. The LEDs on the circuit board are arranged so that their light radiation takes place in the direction of the reflector and is discharged from there through a transparent end plate to the outside. In one embodiment, the end plate has a rectangular contour.
  • The EP 1 357 335 A2 describes a lighting device with a moving mechanism for changing the light emission direction. In one embodiment, the device comprises a light-emitting unit having a plurality of linearly arranged LEDs, which are arranged opposite a reflector. An annular heat pipe (heat pipe) extends from the reflector to the light-emitting unit, so as to transfer the heat generated there while serving as a suspension.
  • The WO 2007/054889 A2 shows a long-field louvered, are introduced in the subdividing slats LED elements.
  • The WO 01/59359 A1 shows a light-emitting diode arrangement in which with respect to a rotationally symmetrical concave reflector, a lighting unit is arranged with a plurality of controllable LEDs.
  • In the US 2004/0252502 A1 an assembly with LEDs and a reflector is described. On an elongated support LEDs are mounted, which emit light in the direction of the reflector. In the carrier made of a thermally conductive polymer material runs a heat pipe (heat pipe).
  • The US 2004/0114366 A1 describes a lighting device with a reflector of substantially rectangular base, in which a circuit board can be mounted with a series of LEDs that emit light in the direction of the reflector. In order to reduce the shading by the circuit board, the reflector surface is interrupted in the central region by a second surface, which consists of symmetrical, oppositely arranged reflector surfaces. On the back of the circuit board, a heat sink is arranged.
  • The US 2004/0001344 A1 shows a lighting system with a concave reflector and a field of LEDs arranged opposite to this on a flexible curved circuit board, which is mounted on an aluminum heat sink. In the heat sink coolant lines can be provided.
  • It Object of the invention, a lamp unit and a lighting system therefor to propose, with a high light output and high light intensity can be achieved are.
  • These Task is solved by a lamp unit according to claim 1 and a lighting system therefor according to claim 22. Addicts claims refer to advantageous embodiments of the invention.
  • In the lamp unit according to the invention, a linear light source unit is provided which differs from punctiform light sources, such as. In the WO2005 / 085706 A1 differs in that the light emission is distributed over a linear range. Such a linear light source unit with at least one LED light source can on the one hand be formed by a single LED element (eg LED chip) of linear shape, for example by an elongated OLED, but preferably a plurality of LED light sources are arranged in a row , In the following, when referring to a "longitudinal direction", this refers to the longitudinal direction of the linear light source unit.
  • The Light source unit is at a distance in front of the reflector wall of a Reflectors arranged so that they Light, preferably the entire Lichstrom in the direction of the reflector wall radiates from where the light reflects to the light exit area becomes. It is in contrast to conventional arrangements of light sources and reflectors, such as are commercially available, for example, as halogen reflector lamps, arranged in the light exit area. The main beam direction of Light source unit is thus preferably opposite to the main radiation direction the lamp unit. The reflector wall is preferably closed, d. H. especially in the central region, to which the main radiation direction the LED light source unit is directed, without interruption. So can one possible comprehensive reflection and thus efficient utilization of the generated Light can be achieved.
  • While such a relative arrangement of LED light source and reflector already out of the WO2005 / 085706 A1 is known, results in the inventive solution, the advantage that a significantly higher lamp power used by the linear light source unit and thus a greater light output can be achieved. Namely, along the longitudinal direction, a large number of high-power LEDs can be arranged.
  • Corresponding is also the light intensity distribution a lamp unit according to the invention in contrast to known rotationally symmetrical lamps, preferred essentially 2-axis symmetrical (i.e., both longitudinal and vertical) also to the transverse axis) and can be so for diverse Use lighting purposes, for example. Flooding, grazing light illumination etc. in areas such as facades, walls, floors, etc.
  • Of the Reflector is preferably cylindrical, d. H. with in the longitudinal direction formed substantially the same cross-section. Especially preferred it has essentially the shape of a longitudinally halved hollow cylinder with a preferably symmetrical cross-sectional shape. The shape of the reflector surface is chosen to achieve optical properties, for example as a parabola, ellipse etc. In this case, the parabolic focal point or one of the ellipse focal points is preferred arranged at the location of the light source unit. The reflector wall is preferably arched, especially preferred with constant curvature. It can alternatively but also, for example, have prismatic shapes and other structures.
  • Of the The exit area of the reflector is the area from which the light emerges the lamp unit emerges. Preferably, the area is substantially just, for example. As formed between parallel longitudinal edges of the reflector Level. The exit area is preferably rectangular, especially preferably oblong, d. H. its extension in the longitudinal direction is larger, preferred much larger (eg. more than 2 times, or even more than 5 times) than the extension in the transverse direction.
  • At the Exit area is provided a termination, so that a closed Reflector space is formed. The termination is transmissive to the passage of light and may be formed, for example, transparent or translucent. Of the Completion of the Reflector space is preferably complete, so that the lamp overall dustproof and particularly preferably even airtight is completed. In airtight Conclusion can a gas filling, for example, with over- or negative pressure may be provided in the interior of the reflector space, if this for the operation of the LED light source unit (eg for cooling, electrical insulation etc.) is advantageous.
  • The Lamp is not dismountable as a lamp unit and has in the interior no parts to be changed. The reflector, the conclusion and the Light source unit are insoluble connected with each other. The lamp unit is for interchangeable use provided in a luminaire, in which they always as a complete unit used and replaced as needed.
  • A cooling of the light source unit is needed for LED light sources in order to operate them in a low-cost work area. For this purpose, a heat sink is provided on the LED element. Such a heat sink is, for example. From a good would be meleitenden material, eg. Metal, preferably aluminum. The surface of the heat sink is preferably enlarged, for example by lamellae and / or structured surface. The heat sink expedient, as well as the LED light source unit, elongated shape. He is with the best possible heat transfer as close as possible to attach directly to the LED light source elements or to their support. According to the invention, the heat sink protrudes from the lamp unit from the exit area so as to allow effective dissipation of heat into the environment. For this purpose, it may be provided that the heat sink projects in the direction of the light emission. If the heat sink in this case of substantially the same width as the carrier of the light source unit, this results in no additional shading. The heat sink can be accessible from the outside, for example. Be designed as a handle. Preferably, it has a profile shape over the length of the same cross-section.
  • According to the outside of the Lamp unit an electrical connection for the electrical supply the LED light sources provided. The connection is detachable, d. H. when installing the Lamp in a lighting unit, the electrical connection can easily produced and easily removed when removing. Preferably, the electrical connection is provided as a plug connection, terminal connection or screw connection. According to the invention Arrangement of the connection on a front side of the reflector, d. H. at one of the ends of the lamp. In this case is preferred the front a passage for the electrical contacting of the LED light source unit arranged in the interior intended.
  • to lamp unit according to the invention a number of developments of the invention are provided. So For example, the LED light source unit may be a common carrier for a number from linear, d. H. longitudinal LED light sources arranged one behind the other exhibit. All are preferred LED light sources arranged on a common carrier. The carrier preferably comprises also electrical conductors for the electrical supply of the light sources. More preferably, he can electrical components for electrical supply and driving the LED light sources. The carrier can be designed as a board, preferably a board material to choose is that for efficient heat distribution a good thermal conductivity having.
  • In From a mechanical point of view, it is preferable to have a detachable mechanical connection for attachment to be provided in a luminaire. The mechanical connection and the electrical connection can through a common element are formed, as for example, from the screw base conventional light bulbs or socket commercially available Halogen lamps is known. Preferably, the mechanical termination comprises a protruding one Connecting tongue, the eg. one for have a screw, clamp or locking connection suitable hole can.
  • Especially preferred are electrical and mechanical connection to at least provided an end face of the reflector. For this there can be one end plate with a mechanical connection and be provided an electrical connection. The end plate is preferably also insoluble connected to the rest of the lamp unit. It can be provided that on both end faces of the reflector in each case a mechanical connection, eg. in the form of a connection tongue is provided, but only on one side of an electrical connection.
  • According to one Development of the invention are to influence the light distribution in the longitudinal plane Slats provided transversely to the longitudinal direction of the light source unit are arranged. With the help of slats is a control or determination the light emission angle in the lamp longitudinal direction possible. The Slats can as simple, flat lamellae or as more complex curved forms be educated.
  • On the one hand an arrangement of fins at the exit area is possible. The Slats can be parallel side by side, for example, within the unit, d. H. arranged behind the conclusion be. Likewise she on the outside the unit, d. H. be integrated before the conclusion. alternative is also an integration of lamellar, opaque or reflective Separations in the conclusion possible.
  • alternative or in addition this is also possible to arrange the slats on the light source unit. Includes the light source unit several light sources, so can the slats are placed between them. In this way is an alignment of the radiation already at the place of light generation possible. It is particularly preferred that the between the light sources arranged lamellas are formed with a reflective surface. So can a determination of the light exit angle in the longitudinal planes nevertheless high efficiency and at the same time optimal utilization of the light generated by the light source unit.
  • Other developments of the invention relate to influencing the light distribution by an optical element at the exit region. Thus, a flat, transmitting optical element with a structured, ie not completely planar surface for deflecting the light reflecting from the reflector can be provided. As a result, the light distribution in the transverse plane is preferred in addition to the affected by the reflector contour distribution. In this case, the optical element can, for example, increase the emission angle of the light. Particularly preferably, the lamp termination directly forms the optical element, ie no separate optical element is provided, but the termination is formed by the optical element, or the transmitting termination has a desired optical function. It is possible to form the optical element as a linear profile, so that the element, for example. Has a constant in the longitudinal direction of the cross section. For example. For example, the element may be provided with a prismatic structure for obtaining a broadened emission.
  • In In a further development of the invention, the reflector is shaped in such a way that that this Light of the light source unit in a focal point in front of the distance bundled the light exit area becomes. Such bundling can be achieved by a reflector with elliptical contour, at the light source unit is arranged in the first focal point, so that the light is focused in the second focus at a distance in front of the light exit area. The light distribution achieved in this way is suitable for a large number of uses particularly interesting, because in the second focal axis of the entire Luminous flux of the lamp is concentrated in a linear range. If, for example, a narrow slot is arranged in this focal plane, so the lamp emits essentially all the light through it narrow slot through. As a result, on the one hand the lamp of the opposite Side not to see, which is extremely interesting Applications in lighting allows. In technical terms This gives the advantage that in the focal plane, the light the lamp is provided, but due to the distance through electrical power loss during light generation generated heat there does not take effect.
  • For the effective cooling can be a cooling medium be provided. Therefor can the heat sink a cavity for receiving the cooling medium exhibit. The cooling medium is preferably fluid, d. H. liquid or gaseous. The cavity inside the heat sink can be completed, with a heat transfer after the heat pipe principle by evaporation of the cooling medium hottest and precipitation coldest Point is achieved. Alternatively, the cavity can also be flowed through. For this can the heat sink on at least one of the end faces have a connection for the cooling medium. During installation in a corresponding light, the connection with a feeder be coupled to the lamp, so that an effective cooling in particular through flow of the heat sink in longitudinal direction allows becomes.
  • The Attachment of the heat sink takes place preferably in the exit region at its conclusion. Here can be provided that the Finish one longitudinal extending gap leaves in the arranged as a profile heatsink arranged is.
  • at the described arrangement of the light source unit at the exit area with Hauptabstrahlrichtung towards the reflector it comes, for example. in a parabolic or ellipsoidal reflector whose area in the central region substantially at right angles to the main emission direction of the LED light source element stands, to a certain shade of light emission. These Shading can occur with suitable (namely relatively broad) radiation the LED light source element and a suitable narrow shape be minimized so that they are acceptable for many applications is. But to a better utilization of the directly in Hauptabstrahlrichtung To achieve radiated light can be provided that the reflector surface in the the light source unit directly opposite area a shape having a central elevation, so that from the light source unit incident light in one direction past the light source unit is reflected. For a reflector with symmetrical cross-section this is, for example, the middle region in the plane of symmetry to which the central optical axis of the light source unit shows. Here can the rest Area as described, for example. Parabolic shaped reflector have a different shape with a middle elevation, eg. an involute shape.
  • A described lamp unit is preferably of handy size, so that they easily manually in appropriate lighting units can be used. Further preferred are sizes, like she for commercial Lamps conventional Kind common are. Thus, for example, the outlet region may have a length of 5-150 cm, preferably are 10-60 cm. The exit area can also have a width of 2.5-20 cm, preferably about 5-10 cm.
  • In a luminaire system according to the invention according to claim 22, a lamp unit may be used as described above. A corresponding lamp includes a housing and an electrical connection as well a recording for the changeable attachment of the lamp unit. The recording allows a mechanical fixation and electrical contacting of the lamp unit. One corresponding mechanical connection is with a suitable connection of the lamp unit connected. Likewise, a corresponding electrical contact with the contact terminal of Lamp unit connected.
  • A corresponding lamp is provided in contrast to the pure lamp unit to the fact that the actual light-generating element - namely the Lamp unit - it is interchangeable. Further, the lamp may include additional components, such as, for example, electrical supply and control devices, including for connection to a mains voltage. Next switching elements, dimmers, etc. may be provided on the lamp.
  • In In a particular embodiment, an ellipse-shaped reflector lamp described above is used. Here, the lamp has a slot-shaped Lichtaustrittsbe rich on, which lies in the second focal axis of the lamp. To this Way can the case the lamp almost completely - namely until on the slot-shaped, prefers especially narrow light exit area - closed be, while still the full luminous flux can be emitted to the outside.
  • following Become embodiments of the Invention described in more detail with reference to drawings. In the drawings demonstrate:
  • 1a . 1b perspective views of an embodiment of a lamp unit;
  • 2 Side view, front view and top view of the lamp unit 1a . 1b ;
  • 3 . 3a Cross-sectional views of the plane A of the lamp off 2 as an assembled unit and in an exploded view;
  • 4 a longitudinal sectional view of the plane C of the lamp 2 ;
  • 5 an exploded perspective view of the front side of the lamp unit 1a . 1b ;
  • 6 in a perspective view of a first embodiment of a closure plate of the lamp unit 5 ;
  • 7 a longitudinal sectional view of the B level 2 ;
  • 8th a backside view of the lamp 1a . 1b ;
  • 9a in a perspective view a second embodiment of a closure plate;
  • 9b a cross-sectional view of the plane C from 2 with the end plate off 9a ;
  • 10a in perspective view a third embodiment of a closure plate;
  • 10b a longitudinal sectional view of the plane B from 2 with the end plate off 10a ;
  • 11a in cross-sectional view (plane A), a first embodiment of a reflector shape as a parabolic reflector;
  • 11b as a light distribution curve, an intensity distribution of the radiation of the lamp 11a ;
  • 12a in cross-sectional view (plane A), a second embodiment of a reflector shape as an ellipse with the focal plane F1 and F2;
  • 12b in perspective cross-sectional view of an arrangement of a lamp
  • 12a in front of a slot-shaped light exit area;
  • 13 in partial cross-sectional view (plane A) and longitudinal sectional view (plane C) an embodiment of a lamp with fins at the exit region;
  • 14 in partial cross-sectional view (plane A) an embodiment of a lamp with fins on the light source unit;
  • 15 . 16 in partial longitudinal sectional view (plane B) embodiments of lamellae between the LED light sources;
  • 17a . 17b Cross-sectional view, top view of a termination plate and light distribution curve of a lamp with a first embodiment of a transmitting termination;
  • 18a . 18b Cross-sectional view, top view of a termination plate and light distribution curve of a lamp with a second embodiment of a transmitting termination;
  • 19a . 19b Cross-sectional view, top view of a closure plate and light distribution curve of a lamp with a third embodiment of a transmitting termination;
  • 20a a cross-sectional view of a lamp with a formed in a partial region as involute reflector;
  • 20b an enlarged view of the involute area 20a ;
  • 21a a cross-sectional view of another embodiment of a lamp with a quarter-circle-shaped reflector;
  • 21b a light distribution curve of the lamp 21a and
  • 22 in a schematic longitudinal sectional view of a lamp with a lamp according to 1a . 1b ,
  • In 1a . 1b . 2 is a lamp in different views 10 shown. The lamp has a cylindrical reflector 12 made of glass, on both end sides by end plates 14 is completed. Alternatively, the reflector may also be made of other materials, for example plastic or metal. The reflector 12 has a symmetrical cross-section with the domed side facing the back of the lamp. The shape of the curvature, as explained below, for example, be parabolic or elliptical. The figures show the reflector shape in this regard only schematically. At the front of the reflector 12 is between its longitudinal edges a rectangular light exit area 16 formed by a transparent glass pane 18 is closed. Alternatively, the conclusion 18 be formed by another material, for example. Plastic, as long as it is light transmissive.
  • About the length of the lamp 10 runs at the bottom of a heat sink 20 , The heat sink 20 stands at the light exit area 16 in the light exit direction. It is designed as a profile body with several parallel slats made of good heat conducting material, aluminum in the example shown.
  • The lamp 10 is designed as a linear lamp with an elongated light exit area. In the example shown, the width of the light exit area is about 5 cm. The length is relatively short in the example shown for illustrative reasons. For such lamps lengths of 10, 30, 60 and 100 cm (light exit area) are sought.
  • In 3 - 5 are details from inside the lamp 10 to recognize. The reflector 12 has on the inner side a highly reflective reflector surface 13 on. In the light exit level 16 is in a slot 21 the lens 18 an LED light source unit 30 directly on the heat sink 20 appropriate. The light source unit 30 is as a circuit board 26 with high-power LEDs mounted on it 24 educated. On the circuit board 26 are tracks for the electrical connection of the LEDs 24 intended.
  • The electrical supply takes place from a front end of the lamp 10 ago. At one of the end plates 14 is a screw terminal block 27 provided, the electrical contacts with a passage (not shown) through the end plate 14 provided and so with the circuit board 26 connected is.
  • On the screw terminal block 27 can, as in 7 . 8th shown, connection cable 32 be connected for electrical contact. As in further 6 - 8th shown, the end plate 14 a connection tongue 34 for mechanical connection of the lamp 10 on. The connection tongue 34 is as from the front of the lamp 10 protruding flat metal tab formed with a fixing hole. As in 22 shown, the lamp can 10 in a light 100 be exchanged by an electrical control and operating device 102 with the connection block 27 is connected and the connection tabs 34 on both end faces with corresponding receptacles on a lamp housing 104 be connected, for example by a screw connection. That way is the lamp 10 at the light 100 mechanically attached and electrically contacted so that the control and operating device 102 , which is connected to a mains voltage supply, one for the operation of the lamp 10 suitable voltage is supplied and the lamp 10 can be controlled in this way.
  • In 9a . 9b is a second and in 10a . 10b a third embodiment of a closure plate shown. In the second embodiment according to 9a . 9b is the connection tongue 34 also formed horizontally in the longitudinal direction of the lamp, but at the back of the reflector. In the third embodiment, the terminal tongue 34 perpendicular, provided parallel to the end plate.
  • As in 11a . 11b (for symmetry reasons only for half of the reflector) shown, the LED emits 24 on the reflector 12 Light off. The entire luminous flux is from the reflector wall 13 reflected. At the reflector wall 13 the light is in the main direction of the lamp 10 reflected, ie in the opposite direction of the radiation of the LED 24 , The luminous flux, which is very close to the top of the reflector, is reflected on the LED 24 and her board 26 reflected back, so that it comes in this area to a certain shade. Due to the narrow shape of the board 26 However, the entire shading effect remains relatively low. Later will be part of 20a . 20b discussed a way how the shading is further reduced.
  • At the in 11a . 11b variant shown is the reflector wall 13 of parabolic shape. The LED 24 is arranged in the focal point, so that light emitted there is reflected substantially in parallel and through the lens 18 essentially passes through in parallel. The result is like in 11b shown in the A-plane a very narrow light distribution curve with maximum light intensity.
  • In the variant according to 12a is the shape of the reflector surface 13 an ellipse shape with two focal plane F1 and F2. In the upper focal plane F1 are the LED elements 24 arranged. The light emitted from there is in the distance in front of the light exit area 16 arranged second focal plane F2 bundled.
  • This can be like in 12b take advantage of the total luminous flux of the lamp 10 with elliptical reflector through a narrow slit-shaped opening 36 through. Such a slot-shaped opening 36 may, for example, be provided on a light, so that the light - except for the slot 36 - is almost completely closed.
  • In the embodiment of a lamp according to the partial view in 13 is provided for controlling or fixing the light emission angle in the lamp longitudinal direction (B-plane), that at the exit area 16 of the reflector 12 slats 40 are arranged. The slats 40 are formed in the example shown as a flat diaphragm, which is parallel to the emission direction of the reflector 12 are arranged. They have a certain height in the light emission direction, with which the beam angle is defined in the longitudinal direction.
  • In an alternative embodiment according to 14 - 16 are on the board 26 between the individual LED elements 24 slats 42 arranged. These lamellae serve to limit the width of the light distribution in the longitudinal direction. Depending on the height, the distribution can be set as narrow as desired. The slats 42 can be opaque. Particularly preferred is a reflective surface of the slats 42 , in particular in conjunction with a curved cross-sectional shape of the slats 42 as in 16 shown. Because the slats 42 between the LED elements 24 are arranged, despite the associated limitation of the width of the radiation, an almost complete utilization of the radiated light can be achieved.
  • The emission characteristic of a lamp as described above, can be - in addition to the described variation of the shape of the reflector 12 - Also by the arrangement of corresponding optical elements in the light exit plane 16 influence. Here, transmitting optical elements can be introduced in order to achieve a desired light distribution - bundling, widening, scattering, etc. The optical elements may be provided as a separate unit, but particularly preferred are in the lamp termination 18 even provided. So can the surface of the lens 18 according to a first embodiment ( 17a . 17b ) have a structure with round elevations. As the light distribution curve shows, this makes the broadcast wider than with the mere use of a parabolic reflector.
  • A further optical effect can be achieved by the use of a prism structure according to the second embodiment ( 18a . 18b ) be achieved. The prismatic structure of the lens 18 leads to a deflection of the vertically incident rays on both sides, so that the in 18b shown relatively wide light distribution curve arises.
  • Finally, as in the third embodiment ( 19a . 19b ), the lens 18 also scatter the light diffusely, so that a diffuse light distribution curve ( 19b ) arises.
  • In 20a . 20b is a possible measure described with which a shadowing of the reflector 12 reflected light on the board 26 can be reduced. The area of the reflector surface 13 , which is relevant for such a shadowed reflection, in the example shown is the middle region 15 , To avoid shading, therefore, is the reflector surface 13 , which in the remaining area as described above, for example. Parabolically shaped, procure differently at this point. As in the enlargement of 20b becomes clear, is an involute shape with a middle peak 19 educated. This will cause rays coming from the LED 24 go out, no longer as with a parabola-shape substantially perpendicular, that is radiated back without angle change, but they are from the side flanks of the elevation 19 reflected to the side and thus no longer hit the board 26 ,
  • While symmetrical reflector cross-sections have always been discussed in the foregoing description, the embodiment of FIG 21a . 21b an alternative in which the reflector 12 has only a cross-sectional area, which essentially corresponds to the halving of a symmetrical reflector shape (of course here, depending on the desired properties, for example. With parabolic or even freiflächigem course of the reflector surface 13 ). The side of the reflector space is closed by a flat mirror surface 46 completed. As 21b shows, the corresponding light intensity distribution is unbalanced. The entire luminous flux of the LED light source passes through an approximately half the size of the lamp termination as in the previously described embodiments.

Claims (24)

  1. Lamp unit ( 10 ) with a reflector ( 12 ) with a reflector wall whose boundary forms an exit area ( 16 ), and a linear light source unit ( 30 ) with at least one LED light source ( 24 ) in the exit area ( 16 ) at a distance in front of the reflector wall is arranged so that it emits light in the direction of the reflector wall, - in which at the light source unit ( 30 ) a heat sink ( 20 ) provided by the exit area ( 16 ), wherein the exit area ( 16 ) by a transmitting conclusion ( 18 ) is closed, so that a closed reflector space is formed, - wherein the reflector ( 12 ), the conclusion ( 18 ), the light source unit ( 26 ) and the heat sink ( 20 ) are permanently connected to each other, - and wherein on the outside of the lamp unit ( 10 ) at one end of the reflector ( 12 ) a detachable electrical connection ( 27 ) for supplying electric power to the light source unit ( 30 ) is provided.
  2. Lamp unit ( 10 ) according to claim 1, in which - the conclusion as a lens ( 18 ), which is arranged in a light exit plane, - wherein the heat sink ( 20 ) from the lens ( 18 ) protrudes in the direction of the light emission.
  3. Lamp unit ( 10 ) according to claim 1 or 2, wherein - the light source unit ( 30 ) a plurality of LED light sources ( 24 ), the LED light sources ( 24 ) are arranged one behind the other in the longitudinal direction.
  4. Lamp unit ( 10 ) according to claim 3, wherein - the LED light sources ( 24 ) on a common carrier ( 26 ) are arranged with conductors for electrical supply.
  5. Lamp unit ( 10 ) according to one of the preceding claims, in which - the electrical connection ( 27 ) is provided as a plug connection, terminal connection or screw connection.
  6. Lamp unit ( 10 ) according to one of the preceding claims, in which - a detachable mechanical connection ( 34 ) of the lamp unit ( 10 ) for attachment to a luminaire ( 100 ) is provided.
  7. Lamp unit ( 10 ) according to claim 6, in which - the mechanical connection has a projecting end tongue ( 34 ).
  8. Lamp unit ( 10 ) according to one of the preceding claims, in which - at least one end face of the reflector ( 12 ) a closure plate ( 14 ) with a mechanical connection ( 34 ) and an electrical connection ( 27 ) is provided.
  9. Lamp unit ( 10 ) according to one of the preceding claims, in which - a number of transversely to the longitudinal direction of the light source unit ( 30 ) arranged lamellae ( 40 . 42 ) is provided.
  10. Lamp unit ( 10 ) according to claim 9, in which - lamellas ( 40 ) at the exit area ( 16 ) are arranged.
  11. Lamp unit ( 10 ) according to claim 9 or 10, wherein - lamellae ( 42 ) at the light source unit ( 30 ) between the light sources ( 24 ) are arranged.
  12. Lamp unit ( 10 ) according to one of the preceding claims, in which - at the exit area ( 16 ) at least one flat, transparent optical element ( 18 ) for the deflection of the reflector ( 12 ) reflected light is provided.
  13. Lamp unit ( 10 ) according to claim 12, wherein - the optical element ( 18 ) has a structured surface that deflects the light so that the angle of emission of the light is increased.
  14. Lamp unit ( 10 ) according to claim 12 or 13, wherein - the optical element ( 18 ) has a longitudinally constant cross-section.
  15. Lamp unit ( 10 ) according to one of the preceding claims, in which - the light of the light source unit ( 30 ) in a focal axis (F2) at a distance from the exit area (F2) 16 ) is bundled.
  16. Lamp unit ( 10 ) according to one of the preceding claims, in which - the heat sink has at least one cavity for receiving a cooling medium.
  17. Lamp unit ( 10 ) according to claim 16, wherein - the cooling body has at least one end face a connection for the cooling medium.
  18. Lamp unit ( 10 ) according to one of the preceding claims, in which - the conclusion ( 18 ) a longitudinally extending gap ( 21 ), in which the heat sink formed as a profile ( 20 ) is arranged.
  19. Lamp unit ( 10 ) according to one of the preceding claims, in which - the reflector ( 12 ) in a subarea ( 15 ) a cross-sectional shape with a middle elevation ( 19 ), so that from the light source unit ( 30 ) incident light at the portion in a direction on the light source unit ( 30 ) is reflected by.
  20. A lamp unit according to claim 19, wherein - the sub-area ( 15 ) has an involute shape.
  21. Lamp unit ( 10 ) according to one of the preceding claims, in which - the exit area ( 16 ) has a length of 5-100 cm, preferably 10-60 cm and a width of 2.5-20 cm, preferably 5-10 cm.
  22. Lighting system with - a lamp ( 100 ) with a housing and an electrical connection, - and a receptacle in which a lamp unit ( 10 ) according to one of the preceding claims 1-21, wherein the receptacle comprises a mechanical connection which is connected to a mechanical connection of the lamp unit ( 34 ), and an electrical contact which is connected to an electrical contact ( 26 ) of the lamp unit ( 10 ) connected is.
  23. Lighting system according to claim 22, in which - the luminaire ( 100 ) an electrical operating and / or control device ( 102 ) for supplying one for the operation of the LED light source unit ( 30 ) suitable voltage at the electrical contact ( 26 ) having.
  24. Lighting system according to claim 22 or 23, wherein - the luminaire ( 100 ) has a slot-shaped light exit area, - and the lamp ( 10 ) is formed so that the light of the light source unit ( 30 ) in a focal axis (F2) at a distance from the exit region ( 16 ) is focused, - wherein the focal axis (F2) at the slot-shaped light exit region of the lamp ( 100 ) is arranged.
DE102007030186A 2007-06-27 2007-06-27 Linear LED lamp and lighting system with the same Expired - Fee Related DE102007030186B4 (en)

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DE102007030186A DE102007030186B4 (en) 2007-06-27 2007-06-27 Linear LED lamp and lighting system with the same
DE112008001660T DE112008001660A5 (en) 2007-06-27 2008-06-26 Linear LED lamp
EP08773700.3A EP2171350B1 (en) 2007-06-27 2008-06-26 Linear led lamp
PCT/EP2008/005225 WO2009000536A1 (en) 2007-06-27 2008-06-26 Linear led lamp

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EP2171350B1 (en) 2018-08-15
EP2171350A1 (en) 2010-04-07
DE112008001660A5 (en) 2010-10-28
DE102007030186A1 (en) 2009-01-02
WO2009000536A1 (en) 2008-12-31

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