EP2207996B1 - Lampe led à diffuseur - Google Patents

Lampe led à diffuseur Download PDF

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Publication number
EP2207996B1
EP2207996B1 EP08840029.6A EP08840029A EP2207996B1 EP 2207996 B1 EP2207996 B1 EP 2207996B1 EP 08840029 A EP08840029 A EP 08840029A EP 2207996 B1 EP2207996 B1 EP 2207996B1
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EP
European Patent Office
Prior art keywords
lamp
end element
angle
diffuser
light
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.)
Active
Application number
EP08840029.6A
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German (de)
English (en)
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EP2207996A1 (fr
Inventor
Hofmann Harald
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 GmbH
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Siteco GmbH
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Publication date
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-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
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling 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
    • F21V29/763—Cooling 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/061—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to an LED lamp.
  • a lamp is understood to mean a product in which an electrical light source is connected to further electrical, optical and / or mechanical elements to form an inseparable unit. Such a lamp is always intended only as a whole for interchangeable inclusion in a lamp.
  • the US 5,954,423 shows a diffuser for illuminating information signs.
  • a row of LED elements illuminates an essentially transparent and preferably textured diffuser element which has a tent shape.
  • the diffuser element is elongated and is used in conjunction with a series of LEDs mounted on a support, with posts spacing the diffuser element from the support.
  • KR-B-100762277 describes a completely closed LED lamp.
  • An LED element is arranged inside a reflector and illuminates a semicircular cover. Structures for diffusing the light are provided on the surface of the cover.
  • the US 5,806,965 discloses an improved signal light with a variety of LEDs.
  • the luminaire has a signal component, in which a large number of individual LEDs are attached to interconnected printed circuit boards in order to form an omnidirectional arrangement of LEDs.
  • the lamp according to the invention has one or more LED elements as light sources. These are attached to the lamp housing, and are preferably thermally connected to a heat sink, particularly preferably made of metal.
  • the heat sink can be part of the lamp, but an external heat sink can also be used.
  • the housing has electrical and mechanical connection means. In principle, these can have any shape and are used for mechanical attachment at the place of use, for example in a luminaire, and for electrical connection to a power supply or control. Furthermore, the lamp has a light exit area which is closed with a translucent end element. The LED element itself is preferably arranged on the inside, preferably completely closed, so that no contamination or mechanical impairment is possible.
  • the termination element is an optical diffuser element.
  • Such an element can, for example, consist of a material such as glass or plastic, in which scattering particles are provided within the material (volume scattering).
  • the diffuser element can be made of colored, i.e. not white material. It is also possible for the diffuser element to be coated on the inside with a phosphor which is visibly illuminated by UV excitation.
  • the end element is of a special shape, which is shown in cross section.
  • the two sections merge into each other in the further course, they meet at an apex, the intersection of the two straight lines or in a rounded transition.
  • the wall is preferably formed in cross section at least over half its length from the straight sections, particularly preferably to more than 60%.
  • a lamp according to the invention is particularly useful for many lighting applications: The lamp has the outstanding properties of LED lighting in terms of long lamp life, high luminous efficacy and a large selection of light colors.
  • the relatively high luminance levels of the LED elements are largely evenly distributed over a larger area and the luminance levels are reduced or the luminance distribution is homogenized. In this way, in particular when using differently colored LEDs, a homogeneous additive light mixture is possible.
  • the lamp is also excellently suitable for use in a luminaire, preferably with a mirror reflector, in particular with a parabolically shaped reflector.
  • the straight wall sections of the end element form the diffuser element angle ⁇ in cross section to one another. As explained in connection with preferred embodiments, this angle is associated with the shielding angle ⁇ of the lamp when used in a reflector. With optimal use of the space available for lamp installation, the double lamp shielding angle 2 ⁇ and the diffuser element angle ⁇ add up to 180 °.
  • the diffuser element angle ⁇ can be selected on the one hand as a function of a predetermined lamp shielding angle.
  • a diffuser element angle of 140 ° is well suited, for example, to achieve optimum utilization with a given lamp shielding angle of 20 °.
  • the diffuser element angle ⁇ is set to not more than 140 °, more preferably to not more than 120 °, so that with good utilization, relatively high values for the lamp shielding angle ⁇ (at least 20 °, preferably 30 ° or more) can be achieved.
  • the light exit area in the top view of the lamp is either essentially round (this also includes slight deviations from the round shape, for example elliptical shapes) or essentially elongated (ie that the longitudinal extension is greater than the transverse extension, preferably that Longitudinal extension is at least 1.5 times, particularly preferably more than 2 times the transverse extension).
  • the cross-sectional geometry according to the invention can be the same in both cases.
  • the diffuser element is preferably cylindrical, i. H. that it has essentially the same cross section over the longitudinal extent of the lamp.
  • several LED individual elements or element groups (clusters) are preferably arranged one behind the other in the longitudinal direction of the lamp.
  • the lamp with an essentially round light exit area is preferably rotationally symmetrical, the axis of symmetry being central in the main emission direction to the final element.
  • the end element has the shape of a cone shell, that is to say that its wall follows the shape of a cone shell at least in the area in which the straight sections are shown in cross section. In the further course the cone can taper, but it is preferred that the cone tip is rounded.
  • the LED elements are arranged symmetrically to the main emission direction. In the case of a single LED element, this is preferably arranged exactly in the middle. Alternatively, several LED elements can be arranged in such a way that they form an essentially symmetrical arrangement, for example a 3 ⁇ 3 matrix.
  • Fig. 1 shows a schematic cross-sectional view of a first embodiment of a lamp 10, which in FIG Fig. 2 and Fig. 3 is shown further.
  • This first embodiment is a compact, rotationally symmetrical LED lamp.
  • a single LED element 12 with one LED chip or a plurality of LED chips on a circuit board is provided as the illuminant.
  • Such LED elements with sufficient power for lighting applications are known and are therefore not explained in more detail below.
  • the lamp 10 has a base system 14 with a heat sink 16 and brackets 18.
  • the heat sink 16 and the LED element 12 are firmly connected to a round base plate 22 which, together with a diffuser element 20, encloses a lamp interior 24.
  • the elements of the lamp 10, i. H. Base system 14, LED element 12, base plate 22 and diffuser 20 are non-detachably connected to each other, for. B. by welding or gluing, so that the lamp 10 forms a unit that can only be changed as a whole.
  • the LED element 12 illuminates the diffuser element 20 through the airtight interior 24.
  • the diffuser element 20 is a bowl-shaped element with translucent, diffusely scattering optical properties. As a result, the diffuser element 20 diffuses its light when illuminated by the LED element 12 and thus itself acts as a flat, secondary light-limiting element. This means that the shape of the LED element 12 as the primary light-imitating does not change from the outside Images element, but the outer shape of the diffuser element 20 is perceived as luminous. With a correspondingly non-directional radiation by the LED element 12, a relatively homogeneous luminance distribution on the diffuser element 20 results.
  • the diffusely scattering properties of the diffuser element 20 are generated by volume scattering on the wall, ie the material of the diffuser element 20 has scattering particles on the inside ( Fig. 13 ).
  • Such behavior is achieved, for example, by a material such as glass, plastic or ceramic, in which scattering particles are provided within the material.
  • the body of the diffuser element 20 itself from transparent material (eg glass, plastic) and to achieve diffuse scattering by the formation of surface structures, as exemplified in FIG Fig. 14 shown. It is also possible to provide a transparent diffuser element with an internally or externally applied diffusely scattering surface coating, for example a diffusely scattering film, as in FIG Fig. 15 shown. In all cases it is possible to use colored material instead of white material in order to achieve color effects with white LEDs, for example.
  • transparent material eg glass, plastic
  • diffusely scattering surface coating for example a diffusely scattering film
  • the lamp 10 has a light exit area, which in the example shown is formed by the area surrounding the diffuser element 20, ie the lamp 10 emits light in a largely converted manner. Nevertheless, a central optical axis O can be defined as the central axis of the light radiation, which in the example shown of a rotationally symmetrical lamp corresponds to the axis of symmetry. When viewed from a point on this axis, the light exit area of the lamp 10 appears round ( Fig. 2 ).
  • the diffuser element 20 is of a special external shape, which is particularly well suited for use in a reflector lamp, as shown below with the aid of Fig. 16 shown.
  • the diffuser element 20 can be seen formed from two identical, symmetrically arranged sections 26 with a straight cross section and a rounded transition section 28 lying between them.
  • the decisive factor here is the outer contour, in which shown preferred example, the diffuser element has a substantially constant wall thickness, so that the inner shape corresponds to the outer.
  • the outer contour of the diffuser element 20 corresponds to a truncated cone in the area of the straight sections 26, and to the rounded area 28 corresponds to a rounded tip of a cone, as in particular from Fig. 3 evident.
  • the straight sections 26 extend from the base plate 22, in the plane of which the LED element 12 is arranged.
  • the outer contour of the diffuser element 20 runs straight over a distance L.
  • the straight regions 26 and the rounded transition region 28 are in this case coordinated with one another in such a way that the lengths L of the straight sections 26 preferably cover the major part, ie. H. make up over half of the contour line.
  • the proportion can be considerably higher, for example over 60% or more than 80% as in the example shown.
  • the straight sections 26 run at an angle ⁇ (diffuser element angle) towards one another, so that a certain depth of the interior 24 is formed.
  • Fig. 16 schematically shows a lamp 30 in which the lamp 10 described above is installed.
  • the luminaire 30 comprises a rotationally symmetrical reflector 34 in a cylindrical luminaire housing 32. At the end of the reflector, a light exit plane 36 is formed.
  • the lamp 10 is mechanically fastened within the housing 32 with the aid of the mounting bracket 18 and electrically connected to an operating device 38 which, on the one hand, converts the supplied mains voltage into values for current and voltage required for the operation of the LED chip 12 and, on the other hand, control functions such as on - Switching off and possibly dimming (for example by appropriate modulation), color control (for example by correspondingly selective activation of differently colored LEDs with different outputs) etc.
  • Fig. 16 In the cross-sectional representation of Fig. 16 can be drawn on the parabolic reflector 34 between the upper edge of the reflector and the opposite lower edge of the reflector, the lines intersecting in the middle. You define the lamp shield angle a, within which the lamp 10 with your Luminance is not directly visible from the outside and is therefore hidden.
  • the contour of the reflector 34 is a parabola with the focal point F and the apex P (or P ', opposite), ie the parabola axis is inclined at an angle of 90 ° - ⁇ to the vertical.
  • a conical space designated by the isosceles triangle F, P, P ' is available as a lamp installation space, all light beams emitted from this space being emitted or reflected by the reflector 34 at an angle which is greater than ⁇ and therefore are hidden within the cut-off angle ⁇ outside the lamp 30.
  • the lamp light emerges from the luminaire after only a simple reflection, multiple reflections are avoided.
  • the diffuser 20 of the lamp 10 is shown so that it makes good use of the available lamp installation space.
  • the straight sections 26 run parallel to the crossing lines, forming the angle ⁇ with the base plate 22 in the example shown.
  • the reflector height or the luminaire installation depth h is minimized while the reflector width b or the luminaire volume is minimized.
  • the luminaire efficiency is optimized through the good utilization of the lamp installation space and the condition of the single reflection.
  • the lamp 10 has the rounded transition section 28 for manufacturing reasons.
  • this section can run with a greater curvature, up to the formation of a tip, so that the outer contour of the diffuser element 20 then has a complete conical jacket shape.
  • the diffuser element 20 can be shaped differently for different purposes, namely have different diffuser element angles ⁇ .
  • a shielding angle ⁇ of 30 ° is to be achieved.
  • the best possible use is made of the lamp installation space (straight sections 26 run parallel at the crossing lines) ⁇ + 2 ⁇ at 180 °. That means that to achieve a Shielding angle ⁇ of 30 ° a lamp with a diffuser element angle ⁇ of 120 ° would be optimal.
  • lamps with a less steep shape that is to say a larger diffuser element angle ⁇
  • the lamp 10 is located within the lamp installation space, but does not completely fill it, so that the straight sections 26 no longer run parallel to the crossing lines.
  • shielding angles ⁇ of 30 ° or 40 ° are preferred for luminaires.
  • Fig. 4 to Fig. 6 a second embodiment of a rotationally symmetrical compact lamp 110, which largely corresponds to the first embodiment of a compact lamp 10.
  • the LED cluster 112 consists of 3x3 LED elements.
  • the diffuser 20 serves as a secondary light source, which adds the contributions of the individual LED light sources as homogeneously as possible.
  • the lamp 210 shown there largely matches the compact lamp 10 in cross section Fig. 1 match. Unlike there, this is not a rotationally symmetrical lamp, but a linear lamp that extends straight in the direction of a longitudinal axis A. It has an elongated light source, which in the example shown is formed by LED elements 12 lined up in the direction of the longitudinal axis A.
  • the lamp 210 has a rectangular base plate 222 and a plan view of a central optical axis ( Fig. 8 ) rectangular light exit area.
  • the end of the linear lamp 210 is mechanically fastened by means of holding bracket 218.
  • the diffuser 220 is cylindrical in shape, ie it has a constant shape in the direction of the longitudinal axis A.
  • Fig. 7 Cross-sectional shape shown (that of the cross-sectional shape in the rotationally symmetrical variant, Fig. 1 , corresponds).
  • straight sections 26 and a rounded transition section 28 are provided starting from the base plate 222.
  • the lamp 210 is closed off by an end plate 206.
  • a base system 214 with a heat sink and end brackets 218 is also elongated.
  • the linear lamp 210 can have different overall lengths. It is preferably elongated in the direction of the axis A, i. H. that their longitudinal extent is greater than their transverse extent. Possible designs are, for example, a transverse extension of 2-10 cm, preferably 5-8 cm, and longitudinal dimensions of preferably more than 10 cm, for example 30 cm or more.
  • the linear lamp 210 can be in a linear reflector lamp 130 as in FIG 18, 19 insert shown. Except for the elongated instead of rotationally symmetrical shape, the linear reflector lamp 130 corresponds to that in connection with FIG 16, 17 explained compact reflector lamp 30, so that here the same geometric considerations apply to a lamp installation space and its utilization.
  • the linear reflector lamp 130 has a cylindrical linear reflector 134, which in cross section is also the same as in connection with Fig. 16 parabolic shape described. In the arrangement shown, it is ensured that the lamp light emerges from the luminaire 130 after a maximum of only one reflection on the linear reflector 134.
  • the linear reflector lamp can be as in Fig. 19 have lamellae 140 along their length at a distance.
  • FIG.10 to Fig.12 another linear lamp 310 is shown.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (20)

  1. Lampe (10, 110, 210, 310) avec
    - un ou plusieurs éléments à LED (12),
    - et un boîtier avec des moyens de raccordement électriques et mécaniques, dans lequel le boîtier comprend une partie de sortie de lumière avec un élément terminal transparent (20, 220),
    - dans lequel l'élément terminal est un élément diffuseur optique (20, 220),
    - et l'élément terminal (20, 220) présente une forme dans laquelle la paroi de l'élément terminal (20, 220) présente, en coupe transversale, deux portions droites (26) convergeant l'une vers l'autre
    - les portions (26) forment entre elles un angle (β) d'au moins 80°,
    - le boîtier comprend une plaque de base (22, 222) qui délimite, avec l'élément diffuseur (20, 220), un espace interne (24),
    caractérisé en ce que
    - les portions droites (26) de la paroi s'étendent, en coupe transversale, à partir de la plaque de base (22, 222) en formant un angle.
  2. Lampe (10, 110, 210, 310) selon la revendication 1, dans laquelle
    - la paroi est constituée, en coupe transversale, sur la moitié de sa longueur, des portions droites (26).
  3. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes, dans laquelle
    - les portions (26) forment entre elles l'angle (β) d'au moins 90°.
  4. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes, dans laquelle
    - les portions (26) forment entre elles l'angle (β) de 140° maximum, de préférence de 120° maximum.
  5. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes, dans laquelle
    - la paroi de l'élément terminal (20, 220) présente, en coupe transversale, une forme symétrique par rapport à un axe central.
  6. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes, dans laquelle
    - les éléments de LED (12) sont disposés sur un radiateur (16).
  7. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes, dans laquelle
    - le boîtier est obturé et l'élément terminal (20, 220) est monté de dessus de manière inamovible.
  8. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes, dans laquelle
    - l'élément terminal (20, 220) est constitué d'un matériau diffusant la lumière.
  9. Lampe (10, 110, 210, 310) selon l'une des revendications 1 à 9, dans laquelle
    - l'élément terminal (20, 220) est constitué d'un matériau transparent qui est revêtu d'un matériau diffusant la lumière.
  10. Lampe (10, 110, 210, 310) selon la revendication 10, dans laquelle
    - la couche est collée sous la forme d'un film.
  11. Lampe (10, 110, 210, 310) selon l'une des revendications 9 à 10, dans laquelle
    - le revêtement est appliqué à l'intérieur sur l'élément terminal (20, 220),
    - et l'élément à LED (12) émet une lumière ultraviolette qui excite le revêtement pour un éclairage dans le domaine visible.
  12. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes 1 à 7, dans laquelle
    - l'élément terminal (20, 220) est constitué d'un matériau transparent qui est muni d'une structure de surface réfringente.
  13. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes, dans laquelle
    - l'élément terminal (20, 220) est constitué d'un matériau coloré.
  14. Lampe (10, 110, 210, 310) selon l'une des revendications précédentes, dans laquelle
    - la partie de sortie de lumière est au moins globalement allongée,
    - et l'élément terminal (20, 220) présente une forme cylindrique.
  15. Lampe (10, 110, 210, 310) selon la revendication 14, dans laquelle
    - plusieurs éléments à LED (12) ou groupes d'éléments à LED ont disposés les uns derrière les autres dans la direction longitudinale de la lampe (10, 110, 210, 310).
  16. Lampe (10, 110, 210, 310) selon l'une des revendications 1 à 13, dans laquelle
    - la partie de sortie de lumière est au moins globalement ronde,
    - et l'élément terminal (20, 220) présente, au moins dans une première partie (26), la forme d'une enveloppe conique.
  17. Lampe (10, 110, 210, 310) selon la revendication 16, dans laquelle
    - l'élément terminal (20, 220) est symétrique en rotation dans la direction d'émission principale par rapport à un axe de sortie de lumière central (O).
  18. Lampe (10, 110, 210, 310) selon l'une des revendications 16 à 17, dans laquelle
    - plusieurs éléments à LED (12) sont disposés au moins globalement de manière symétrique autour du centre de la partie de sortie de lumière ronde.
  19. Sous-ensemble constitué d'une lampe (10, 110, 210, 310) selon l'une des revendications précédentes et d'un réflecteur (34, 134),
    - dans lequel le réflecteur (34, 134) est conçu et les lampe (10, 110, 210, 310) est disposée à l'intérieur du réflecteur (34, 134) de façon à ce que la lumière émise par la lampe (10, 110, 210, 310) sorte seulement après une simple réflexion et à ce qu'une réflexion multiple soit évitée.
  20. Sous-ensemble selon la revendication 19, dans laquelle
    - le réflecteur (34, 134) présente un angle anti-éblouissement (α),
    - et les portions, droites en coupe transversale, de la paroi de l'élément diffuseur (20, 220) de la lampe (10, 110, 210, 310) forment entre elles un angle d'élément diffuseur (β),
    - dans lequel β > 180° - 2α.
EP08840029.6A 2007-10-15 2008-10-09 Lampe led à diffuseur Active EP2207996B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007049581 2007-10-15
DE102007054206A DE102007054206A1 (de) 2007-10-15 2007-11-12 LED-Lampe mit Diffusor
PCT/EP2008/008548 WO2009049824A1 (fr) 2007-10-15 2008-10-09 Lampe led à diffuseur

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EP2207996A1 EP2207996A1 (fr) 2010-07-21
EP2207996B1 true EP2207996B1 (fr) 2020-05-27

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US (1) US8235547B2 (fr)
EP (1) EP2207996B1 (fr)
CN (1) CN101903702B (fr)
DE (1) DE102007054206A1 (fr)
WO (1) WO2009049824A1 (fr)

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Also Published As

Publication number Publication date
WO2009049824A1 (fr) 2009-04-23
US20100296281A1 (en) 2010-11-25
US8235547B2 (en) 2012-08-07
EP2207996A1 (fr) 2010-07-21
CN101903702A (zh) 2010-12-01
CN101903702B (zh) 2016-02-10
DE102007054206A1 (de) 2009-04-16

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