EP2912651B1 - Élément émetteur de lumière pour une lampe ainsi que lampe pourvue d'un élément émetteur de lumière - Google Patents

Élément émetteur de lumière pour une lampe ainsi que lampe pourvue d'un élément émetteur de lumière Download PDF

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Publication number
EP2912651B1
EP2912651B1 EP13788705.5A EP13788705A EP2912651B1 EP 2912651 B1 EP2912651 B1 EP 2912651B1 EP 13788705 A EP13788705 A EP 13788705A EP 2912651 B1 EP2912651 B1 EP 2912651B1
Authority
EP
European Patent Office
Prior art keywords
light
emitting element
luminaire
section
light emitting
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
EP13788705.5A
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German (de)
English (en)
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EP2912651A1 (fr
Inventor
Georg Hobelsberger
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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 Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2912651A1 publication Critical patent/EP2912651A1/fr
Application granted granted Critical
Publication of EP2912651B1 publication Critical patent/EP2912651B1/fr
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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/08—Signs, boards or panels, illuminated from behind the insignia using both translucent and non-translucent layers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/14—Arrangements of reflectors therein
    • G09F2013/142—Arrangements of reflectors therein multiple reflectors

Definitions

  • the invention relates to a plate-like light-emitting element for a lamp and a lamp with such a light-emitting element.
  • a luminaire with a light-emitting element is out of the documents DE 10 2010 063 272 A1 and US 5365411A known.
  • This lamp has a trough-shaped luminaire housing, through which a light-emitting opening is formed, which is covered by the light-emitting element.
  • the light-emitting element has a planar light-emitting surface, by which a surface normal is determined.
  • the light-emitting element has a latching element which-viewed in a projection along the surface normal-is arranged completely within the area circumscribed by the light-emitting surface. As a result, the light-emitting element can be supported on the luminaire housing without the need for a frame element.
  • the inner surface of the light-emitting element facing towards the interior of the luminaire is provided with a structure for scattering or equalizing the light.
  • Narrow side surfaces of the light emission element which are also visible from the outside when viewing the luminaire and which are formed in alignment with the adjoining outer surfaces of the luminaire housing, adjoin the light emission surface, separated from the latter via edge edges.
  • a reflector element is arranged, which extends in a funnel shape towards the edge region of the light emitting element. As a result, it is achieved that the light emission surface appears well illuminated up to its edges. However, the light output over the narrow side surfaces of the light emitting element is significantly inhomogeneous than the light output via the light emitting surface.
  • the invention has for its object to provide an improved light-emitting element, in particular a light-emitting element, which also has corresponding Side surface areas allows a more homogeneous appearing light output.
  • a luminaire is to be specified with a corresponding light-emitting element.
  • a plate-like light-emitting element for a luminaire which has a first partial area and a second partial area, wherein - viewed in an intended light emission direction - the first partial area is arranged following the second partial area, wherein the first partial area is designed to be a light-emitting area
  • the second subregion is configured to form no outer surface region of the luminaire and wherein the first subregion consists of an optically clear material and the second subregion adjoins the first subregion with a component consisting of an optically diffuse material.
  • the light-emitting element is designed such that at least one recess for holding the light-emitting element is formed on an outer circumference of the second portion, which extends up to the light-emitting surface.
  • a luminaire housing of the luminaire extends as far as the light emission surface and the light emission surface is illuminated particularly evenly.
  • this design makes it possible for an outer wall surface region of the luminaire housing to extend in alignment with the light emission surface.
  • the design is such that the at least one recess and the light emitting surface form an edge which encloses an angle which is between 100 ° and 170 °, preferably between 120 ° and 150 °, can on the one hand a particularly good illumination of the light emitting surface achieve to the limit to the outer wall surface area and on the other hand, a secure mounting of the light emitting element to the lamp housing.
  • the at least one recess is produced by a milling, in particular by a milling which is wedge-shaped or triangular in cross-section.
  • the first portion of the light emitting element is cuboid shaped.
  • the light-emitting element of PMMA (polymethyl methacrylate) or acrylic.
  • it is formed from a multilayered, in particular produced by a casting process, composite panel material.
  • a particularly advantageous appearance of the light-emitting element or the luminaire can be achieved if the light-emitting surface is polished.
  • a luminaire which has a light-emitting element according to the invention, and a luminaire housing, on which the light-emitting element is held.
  • the lamp is designed such that the lamp housing extends to the light emitting surface.
  • the light emitting surface is designed to extend in a further plane
  • the lamp housing has an outer wall surface area which extends up to the light emitting surface and which is also designed to extend in the further plane. This makes it possible to achieve a particularly high-quality appearance of the lamp.
  • a particularly secure or reliable mounting of the light-emitting element to the luminaire housing is made possible if the luminaire housing has at least one holding element which is suitable for holding the light-emitting element to the luminaire Luminaire housing is arranged engaging in the at least one recess of the light emitting element.
  • the lamp also has a light source for emitting a light, wherein the lamp is designed such that the emitted light from the light source radiates into the second portion of the light emitting element and leaves the luminaire in the further sequence on the first portion of the light emitting element.
  • a particularly homogeneous backlighting of the light-emitting element can be effected if the luminaire also has a reflector element with two reflector surfaces which are designed and arranged in the luminaire housing in such a way that they extend divergently to the light-emitting element.
  • the two reflector surfaces are designed white, especially painted white.
  • Fig. 1 is a perspective sketch of a lamp 2 according to the invention with a light emitting element 1 according to the invention shown.
  • the luminaire 2 has a luminaire housing 10 which, in the example shown, is made oblong, so that it extends along a longitudinal axis L. In Fig. 1 only a portion of the lamp housing 10 is sketched along the longitudinal axis L.
  • the luminaire housing 10 may be designed in the shape of a profile, so that it has a U-shape in a cross-section normal to the longitudinal axis L and thus a first U-leg 101 and a second U-leg 102 are formed. In the area between the free ends of the two U-legs 101, 102 is then preferably formed by the lamp housing 10, a light emitting area 19 of the lamp 10.
  • the lamp housing for example, be trough-shaped, in particular cuboid, so that by the edge of the tub, a corresponding light emitting area 19, in particular in the form of a light emitting opening is formed.
  • the lamp housing 10 may be made of aluminum.
  • the luminaire housing 10 can be designed in particular as an extruded profile.
  • the light-emitting element 1 is designed as a whole plate-like or plate-shaped and held on the lamp housing 10 that it is in the light emitting area 19, or that it covers the light emitting opening. In the example shown extends in a cross section normal to the longitudinal axis L considered the light emitting element 1 accordingly between the two free ends of the two U-legs 101, 102.
  • the light emitting element 1 is accordingly also designed to be elongated and profile-shaped, which - like the Luminaire housing 10 - extends parallel to the longitudinal axis L.
  • a light source 15 for example an LED light source, for emitting a light is arranged in the luminaire housing 10, the luminaire 2 being such is designed so that the light of the light source 15 enters the light emitting element 1 on a first side and leaves in the course on another side, the light emitting element 2 and thus also the light.
  • the light source 15 is preferably elongated so that it extends parallel to the longitudinal axis L.
  • the light source 15 may comprise LEDs arranged along a straight line parallel to the longitudinal axis L, for example on at least one LED board.
  • at least one fluorescent tube can be provided as the light source, for example.
  • the luminaire 2 is oriented with respect to the vertical such that the light-emitting element 1 points downward, as in FIG Fig. 7 indicated by an arrow u .
  • the lamp 2 may also be provided for a different orientation with respect to the vertical. The directions etc. are to be reinterpreted accordingly in such a case.
  • a light output of the lamp 2 is provided in the lower half space, in particular by a provided Lichtabstrahlraum R of the lamp 2 and the light emitting element 1 around, which points vertically downwards, ie also in the direction of the arrow u.
  • the light emission direction R is thus normally directed in the example shown with respect to the plate shape of the light-emitting element 1.
  • Fig. 2 is another cross-section through the light 2 normal to the longitudinal axis L sketched - here without the light source 15 - and in Fig. 4 the separated light-emitting element 1.
  • the light-emitting element 1 has a first sub-area 3 and a second sub-area 4, wherein - viewed in the intended Lichtabstrahlutter R - the first portion 3 of the second portion 4 is arranged below. It is thus provided that the light emitted by the light source 15 of the luminaire 2 enters the light emission element 1 via the second partial region 4 and leaves the latter again via the first partial region 3.
  • the first portion 3 is adapted to form a light emitting surface 5 of the lamp.
  • the first portion 3 of the light-emitting element 1 is cuboid-shaped, with the main axis of the cuboid extending parallel to the longitudinal axis L in the intended orientation. Accordingly, the light-emitting element 1 has a width b transverse to the longitudinal axis L , and a vertical extent or height h.
  • the width b may for example be between 5 and 20 cm
  • the height h for example, be between 1 and 4 cm.
  • the extent of the luminaire 2 along the longitudinal axis L may be for example between 50 cm and 10 m.
  • the light emitting element 1 can be as long as the light 2 or shorter.
  • Said light emitting surface 5 of the light emitting element 1 is formed in the example shown by a side surface of the cuboid, so that it forms a "lateral", light emitting surface 5.
  • an additional lateral light emitting surface 51 is accordingly formed, and by the u downwardly facing base area of the cuboid a downwardly facing and lower light output surface 52nd
  • the light emitting element 1 as well as the lamp housing 10 with respect to a - here vertical - symmetry plane S symmetrically formed or shaped.
  • a particularly even-looking appearance of the luminaire 2 is possible.
  • the second portion 4 of the light emitting element 1 is configured to form no outer surface region of the lamp 2. In the example shown, it is provided that the second portion 4 is completely within the two U-legs 101, 102 when the light-emitting element 1 is mounted as intended on the lamp housing 10.
  • the light-emitting element 1 is preferably designed such that between the first portion 3 and the second portion 4 a Boundary surface 6 is formed, which runs in a plane E.
  • the design is such that the interface 6 between the first portion 3 and the second portion 4 extends completely in this plane E.
  • the first subarea 3 extends from below to the plane E and the second subarea 4 from above.
  • the first portion 3 does not protrude above the plane E upwards and the second portion 4 does not protrude below the plane E down.
  • this is always to be understood as technically feasible.
  • the first portion 3 is made of an optically clear material.
  • the first portion 3 made of PMMA or acrylic.
  • the light-emitting surface 5 is preferably polished.
  • the further lateral light emitting surface 51 and / or the lower light emitting surface 52 are preferably polished.
  • the second portion 4 has a portion 41 which consists of an optically diffuse material and which is directly adjacent to the first portion 3.
  • the portion 41 is formed by a lower layer of the second portion 4, wherein an upper layer 42 of the second portion 4 may consist of either a diffuse or a clear material.
  • the proportion 41 of the second subarea 4 can accordingly also form 100% of the second subarea 4 or the entire second subarea 4.
  • the second portion 4 is formed of PMMA or acrylic.
  • a particularly uniform illumination of the first portion 3 is made possible when the boundary surface 6 between the first portion 3 and the diffuse portion 41 of the second portion 4 is formed extending in the plane E , in particular completely or exclusively in the plane E is formed extending.
  • the design is such that the lower layer of the second portion 4, that is, the portion 41, extends upwardly to a second plane E2 , which extends above the first-mentioned plane E and parallel to the latter.
  • the light emitted by the light source 15 in the plane E quasi generates a homogeneously luminous surface, through which the light from the second subregion 4 enters the first subregion 3.
  • the design is preferably such that the interface 6 extends to the light emitting surface 5.
  • the boundary surface 6 also extends to the further lateral light-emitting surface 51.
  • the light-emitting element 1 can be made of one piece. Alternatively, it may be made of at least two pieces. For example, the first portion 3 and the second portion 4 may each be integrally formed, these two pieces are connected to form the light-emitting element 1 by gluing together, wherein the boundary surface 6 is formed by the bonding. Alternatively, however, another appropriate division into pieces may be provided, for example a division into two pieces along the second plane E2.
  • At least one recess 7 is formed on an outer periphery of the second portion 4 of the light emitting element 1, which extends to the light emitting surface 5 back.
  • Fig. 3 outlines the detail "A" off Fig. 2 shows.
  • Fig. 5 is shown in addition a sketch to a longitudinal section of the light emitting element 1 and in Fig. 6 a corresponding supervision.
  • the recess 7 shaped profiled so that it extends over the entire length of the light emitting element 1 out.
  • the recess 7 can furthermore be formed circumferentially around the light-emitting element 1 or the second sub-area 4, as is apparent Fig. 6 results.
  • a corresponding engagement or holding element 11 is preferably formed on the luminaire housing 10 - in the example shown on the free end region of the first U-leg 101.
  • the holding element 11 is preferably designed such that it is with respect to the luminaire housing 10 protrudes inwards.
  • the retaining element 11 may be a latching lug.
  • the luminaire housing 10 can be designed in a particularly suitable manner such that an outer wall surface region 17 of the luminaire housing 10, here of the first U-leg 101, extending to the light emitting surface 5 back.
  • the outer wall surface region 17 and the light emission surface 5 can be aligned in this way or in a common, further plane V.
  • both the light-emitting surface 5 and the outer wall surface region 17 are oriented vertically, so that the further plane V is a vertical plane.
  • the outer wall surface area 17 extends over the entire height of the first U-leg 101.
  • the first portion 3 of the light emitting element 1 down virtually without Rejuvenation or extension of the light housing 10 in its shape.
  • the recess 7 with the light emitting surface 5 forms an edge which encloses an angle ⁇ which is between 100 ° and 170 °, preferably between 120 ° and 150 °; in the example shown, the angle ⁇ is particularly preferably 135 °.
  • a particularly suitable shape of the recess 7 is made possible when the recess has an inclined surface 71 which directly adjoins the light emitting surface 5 and thus forms the said edge together with the light emitting surface 5, and a horizontal support surface 72 which is parallel to the plane E is shaped.
  • the recess 7 may be formed by the inclined surface 71 and the support surface 72.
  • the diffuse component 41 of the second subregion 4 extends exactly as far as the lower edge of the recess 7.
  • the recess 7 is viewed in cross-section wedge-shaped or triangular.
  • the inclined surface 71 is plan shaped, can be particularly suitable to achieve that no unwanted reflections or reflections of light rays occur that would adversely affect the light output of the lamp. Light of the light source 15 can thus reach well without shading to the upper edge of the first portion 3.
  • the recess 7 is formed by a milling. Through the recess 7 thus an undercut is formed. Above the bearing surface 72, the light-emitting element 1 or the second sub-area 4 is not as wide as the first sub-area 3. The distance between the second sub-area 4 above the bearing surface 72 and the further level V is at least one dimension d, that of a wall thickness of the first U-leg 101 corresponds.
  • the entire light-emitting element 1 is preferably formed from a multilayer composite panel material.
  • the first portion 3 may be formed from a first, optically clear layer of this plate material and the portion 41 of second portion 4 may be formed of a second, optically diffuse layer of this plate material.
  • a production by means of a casting process is suitable.
  • the luminaire furthermore preferably has a reflector element with two reflector surfaces 13, 14, by means of which the light from the light source 15 is directed in a particularly suitable manner to the light emission element 1.
  • the reflector surfaces 13, 14 are preferably designed in such a way that they extend in a diverging manner towards the light-emitting element 1.
  • the reflector surfaces 13, 14 are designed white, especially painted white.
  • the reflector element is preferably arranged in the luminaire housing 10.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (14)

  1. Elément émetteur de lumière (1) en forme de plaque pour une lampe (2), présentant une première région partielle (3) et une deuxième région partielle (4), la première région partielle (3) étant, vue dans une direction prévue de rayonnement de la lumière (R), disposée à la suite de la deuxième région partielle (4), la première région partielle (3) étant constituée pour former une surface d'émission de lumière (5) de la lampe (2), et la deuxième région partielle (4) étant constituée pour ne pas former de région de surface extérieure de la lampe (2),
    la première région partielle (3) se composant d'un matériau optiquement transparent, et la deuxième région partielle (4) étant directement adjacente à la première région partielle (3) par une fraction (41) composée d'un matériau optiquement diffus,
    caractérisé en ce que,
    sur un pourtour extérieur de la deuxième région partielle (4), il est formé au moins un creux (7), destiné à retenir l'élément émetteur de lumière (1), qui s'étend jusqu'à la surface d'émission de lumière (5).
  2. Elément émetteur de lumière (1) selon la revendication 1,
    qui est constitué de telle sorte que le creux (7) au moins au nombre de un et la surface d'émission de lumière (5) forment une arête qui forme un angle (α) qui est compris entre 100° et 170°, de préférence entre 120° et 150°.
  3. Elément émetteur de lumière selon la revendication 1 ou 2,
    dans lequel le creux (7) au moins au nombre de un est formé par un fraisage, en particulier à section transversale en forme de coin.
  4. Elément émetteur de lumière (1) selon l'une des revendications précédentes,
    dans lequel la première région partielle (3) est constituée en forme de parallélépipède.
  5. Elément émetteur de lumière (1) selon l'une des revendications précédentes,
    qui se compose de PMMA ou respectivement d'acrylique.
  6. Elément émetteur de lumière (1) selon l'une des revendications précédentes,
    qui est formé d'un matériau en plaque composite à plusieurs couches, fabriqué en particulier par un procédé de coulée.
  7. Elément émetteur de lumière (1) selon l'une des revendications précédentes,
    dans lequel la surface d'émission de lumière (5) est polie.
  8. Elément émetteur de lumière (1) selon l'une des revendications précédentes,
    qui est constitué de telle sorte que, entre la première région partielle (3) et la fraction (41) de la deuxième région partielle (4), il est formé une interface (6) qui est située dans un plan (E).
  9. Lampe (2), présentant
    - un élément émetteur de lumière (1) selon l'une des revendications précédentes et
    - un corps de lampe (10) sur lequel est retenu l'élément émetteur de lumière (1), la lampe étant constituée de telle sorte que le corps de lampe (10) s'étend jusqu'à la surface d'émission de lumière (5).
  10. Lampe (2) selon la revendication 9,
    dans laquelle la surface d'émission de lumière (5) est constituée en étant située dans un autre plan (V), et le corps de lampe (10) présente une région de surface de paroi extérieure (17) qui s'étend jusqu'à la surface d'émission de lumière (5) et qui est également située dans l'autre plan (V).
  11. Lampe (2) selon la revendication 9 ou 10,
    dans laquelle l'élément émetteur de lumière (1) présente les caractéristiques citées dans la revendication 2, et le corps de lampe (10) présente au moins un élément de retenue (11) qui, pour la retenue de l'élément émetteur de lumière (1) sur le corps de lampe (10), est disposé en s'engageant dans le creux (7) au moins au nombre de un de l'élément émetteur de lumière (1).
  12. Lampe (2) selon l'une des revendications 9 à 11, présentant également
    - une source de lumière (15) pour le rayonnement d'une lumière, la lampe étant constituée de telle sorte que la lumière rayonnée par la source de lumière (15) irradie dans la deuxième région partielle (4) de l'élément émetteur de lumière (1) et quitte par la suite la lampe (2) via la première région partielle (3) de l'élément émetteur de lumière (1).
  13. Lampe (2) selon l'une des revendications 9 à 12, présentant également
    - un élément réflecteur avec deux surfaces de réflecteur (13, 14) qui sont constituées et disposées dans le corps de lampe (10) de telle sorte qu'elles s'étendent de façon divergente vers l'élément émetteur de lumière (1).
  14. Lampe (2) selon la revendication 13,
    dans laquelle les deux surfaces de réflecteur (13, 14) sont constituées en blanc, en particulier sont peintes en blanc.
EP13788705.5A 2012-10-25 2013-10-23 Élément émetteur de lumière pour une lampe ainsi que lampe pourvue d'un élément émetteur de lumière Active EP2912651B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202012104101.4U DE202012104101U1 (de) 2012-10-25 2012-10-25 Lichtabgabeelement für eine Leuchte, sowie Leuchte mit einem Lichtabgabeelement
PCT/EP2013/072140 WO2014064139A1 (fr) 2012-10-25 2013-10-23 Élément émetteur de lumière pour une lampe ainsi que lampe pourvue d'un élément émetteur de lumière

Publications (2)

Publication Number Publication Date
EP2912651A1 EP2912651A1 (fr) 2015-09-02
EP2912651B1 true EP2912651B1 (fr) 2016-06-29

Family

ID=49552333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13788705.5A Active EP2912651B1 (fr) 2012-10-25 2013-10-23 Élément émetteur de lumière pour une lampe ainsi que lampe pourvue d'un élément émetteur de lumière

Country Status (3)

Country Link
EP (1) EP2912651B1 (fr)
DE (1) DE202012104101U1 (fr)
WO (1) WO2014064139A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5365411A (en) * 1993-01-06 1994-11-15 Kaufel Group Ltd. Exit signs with LED illumination
US6732478B1 (en) * 1999-09-22 2004-05-11 Michael Gulvin Russell Lighting panel
GB2376287A (en) * 2001-05-18 2002-12-11 Michael Gulvin Russell Luminous tile
DE20211708U1 (de) * 2002-07-30 2002-11-21 Herbert Waldmann GmbH & Co., 78056 Villingen-Schwenningen Einbauleuchte
DE202004011168U1 (de) * 2004-06-18 2004-10-07 Gutkes Elektro Vertriebs Gmbh Leuchte, insbesondere Pflastersteinleuchte
ITMI20050181U1 (it) * 2005-05-16 2006-11-17 Guzzini Illuminazione S P A I Dispositivo di illuminazione a distribuzione asimmetrica
GB2468005A (en) * 2009-02-18 2010-08-25 Essence Invest Ltd LED illuminated light box display
DE102010063272A1 (de) 2010-12-16 2012-06-21 Zumtobel Lighting Gmbh Leuchte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
DE202012104101U1 (de) 2014-01-30
WO2014064139A1 (fr) 2014-05-01
EP2912651A1 (fr) 2015-09-02

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