WO2013007744A1 - Module lumineux doté d'un élément de guidage de lumière contrôlable - Google Patents

Module lumineux doté d'un élément de guidage de lumière contrôlable Download PDF

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Publication number
WO2013007744A1
WO2013007744A1 PCT/EP2012/063559 EP2012063559W WO2013007744A1 WO 2013007744 A1 WO2013007744 A1 WO 2013007744A1 EP 2012063559 W EP2012063559 W EP 2012063559W WO 2013007744 A1 WO2013007744 A1 WO 2013007744A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
active
light module
module according
optical structure
Prior art date
Application number
PCT/EP2012/063559
Other languages
German (de)
English (en)
Inventor
Michael Eritt
Christian Kirchhof
Original Assignee
Ledon Oled Lighting Gmbh & Co. Kg
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 Ledon Oled Lighting Gmbh & Co. Kg filed Critical Ledon Oled Lighting Gmbh & Co. Kg
Priority to EP12737252.2A priority Critical patent/EP2732482A1/fr
Priority to CN201280034300.0A priority patent/CN103718322B/zh
Publication of WO2013007744A1 publication Critical patent/WO2013007744A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0875—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/0875—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements
    • G02B26/0883—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements the refracting element being a prism
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/003—Controlling the distribution of the light emitted by adjustment of elements by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • 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
    • 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]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the invention relates to a lighting module with a plate-shaped, active element and a plate-shaped support member having a surface on which the active element is arranged, and with a transparent light-emitting element, which is preferably formed by the support member.
  • Such a light-emitting module is known from the prior art in the form of an OLED lighting module (OLED: organic light-emitting diode).
  • OLED organic light-emitting diode
  • the OLED light module comprises a plate-shaped, active element in the form of two electrodes and an organic layer arranged between the electrodes, which emits light when current is applied to the electrodes.
  • the active element is arranged on a plate-shaped support element in the form of a glass plate or film made of plastic or metal. Through the glass plate, the light generated by the active element can leave the OLED module, so that the glass plate is a transparent light-emitting element.
  • an OLED acts as a Lambert 'em radiator. At the transition from the glass plate to the air in the adjacent outer space, total reflections occur due to the different refractive indices. As a result, the efficiency of the light extraction is limited.
  • the luminance is thus at least approximately independent of the emission angle.
  • a clear light output in a targeted direction is therefore not possible with the known light module as such.
  • This can be particularly disadvantageous if the light module is to be used as a surface-emitting luminaire or as part of such a luminaire, wherein light is to be emitted predominantly into a specific solid angle range.
  • the invention is based on the object, a corresponding improved
  • the lighting module should be improved
  • a lighting module which has a plate-shaped, active element, and a plate-shaped support member having a surface, on which the active element is arranged.
  • the light-emitting module also has a transparent light-emitting element, which is preferably formed by the carrier element. In this case, at least a part of a surface of the light-emitting element is provided with an active or variable optical structure.
  • the optical structure makes it possible to specifically influence the directional distribution in the output of the light generated by the active element.
  • Controlled light module targeted is particularly well suited for the realization of a directed illumination, for example for the illumination of objects. It is also possible to restrict a radiation angle of the light to be emitted; As a result, for example, in the case of a corresponding luminaire, a glare limitation can be effected.
  • the optical structure can also cause fewer totaheeflexions to occur on the surface of the light-emitting element, so that the light extraction efficiency of the light-emitting module can be increased in this way.
  • the active or variable optical structure comprises two transparent electrodes and a material located between the electrodes, the structure of which varies as a function of an electrical voltage applied between the electrodes.
  • the material located between the electrodes is a through
  • Elastomer or acrylates or an acrylate formed may be formed by, for example, an amorphous fluoropolymer.
  • the light module is designed such that the material located between the electrodes has a structure.
  • This structure may advantageously have a lens structure or be formed from such a lens structure.
  • this structure may have or be formed of a prism structure. This is particularly well suited for targeted light control.
  • the structure may be formed differently in different areas. As a result, a special lighting effect can be achieved.
  • the structure may therefore have, for example, different microstructures in different areas on the surface of the light-emitting element, for example prisms in a first region and lenses in a second region or prisms of a first orientation in a first region and prisms of a second orientation in a second region different from the first orientation.
  • the active or variable optical structure can advantageously extend over the entire surface of the light module. Alternatively it can be provided that extends the active or variable optical structure only over a portion of the surface of the light module. This also makes special
  • Light effects with the light module can be achieved.
  • this allows a combination of directed and undirected light output; this can be used, for example, to generate symbols on the light emission surface of the
  • Light module can be used.
  • the transparent light-emitting element Preferably, between the transparent light-emitting element and the active or variable optical structure another, with respect to their properties not changeable or not changeable optical structure is arranged.
  • This further optical structure may in particular have or consist of a Lmsen structure.
  • the light-emitting element may be formed by the carrier element and / or be formed by an encapsulation which is arranged on a side of the active element opposite the carrier element.
  • differently structured regions of the active or variable optical structure may also be formed on the encapsulation and / or the optical structure may optionally be formed differently on the side of the carrier element than on the side of the encapsulation.
  • the active element is formed by an OLED or QLED structure.
  • Figures 2a and 2b further sketches to the first embodiment to the
  • Figures 6a and 6b is a plan view and a sectional view of an embodiment with differently shaped surface areas and
  • the light module comprises a plate-shaped, active element 12.
  • the active element 12 is designed to generate a light when an electrical current is applied.
  • the active element 12 may comprise two electrodes, as well as an organic layer disposed between the electrodes, wherein upon application of the current to the electrodes, the organic layer generates the light.
  • the active element 12 may comprise or consist of an OLED.
  • the active element 12 may alternatively comprise or consist of a QLED (QLED: quantum dots light emitting diode). If the execution of the active element 12 with an opaque electrode, light is emitted only in the direction of the transparent second electrode of the active element 12; if, on the other hand, both electrodes of the active element 12 are made transparent, the
  • the lighting module comprises a transparent carrier element 10, which has a surface 101 on which the active element 12 is arranged.
  • the carrier element 10 may be a carrier substrate, in particular in the form of a glass plate or plastic film or plate.
  • the light module also includes a transparent or translucent
  • Light-emitting element 10 ' which - as in the example shown the case - can be formed in particular by the support member 10.
  • the lighting module can have an encapsulation 11, which is arranged opposite the support element 10 with respect to the active element 12 and which is designed to protect the active element 12 from undesired environmental influences.
  • the encapsulation 11 may also be designed plate-shaped. In that regard, the lighting module may correspond in particular to the known light module described above.
  • the light module can be designed as a lamp or as part of a lamp;
  • Lichtabgabe circuit 10 'have a size of more than 1 cm by 1 cm, preferably more than 3 cm by 3 cm.
  • a charge L of the light generated by the active element 12 is through the
  • Light emitting element 10 Provided therethrough.
  • the light module of the sketch in FIG. 1 is oriented in such a way that this output L takes place in the upper half space, that is to say briefly "upwards”.
  • a further delivery L 'of the light generated by the active element 12 with respect to the active element 12 may be provided in an opposite direction, or in the lower half space or shortly “downwards".
  • the light-emitting element 10 ' can also be formed by the encapsulation 11. Also, the light emitting element 10 'may be formed on the one hand by the support member 10 and on the other hand by the encapsulation 11, so be carried out in two parts. For the sake of brevity, the case where the light-emitting element 10 'is formed by the support member 10 will be considered below. In one of the further possible cases of the configuration of the light-emitting element 10 ', the description is to be correspondingly adapted to understand.
  • At least part of a surface 102 of the light emitting element 10 ' is provided with an active or variable optical structure 200. Accordingly, the light-emitting module is configured in such a way that the light generated by the active element 12 at least partially passes first through the light-emitting element 10 ', then leaves the optical structure 200 and subsequently the light-emitting module.
  • the surface 102 may be, in particular, a surface of the
  • Light emitting element 10 ' which is arranged opposite to the active element 12.
  • Light emitting element 10 ' that surface 102 which is at least partially provided with the optical slab Kr 200. If the optical structure 200 is at least partially arranged on the encapsulation 11, it is preferably provided accordingly-with reference to FIG. 1 -on the downwardly facing surface of the encapsulation 11.
  • FIGS. 2a and 2b an enlarged detail of FIG. 1 is sketched.
  • the surface 102 of the light-emitting element 10 ' can be seen with the optical structure 200.
  • the optical structure 200 can be changed as mentioned, and in FIGS. 2a and 2b two states of the optical structure 200 that are different in this sense are sketched by way of example.
  • the active or variable optical structure 200 preferably comprises a first transparent electrode 21 and a second transparent electrode 22, as well as a transparent material 20 located between the electrodes 21, 22 or a transparent layer located between the electrodes 21, 22; whose structure or shape changes as a function of an applied between the electrodes 21, 22 electrical voltage U. In this way, by changing the voltage U, the directional behavior of the light emitted by the lighting module can be influenced in a targeted manner.
  • the optical structure 200 in this sense represents an "adaptive" element or an "adaptive optic", the material 20 an "active material” or a "deflection layer".
  • the first electrode 21 can-in particular directly-be arranged flat on the surface 102 of the light-emitting element 10 ', the second electrode 22 above the material 20.
  • the electrodes 21, 22 can consist of an electrically conductive material, for example of ITO (indium-tin oxide), FTO (fluorine-doped tin oxide), ZnO (zinc oxide), PEDOT (polyethylenedioxythiophene) or the like.
  • the material 20 may be one of materials that changes surface tension based on "electrowetting," such as an amorphous fluoropolymer, and may also be an electroactive material, such as an elastomer or the like an acrylate.
  • the optical structure 200 may be formed to change its shape in response to said voltage such that the light generated by the active element 12 undergoes directional control as it passes through the optical structure 200 is dependent on the voltage U.
  • individual optical elements 25 can be formed by the optical structure 200, which are distributed over at least part of the surface 102 of the light emission element 10 ', wherein these optical elements 25 a
  • the structure or shape of the material 20 or of the layer between the electrodes 21, 22 may be formed by impressing.
  • the structure may have a lens structure, in particular a microlens structure, or may be formed by a lens, as exemplified in FIGS. 2 a and 2 b.
  • the optical elements 25 are therefore lenses or microlenses in this case.
  • Fig. 2a a state is sketched in which no voltage U is applied to the electrodes 21, 22, in Fig. 2b, a further state in which a voltage U is applied.
  • the configuration can be such that a radius of curvature of the corresponding lenses changes as a function of the voltage U, for example becomes smaller with increasing voltage U. Said change in shape of the optical structure 200 causes a change in the vertical extent of the optical structure 200. This process is reversible and, on removal of the applied voltage U, leads to a regression in the region sketched in FIG. 2a
  • the optical structure 200 is formed very flat, so that the
  • Total light module can be executed with a low overall height.
  • the optical structure 200 has a smaller vertical
  • Light-emitting element 10 '- has as the carrier element 10th
  • the optical structure 200 may be formed as a film or a thin layer.
  • the microlenses used in this embodiment increase their focal length upon application of the voltage U. This is indicated by arrows in Figs. 2a and 2b the optical elements 25 indicated.
  • the second electrode 22 runs quasi-parallel to the first electrode 21.
  • an increase in the coupling-out efficiency can be achieved by reducing total reflections between the light emission element 10 'and the air adjacent in the outer space in comparison with the known light module mentioned above.
  • the value of the refractive index for air HL is 1.0; for the material of the
  • the value of the refractive index nj is typically between 1.0 and 1.5.
  • the optical structure 200 is designed such that the electrodes 21, 22 and / or the material 20 each have a refractive index ns, for which ni ⁇ ns ⁇ nj.
  • trapezoidal elements are used as the optical elements 25 instead of the microlenses in cross section.
  • the optical elements 25 accordingly form prisms; the material 20 thus has one
  • Prismatic structure in particular a Mifaoprismenstmktur on.
  • the directed orientation of the second electrode 22 leads to a convolution of the coupled-out light toward the flat edge of the trapezium a side lighting can be used.
  • the optical elements 25 may, for example, also be formed by pyramidal elements or scattering centers.
  • the first electrode 21 is not arranged directly on the light-emitting element 10 ', but-preferably directly-on the further optical structure 30 or the intermediate layer. In this way, a further reduction of the total reflections between the
  • the further optical structure 30 may in particular be a lens structure or
  • a corresponding further optical structure 30 can also be used in conjunction with the first exemplary embodiment, that is to say with optical lenses designed as microlenses
  • Elements 25 or other optical elements are used.
  • the structure formed by the material 20 may be in
  • different areas or subregions of the surface 102 may be formed differently. For example, it may have microprisms in a first region of the surface 102 and micro-lenses in a second region or microprisms of a first orientation in a first region and microprisms of a second orientation in a second region which differs from the first orientation and the like. s. w. In this way, in particular very different directional properties of the light emitted by the light module can be effected.
  • the active or variable optical structure 200 may advantageously over the entire surface of the light module or over the entire surface 102 of the Light emitting element 10 'extend. Alternatively it can be provided that the active or variable optical structure 200 extends only over a partial area of the surface of the lighting module or only over a partial area of the surface 102 of the light emitting element 10 '. This also makes special
  • FIGS. 5a and 5b show an embodiment with a further embodiment
  • the optical structure 200 is embodied such that the second electrode 22 extends only over part of the material 20, hereinafter referred to as "active region" 26.
  • the described variable directional influence is therefore limited to the active region 26 in this case.
  • Fig. 6a is a corresponding plan view of the surface 102 of the
  • Light emitting element 10 'outlined.
  • only one area of the surface 102 is provided with the second electrode 22, so that this area forms the active area 26.
  • the remaining area of the surface 102 may, for example, be covered only with the first electrode 21 and the material 20, as shown by way of example in FIGS. 5a and 5b.
  • the material 20 may also have a microlens structure or other structure in the region not covered by the second electrode 22, so that a region which can not be influenced or changed by the voltage U is in this region optical effect can be achieved.
  • the second electrode 22 preferably extends for easier electrical contacting to the edge region of the surface 102. This may be configured, for example, by a corresponding "web" 28.
  • electrostatic forces are effective the variable voltage U is dominant, not one
  • the web 28 is preferably designed such that the voltage drop across the web 28 is not greater than 10%.
  • the width of the web 28 advantageously extends over at least three to five optical elements 25 to ensure a good continuous supply line.
  • FIGS. 7a and 7b Another example is sketched accordingly in FIGS. 7a and 7b.
  • a subregion of the surface 102 is designed as an active region 26, although, for example, no micro-lenses, but microprisms are provided as optical elements 25.
  • the remaining area of the surface 102 may, for example, be formed without the optical structure 200, so that, viewed in plan view, the corresponding area of the surface 102 of the
  • Light emitting element 10 can be seen.
  • the remaining region can be covered, for example, with the further optical structure 30, which, of course, can also extend in the aforementioned sense over the active region 26, under the corresponding optical elements 25.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

L'invention concerne un module lumineux comprenant un élément actif (12) en forme de plaque, et un élément support (10) qui est en forme de plaque et présente une surface (101) sur laquelle est disposé l'élément actif (12). Le module lumineux présente également un élément émetteur de lumière (10') transparent qui est, de préférence, formé par l'élément support (10). Au moins une partie d'une surface (102) de l'élément émetteur de lumière (10') est pourvue d'une structure (200) optiquement active ou variable. Cette structure peut, par exemple, présenter deux électrodes et un matériau intermédiaire, la forme de la structure (200) variant en fonction d'une tension appliquée aux électrodes. La structure optique (200) permet d'agir de manière ciblée sur la distribution directionnelle de l'émission de la lumière générée par l'élément actif (12). En d'autres termes, cela permet de contrôler de manière ciblée la caractéristique de rayonnement. Ainsi, le module lumineux est particulièrement adapté à la réalisation d'un éclairage directionnel, par exemple, pour éclairer des objets.
PCT/EP2012/063559 2011-07-12 2012-07-11 Module lumineux doté d'un élément de guidage de lumière contrôlable WO2013007744A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12737252.2A EP2732482A1 (fr) 2011-07-12 2012-07-11 Module lumineux doté d'un élément de guidage de lumière contrôlable
CN201280034300.0A CN103718322B (zh) 2011-07-12 2012-07-11 具有可控光导向功能的发光模块

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011079012.8 2011-07-12
DE102011079012A DE102011079012A1 (de) 2011-07-12 2011-07-12 Leuchtmodul mit steuerbarer Lichtlenkung

Publications (1)

Publication Number Publication Date
WO2013007744A1 true WO2013007744A1 (fr) 2013-01-17

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ID=46545359

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/063559 WO2013007744A1 (fr) 2011-07-12 2012-07-11 Module lumineux doté d'un élément de guidage de lumière contrôlable

Country Status (4)

Country Link
EP (1) EP2732482A1 (fr)
CN (1) CN103718322B (fr)
DE (1) DE102011079012A1 (fr)
WO (1) WO2013007744A1 (fr)

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WO2017064942A1 (fr) * 2015-10-13 2017-04-20 国立大学法人東京大学 Dispositif de commande de position de faisceau lumineux

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DE102014221926A1 (de) * 2014-10-28 2016-04-28 Tridonic Gmbh & Co. Kg OLED-Anordnung zur Lichtabgabe
DE102015112522A1 (de) * 2015-07-30 2017-02-02 Osram Oled Gmbh Organische Leuchtdiode und Betriebsverfahren für eine organische Leuchtdiode
FR3056497A1 (fr) * 2016-09-28 2018-03-30 Valeo Vision Dispositif d'eclairage interieur variable pour vehicule
CN112133813B (zh) * 2020-09-24 2021-11-16 京东方科技集团股份有限公司 显示面板、显示装置及电子设备

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Publication number Publication date
CN103718322B (zh) 2016-08-17
DE102011079012A1 (de) 2013-01-17
CN103718322A (zh) 2014-04-09
EP2732482A1 (fr) 2014-05-21

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