EP2936580A2 - Module d'éclairage à oled ou qled - Google Patents

Module d'éclairage à oled ou qled

Info

Publication number
EP2936580A2
EP2936580A2 EP13811869.0A EP13811869A EP2936580A2 EP 2936580 A2 EP2936580 A2 EP 2936580A2 EP 13811869 A EP13811869 A EP 13811869A EP 2936580 A2 EP2936580 A2 EP 2936580A2
Authority
EP
European Patent Office
Prior art keywords
light
light module
module according
active element
optical element
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.)
Withdrawn
Application number
EP13811869.0A
Other languages
German (de)
English (en)
Inventor
Michael Eritt
Christian Kirchhof
Tino Göhler
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.)
Tridonic GmbH and Co KG
Original Assignee
Tridonic GmbH and 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 Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Publication of EP2936580A2 publication Critical patent/EP2936580A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • 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
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • 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
    • 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
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the present invention relates to a lighting module according to the preamble of
  • Claim 1 which has a plate-shaped active element for emitting light, wherein the active element may be in particular a so-called OLED or QLED.
  • OLEDs organic light-emitting diodes
  • QLEDs Quantum Dots Light Emitting Diodes
  • the so-called active element formed by the OLED is arranged on a plate-shaped substrate.
  • encapsulation usually takes place, that is, the active element is not only covered on its two flat sides of a substrate or other planar elements but also enclosed in its edge region accordingly. This can be achieved, for example, by virtue of the fact that the substrate has a slight depression, in which the OLED is then arranged.
  • the present invention is therefore based on the task, a further development of previously known lighting modules based on OLEDs or Specify QLEDs, where as possible over the entire extent of the light module across a light output can be achieved.
  • the light module according to the invention initially corresponds in terms of its structure to a classic light module based on OLED or QLED. That is, that
  • Light module initially has a plate-shaped, active element, which may be formed in particular by an OLED or QLED. Further, a plate-shaped, translucent support member is provided, with a surface on which the active element is arranged, wherein the support member having a protruding with respect to the active element edge region.
  • an additional optical element is now arranged on the side of the carrier element opposite the active element, which is designed to form a light-emitting surface of the lighting module, the light-emitting surface caused by the optical element being widened relative to the surface of the active element ,
  • the area over which the light emission of the light module ultimately takes place is increased in comparison with the active element, ideally the light exit surface being the maximum
  • a light module which has a plate-shaped, active element, which is formed in particular by an OLED or QLED, and a plate-shaped, translucent support member having a surface on which the active element is arranged, wherein the support member with a reference has on the active element protruding edge region.
  • the light-emitting module according to the invention is characterized by an optical element which is arranged on a side of the carrier element opposite the active element and designed to form a light-emitting surface of the light-emitting module which is widened in relation to the surface of the active element, preferably with respect to its extension of the surface of the light-emitting element Carrier element corresponds.
  • the optical element according to the invention is preferably formed plate-like and with a the carrier element facing the light entry surface and the
  • the light emitting surface preferably has a greater extent than that
  • the light entry surface of the optical element substantially corresponds in terms of its extent to the surface of the active element.
  • the optical element is thus seen in the transverse direction is a kind of light guide, which distributes the light entering via the carrier element in the surface and then radiates over the light emitting surface.
  • the optical element in cross-section for example, be formed trapezoid or truncated cone.
  • the flat sides of the optical element are connected to each other via side or edge regions which at least partially have a curvature.
  • the side portions of the optical element, which connect the two flat sides with each other, have a reflective effect, either by a suitable choice of the angle such that here
  • Total reflection occurs, or can be achieved by the application of a reflective coating.
  • a diffuser layer is arranged between the carrier element and the optical element.
  • the light exit surface of the optical element according to the invention may additionally be provided with a light-influencing structure, which may be either a scattering structure or a refractive structure, for example a prism structure or the like.
  • structuring of the active element may also be provided in order to further improve the light output. Because of the current density distributions that result during the operation of OLEDs or QLEDs, it often happens that there is one
  • the active element is therefore provided to structure the active element or to divide it into a plurality of luminous and non-luminous regions, wherein preferably the luminous regions are controlled uniformly.
  • the effect can then be achieved that the middle Luminance at the edge of the average luminance in the central region of the active element corresponds.
  • the density of the luminous areas in the central area in which usually in a completely homogeneous or
  • Another way to further improve the uniformity of the brightness of the active element is to divide it into at least two separately controllable areas. In this case, the subdivision can be carried out in such a way that a central region and an edge region which can be controlled separately therefrom are present, wherein in turn luminance density can be compensated for by appropriate activation of both regions.
  • Figure 1 is a sectional view of the structure of a conventional
  • Light module based on OLED or QLED
  • Figure 2 shows a first exemplary embodiment of an inventive
  • Light module 1 OLED-based, the structure and the inventive solution are identical in a QLED light module.
  • a carrier element of the lighting module 1 is a plate-shaped substrate 10 made of a translucent material.
  • the active element 20 is arranged on the substrate 10, that is to say the actual OLED with the layer consisting of an organic material which emits light when a suitable voltage is applied. At the opposite side of the substrate 10 is then again
  • Covering element 30 is arranged, which may be formed by a cover glass or possibly also by an opaque material. This cover member 30 protects the active element 20 on its back against external influences.
  • the active element 20 is also protected on its peripheral area, which - as shown - can be done for example by the fact that the substrate 10 has a slightly raised protruding edge region. As a result, a flat recess is formed in the surface of the substrate 10, in which the active element is embedded 20 so that it is ideally completely protected by the substrate 10 and the cover glass 30. Not shown in this case, the necessary leads for contacting the electrode layers of the active element 20, which, however, play no essential role for the present invention. As an alternative to the solution shown, the active element 20 could also be protected by a separate frame-like sheath.
  • the light output of the module 1 via the substrate 10 according to the arrows shown schematically.
  • the light 40 thus penetrates the substrate 10, but at the interface 50 between the substrate 10 and the
  • FIG. 2 A first embodiment for this purpose is shown in Figure 2, wherein the inventively provided additional optical element 60 is formed by a trapezoidal in cross section formed prism.
  • This prism has a beveled edge 70 in the edge region or over the circumference, which - as shown schematically by the light beams 80 - acts totally refiecting at light angles entering the prism 60 at shallow angles.
  • the Refietation at the peripheral edge 70 a deflection of these light beams is achieved so that they now meet at a new angle to the Lichtabstrahl Structure 50 of the optical element 60, which allows them to leave this.
  • optical element 60 thus not only has the consequence that the normally refracted at the interface of the substrate 10 light rays, which would usually be lost, can now be used in addition to the light output and accordingly the efficiency of the light module 1 is increased, but also that the area over which light is emitted is increased.
  • the optical element 60 can thus a
  • Lichtabstrahlfiamba be achieved, which corresponds in terms of their extent to the surface of the substrate 10. This means that light is emitted even in the edge regions of the light module 1 and, accordingly, in the case where a plurality of light modules 1 are arranged next to one another in a planar manner
  • the optical element 60 or the prism is optically coupled to the substrate 10 in such a way that no influence occurs during the transition of the light beams from the substrate 10 into the optical element 60.
  • FIG. 3 A further development of the basic principle according to the invention is shown in FIG. 3, wherein here the light emission surface 50 of the optical element 60 is provided with an additional structure 90 or layer. It can be a diffuser structure 90 or even a microprism structure, by which the light output is further improved.
  • the use of the additional optical element 60 results in different light exit angles at the surface 50 of the prism 60, with the result that a somewhat different emission characteristic could exist in the edge region of the light exit surface 50 compared to an area directly above the active element 20 , Accordingly, the edge region would still be easily perceivable from different angles, although this effect is now compensated for by the use of the additional structure 90.
  • a reflective layer 100 can additionally be additionally be additionally provided on the peripheral or edge region of the optical element 60.
  • the edge region 70 of the optical element does not have to be tuned to the required total reflection angle, but can-as will be shown in more detail below-be designed in a very different manner.
  • the height of the optical element 60 can be reduced by this measure, so that the entire structure of the light module 1 can be made very flat.
  • the additionally reflecting layer 100 can have both a diffusely scattering and a specular behavior.
  • an additional diffuser layer 110 can be introduced in the transition region between substrate 10 and optical element 60. Due to the property of OLEDs, light with different color locations is partially preferred in different
  • the problem could arise that the edge region of the optical element 60 partially emits light of a different color. Again, this effect is compensated or compensated by the diffuser layer 110, so that ultimately a uniform, homogeneous light output over the entire surface of the optical element 60 is achieved.
  • FIG. 6 An additional possibility for further improvement of the light output is shown in FIG. 6, wherein the development explained below can in turn be combined with all measures described above.
  • the active element 20 does not form a closed surface, as previously, which is controlled uniformly. Instead, the active element 20 is structured such that it is divided in its area into a plurality of luminous areas 20a and non-luminous areas 20b.
  • Structuring can be done by a corresponding matrix, wherein the luminous areas 20a, however, preferably again are controlled uniformly.
  • a corresponding structuring of the surface esp. A suitable choice of the density of the luminous areas 20 a now the uniformity of the
  • Light emission can be further improved.
  • the reason for this measure is that with OLEDs or QLEDS partly due to corresponding current density distributions, a different luminance within the luminous area occurs.
  • an OLED often shines less brightly in a central region of the surface than at the edge, which is attributable inter alia to the non-optimal conductivity of the transparent electrode layers of the OLED used.
  • This effect is now compensated for in the development according to FIG. 6 in that the density of the illuminated areas is increased in those areas in which a lower luminance would normally be present. As can be seen from the illustration of FIG.
  • the active element 20 is subdivided into a plurality of regions which can be controlled separately from one another and to control these regions in such a way that uniform brightness is again present.
  • This idea is indicated in FIG. 5, it being provided here that the active element 20 is subdivided into a central region 20c and a frame-like edge region 20d. Both areas 20c and 20d can, as already mentioned, be controlled separately from each other, wherein now again the control is selected such that viewed over the entire area away there is a uniform as possible brightness.
  • This variant can also be combined with the additional optical measures mentioned above.
  • FIGS. 7a to 7f show conceivable variants for the design of the edge region, the basic advantage being that incident light beams are deflected in such a way that they can leave the light emission surface of the optical element 60 in its edge region.
  • Some of the edge areas are characterized by being relatively simple others allow a slightly better control of the deflection of the light rays.
  • the efficiency and quality of the light output in a light module are significantly optimized by the inventive measures.
  • lighting modules can be created, which emit light homogeneously to the edge region, so that in particular several such modules can be combined flat with each other to realize a large-area lichtabstrahlende arrangement.
  • the concept according to the invention is applicable both to OLED lighting modules and to QLED lighting modules.

Landscapes

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

Abstract

L'invention concerne un module d'éclairage (1) pourvu d'un élément actif (20) en forme de plaque, lequel est réalisé en particulier par une OLED ou une QLED, et d'un élément de support (10) en forme de plaque, transparent et pourvu d'une surface sur laquelle l'élément actif (20) est disposé. L'élément de support (10) comporte une zone de bord en saillie par rapport à l'élément actif (20). Avec ce module, un élément optique (60) est disposé sur une face de l'élément de support (10) opposée à l'élément actif (20) et est réalisé pour former une surface d'émission de lumière (50) du module d'éclairage (1), laquelle est élargie par rapport à la surface de l'élément actif (20).
EP13811869.0A 2012-12-20 2013-12-16 Module d'éclairage à oled ou qled Withdrawn EP2936580A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012223967.7A DE102012223967A1 (de) 2012-12-20 2012-12-20 OLED/QLED-Leuchtmodul
PCT/EP2013/076693 WO2014095713A2 (fr) 2012-12-20 2013-12-16 Module d'éclairage à oled ou qled

Publications (1)

Publication Number Publication Date
EP2936580A2 true EP2936580A2 (fr) 2015-10-28

Family

ID=49880722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13811869.0A Withdrawn EP2936580A2 (fr) 2012-12-20 2013-12-16 Module d'éclairage à oled ou qled

Country Status (5)

Country Link
US (1) US20150369453A1 (fr)
EP (1) EP2936580A2 (fr)
CN (1) CN105144419A (fr)
DE (1) DE102012223967A1 (fr)
WO (1) WO2014095713A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105244451B (zh) * 2015-10-16 2018-08-14 Tcl集团股份有限公司 一种具有混合htl的量子点发光二极管及其制备方法
DE102016215265A1 (de) * 2016-08-16 2018-02-22 Mahle International Gmbh Herstellungsverfahren eines Wärmeübertragerrohres
TWI641126B (zh) 2017-12-04 2018-11-11 友達光電股份有限公司 畫素結構

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6661029B1 (en) * 2000-03-31 2003-12-09 General Electric Company Color tunable organic electroluminescent light source
JP2005353564A (ja) * 2004-05-14 2005-12-22 Toyota Industries Corp 照明装置
EP1768463A4 (fr) * 2004-05-17 2011-04-13 Zeon Corp Élément électroluminescent, équipement d'éclairage et dispositif d'affichage
JP2005327686A (ja) * 2004-05-17 2005-11-24 Nippon Zeon Co Ltd エレクトロルミネッセンス素子、並びにこれを用いた照明装置および表示装置
JP2006156205A (ja) * 2004-11-30 2006-06-15 Meiki Plastics Co Ltd 発光装置及び発光装置用反射部材
US7928537B2 (en) * 2006-03-31 2011-04-19 Fujifilm Corporation Organic electroluminescent device
JP2007294441A (ja) * 2006-03-31 2007-11-08 Fujifilm Corp 機能素子
DE102007058453A1 (de) * 2007-09-10 2009-03-12 Osram Opto Semiconductors Gmbh Strahlungsemittierende Vorrichtung
JP5140368B2 (ja) * 2007-10-01 2013-02-06 ローム株式会社 照明装置
US8622562B2 (en) * 2010-12-23 2014-01-07 Universal Display Corporation 3D light extraction system with uniform emission across
DE102011079797A1 (de) * 2011-07-26 2013-01-31 Ledon Oled Lighting Gmbh & Co. Kg OLED/QLED-Leuchtmodul mit gleichmäßigem Erscheinungsbild

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
DE102012223967A1 (de) 2014-06-26
CN105144419A (zh) 2015-12-09
US20150369453A1 (en) 2015-12-24
WO2014095713A3 (fr) 2014-08-14
WO2014095713A2 (fr) 2014-06-26

Similar Documents

Publication Publication Date Title
DE102016116269B4 (de) Organische-licht-emittierende-diode-anzeigevorrichtungen
EP2130072B1 (fr) Système comprenant une puce semi-conductrice et une couche de guidage de la lumière
DE10102585A1 (de) Farbige Beleuchtungseinrichtung
DE102015122343B4 (de) Led-lichtquelle, hintergrundbeleuchtungsmodul und flüssigkristallanzeigevorrichtung
EP1231430A1 (fr) Dispositif d'illumination avec sources de lumière ponctuelles
EP1647061A1 (fr) Element luminescent
DE202008017887U1 (de) Planare Lichtquelle und LCD-Hinterleuchtungseinheit mit einer solchen planaren Lichtquelle
DE102006003134A1 (de) Planare Lichtquelleneinheit
DE102010018030A1 (de) Flächenlichtquelle
DE102011003243A1 (de) Leuchte mit diffuser und gebündelter Lichtabgabe
WO2014001046A1 (fr) Composant photoémetteur organique
DE102004046256A1 (de) Oberflächenleuchtsystem
EP2936580A2 (fr) Module d'éclairage à oled ou qled
EP2556287B1 (fr) Arrangement d'émission de lumière comprenant plusieurs sources de lumière et un élément diffuseur de lumière transparent
DE112016000829B4 (de) Lichtleitkörper, Lichtquellenvorrichtung und Bildlesevorrichtung
EP3212997B1 (fr) Élément optique ainsi qu'ensemble d'émission de lumière comprenant un élément optique
DE10164033B4 (de) Optoelektronisches Bauelement mit einer Mehrzahl von Lichtquellen
DE202005001507U1 (de) Oberflächenleuchtsystem
DE102011087543A1 (de) Optoelektronische anordnung
DE102012104148A1 (de) Optoelektronisches Halbleiterbauelement mit einem optischen Diffusorelement und Verfahren zum Herstellen eines derartigen Halbleiterbauelements
WO2014125115A1 (fr) Optique pour source lumineuse del
EP2713397B1 (fr) Dispositif optique et un dispositif d'éclairage avec un dispositif optique
DE102021116840A9 (de) Lichtmodul, insbesondere für eine Beleuchtungseinrichtung eines Fahrzeuges, und Beleuchtungseinrichtung eines Fahrzeuges
EP3359874B1 (fr) Dispositif d'émission de lumière
DE202024100876U1 (de) Lichtquellenmodul

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150611

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20190326

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20200701