WO2009040724A2 - Système de fenêtre associant des fonctionnalités de fenêtre et d'éclairage - Google Patents

Système de fenêtre associant des fonctionnalités de fenêtre et d'éclairage Download PDF

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Publication number
WO2009040724A2
WO2009040724A2 PCT/IB2008/053848 IB2008053848W WO2009040724A2 WO 2009040724 A2 WO2009040724 A2 WO 2009040724A2 IB 2008053848 W IB2008053848 W IB 2008053848W WO 2009040724 A2 WO2009040724 A2 WO 2009040724A2
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WO
WIPO (PCT)
Prior art keywords
window
light
optical element
organic light
transparent
Prior art date
Application number
PCT/IB2008/053848
Other languages
English (en)
Other versions
WO2009040724A3 (fr
Inventor
Hans P. Loebl
Herbert F. Boerner
Claudia M. Goldmann
Original Assignee
Philips Intellectual Property & Standards Gmbh
Koninklijke Philips Electronics N.V.
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 Philips Intellectual Property & Standards Gmbh, Koninklijke Philips Electronics N.V. filed Critical Philips Intellectual Property & Standards Gmbh
Publication of WO2009040724A2 publication Critical patent/WO2009040724A2/fr
Publication of WO2009040724A3 publication Critical patent/WO2009040724A3/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B2009/2464—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds featuring transparency control by applying voltage, e.g. LCD, electrochromic panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/44—Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers

Definitions

  • This invention relates to window systems for effective day and night illumination combining window and illumination functionalities, and to building systems comprising a multitude of window systems and to a method of operating such a window system.
  • OLEDs are promising, thin, large-area light sources, where the combination of a diffuse (or indirect) light emission and the large light emission area is very suitable for room illumination purposes.
  • US 6639357 discloses an OLED layer stack with transparent electrodes allowing the application of transparent OLEDs on windows, combining the window functionality of the transparent OLED-window system during daytime and the light-emitting capability of the OLED during nighttime.
  • a transparent OLED emits light to both sides of the window. Therefore only half of the light can be used to illuminate the inside of a room or a building. The light emitted to the outside can be considered as a kind of light pollution of the environment and is lost for room illumination purposes.
  • a window system comprising a stack of elements arranged in any order: a transparent window element, a transparent organic light-emitting element comprising at least one organic light emitting layer arranged between electrodes to emit artificial light and - a optical element, where the optical element is an reflective element or an absorbing element, comprising at least one functional layer arranged between switching electrodes, which is electrically switchable between a transparent mode in order to enable the transmission of window light through the window system and a o reflective mode if the optical element is the reflective element in order to reflect at least an essential part of the artificial light emitted towards the optical element, or o an absorbing mode if the optical element is the absorbing element in order to absorb at least an essential part of the artificial light emitted towards the optical element.
  • a window element may be a complete window or a part of a window pane.
  • the window element may comprise one or more window panes, such as for example double windows.
  • the Term “window” denotes transparent panes for any kind of window functionality (window function), e.g. windows in facades of buildings or windows in doors, walls, roofs etc to transmit daylight and/or light emitted by any other light source.
  • window light denotes any kind of light not emitted from the organic light emitting element, e.g daylight from the outside or light emitted by another light source apart from the window system.
  • artificial light denotes the light emitted by the organic light-emitting element within the window system.
  • the material of the transparent substrate can be any transparent material suitable for the application in windows, e.g. glass, plastic etc.
  • transparent organic light- emitting element denotes the complete layer stack necessary to operate an OLED, the materials within the OLED stack being transparent, e.g. transparent indium- tin-oxide (ITO) electrodes.
  • the optical element may be a reflective element or an absorbing element.
  • the term “reflective” denotes the reversal of the light direction, the incident angle being equal to the angle of reflection, in contrast to diffuse scattering.
  • the emitted artificial light can be mono-colored or multicolored light, depending on the applied organic light emitting material and the OLED layer stack, e.g. white light emitted by red-green-blue stacked OLEDs.
  • the term "absorbing” denotes the absorption of at least a part of the artificial light.
  • the optical element as an absorbing element may reduce the brightness of the artificial light transmitted through the absorbing element for the whole spectrum of the artificial light or for a part of the spectrum of the artificial light. In the latter case, an e.g. with light emitting OLED may be visible as a weak red emitting light source from the environment.
  • the mentioned color of light is only one example a can be any color depending on the light absorbing properties of the absorbing element.
  • the optical element as a reflective or absorbing element can be arranged on top of the transparent window element or on top of the transparent organic light- emitting element.
  • the optical element can be any optical element comprising at least one functional layer, which functional layer can be switched between both modes (firstly, transparent and reflective in case of the optical element as reflective element and secondly, transparent and absorbing in case of the optical element as an absorbing element) via an applied voltage to the switching electrodes.
  • the functional layer of the reflective element may be an electrochromic layer such as hydrogen containing WO 3 , NiO, Polyanilin (PANI) or magnesium-rich Ni-Mg layers, where the optical properties are changed between transparent and reflective by an applied electrical field and/or charge injection leading to a reversible reaction between a metallic or oxidic mode (e.g WO 3 ) and a hydride mode (e.g H x WO 3 ) or the function layer may be an electrophoretic foil comprising cavities which contain electrophoretically mobile particles, e.g aluminum particles or TiO 2 coated particles, suspended in a liquid, e.g a non-polar organic liquid such as paraffin oil or other oils.
  • electrochromic layer such as hydrogen containing WO 3 , NiO, Polyanilin (PANI) or magnesium-rich Ni-Mg layers, where the optical properties are changed between transparent and reflective by an applied electrical field and/or charge injection leading to a reversible reaction between a metallic or oxidic mode (e.g
  • the switching electrodes can be made of any transparent conducting materials, for instance ITO.
  • the reflectivity of electrochromic layers and of electrophoretic layers in the reflective mode are typically 60 - 80% and 60 - 90% of the incident visible light, respectively.
  • the transmission in the reflective mode is below 20%, in some cases close to 0%.
  • the transparent mode the reflectivity is strongly reduced, for example to values of about 20% while a transmission of up to 80% is obtainable.
  • the transparent mode of 70% transparency can be switched to a reflectivity of 70%.
  • the functional layer of the absorbing element may be any suitable electrochromic layer (organic polymers or inorganic compounds) changing its transparency from 60% up to more than 70% in the transparent mode to 25%, for more preferred electrochromic layers to less than 5% transmission in the absorbing mode.
  • the required operation voltage of such electrochromic layers is in the order of 0.5 - 5V.
  • the transparent window element is arranged between the optical element and the organic light-emitting element. This enables an individual, subsequent placement of optical and organic light-emitting elements (OLED element) onto the window element.
  • OLED element optical and organic light-emitting elements
  • Especially windows already equipped with OLED elements can be modified into the window system according to the present invention by adding the optical element on the other side of the window element.
  • the optical element is arranged between the transparent window element and the organic light-emitting element, or the organic light-emitting element is arranged between the optical element and the transparent window element.
  • the optical and organic light emitting elements may be glued together or prepared directly on top of each other.
  • the window system comprises at least two window panes (e.g. double pane window) arranged with a gap between the two window panes and wherein the optical element is arranged in the gap on one window pane and the organic light-emitting element is arranged in the gap on the other window pane facing towards the optical element.
  • the gap may be filled by the organic light-emitting element and the optical element. In other embodiments there may be a remaining gap between optical element and organic light-emitting element.
  • the gap may be filled with additional optical coupling layer(s), e.g. silicon layer, to obtain a good optical transition between organic light emitting element and optical element.
  • Both window panes may serve as an encapsulation of the organic light-emitting element, which is known to be sensitive to moisture and oxygen.
  • the window panes may be glued together in a gas- tight way via a seal (e.g. glass seal) fixing both panes essentially parallel to each other with a certain gap between both panes after providing a certain vacuum between the panes. Any other methods to decrease to amount of moisture and oxygen below a required level in order to obtain a sufficient life-time performance of the organic light- emitting element could also be applied by the skilled people.
  • the optical element and the organic light emitting element are connected in such a way as to obtain either no artificial light in the transparent mode of the optical element or artificial light in the reflective or absorbing mode of the optical element.
  • the window function is not disturbed by artificial light from the OLED, and during nighttime the artificial light is essentially not emitted to the environment. Therefore, any light pollution of the environment on the other side of the window element is essentially prevented.
  • the optical element as a reflective element, the artificial light is additionally essentially reflected back in one direction to improve the room illumination by the OLED element. Both can be achieved in an embodiment where one switching electrode of the optical element serves both as an anode or a cathode of the organic light-emitting element.
  • the double function of an electrode layer reduces the number of layers in a stacked layer system comprising an optical element and an organic light-emitting element.
  • the area size of the optical element exceeds the area size of the organic light-emitting element.
  • the illumination source can be varied from a more diffuse large-area light source to a more concentrated light source, e.g. for directed light beams or spot light beams.
  • additional layers with integrated optics to form a certain artificial light beam may be added to the window system.
  • the area size of the organic light-emitting element exceeds the area size of the optical element in order to illuminate also the other side of the window system. This may be advantageous in the case of indoor window systems serving as a combined room illumination and corridor illumination device.
  • the major part of the light is emitted by the organic light-emitting to one side of the window system to illuminate a room on this side (high brightness) and simultaneously the minor part of the light is transmitted through the window system to the other side of the window system for instance to illuminate a corridor (low brightness).
  • a reflective element as the optical element, the light reflected back to the side, where the room should be illuminated will enhance the brightness of the room illumination, because no light is absorbed. People skilled in the art may also consider other applications using such a window system.
  • the window system further comprises a light scattering element arranged on top of the side of the organic light-emitting element facing away from the optical element in order to enhance the light out-coupling from the organic light-emitting element to the environment.
  • the light scattering element is switchable between a transparent mode and a light scattering mode in order to fully maintain the window function (transparency) of the window system.
  • the window system further comprises a control unit to switch at least the transparent organic light-emitting element and the optical element in response to a received signal.
  • the signal may be a signal originating from a clock, a brightness (day/night sensor) sensor, a remote control, a computer, a cell phone, an internet connection or any other suitable devices.
  • This invention further relates to a building system comprising a multitude of window systems according to claim 1, characterized in that the building system further comprises a building control unit to switch the transparent organic light- emitting element and the optical element of different window systems simultaneously or separately.
  • building facades comprising a multitude of window systems or a number of doors in a corridor equipped with window systems can be operated simultaneously in the same mode (reflective/transparent or absorbing/transparent and/or light emitting / non-light emitting).
  • the same is possible for some of the window systems of the building facades and/or indoor applications such as doors in a corridor. People skilled in the art may also consider additional applications, where more than one window systems may be operated simultaneously.
  • This invention further relates to a method of operating a window system according to claim 1, characterized in that the following steps: switching on the organic light emitting element in order to emit artificial light and switching the optical element to the reflective or absorbing mode are performed simultaneously.
  • the method further comprises the steps: - switching off the organic light emitting element and switching the optical element to the transparent mode, which steps are performed simultaneously.
  • Fig-1 window system comprising an optical element, window element and organic light-emitting element shown in a side view: (a) only window light (b) and (c) artificial light emitted by the organic light emitting-element.
  • Fig.2 window system comprising a window element, optical element and organic light-emitting element shown in a side view: (a) only window light (b) and (c) artificial light emitted by the organic light emitting-element.
  • Fig.3 window system comprising an optical element, organic light- emitting element and window element shown in a side view: (a) only window light (b) and (c) artificial light emitted by the organic light emitting-element.
  • Fig.4 window system with electrodes and functional layers, shown in a side view.
  • Fig.5 another embodiment of the window system with electrodes and functional layers, shown in a side view.
  • Fig.6 window system shown in a top view with more than one organic light-emitting element and different area sizes of optical and OLED elements.
  • Fig.7 window system shown in a top view with an area size of the optical element exceeding the area size of the organic light- emitting element.
  • Fig.8 window element with additional scattering element: (a) only window light (b) artificial light emitted by the organic light emitting-element.
  • Fig.9 building system operating multiple window systems.
  • Fig.10 window system shown in a side view comprising an optical element, an organic light-emitting element and a sealed window element with two window panes
  • the organic light emitting element comprises a number of stacked layers.
  • the OLED layer stack comprises at least a light-emitting organic layer arranged between two electrodes (anode and cathode). Usually, one electrode is transparent and the other electrode is reflective. In the case of the present invention, both electrodes have to be transparent.
  • a known transparent electrically conductive material is Indium- Tin-Oxide (ITO).
  • ITO Indium- Tin-Oxide
  • the OLED may comprise additional organic layers between the electrodes such as electron and/or hole conducting layers, electron and/or hole injection layers or several different light-emitting layers emitting light of a different color instead of one light-emitting layer.
  • color denotes emitted light within a certain wavelength range, resulting in a certain color of the emitted light.
  • suitable organic materials are known which enable an OLED layer stack emitting light of a desired color and/or brightness to be obtained.
  • the optical element can be any reflective or absorbing element comprising at least one functional layer, which functional layer can be switched between both modes (transparent / reflective or transparent / absorbing) via a voltage applied to the switching electrodes such as electro-chromic elements, gas-chromic elements or photo-chromic elements.
  • the electro-chromic element consists of a WOx layer and redox electrolytes such as Lithium-Iodide.
  • the functional layer may be an electro-chromic layer such as hydrogen containing WO 3 , NiO, Polyanilin (PANI), Gd-Mg or magnesium-rich Ni-Mg layers, where the optical properties are changed between transparent and reflective or absorbing by an applied electrical field and/or charge injection leading to a reversible reaction between a metallic or oxidic mode (e.g WO 3 ) and a hydride mode (e.g H x WO 3 ) or the functional layer may be an electrophoretic foil comprising cavities which contain electrophoretically mobile particles, e.g aluminum particles or TiO 2 coated particles, suspended in a liquid, e.g a non-polar organic liquid such as paraffin oil or other oils.
  • electro-chromic layer such as hydrogen containing WO 3 , NiO, Polyanilin (PANI), Gd-Mg or magnesium-rich Ni-Mg layers, where the optical properties are changed between transparent and reflective or absorbing by an applied electrical field and/or charge injection leading to a reversible reaction
  • the switching electrodes can be made of any transparent conducting materials, for instance ITO.
  • the reflectivity of electro-chromic layers and of electrophoretic layers in reflective mode are typically 60 - 80% and 60 - 90% of the incident visible light, respectively.
  • the transmission in the reflective mode is below 20%, in some cases close to 0%.
  • the reflectivity is strongly reduced, for example to values of about 20% while a transmission of up to 80% is obtainable.
  • Figs.l, 2 and 3 show different embodiments of the window system according to the present invention, where (a) denotes the window system in a transparent and non-light emitting mode, (b) denotes the window system in a reflective and light-emitting mode and (c) denotes the window system in an absorbing and light- emitting mode.
  • the window system is operated with the optical element in the reflective or absorbing mode and the light-emitting element in the non-light emitting mode as well as the optical element in the transparent mode and the light-emitting element in the light emitting mode are not shown here.
  • the window element 1, the organic light-emitting element 2 and the optical element 3 can be arranged differently.
  • the window element 1 is arranged between optical element 3 and organic light-emitting element 2.
  • the optical element 3 is arranged between window element 1 and organic light-emitting element 2.
  • the organic light-emitting element 2 is arranged between optical element 3 and window element 1.
  • the window system is transparent to window light 4, which can be sunlight or light emitted by another light source outside the window system, for example outdoor or indoor illumination.
  • the organic-light emitting element 2 emits artificial light 51 and 52, the artificial light 51 being emitted from the OLED directly to one side of the window system and the artificial light 52 being originally emitted in the opposite direction and essentially reflected back in the other direction by the reflective element 3 enhancing the brightness of the artificial light emitted to the light-emitting side of the window system.
  • both artificial lights 51 and 52 have to pass the window element (Fig.3). If the window element 1 is arranged between OLED 2 and reflective element 3a, only artificial light 52 has to pass the window element 1 before being reflected by the reflective element 3a.
  • Fig. 3 the window element 1 and reflective element 3a
  • the refractive indices of OLED 2 and window element 1 are adapted in order to minimize the amount of light being reflected back at the interface between window element 1 and OLED element 2 due to total refection.
  • the adjustment of the refractive indices may be achieved by introducing additional transparent layers with refractive indices between the refractive indices of both elements 1 and 3.
  • Fig 4 shows an embodiment of the window system according to the present invention, where the window element 1 is arranged between optical element 3 and OLED 2. The two latter elements are equipped with two electrodes 32 and 22 each.
  • the electrodes 22 and 32 are connected via electrical connections 220 and 320 to power supplies 62 and 63 applying operating voltages U L1 and U L2 to the OLED 2 and operating voltages U R1 and U R2 to the optical element 3 in order to enable the emission of light and to switch between the reflective or absorbing mode and the transparent mode, respectively.
  • the functional layers are denoted as 21 (light emitting layer, OLED 2) and 31 (reflective/transparent layer or absorbing/transparent layer of optical element 3).
  • Fig.5 shows another embodiment, where the optical element 3 and the organic light-emitting element (OLED) 2 are arranged directly on top of each other.
  • one of the electrodes 32a of the layer stack of the optical element 3 simultaneously serves as one of the electrodes 22a of the layer stack of the organic light-emitting element 2.
  • the window element indicated in Fig.5 by dashed lines, is either on top of the OLED 2 or on top of the optical element 3.
  • the formally simultaneously used electrode 22a, 32a is separated into two sub electrodes 22a and 32a with a barrier layer in between, e.g. a SiO 2 layer.
  • a barrier layer in between, e.g. a SiO 2 layer.
  • the area sizes of optical elements 3 may be larger than the area sizes of the organic-light emitting elements 2, as shown in Fig.6.
  • One window system 10 may comprise one or more organic light-emitting elements 2 of the same or different shape and size, as shown in Fig.6.
  • one of the OLEDs 2 may be additionally equipped with optical structures to emit a focused or aligned light beam in order to spotlight an object, e.g. a part of a table etc.
  • the area size of the organic light-emitting element 2 may exceed the area size of the optical element 3.
  • the window system 10 will emit artificial light 51 to both sides of the window system 10 in the areas of the window system 10 where no optical element 3 is present (here in the area close to the edge of the window system as an example). This effect can be used to simultaneously illuminate one side of the window system 10 with high brightness
  • optical and organic light-emitting elements can be adapted by a suitable ratio of the area sizes of optical and organic light-emitting elements. Skilled people may choose other geometrical ratios between optical and organic light-emitting elements depending on the individual application.
  • the window system 10 additionally comprises a light- scattering element 7 arranged at the interface between window system 10 and the environment.
  • the light- scattering element 7 may be used to enhance the light out-coupling efficiency of the window system 10.
  • the light- scattering element 7 may be electrically switchable with an operating voltage Us 1 , Us 2 between a scattering mode (Us 2 ) and a transparent mode (Us 1 ).
  • the modes of the light scattering element 7 may be also controlled by the power control unit 6 also controlling the voltages applied to optical element (here: reflective element 3b) and organic light-emitting element 2.
  • the elements 2, 3 and 7 may be controlled and switched separately. Electrically switchable elements 7 are commercially available.
  • Suitable scattering elements 7 comprising materials/layers suitable to be operated within the above described window system 10.
  • the optical element shown in Fig.8 is an reflective element 3b, but in other embodiments it could also be an absorbing element 3b instead of an reflective element 3a.
  • a building system 11 comprises a multitude of window systems 10, which are controlled by a building control unit 111.
  • the building control unit 111 may comprise one or more window control units to apply the desired voltages to switch the individual window systems 10 to the desired mode.
  • the building control unit may transmit the desired mode to the window systems 10, which each comprise a separate window control unit 6.
  • the building system may be adapted to operate window systems 10 in a number of rooms, on a floor, in a complete building, a building facade or to operate more than one building.
  • One example of the inventive window system Layer / thickness: window pane, e.g. glass pane
  • ITO layer 120nm electrochromic layer / stack (transparent / reflective or absorbing)
  • ITO layer 120nm SiO2 barrier layer, lOOnm ITO layer, 120nm n-doped layer electron transport layer organic green light emitting layer organic red light emitting layer hole transport layer charge generation layer electron transport layer organic blue light emitting layer hole transport layer hole injection layer ITO layer, 120nm
  • the window element 1 comprises two window panes Ia, Ib, where the organic light- emitting element 2 and the optical element 3 are arranged between the both window panes Ia, Ib on the inner surfaces of the two window panes facing together.
  • This arrangement simultaneously serves as an encapsulation (Ia, 12, Ib, 12) for the organic light-emitting element 2, which is sensitive to moisture and oxygen.
  • the two window panes Ia, Ib are sealed together in a gas-tight way with an appropriate seal 12 establishing a gap 13 between the window panes Ia, Ib sufficient for previously preparing optical element 3 and organic light-emitting element 2 onto the inner surfaces of window panes Ia and Ib.
  • the optical and organic light-emitting elements may be in direct contact or may be separated by a certain gap.
  • such a gap may be filled with an optical coupling layer (e.g. silicon) in order to prevent undesired optical transitions between optical element 3 and organic light-emitting element 3 leading to total reflection effects.
  • the volume between the sealed window panes Ia and Ib may be filled with dry and inert gases (e.g. noble gases or dry nitrogen) or may be evacuated to sufficient low pressures below 1 mbar enabling a good life-time performance of the organic light-emitting device. Additional getter materials to remove moisture and/or oxygen may be arranged in the neighborhood of the seals with the sealed volume for a further improved life-time performance.
  • the resulting window systems and/or building systems operate as multi-functional light sources for general illumination purposes, spotlighting objects, light effects, light management etc.
  • the embodiments described in the patent specification and the figures shall be considered as examples of a window system, a building system and a method of operating a window system according to the present invention. People skilled in the art will also consider alternative embodiments of the window system, building system and the method of operating the widow system, which are also covered by the claims of the present invention.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Electroluminescent Light Sources (AREA)
  • Liquid Crystal (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

La présente invention porte sur un système de fenêtre (10) comprenant un élément de fenêtre transparent (1), un élément (2) émettant de la lumière organique transparent comprenant au moins une couche émettant de la lumière organique (21) agencée entre des électrodes (22) pour émettre une lumière artificielle (51, 52) et un élément optique (3) comprenant au moins une couche fonctionnelle (31) agencée entre des électrodes de commutation (32), qui est apte à être commutée électriquement entre un mode transparent afin de permettre une transmission de lumière de fenêtre (4) à travers le système de fenêtre et un mode réfléchissant ou absorbant afin de réfléchir ou d'absorber au moins une partie essentielle de la lumière artificielle (51, 52) émise vers l'élément optique (3), ainsi que sur un système de bâtiment comprenant une multitude de systèmes de fenêtre et sur un procédé de fonctionnement d'un système de fenêtre.
PCT/IB2008/053848 2007-09-26 2008-09-23 Système de fenêtre associant des fonctionnalités de fenêtre et d'éclairage WO2009040724A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07117258 2007-09-26
EP07117258.9 2007-09-26

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Publication Number Publication Date
WO2009040724A2 true WO2009040724A2 (fr) 2009-04-02
WO2009040724A3 WO2009040724A3 (fr) 2009-06-18

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TW (1) TW200920987A (fr)
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WO2014181296A1 (fr) 2013-05-10 2014-11-13 Saes Getters S.P.A. Dispositif d'éclairage transparent composite
US9080763B2 (en) 2012-05-17 2015-07-14 GE Lighting Solutions, LLC Edge lit luminaires for windows
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