Abstract:
The invention refers to an optical information carrier (1) for carrying information to be read out by means of an optical beam (9) having at least one information layer (6). It is an object of the invention to provide information carriers (1) with improved collection efficiency. To achieve this object the at least one information layer (1) contains Bragg reflectors for reflecting light of the optical beam (9), when said Bragg reflector is heated above a reflectance threshold temperature by said optical beam.
Abstract:
A laminated electroluminescent panel comprising: a supporting transparent substrate; an organic device formed on the transparent substrate defining a plurality of pixels; the organic device including an organic luminescent layer between a lower and an upper electrode layer; and a sealing layer positioned to form together with the substrate a hermetic, moisture proof encapsulation for the organic device. The sealing layer comprises an inorganic material, and a hydrogen gutter is located inside the encapsulation at a position in physical connection with the organic luminescent layer. The hydrogen gutter prevents the building-up of pressure inside the encapsulation due to hydrogen gas formed due to and during operation of the organic device.
Abstract:
The invention relates to a sealed thin- film device (10, 12, 14), to a method of repairing a sealing layer (20) applied to a thin-film device (30) to produce the sealed thin- film device, to a system (200) for repairing the sealing layer applied to the thin- film device to generate the sealed thin- film device and to a computer program product. The sealed thin- film device comprises a thin- film device and a sealing layer applied on the thin- film device for protecting the thin- film device from environmental influence. The sealed thin- film device further comprises locally applied mending material (40; 42, 44) for sealing a local breach (50) in the sealing layer. An effect of this sealed thin- film device is that the operational life-time of the sealed thin- film device is improved. Furthermore, the production yield of the production of sealed thin- film devices is improved.
Abstract:
The invention relates to a spectral detector for measuring properties of light over portions of the electromagnetic spectrum including cholesteric liquid crystal material and switching means capable of varying the pitch of the helix of the cholesteric liquid crystal material, so that the position of the transmission wavelength band is adjusted in response to the switching means. The spectral detector may further include at least one light direction selecting structure for selecting light incident on the spectral detector having a certain angle of incidence. This invention also relates to a lighting system including the spectral detector of the invention.
Abstract:
The invention provides a lighting device (100) comprising a light source (10) arranged to generate light source light (11), an optional luminescent material and a thermally variable reflecting element (60). The optional luminescent material (205) is arranged downstream of the light source (10) and is arranged to convert at least part of the light source light (11) into luminescent material light (211). One or more of the light source (10) and the optional luminescent material (205) generate heat when the light source (10) generates light source light (11). The thermally variable reflecting element (60) is arranged downstream of the light source (10) and the optional luminescent material (205). The thermally variable reflecting element (60) has a first state wherein it is substantially reflecting and a second state wherein it is substantially transparent; heat induces a chance from the first state to the second state. The thermally variable reflecting element (60) is arranged to transmit at least part of one or more selected from the group consisting of the light source light (11) and optional luminescent material light (211) when being in the second state. The lighting device (100) is arranged to transport heat generated by one or more of the light source (10) and the optional luminescent material (205) to the thermally variable reflecting element (60).
Abstract:
The invention relates to a lighting system, a light element for use in such system, and a display comprising such a lighting system. The lighting system comprises light elements (5) such as LEDs or OLEDs, located between two preferably transparent substrates (2, 3) provided with an electrically conducting layers. The light element has sliding electrical contacts, enabling movement of the light element between the substrates while being lit. Such a system provides a relatively simple lighting system allowing for easy modification.
Abstract:
Alight output device comprises a substrate arrangement(1,2), at least one light source (4) within the substrate arrangement and having a light output which is generally directed laterally within the substrate arrangement and an arrangement of passive light source elements(6;10). The passive light source elements (6;10) formpart ofthe substrate arrangement, for illumination by the light source output, and in response to project output light. Different colours are provided at different output regions of the device, generating a multi-colour image, or at different output directions, thereby generating different colour effects from different viewing positions.
Abstract:
Alight output device comprises a substrate arrangementcomprisingfirst and second substrates(1,2), and an insulating layer (5) between the substrates. Atleast one light source (4) is provided within the substrate arrangement, withthe light output passing into the insulating layer (5). The insulating layer has portions (6) of different refractive index in the vicinity of the light source, thereby defining an optical output function for the light output of the light source. This arrangement uses the insulating layer (5) between the substrates as an optical output device, to provide a desired optical output function.
Abstract:
An illumination device for providing a polarized light beam comprising a light source (101) having a light emitting surface arranged to emit light (107) in a plane (X-Y), a first polarizing reflector (103) arranged to enclose a light emitting surface of said light source (101) in said plane, and adapted to receive said light, reflect light (109) of a first elliptical polarization in a target direction (Z) and transmit light (111) of an opposite, second elliptical polarization; and a second reflector (105) arranged to enclose said first polarizing reflector (103) in said plane (X-Y), and adapted to receive transmitted light (111) from the first polarizing reflector (103) and reflect elliptical polarized light (113) in the target direction (Z). By arranging the two reflectors enclosing a side-emitting light source, a higher efficiency can be obtained with a preserved beam shape.
Abstract:
The invention relates to a self-supporting luminescent film (10), a phosphor- enhanced illumination system and to a method of manufacturing the self-supporting luminescent film. The self-supporting luminescent film comprises luminescent particles (20) and an organic polymer (30). The luminescent particles comprise luminescent material which is arranged for absorbing at least part of the impinging light impinging on the luminescent particles and for converting the absorbed light into converted light. The converted light has a predefined spectrum different from the impinging light. The organic polymer interconnects the luminescent particles to form the self-supporting luminescent film, wherein the self- supporting luminescent film comprises less than 10 weight percentage of organic polymer. The effect of the measures according to the invention is that the close packing of the luminescent particles generates a substantially uniform self-supporting luminescent film.