Abstract: A lighting system comprising a plurality of controllable light emitting elements is disclosed. The lighting system further comprising a spreading optical element arranged in front of the plurality of light emitting elements to shape the light emitted from the lighting elements, and a controller for varying a light emission angle range of light emitted from the spreading optical element by controlling each of the plurality of controllable light emitting elements. This allows the light emitted from the spreading optical element to be varied without varying any physical parts of the lighting system, because the controller now controls each of the light emitting elements, by e.g. dimming one or more of the light emitting elements or by switching one or more of the light emitting elements off.

Abstract: It is disclosed an optical element (200) wherein one or more light-emitting diodes, LEDs, and additional optics may be provided in an integrated solution that may relatively easily be assembled and maintained in a desired position relatively each other. The optical element (200) may enable one or more LEDs and additional optics to be provided in an integrated solution that is relatively thin and compact in comparison with known devices, such that light from one or more LEDs may be injected into a thin light guide (205, 206) such as an optical fiber, an optical fiber array, a ribbon-shaped light-guiding structure, etc.

Abstract: A lighting system comprising a plurality of controllable light emitting elements 3 is disclosed. The lighting system further comprising a spreading optical element 5 arranged in front of the plurality of light emitting elements to shape the light emitted from the lighting elements, and a controller 7 for varying a light emission angle range of light emitted from the spreading optical element 5 by controlling each of the plurality of controllable light emitting elements. This allows the light emitted from the spreading optical element to be varied without varying any physical parts of the lighting system, because the controller now controls each of the light emitting elements, by e.g. dimming one or more of the light emitting elements or by switching one or more of the light emitting elements off.

Abstract: A LED circuit comprises an array of LEDs is arranged in a matrix. The matrix is connected to at least three power rail lines. The LEDs are formed as a first LED arrangement (34) between a first power rail line (30) and a second power rail line (32) and a second LED arrangement (36) between the second power rail line (32) and a third power rail line (30) of the same voltage as the first power rail line. This means there are alternating power rail lines interspersed with the matrix of LEDs. This enables the driving voltages to be kept low and it improves scalability of the design.

Abstract: The present invention relates to a luminescent solar concentrator for a solar cell, comprising a collector with a luminescent substrate, and a wavelength selective filter, wherein the wavelength selective filter is arranged above the surface of the collector, wherein the luminescent substrate has an absorption edge which corresponds to a wavelength ?ex and emits radiation around a wavelength ?em, wherein the selective filter has a refractive-index contrast ?n with a negative or zero dispersion, and wherein the wavelength selective filter is designed to keep the emitted radiation inside the collector while shifting the reflection band of the incident radiation to angles ?25° and/or to narrow the reflection band to a range of ?10°.

Abstract: The invention provides a method and system of controlling illumination characteristics of a plurality of lighting segments. According to the invention, there is provided an illumination system, comprising: a plurality of lighting segments; a detecting subsystem configured to detect an illumination intensity and/or color of lights emitted from each lighting segment; a controller configured to receive the detecting subsystem's output signals representing illumination intensity and/or color of lights emitted from each lighting segment and to generate sets of driving signals to respectively adjust the driving currents of each lighting segment in response to the output signals, so as to adjust the illumination intensity and/or color of the lights emitted from each lighting segment in accordance with a predetermined illumination setting, wherein each set of driving signals has a unique period feature which is distinguished from that of other sets of driving signals corresponding to other lighting segments.

Abstract: A light-emitting electronic textile (1;35) comprising: a flexible component carrier (2) having a plurality of light sources (3) arranged thereon; and at least one textile light-diffusing member (4) arranged to diffuse light emitted by the light sources (3). The textile light-diffusing member (4) comprises: a first textile layer (10) comprising fibers (14); a second textile layer (11) comprising fibers (15); and a spacing layer (12) arranged between the first textile layer (10) and the second textile layer (11), wherein the spacing layer (12) comprises spacing fibers (16) that space apart the first and second textile layers, the spacing fibers (16) being attached to fibers (14,15) comprised in each of the first and second textile layers to thereby mechanically connect the first (10) and second (11) textile layers with each other.

Abstract: A light output device has scattering regions fabricated on an LED array using a self-aligned process, during which the light of each LED (10) is used to control the deposition process of scattering particles (22) on a photo-sensitive layer (20).

Abstract: A light output device and manufacturing method in which an array of LEDs (34) is embedded in an encapsulation layer (32). An array of cavities (30) (or regions of different refractive index) is formed in the encapsulation layer (32). The cavities/regions (30) have a density or size that is dependent on their proximity to the light emitting diode (34) locations, in order to reduce hot spots (local high light intensity areas) and thereby render the light output more uniform over the area of the device.

Abstract: A lighting system comprises a circuit board (30) which carries a lighting circuit comprising a plurality of lighting elements (72). The surface of the circuit board (30) carrying the lighting elements is at least partially reflective. A spacer layer (70) is over the circuit board and a top reflector (82) is over the spacer layer. The spacer layer defines a light cavity air gap between the circuit board and the top reflector, and the top reflector and/or the circuit board is provided with an array of light out-coupling structures.

Abstract: This invention relates to thermal management for removing heat generated by a heat source (110). This is done by a combination of a heat conducting member (120), which is thermally connected to the heat source in one end and to a remotely arranged heat sink (130) in the opposite end, and a synthetic jet actuator (140). The synthetic jet actuator is arranged to provide active cooling directly onto the heat source by generating and directing an air flow towards the heat source. The synthetic jet actuator comprises a resonator cavity housing (150) and an oscillating member (160). The oscillator member is arranged at least partly inside said resonator cavity. The combination of the heat conducting member and the synthetic jet actuator provides a highly efficient cooling.

Abstract: An optical element includes a first optical member with at least one indentation at a first surface thereof, and a second optical member attached to the first surface. The second optical member conforms to the at least one indentation in the first optical member. The optical element further includes at least one reflector at an interface between the first and second optical members, where the at least one reflector is located at the at least one indentation. The reflector is formed by an interface between a cavity formed between the first and second optical members and at least one of the first and second optical members.

Abstract: A light guide (11; 101; 111) comprising first and second oppositely arranged faces, an in-coupling portion (13a-f) for in-coupling of light from a light-source (12a-f; 95a-f; 102; 106a-c; 112a-f), and an out-coupling portion (15a-f; 103; 113a-f) located adjacent to the in-coupling portion (13a-f). The out-coupling portion (15a-f; 103; 113a-f) is configured to out-couple a primary light beam having a direction of propagation directed from a position in the in-coupling portion (13a-f) with a lower out-coupling efficiency than a secondary light beam having a direction of propagation directed from a position in the light guide (11; 101; 111) outside the in-coupling portion (13a-f). In this manner, a good mixing of light in the light guide can be achieved without imposing any particular requirements on the collimation of the in-coupled light.

Abstract: The invention relates to a Luminescent Solar Concentrator system (400) and a method for collecting and concentrating external light, particularly sunlight (?1, ?2). The external light is collected by a luminescent converter component (410) having a thickness D and a ratio R=ax/ac between the absorption coefficient ax for sunlight and the reabsorption coefficient ac for luminescence light. Due to the luminescent material comprised by said converter component (410), at least a part of the external light is converted into luminescence light. Moreover, light propagating within the converter component (410) is extracted from it at light extraction sites (EX) having distances W?0.1·R·D from each other. Light extraction components may for example comprise slanted mirroring surfaces (414) and/or optical elements in contact to the converter component.

Abstract: A lamp for emitting light, comprising a transparent sheet-like lightguide, with at least one light receiving side, a light emission front surface and a back surface opposite the front surface. The lamp further comprises a plurality of light sources, positioned in an array and optically coupled to at least one light receiving side. The back surface of said lamp comprises a plurality of optical extraction structures, for example provided in parallel curved lines. Furthermore, the lamp is substantially free from light scattering structures in a light path of the light to be emitted.

Abstract: An X-raydetector (1) is proposed comprising a light detection arrangement (3) such as a CMOS photodetector, a scintillator layer (5) such as a CsI:T1 layer, a reflector layer (9) and a light emission layer (7) interposed between the scintillator layer (5) and the reflector layer (9). The light emission layer (7) may comprise an OLED and may be made with a thickness of less than 50 ?m. Thereby, a sensitivity and resolution of the X-raydetector may be improved.

Abstract: The invention relates to an illumination device (10) for illuminating a surface (101), with at least one lighting element (20) and an illuminating body (30), wherein the lighting element (20) emits an artificial light (21,21), a housing element (40) comprises the lighting element (20) and supports the illuminating body (30), the illuminating body (30) comprises a transparent light conductive material suitable to illuminate the surface (101) lying subjacent. The invention discloses, that the illuminating body (30) comprises a surface pattern (80), forming a Fresnel-type lens to optically magnify the surface (101).

Abstract: A light-emitting electronic textile (1;35) comprising: a flexible component carrier (2) having a plurality of light sources (3) arranged thereon; and at least one textile light-diffusing member (4) arranged to diffuse light emitted by the light sources (3). The textile light-diffusing member (4) comprises: a first textile layer (10) comprising fibers (14); a second textile layer (11) comprising fibers (15); and a spacing layer (12) arranged between the first textile layer (10) and the second textile layer (11), wherein the spacing layer (12) comprises spacing fibers (16) that space apart the first and second textile layers, the spacing fibers (16) being attached to fibers (14,15) comprised in each of the first and second textile layers to thereby mechanically connect the first (10) and second (11) textile layers with each other.

Abstract: The invention relates to an illumination device (10) for illuminating a surface, with a lighting element (20) and an illuminating body (30), wherein the lighting element (20) emits an artificial light (21,21?), a housing element (40) comprises the lighting element (20) and supports the illuminating body (30), the illuminating body (30) comprises a transparent light conductive material and is generally overlying the surface, being illuminated. The invention discloses, that the illuminating body (30) comprises a light extraction layer (50), configured to receive and to deflect the artificial light (21,21?) from the lighting element (20) onto the surface.

Abstract: A lighting structure comprises a light generation assembly comprising a light source for generating light. In order to meet desired lighting requirements, the lighting structure further comprises a substantially plate-shaped light guiding structure. The light guiding structure is provided with a light assembly recess and a light emission structure. The light generation assembly is arranged in the light assembly recess of the light guiding structure such that light emitted by the light generation assembly enters and propagates in the light guiding structure. The light emission structure is arranged for emitting the propagating light from the light guiding structure.