摘要:
A variable reflector device, comprising a reflector (6) arranged to direct light from a light source (7) and a casing (5) containing the reflector (6), a portion of said casing (5) being transparent to light directed by the reflector (6). The reflector (6) is formed by a meniscus (2) at an interface between two immiscible fluids (3,4) contained in said casing (5). According to this design, the spatial distribution of light from the light source is changeable by changing the shape of the meniscus between the two fluids. Since a change in shape of the meniscus is effected by a displacement of fluids rather than of mechanical parts, the change in reflector shape can generally be performed faster and with less energy consumption than is the case with previously known designs. Further, a meniscus between two immiscible fluids can, due to the nature of fluids, take on several different shapes, which is not the case when a solid body reflector is utilised.
摘要:
An illumination system has a plurality of light emitters (R5G5B), a first light-collimator (1) for collimating light emitted by the light emitters, and at least a second light-collimator (2) for collimating light emitted by the light emitters. The first light-collimator is arranged around a longitudinal axis (25) of the illumination system, and second light-collimator is being arranged around the first light-collimator along the longitudinal axis. Light propagation in the first light-collimator on total internal reflection. Light propagation in the second light-collimator is based on total internal reflection or on reflection at an outer surface of the second light-collimator facing away from the longitudinal axis. The cavity (3) is provided between the first and the second light-collimator. The cavity is provided with a switchable element based on electrowetting, wherein the switchable optical element is switchable in a mode of operation reducing the effect of the second light-collimator.
摘要:
A small and bright light-emitting device, comprising an outer boundary lens surface and at least one LED, is achieved by carefully choosing the inclination of each surface portion of the outer lens surface with respect to the chip size of the light source. The inclination of the surface portions are chosen such that the lens provides an optimal weighing between size and light efficiency.
摘要:
An illumination system has a mounting substrate (4) for mounting and electrically contacting a plurality of light-emitting diodes (R, A, G, B). A first category of the light-emitting diodes (G, B) comprises a first translucent substrate (11) provided with an active layer (1) on an outer surface (13) of the first translucent substrate facing the mounting substrate (4); electrical contacts are provided at a side facing the mounting substrate. A second category of the light-emitting diodes (R, A) comprises an active layer (2) arranged on a second translucent substrate (12); at least one electrical contact is provided at a side facing away from the mounting substrate. Each light-emitting diode of the first category is provided on a first sub mount (21). Each light-emitting diode of the second category is provided on a second sub mount (22). The first and second sub mount are provided on the mounting substrate.
摘要:
An illumination system has a plurality of light emitters (R, G, B) and a light-collimator (1) for collimating light emitted by the light emitters. The light-collimator is arranged around a longitudinal axis (25) of the illumination system. A light-exit window (5) of the light-collimator at a side facing away from the light-emitters is provided with a translucent cover plate (11) provided with a switchable optical element (15) based on electro wetting. The light-exit window of the light-collimator or the translucent cover plate is provided with a light-dispersing structure (7) for broadening an angular distribution of the light emitted by the illumination system. The optical element (15) being switchable in a mode of operation reducing the effect of the light-dispersing structure (7). Preferably, the effect of the light-dispersing structure is substantially counteracted when the switchable optical element operates in the mode of operation reducing the effect of the light-dispersing structure.
摘要:
The invention relates to a light source (10, 12) comprising a light emitter (20) arranged inside a translucent outer envelope (30, 32). The light emitter comprising a light emitting device (40) and comprising a translucent inner envelope (50) at least partially surrounding the light emitting device, the translucent inner envelope comprising a diffuser. A diameter (di) of the translucent inner envelope is smaller than a diameter (do) of the translucent outer envelope. The translucent outer envelope is connected to a base (60) not being translucent. The translucent outer envelope further comprises a symmetry axis (S). An imaginary base-plane (P) is defined substantially perpendicular to the symmetry axis (S) and intersects with a connection point (C) being part of the translucent outer envelope. The connection point is a light transmitting part of the translucent outer envelope at an interface between the translucent outer envelope and the base at a furthest distance from a center (M) of the translucent outer envelope. The light emitter is arranged inside the translucent outer envelope at a distance from the imaginary base-plane away from the base.An effect of the light source according to the invention is that the emission profile of the light source according to the invention is increased.
摘要:
An illumination system has a mounting substrate (4) for mounting and electrically contacting a plurality of light-emitting diodes (R, A, G, B). A first category of the light-emitting diodes (G, B) comprises a first translucent substrate (11) provided with an active layer (1) on an outer surface (13) of the first translucent substrate facing the mounting substrate (4); electrical contacts are provided at a side facing the mounting substrate. A second category of the light-emitting diodes (R, A) comprises an active layer (2) arranged on a second translucent substrate (12); at least one electrical contact is provided at a side facing away from the mounting substrate. Each light-emitting diode of the first category is provided on a first sub mount (21). Each light-emitting diode of the second category is provided on a second sub mount (22). The first and second sub mount are provided on the mounting substrate.
摘要:
An illumination system has linear array of light emitters (R, G, B, A, W) associated with it least one linear array of outcoupling means (O1, O2, O3, . . . ) for coupling light out of the illumination system. Each linear array of outcoupling means is arranged parallel to the linear array of light emitters. For each linear array of outcoupling means, a configuration of the outcoupling means and a configuration of the light emitters fulfill the requirement: NCU×NLC=NOU×NLO, wherein NCU is the number of clusters (C1, C2, C3, . . . ) per unit (U1, . . . ), NLC is the number of light emitters in each of the clusters, NOU is the number of outcoupling means per unit, NLO is the number of light emitters per outcoupling means. A “cluster” is the smallest repetitive collection of light emitters forming the linear array of light emitters. A “unit” is the smallest number of adjacent clusters repetitive with respect to the outcoupling means and with respect to the light emitters.
摘要:
A light emitting diode (LED) assembly, comprising a metal substrate (1) which is partly covered on one side with a dielectric layer (2) on which an electric circuit (3) is present, and a multitude of LED units (5, 6, 7) each comprising a LED chip, wherein each LED unit is mounted in a gap in said dielectric layer on the metal substrate by a heat conducting adhesive layer (8), wherein electrical conductors (9) connect each LED unit with the electric circuit on the adjacent dielectric layer, and wherein at least two LED units are mounted together in one gap in the dielectric layer.
摘要:
The invention relates to a light source (10, 12) comprising a light emitter (20) arranged inside a translucent outer envelope (30, 32). The light emitter comprising a light emitting device (40) and comprising a translucent inner envelope (50) at least partially surrounding the light emitting device, the translucent inner envelope comprising a diffuser. A diameter (di) of the translucent inner envelope is smaller than a diameter (do) of the translucent outer envelope. The translucent outer envelope is connected to a base (60) not being translucent. The translucent outer envelope further comprises a symmetry axis (S). An imaginary base-plane (P) is defined substantially perpendicular to the symmetry axis (S) and intersects with a connection point (C) being part of the translucent outer envelope. The connection point is a light transmitting part of the translucent outer envelope at an interface between the translucent outer envelope and the base at a furthest distance from a center (M) of the translucent outer envelope.