摘要:
The invention provides a light-emitting arrangement, comprising: a light source adapted to emit light of a first wavelength; a wavelength converting member comprising an organic wavelength converting compound adapted to receive light of said first wavelength and to convert at least part of the received light to light of a second wavelength, said wavelength converting member and said light source being mutually spaced apart; and a sealing structure at least partially surrounding said wavelength converting member to form a sealed cavity containing at least said wavelength converting member, said sealed cavity containing an inert gas and oxygen gas, the concentration of oxygen gas being in the range of from 0.05 to 3% based on the total volume within said sealed cavity. An oxygen concentration in this range has been found to have very limited influence on the life time of the organic wavelength converting compound.
摘要:
This invention relates to a light emitting diode device (100) including an outer casing (102), a light emitting diode element (114), which includes at least one light emitting diode (114a), arranged within the outer casing, a light outlet member (108) constituting a part of the outer casing, a sealed cavity (104) containing a controlled atmosphere, and a seal (110) arranged to seal the cavity. The light emitting diode device further comprises a remote organic phosphor element (116) arranged in the sealed cavity.
摘要:
The invention provides a multi-beam illumination system (1) for providing an illumination image (53). The multi-beam illumination system (1) has a plurality of light sources (11) with optional collimating optics (12), arranged to generate a plurality of light beams (13); a panel (30) comprising a plurality of panel segments (32) in a panel plane (35) at a first distance (d1) and arranged to contain a plurality of segment patterns (34) on the corresponding panel segments (32); and an imaging lens array (40) comprising a plurality of imaging lenses (42) in an imaging lens plane (45) parallel to the panel plane (35). Each imaging lens (42) of the imaging lens array (40) is arranged to image a corresponding segment pattern (34) of the plurality of segment patterns (34) into a respective projection image (52) of a plurality of projection images (52). The plurality of projection images (52) overlap at a predetermined image distance (Lp) and form the illumination image (53).
摘要:
The invention relates to a lighting apparatus comprising a conversion material (2) for converting primary light (4) into secondary light (5), wherein the conversion material (2) comprises converting photolummescent material (15), which degrades to non-converting photolummescent material over time when the conversion material (2) is illuminated by the primary light (4). The conversion material (2) is adapted such that, when the conversion material (2) is illuminated by the primary light (4), the relative decrease in concentration of the converting photolummescent material (15) within the conversion material (2) is larger than the relative decrease in intensity of the secondary light (5). This allows the lighting apparatus to provide an only slightly reduced absorbance of the primary light, even if a large part of the photolummescent material has been bleached, and thus a longer lifetime, with the same or a slightly reduced intensity of the secondary light.
摘要:
The invention relates to a lighting apparatus which comprises a laser light modification unit (2) for modifying laser light (3) to modified light and a laser (4) for emitting laser light (3) that is to be directed to the laser light modification unit (2). The lighting apparatus further comprises a first layer (5) and an opposing second layer (6), wherein the laser light modification unit (2) is arranged between the first layer (5) and the second layer (6), wherein at least one of the first (5) and the second layer (6) comprises a transparent material being transparent to the modified light and wherein the laser light modification unit (2) is adapted to allow the modified light to pass through the transparent material.
摘要:
The invention relates to a compound to improve wrinkle resistance in fabrics, comprising: a wrinkle reducing agent, comprising at least one fusible elastomer, and a liquid carrier for carrying said agent and a salt composition for physical crosslinking said fusible elastomer. The invention also relates to a fabric provided with said wrinkle resistance improving compound. The invention further relates to a method of improving wrinkle resistance in a fabric by use of such a compound.
摘要:
The invention relates to a lighting device (1), an array of such lighting devices and an optical projection device comprising such lighting device. The lighting device, comprises at least one laser source (4) for generating laser radiation, wherein the laser source is optically coupled to an optical element (7, 8, 9) comprising at least one luminescent material, suitable for emitting luminescent radiation upon laser excitation by the laser radiation, wherein the optical element is provided with at least one reflector for directing the radiation from the luminescent dot through an emission window of the optical element. The lighting device is particularly useful in a projector and other lighting applications.
摘要:
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.
摘要:
The invention relates to light emitting devices (2) with variable output color. More specifically, the inventions provides a color conversion cell (10) which can be positioned in front of a light source (4) in order to generate other color or color temperatures. Typically the light source is a light emitting diode (LED) which is power efficient but emits in a narrow and fixed spectra. The new colors are generated by photoluminescence in fluorescent dyes contained in the cell. The color converting of the cell is electrically controllable, preferably by controlling the orientation, density or distribution of the fluorescent dyes, or by controlling a pathlength of the light in the cell.
摘要:
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.