摘要:
A lighting apparatus includes a laser light modification unit for modifying laser light from a laser to form a modified light. The lighting apparatus further includes a first layer and an opposing second layer, where the laser light modification unit is between the first and second layers. One of these two layers includes a transparent material being transparent to the modified light. The laser light modification unit is configured to allow the modified light to pass through the transparent material.
摘要:
A device (230, 1330, 1430) includes: a first electrode (232); an electro-statically movable second electrode (234, 1734, 1834); and an electrically insulating layer (233) disposed between the first and second electrodes. The electro-statically movable second electrode is configured to have a first geometric configuration in response to a first electrical potential between the first and second electrodes, and is further configured to have a second geometric configuration in response to a second electrical potential between the first and second electrodes. The device is configured to receive a time-varying voltage and in response thereto the electrostatically movable second electrode is configured to repeatedly transition between the first geometric configuration and the second geometric configuration to influence a flow of a fluid (235) for cooling at least one heat-generating element (310).
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 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 material 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, the gas pressure within said sealed cavity being 1*10−5 bar (1 Pa) or less. At such pressure, the organic phosphor has been found to have particularly good stability, thus resulting in a longer life time of the phosphor.
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:
A phosphor-enhanced lighting device 100, a retrofit light bulb, a light tube and a luminaire are provided. The phosphor-enhanced lighting 100 device comprises a light source 116, a light exit window 102, a first light conversion element 112 and a second light conversion element 110. The light source 116 emits through its light emitting surface 118 source light 114 of a pre-defined color spectrum. The light exit window 102 emits light into an ambient of the phosphor-enhanced lighting device 100. The first light conversion element 112 comprises an inorganic luminescent material which absorbs a part of the source light 114 and converts a part of the absorbed light to light of a first color 104. The second light conversion element 110 comprises a first organic luminescent material which absorbs a part of the source light 114 and/or absorbs apart of the light 104 of the first color. The first organic luminescent material converts a part of the absorbed light to light of the second color 108. The second light conversion element 110 is optically arranged in between the light exit window 102 and the light emitting surface 118 of the light source 116. The first light conversion element 112 is optically arranged in between the second light conversion element 110 and the light emitting surface 118 of the light source 116. A gap 111 is present between the first light conversion element 112 and the second light conversion element 110.
摘要:
The invention relates to a light emitter adapted for emitting light with a predefined angular color point distribution, to a method of use for a light emitter in video flash applications, in automotive headlight applications and/or in automotive lamp applications, and to a method, adapted for generating light with a predefined angular color point distribution. The light emitter is adapted for emitting light with a predefined angular color point distribution through an output and comprises a phosphor (2) and a pump source (1), wherein the pump source (1) is adapted for emitting pump light to at least part of the phosphor (2), and the phosphor (2) is adapted for emitting phosphor light by light conversion of absorbed pump light, and wherein a matching element (4) is provided which is arranged at least partly between the phosphor (2) and the output of the light emitter, and which is adapted for adjusting the ratio of the light intensity of the emitted phosphor light emitted by the phosphor (2) towards the output of the light emitter to the light intensity of the transmitted pump light going through the phosphor (2) towards the output of the light emitter. In this way, a versatile light emitter with a predefined angular color point distribution in conjunction with any desired angular light intensity distribution is provided at low costs.
摘要:
The present invention relates to a photovoltaic cell device with combined energy conversion and lighting option and a method a controlling such a device. It comprises a responsive element, a reflector or a light source for changing light absorption and thus appearance of photovoltaic cells (e.g. solar panel). It is also possible to combine the responsive element or the reflector with light source(s) providing extra illumination. When combined with a sensor and control unit, ambient intelligent solar panels and ambient intelligent lighting systems can be obtained. A combination of a luminescent solar concentrator (LSC) and light-emitting device is also possible, where an energy storage device is charged by a photovoltaic cell upon irradiation. The energy storage powers one or more light sources which are coupled to the sides of the luminescent plate. The light emitted by the light sources is coupled into the plate and (partly) converted by the luminescent plate. This results in a plate that homogeneously emits light.