Abstract:
The invention relates to a light source (1) comprising at least one light emitting device (2) capable of emitting electromagnetic radiation in the range from near ultraviolet to blue in response to a driving signal of a driving means (6). A luminescent cover (3) comprises at least a first activator (A 1 ) and a second activator (A 2 ) to convert said electromagnetic radiation into visible light. The first activator and second activator have different response characteristics and the driving means (6) is adapted to vary said driving signal to control the spectrum of said visible light for said light source. Preferably, the driving signal is a pulsed driving signal and said driving means is adapted to vary the pulse width of said pulsed driving signal. Accordingly, the light source (1) has a dimming performance resembling that of an incandescent lamp.
Abstract:
A light emitting system (1) comprising a radiation source (2) capable of emitting a first light of at least a first wavelength spectrum; a first fluorescent material (4) capable of absorbing at least partially the first light and emitting second light having a second wavelength spectrum; a second fluorescent material (8) capable of absorbing at least partially the first light and emitting a third light having a third wavelength spectrum; wherein one, the first (4) or the second fluorescent material (8) is a polycrystalline ceramic with a density of more than 97 percent of the density of a monocrystalline material and the respective other fluorescent material is a phosphor powder with a median particle size 100 nm 50%
Abstract:
The invention relates to a light source (1) comprising at least one light emitting device (2) capable of emitting electromagnetic radiation in the range from near ultraviolet to blue in response to a driving signal of a driving means (6). A luminescent cover (3) comprises at least a first activator (A 1 ) and a second activator (A 2 ) to convert said electromagnetic radiation into visible light. The first activator and second activator have different response characteristics and the driving means (6) is adapted to vary said driving signal to control the spectrum of said visible light for said light source. Preferably, the driving signal is a pulsed driving signal and said driving means is adapted to vary the pulse width of said pulsed driving signal. Accordingly, the light source (1) has a dimming performance resembling that of an incandescent lamp.
Abstract translation:本发明涉及一种光源(1),其包括响应于驱动装置(6)的驱动信号,能够从近紫外至蓝色的范围内发射电磁辐射的至少一个发光装置(2)。 发光罩(3)至少包括第一激活剂(A SUB 1)和第二活化剂(A 2 N 2),以将所述电磁辐射转化成可见光。 第一激活器和第二激活器具有不同的响应特性,并且驱动装置(6)适于改变所述驱动信号以控制用于所述光源的所述可见光的光谱。 优选地,驱动信号是脉冲驱动信号,并且所述驱动装置适于改变所述脉冲驱动信号的脉冲宽度。 因此,光源(1)具有类似于白炽灯的调光性能。
Abstract:
An illumination system, comprising a radiation source and a luminescent material comprising at least one phosphor capable of absorbing a part of the light emitted by the radiation source and emitting light having a wavelength different from that of the absorbed light; wherein said at least one phosphor is a yellow to red-emitting europium(II)-activated ortho-phosphosilicate of general formula EA2-x-yAxPxSi1-xO4:Euy, wherein EA is at least one bivalent metal selected from the group comprising calcium, magnesium, strontium, barium, zinc and manganese, A is at least one monovalent metal chosen from the group of lithium, sodium, potassium, rubidium, cesium, copper and silver, and wherein 0.01 = x = 1 and 0.0025 = y = O.1 can provide light sources having high luminosity and color-rendering index, especially in conjunction with a light emitting diode as a radiation source. The red to yellow emitting europium(II)-activated ortho-phosphosilicate of general formula EA2-x-yAxPxSi1-xO4:Euy, wherein EA is at least one bivalent metal selected from the group comprising calcium, magnesium, strontium, barium, zinc and manganese, A is at least one monovalent metal chosen from the group of lithium, sodium, potassium, rubidium, cesium, copper and silver, and wherein 0.01 = x = 1 and 0.0025 = y = 0.1 is efficiently excitable by primary radiation in the near UV-to-blue range of the electromagnetic spectrum.
Abstract translation:一种照明系统,包括辐射源和发光材料,所述发光材料包括至少一种能够吸收由所述辐射源发出的光的一部分并发射具有与所吸收的光的波长不同的波长的光的荧光体; 其中所述至少一种磷光体是通式EA2-x-yAxPxSi1-xO4:Euy的黄色至红色发射的铕(II)活化的正磷硅酸酯,其中EA为选自钙, 镁,锶,钡,锌和锰,A是选自锂,钠,钾,铷,铯,铜和银的至少一种一价金属,其中0.01 = x = 1和0.0025 = y = O。 1可以提供具有高亮度和显色指数的光源,特别是与作为辐射源的发光二极管相结合。 通式EA2-x-yAxPxSi1-xO4:Euy的红色至黄色发射的铕(II)活化的邻磷硅酸盐,其中EA是至少一种选自钙,镁,锶,钡,锌和 锰,A是选自锂,钠,钾,铷,铯,铜和银的至少一种一价金属,并且其中0.01 = x = 1和0.0025 = y = 0.1可以通过在近 UV到蓝色范围的电磁光谱。
Abstract:
A light emitting system (1) comprising a radiation source (2) capable of emitting a first light of at least a first wavelength spectrum; a first fluorescent material (4) capable of absorbing at least partially the first light and emitting second light having a second wavelength spectrum; a second fluorescent material (8) capable of absorbing at least partially the first light and emitting a third light having a third wavelength spectrum; wherein one, the first (4) or the second fluorescent material (8) is a polycrystalline ceramic with a density of more than 97 percent of the density of a monocrystalline material and the respective other fluorescent material is a phosphor powder with a median particle size 100 nm 50%
Abstract:
The invention relates to a light emitting device, in particular discharge lamps with inner or outer electrodes or electrodeless in which the emittance of red light is enhanced by using a monolithic ceramic luminescence converter.
Abstract:
An illumination system, comprising a radiation source and a monolithic ceramic luminescence converter comprising at least one phospbor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is an alkaline earth metal sulfide of general formula AE 1-z S 1-y Se y :A z , wherein AE is at least one earth alkaline metal selected from the group of Mg, Ca, Sr and Ba, 0 = y 1-z S 1-y Se y :A z , wherein AE is as least one earth alkaline metal selected from the group of Mg, Ca, Sr and Ba, 0 = y
Abstract:
The invention relates to a light emitting device comprising a substrate layer and a light conversion layer located on said substrate layer, whereby the light conversion layer is a polycrystalline ceramic layer, characterized in that the light conversion layer is positioned on the substrate layer by sintering.
Abstract:
Fuente (1) de luz que comprende al menos un dispositivo (2) emisor de luz que puede emitir radiación electromagnética en el intervalo desde el ultravioleta cercano hasta el azul en respuesta a una señal de excitación de un medio (6) de excitación y una cubierta (3) luminiscente para convertir dicha radiación electromagnética en luz visible, caracterizada porque la cubierta luminiscente comprende al menos un primer activador (A1) y un segundo activador (A2), en la que dicho primer activador y dicho segundo activador tienen diferentes características de respuesta y dicho medio de excitación está adaptado para variar dicha señal de excitación para controlar el espectro (Sptotal(λ)) de dicha luz visible para dicha fuente de luz.
Abstract:
The invention relates to a light-emitting device comprising a conversion structure and one or several LEDs (40), which emit light into the conversion structure. The light is then converted and emitted with a high radiant flux.