摘要:
By incorporating two-pole circuits (13) as switching elements in a picture display device based on field emission, the emission (and hence the picture intensity) is substantially defined by the charge of a capacitance (15) associated with a part of a pixel (8). Charge-controlled drive leads to a more accurate adjustment than the voltage-controlled drive used until now and leads to lower drive voltages, less power consumption and a longer lifetime of the phosphors used in the display device.
摘要:
The invention relates to a novel red emitting material of (Ba1—x—y—zSrxCayEuz)2Si5—a−bAlaN8−a−4bOa+4b having an average particle size distribution d50 of >6 μm, with 0.3≦x≦0.9, 0.01≦y≦0.1, 0.005≦z≦0.04, 0≦a≦0.2 and 0≦b≦0.2.
摘要:
A conversion element (3) comprising a ceramic material (31) with a multiplicity of pores (32) provided for at least the partial absorption of at least one primary radiation (52) and for transforming the primary radiation (52) into at least one secondary radiation (53), wherein the conversion element (3) has a density greater than or equal to 97% of the theoretical solid-state density of the ceramic material (31), and the pores (32) in the conversion element (3) have a diameter substantially between 200 nm and 5000 nm.
摘要:
A lighting device including at least one conversion element and a least one LED, which emits light into the conversion element. The light is then converted and emitted with a high radiant flux. The at least one LED emits light in the wavelength range of ≧220 nm to ≦800 nm and the at least one conversion element converts at least part of the light from the at least one LED to light in the wavelength range of >300 nm to
摘要:
An illumination system, comprising a radiation source and a luminescent material comprising at least one phosphor 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 a yellow red-emitting cerium(III)-activated alkaline earth oxonitridoaluminosilicate of general formula Ca1−x−yAxAl1+a−bBbSi1−aN3−aOa:Cey, wherein A selected from the group comprising beryllium, magnesium, strontium, barium, zinc, manganese, lithium, sodium, potassium, rubidium, praseodymium, samarium, europium, and B selected from the group comprising boron, gallium, scandium and wherein 0
摘要:
The invention relates to a novel red emitting material of (Ba1—x—y—zSrxCayEuz)2Si5—a−bAlaN8'a−4bOa+4b having an average particle size distribution d50 of >6 μm, with 0.3≦x≦0.9, 0.01≦y≦0.1, 0.005≦z≦0.04, 0≦a≦0.2 and 0≦b≦0.2.
摘要翻译:本发明涉及平均粒度分布d50>6μm的(Ba1-xy-zSrxCayEuz)2Si5-a-bAlaN8'a-4bOa + 4b的新型红色发射材料,其中0.3≤x≤0.9,0.01@y @ 0.1,0.005 @ z @ 0.04,0 @ a @ 0.2和0 @ b @ 0.2。
摘要:
An illumination device includes an active layer, such as a blue LED, covered with a first luminescent ceramic converter layer and partially covered with a second luminescent ceramic converter layer. The first and second conversion layers convert primary photons emitted by the active layer into photons of different, longer wavelengths. The color point of the illumination device can be adjusted by adjusting the relative size of the second conversion layer.
摘要:
An electroluminescent device includes a substrate and a sandwich consisting of a first electrode, an electroluminescent layer and a second electrode. To improve decoupling of light from the electro-luminescent device, a layer comprising conductive particles adjoins the first or second electrode.
摘要:
An organic electroluminescent light source has at least one substrate and layers that are arranged on the substrate. The layers include electrodes of which at least one electrode is transparent and one acts as an anode and one as a cathode, and at least one organic electroluminescent layer that is arranged between the electrodes. The organic electroluminescent layer has regions that emit blue light and/or green light, and at least one phosphor layer that is arranged in the beam path of the light leaving the organic electroluminescent light source and that partly covers the electroluminescent layer.
摘要:
An electroluminescent device comprising at least one electroluminescent light source (2) with an electroluminescent layer (21) for emitting a primary radiation with an emission characteristic around a mean emission direction (5), and at least one light-converting element (3) for converting at least part of the primary radiation into a secondary radiation, wherein the shape of the light-converting element (3) is adapted to the emission characteristic of the electroluminescent light source (2) so as to generate a defined correlated color temperature as a function of a viewing angle (10).