Abstract:
The present invention relates to a LED comprising a substrate layer (10) with a first surface and a second surface opposing the first surface and having a refractive index of n
Abstract:
An organic light-emitting diode comprising a front electrode member, a counterelectrode member, an organic electroluminescent member comprising an organic electroluminescent material arranged between the front electrode member and the counterelectrode member, and a UV-protective filter member.
Abstract:
The invention describes a light-emitting device which comprises at least a substrate (1), an anode (2), a first hole transport layer (3), a light-emitting layer (5) and a cathode (6), and in which a first hole blocking layer (4) is arranged between the first hole transport layer (3) and the light-emitting layer (5). The hole +ocking layer (4) reduces the concentration of holes which reach the light-emitting layer (5) and thus the concentration of holes, which are usually the majority charge carriers, can be adapted to the electron current.
Abstract:
The invention relates to an illumination system comprising a radiation source and a fluorescent material comprising at least one phosphor capable of absorbing a portion of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light; wherein said at least one phosphor is a green-emitting cerium-activated lutetium-aluminum-garnet of general formula (Lu1-x-y-a-bYxGdy)3(Al1-zGaz)5O12:CeaPrb wherein 0
Abstract:
The invention relates to an electroluminescent device comprising a substrate (1) and a laminated body composed of a first electrode (3), an electroluminescent layer (4) and a second electrode (5). The light output out of the electroluminescent device is increased by arranging a colloidal layer (2) between the substrate (1) and the laminated body. By using pigments in the colloidal layer (2), the emission color of the electroluminescent device can be changed and the daylight contrast improved.
Abstract:
A color cathode ray tube, that is fitted with a color screen that comprises a glass face panel, a phosphor coating and a UV-reflective layer that is arranged between the glass face panel and the phosphor coating, the UV-reflective layer containing colloid particles of an oxygen-containing material, having a grain size d
Abstract:
The invention describes a cathode ray tube wherein the position of the electron beam (7, 8, 9) is determined in that detection strips (12, 13) of a light-emitting material are arranged between the individual phosphor segments (17, 18, 19) of the segmented phosphor layer (11). The detection strips (12, 13) comprise strip-shaped sections containing the same light-emitting material, the length of the strip-shaped sections of the first set of detection strips being different from the length of the strip-shaped sections of the second set of detection strips.
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 an illumination device (10) that comprises an active layer (11), for example a blue LED, covered with a first luminescent ceramic converter layer (12) and partially covered with a second luminescent ceramic converter layer (13). The first and second conversion layers (12, 13) convert primary photons (λ p ) emitted by the active layer (11) into photons of different, longer wavelengths (λ 1 , λ 2 ), wherein the color point of the illumination device (10) can be adjusted by adjusting the relative size of the second conversion layer (13).
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%