Abstract: The invention describes an electroluminescent device equipped with a substrate, a metallic structure and a layer assembly comprising at least a first electrode, an electroluminescent layer and a second electrode. The metallic structure, which is in electrical contact with the first electrode, exhibits a lower layer resistance than the first electrode. Owing to the electrical contact with the first electrode, the layer resistance of the first electrode, and thus the voltage drop over the first electrode, is reduced.

Abstract: The invention describes an electroluminescent device equipped with a first electrode and a second electrode and with a compressed optical layer with quantum dots, wherein the compressed optical layer emits radiation under the influence of an electrical field. The electroluminescent device in accordance with the invention exhibits increased stability and improved efficiency and brightness.

Abstract: Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.

Abstract: The invention relates to an electroluminescent device with a transparent cathode. Said electroluminescent device comprises a substrate (1) and, adjacent to said substrate (1), a laminated body composed of a first electrode (2), an electroluminescent layer (3) and a second metallic electrode (4). Said second electrode (4) is covered with transparent dielectric layers (5), which increase the transmission of light through the second metallic electrode (4) and serve as filters.

Abstract: A luminous body for generating white light is described which is provided with a combination of a light-emitting diode radiating blue light and a fluorescent lamp comprising green and red phosphors.

Abstract: The invention relates to an electroluminescent device, which comprises a first set of bands and a second set of bands, which are arranged in such a way, that they form a two-dimensional mesh with points of intersection between the bands of the first set and the bands of the second set. The bands in each case consist of a sequence of layers and at least one set of bands contains a light-emitting substance, which emits light when a voltage is applied. The band structure increases the contact areas between the individual bands and the light is generated more efficiently.

Abstract: Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.

Abstract: The invention relates to an electroluminescent device comprising a substrate (1), a porous layer (2) that borders on said substrate (1), a laminated body that borders on said porous layer (2) and that is composed of at least a first electrode (3), an electroluminescent layer (4) and a second electrode (5), a colored material, preferably an ink, being present at least partially in the pores of the porous layer (2). Said porous layer (2) may be segmented and include a plurality of different colored materials, so that a black matrix structure and/or a color filter structure is obtained. The invention also relates to a method of manufacturing an electroluminescent device.

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 emmission color of the electroluminescent device can be changed and the daylight contrast improved.

Abstract: Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.

Abstract: The invention relates to a liquid crystal picture screen provided with a background lighting system which comprises at least one light source and a collimator formed by hourglass-shaped microprisms. The light of the light source can be effectively collimated within a desired angular range by means of the collimator.

Abstract: The invention relates to a liquid crystal picture screen provided with a background lighting system which comprises a white light source. The light source emits white or substantially white light which is composed of more strongly saturated primary colors.

Abstract: Light-emitting devices are disclosed that comprise a light source emitting first light, a first material substantially transparent to and located to receive at least a portion of the first light, and particles of a second material dispersed in the first material. The second material has an index of refraction greater than an index of refraction of the first material at a wavelength of the first light. The particles of the second material have diameters less than about this wavelength. Particles of a third material may also be dispersed in the first material.

Abstract: The invention describes an electroluminescent device wherein the device is characterized by a light emitting layer (3) comprising quantum dots. The quantum dots are provided with capping molecules with functional units on the quantum dot surfaces which cause excited state injection into the quantum dots. The capping molecules with functional units comprise electron transport moieties and/or hole transport moieties and/or exciton transport moieties, which cause the injection of electrons, holes, and excitons, respectively, to the core of the quantum dots.