Abstract:
The invention relates to an illumination system (50), a beam-control element and a light source (30). The illumination system comprises the light source for emitting a light beam and a beam-control element for controlling the shape and/or direction of the light beam. The beam-control element comprises a resilient layer (2a) and a further layer (4a) being arranged substantially parallel to each other, the resilient layer comprising a relief (21) on a surface of the resilient layer arranged substantially parallel to the further layer, or the further layer comprising the relief on a surface of the further layer facing the resilient layer. The illumination system further comprises moving means (52) for moving the resilient layer and the further layer with respect to each other for reducing the relief by applying a pressure between the resilient layer and the further layer. The relief controls the shape and/or direction of the light-beam. When the relief is reduced by applying pressure, the light beam is substantially unaltered by the beam-control element.
Abstract:
A color conversion device (10; 20; 30; 40; 51; 60), for adjusting a color of light emitted by a light-source, the color conversion device comprising a beam-shaping member (11; 54; 61; 70; 80; 90; 100) configured to change a shape of a beam of light interacting with the beam-shaping member; and at least a first wavelength converting member (12; 22a-b; 31; 41a-b; 56; 62a-g) configured to absorb light having a first wavelength distribution, and, in response thereto, emit light having a second wavelength distribution, different from the first wavelength distribution. The beam-shaping member (11; 54; 61; 70; 80; 90; 100) is controllable to direct a first fraction of the beam of light towards the first wavelength converting member (12; 22a-b; 31; 41a-b; 56; 62a-g), where a wavelength distribution of the first fraction is converted, thereby enabling color adjustment of the beam of light.
Abstract:
A device (201) for controlling shape and direction of light, comprises a first transparent planar substrate (203) and a second transparent planar substrate (205), the substrates being configured for arrangement essentially perpendicular to incident light beams (211), a liquid crystal layer (209) arranged between the first and second substrate, a first transparent electrode pattern (207) arranged on the first substrate and a second transparent electrode pattern (217) arranged on the second substrate, and control means configured to adjust an electric potential difference between the first and second electrode patterns, thereby configured to adjust a refractive index of the liquid crystal layer.
Abstract:
The invention provides a light module (1) arranged to produce a beam of light (25) with a scattering pattern that is electrically variable. The module comprises a light source (2) arranged to provide a beam of light (5); and an electrically adjustable optical element (300) arranged to adjust the beam of light (5) from light source (2). The adjustable optical element comprises a first cell (10) with a first liquid crystal gel (11); optionally a polarization rotator (30); a second cell (20) with a second liquid crystal gel (21); and a unit 40 for applying a voltage across at least one of the first and second cells (10,20). Especially, the light module (1) provides a beam of light (25) with an anisotropic light distribution.
Abstract:
A method for manufacturing a polarizer is disclosed. The method comprises: providing a liquid crystalline mixture comprising reactive molecules, non-reactive molecules, dichroic dye molecules, and a polymerization initiator; providing a uniaxially oriented film of said mixture; polymerizing said film; and removing at least part of said non-reactive molecules. Also disclosed are polarizers manufactured by such a method, as well as optical devices comprising such polarizers.
Abstract:
An illumination system has a first transparent element (1) and a second transparent element (2). The first transparent element has a light-dispersing structure (7) for broadening an angular distribution of light propagating from the first to the second transparent element via the light-dispersing structure (7). The light-dispersing structure has a fixed refractive index n 1 . The second transparent element has a refractive index n 2 being electrically adaptable. Preferably, the second transparent element is a liquid crystal layer. Preferably, the light-dispersing structure is in direct physical contact with the second transparent element. Preferably, the light-dispersing structure is a holographic diffuser, an array of micro-lenses or Fresnel-lenses.
Abstract:
A method of manufacturing an optical integrator panel is provided. The method comprises the steps of: suspending a plurality of elongate particles in a liquid; applying an electric or magnetic field to the suspension to orientate the particles with parallel longitudinal axes; and solidifying the liquid to fix the orientation of the particles, thereby forming an optical integrator panel having a homogeneous distribution of elongate particles. An optical integrator panel is also provided. The optical integrator panel is adapted to reduce the angular dependence of contrast of a liquid crystal display. Specifically, the optical integrator panel is for placement in the path of reflected or transmitted light emitted by the liquid crystal display. The optical integrator panel comprises: a solid transparent panel; and a plurality of elongate particles homogeneously distributed in the panel, wherein the plurality of elongate particles are orientated with parallel longitudinal axes.
Abstract:
The invention relates to a matrix of electroluminescent organic material having quantum dots embedded therein. Electrodes provide electrons and holes to the matrix forming excitons to be transferred to the quantum dots. The invention provides transfer molecules on the quantum dots facilitating the transfer of excitons from the electroluminescent organic material to the quantum dots, by first transferring them to the transfer molecules. The transfer molecules are chosen to make a transfer rate of excitons from the organic material to the transfer molecules larger than a decay rate of excitons in the organic material. More specifically, the organic matrix forms a light emitting layer in a light emitting device (LED). Also, the electroluminescent organic material is preferably an electroluminescent polymer.
Abstract:
The invention relates to a compound for applying additives to fabrics, comprising a carrier liquid,a binder and microcapsules dispersed in said carrier, each microcapsule comprising: a core provided with at least one additive and a coating encapsulating said core at least partially. The invention also relates to a fabric provided with such microcapsules. Additionally, the invention relates to a method of preparing such microcapsules. Furthermore, the invention relates to a method of applying additives to fabrics by using such a compound.
Abstract:
The invention refers to an optical information carrier (1) for carrying information to be read out by means of an optical beam (9) having at least one information layer (6). It is an object of the invention to provide information carriers (1) with improved collection efficiency. To achieve this object the at least one information layer (1) contains Bragg reflectors for reflecting light of the optical beam (9), when said Bragg reflector is heated above a reflectance threshold temperature by said optical beam.