Abstract:
The invention relates to a method and a device for driving an LED string of a first LED segment (11) and at least one further LED segment (12, 13, 14) connected in series. Each LED segment has at least one light emitting diode, LED. The LED string is powered by a rectified AC mains voltage. The first LED segment (11) is powered when the rectified AC mains voltage is above a first voltage level, and the first LED segment and the further LED segment are powered when the rectified AC mains voltage is above a second voltage level higher than the first voltage level. The first LED segment emits light having a first color temperature, and the further LED segment emits light having a second color temperature higher than the first color temperature. The light emitted by the first LED segment and the light emitted by the further LED segment are superimposed. The color temperature change of the light emitted by the LED string, when dimmed, resembles the color temperature change of an incandescent lamp.
Abstract:
A light-emitting module (3a-c; 23; 26; 33a-c) comprising a plurality of light- sources (12a-e; 27a-h) arranged in at least a first and a second column (18a-b; 28a-c) arranged side by side and extending along a first direction of extension (X 1 ) of the light- emitting module (3a-c; 23; 26; 33a-c); and a plurality of connector terminal pairs (13a-b, 14a-b, 15a-b, 16a-b 17a-b), each being electrically connected to a corresponding one of the light-sources (3a-c; 23; 26; 33a-c) for enabling supply of electrical power thereto. Each connector terminal pair (13a-b, 14a-b, 15a-b, 16a-b 17a-b) comprises a first connector terminal (13a, 14a, 15a, 16a 17a) and a second connector terminal (13b, 14b, 15b, 16b 17b) being arranged at opposite sides of the light-emitting module (3a-c; 23; 26; 33a-c). The light- sources (12a-e; 27a-h) are arranged in a predetermined light-source sequence along the first direction of extension (X 1 ) of the light-emitting module (3a-c; 23; 26; 33a-c), and the connector terminal pairs (13a-b, 14a-b, 15a-b, 16a-b 17a-b) being electrically connected to the corresponding light-sources (12a-e; 27a-h) are arranged in the predetermined light-source sequence along the first direction of extension (X 1 ) of the light-emitting module.
Abstract:
An illumination system (10) for spot illumination comprising a tubular reflector (2) with a reflective inner surface, the tubular reflector (2) having an entrance aperture (7) and an exit aperture (8) being larger than the entrance aperture (7); a light-source array(1) comprising a plurality of light-sources (13a-c; 30a-d, 31a-d, 32a-d) arranged to emit light into the tubular reflector (2) at the entrance aperture thereof; and a light-diffusing optical member (9) arranged to diffuse light emitted by the illumination system (10). The light-diffusing member (9) is configured to exhibit an increasing diffusing capability with increasing distance from an optic axis (12) of the illumination system.
Abstract:
In a microfluidic biosensor device comprising a reader device and a removable cartridge, energy generated when inserting the cartridge into the reader device is stored in an energy storage means. At least two actuator means connected to the energy storage means separately actuate energy consuming units in the biosensor device, such as pumps, valves or switches. Accordingly, different energy consuming units may be provided with energy from the energy storagedevice in a successive or stepwise way and at different times.
Abstract:
The invention relates to a sensor probe (100,110,120,130,140,150) for detecting an environmental state within a bodily lumen. The sensor probe (100,110,120,130,140,150) having an elongated body (9) comprises an optical guide (1) having an outcoupling surface (11),which is part of an end surface (3) of the elongated body (9), facing a reflective surface of an overhanging part (22,42,52,62), a photodetector which detects a property of light which is composed of light (32) in the optical guide (1) that is reflected from the outcoupling surface (11) of the optical guide (1) and of light (33) in the optical guide (1) that is reflected from the overhanging part (22,42,52,62), and a hydrogel material(2) of which a property changes when getting into contact with an environmental material and/or when detecting an environmental change, and which is provided between the end surface (3) of the elongated body (9)and the overhanging part (22,42,52,62). In this way a sensor probe (100,110,120,130,140,150) is provided that, because of its compactness, can be applied inside the bodily lumen for detecting and characterizing parameters that are vital indicators for the state of the human or animal body, and to which the hydrogel material (2) is responsive.
Abstract:
A micro-fluidic device (1) comprising internal actuation elements controlled by a two-dimensional arroy of a plurality of first electronic components (2) for processing a fluid and/or for sensing properties of the fluid is suggested. The active matrix includes a two- dimensional array of second electronic components realized in thin film technology. The active matrix provides a high versatility of the device. The thin film technology ensures very cost efficient manufacturing also of large devices.
Abstract:
A system is described for estimating a level of stress or tiredness that a person is experiencing. The system comprises measurement means (10) for performing a plurality of eye movement measurements of the person during a time interval and accumulating means (20) for accumulating the measurements and determining a spectral distribution thereof. It further comprises analyzing means (30) for estimating the level of stress based on the spectral distribution.
Abstract:
The invention provides an ink jet device for producing a biological assay substrate. The device releases a plurality of substances onto the substrate from print heads, provided with the substances. The device further comprises means to subject the printed substrates to an accelerated motion. The accelerated motion which acts about perpendicular to the surface of the substrates acts to control penetration of the substances into the substrate. The invention also relates to a method for producing a biological assay substrate, and to a biological assay substrate obtainable by such method.
Abstract:
This invention provides a biosensor solid or hydrogel substrate comprising one or more temperature indicating agents, each of said one or more temperature indicating agents operating by changing its optical properties and being deposited in and/or at the surface of the biosensor solid or hydrogel substrate as one or more layers and/or spots
Abstract:
The invention relates to a substrate material for analyzing fluids which has first areas with a high porosity and second areas with a lower porosity.