摘要:
The disclosed embodiments relate to a luminaire (100) comprising an array of LEDs (120). The array of LEDs (120) comprises LEDs chosen from the group of blue LED, green LED, red LED, yellow LED, amber LED, cyan LED, and white LED. The luminaire (100) further comprises a reflecting tube (140) and said array of LEDs (100) is arranged in an entrance aperture (142) of said reflecting tube (140). At least one light source (160) is arranged circumferentially around the reflecting tube (140). The at least one light source (160) comprises at least one LED chosen from the group of deep blue LEDs, royal blue LEDs, deep red LEDs and UV LEDs. An optical component (170), is arranged to transmit light emitted from the at least one light source (160) into light emitted from the array of LEDs (120).
摘要:
A series arrangement of LED loads (LP1-LP4) is coupled between output terminals of a rectifier having its input terminals coupled to a mains supply supplying a low frequency AC voltage. Control means render the LED loads conductive one by one, when the amplitude of the supply voltage increases, and non-conductive one by one when the amplitude of the supply voltage decreases. The first LED load (LP1, LP2) has a forward voltage that is substantially higher than that of the other LED loads. As a consequence, the LED utilization is comparatively high, thus allowing the LED loads used in the series arrangement to be comparatively cheap.
摘要:
Driver device and a corresponding driving method for driving a load, in particular an LED assembly comprising one or more LEDs. To provide a better performance, better cost-efficiency, improved power factor and reduced losses, a driver device (1,1′, 2, 2′) is provided comprising a rectifier unit (10) for rectifying a received AC supply voltage (VS), load terminals (20) for providing a drive voltage (VL) and/or a drive current (IL) for driving said load, a capacitive storage unit (30) coupled between said rectifier unit and said load terminals for storing electrical energy provided by said rectifier unit and providing electrical energy to said load, and a bridge switching unit (40) coupled between said rectifier unit and said load for switching said capacitive storage unit into a load current path from said rectifier unit to said load terminals with a desired polarity and for switching said capacitive storage unit out of said load current path.
摘要:
Driver device and a corresponding driving method for driving a load, in particular an LED assembly comprising one or more LEDs. To provide a better performance, better cost-efficiency, improved power factor and reduced losses, a driver device (1,1′, 2, 2′) is provided comprising a rectifier unit (10) for rectifying a received AC supply voltage (VS), load terminals (20) for providing a drive voltage (VL) and/or a drive current (IL) for driving said load, a capacitive storage unit (30) coupled between said rectifier unit and said load terminals for storing electrical energy provided by said rectifier unit and providing electrical energy to said load, and a bridge switching unit (40) coupled between said rectifier unit and said load for switching said capacitive storage unit into a load current path from said rectifier unit to said load terminals with a desired polarity and for switching said capacitive storage unit out of said load current path.
摘要:
A pen which is able to modulate the trace of the pen in response to a sensory signal of the user, such as for example skin conductance or respiration. The sensory signals represent the mood of the user. By changing the trace of the pen, a change in mood of the user can be expressed.
摘要:
A lighting device comprising a plurality of light emitting elements (1), and a beam shaping optics (7) having an entrance aperture (6). Each light emitting element is optically connected to a set of optical fibers (5) each having a first end optically connected to the light emitting element and a second end optically connected to the entrance aperture (6), so as to guide collimated light from the light emitting element to the beam shaping optics (7). The light emitting elements are distributed over an area larger than the entrance aperture (6).
摘要:
A system for detecting at least one contamination species in an interior space of a lithographic apparatus, including: at least one monitoring surface configured to be in contact with the interior space, a thermal controller configured to control the temperature of the monitoring surface to at least one detection temperature, and at least one detector configured to detect condensation of the at least one contamination species onto the monitoring surface.
摘要:
A device is disclosed for wireless control of color of light emitted by a lighting system. The lighting system comprises signal receiving means and means for adjusting the color of light emitted from at least one lighting element, in response to a received color control signal from the device. The device for wireless control comprises means for—generating color information data, said data being indicative of a desired color of light to be emitted by the lighting system, means for modulating a first carrier signal in accordance with the color information data, and means for transmitting said color control signal in the form of a beam of said first modulated carrier signal to the lighting system.
摘要:
The present invention is related to a process for providing an assembly of cell microcarriers, comprising the steps of providing planar, two-dimensional objects having two sides (“flakes”), wherein these objects comprise a material which, upon application of an extrinsic stimulus, is transferred from the planar state into a rolled state, providing cells on one side of said flakes (“cell-bearing side”), transferring the flakes from the planar state into a rolled state (“cell wrap”) by application of said extrinsic stimulus, and coupling at least one type of binding agent to the flakes.
摘要:
The application is directed to a sensor element for use in a magnetochemical sensor, which comprises a first gel-like material (10), especially a swellable hydrogel such as polyacrylamide, and a magnetic second material (20) in the form of particles, especially magnetite (Fe304) nanoparticles, embedded in the first material along with a receptor for an alalyte, eg glucose. Changes in magnetic field due to interaction with the analyte are detected with GMR element (50). Applications include biosensors, DNA testing devices, and high throughput screening.