Abstract:
A method for improving the uniformity of at least one optical property of a tiled OLED lighting source comprising at least two OLED tiles, the method comprising : applying electrical power to the OLED tiles with a power proving means, the power providing means comprising a control means adapted for controlling the electrical power to each of the OLED tiles, measuring at least one optical property of each of the OLED tiles as a function of their respective electrical power to determine at least one electro -optical property of each OLED tile, modifying the control means using the electro -optical properties for compensating the effect of the variation of the electro- optical properties on the uniformity of the optical properties of the OLED tiles.
Abstract:
The invention relates to a passive matrix display (10,10') for displaying at least one predetermined sign (15,15'), comprising a carrier element (20) and a cover element (30), a plurality of elongated and generally parallel arranged conductive first strip- elements (21) and second strip-elements (31), a plurality of pixel elements (40), wherein the first strip-elements (21) and the second strip-elements (31) form a grid like structure (50), wherein the pixel elements (40) are connected to the grid like structure (50) and wherein the pixel elements (40) are only applied to those crossings of the first strip- elements (21) and the second strip-elements (31), necessary to form the at least one predetermined sign (15,15').
Abstract:
Devices (10) for driving loads (20) such as organic/inorganic light emitting diodes are provided with drivers (11) for driving the loads (20), with converters (12) for converting first parameter signals defining parameters of the loads (20) into second parameter signals each being defined by one bit per time interval, and with digital controllers (13) for controlling the drivers (11) in response to the second parameter signals. The converter (12) may comprise a comparator circuit (40) and a timer circuit (41) for comparing the first parameter signal with a reference signal and for generating the second parameter signal having a respective first or second value of two possible values in case of a respective first or second comparison result. The parameter may be a current flowing through or light emitted by at least a part of the load (20). The driver (11) may be a buck / boost / buck boost / fly back converter.
Abstract:
A driver circuit receives a three-phase AC voltage through three input terminals. The driver circuit has a bridge type three-phase switching circuit having three upper and three lower switching elements. The upper switching elements are connected to one of two DC output terminals, and the lower switching elements are connected to the other one of the two DC output terminals. A diode is connected between the output terminals. Sequentially, one of the upper switching elements in a predetermined phase is conducting current while the two lower switching elements of other phases alternately conduct current, and one of the lower switching elements in a predetermined phase is conducting current while the two upper switching elements of the other phases alternately conduct current.
Abstract:
The invention provides an illumination arrangement (1) for illuminating horticultural growths (100) with for instance LEDs as a light source. These LEDs are placed in a lighting unit (10). The lighting unit may especially have the ability to direct substantially all light from the light source (here the LEDs) to the horticultural growths (in the greenhouse). Additionally, a horticultural growth-recognition system (50) can be implemented in the illumination arrangement, so that the system can adapt for instance its beam (11) to the location of the horticultural growth (s) (in the case of growth or moving of plants, etc).
Abstract:
The invention relates toa set ofmultiple OLED devices(1)and an interface (2) for electrically contacting the OLED devices (1), wherein each OLED (1) device is separately encapsulated, and wherein the interface(2)is adaptedfor contacting different types of encapsulated OLED devices (1).This way, a possibility for customized OLEDs, also in bigger sizes, in aneasy, convenient and inexpensive way is provided.
Abstract:
Arrangements (2-5) for generating light in a relatively fail-safe way are provided with first generators (2) such as first groups of light emitting diodes (200-249) for generating first light in first modes and with second generators (3) such as second groups of light emitting diodes (300-304) for generating second light in second modes and with detectors (4) for detecting problems with one of the generators (2-3) and with switches (5) for in response to detected problems switching the arrangement (2-5) between the modes. The first generators (2) are connected via first couplings to first power sources (6) such as mains supplies and the second generators (3) are connected via second couplings to second power sources (7) such as battery supplies. The first and second groups may be interleaved and/or stacked groups. Devices (1) comprise arrangements (2-5) for displaying different or the same information in both modes.
Abstract:
The present invention relates to a method for determining a status and/or condition of an LED/OLED device 10, comprising the steps of: applying at least one time varying signal 22 to the LED/OLED device, acquiring the response 24 to said at least one time varying signal, correlating said response with predetermined values 30, and determining the status/condition 32 on the basis of the correlation result. Further, the present invention relates to a device adapted to carry out the inventive method.
Abstract:
PH007456 18 ABSTRACT: The present invention relates to a method for determining a status and/or condition of an LED/OLED device10, comprising the steps of: applying at least one time varying signal 22 to the LED/OLED device, acquiring the response 24 to said at least one time varying signal, correlating said response with predetermined values30, and determining the status/condition 32on the basis of the correlation result. Further, 5 the present invention relates to a device adapted to carry out the inventive method.
Abstract:
The present invention relates to a modular electric system with a base module (2, 11) comprising a substrate (3, 12), a power supply (40), power/data transmission means (4, 16) and holding means; at least one load module (7, 20, 30) comprising an electric load, a power/data receiving means (8, 26) and a holding means, said load module (7, 20, 30) being adapted to be placeable on said substrate (3, 12) in first and second positions, wherein in said first position (connecting position) the transmission means (4, 16) of said base module interact with said receiving means (8, 26) of said load module (7, 20, 30) and in said second position (repelling position) interaction of said transmission means (4, 16) and said receiving means (26) is not allowed or possible. The modular electric system is characterized in that said holding means of said base module and said load module comprise magnet elements (5, 9, 49, 59) which are arranged relative to each other such that the load module (7, 20, 30) is removably held in said first position and is not held in said second position.