摘要:
In a method and a driver circuit for operating one or more light emitting diodes, LEDs, an alternating supply current is generated and transformed to an alternating secondary winding voltage. Using rectifier means, such as diodes or synchronous switches, the alternating secondary winding voltage is converted to a substantially constant load current by using a buffer element, such as an output choke, i.e. a suitable inductor. The power transferred from the power source to the LEDs may be controlled by frequency control of the alternating supply current.
摘要:
The invention relates to an electrical system (1) with a light emitting device (10) with a first (11) and a second electrode (12) and a light emitting element (13) being provided between the first (11) and the second electrode (12), a heating device (20) with a heating element (21,11,12), wherein the light emitting device (10) and the heating device (20) are placed between a first (30) and a second panel (31), wherein at least one panel (30,31) is transparent, wherein the heating element (21,11,12) is disposed in an electric circuit in order to emit heat radiation (41), which is generated by the heating element (21,11,12) and directed to the first and/or the second panel (30,31), wherein the light (40), which is generated by the light emitting device (10), and the heat radiation (41) are released at one outer surface (33,34) leaving the electrical system (1).
摘要:
The invention relates to a light emitting device (1) with an electronic driver (10) and a planar light emitting element (20), wherein the driver (10) is connected with a source (2) and the light emitting element (20), wherein the light emitting element (20) having an internal capacitance (21) is connected to said driver (10) in such a way that the internal capacitance (21) serves as a passive output filter of the driver (10).
摘要:
A power supply circuit for providing an output voltage that is higher than an input voltage. The power supply circuit is comprised of a bridge circuit and a resonant circuit, and is coupleable to a power source and a load circuit. The power supply circuit provides a boost function for stepping up an input voltage in order to reduce the required number of battery cells in order to power a load, such as a series of LEDs.
摘要:
An OLED device comprised of: an OLED means for generating light, two or more conductive elements adapted for conducting current, a first substrate for mounting the OLED means and the two or more conductive elements, wherein the substrate has a first surface and a second surface, wherein the OLED means is in contact with the first surface and the two or more conductive elements are mounted to the second surface.
摘要:
The invention relates to a Reflector pole (1), which is used as a road marker, a road boundary, a sign pole or for similar applications related to road or pedestrian traffic, comprising a main body (2), featuring at least one light active field (3). According to the invention the light active field (3) comprises an organic light emitting diode (OLED) (4).
摘要:
The invention relates to an electroluminescent device for emitting light having an adjustable color point. An electroluminescent region (1) emits light in response to a lighting current and a heating element (7) applies heat to the electroluminescent region A heating control unit (9) controls the heating element (7) in applying the heat in order to adjust the color point of the emitted light. The color point of the light emitted by the electroluminescent device is dependent on the temperature of the electroluminescent region (1). Since the electroluminescent device comprises a heating element (7) for applying heat to the electroluminescent region (1) and a heating control unit (9) for controlling the heating element (7) in applying the heat, the color point can be adjusted in a simple way by using the heating control unit (9).
摘要:
The invention relates to an organic light emitting diode segment (100) comprising two organic light emitting diodes (102; 104), wherein the organic light emitting diodes are vertically stacked with their conducting directions pointing in opposed directions, wherein in the stack the organic light emitting diodes (102; 104) are electrically connected to each other by a common shared electrode (112).
摘要:
The present invention relates to a LED light source comprising at least one layer of light emitting material (3), in particular organic light emitting material, sandwiched between two electrode layers (2, 4). At least one of the electrode layers (2, 4) is structured to form a pattern of electrode segments (5), each electrode segment (5) being in electrical contact with at least three of its nearest neighbor electrode segments (5) via direct electrical connections (6), which are designed to act as electrical fuses between the electrode segments (5). The invention allows the design of a large area LED light source having a homogeneous light density without the risk of failure of larger light emitting areas.
摘要:
The present invention relates to a control module (30) for a lighting system, which lighting system (10) comprises a base module (11) with at least two parallel electrodes (16) and at least one light module (20) coupled with said electrodes (16), said control module comprising: a controller (30) adapted to control at least one parameter of the at least one light module (20), and a holding member (28) adapted to removably hold said control module in engagement with said electrodes (16) of said lighting system (10). It also relates to a lighting system and a light module (20) for such a lighting system.