Abstract: A lamp driver for an LED lamp includes a voltage input port which is adapted to connect the lamp driver to a power source. A boost converter circuit is connected to the voltage input port. A voltage output port is adapted for connecting an LED to the lamp driver. A shutdown circuit provides a shutdown signal, which is connected to the voltage input port for detecting an input voltage of the voltage input port and is connected to the boost converter circuit for controlling at least one active component of the boost converter. The shutdown circuit is arranged to shut down the boost converter circuit when a shutdown voltage at the voltage input port is detected. During the shutdown of the boost converter circuit, the voltage output port still provides an operation voltage for the LED.

Abstract: A light fixture comprises two cooling elements and a plurality of semiconductor lighting elements, wherein each cooling element has a central portion and a wall portion which extends away from the central portion and at least partially surrounds an interior of a cooling element. The two cooling elements are arranged opposite one another. An annular opening for exchange of air with the environment is present between the two cooling elements. The semiconductor lighting elements are arranged on the outside of the wall portion of the cooling elements. A corresponding cooling element has two or more vanes, wherein all vanes are connected to one another by means of a central connecting element. Each vane extends in an axial direction and in a circumferential direction and has a curvature in the axial direction and preferably a curvature in the circumferential direction.

Abstract: Semiconductor lamp having a straight, translucent tube whose open end faces can be closed by means of respective end caps, which end caps are plug-connected to the tube, a circuit board which is equipped with at least one semiconductor light source is installed in the tube and is in contact with at least one of the end caps, wherein both end caps are mechanically connected to one another by means of a connection element running in the tube, at least one of the end caps is arranged such that it can be displaced longitudinally with play with respect to the tube and thermal expansion of the connection element in a longitudinal direction of the tube is smaller than thermal expansion of the tube and wherein the connection element is snap-fitted to at least one of the end caps. The invention can for example be used for retrofit or replacement lamps for conventional elongate lamps (e.g., fluorescent lamps and tube lamps).

Abstract: The lamp includes a substantially transparent housing tube, a first end cap at a first end of the housing tube and a second end cap at a second end of the housing tube. The end caps include contacts for electrically contacting a power supply. An LED-filament is arranged in the housing tube between the first end cap and the second end cap.

Abstract: An LED driver and a driving method thereof include at least two sub-LED drivers connected in series between two terminals of an AC power source. The at least two sub-LED drivers have a common configuration. Each sub-LED driver includes a switch circuit having a first reference ground, an inductor having a first terminal connected to the first reference ground and a first capacitor. The first capacitor has a first terminal connected to a second terminal of the inductor and a second terminal connected to a second reference ground. A load with at least one LED to be driven is connected between the first terminal and the second terminal of the first capacitor. An inductance value of the inductor is designed such that each sub-driver operates in an open loop mode. The LED driver and the driving method thereof can achieve an output current balance between the respective sub-LED drivers.

Abstract: A lamp includes a base with at least two electrical connecting elements. A bulb is rotatably mounted relative to the base. A light engine is arranged in the bulb with at least one light-emitting element and an electrically conductive substrate on which the light-emitting element is arranged. An electronic driver is connected to the electrically conductive substrate for activation of the light-emitting element. The base has a base sleeve in which the electronic driver is arranged. The electrically conductive substrate has a flexible connecting section between the electronic driver and the light-emitting element.

Abstract: The present invention relates to a lighting means comprising at least two LEDs mounted on opposite sides of a flat printed circuit board, said printed circuit board being combined with a reflector which is free of LEDs, a part of the light emitted by each LED being reflected by the reflector to homogenize the light distribution generated by the lighting means, and specifically in each case with a directional component parallel to a surface direction of the flat printed circuit board.

Abstract: A semiconductor lamp includes a housing with a cavity to accommodate a light source, preferably an LED, and a driver for the light source. The housing has at least one injection channel for injection of an encapsulation material into the cavity of the housing. A semiconductor lamp is produced by providing a housing with a cavity and inserting a driver and a light source into the cavity. Following the insertion of the driver and the light source into the cavity, an encapsulation material is introduced into at least a part of the cavity through at least one injection channel of the housing.

Abstract: A light fixture has a housing having a depression in which at least one light-emitting diode is received. The light-emitting diode is mounted on a mounting surface and in operation of the light fixture emits light with an initial emission angle of more than 80°. A lens is arranged downstream of the light-emitting diode, having a central focus area and an outer area radially surrounding the focus area. The central focus area is configured and/or arranged in such a way that a part of the light propagating through the focus area is focused in such a way that a final emission angle of the light propagated through the focus area is at least 50° and at most 80°. The outer area of the lens is spaced at least 2 mm from the mounting surface in a vertical direction.

Abstract: A retrofit lamp comprises a heat sink, a light source module with a circuit board, whose rear side lies two-dimensionally on the heat sink and at the front side of which at least one semiconductor light source is arranged, and a ring partially covering the front side of the light source module, wherein the ring presses the light source module onto the heat sink. A method serves for producing a retrofit lamp, wherein the rear side of the circuit board of the light source module is laid on the heat sink and the ring is put on the retrofit lamp from the front such that it presses the light source module onto the heat sink. The invention is particularly applicable to LED retrofit lamps for replacing conventional light bulbs or halogen lamps.

Abstract: A lighting device comprises a holder for LED filaments. The holder has a first electrically conductive holding structure and a second electrically conductive holding structure. Each holding structure comprises an essentially longitudinal connection section and an attachment section essentially perpendicular to the connection section.

Abstract: A lighting device is provided, comprising at least one LED module, which is connected to a retainer, and a driver that is electrically connected to the LED module, wherein the driver is at least partially cast by a potting material wherein the driver is connected to the retainer via an adaptor board that is positioned in between the driver and the retainer.

Abstract: The LED driving circuit includes: a detecting circuit that detects whether an input current of the driving circuit is low or high frequency; a first stage converter that converts the input of the driving circuit to provide a DC power suitable for the LED; a first feedback loop that is activated by a low frequency current, to convert a current from a LED load to a feedback voltage and feed it back to the first stage converter, wherein in the first feedback loop, the feedback voltage changes as a function of the current of the LED load; and a second feedback loop that is activated by high frequency current, to convert the current from the LED load to the feedback voltage and feed it back to the first stage converter, wherein in the second feedback loop, the feedback voltage changes as a function of the current of the LED load.

Abstract: A lighting device for room lighting in photolithography applications (in particular a retrofit lamp in sizes T5 and T8) comprises a light engine having a first light source which is configured to emit light in the wavelength range above approximately 500 nm and a second light source which is configured to emit light in a different wavelength range from the first light source. The first light source produces light in a spectral range within which photoresists used in photolithography are not sensitive. The second light source produces white light (either alone or in combination with the first light source).

Abstract: The present invention relates to a connector device for an illumination apparatus and an illumination apparatus comprising this connector device. The connector device comprises a stationary element for connecting to the illumination apparatus, a first movable element for connecting to a power supply, a second movable element rotatably connected to the stationary element, and a locking element arranged between the stationary element and the second movable element, wherein rotation of the second movable element in a first direction drives the locking element to release locking of the second movable element, and when the second movable element continues to be rotated in the first direction and drives the first movable element to rotate together, rotation of the first movable element enables the locking element to release locking of the first movable element.

Abstract: The present invention relates to an illuminating device and a method of assembling the illuminating device, wherein the illuminating device comprises a tubular casing, an electrical connector connected with the casing, a drive unit at least partially received in the electrical connector, and a light-emitting unit received in the casing, wherein the light-emitting unit comprises a carrier, wherein the electronic parts of the drive unit and the light-emitting parts of the light-emitting unit are arranged on the carrier.