Abstract: The disclosure relates to a lighting device (1) that includes (i) a multi-LED chip (2), wherein the multi-LED chip (2) has a plurality of LED light sources (2?) as well as a plurality of regulating elements (2?), wherein each LED light source (2?) is assigned a regulating element (2?) connected in series for regulating the current consumption of the respective LED light source (2?) and together with the regulating element (2?) forms a controllable string (2a, 2b, 2c), wherein each LED light source (2?) is designed to be individually switchable; and (ii) an electrical control unit (3), which has a step-down converter (3a) with a voltage input (3aVin), a feedback input (3aFB) and a voltage output (3aVout) and a microcontroller (3b) with a signal input (3bSin) and a signal output (3bSout).

Abstract: The invention relates to a method for producing a housing (7) enclosing a control unit (8) by mechanically forming a starting material (1), wherein the control unit (8) is configured to control particularly a vehicle headlight, comprising the following steps: a) providing an essentially strip-shaped, preferably metal starting material (1), wherein the starting material (1) is subdivided into at least three subareas (4, 5, 6) adjacent to one another, which are separated by fold axes (11, 13); b) forming cooling fins (4a) on a first subarea (4); c) forming a housing bottom (5a) on a second subarea (5); d) forming a housing cover (6a) on a third subarea (6); e) carrying out a folding operation, in which the first subarea (4) is folded about the first fold axis (11) onto the second subarea; f) attaching the control unit (8) to the second subarea (4) [sic]; g) carrying out a folding operation, in which the third subarea (6) is folded about the second fold axis (13) onto the second subarea; h) fixing the first s

Abstract: The invention relates to a method for producing a housing (7) enclosing a control unit (8) by mechanically forming a starting material (1), wherein the control unit (8) is configured to control particularly a vehicle headlight, comprising the following steps: a) providing an essentially strip-shaped, preferably metal starting material (1), wherein the starting material (1) is subdivided into at least three subareas (4, 5, 6) adjacent to one another, which are separated by fold axes (11, 13); b) forming cooling fins (4a) on a first subarea (4); c) forming a housing bottom (5a) on a second subarea (5); d) forming a housing cover (6a) on a third subarea (6); e) carrying out a folding operation, in which the first subarea (4) is folded about the first fold axis (11) onto the second subarea; f) attaching the control unit (8) to the second subarea (4) [sic]; g) carrying out a folding operation, in which the third subarea (6) is folded about the second fold axis (13) onto the second subarea; h) fixing the first sub

Abstract: A circuit arrangement (1) for generating a reference voltage (Uref) for the power supply (2) of an LED arrangement (LED), wherein the power supply supplies a feed current (IS) to the LED arrangement on the basis of an input voltage (UB), which current is determined by the magnitude of the reference voltage, wherein the circuit arrangement comprises: a first voltage divider (R1/R2), located on a constant power supply voltage (UV), a second voltage divider (R3/R4), located on the input voltage (UB) of the power supply (2), and a third voltage divider (R5/R6) which consists of an ohmic resistor (R5) and a temperature-dependent resistor (R6) thermally coupled to the LED arrangement, a voltage proportional to the voltage on the centre connection of the second voltage divider (R3/R4) is supplied via a first diode (D1) to the centre connection of the first voltage divider (R1/R2), a voltage proportional to the voltage on the centre connection of the third voltage divider (R5/R6) is further supplied via a second diod

Abstract: A circuit arrangement (1) for generating a reference voltage (Uref) for the power supply (2) of an LED arrangement (LED), wherein the power supply supplies a feed current (Is) to the LED arrangement on the basis of an input voltage (UB), which current is determined by the magnitude of the reference voltage, wherein the circuit arrangement comprises: a first voltage divider (R1/R2), located on a constant power supply voltage (Uv), a second voltage divider (R3/R4), located on the input voltage (UB) of the power supply (2), and a third voltage divider (R5/R6) which consists of an ohmic resistor (R5) and a temperature-dependent resistor (R6) thermally coupled to the LED arrangement, a voltage proportional to the voltage on the centre connection of the second voltage divider (R3/R4) is supplied via a first diode (D1) to the centre connection of the first voltage divider (R1/R2), a voltage proportional to the voltage on the centre connection of the third voltage divider (R5/R6) is further supplied via a second diod

Abstract: An X-ray stand includes a device that compensates for distortions caused by weight. The stand includes a horizontal bracket. The device for distortion compensation includes an inclination-angle transmitter that generates an inclination signal as a function of an inclination angle of the bracket. The device also includes a control device that receives the inclination signal from the inclination-angle transmitter, a motor drive that is activated by the control device, and an adjustment device that is driven by the motor drive and is configured to adjust the inclination angle of the bracket. The control device activates the motor drive such that any deviation of the inclination angle of the bracket from a predefined inclination angle is reduced.

Abstract: An X-ray stand includes a device that compensates for distortions caused by weight. The stand includes a horizontal bracket. The device for distortion compensation includes an inclination-angle transmitter that generates an inclination signal as a function of an inclination angle of the bracket. The device also includes a control device that receives the inclination signal from the inclination-angle transmitter, a motor drive that is activated by the control device, and an adjustment device that is driven by the motor drive and is configured to adjust the inclination angle of the bracket. The control device activates the motor drive such that any deviation of the inclination angle of the bracket from a predefined inclination angle is reduced.

Abstract: An X-ray device for creating 3D X-ray images includes a ceiling mount and an X-ray source emitting X-rays. The X-ray source is disposed on the ceiling mount. The X-ray device also includes a first X-ray detector that is connected to the X-ray source via a support bracket. The X-ray source is operable to be moved around an object under examination. The first X-ray detector is operable to be hinged out of a beam path of the X-rays. This provides a greater flexibility in the creation of 3D construction images, in that the X-ray device is not restricted to just one X-ray detector.

Abstract: The invention relates to a suction or ventilation roll of a machine for producing and/or finishing a paper, cardboard, tissue or other fibrous material web (2). Said roll comprises a rotatable, perforated roll jacket (1) and at least one pressure zone (9), which only extends over part of the roll circumference and is formed by a fixed pressure compartment (6) located in the interior of the roll and open towards the roll jacket (1). The pressure compartment (6) is connected to a negative- or excess-pressure source and is sealed in relation to the roll jacket (1) by means of at least one sealing element (7). One aim of the invention is to reduce the noise emissions. To achieve this, a substantially air-tight cover (5), which runs in the direction of the circumference and is located outside the pressure compartment (6), adjoins a sealing element (7), said cover making contact with the roll jacket (1), or being placed at a distance of less than 100 mm to the latter.

Abstract: The invention relates to a suction or blowing cylinder of a machine which is used to produce and/or shape paper, cardboard, tissue or another fibrous material (2). Said cylinder comprises a rotatable, perforated cylinder covering (1) and at least one pressure area (4) which is connected to a lower pressure source or a high pressure source and is sealed in relation to the cylinder covering (1) with the aid of at least one sealing element (5, 6). The invention is characterised in that the sealing element (5, 6) is embodied in a flat-shaped manner and is arranged in the vicinity of the inner wall of the cylinder covering (1).

Abstract: An apparatus for filtering an x-ray beam emitted by an x-ray source comprises a filter, adjustable from a parked position (P) outside of a path of the x-ray beam into a filtering position (F) in the x-ray beam path. A corresponding first sensor device detects when the filter in the filtering position (F), and a corresponding second sensor device detects when the filter in the parked position (P). Further, sensor signals are communicated by the first and second corresponding sensors to an evaluation device. The evaluation device generates a report if the filter is not in at least one of the parked position (P) and the filtering position (F).

Abstract: An apparatus for filtering an x-ray beam emitted by an x-ray source comprises a filter, adjustable from a parked position (P) outside of a path of the x-ray beam into a filtering position (F) in the x-ray beam path. A corresponding first sensor device detects when the filter in the filtering position (F), and a corresponding second sensor device detects when the filter in the parked position (P). Further, sensor signals are communicated by the first and second corresponding sensors to an evaluation device. The evaluation device generates a report if the filter is not in at least one of the parked position (P) and the filtering position (F).