Abstract: A method for producing an LED film with a cut-off edge is disclosed. The LED film has a film with LED pixels arranged thereon. The LED pixels, which each have at least one LED, are controlled via the data line of a daisy chain, which is arranged in a meandering shape on the film. The method provides for a loop of the meandering shape to be severed and for the thereby produced free ends of the data line to be connected or for a loop of the meandering shape to be bridged and for the edge of the LED film to be subsequently trimmed so that the loop is cut off outside the connection remaining on the LED film. Electrode paths of supply voltage lines are preferably arranged in a matrix shape on the LED film.

Abstract: A computer-implemented method for training a model for recommending threshold values of at least one spatial vibration component of an electric rotary machine. A computer-implemented method for monitoring a status of an electric rotary machine using the trained model. A computer program product with commands for carrying out the methods, a machine-readable storage medium with a computer program product, and a data transmission signal which carries the commands. A sensor and computing facility for monitoring a status of an electric rotary machine which is designed to detect data relating to the operation of the electric rotary machine on the electric rotary machine. The sensor and computing facility has commands which, when executed by the sensor and computing facility, cause the sensor and computing facility to carry out the training method and/or the status monitoring method.

Abstract: A method for operating a lighting device having multiple light sources may include determining a measure of a supply voltage and switching the light sources into one or more parallel strands, wherein the light sources in each strand are connected in series, in each case according to the measured value of the supply voltage. Automatic determination of a number of light sources in at least one of the strands, the number corresponding to the largest whole number which, when multiplied by a specifiable forward voltage of each of the light sources, is less than the measured value of the supply voltage. During switching of the light sources the exact number of light sources determined in the at least one strand is connected in series.

Abstract: A method for operating a lighting device having multiple light sources may include determining a measure of a supply voltage and switching the light sources into one or more parallel strands, wherein the light sources in each strand are connected in series, in each case according to the measured value of the supply voltage. Automatic determination of a number of light sources in at least one of the strands, the number corresponding to the largest whole number which, when multiplied by a specifiable forward voltage of each of the light sources, is less than the measured value of the supply voltage. During switching of the light sources the exact number of light sources determined in the at least one strand is connected in series.

Abstract: A method for operating a lighting device which has a plurality of light sources includes ascertaining a measure of a supply voltage, switching the light sources into one or more parallel strings. The light sources are in each case connected in series in each string, depending on the supply voltage. The method further includes automatically ascertaining a number of light sources in at least one of the strings. The number corresponds to the largest integer number which, multiplied by a prespecifiable forward voltage of each of the light sources, is less than the supply voltage. When the light sources are switched into the at least one string precisely the number of light sources are connected in series. A switch is connected in parallel with each of the light sources, and either a variable resistor or a variable resistor is connected in series with each string of light sources.

Abstract: An LED includes a first active region for the emission of a first primary radiation and a second active region for the emission of a second primary radiation, separate connections, a first phosphor for the at least partial conversion of the first primary radiation into a first conversion radiation in such a way that the first phosphor forms a first emitting surface of the LED for the emission of a first illumination radiation, and a second emitting surface for the emission of a second illumination radiation, which has a different spectral profile than the first illumination radiation, the second illumination radiation originating from the second primary radiation, and the emitting surfaces being shaped and arranged in a plan view, looking at the LED counter to a main emitting direction thereof, such that an outer of the emitting surfaces as a continuous surface area encloses an inner of the emitting surfaces.

Abstract: A light emitting unit driving circuit may include: an operating voltage supplying unit configured to supply a voltage input for the driving circuit; a driving unit coupled to the operating voltage supplying unit and configured to drive the light emitting unit to make the light emitting unit turn on or turn off; and a feedback control unit coupled between the driving unit and the light emitting unit, and configured to form a feedback loop together with the driving circuit and the light emitting unit to stabilize an operating current of the light emitting unit.

Abstract: A method for operating a gas discharge lamp featuring a gas discharge lamp burner and a first and a second electrode, wherein the electrodes have a nominal electrode separation in the gas discharge lamp burner before their first activation and said nominal separation is correlated to the lamp voltage. The method may include checking whether the off-time, corresponding to the time duration between two DC voltage phases, has expired; and if the off-time has expired, omitting commutations or applying pseudo-commutations for a predefined time duration which depends on the lamp voltage in such a way that a time duration of the omission of at least one of commutations and application of pseudo-commutations is predefined for each lamp voltage.

Abstract: A light emitting unit driving circuit may include: an operating voltage supplying unit configured to supply a voltage input for the driving circuit; a driving unit coupled to the operating voltage supplying unit and configured to drive the light emitting unit to make the light emitting unit turn on or turn off; and a feedback control unit coupled between the driving unit and the light emitting unit, and configured to form a feedback loop together with the driving circuit and the light emitting unit to stabilize an operating current of the light emitting unit.

Abstract: The invention relates to a method for operating a gas discharge lamp, in which the shape of at least one electrode of the gas discharge lamp is changed, in which by changing the lamp current for a predeterminable duration, at least one current pulse is generated such that structures which have grown on the at least one electrode are at least partially removed, the current pulse being generated for the duration of at least one entire half cycle of the AC voltage or the alternating current if the gas discharge lamp is fed AC voltage or alternating current, and the current pulse being generated with a pulse duration of between approximately 0.1 s and approximately 5 s if the gas discharge lamp is fed DC voltage or direct current.

Abstract: An electronic ballast for driving at least one light source may include an input for connecting a supply voltage; an output configured to connect the at least one light source; an oscillator, which is designed to provide an oscillator output signal with a first frequency at its output, the oscillator having a calibration input in order to alter the first frequency; and a microcontroller configured to provide a drive signal with at least one spectral component at a second frequency for the at least one light source, the microcontroller being coupled to the oscillator output and being designed to generate the second frequency as a function of the first frequency; wherein the electronic ballast furthermore includes a drive circuit, which is coupled to the calibration input, the drive circuit being designed to vary the first frequency during running operation of the electronic ballast via the calibration input.

Abstract: A circuit arrangement for operating a discharge lamp is provided. The circuit arrangement may include a commutating device, which is configured to exhibit an input which is coupled to a direct-current source and has an output which can be coupled to a discharge lamp; the commutating device being configured in such a manner that it couples the direct-current source to the output and the polarity with which the direct-current source is coupled to the output can be commutated by a control device; the control device including a measurement input which is coupled to a measuring device which is configured to deliver a measurement value which is a measure of the magnitude of a lamp voltage; wherein the control device is configured to control the commutating device in such a manner that the polarity at which a higher lamp voltage prevails is coupled longer to the output.

Abstract: An electronic product having a double-PCB sandwich structure includes a PCB assembly, and a casing having an open side. The electronic product is configured such that a protuberance is respectively formed on the inner sides of two side walls of the casing in the longitudinal direction, the PCB assembly comprises an electronic component, a base PCB and a main PCB, the length of the base PCB and the length of the main PCB in the longitudinal direction of the casing are substantially equal to each other and slightly smaller than the length of the casing so that the PCB assembly can be installed into the casing by mating with the protuberances.

Abstract: A method for the closed-loop control of the operation of a light source which is supplied with power by a DC/DC voltage converter, a manipulated variable being regulated by a setpoint value for an operational parameter of the DC/DC voltage converter being input, wherein the method comprises the steps of: increasing the switching frequency of the DC/DC voltage converter by an increase value prior to rapid changes in the setpoint value; waiting for a retention time; setting the new setpoint value; waiting for the end of a total retention time; and lowering the switching frequency of the DC/DC voltage converter by the increase value.

Abstract: A circuit arrangement for the closed-loop control of the current through at least one discharge lamp may include a control loop including: a setpoint value input for supplying a setpoint value; an actual value input for supplying an actual value; and an output for providing a signal, which has been correlated with the current through the at least one discharge lamp, the actual value having been correlated with the value of the current through the discharge lamp; and a setpoint value input apparatus, which is designed to provide the setpoint value to the control loop; wherein the setpoint value input apparatus includes: a microprocessor with at least one input, the microprocessor being designed to couple the at least one input to a potential from a group of at least two different potentials; and a wiring apparatus with at least one input, which is coupled to the at least one input of the microprocessor, and at least one output, which is coupled to at least one point of the control loop.

Abstract: A circuit arrangement for starting a discharge lamp, comprising: a first and a second input terminal for connecting an input voltage; an inverter, which has an input and an output, the input being coupled to the first and the second input terminal; a first and a second output terminal for connecting the discharge lamp; a resonant inductor, which is coupled between the output of the inverter and the first output terminal; a resonant circuit, which comprises the resonant inductor; a regulating apparatus for regulating the frequency of the signal provided at the inverter output; and a current measuring apparatus, which is arranged so as to measure a current which is correlated with the current in the resonant circuit, wherein the regulating apparatus is adapted to regulate the frequency at the output of the inverter as a function of the measured current.

Abstract: A method for operating a gas discharge lamp featuring a gas discharge lamp burner and a first and a second electrode, wherein the electrodes have a nominal electrode separation in the gas discharge lamp burner before their first activation and said nominal separation is correlated to the lamp voltage. The method may include checking whether the off-time, corresponding to the time duration between two DC voltage phases, has expired; and if the off-time has expired, omitting commutations or applying pseudo-commutations for a predefined time duration which depends on the lamp voltage in such a way that a time duration of the omission of at least one of commutations and application of pseudo-commutations is predefined for each lamp voltage.

Abstract: A method for operating a gas discharge lamp may include; the gas discharge lamp is operated using an intermittently constant lamp current, whose time-relative average value of the frequency is predetermined by the lamp voltage of the gas discharge lamp in the steady state, wherein the lamp current has predefined commutation points in the temporal course, and a commutation for generating a commutation pattern can take place at these commutation points, wherein the time-relative average value of the frequency of the lamp current is adjusted by means of a variation of the commutation pattern.

Abstract: A circuit arrangement for operating a discharge lamp, wherein the circuit arrangement comprises a commutation device, which has an input which is coupled to a DC source, and has an output which can be coupled to a discharge lamp. The commutation device is designed in such a way that it couples the DC source to the output, and the polarity at which the DC source is coupled to the output can be commutated by a control device. The control device has a sync input, and the polarity of the DC source is commutated in synchronism with sync pulses of a sync signal which can be applied at the sync input. The control device has a measuring input, which is coupled to a measuring device which is designed to provide a measured value which is a measure of the size of electrode peaks. The control device suppresses at least one commutation if the measured value overshoots or undershoots a predetermined threshold value.

Abstract: In a video projection system, an operating device (12) activates a lamp (10), so that it delivers light with intensity which changes over time. A light modulation unit (16) is provided to apply image information to the light and is activated by a control unit (18) for this purpose. The operating device (12) and control unit (18) must be synchronized. While in the prior art the control unit transmits synchronization signals to the operating device (12), a reversal is provided according to the invention, i.e., the operating device (12) is designed to transmit synchronization signals to the control unit (18).