Abstract: A lighting system comprising a first light source, which is adapted to generate light of a first color, and at least one second light source, which is adapted to generate light of a second color, wherein the light sources are driven so as to generate a predeterminable color sequence, wherein the light sources are operated by a common control unit and driven by said control unit in the sequence required for generating the predeterminable color sequence. The light sources are connected in parallel and are electrically coupled to an energy supply unit via a first circuit node. The lighting system comprises a regulator unit and coupled to the control unit via a signal line, and wherein the control unit is adapted to predetermine a desired energy output of the energy supply unit via the regulator unit, to be precise depending on the individual color within the color sequence.

Abstract: A circuit configuration may include an operational amplifier having a plus and a minus input and an output; and a current sensing resistor, whereby the voltage drop across the resistor is coupled to the minus input; a first transistor having a control electrode, a reference electrode and a working electrode, the working-reference electrode path of which is coupled in series to a first and second connection for a first LED between a connection for a supply voltage and the reference potential; a second transistor having a control electrode, a reference electrode and a working electrode, the working-reference electrode path of which is coupled in series to a first and second connection for a second LED between a connection for a supply voltage and the reference potential; a first switch and a second switch coupled in series between the output and the control electrode of the first and second transistor, respectively.

Abstract: A circuit arrangement for operating an LED arrangement, wherein a controller transmits a current intensity value for a respective LED to a driver and the latter feeds the LED with current in a time sequence containing a check pulse, and wherein a measuring device is configured to measure the light emitted by the light-emitting diode on account of the check pulse, wherein the controller is configured to use only measurement values which represent the light of check pulses for the stipulation of current intensity values, and wherein the driver defines a main factor, which is dependent on at least one of the temperature of the LED and on the voltage dropped across said LED, wherein the driver is configured to multiply the current intensity value by the main factor and this product defines the current intensities of all the current pulses in the time sequence apart from the check pulse.

Abstract: A control method for a semiconductor light source may include operating the semiconductor light source with short, powerful pulses by an operating device; storing the characteristic light decrease of the semiconductor light source depending on the power introduced into the semiconductor light source in the operating device; and altering power introduced during the pulse in such a way that the emitted quantity of light of the semiconductor light source substantially remains constant over the pulse duration.

Abstract: A circuit arrangement for operating an LED may include a switching controller with an output for coupling to the LED; a short-circuiting switch with a control electrode, it being possible for the short-circuiting switch to be connected in parallel with an LED; and a control device with a radiation signal input for supplying a radiation signal and a first output, which is coupled to the control electrode of the short-circuiting switch; wherein the switching controller includes a start/stop input for starting the switch controller, it being possible for the control device to furthermore include a second output which is coupled to the start/stop input of the switching controller, it being possible for the control device to be designed to supply a start/stop signal at its second output for starting and stopping the switching controller depending on the radiation signal.

Abstract: An LED module (10) comprising a thermally conductive circuit board (12); at least one LED chip (14a to 14f) mounted on the thermally conductive circuit board (12); at least one temperature sensor (24) mounted on the thermally conductive circuit board (12), for determining the temperature of the at least one LED chip (14a to 14f); an optical arrangement (16), which is arranged above the at least one LED chip (14a to 14f) and is mounted on the thermally conductive circuit board (12), wherein the optical arrangement (16) has at least one light-guiding section (20); and a light sensor (18) arranged on the thermally conductive circuit board (12), said light sensor being arranged with respect to the at least one light-guiding section (20) in such a way that it can sense light guided in the light-guiding section (20).

Abstract: An illumination device may include a flexible printed circuit board; a power electronics module; and a light-emitting diode module, which is electrically connected to the power electronics module by means of the flexible printed circuit board.

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 circuit arrangement for operating an LED arrangement, wherein a controller transmits a current intensity value for a respective LED to a driver and the latter feeds the LED with current in a time sequence containing a check pulse, and wherein a measuring device is configured to measure the light emitted by the light-emitting diode on account of the check pulse, wherein the controller is configured to use only measurement values which represent the light of check pulses for the stipulation of current intensity values, and wherein the driver defines a main factor, which is dependent on at least one of the temperature of the LED and on the voltage dropped across said LED, wherein the driver is configured to multiply the current intensity value by the main factor and this product defines the current intensities of all the current pulses in the time sequence apart from the check pulse.

Abstract: A circuit arrangement for operating at least one LED may include an operational amplifier; wherein a first connection of the LED is coupled to a connection for a DC supply voltage; a transistor which is coupled in series with the first connection and a second connection for the LED and can be operated in an analog manner, wherein the transistor has a control electrode, a reference electrode and a working electrode, wherein the control electrode is coupled to the output of the amplifier, wherein the working electrode is coupled to the connection for a supply voltage; and a current measuring resistor which is coupled in series between the reference electrode and a reference potential, wherein the voltage dropped across the current measuring resistor is coupled to the inverting input of the amplifier; wherein at least one load is coupled in parallel with the first and second connections for the LED.

Abstract: A circuit configuration may include an operational amplifier having a plus and a minus input and an output; and a current sensing resistor, whereby the voltage drop across the resistor is coupled to the minus input; a first transistor having a control electrode, a reference electrode and a working electrode, the working-reference electrode path of which is coupled in series to a first and second connection for a first LED between a connection for a supply voltage and the reference potential; a second transistor having a control electrode, a reference electrode and a working electrode, the working-reference electrode path of which is coupled in series to a first and second connection for a second LED between a connection for a supply voltage and the reference potential; a first switch and a second switch coupled in series between the output and the control electrode of the first and second transistor, respectively.

Abstract: A driver for a plurality of semiconductor light sources is provided. The driver may include a plurality of means configured to provide current for in each case at least one semiconductor light source, wherein the driver includes a unit, composed of a power factor corrector and at least one DC/DC converter or is coupled to such a unit, an output of the DC-DC converter being directly connected to the means configured to provide current.

Abstract: A plug device may include a printed circuit board; and a plug connector, which is soldered flat onto the printed circuit board.

Abstract: A control method for a semiconductor light source may include operating the semiconductor light source with short, powerful pulses by an operating device; storing the characteristic light decrease of the semiconductor light source depending on the power introduced into the semiconductor light source in the operating device; and altering power introduced during the pulse in such a way that the emitted quantity of light of the semiconductor light source substantially remains constant over the pulse duration.

Abstract: A circuit arrangement for driving semiconductor light sources is provided. The circuit arrangement may include video electronics, which are configured to generate a timing signal and an image value table; a driver circuit, which comprises a digital and an analogue part, and a semiconductor light source module, which can contain one or a plurality of semiconductor light sources; and a switch being arranged between the driver circuit and the semiconductor light source module, which switch is driven by the driver circuit and can switch the desired value for the power supply for the semiconductor light source module away from an analogue/digital converter to logic 0.

Abstract: An illumination device may include a flexible printed circuit board; a power electronics module; and a light-emitting diode module, which is electrically connected to the power electronics module by means of the flexible printed circuit board.

Abstract: A drive circuit for driving semiconductor light sources having one or more semiconductor light sources applied to a circuit mount, wherein the drive circuit for driving semiconductor light sources is also applied to the circuit mount and can generate pulses with a rise time of less than 3 ?s.

Abstract: An LED module (10) comprising a thermally conductive circuit board (12); at least one LED chip (14a to 14f) mounted on the thermally conductive circuit board (12); at least one temperature sensor (24) mounted on the thermally conductive circuit board (12), for determining the temperature of the at least one LED chip (14a to 14f); an optical arrangement (16), which is arranged above the at least one LED chip (14a to 14f) and is mounted on the thermally conductive circuit board (12), wherein the optical arrangement (16) has at least one light-guiding section (20); and a light sensor (18) arranged on the thermally conductive circuit board (12), said light sensor being arranged with respect to the at least one light-guiding section (20) in such a way that it can sense light guided in the light-guiding section (20).

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 lighting system comprising a first light source, which is adapted to generate light signals of a first color, and at least one second light source, which is adapted to generate light signals of a second color, wherein the light sources are adapted to be driven so as to generate a predeterminable color sequence of individual colors, wherein the light sources are adapted to be operated by a common control unit and to be driven by said control unit in the sequence required for generating the predeterminable color sequence. The light sources are connected in parallel and are electrically coupled to an energy supply unit via a first circuit node in order to supply energy. The lighting system comprises a regulator unit for regulating the energy supply unit and coupled to the control unit via a signal line, and wherein the control unit is adapted to predetermine a desired energy output of the energy supply unit via the regulator unit, to be precise depending on the individual color within the color sequence.