Abstract: A motor vehicle headlight element is specified which has at least one light-emitting diode and at least one control apparatus. The control apparatus is suitable for processing a signal which is dependent on a measurement variable and for applying a current, corresponding to the signal, to the light-emitting diode. The control apparatus and the light-emitting diode are arranged on a common mount.

Abstract: A semiconductor light module comprising: integrated drive electronics, a semiconductor light source applied to a disk-shaped module, the surface of which is electrically conductive, and wherein the module has good thermal conductivity. The drive electronics are positioned around the semiconductor light source, and the drive electronics comprise a circuit board having at least first and second conductor track levels. The first track level is oriented outward in the light emission direction in the installed state, and the second track level is enclosed by a closed cavity incorporated into the module. Ground-carrying lines of the circuit board are electrically connected to the surface of the module.

Abstract: A motor vehicle headlight element is specified which has at least one light-emitting diode and at least one control apparatus. The control apparatus is suitable for processing a signal which is dependent on a measurement variable and for applying a current, corresponding to the signal, to the light-emitting diode. The control apparatus and the light-emitting diode are arranged on a common mount.

Abstract: A motor vehicle headlight element is specified which has at least one light-emitting diode and at least one control apparatus. The control apparatus is suitable for processing a signal which is dependent on a measurement variable and for applying a current corresponding to the signal, to the light-emitting diode. The control apparatus and the light-emitting diode are arranged on a common mount.

Abstract: The invention relates to a circuit unit for a semiconductor unit which produces radiation, with a forward voltage Uf being applied during operation to the semiconductor unit which produces radiation, and with a forward current If flowing through the semiconductor unit which produces radiation, with the circuit unit regulating the forward current If such that an actual value Vact which depends on the forward current If and the forward voltage Uf assumes a predetermined nominal value Vnom. The invention also relates to a radiation source.

Abstract: A semiconductor light module comprising: integrated drive electronics, a semiconductor light source applied to a disk-shaped module, the surface of which is electrically conductive, and wherein the module has good thermal conductivity. The drive electronics are positioned around the semiconductor light source, and the drive electronics comprise a circuit board having at least first and second conductor track levels. The first track level is oriented outward in the light emission direction in the installed state, and the second track level is enclosed by a closed cavity incorporated into the module. Ground-carrying lines of the circuit board are electrically connected to the surface of the module.

Abstract: The invention relates to a circuit arrangement for operating high pressure discharge lamps and corresponding operating method, whereby the input voltage for the pulsed trigger device is increased by means of a series resonance loop (L3, C4), of a cascade circuit, or a symmetrical voltage doubling circuit.

Abstract: A motor vehicle headlight element is specified which has at least one light-emitting diode and at least one control apparatus. The control apparatus is suitable for processing a signal which is dependent on a measurement variable and for applying a current, corresponding to the signal, to the light-emitting diode. The control apparatus and the light-emitting diode are arranged on a common mount.

Abstract: The invention relates to a lamp base (2) for a high-pressure discharge lamp with a printed circuit board (30) mounted inside and populated with electrical components and printed conductors (31) for electrically contacting the components. At least one electrical contact (33) is mounted on the printed circuit board (30) for current supply (16) to the lamp, and at least one partition (24, 25) is provided for electrical insulation between the at least one electrical contact (33) or current supply (16) and the printed conductors (31) on the printed circuit board (30).

Abstract: The invention relates to a circuit unit for a semiconductor unit which produces radiation, with a forward voltage Uf being applied during operation to the semiconductor unit which produces radiation, and with a forward current If flowing through the semiconductor unit which produces radiation, with the circuit unit regulating the forward current If such that an actual value Vact which depends on the forward current If and the forward voltage Uf assumes a predetermined nominal value Vnom. The invention also relates to a radiation source.

Abstract: The invention relates to a high-pressure discharge lamp, in particular a vehicle headlight high-pressure discharge lamp, having a lamp base, in whose interior is arranged a starting apparatus for the purpose of starting the gas discharge in the high-pressure discharge lamp and which is provided with an electromagnetic shield, and having a discharge vessel which has an end near to the base and an end remote from the base, a power supply line protruding out of the end, remote from the base, of the discharge vessel being passed back to the lamp base and being electrically coupled to the electromagnetic shield. The electromagnetic shield is preferably connected to the ground reference potential of an operating device of the high-pressure discharge lamp.

Abstract: The invention relates to a lamp base (2) for a high-pressure discharge lamp with a printed circuit board (30) mounted inside and populated with electrical components and printed conductors (31) for electrically contacting the components. At least one electrical contact (33) is mounted on the printed circuit board (30) for current supply (16) to the lamp, and at least one partition (24, 25) is provided for electrical insulation between the at least one electrical contact (33) or current supply (16) and the printed conductors (31) on the printed circuit board (30).

Abstract: A starting apparatus for a high-pressure discharge lamp provided with an auxiliary starting electrode, has a series resonant circuit for the purpose of generating the starting voltage for the high-pressure discharge lamp. The resonant inductance of the series resonant circuit includes the primary winding of a transformer, whose secondary winding is provided for the purpose of applying the starting voltage to the auxiliary starting electrode (Z) of the high-pressure discharge lamp. The invention also relates to a high-pressure discharge lamp, in particular to a vehicle headlight lamp, having such a starting apparatus arranged in the lamp base.

Abstract: An illumination system has at least two light sources of which at least one light source includes an LED, and a driver device designed to operate at least the one LED with a DC signal; a sensor device for determining at least one feature of the light output; an actual value storage device connected to the sensor device for storing an actual value of the feature; a setpoint selection device for storing a setpoint of the feature; and a control device connected on the input side to the actual value storage device for of transmitting the actual value, and to the setpoint selection device for transmitting the setpoint, and which provides the driver device with a control signal that changes a characteristic of the DC signal used for driving the LED such that the actual value approaches the setpoint.

Abstract: The invention relates to a circuit arrangement for operating high pressure discharge lamps and corresponding operating method, whereby the input voltage for the pulsed trigger device is increased by means of a series resonance loop (L3, C4), of a cascade circuit, or a symmetrical voltage doubling circuit.

Abstract: The invention relates to a high-pressure discharge lamp having electrodes arranged inside a discharge vessel which define a discharge path of a gas discharge in the discharge vessel, and having a starting device, arranged inside the lamp base for the high-pressure discharge lamp and designed as a pulse starting device, for starting the gas discharge in the discharge vessel, and having, arranged outside its discharge vessel, an auxiliary starting electrode coupled to the pulse starting device, the voltage input of pulse starting device being connected in parallel with the discharge path of the high-pressure discharge lamp, such that according to the invention the voltage across the discharge path serves as supply voltage for the pulse starting device. Also disclosed is an operating method for such a high-pressure discharge lamp.

Abstract: The invention relates to an operating method for a high-pressure discharge lamp which comprises a transparent discharge vessel (1), enclosing a substantially cylindrical discharge chamber (10), in which electrodes (2, 3) and an ionizable charge, for generating a light-emitting gas discharge, are arranged, whereby the aspect ratio is higher than 0.86. According to said invention, the high-pressure discharge lamp is operated by means of a substantially sinusoidal current at a preset frequency, lying in a frequency range above 30 kilohertz and free from acoustic resonances.

Abstract: The invention relates to a high-pressure discharge lamp, in particular a vehicle headlight high-pressure discharge lamp, having a lamp base, in whose interior is arranged a starting apparatus for the purpose of starting the gas discharge in the high-pressure discharge lamp and which is provided with an electromagnetic shield, and having a discharge vessel which has an end near to the base and an end remote from the base, a power supply line protruding out of the end, remote from the base, of the discharge vessel being passed back to the lamp base and being electrically coupled to the electromagnetic shield. The electromagnetic shield is preferably connected to the ground reference potential of an operating device of the high-pressure discharge lamp.

Abstract: The invention relates to a high-pressure discharge lamp having electrodes arranged inside a discharge vessel which define a discharge path of a gas discharge in the discharge vessel, and having a starting device, arranged inside the lamp base for the high-pressure discharge lamp and designed as a pulse starting device, for starting the gas discharge in the discharge vessel, and having, arranged outside its discharge vessel, an auxiliary starting electrode coupled to the pulse starting device, the voltage input of pulse starting device being connected in parallel with the discharge path of the high-pressure discharge lamp, such that according to the invention the voltage across the discharge path serves as supply voltage for the pulse starting device. Also disclosed is an operating method for such a high-pressure discharge lamp.

Abstract: The invention relates to a high-pressure discharge lamp having a light-transmitting discharge vessel, which includes at least one sealed end and a starting aid, the starting aid being arranged on the at least one sealed end and being designed to be opaque.