摘要:
A circuit arrangement for operating a low-pressure discharge lamp may include a voltage source with two terminals; switches; and a series resonant circuit; a controller configured to control the switches such that an AC voltage is applied to the resonant circuit; a PTC thermistor coupled on one side to a circuit point of the resonant circuit and on the other side, at least one of via a diode, to the first terminal of the voltage source and, via a diode to the second terminal of the voltage source; a resistive element connected in series with a diode in the circuit between a terminal of the voltage source and the PTC thermistor; and an evaluation device configured to tap off the voltage drop across the resistive element and being coupled to the controller in order to deactivate the controller.
摘要:
A high-pressure discharge lamp may include an elongate ceramic discharge vessel with a central part and two ends and an axis, the ends being closed by seals, electrodes which extend into the discharge volume enclosed by the discharge vessel being anchored in the seals, and a fill which contains metal halides being accommodated in the discharge vessel, wherein a ring structure, which is separated from the seal and extends around the seal, is placed on at least one end.
摘要:
A method for producing an illumination device is provided. The method may include providing a carrier, on which illumination means are applied, with filler material; applying an upper exterior layer on the filler material; reducing the arrangement formed by the carrier, filler material and upper exterior layer to a predetermined thickness; wherein the carrier is a flex-board, which is equipped with the illumination means.
摘要:
A lamp with an AC lamp burner may include two electrodes spaced apart from one another, a device configured to apply a voltage with alternating polarity to the electrodes; and a reflector, which has a first partial section, which is in the form of a partial body of a first ellipsoid, which has a first and a second focus, or is in the form of a partial body of a first paraboloid, which has a first focus, the reflector having a second partial section, which is in the form of a partial body of a second ellipsoid, which likewise has a first and a second focus or is in the form of a partial body of a second paraboloid, which has a first focus, the first foci of the two ellipsoids or paraboloids being located at different points.
摘要:
Various embodiments provide a method for ascertaining a type of a gas discharge lamp using an electronic ballast for operating different types of gas discharge lamps, wherein the different types of gas discharge lamps differ in at least one operating parameter, wherein the method may include: a) preheating at least one filament in the gas discharge lamp for a predetermined preheating time; b) measuring a physical variable which is characteristic for the type of the gas discharge lamp at the end of the preheating time and providing the measurement value of said variable; and c) ascertaining the lamp type on the basis of the measurement value which is provided, wherein the preheating time is increased by a predetermined time period and the b) and c) are repeated if the lamp type in c) cannot be ascertained uniquely. Moreover, various embodiments provide an electronic ballast for operating at least two different types of gas discharge lamps which have at least one different operating parameter.
摘要:
A circuit arrangement for operating discharge lamps is provided with an input, to which an AC system voltage from a power supply system can be connected, an output, to which at least one discharge lamp can be connected, a backup capacitance, which is arranged between the input and the output, and a switch, which is in a charging current path of the backup capacitance. The circuit arrangement may include a driver configured to clock the switch for a predetermined period of time when the circuit arrangement is switched on for periodically interrupting the charging current path of the backup capacitance.
摘要:
A luminophore consisting of the BAM system as a host lattice, having the stoichiometry MxEu1−xMg1−y+dMnyAl10+2fO17+d+3f, is provided, wherein 0.2≦x≦0.48; 0≦y≦0.3; 0≦d≦0.1; −0.1≦f≦1.0.
摘要:
A power converter is provided, which may include_a transformer having primary and secondary windings; a primary side switching bridge arrangement including at least two switches switcheable at a switching frequency to drive the primary winding of said transformer, said primary side switching bridge arrangement including at least one decoupling capacitor; and a secondary side rectifying and filtering stage coupled to the secondary winding of said transformer, wherein said secondary side rectifying and filtering stage includes a current doubler with at least one inductor, wherein said at least one decoupling capacitor and said at least one inductor in said current doubler comprise a resonant tank circuit having a resonant frequency range encompassing said switching frequency, whereby said converter exhibits a gain defined by the position of said switching frequency within said resonant frequency range.
摘要:
An electronic ballast includes a step-up converter, which includes a storage inductor, a diode, an intermediate circuit condenser and a switch element. According to the invention, a current passing through the storage inductor is used in the form of an indicator of turnon and turnoff times of the step-up converter oscillates in a self-exciting manner.
摘要:
A current generator arrangement for use, e.g., in 1-10V interfaces for lighting systems, includes at least one transistor (Q3) having a base-emitter junction wherein the voltage drop across the base-emitter junction defines the intensity of the output current and wherein the base-emitter junction is exposed to temperature drift. A resistive network (Req2) is coupled to the transistor (Q3), whereby the intensity of the output current is a function of both the voltage drop across the base-emitter junction of the transistor (Q3) and the resistance value of the resistive network (Req2). The resistive network (Req2) includes at least one resistor element (NTC3; NTC4) whose resistance value varies with temperature to keep constant the intensity of the output current irrespective of any temperature drift in the voltage drop across the base-emitter junction of the transistor (Q3).