摘要:
The invention relates to the operation of illuminants, in particular OLEDs. The invention relates to a method and a measuring instrument for determining the electrical properties of an OLED, the equivalent circuit diagram of which is composed of the parallel connection of an equivalent diode DE and an equivalent capacitance CE as well as an equivalent resistance RE that is connected in series to said parallel connection. The values for the equivalent resistance RE and the equivalent capacitance CE are determined at a different time than are the values for the equivalent diode DE.
摘要:
An emergency lighting device (1) for operating a light source, in particular an LED, incorporates an energy storage unit (4), a charging circuit (3) to be supplied with mains supply voltage (Uin) for charging the energy storage unit (4) during a charging operation, wherein the charging circuit (3) has potential isolation, and a driver circuit (5) supplied by the energy storage unit (4) during operation of the emergency light, for operating the light source. A control unit (2) is further provided that is designed to monitor the state of the mains supply voltage (Uin) during the charging operation, and to activate emergency operation upon detecting an emergency state, wherein the control unit (2) determines the state of the mains supply voltage (Uin) from operating parameters of the emergency lighting device (1) measured on the output side of the charging circuit (3).
摘要:
In the case of an electronic ballast (1) for operating a lamp (10) or an operating device for illumination means, having mains terminals (5) for connecting the ballast (1) or operating device to a current supply, output terminals (6) for connecting a lamp or light source to the ballast (1) or operating device and a control unit (4) for controlling and/or regulating an operating voltage delivered to the lamp (LA) or light source via the output terminals (6), external control information (Vprog) for programming or configuring the operating behavior of the operating device is delivered to the control unit (4) via a programming input, and stored in a memory (4a) associated with the control unit (4). In accordance with the invention, the programming input is formed by means of the mains terminals (5) and/or the output terminals (6) of the ballast (1) or of the operating device (2), which are connected internally with the control unit (4).
摘要:
A circuit for the generation of ignition pulses for a lamp has: an ignition pulse transformer, a device for the generation of ignition pulses (ignition pulse generator) at a primary winding of the ignition pulse transformer, which are transformed in the secondary winding of the ignition pulse transformer, a voltage detector for the detection of the voltage value of the transformed ignition pulses, and a voltage regulator for regulating the voltage value of the transformed ignition pulses to a predetermined reference value. The ignition pulse generator has, in a series circuit, a pulse capacitor and a switch, parallel to the secondary winding of the ignition pulse transformer and the lamp, wherein the regulator for the voltage value of the transformed ignition pulses sets at the pulse capacitor the voltage applied at an ignition time point. The voltage at the pulse capacitor can be set by means of selection of the switch-on and/or switch-off time points of the switch.
摘要:
In the case of an electronic ballast (1) for operating a lamp (10) or an operating device for illumination means, having mains terminals (5) for connecting the ballast (1) or operating device to a current supply, output terminals (6) for connecting a lamp or light source to the ballast (1) or operating device and a control unit (4) for controlling and/or regulating an operating voltage delivered to the lamp (LA) or light source via the output terminals (6), external control information (Vprog) for programming or configuring the operating behavior of the operating device is delivered to the control unit (4) via a programming input, and stored in a memory (4a) associated with the control unit (4). In accordance with the invention, the programming input is formed by means of the mains terminals (5) and/or the output terminals (6) of the ballast (1) or of the operating device (2), which are connected internally with the control unit (4).
摘要:
An LED driver for operating a light source, in particular an LED, includes an energy storage unit, a driver circuit supplied by the energy storage unit during emergency lighting operation, for operating the light source, and a control unit that activates the driver circuit in such a way that the light source is operated with a constant power or constant current irrespective of the state of charge of the energy storage unit, where the control unit, for the purpose of regulating the power, determines indirectly the level of the current supplied to the light source.
摘要:
The invention relates to an operating device (BG) for lamps (LM), comprising an interface (IFi), by means of which the device (BG) may be provided with external dimming values. The device (BG) converts said provided external dimming values into internal dimming values on the basis of which the control of the connected lamps (LM) is achieved, the internal dimming values being of higher resolution than the external dimming values. According to the invention, the operating device (BG) is designed such that the conversion of the external dimming values into internal dimming values may be programmed. The operating device (BG) can particularly also be designed such that said conversion can be programmed with regard to the dynamics thereof. A programming can be provided by a time conversion relationship (linear, logarithmic or exponential time curve etc.) by means of which an internal dimming value corresponding to an external dimming value is reached.
摘要:
An interface (12) for a lamp operating device (13) has two input-side terminals (1, 2) for the connection of bus lines or for connection with a button or switch, an evaluation logic (3) for the processing of signals present at the input-side terminals (1, 2) and for the generation of output-side signals for the control of the lamp operating device (3), and at least one electrical isolation element (4) to electrically decouple the input-side terminals (1, 2) from the lamp operating device (13). Thereby, the evaluation logic (3) is arranged on that side of the electrical isolation element (4) which is towards the input-side terminals (1, 2), and is supplied with voltage via the input-side terminals (1, 2) of the interface (12).
摘要:
An electronic ballast for controlling the operating behavior and brightness of a gas discharge lamp, includes a full bridge circuit fed with a d.c. voltage (UBUS). The gas discharge lamp is connected as a load of the full bridge circuit, and a control circuit in each case switches on one bridge diagonal and switches off another bridge diagonal of the full bridge circuit, alternatingly. The bridge diagonals each have a regulatable constant current source for regulating a lamp current, and thereby the occurrence of flickering appearances is suppressed. As a result, the lamp can be dimmed over a very wide range of brightnesses.
摘要:
The invention relates to a control circuit for at least one light-emitting diode (1) for adjusting the current and/or the voltage of the light-emitting diode (1) to a desired value adjusted by means of a controller (3), the current, the voltage and/or the luminescence of the light-emitting diode (1) being detectable and comparable with the desired value.