Patent application number | Description | Published |
20090167207 | Dimmable Operating Device having Internal Dimming Characteristic - 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. | 07-02-2009 |
20100148683 | CIRCUIT FOR OPERATING LIGHT EMITTING DIODES (LEDS) - The present invention relates to a circuit arrangement for supplying power to, and for controlling, light-emitting diodes for illuminating, and to a method therefor. The invention provides a driver circuit for providing an operating current for operating at least one light-emitting diode, wherein the operating current has different positive intensities. | 06-17-2010 |
20110199023 | OPERATING CIRCUIT FOR LEDS - An operating circuit is provided for an LED, which receives a voltage, and which supplies a voltage for the LED via a coil, having a first switch clocked by a control/regulating unit. Power is stored temporarily in the coil when the first switch is activated so that the power is discharged via a diode and via the LED when the first switch is turned off. A capacitor is arranged in parallel to the LED and maintains current through the LED during the demagnetization of the coil. A first switch generates a first sensor signal dependent on the current flowing through the first switch, and/or a second sensor unit, which detects whether demagnetization of the coil unit has occurred and generates a sensor signal. The signals are fed to the control/regulating unit and processed. The control/regulating unit reactivates the first switch when the coil is demagnetized and/or the diode is blocking. | 08-18-2011 |
20110241569 | Adaptive Pfc For A Lighting Means Load Circuit, In Particular For A Load Circuit With An Led - The invention relates to a method for operation of an actively clocked PFC circuit with a directly or indirectly connected load circuit at the output of the PFC circuit, wherein the load circuit has a lighting means, in particular one or more LEDs, wherein the PFC circuit is supplied at least with a measurement signal which reflects the power consumption of the load circuit or with an external control signal which indicates the power consumption, and a control circuit adjusts the mode of operation of the PFC circuit continuously or preferably in two or more steps, depending on the control signal or measurement signal. | 10-06-2011 |
20110254457 | CIRCUIT FOR THE OPERATION OF AT LEAST ONE LED - A circuit for operating at least one LED (“driver circuit”) includes input terminals to be connected to an input or operating voltage in the form of a direct current (DC) voltage or a rectified alternating current (AC) voltage, and output terminals to be connected to a load circuit containing the at least one LED. The circuit includes a clocked switch and an open-loop control circuit for clocking the switch. The open-loop control circuit is in the form of an integrated circuit (IC) and is provided with input and output pins. The open-loop control circuit generates a clock signal for the switch depending on at least two actual value signals, such that there is a control loop with the manipulated variable “clocking of the switch.” | 10-20-2011 |
20120104958 | OPERATING CIRCUIT FOR LIGHT-EMITTING DIODES - A method is provided for operating at least one LED by a switched-mode regulator circuit to which a DC or a rectified AC voltage is supplied and which provides a supply voltage for at least one LED by a coil and a switch clocked by a control/regulation unit. When the switch is activated, power is temporarily stored in the coil and is discharged through a diode and through at least one LED when the switch is deactivated and the current flows through the LED through a first power storage element which is coupled to a second power storage element. The first power storage element just reaches its maximum capability of storing power due to the current flowing through the LED. A rising current is supplied to the second power storage element such that the time can be detected when the first power storage element recovers its capability of storing power. | 05-03-2012 |
20120133295 | POWER REGULATION OF LED BY MEANS OF AN AVERAGE VALUE OF THE LED CURRENT AND BIDIRECTIONAL COUNTER - A circuit for the power regulation of an LED comprises a converter having a switch. The LED is interconnected in an output circuit, wherein a control unit controls the magnetization of an inductor, in that it actively clocks the switch. A measured actual value representative of the average value of the LED current is returned to the control unit and compared to a reference value. | 05-31-2012 |
20120139544 | System And Method For Recording The Characteristic Curves Of Light-Emitting Diodes (LEDs) - The invention relates to a system for recording characteristic curves for a light-emitting diode arrangement ( | 06-07-2012 |
20120280638 | Controllable Retrofit LED Lamps and Lighting System Having an LED Lamp - The invention relates to a retrofit LED lamp ( | 11-08-2012 |
20130134893 | Led Controller Comprising a Clocked Current Source - The invention relates to an LED driver circuit comprising: a circuit block for providing an adjustable DC voltage and a clocked constant current source, e.g. a DC/DC converter that is supplied with the DC voltage, comprising a switch that is clocked by a control circuit in such a way that a reduction of the activation period ton of the switch leads to a reduction in the provision of power. One or more LEDs can be supplied from the constant current source and in addition to reducing the activation period t0N, the control unit is designed to change at least one other control variable of the constant current source or the circuit block in order to provide the direct current. | 05-30-2013 |
20130147269 | Modular LED Lighting System Having Emergency Light Function - The invention relates to a modular LED lighting unit, comprising a first module ( | 06-13-2013 |
20130193849 | Modular LED-Lighting System - The invention relates to a modular LED-light comprising a first module ( | 08-01-2013 |
20130193878 | LED-Lighting System Comprising an Operational Data Memory - The invention relates to an LED operating circuit in which a second module ( | 08-01-2013 |
20130200707 | Modular LED Lighting Having an Emergency Light Function - The invention relates to a modular LED lighting unit, comprising a first module ( | 08-08-2013 |
20130300306 | CIRCUIT FOR THE OPERATION OF AT LEAST ONE LED - A circuit for operating at least one LED (“driver circuit”) includes input terminals to be connected to an input or operating voltage in the form of a direct current (DC) voltage or a rectified alternating current (AC) voltage, and output terminals to be connected to a load circuit containing the at least one LED. The circuit includes a clocked switch and a control circuit for clocking the switch. The control circuit is in the form of an integrated circuit (IC) and is provided with input and output pins. The control circuit generates a clock signal for the switch depending on at least two actual value signals, such that there is a control loop with the manipulated variable “clocking of the switch.” | 11-14-2013 |