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Circuit arrangement and method for operating at least one led

A technology for circuit layout and control devices, which is applied in the direction of lighting devices, the use of semiconductor lamps, electrical components, etc., and can solve problems such as high loss

Inactive Publication Date: 2012-12-05
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This variant also leads to undesirably high loss

Method used

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  • Circuit arrangement and method for operating at least one led
  • Circuit arrangement and method for operating at least one led
  • Circuit arrangement and method for operating at least one led

Examples

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Embodiment Construction

[0028] figure 1 A first exemplary embodiment of the wiring arrangement according to the invention is shown schematically. The circuit arrangement includes a control device 10 to which a video signal VS is fed at its input. The control means 10 comprise storage means 12 which buffer the detailed video information of the real-time images during the processing of the video information of the subsequent images, in particular the preparation of the indicated video information on the display means. On the output side, the control device 10 is connected to a switching regulator 14 , which is designed in the present example as a step-down converter. The switching regulator 14 comprises a switching regulator control device 16 which triggers in relation to the supply voltage U in Connected, electronic switch S of switching regulator 14 . The switching regulator 14 also includes a diode D as well as an inductor L and a capacitor C. The voltage dropped by the capacitor C is used by U ...

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Abstract

The present invention relates to a circuit arrangement for operating at least one LED comprising at least one switching controller (14) with an output for coupling to the at least one LED,at least one short-circuiting switch (KS) with a control electrode, wherein the short-circuiting switch (KS) is connected in parallel with the at least one LED,and a control apparatus (10) with at least one radiation signal input for supplying a radiation signal (VS) and a first output, which is coupled to the control electrode of the short-circuiting switch (KS),wherein the at least one switching controller (14) furthermore comprises a start / stop input for starting and stopping the switching controller (14), wherein the control apparatus (10) furthermore comprises a second output, which is coupled to the start / stop input of the at least one switching controller (14), wherein the control apparatus (10) is designed to provide a start / stop signal for starting and stopping the at least one switching controller (14) depending on the radiation signal (VS) at the second output of said control apparatus. Furthermore, the invention relates to a corresponding method for operating at least one LED using such a switching arrangement.

Description

technical field [0001] The invention relates to a circuit arrangement for operating at least one LED, comprising: at least one switching regulator with an output for connection to at least one LED, at least one short-circuit switch with control poles, wherein at least one LED The short-circuit switch is connected in parallel; and the control device has at least one radiation signal input terminal for inputting the radiation signal and an output terminal connected to the control electrode of the short-circuit switch. Furthermore, the invention relates to a corresponding method for operating at least one LED in such a circuit arrangement. Background technique [0002] The problem underlying the invention relates to the operation of LEDs, in particular power LEDs, used in imaging units, for example in projectors. Radiation signals are to be understood below in particular as radiation in the visible wavelength range and in the infrared wavelength range. Currently, the shortest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B33/0827Y02B20/346H05B33/0815H05B45/46Y02B20/30H05B45/20H05B45/3725
Inventor 拉尔夫·赫英彼得·尼德迈尔格奥尔格·福斯特
Owner OSRAM GMBH