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Device for supplying a plurality of LED units with power

A technology of equipment and energy, applied in the field of equipment for supplying energy to multiple LED units, capable of solving problems such as different voltages

Active Publication Date: 2012-10-24
CONTINENTAL AUTOMOTIVE TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Efficient and cost-effective control is desirable in the case of multiple LED units, the problem to be overcome then being to set the different voltage values ​​with superimposed disturbances in such a way that the LEDs do not produce flickering light, wherein Interference can occur, for example, in the on-board electrical system of a motor vehicle
The problem however is that with a given current through multiple LEDs there may be different voltage drops across the LEDs due to the different LEDs

Method used

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  • Device for supplying a plurality of LED units with power
  • Device for supplying a plurality of LED units with power
  • Device for supplying a plurality of LED units with power

Examples

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Embodiment Construction

[0032] in figure 1 The basic structure of the device 1 for supplying energy to the LED is completely schematically shown in figure 1 Only the LED 2 in a single LED unit 3 is shown in exemplarily and schematically. The device 1 contains a DC / DC converter 4, also referred to below as a DC voltage converter, wherein the DC / DC converter 4 is implemented as a so-called boost converter, ie its output voltage U out Higher than its input voltage U in . In the case of LED light equipment for motor vehicles, the input voltage U in Is the onboard power grid voltage, which can be between 9V and 16V, for example.

[0033] Output voltage U of boost converter 4 out It is fed to another converter, a so-called buck converter 5, which controls the LED unit 3 on its side. Here, the LED unit 3 is supplied with a regulated current I 3 . This current adjustment is therefore important because the light color of the corresponding LED 2 is adjusted via the current. Accordingly, in multiple LED unit...

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PUM

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Abstract

The invention relates to a device (1) for supplying a plurality of LED units (3) with power, comprising a common DC / DC converter (4) which delivers a regulated output voltage and to which a plurality of strands (6) are connected, each having a buck converter (5) and an LED unit (3) connected thereto, and means (8) for regulating or setting the strand currents (I3) to be supplied to the LED units (3). In order to simplify the device, the means for regulating or setting the strand currents are formed by a central, common processor (10), which is supplied with actual values (7A) in keeping with the individual strand currents (I3) and connected to corresponding control inputs of the respective buck converters (5) for applying control values (8A) calculated on the basis of the actual values.

Description

Technical field [0001] The present invention relates to a device for supplying energy to a plurality of LED units. The device has a common DC / DC converter that emits a regulated output voltage, and a plurality of them respectively have a step-down converter and a step-down converter. The branch of the LED unit connected to the converter is connected to the DC / DC converter, and the device is used to adjust or adjust the branch current to be delivered to the LED unit. Background technique [0002] In newer lighting devices, especially also in the light equipment of motor vehicles, light-emitting diodes (LEDs) are increasingly used. This LED lighting device has many advantages, such as small size, low power requirements, etc., but unlike traditional light-emitting devices, this LED lighting device requires a certain current in order to achieve a certain brightness on the one hand and radiation on the other Determine the color. Therefore, it is common in LED lighting devices to adj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B33/0818H05B33/0815H05B33/083H05B45/48H05B45/375H05B45/38
Inventor C.施特格
Owner CONTINENTAL AUTOMOTIVE TECH GMBH