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device for supplying energy to a plurality of led units

A device and energy technology, applied in the field of devices used to supply energy to multiple LED units, can solve problems such as different voltages

Active Publication Date: 2016-07-20
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 energy to a plurality of led units
  • device for supplying energy to a plurality of led units
  • device for supplying energy to a plurality of led units

Examples

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Embodiment Construction

[0032] exist figure 1 The basic structure of a device 1 for supplying energy to LEDs is shown completely schematically in figure 1 Only the LED 2 in a single LED unit 3 is shown exemplarily and schematically in . 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 step-up converter, ie its output voltage U out above its input voltage U in . In the case of LED light equipment for motor vehicles, the input voltage U in is the vehicle electrical system voltage, which can be between 9V and 16V, for example.

[0033] The output voltage U of the boost converter 4 out It is supplied to a further converter, the so-called step-down converter 5 , which actuates the LED unit 3 on its side. Here, the LED unit 3 is supplied with a regulated current I 3 . This current regulation is therefore important because the light color of the respective LED 2 is adjusted via the current. Accor...

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PUM

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Abstract

A device (1) for supplying energy to a plurality of LED units (3) is described, the device having a common DC / DC converter (4) delivering a regulated output voltage, a plurality each having a step-down conversion The branch (6) of the device (5) and the LED unit (3) connected to the buck converter is connected to the DC / DC converter, and the device has a function for regulating or adjusting the (3) means (8) of the branch current (I3); in order to simplify the device, the means for regulating or regulating the branch current are formed by a common central computing unit (10), said common central computing unit The delivered actual value (7A) corresponding to the respective branch current (I3) is received and connected to the corresponding regulation input of the corresponding step-down converter (5) for applying the regulation value calculated based on the actual value ( 8A).

Description

technical field [0001] The invention relates to a device for supplying energy to a plurality of LED units having a common DC / DC converter delivering a regulated output voltage, a plurality each having a step-down converter and with said step-down converter The branch of the LED unit connected to the switch is connected to said DC / DC converter, and the device is provided for regulating or adjusting the branch current to be delivered to the LED unit. Background technique [0002] Light-emitting diodes (LEDs) are increasingly being used in newer lighting devices, in particular also in light systems of motor vehicles. Such LED lighting devices have many advantages, such as small size, small power requirements, etc., but unlike conventional lighting devices, such LED lighting devices require a certain current in order to achieve a certain brightness on the one hand and radiate light on the other hand. OK color. It is therefore common in LED lighting to adjust the light color vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/48H05B45/375H05B45/38
Inventor C.施特格
Owner CONTINENTAL AUTOMOTIVE TECH GMBH