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Method for operating lighting device, lighting device and motor vehicle

A lighting device and light source technology, applied in the direction of lighting devices, light sources, electrical components, etc., to achieve the effect of minimizing loss

Inactive Publication Date: 2018-03-16
OSRAM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the power loss is 6V x 1A = 6W

Method used

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  • Method for operating lighting device, lighting device and motor vehicle
  • Method for operating lighting device, lighting device and motor vehicle
  • Method for operating lighting device, lighting device and motor vehicle

Examples

Experimental program
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Embodiment Construction

[0029] The examples set forth in detail below are preferred embodiments of the present invention. It should be noted here that the individual features can be realized not only in the stated combination of features, but also individually or in different technically meaningful combinations.

[0030] For example, lighting devices in motor vehicles with a plurality of LEDs should be operated as loss-free as possible and with low radiation. In particular, for example the low beam or high beam of a motor vehicle can be realized in this way. LEDs represent all possible light sources, especially semiconductor light sources. The reference to a motor vehicle is purely exemplary and the invention can also be used for other purposes.

[0031] Now seek: use linear or resistive drivers for lighting fixtures. The lighting device has a relatively simple construction, ie only one resistor is connected in series with the load or light source, possibly in the case of a resistor driver. Alter...

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PUM

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Abstract

A lighting device having a plurality of light sources can operate with low loss and low interference. Correspondingly, a lighting device and a corresponding operating method are provided. The operating method comprises measuring the supply voltage of the lighting device and automatically ascertaining a number of light sources (L11-L38) in at least one branch, and connecting the plurality of lightsources (L11-L38) in series in the branch. The ascertained number corresponds to the largest integer number which, multiplied by a prespecifiable forward voltage of each of the light sources, is lessthan the measured supply voltage. Furthermore, each light source carries out light-opening and light-adjusting through a switch connected in parallel with the light source. Each branch or each light source is provided with a linear driver, and the linear driver can operate the branch or the light source in a preset current with low loss. The invention also relates to a motor vehicle having the lighting device.

Description

technical field [0001] The invention relates to a method for operating a lighting device and a lighting device having a plurality of light sources, wherein the light sources can be interconnected as a function of an input voltage and each light source can be switched or dimmed individually. [0002] The invention relates to a method for operating a lighting device with a plurality of light sources, the lighting device being operated by measuring a supply voltage and, depending on the measured supply voltage, coupling the light sources into one or Multiple parallel branches. Here, the light sources in each branch are respectively connected in series. Furthermore, the invention relates to a lighting device having a plurality of light sources, wherein a supply voltage is measured and the light sources are connected into one or more parallel branches as a function of the measured supply voltage. Here, the light sources in each branch are respectively connected in series. Furthe...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/44H05B45/395H05B45/10H05B45/345H05B45/36H05B45/46H05B45/48
Inventor 马丁·布吕克尔
Owner OSRAM GMBH