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Operation equipment for luminous diode

A technology of light-emitting diodes and circuit devices, applied in the field of circuit devices, can solve the problems of electromagnetic incompatibility radio, interference, high cost of filtering and shielding forms, and achieve the effect of reducing electromagnetic interference and reducing the amplitude

Inactive Publication Date: 2003-09-10
PATENT TREUHAND GESELLSCHAFT FUR ELECTRIC GLUEHLAMPEN MBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to electromagnetic incompatibility or radio interference, especially in the case of long connecting lines
In order to prevent this and to comply with the relevant norms (eg CISPR 15), high costs in the form of filtering and shielding are often required

Method used

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  • Operation equipment for luminous diode
  • Operation equipment for luminous diode
  • Operation equipment for luminous diode

Examples

Experimental program
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Embodiment Construction

[0022] attached figure 1 A block circuit diagram of a circuit arrangement according to the invention for operating LEDs is shown in . The electronic converter 1 provides the power supply voltage V1 to the dimming module 2 at the connection points J1, J2. The dimming module 2 provides the output voltage V2 to the LED 3 at the connection points J3, J4. A section of the first connecting line leading from the electronic converter 1 to the LED 3 is formed by the connection in the dimming module 2 from the connection point J1 to the connection point J2 . A section of the second connecting wire leading from the electronic converter 1 to the LED 3 leads from the connection point J22 to the connection point J4 through the electronic switch S1 in the dimming module. The control circuit 4 controls the electronic switch S1 in such a way that the LED 3 is operated in pulsed operation. According to the invention, a pull-down resistor R2 is connected parallel to electronic switch S1. The...

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PUM

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Abstract

The present invention provides a circuit having an electronic switch for the LED operating current, characterized in that the device has a pull-down device in parallel with the electronic switch, the resistance of the pull-down device is dimensioned so that the ratio of the operating current with the switch closed to the operating current with the switch open is described by a reduction factor of at least 10. Thus the electromagnetic interference of the circuit device is reduced.

Description

technical field [0001] The invention relates to a circuit arrangement according to the preamble of claim 1 . In particular, this relates to an electronic operating device for operating light-emitting diodes, which has a device for regulating the effective value of the operating current of the light-emitting diodes, wherein the device has a pulsed mode of operation. Background technique [0002] For operating light-emitting diodes, hereinafter referred to as LEDs, the following circuit arrangement is developed: A power source, such as a public network or a storage battery, supplies an electronic converter that supplies the mains voltage. LEDs are usually connected to the supply voltage via two connection lines. One or more LEDs can be operated on one supply voltage. Several LEDs are usually connected in series and form a so-called shunt. Several sub-circuits can be connected in parallel, wherein a transverse connection between the sub-circuits is al...

Claims

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Application Information

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IPC IPC(8): H05B44/00
CPCH05B33/0818H05B45/3725
Inventor U·弗兰切斯库蒂G·希拉
Owner PATENT TREUHAND GESELLSCHAFT FUR ELECTRIC GLUEHLAMPEN MBH
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