Power supply device for light elements and method for supplying power to light elements

Abstract

The present invention relates to a power supply device for light elements comprising a power supply unit (12), a first light element (30) having a first color, preferably white, a second and a third lThe present invention relates to a power supply device for light elements comprising a power supply unit (12), a first light element (30) having a first color, preferably white, a second and a third light element (34, 38) having second and third colors, preferably for tuning the color of the first light element, and a controllable switch (42) coupled in series to said third light element (38), wheight element (34, 38) having second and third colors, preferably for tuning the color of the first light element, and a controllable switch (42) coupled in series to said third light element (38), wherein said series connection of said third light element (38) and said switch is arranged in parallel to said second light element (34). The power supply device is characterized in that said power supprein said series connection of said third light element (38) and said switch is arranged in parallel to said second light element (34). The power supply device is characterized in that said power supply unit (12) has a first and a second output (20, 22), said first light element (30) being coupled to said first output (20) and said second and third light elements (34, 38) being coupled to said secly unit (12) has a first and a second output (20, 22), said first light element (30) being coupled to said first output (20) and said second and third light elements (34, 38) being coupled to said second output (22), said power supply unit (12) is adapted to provide adjustable, preferably independently adjustable, output signals at said first and said second output (20, 22), and said second and thond output (22), said power supply unit (12) is adapted to provide adjustable, preferably independently adjustable, output signals at said first and said second output (20, 22), and said second and third light elements (34, 38) and said power supply unit (12) are adapted such that said third light element (38) radiates light when the switch (42) is closed. The invention further relates to a methodird light elements (34, 38) and said power supply unit (12) are adapted such that said third light element (38) radiates light when the switch (42) is closed. The invention further relates to a methodfor supplying power to light elements. for supplying power to light elements.

Description

Technical field [0001] The present invention relates to a power supply device for a lamp element, comprising: a power supply unit; a first lamp element having a first color (preferably white); a second and a third lamp having a second and a third color A light element, which is preferably used to tune the color of the first light element; and a controllable switch coupled to the third light element. The invention also relates to a method for powering said lamp elements preferably of different colors. Background technique [0002] For example, the power supply device described above can be known from US 2003 / 0112229 A1. This document describes a driver for color light emitting diodes (LEDs). The driver includes a series connection of a first LED and a switch and a second series connection of two LEDs, wherein the two series connections are connected in parallel. In addition, the driver includes a third LED disposed between the input and output lines of the circuit. Finally, an...

AI Technical Summary

Problems solved by technology

[0007] But the cost of providing multiple power supplies is higher

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