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Supply assembly for LED lighting module

A technology of light-emitting modules and power supply components, which is applied in the direction of electrical components, electroluminescent light sources, light sources, etc., and can solve problems such as energy loss

Inactive Publication Date: 2005-05-11
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage source is continuously on, even when the power to the LED lighting module is cut off, resulting in unnecessary energy loss

Method used

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  • Supply assembly for LED lighting module
  • Supply assembly for LED lighting module
  • Supply assembly for LED lighting module

Examples

Experimental program
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Effect test

Embodiment Construction

[0020] Such as figure 1 As shown, the power supply assembly 1 includes a power supply unit that provides current to the LED lighting module 2, preferably a controlled constant current source 1. The LED lighting module 2 , for example as an LCD backlight, includes a plurality of light emitting diodes (LEDs) 3 that can be connected in parallel or in series. This figure schematically shows that the pulse train control unit 4 can switch the constant current source on and off. For this purpose, the burst control unit 4 sends a burst control signal 5 consisting of pulses of duration Tpulse, which turns on the controlled constant current source 1 with the burst frequency fburst, as figure 2 shown. The burst frequency fburst should exceed the observable frequency of the human eye (about 70Hz), because the flicker produced by the LED light-emitting module at a lower frequency will be very disturbing (compare the monitor of the display tube). However, the burst frequency fburst shou...

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PUM

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Abstract

A supply assembly for a LED lighting module, comprising a supply unit to which the LED lighting module can be connected and a burst control unit which is capable of switching the power supply unit on and off with a burst frequency (fburst) so as to control the mean light output. Preferably, the burst control unit is provided with a pulse duration modulator for controlling the pulse length (T pulse) during which the supply unit is operative.

Description

technical field [0001] The present invention relates to a power supply assembly of an LED light-emitting module, which includes a power supply unit that can be connected to the LED light-emitting module and a pulse train control unit, and the controller can turn on and off the power supply (voltage or current) of the LED light-emitting module at a pulse train frequency The switch is turned off so as to control the average light output of the LED lighting module. Background technique [0002] LED lighting modules are increasingly used to illuminate objects. They are also used as signal lights, for example in traffic lights. The light output of the LED lighting module can be controlled by various known methods. One of the methods is to control (turn down) the intensity of the current through the module. This approach has the disadvantage that at amperages below about 20% of the rated amperage, the relationship between amperage and light output becomes substantially non-line...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B37/02H01L33/00H05B44/00
CPCH05B45/10H05B45/327Y02B20/30H05B45/375H05B45/3725H05B45/18H05B45/12H05B45/345H05B45/385G09G3/20
Inventor R·A·A·M·雅各布斯B·J·E·洪特勒A·A·M·马里努斯
Owner SIGNIFY HLDG BV