LED LIGHT-EMITTING DEVICE

摘要

An LED light-emitting device is provided, comprising: a plurality of LED light-emitting units (3) cascaded connected, which comprises LED light-emitting modules; and a constant current source power supply unit (2) connecting with one of the plurality of the LED light-emitting units (3); the constant current source power supply unit (2) is used for supplying a constant current for the LED light-emitting unit (3) connected with it, and other LED light-emitting units (3) obtain the constant current from their respective proceeding stages and supply the constant current for their respective following stages; the LED light-emitting units (3) transform the constant current received to the constant current required by every LED for light-emitting in their corresponding LED light-emitting modules to drive their corresponding LED light-emitting modules illuminating. The present invention realizes a cascaded transmission of power supply for a plurality of LED light-emitting units (3) and presents the advantages of simple design of circuit and less cost, comparing with the power supply means in the prior art using an LED light-emitting device with a plurality of LED light-emitting modules.