Patent ID: 9144128
Filing Date: 2015-09-22
Classification: H05B

Abstract:
1. A dimming system of a lamp using a light-emitting device, the dimming system comprising: a power source including a power input terminal to which an external alternating current power source is applied, a dimmer connected to the power input terminal to receive an alternating current voltage applied, and a rectifier circuit for the output voltage of the dimmer; a lighting unit including light-emitting devices from a first light-emitting device positioned at the shortest distance from a connection point with the power source to an n a light-emitting drive unit including a plurality of switching circuits individually connected to an output terminal of each of the light-emitting devices constituting the lighting unit to form a current supply channel for the corresponding LED, and dimmer control circuits connected to the switching circuits of the first light-emitting device and configured to sense whether or not a current supply channel for the first light-emitting device is normally operated, and thereafter, to output a control signal according to a result of the sensing; and a dimmer drive unit parallel-connected to a connection line between the power source and a power input terminal of the first light-emitting device to form a bleeding current supply channel, and having a switch configured to turn on/off the bleeding current supply channel depending on a control signal of the dimmer control circuits.