High power dimmer and dimming system having switchable power modes, dimming device and method for transmitting power and dimming commands

摘要

A dimming system is composed of a dimmer having switchable power modes and at least one lighting device. When the dimmer is in a non-dimming bypass mode, an input power is directly transmitted to the at least one lighting device with the dimmer being bypassed so that the circuit in the dimmer consumes no power. When the dimmer is in a dimming mode, an output selector of the dimmer outputs a dimming output power having a dimming command therein to each one of the at least one lighting device for each lighting device to decode the dimming command embedded in the dimming output power and perform a dimming operation according to the dimming command. As the dimming operation lasts briefly, the power consumed by the dimmer is extremely small. Accordingly, no heat dissipation issue arises and the present invention is applicable to all sorts of high power lighting devices.

主权项

1. A high power dimmer having switchable power modes comprising:
a power input terminal for receiving an AC power; a rectification circuit connected to the power input terminal for rectifying the AC power under a dimming mode to generate an output power; a dimming controller outputting a switching command and a dimming command under the dimming mode ; a power switch being normally on and turned on and off according to the dimming command to convert the output power into a dimming output power having the dimming command embedded therein; an output selector having:
a first input port connected to the power input terminal to receive the AC power;a second input port connected to the power switch to receive the dimming output power; andan output port selectively connected to the first input port or the second input port according to the switching command generated by the dimming controller; and a power and signal output terminal connected to the output port of the output selector to output the AC power or the dimming output power.