Single-wire dimming method

A single-wire dimming method, adapted for a dimmable lamp, wherein the dimmable lamp comprises at least a first color lamp and a second color lamp, wherein a control circuit of the dimmable lamp receives a power voltage, and controls the first color lamp and a second color lamp, wherein the single-wire dimming method comprises:

• providing a dimming interface, wherein the power voltage is chopped when the dimming interface is operated;
• dividing a AC period of the power voltage into a first phase period, a second phase period and a third phase period;
• chopping the power voltage at the first phase period when a user adjusts the dimmable lamp to show a first color light by the dimmable lamp;
• chopping the power voltage at the third phase period when a user adjusts the dimmable lamp to show a second color light by the dimmable lamp;
• and
• chopping the power voltage at the second phase period when a user adjusts the dimmable lamp to show a mixed color light by the dimmable lamp, wherein the mixed color light is mixed by the first color light and the second color light.