Dimming module, solid state lighting device, and dimming method

A solid state lighting device, comprising:

• a first lighting module comprising a first color temperature;
• a second lighting module comprising a second color temperature different from the first color temperature;
• a first driving circuit, configured to receive a first driving voltage to drive the first lighting module;
• a second driving circuit, configured to receive a second driving voltage to drive the second lighting module;
• a phase control circuit, configured to output a control voltage signal, wherein when the phase control circuit receives a dimming command, the phase control circuit controls a phase delay angle of the control voltage signal according to the dimming command;
• and
• a processing circuit, electrically coupled to the phase control circuit, the first driving circuit, and the second driving circuit, and configured to receive the control voltage signal and adjust the first driving voltage signal and the second driving voltage signal according to the phase delay angle;
• wherein the phase control circuit outputs the non-full-phase control voltage signal with the phase delay angle to the processing circuit in one or more cycles and then the phase control circuit outputs the full-wave rectified voltage with full waveform;
• and
• wherein when the dimming command is a first type of dimming instructions, the phase delay angle comprises a first angle, and when the dimming command is a second type of dimming instructions different from the first type of dimming instructions, the phase delay angle comprises a second angle different from the first angle.

A dimming method, comprising:

• receiving, by a phase control circuit, a dimming command from an external device;
• determining, by the phase control circuit, the dimming command is a color temperature control command or a brightness control command;
• outputting a control voltage signal with a first phase delay angle when the dimming command is the brightness control command;
• outputting the control voltage signal with a second phase delay angle different from the first phase delay angle when the dimming command is the color temperature control command;
• adjusting a first driving voltage signal and a second driving voltage signal according to the control voltage signal;
• and
• driving a first lighting module and a second lighting module respectively according to the first driving voltage signal and the second driving voltage signal;
• and
• outputting a full-wave rectified voltage with full waveform after the non-full-phase control voltage signal with the first phase delay angle or the second phase delay angle in one or more cycles is outputted.