LED dimming control method and LED dimming driving device

A light-emitting diode (LED) dimming control method, comprising:

• controlling, by an LED dimming driving device comprising a digital-to-analog converter (DAC) control signal generating unit and an LED driving signal generating unit, a working current of an LED light-emitting element;
• generating, from the DAC control signal generating unit, a first control signal and a second control signal, wherein the first control signal is input to the LED driving signal generating unit to generate a first driving current I1, the second control signal is input to the LED driving signal generating unit to generate a second driving current I2, the first driving current is less than a maximum power current value Ipeak corresponding to a peak power of the LED driving signal generating unit, the second driving current I2 is greater than the maximum power current value Ipeak corresponding to the peak power of the LED driving signal generating unit, the LED driving signal generating unit with the first driving current I1 and the second driving current I2 are both in a low-power operating state, and the first driving current I1 generated by the LED driving signal generating unit is non-zero;
• and
• adjusting a first control signal duration and a second control signal duration to realize eight stable output points of LED dimming, wherein each stable point corresponds to different levels of LED brightness.