Method of controlling light adjustment

A method of controlling light adjustment, comprising the steps of:

• (1) activating a power supply;
• (2) activating a digital control circuit to carry out an adjustment output voltage control mode, sense a signal from a light adjustment control switching circuit, and determine a light adjustment control mode;
• (3) in response to an LED power source operating in the adjustment output voltage control mode, adjusting luminance from 100% to N % and continuously adjusting luminance from N % to ≤0.01% wherein a 100% PWM signal output from a PWM driving signal circuit is unchanged, and a light adjustment signal collection circuit transmits a collected light adjustment signal having luminance between N % and ≤0.01% to the digital control circuit;
• (4) in response to the LED power source operating in a PWM adjustment control mode, adjusting luminance from 100% to N % and continuously adjusting luminance from N % to ≤0.01%;
• and
• (5) in response to a light adjustment luminance changed from 0.01% luminance to N % luminance, obtaining a light adjustment curve in either step (3) or (4).