US 12,408,245 B2
Method for realizing multiple dimming control mode of LED power supply
Guobiao Wen, Meizhou (CN)
Assigned to Zhuhai Shengchang Electronics Co., Ltd., Zhuhai (CN)
Filed by Zhuhai Shengchang Electronics Co., Ltd., Zhuhai (CN)
Filed on Nov. 28, 2023, as Appl. No. 18/522,020.
Claims priority of application No. 202310990956.X (CN), filed on Aug. 8, 2023.
Prior Publication US 2025/0056689 A1, Feb. 13, 2025
Int. Cl. H05B 45/10 (2020.01); H05B 45/325 (2020.01)
CPC H05B 45/10 (2020.01) [H05B 45/325 (2020.01)] 4 Claims
OG exemplary drawing
 
1. A method for realizing a multiple dimming control mode of an LED power supply, applied to an LED power supply, the LED power supply comprising: a power supply main drive module, a power MOS tube, a DC dimming control module, a dimming signal collection module, a main control module and a mode switching module; the power supply main drive module being coupled to a lamp, the DC dimming control module, and the dimming signal collection module; the power MOS tube being installed on a connecting path of the power supply main drive module and the lamp; the main control module being coupled to the power MOS tube, the DC dimming control module, the dimming signal collection module and the mode switching module, characterized in that the method comprises the steps of:
detecting a status signal of the mode switching module by the main control module and determining a current dimming control method according to the status signal;
transmitting a dimming signal of the dimming signal collection module to the main control module, generating a corresponding dimming control signal based on the main control module according to the dimming signal, sending the corresponding dimming control signal to DC dimming control module, and controlling an output voltage of the power supply main drive module based on the DC dimming control module according to the dimming control signal to change a lamp brightness, if the dimming control method takes a DC dimming control mode;
using the main control module to output a maximum voltage control signal to the DC dimming control module, so that the power supply main drive module outputs a maximum voltage, and using the main control module to sample and analyze a signal size of the dimming signal collection module, and outputting a corresponding PWM drive signal to the power MOS tube to change the lamp brightness, if the dimming control method takes a PWM dimming control mode; and
using the main control module to output the maximum voltage control signal to the DC dimming control module, so that the power supply main drive module outputs a maximum voltage, using the main control module to sample and analyze the signal size of the dimming signal collection module, and outputting a corresponding PWM combined with PWM frequency conversion drive signal to the power MOS tube to change the lamp brightness, if the dimming control method takes a PWM combined with PWM frequency conversion dimming control mode.