US 11,895,955 B2
Combined LED lighting system for plant growth
Hongchuan Chen, Shenzhen (CN); Yuan Yang, Shenzhen (CN); Jiaqin Li, Shenzhen (CN); and Bing Ma, Shenzhen (CN)
Assigned to SHENZHEN NUMBER ENERGY SAVING CORPORATION, Guangdong (CN)
Filed by SHENZHEN NUMBER ENERGY SAVING CORPORATION, Guangdong (CN)
Filed on Jan. 19, 2021, as Appl. No. 17/152,018.
Application 17/152,018 is a continuation of application No. PCT/CN2020/072483, filed on Jan. 16, 2020.
Claims priority of application No. 202010042127.5 (CN), filed on Jan. 15, 2020.
Prior Publication US 2021/0212268 A1, Jul. 15, 2021
Int. Cl. A01G 7/04 (2006.01); H05B 45/325 (2020.01); H05B 47/19 (2020.01); A01G 9/24 (2006.01)
CPC A01G 7/045 (2013.01) [A01G 9/249 (2019.05); H05B 45/325 (2020.01); H05B 47/19 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A combined LED lighting system for plant growth, comprising an LED light track and at least one LED light strip which slidably connects with and longitudinally slides along the LED light track;
wherein:
a remote control signal receiver to receive a remote control signal is configured within the LED light track,
a processing device for processing the remote control signal received by the remote control signal receiver to generate a control signal for controlling a power of LED in each LED light strip is connected with each LED light strip, respectively;
an LED constant current power supply and a constant current control circuit are configured within the LED light strip, and
the constant current control circuit is connected with the processing device and receives the control signal regarding the power of the LED light strip sent from the processing device to control the LED constant current power supply;
wherein in the processing device, the control signal for controlling the power of the LED light strip in the remote control signal is converted into a PWM signal and sent to the constant current control circuit, and a duty ratio of the PWM signal is a percentage of a controlled maximum power of the LED light strip;
wherein the LED constant current power supply comprises an EMI filter and rectifier circuit, a critical conduction mode power factor correction (CRMPFC) circuit, an LLC half-bridge resonant circuit and an output rectifier and filter circuit,
a commercial power is filtered and rectified by the EMI filter and rectifier circuit and enters the CRMPFC circuit to form a high-voltage DC electrical signal, which enters the LLC half-bridge resonant circuit,
a switch of the LLC half-bridge resonant circuit is controlled by the PWM signal received by the constant current control circuit, and
a resonant signal output by the LLC half-bridge resonant circuit is rectified and filtered by the output rectifier and filter circuit and connected with an LED; and
wherein the combined LED lighting system for plant growth further comprises a negative feedback circuit, wherein the negative feedback circuit comprises an LED constant current sampling circuit, of which an output is connected with the constant current control circuit, and the constant current control circuit adjusts the PWM signal according to the output of the LED constant current sampling circuit.