Patent ID: 11963278
Assignee: LEEDARSON LIGHTING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A lighting apparatus, comprising:
a surge voltage protector for coupled to an external power for relaying an AC power, wherein when there is a surge voltage is detected, the surge voltage protector disable routing the AC power;
a first rectifier coupled to the surge voltage protector, wherein the first rectifier comprises a first bridge circuit to covert the AC power to a first DC power;
a first DC-DC converter for converting the first DC power to a second DC power, the second DC power has a lower voltage than the first DC power;
a first DC filter for filtering the second DC power to a third DC power, wherein the third DC power has a lower frequency than the second DC power;
a first constant current source coupled to the first DC filter for receiving the third DC power as a first energy source;
a second rectifier coupled to the same surge voltage protector, wherein the second rectifier comprises a second bridge circuit to convert the AC power to a fourth DC power;
a second DC-DC converter for converting the fourth DC power to a fifth DC power, the fifth DC power has a lower voltage than the fourth DC power;
a second DC filter for filtering the fifth DC power to a sixth DC power, wherein the sixth DC power has a lower frequency than the fifth DC power;
a second constant current source coupled to the second DC filter for receiving the sixth DC power as a second energy source;
a first PWM generator for generating a first PWM signal based on a dimmer control signal;
a second PWM generator for generating a second PWM signal based on the dimmer control signal;
a dimmer controller coupled to the first PWM generator and the second PWM generator for converting an operation to the dimmer control signal,
a first light source coupled to the first constant current source to receive a first driving current from the first constant current source, wherein the first driving current is associated to the first PWM signal; and
a second light source coupled to the second constant current source to receive a second driving current from the second constant current source, wherein the second driving current is associated to the second PWM signal.