Patent ID: 9137864
Filing Date: 2015-09-15
Classification: H05B,Y02B

Abstract:
1. A light emitting diode (LED) lighting device, comprising: a transformer having a primary winding on a receiving path to receive electric energy from an energy source and a secondary winding on a driving path, a terminal of the receiving path and a terminal of the driving path having a same voltage level; a primary switch configured to switch on the receiving path to receive and store the electric energy in the transformer, and to switch off the receiving path to allow the driving path to deliver the stored electric energy, wherein the stored electric energy is discharged exclusively to one LED array of a plurality of LED arrays in each clock cycle of a controller before the primary switch is switched on again, the controller independently controlling each LED array that is connected in parallel with a capacitor; a first LED array of the LED arrays coupled to the driving path to emit light in response to the delivered electric energy; a first driving switch configured to couple the first LED array to the driving path to receive the electric energy from the driving path; and a bleed circuit configured to adjust a turn-on time of a bleed switch of the bleed circuit in a clock cycle of a colored light to adjust a light emitting power of the colored light, the bleed circuit including a resistor and the bleed switch coupled together in series to the driving path, the resistor coupled to the plurality of LED arrays in parallel, the bleed switch coupled to a plurality of driving switches in parallel.