Lighting circuit

摘要

A lighting circuit comprises a first rectifying diode (D1), a second rectifying diode (D2), a third rectifying diode (D3), a fourth rectifying diode (D4), a first group of LEDs (LED11, . . . , LED1n), a second group of LEDs (LED21, . . . , LED2n), a third group of LEDs (LED31, . . . , LED3n), and a fourth group of LEDs (LED41, . . . , LED4n). The first group of LEDs (LED11, . . . , LED1n) is connected between the anode and the cathode of the first rectifying diode (D1); the second group of LEDs (LED21, . . . , LED2n) is connected between the anode and the cathode of the second rectifying diode (D2); the third group of LEDs (LED31, . . . , LED3n) is connected between the anode and the cathode of the third rectifying diode (D3); the fourth group of LEDs (LED41, . . . , LED4n) is connected between the anode and the cathode of the fourth rectifying diode (D4).

主权项

1. A lighting circuit, comprising:
a first rectifier diode, a second rectifier diode, a third rectifier diode and a fourth rectifier diode, where a positive pole of the first rectifier diode is connected to a negative pole of the second rectifier diode, a negative pole of the first rectifier diode is connected to a negative pole of the third rectifier diode, a positive pole of the third rectifier diode is connected to a negative pole of the fourth rectifier diode, and a positive pole of the fourth rectifier diode is connected to a positive pole of the second rectifier diode; a first set of LEDs, a second set of LEDs, a third set of LEDs and a fourth set of LEDs, where a plurality of LEDs of the first set are connected in series and are connected to the first rectifier diode between its positive and negative poles, a plurality of LEDs of the second set are connected in series and are connected to the second rectifier diode between its positive and negative poles, a plurality of LEDs of the third set are connected in series and are connected to the third rectifier diode between its positive and negative poles, and a plurality of LEDs of the fourth set are connected in series and are connected to the fourth rectifier diode between its positive and negative poles; wherein in the positive half-wave period of an AC power, the first rectifier diode and the third set of LEDs in a same branch are powered on and the third set of LEDs emit light, and the fourth rectifier diode and the second set of LEDs in a same branch are powered on and the second set of LEDs emit light; in the negative half-wave period of the AC power, the third rectifier diode and the first set of LEDs in a same branch are powered on and the first set of LEDs emit light, and the second rectifier diode and the fourth set of LEDs in a same branch are powered on and the fourth set of LEDs emit light; and the first rectifier diode, the second rectifier diode, the third rectifier diode and the fourth rectifier diode are integrated on a first chip layer, the plurality of LEDs connected in series are integrated on a second chip layer, and the second chip layer is formed on the first chip layer.