Led lighting device

Abstract

Two LED arrays are connected in parallel, and the both ends of the parallel connection are connected to an alternating-current power supply AC. In each of the LED arrays, a capacitor and three LED blocks (the total of four components) are connected in series. In each of the LED blocks, two LEDs are connected in opposite directions. Connection points between components included in one of the two LED arrays are individually connected to connection points between components included in the other one of the two LED arrays via varistors. Even in the event that a disconnection failure occurs at any one of the LEDs, a path of a current via one of the varistors is formed for another one of the LEDs which is connected in series to the LED at which the disconnection failure has occurred. This can prevent the other LEDs from being turned off. Even in the event that a short-circuit failure occurs at any one of the varistors, the normal lighting operations of the LEDs can be maintained unless the LEDs have defects.

Dependencies are inferred from the claim text.