Patent ID: 9538591
Date: 2017-01-03
CPC Classifications: H05B,Y02B

Claim:
1. A lighting apparatus comprising: a lighting unit comprising a plurality of LED groups each having one or more LEDs and configured to emit light in response to a rectified voltage, the plurality of LED groups including a first LED group which first emits light in response to the rectified voltage and provides a path for a first current; a driving circuit configured to provide one or more current paths to the plurality of LED groups, the one or more current paths being changed in response to a change of the rectified voltage; and one or more secondary current sources coupled to one or more of the plurality of LED groups excluding the first LED group, and each configured to provide a second current which differs according to the change of the rectified voltage, wherein the rectified voltage is distributed and supplied to the lighting unit and the secondary current source, and wherein the LED group coupled to the secondary current source performs primary light emission using the first current and the second current in response to the rectified voltage having a level equal to or more than the level which the first current provided through the first LED group reaches, and performs secondary light emission using the second current in response to the rectified voltage having a lower level than the level for the primary light emission.