Patent ID: 9345079
Filing Date: 2016-05-17
CPC Classification: H05B,Y02B

Claim Text:
1. An apparatus, comprising: a first channel of first light emitting devices (LEDs); a second channel of second LEDs , at least one of the second LEDs having at least one of a different color and a different color temperature than at least one of the first LEDs; and a driver for driving the first and second channels of LEDs, the driver including: a first stage converter configured to receive a first DC voltage and to output a second DC voltage, a second stage converter configured to receive the second DC voltage and to generate an output voltage that causes a first current to flow through the first channel of LEDs and a second current to flow through the second channel of LEDs, a current control device configured to control the second current flowing through to the second channel of LEDs in response to a control signal, and a feedback device configured to sample at least one of the first current and the second current and in response thereto to control a switching operation of the second stage converter.