Patent ID: 9468059
Filing Date: 2016-10-11
CPC Classification: H05B

Claim Text:
1. A light emitting device driving apparatus configured to control a light emitting unit including light emitting devices or array(s) thereof connected in series, comprising: a rectifier configured to rectify an AC signal, and supply to the light emitting unit a ripple current signal; a switch driver configured to selectively connect the channel lines and the first node in response to control signals; a current controller connected between the first node and a ground potential, the current controller generating the reference current; a logic controller configured to adjust the level and/or value of the reference current based on a level of the ripple current signal, and generate the control signals; a power supply configured to receive the ripple current signal, and generate an internal voltage and the plurality of selective voltages; and a current adjuster configured to select one of the plural selective voltages, wherein the current adjuster comprises: