Patent ID: 9204517
Filing Date: 2015-12-01
Classification: H05B,Y02B

Abstract:
1. A light emitting device driving apparatus for controlling a light emitting unit including a plurality of light emitting device arrays connected in series, comprising: a rectifier for rectifying an AC signal and outputting a ripple current signal based at least in part on the rectified AC signal; a current adjuster for outputting a selection voltage; a power supply for receiving the ripple current signal and generating an internal voltage and a plurality of selective voltages; and a sequential driving controller connected to channel lines, the channel lines connected to respective output terminals of the light emitting device arrays, wherein the sequential driving controller: wherein the current adjuster: performs analog-digital conversion upon a setting voltage wherein the setting voltage is a voltage divided from the internal voltage and the divided voltage is generated based on an external resistor; generates a digital value according to a result of the analog-digital conversion; and outputs one of the plurality of selective voltages as the selection voltage based on the digital value.