Patent ID: 9668316
Date: 2017-05-30
CPC Classifications: G09G,H05B,Y02B

Claim:
1. A backlight unit comprising: a plurality of light emitting strings, each of which comprises at least one light emitting diode and one light transistor that is electrically connected to the light emitting diode; and a driving controller configured to detect source voltages of a plurality of light transistors provided in the light emitting strings, wherein the driving controller is further configured to compare a source voltage of each of the light transistors with an overcurrent protection voltage and to turn off an operation of a corresponding light transistor having a source voltage level higher than the overcurrent protection voltage, wherein the driving controller comprises a plurality of operation parts configured to control operations of the light transistors, and each of the operation parts is electrically connected to a corresponding light transistor, and wherein the operation part comprises: