Patent ID: 8581515

Claim:
A light emitting diode driver, comprising: a power supplier including a primary side and a secondary side electrically insulated from each other and configured to switch an input power at the primary side, convert the switched power into a driving power having a previously set voltage level at the secondary side, and supply the driving power to at least one light emitting diode (LED) channel; a driver configured to control supply and interruption of the driving power to the at least one LED channel from the power supplier to drive the at least one LED channel, and control switching of the power supplier according to a state of the driving power supplied to the at least one LED channel; and a transfer unit configured to transfer a switching control signal for controlling the switching of the power supplier from the driver, from the secondary side to the primary side of the power supplier, wherein the driver includes: a switch unit connected between the at least one LED channel and a ground and configured to switch the supply or interruption of the driving power to the at least one LED channel; and a controller configured to detect the state of the driving power supplied to the at least one LED channel to control the switching of the switching unit, generate the switching control signal according to the state of the detected driving power, and transfer the generated switching control signal to the transfer unit.