NSIP Law
Light emitting diode (LED) driving circuit with common current sensing resistor and configured to drive LED groups, method of driving the circuit and light apparatus having the same
A light emitting diode (LED) driving circuit that sequentially drive a plurality of series-coupled LED groups comprising at least one LED is provided. The LED driving circuit includes a plurality of mid nodes coupled to terminals of the plurality of the LED groups, a common node with a reference voltage, a switch unit configured to form a plurality of current movement paths between the common node and the plurality of the mid nodes and configured to select a current movement path based on a control signal, a current measuring unit configured to detect a current flow through the common node, and a current control unit configured to generate the control signal based on the detected current flow.
MagnaChip Semiconductor, Ltd.
G H
G09G H05B
inventional inventional
Seung-hwan Hyun-jung
Lee Kim