LIGHT EMITTING DIODE DRIVING CIRCUIT AND LIGHT APPARATUS HAVING THE SAME

摘要

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.

主权项

1. A light emitting diode (LED) driving circuit configured to sequentially drive a plurality of series-coupled LED groups comprising at least one LED, the LED driving circuit comprising:
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.