Current balance circuit for intelligent drive of led

PURPOSE: An LED illumination and a current balance circuit are provided to extend practical lifespan of a LED illumination and a lamp by identically controlling a current flowing in each LED element. CONSTITUTION: A current driving source(10) supplies a current to a four node(Nd4) which has a ground electric potential and a first node(Nd1). A first coil is connected between the first node and the second node(Nd2). An electromagnetic induction coil is connected between the first node and the third node(Nd3). A first LED(LED1) is connected between the second node and the fourth node. A second LED(LED2) is connected between the third node and the fourth node. The electromagnetic induction coil uses the principles of the mutual inductance.