Patent ID: 8779673

Claim:
An LED device, comprising: at least two light-emitting units, each said light-emitting unit including: at least one light-emitting diode ( 101 ); a voltage-limiting unit ( 105 ) connected in parallel with the at least one light-emitting diode ( 101 ), the voltage-limiting unit ( 105 ) including a semiconductor unit having a resistance that rapidly drops when subject to overvoltage; a voltage-limiting resistance ( 107 ) connected in parallel with the at least one light-emitting diode ( 101 ), the voltage-limiting resistance ( 107 ) including a resistive component; wherein said at least two of the light-emitting units are connected in series or series-parallel with a respective said at least one light-emitting diode ( 101 ) in each of said at least two light-emitting units having a same polarity.