Patent ID: 8749169

Claim:
An LED device, comprising: at least one first light emitting unit and at least one second light emitting unit, each said light emitting unit including: at least one light emitting diode ( 101 ); a voltage-limiting unit ( 105 ) including a semiconductor unit having a resistance that rapidly drops when subject to overvoltage; a voltage-equalizing resistance ( 107 ) including a first resistive unit parallel connected at two ends of said at least one light emitting diode ( 101 ); and a current-limiting resistance ( 111 ) including a second resistive unit and installed between the light emitting diode ( 101 ) and the voltage-limiting unit ( 105 ), wherein the voltage-limiting unit ( 105 ) is series connected with the current-limiting resistance ( 111 ) and parallel-connected with both the voltage-equalizing resistance and the light emitting diode ( 101 ), wherein said light emitting diode ( 101 ) in the at least one first light emitting unit is connected in series with and has a same polarity as said light emitting diode ( 101 ) in said at least one second light emitting unit to form a same-polarity light emitting unit set, and wherein two ends of the same-polarity light-emitting unit set are connected in parallel with a diode ( 106 ) having a polarity that is opposite in polarity with the series-connected first and second light emitting diodes ( 101 ).