Patent ID: 9282607
Filing Date: 2016-03-08
CPC Classification: H05B,Y02B

Claim Text:
1. An LED device with shared voltage-limiting unit and individual voltage-equalizing resistance, comprising: a light-emitting unit, comprising a plurality of LEDs connected in series and in a same polarity; a plurality of voltage-equalizing resistance corresponding to said plurality of LEDs, wherein each voltage-equalizing resistance is connected in parallel at ends of a corresponding LED; and the shared voltage-limiting unit connected in parallel at two ends of two or more than two of the series-connected LEDs, the voltage-limiting unit including a semiconductor unit having a resistance that is rapidly reduced when subject to overvoltage and the voltage-equalizing resistance including a resistive component; wherein when a surge voltage from a power source is generated, the surge voltage can be absorbed by the shared voltage-limiting unit and the voltage is evenly distributed by the voltage-equalizing resistance to two ends of the LED connected in parallel with each voltage-equalizing resistance, so that each LED is protected from being damaged due to instant overvoltage.