Provided is a Light Emitting Diode (LED) lamp. The LED lamp includes: four external connection pins including at least two connection pins connected to a ballast stabilizer for a fluorescent lamp; an LED array in which a plurality of LEDs are connected in series; and at least a pair of capacitors formed between the LED array and the external connection pin, wherein in each of the at least a pair of capacitors, two polarized capacitors are connected in series with a back-to-back method.
1. A Light Emitting Diode (LED) lamp, comprising:
four external connection pins comprising at least two connection pins connected to a ballast stabilizer for a fluorescent lamp;
an LED array in which a plurality of LEDs are connected in series; and
at least a pair of capacitors formed between the LED array and the external connection pin,
wherein in each of the at least a pair of capacitors, two polarized capacitors are connected in series with a back-to-back method.
2. The LED lamp of claim 1 , wherein the polarized capacitors each have capacitance of 1-100 μF.
3. The LED lamp of claim 1 , wherein the at least a pair of capacitors comprise:
a first capacitor pair having one end connected to a first connection pin and the other end connected to an anode terminal of the LED array;
a second capacitor pair having one end connected to a second connection pin and the other end connected to a cathode terminal of the LED array;
a third capacitor pair having one end connected to a third connection pin and the other end connected to an anode terminal of the LED array; and
a fourth capacitor pair having one end connected to a fourth connection pin and the other end connected to a cathode terminal of the LED array.
4. The LED lamp of claim 3 , further comprising at least one diode formed between the at least one capacitor pair and the LED array.
5. The LED lamp of claim 4 , wherein the at least one diode comprises:
a first diode connected in series between the first capacitor pair and an anode terminal of the LED array;
a second diode connected in series between the second capacitor pair and a cathode terminal of the LED array;
a third diode connected in series between the third capacitor pair and an anode terminal of the LED array; and
a fourth diode connected in series between the fourth capacitor pair and a cathode terminal of the LED array.
6. The LED lamp of claim 4 , wherein the at least one diode comprises:
a first diode having an anode connected to the other end of the first capacitor pair and a cathode connected to an anode terminal of the LED array;
a second diode having a cathode connected to the other end of the second capacitor pair and an anode connected to a cathode terminal of the LED array;
a fifth diode having an anode connected to the anode of the second diode and a cathode connected to the anode of the first diode; and
a sixth diode having an anode connected to a cathode of the second diode and a cathode connected to the cathode of the first diode.
7. The LED lamp of claim 4 , wherein the at least one diode comprises:
a third diode having an anode connected to the other end of the third capacitor pair and a cathode connected to an anode terminal of the LED array;
a fourth diode having a cathode connected to the other end of the fourth capacitor pair and an anode connected to a cathode terminal of the LED array;
a seventh diode having an anode connected to the cathode of the fourth diode and a cathode connected to the cathode of the third diode; and
an eighth diode having an anode connected to the anode of the fourth diode and a cathode connected to the anode of the third diode.
8. The LED lamp of claim 4 , wherein the at least one diode comprises:
a first diode having an anode connected to the other end of the first capacitor pair and a cathode connected to an anode terminal of the LED array;
a second diode having a cathode connected to the other end of the second capacitor pair and an anode connected to a cathode terminal of the LED array;
a third diode having an anode connected to the other end of the third capacitor pair and a cathode connected to an anode terminal of the LED array;
a fourth diode having a cathode connected to the other end of the fourth capacitor pair and an anode connected to a cathode terminal of the LED array;
a fifth diode having an anode connected to the anode of the second diode and a cathode connected to the anode of the first diode;
a sixth diode having an anode connected to the cathode of the second diode and a cathode connected to the cathode of the first diode;
a seventh diode having an anode connected to the cathode of the fourth diode and a cathode connected to the cathode of the third diode; and
an eighth diode having an anode connected to the anode of the fourth diode and a cathode connected to the anode of the third diode.
9. A Light Emitting Diode (LED) lamp, comprising:
four external connection pins comprising at least two connection pins connected to a ballast stabilizer for a fluorescent lamp;
an LED array in which a plurality of LEDs are connected in series;
at least one capacitor unit formed between the LED array and the external connection pin and having capacitance of 10-100 μF; and
at least one capacitor unit comprises a pair of polarized capacitors connected with a back-to-back method.
10. The LED lamp of claim 9 , wherein the at least one capacitor unit comprises at least one non-polar capacitor.
11. The LED lamp of claim 9 , wherein the at least one capacitor unit comprises:
a first capacitor unit having one end connected to a first connection pin and the other end connected to an anode terminal of the LED array;
a second capacitor unit having one end connected to a second connection pin and the other end connected to a cathode terminal of the LED array;
a third capacitor unit having one end connected to a third connection pin and the other end connected to an anode terminal of the LED array; and
a fourth capacitor unit having one end connected to a fourth connection pin and the other end connected to a cathode terminal of the LED array.