LIGHT EMITTING DIODE LIGHTING DEVICE DRIVEN BY A UNIFORM ALTERNATING CURRENT
First Claim
1. A light emitting diode (LED) lighting device driven by a uniform alternating current, comprising:
- at least two LED modules, each of the LED modules comprising a first polarity LED bar and a second polarity LED bar coupled in parallel; and
at least two current balancing units, each of the current balancing units being electrically connected to individual the LED module, receiving a sinusoidal AC voltage to alternative driving the first LED bar and the second LED bar.
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Abstract
The invention is disclosed a lighting device using an alternating current to drive light emitting diodes (LEDs). The lighting device uses at least two parallel-connected LED modules. In front of each LED module has connected to a current balancing unit in series that has same capacitance or inductance. The LED module comprises a first polarity LED bar and a second polarity LED bar connected in parallel. The LED module receives an alternating current voltage from the current balancing unit, which alternatively drive the first polarity LED bar and the second polarity LED bar. The light device uses different impedances of the current balancing unit and the LED to provide smooth and uniform current to the LED module and achieves a stable luminance.
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Citations
10 Claims
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1. A light emitting diode (LED) lighting device driven by a uniform alternating current, comprising:
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at least two LED modules, each of the LED modules comprising a first polarity LED bar and a second polarity LED bar coupled in parallel; and at least two current balancing units, each of the current balancing units being electrically connected to individual the LED module, receiving a sinusoidal AC voltage to alternative driving the first LED bar and the second LED bar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification