Dimmable LED lamp
First Claim
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1. An LED lamp, comprising:
- an AC power source;
a varistor connected in series with the AC power source for regulating voltage spikes;
one or more bi-directional LED chips having a threshold on voltage connected in parallel, wherein the bi-directional LED chips are connected in series to the AC power source and in parallel to the varistor;
two or more resistors connected in series to each side of each bi-directional LED chip for regulating the voltage across the bi-directional chip;
one or more filters for reducing voltage spikes and harmonics and for increasing the duration during which the voltage applied across the bi-directional LED chip remains above the threshold on voltage required to illuminate bi-directional LED chip; and
a dimmer for changing the voltage applied across the bi-directional chips.
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Abstract
An LED lamp utilizes AC power and bi-directional LED chips to provide dimming capabilities. The dimming capabilities of the lamp reduce the junction temperature of the LEDs on the bi-directional LED chips and thus prolong the life expectancy of the LED lamp.
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Citations
4 Claims
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1. An LED lamp, comprising:
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an AC power source; a varistor connected in series with the AC power source for regulating voltage spikes; one or more bi-directional LED chips having a threshold on voltage connected in parallel, wherein the bi-directional LED chips are connected in series to the AC power source and in parallel to the varistor; two or more resistors connected in series to each side of each bi-directional LED chip for regulating the voltage across the bi-directional chip; one or more filters for reducing voltage spikes and harmonics and for increasing the duration during which the voltage applied across the bi-directional LED chip remains above the threshold on voltage required to illuminate bi-directional LED chip; and a dimmer for changing the voltage applied across the bi-directional chips. - View Dependent Claims (2, 3, 4)
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Specification