Lighting device employing ac-driven light-emitting diodes
First Claim
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1. A lighting device, comprising:
- an electronic converter; and
a circuit connected to an output of the electronic converter, the circuit comprising at least two parallel-connected light-emitting diodes of opposite pole in a first parallel branch and comprising at least two parallel-connected light-emitting diodes of opposite pole in a second parallel branch, and also comprising a capacitor and a coil,wherein the first parallel branch includes the capacitor and the second parallel branch includes the coil,wherein the light-emitting diodes of the first parallel branch emit white light having a first color temperature,wherein the light-emitting diodes of the second parallel branch emit white light having a second color temperature different from the first color temperature, andwherein an output frequency at the output of the converter is adjusted to adjust a ratio of an amount of the white light having the first color temperature and an amount of the white light having the second color temperature.
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Abstract
Disclosed is a lighting device including a circuit including at least two parallel-connected light-emitting diodes of opposite pole in a first parallel branch and comprising at least two parallel-connected light-emitting diodes of opposite pole in a second parallel branch, and also including a capacitor and a coil. At least one of the diodes emits red light, blue light, and/or white light.
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Citations
12 Claims
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1. A lighting device, comprising:
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an electronic converter; and a circuit connected to an output of the electronic converter, the circuit comprising at least two parallel-connected light-emitting diodes of opposite pole in a first parallel branch and comprising at least two parallel-connected light-emitting diodes of opposite pole in a second parallel branch, and also comprising a capacitor and a coil, wherein the first parallel branch includes the capacitor and the second parallel branch includes the coil, wherein the light-emitting diodes of the first parallel branch emit white light having a first color temperature, wherein the light-emitting diodes of the second parallel branch emit white light having a second color temperature different from the first color temperature, and wherein an output frequency at the output of the converter is adjusted to adjust a ratio of an amount of the white light having the first color temperature and an amount of the white light having the second color temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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providing a lighting device, comprising;
an electronic converter; and
a circuit connected to an output of the electronic converter, the circuit comprising at least two parallel-connected light-emitting diodes of opposite pole in a first parallel branch and comprising at least two parallel-connected light-emitting diodes of opposite pole in a second parallel branch, and also comprising a capacitor and a coil, wherein the first parallel branch includes the capacitor and the second parallel branch includes the coil, wherein the light-emitting diodes of the first parallel branch emit white light having a first color temperature, and wherein the light-emitting diodes of the second parallel branch emit white light having a second color temperature different from the first color temperature; andadjusting an output frequency at the output of the converter to adjust a ratio of an amount of the white light having the first color temperature and an amount of the white light having the second color temperature which is emitted by the lighting device. - View Dependent Claims (12)
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Specification