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US 10,143,052 B2Granted
Light emitting diode (LED) warm on dim circuit
AssigneeLuxTech, LLC
InventorRonald J. Lenk
Life of this patent
Estimating the term…
Abstract
A method and circuit to use light-emitting diodes to emulate the dimming performance of incandescent lighting, and more particularly, to making a circuit that uses only white and deep red light-emitting diodes to achieve a coordinated-color-temperature as a function of dim level that is close to that of an incandescent light being similarly dimmed.
Claims20
A light emitting diode (LED) dimmer circuit, comprising:
- at least one white LED;
- a first controllable current source coupled to the at least one white LED and configured to produce a current that increases linearly as a dimming level increases;
- at least one deep red LED;
- and
- a second controllable current source coupled to the at least one deep red LED and configured to produce a current that increases linearly as the dimming level increases, the dimming level having a maximum level.
2 more elements
An apparatus, comprising:
- at least one white light emitting diode (LED);
- a first controllable current circuit coupled to the at least one white LED, the first controllable current circuit having a resistor, the first controllable current circuit configured to receive a first current and produce a second current that increases linearly as a dimming level increases;
- at least one deep red LED;
- and
- a second controllable current circuit coupled to the at least one deep red LED, the second controllable current circuit having a resistor, the second controllable current circuit configured to receive the first current and produce a third current that increases linearly as the dimming level increases, the dimming level having a maximum level.
2 more elements
An apparatus, comprising:
- at least one white light emitting diode (LED);
- a first circuit coupled to the at least one white LED and including a resistor, the first circuit configured to produce a current that increases linearly as a dimming level increases;
- at least one deep red LED;
- and
- a second circuit coupled to the at least one deep red LED and including a resistor, the second circuit configured to produce a current that increases linearly as the dimming level increases, the dimming level having a maximum level.
2 more elements
Dependencies are inferred from the claim text.