LED bulb with color-shift dimming
AssigneeSwitch Bulb Company, Inc.
InventorRonan Le Toquin
Life of this patent
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Abstract
A light-emitting diode (LED) bulb comprises a base and a shell connected to the base. A first set of LEDs is disposed within the shell and is configured to emit light at a first color corresponding to a first black-body color temperature. A second set of LEDs is also disposed within the shell and is configured to emit light at a second color corresponding to a second black-body color temperature that is different from the first black-body color temperature. A control circuit is configured to provide a transitional-power state to the first and second sets of LEDs to transition between an initial-power state and a reduced-power state by producing a shifting color output that corresponds to a predetermined light-output curve.
Claims18
A light-emitting diode (LED) bulb comprising:
- a base;
- a shell connected to the base;
- a first set of LEDs disposed within the shell, wherein the first set of LEDs is configured to emit light at a first color;
- a second set of LEDs disposed within the shell, wherein the second set of LEDs is configured to emit light at a second color that is different from the first color of the first set of LEDs;
- and
- a control circuit configured to provide:
- an initial-power state to the first and second sets of LEDs to produce a first bulb light output having a first predicted luminous flux and a first predicted color,
- a reduced-power state to the first and second sets of LEDs to produce a second bulb light output having a second predicted luminous flux and a second predicted color, and
- a transitional-power state to the first and second sets of LEDs to transition between the initial-power state and the reduced-power state, wherein the transitional-power state is configured to produce a shifting color output that corresponds to a predetermined light-output curve having a first point corresponding to the first predicted color and a second point corresponding to the second predicted color.
A liquid-filled light-emitting diode (LED) bulb comprising:
- a base;
- a shell connected to the base;
- a first set of LEDs disposed within the shell, wherein the first set of LEDs is configured to emit light at a first color;
- a second set of LEDs disposed within the shell, wherein the second set of LEDs is configured to emit light at a second color that is different from the first color of the first set of LEDs;
- a thermally conductive liquid held within the shell and disposed between the plurality of LEDs and the shell;
- and
- a control circuit configured to provide:
- an initial-power state to the first and second sets of LEDs to produce a first light output having a first predicted luminous flux and a first predicted color,
- a reduced-power state to the first and second sets of LEDs to produce a second light output having a second predicted luminous flux and a second predicted color, and
- a transitional-power state to the first and second sets of LEDs to transition between the initial-power state and the reduced-power state, wherein the transitional-power state is configured to produce a shifting color output that corresponds to a predetermined light-output curve having a first point corresponding to the first predicted color and a second point corresponding to the second predicted color.
A liquid-filled light-emitting diode (LED) bulb comprising:
- a base;
- a shell connected to the base;
- a first set of LEDs disposed within the shell, wherein the first set of LEDs is configured to emit light at a first color;
- a second set of LEDs disposed within the shell, wherein the second set of LEDs is configured to emit light at a second color that is different from the first color;
- a thermally conductive liquid held within the shell and disposed between the first and second set of LEDs and the shell;
- and
- a control circuit configured to provide a first power output to the first set of LEDs and a second power output to the second set of LEDs, wherein the second power output is independently adjustable with respect to the first power output to produce a bulb light output having a shifting color that corresponds to a predetermined light-output curve.
A method of making a light-emitting diode (LED) bulb, the method comprising:
- obtaining a base, a shell, a first set of LEDs, and a second set of LEDs;
- attaching the first and second set of LEDs to the base;
- connecting the shell to the base, wherein the first and second sets of LEDs are disposed within the shell;
- electrically connecting the first set of LEDs to a first power output of a control circuit;
- electrically connecting the second set of LEDs to a second power output of the control circuit, wherein the first power output is independently adjustable with respect to the second power output to produce a bulb light output having a shifting color that corresponds to a predetermined light-output curve;
- and
- filling the shell with a thermally conductive liquid, wherein the first and second set of LEDs are immersed in the thermally conductive liquid.
Dependencies are inferred from the claim text.