LED BULB WITH COLOR-SHIFT DIMMING

摘要

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.

主权项

1. 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, anda 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.