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, 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.
2. The liquid-filled LED bulb of claim 1, wherein the predetermined light-output curve is a non-linear curve in Ccc-Ccy color space.
3. The liquid-filled LED bulb of claim 1, wherein the predetermined light-output curve approximates a predicted light output of an ideal Planckian black-body emitter.
4. The liquid-filled LED bulb of claim 1, wherein the first predicted luminous flux is greater than the second luminous flux, and wherein the first predicted color corresponds to a first predicted black-body color temperature that is greater than a second predicted black-body color temperature corresponding to the second predicted color.
5. The liquid-filled LED bulb of claim 1, wherein the first and second light outputs correspond to a predicted first and second light output of an incandescent light bulb.
6. The liquid-filled LED bulb of claim 1, wherein the control circuit is configured to provide the transitional-power state in response to a control signal.
7. The liquid-filled LED bulb of claim 1, wherein the control circuit is configured to provide the transitional-power state in response to a change in an input power provided to the LED bulb.
8. The liquid-filled LED bulb of claim 1, wherein the control circuit is further 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 the shifting color output that corresponds to the predetermined light-output curve.
9. The liquid-filled LED bulb of claim 1, further comprising:
a third set of LEDs disposed within the shell, wherein the third set of LEDs is configured to emit light at a third color;
a fourth set of LEDs disposed within the shell, wherein the fourth set of LEDs is configured to emit light at a fourth color; and
a fifth set of LEDs disposed within the shell, wherein the fifth set of LEDs is configured to emit light at a fifth color.
10. The liquid-filled LED bulb of claim 9, wherein the control circuit is further configured to provide a third power output to the third set of LEDs, a fourth power output to the fourth set of LEDs, and a fifth power output to the fifth set of LEDs, and wherein the second, third, fourth, and fifth power outputs are independently adjustable with respect to the first power output to produce the shifting color output that corresponds to the predetermined light-output curve.
11. The liquid-filled LED bulb of claim 9, wherein
the first color corresponds to a first black-body color temperature of approximately 3,000 degrees K,
the second color corresponds to a second black-body color temperature of approximately 2,700 degrees K,
the third color corresponds to a third black-body color temperature of approximately 2,200 degrees K,
the fourth color corresponds to a fourth black-body color temperature of approximately 2,700 degrees K, and
the fifth color corresponds to a fifth black-body color temperature of approximately 2,700 degrees K.
12. 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.
13. The liquid-filled LED bulb of claim 12, wherein the predetermined light-output curve is a non-linear curve in Ccc-Ccy color space.
14. The liquid-filled LED bulb of claim 12, wherein the predetermined light-output curve approximates a predicted light output of an ideal Planckian black-body emitter.
15. The liquid-filled LED bulb of claim 12, wherein the first predicted luminous flux is greater than the second luminous flux, and wherein the first predicted color corresponds to a first predicted black-body color temperature that is greater than a second predicted black-body color temperature corresponding to the second predicted color.
16. 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.
17. The liquid-filled LED bulb of claim 16, wherein the control circuit is further configured to:
provide a full-power state to the first and second set of LEDs, the full-power state being associated with an initial first power level for the first set of LEDs, an initial second power level for the second set of LEDs, a first predicted luminous flux, and a first predicted color output;
provide a reduced-power state to the first and second set of LEDs, the reduced-power state being associated with a reduced first power level for the first set of LEDs, a reduced second power level for the second set of LEDs, a second predicted luminous flux, and a second predicted color output; and
provide a transitional-power state to the first and second set of LEDs, to transition between the initial-power state and the reduced-power state, wherein the transitional-power state is configured to produce the shifting color that corresponds to the predetermined light-output curve.
18. 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.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method to avoid a single point of failure in a system that includes at least two monitoring devices, at least two power supplies and a switching device coupled between the at least two monitoring devices and the at least two power supplies, the method comprising:
performing a test comprising:
placing a portion of a machine being monitored by the at least two monitoring devices in a first position;
causing the portion to cycle to a second position during a first cycle;
measuring a component of electrical power provided by a first power supply of the at least two power supplies while the portion cycles during the first cycle;
returning the portion to the first position;
causing the portion to cycle to the second position during a second cycle; and
measuring a component of electrical power provided by a second power supply of the at least two power supplies during the second cycle;
determining whether an amount of the component of electrical power provided by the first power supply during the first cycle or the component of electrical power provided by the second power supply during the second cycle is equal to or less than a minimum value;
generating an error code when at least one of the component of electrical power provided by the first power supply during the first cycle and the component of electrical power provided by the second power supply during the second cycle the is equal to or less than a minimum value; and
varying a position of one or more switches in the switching device based on the error code.
2. The method of claim 1, wherein the machine being monitored is a turbine.
3. The method of claim 2, wherein the at least two monitoring devices are linear variable differential transformers or rotary variable differential transformers.
4. The method of claim 2, wherein the portion is a flow control or pressure control valve, the first position is a fully closed position and the second position is a fully open position.
5. The method of claim 1, further comprising:
returning the portion to the first position after the second cycle;
causing the portion to cycle to the second position during a third cycle; and
measuring a component of electrical power provided by a third power supply during the third cycle;
wherein determining includes determining whether an amount of the component of electrical power provided by the third power supply during the third cycle is equal to or less than the minimum value.
6. The method of claim 1, wherein the component of electrical power provided by first power supply is one of current or voltage.
7. The method of claim 1, further comprising:
performing the test, determining and varying until the amount of the component of electrical power provided during either the first or second cycle is not equal to or less than the minimum value.
8. A method of correcting a single point of failure comprising:
placing a portion of a machine being monitored by a plurality of monitoring devices in a first position;
causing the portion to cycle to a second position during a first cycle;
measuring a component of electrical power provided by a first power supply unit while the portion cycles during the first cycle;
determining that an amount of the component of electrical power provided by the first power supply unit during the first cycle exceeds a threshold;
generating an error code that indicates that more than one monitoring device is coupled to the first power supply; and
varying a configuration of a switching device coupled between first and second power supplies and the portion.
9. The method of claim 8, wherein varying includes changing an output of the switching device to which at least one input to the switching device is connected.
10. The method of claim 8, wherein the machine being monitored is a turbine.
11. The method of claim 8, wherein the plurality of monitoring devices are selected from: linear variable differential transformers (LVDTs) and rotary variable differential transformers.
12. The method of claim 8, wherein the portion is a flow control valve, the first position is a fully closed position and the second position is a fully open position.
13. The method of claim 8, wherein the component is current or voltage.