Dimmable LED lamp and dimming method
First Claim
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1. A dimmable light emitting diode (LED) lamp, comprising:
- an alternating current (AC) input unit;
at least one AC detection unit connected to the AC input unit;
at least one LED driving and power supply unit;
at least one LED light source assembly, wherein the LED driving and power supply unit is connected to the LED light source assembly; and
at least one controller with a pulse width modulation (PWM) output signal,wherein;
the AC detection unit is connected to the controller;
the controller is connected to the LED driving and power supply unit;
the AC detection unit is configured to detect a switch-status of a switch and an AC input power-off status;
the controller is configured to store the switch-status every time the switch is turned on or turned off, and a brightness level status setting value for each corresponding switch-status;
when the switch is turned on, the dimmable LED lamp automatically and continuously increases or decreases a brightness level within a given time period;
if the switch stays on during the given time period, after the given time period has passed, the dimmable LED lamp maintains the brightness level reached at an end of the given time period; and
if the switch is turned off during the given time period, the controller records the brightness level of the dimmable LED lamp, and when the switch is turned on again afterwards, the brightness of the dimmable LED lamp is maintained at the level when the switch was turned off last time.
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Abstract
A dimmable light emitting diode (LED) lamp is provided. The dimmable LED lamp includes an alternating current (AC) input unit and at least one AC detection unit connected to the AC input unit. The dimmable LED lamp also includes at least one LED driving and power supply unit and at least one LED light source assembly, where the LED driving and power supply unit is connected to the LED light source assembly. Further, the dimmable LED lamp includes at least one controller with a pulse width modulation (PWM) output, wherein the AC detection unit is connected to the controller, and the controller is connected to the LED driving and power supply unit.
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Citations
16 Claims
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1. A dimmable light emitting diode (LED) lamp, comprising:
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an alternating current (AC) input unit; at least one AC detection unit connected to the AC input unit; at least one LED driving and power supply unit; at least one LED light source assembly, wherein the LED driving and power supply unit is connected to the LED light source assembly; and at least one controller with a pulse width modulation (PWM) output signal, wherein; the AC detection unit is connected to the controller; the controller is connected to the LED driving and power supply unit; the AC detection unit is configured to detect a switch-status of a switch and an AC input power-off status; the controller is configured to store the switch-status every time the switch is turned on or turned off, and a brightness level status setting value for each corresponding switch-status; when the switch is turned on, the dimmable LED lamp automatically and continuously increases or decreases a brightness level within a given time period; if the switch stays on during the given time period, after the given time period has passed, the dimmable LED lamp maintains the brightness level reached at an end of the given time period; and if the switch is turned off during the given time period, the controller records the brightness level of the dimmable LED lamp, and when the switch is turned on again afterwards, the brightness of the dimmable LED lamp is maintained at the level when the switch was turned off last time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for dimming a dimmable LED lamp, comprising:
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turning on a switch of the dimmable LED lamp; detecting a status of an AC input, wherein the status of the AC input includes a power-on status and a power-off status; increasing or decreasing automatically and continuously a brightness level within a given time period; detecting whether the switch is turned off within the given time period; when the switch is not turned off within the given time period, maintaining the brightness at the level when a dimming process is completed; when the switch is turned off within the given time period, recording the brightness level when the dimmable LED lamp is turned off; turning on the switch again; and maintaining the brightness at the level when the dimmable LED lamp is turned off last time. - View Dependent Claims (10, 11, 12, 13)
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14. A dimmable light emitting diode (LED) lamp, comprising:
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an alternating current (AC) input unit; one AC detection unit connected to the AC input unit; one LED driving and power supply unit; one LED light source assembly, wherein the LED driving and power supply unit is connected to the LED light source assembly; and one controller with a pulse width modulation (PWM) output signal, wherein; the AC detection unit is connected to the controller; the controller is connected to the LED driving and power supply unit; the AC detection unit is configured to detect a switch-status of a switch and an AC input power-off status; and the controller is configured to store the switch-status every time the switch is turned on or turned off, and a brightness status setting value for each corresponding switch-status; when the switch is turned on, the dimmable LED lamp automatically and continuously increases or decreases a brightness level within a given time period; if the switch stays on during the given time period, after the given time period has passed, the dimmable LED lamp maintains the brightness level reached at an end of the given time period; and if the switch is turned off during the given time period, the controller records the brightness level of the dimmable LED lamp, and when the switch is turned on again afterwards, the brightness of the dimmable LED lamp is maintained at the level when the switch was turned off last time. - View Dependent Claims (15, 16)
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Specification