Patent ID: 9307604
Filing Date: 2016-04-05
CPC Classification: H05B

Claim Text:
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.