Patent ID: 9155149
Filing Date: 2015-10-06
Classification: H05B

Abstract:
1. An LED lamp with a self-adaptive drive circuit, the LED lamp comprising: a plurality of series-connected LED lamp strings, wherein each LED lamp string comprises a plurality of series LED lamp beads; and a self-adaptive drive circuit in communication with the plurality of LED lamp strings, the self-adaptive drive circuit comprising wherein each controllable switch unit selectively connects a different one of the series-connected LED lamp strings to ground, a distal one of the LED lamp strings being connected directly to ground; wherein the VDCC unit includes a plurality of comparators configured to compare the drive voltage to a plurality of reference voltages defining a plurality of voltage ranges, thereby determining the voltage range of the drive voltage, a first one of the plurality of comparators being in communication with a first voltage, a second voltage, and the drive voltage; and wherein each of the controllable switch units is associated with one of the voltage ranges, the VDCC unit further configured to disconnect any controllable switch unit not associated with the determined voltage range, and to connect any controllable switch unit associated with the determined voltage range, such that no more than one controllable switch unit is connected in series with the LED lamp strings at any time.