Patent ID: 9380666
Filing Date: 2016-06-28
CPC Classification: H05B,Y02B

Claim Text:
1. A light emitting diode (LED) driving device to drive a LED device which is composed by a plurality of LED modules connected in series, the LED device being coupled to a driving voltage source, the LED driving device comprising: a multi-segment linear LED driver, coupled to the LED modules, selectively providing a first path to a first LED module of the LED modules for flowing a first constant current, or providing a second path to the first LED module and a second LED module of the LED modules for flowing a second constant current; a first current-compensating device being connected to the second module in parallel, wherein when the first path is provided, the first current-compensating device conducts a first compensating current, and when the second path is provided, the first current-compensating device stops conducting the first compensating current; and a second current-compensating device coupled to the second LED module, wherein when the second path is provided, a second compensating current flows through the second current-compensating device conducts a second compensating current.