Patent ID: 6501228
Filing Date: 2002-12-31
Classification: H05B,Y02B,Y10S

Abstract:
An electroluminescent lamp device, comprising a charge pumping circuit at a first end of at least one electroluminescent element, said charge pumping circuit including two half-wave driving circuits which together form a full wave driving circuit, each half-wave driving circuit including a transistor, a diode, a switch, said at least one electroluminescent element, and a shared coil connected in series between respective said transistors, and said electroluminescent device further comprising a transistor switch connected to a second end of the at least one electroluminescent element, wherein a low voltage DC signal is converted to a high voltage AC signal for causing illumination of the at least one electroluminescent element through the charge pumping circuit, and wherein brightness is regulated by the transistor switch at the second end of the electroluminescent element.