| 主权项 |
1. A driver circuit for an OLED (organic light-emitting diode) panel load having a first terminal and a second terminal, said driver circuit comprising:
a source of input DC power supply connected to a first node and further connected to the first terminal of the load; a first Inverting Buck-Boost Converter (IBBC) adapted to receive the input DC voltage and provide a regulated DC output voltage, a negative voltage, to drive the load, said first IBBC comprising:
a first switch coupled between the first node and a second node;an inductor coupled between the second node and a system ground;a second switch coupled between the second node and the second terminal of the load; anda first capacitor coupled between the first terminal and the second terminal of the load; a first control circuit coupled to said first IBBC, said first control circuit adapted to control switching times of the first switch and the second switch; and a second DC-DC converter comprising a second capacitor and an associated second control circuit, said second DC-DC converter adapted to generate a reference ground for said first control circuit and said second control circuit and further adapted to generate a positive voltage across the second capacitor. |
