| 摘要 |
An apparatus and method for driving a lamp structure (301) are provided. In one embodiment, an inverter having four switching elements is split into two inverter arms (302), (304) that are deployed at separate terminals (312), (314) of the lamp structure (301) to achieve even light output. A controller (306) drives both inverter arms (302), (304) such that power switching lines do not cross the lamp structure (301). In one embodiment, the controller (306) adjusts the brightness of the lamp structure (301) by adjusting the phase difference between outputs of the first inverter arm (302) relative to the second inverter arm (304). In one embodiment, the controller (306) adjusts the brightness by symmetrically pulse width modulating the outputs of the first inverter arm (302) and the second inverter arm (304). |
