| 摘要 |
<p>A circuit for powering an electroluminescent panel used, for example, for backlighting a liquid crystal display in a portable computer; comprises a self commutating series resonant switch circuit using, as the resonant components, the panel (30) and an inductor (22) in series. During the first half of each resonant period, a first latch circuit senses, and conducts current drawn from a supply through the resonant circuit in a first direction. During the second half of each resonant period, a second latch circuit senses current from the resonant circuit in the opposite direction, and is operationally connected across the resonant circuit to conduct this current.</p> |
