| 摘要 |
A serial resonant circuit, formed by EL panel (CEL) and coil (L1), is connected to a push-pull driver through a positive feedback path to form an oscillator circuit. The EL panel is driven by a sinusoidal driving signal to emit light. The voltage level of the EL panel driving signal is adjusted corresponding to the change in the capacitance of the EL panel so that the luminous brightness of the EL panel can be maintained on a constant level.
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