Abstract
In this paper, we investigate the mechanism of low efficacy of a 200-μm-gap structure in a high driving frequency and suggest a new driving waveform for improving the efficacy. The detailed role of the address electrode during the surface discharge is discussed by measuring the discharge current flowing to each electrode. Our observation reveals that the current flowing to the address electrode increases with driving frequency and it makes the surface discharge be weakened. A new sustain waveform with the floating time has been suggested which can enhance the surface discharge by suppressing the opposite discharge. As a result of adopting the proposed sustain waveform, the luminous efficacy has been improved to around 30% compared with the conventional sustain waveform at the driving frequency of 200 kHz.
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