In order to improve the higher rate of OLED-on-Silicon Microdisplay, this paper proposes a high-efficient operator strategy, which is based on the cancel of waiting time. The theory structure of high-efficient operator is proposed through the relationship between sub-field sequences and bit sequence for different gray levels. This operator is tested using the IP core and self-built HD OLED micro-display system. The experiment shows that the high-efficient operator can obtain excellent scan utilization under idle condition, compared with the traditional scan methods.