Atomized Scan Method for High-Definition Silicon-Based OLED Microdisplays

摘要

Silicon-based organic light-emitting diode (OLED) microdisplays are widely used in the head-mounted devices. This article proposes a novel atomized scan method for the digital driving silicon-based OLED microdisplays. By eliminating the time redundancy in the digital driving, the proposed method generates the high transmission efficiency, high lighting efficiency, high grayscale efficiency, and good linearity compared with the traditional pulsewidth modulation (PWM) scan methods. Four scan characteristics of the high-efficiency scan sequence are analyzed. The high efficient atomized scan can be obtained by implanting the low grayscale scan into the high grayscale scan. A 1.6 k x 1.6 k full color silicon-based OLED microdisplay, together with the hardware driving platform, is designed and implemented to verify the proposed atomized scan method. By measuring the brightness values of 256 gray levels, the atomized scan method with the blank operation can achieve high scan efficiency with the low clock frequency (57.6 MHz).