A Dynamic Compensated and 95% High-Efficiency Supply Buffer in RGB Virtual Pixel MicroLED Display for Reducing Ghosting by 73% and Achieving Four Times Screen Resolution

Abstract

This article proposed micro light emitting diode (microLED) virtual pixel array design and driver. The proposed virtual pixel array effectively increases the pixels per inch and reduces parasitic capacitance for alleviating ghosting effects. The push-pull supply buffer in the proposed driver is compensated by the dynamic Miller compensation technique to achieve fast transient response and reduce the ghosting by 50%-73%. Four times screen resolution can be obtained compared to conventional designs. A 95% high-efficiency microLED driver has the lowest 45 μW power consumption. The proposed supply buffer can drive microLEDs in 51-inch display panel, which is composed of 214 small 96 × 64 microLED panels for automotive display.