4032‐pixels per inch threshold voltage compensation pixel circuit for organic light‐emitting diode‐on‐silicon

Abstract Virtual reality (VR) headsets with pancake lenses require organic light‐emitting diode‐on‐silicon (OLEDoS) panels for higher pixel density and superior image quality. Achieving high‐quality OLEDoS panels necessitates integrating pixel compensation circuits within the limited pixel area of high‐resolution displays. However, reduced transistor count increases Vth variation, while smaller storage capacitors with higher parasitic capacitance degrade image quality. This study proposes a novel 7T1C pixel compensation circuit for 4032‐ppi OLEDoS panels operating at 8 V. The circuit minimizes the body effect in CMOS transistors by maintaining equal voltage at the source and body nodes of the driving transistor. An area‐efficient single‐capacitor design and a data‐driving method without toggling mitigate image quality degradation caused by capacitor coupling. The proposed 4032‐ppi panel enhances short‐range uniformity (SRU) from 90.4% to 97.3% and reduces horizontal cross‐talk from 2.0% to 1.3%.