90‐1: A New Design of AMOLED Screen with Multi‐Frequency‐Display and Compensation Methods

In this paper, we designed a new circuit and verified the driving method of MFD (Multi‐Frequency‐Display), which can support different refresh rates in different parts of the display panel (later described as zonal refreshing). The boundary of different parts can be freely customized, and the refresh rates range from 1 to 120Hz. At the same time, to improve the issues of flicker in the low‐refresh‐rate area and brightness differences between high and low refresh rate areas after zonal refreshing, we optimized the performance of MFD through voltage compensation. The final compensated effect shows no visible flicker in the low‐refresh‐rate area, and the boundaries between high‐refresh‐rate and low‐refresh‐rate areas are almost invisible to the naked eye. Meanwhile, we also tested the objective values of flicker after compensation and the power consumption benefits under different zoning modes. We believe that in the future, refresh rates could be flexibly adjusted according to the content, enabling longer battery life but also ensuring good display quality.