Abstract
The demand for OLED displays has seen a significant rise to the extent that its driver ICs experienced shortages during the pandemic era. One factor limiting the production capacity of display driver IC (DDI) is the reliability issue associated with the spatial and temporal variations of the pixels [1] (also called “mura”). To address this problem, a common practice is to perform demura, which refers to automated inspection and pixel-wise adjustments for overall uniform appearance (Fig. 1). Conventional driver IC solutions combine on-chip SRAM with off-chip NOR Flash to store the demura data. In this work, we demonstrated the world’s first AMOLED DDI integrated with embedded RRAM for demura data storage and processing, which offers advantages in terms of performance, cost and power efficiency. A novel dual-interface-switching RRAM technology based on HfO2 is tailored for this application, offering high density and high retention (>125℃/10 years) for the DDI embedded with RRAM IP which is implemented on a commercial 40nm High-Voltage (HV) CMOS platform.
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