有源矩阵有机发光二极管显示驱动架构的演变

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关键词：AMOLED像素驱动电路;阈值电压补偿;LTPO技术;一次锁存（OTD）架构;动态功耗 中图分类号：TN27;TN321+.5文献标识码：Adoi：10.37188/CJLCD.2025-0151CSTR：32172.14.CJLCD.2025-0151

Abstract：Active-matrix organic light-emitting diode（AMOLED） display technology has become a mainstream solution in next-generation displays due to its high contrast ratio，rapid response，and flexibility.The pixel driving architecture critically determines display quality and energy eficiency.This paper systematically reviews the technical evolution of AMOLED pixel driving circuits： From the early simplified 2TiC architecture to the pipelined compensation architectures（e.g.，6TiC/7TiC） enabling realtime internal compensation of threshold voltage（ Vth ）；Further advancing to LTPO wide-frequency driving architectures，which leverage hybrid low-temperature polycrystaline silicon and oxide （LTPS & Oxide） TFTbackplane technology to support adaptive refresh rate adjustment '（ 1～120Hz ），significantly reducing dynamic power consumption； And innovating with the One-Time Driving（OTD） architecture， which adopts nonvolatile memory and in-memory computing design. This approach decouples Vth latching from data refreshing，reducing the compensation frequency to 1/N of the data refresh rate（e.g.， N=20 ， compensating Vth once per 2O frames），thereby slashing dynamic power consumption by 56% at high refresh rates. The paper thoroughly analyzes circuit principles， timing diagram，and power models of these architectures.It highlights that the integration of high-mobility rare-earth-doped oxide TFTs（e.g.， Ln-IZO） with the OTD architecture will pave a new technical path for low-cost，low-power AMOLED displays.

Keywords： AMOLED pixel driving circuit；threshold voltage compensation；LTPO technology；one-time driving（OTD） architecture;dynamic power consumption

1引言

有源矩阵有机发光二极管（AMOLED）作为全固态显示技术，凭借其高对比度、快速响应、柔性可折叠及广色域等特性，已成为新型显示领域的主流技术之一[1-3] 。（剩余15574字）