New Current-Programmed Active-Matrix Organic Light-Emitting Diode Pixel Circuit

ZHOU Lei; ZHANG Li-rong; SONG Xiao-feng; WU Wei-jing; YAO Ruo-he

doi:10.3788/YJYXS20132803.0386

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New Current-Programmed Active-Matrix Organic Light-Emitting Diode Pixel Circuit

Driving & Controlling | 更新时间：2020-08-12

- New Current-Programmed Active-Matrix Organic Light-Emitting Diode Pixel Circuit
- Chinese Journal of Liquid Crystals and Displays Vol. 28, Issue 3, Pages: 386-391(2013)
- 作者机构：
  
  1. 华南理工大学电子与信息学院,广东广州,510640
  2. 华南理工大学发光材料与器件国家重点实验室,广东广州,510641
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20132803.0386
  CLC： TN27
- Received：19 January 2013，
  
  Revised：28 February 2013，
  
  Published Online：22 March 2013，
  
  Published：15 June 2013
- 稿件说明：
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周雷, 张立荣, 宋小锋, 吴为敬, 姚若河. 新型有源矩阵有机发光显示电流编程像素电路[J]. 液晶与显示, 2013,28(3): 386-391

ZHOU Lei, ZHANG Li-rong, SONG Xiao-feng, WU Wei-jing, YAO Ruo-he. New Current-Programmed Active-Matrix Organic Light-Emitting Diode Pixel Circuit[J]. , 2013,28(3): 386-391
周雷, 张立荣, 宋小锋, 吴为敬, 姚若河. 新型有源矩阵有机发光显示电流编程像素电路[J]. 液晶与显示, 2013,28(3): 386-391 DOI： 10.3788/YJYXS20132803.0386.

ZHOU Lei, ZHANG Li-rong, SONG Xiao-feng, WU Wei-jing, YAO Ruo-he. New Current-Programmed Active-Matrix Organic Light-Emitting Diode Pixel Circuit[J]. , 2013,28(3): 386-391 DOI： 10.3788/YJYXS20132803.0386.

摘要

提出了一种新型有源矩阵有机发光显示用电流编程型像素驱动电路。该像素电路由3个开关薄膜晶体管、一个驱动薄膜晶体管、一个存储电容和两条控制线构成。仿真结果表明

该4T1C像素电路可以补偿薄膜晶体管阈值电压的非均匀性以及有机发光二极管阈值电压的漂移

发光电流的平均非均匀性为4.63% 。值得指出的是

同传统的电流编程型像素电路相比

本像素电路存储电容的接法可有效提高电路响应速度。此外

还分析了寄生电容对像素电路工作的影响。

Abstract

A new current-programmed pixel circuit for active-matrix organic light-emitting diode (AMOLED) displays is presented. The pixel circuit consists of three switching thin-film transistors (TFTs)

one driving TFT

one capacitor and two control lines . Simulation results show that the pixel circuit can effectively compensate for the nonuniformity of the TFT threshold voltage and the shift of OLED threshold voltage. And the average nonuniformity of the emitting current is 4.63%. Compared with the traditional current-programmed pixel circuits

the connection mode of the capacitor in the pixel circuit makes the circuit works faster.Furthermore

the influence caused by the parasitic capacitor in the pixel circuit is analysed.

关键词

Keywords

references

Dawson R, Shen Z, Furst D A, et al. The impact of the transient response of organic light emitting diodes on the design of active matrix OLED displays[C]//IEDM Tech. Dig., San Francisco, CA: IEEE, 1998: 875-878.[2] Lee J H, Nam W J, Jung S H, et al. A new current scaling pixel circuit for AMOLED [J]. IEEE Electron Device Lett.,2004,25(5):280-282.[3] Lin Y C, Shieh H P, Kanicki J. A novel current-scaling a-Si H TFTs pixel electrode circuit for AM-OLEDs [J]. IEEE Transactions on Electron Devices, 2005, 52(6):1123-1131.[4] Servati P, Nathan A. Functional pixel circuits for elastic AMOLED displays [J]. Proceedings of IEEE, 2005,93(7):1257-1264.[5] 张彤,郭小军,赵毅,等. a-Si TFT OLED 有源驱动阵列参数的优化与布局设计 [J]. 液晶与显示, 2003, 18( 5):332-337.[6] 郭英英,李荣玉,梁宝闻,等. AM-OLED 四管像素驱动电路特性研究 [J]. 液晶与显示 , 2008,23(6):667-670.[7] 尹盛, 江博, 李喜峰. 17.8 cm彩色AMOLED驱动模块的研制 [J]. 液晶与显示, 2012,27(3):347-351.[8] 李国强,章坚武,占志伟. AMOLED驱动电路和LINUX下驱动程序设计 [J]. 液晶与显示, 2011,26(4):527-531.[9] 詹润泽,谢汉萍,董承远.采用不同透明电极的非晶铟镓锌氧化物薄膜晶体管 [J]. 液晶与显示, 2013,28(1):55-58.[10] Lee J H, Kim J H,Han M K. A new a-Si:H TFT pixel circuit compensating the threshold voltage shift of a-Si:H TFT and OLED for active matrix OLED [J]. IEEE Electron Device Lett., 2005, 26(12):897-899.[11] Wu W J, Zhou L, Yao R H, et al.A New Voltage-Programmed Pixel Circuit for Enhancing the Uniformity of AMOLED Displays [J]. IEEE Electron Device Lett.,2011, 32(7):931-933.[12] Nathan A, Kumar A, Sakariya K,et al. Amorphous silicon thin film transistor circuit integration for organic LED displays on glass and plastic [J]. IEEE J. Solid-State Circuits, 2004, 39(9):1477-1486.[13] He Y, Hattori R, Kanicki J. Improved a-Si H TFT pixel electrode circuits for active matrix organic light emitting displays [J]. IEEE Tran actions on Electron Devices, 2001, 48(7): 1322-1325.

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