An a-IGZO TFT Pixel Circuit with Improved Current Mirror for Active Matrix Organic Light Emitting Diode Displays

被引：0

作者：

Liu, Lilin ^{[1
]}

Sun, Kun ^{[1
]}

Zhang, Xiangying

Teng, Dongdong ^{[2
]}

Wang, Gang ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Elect & Informat Engn, State Key Lab Optoelect Mat & Technol, Guangzhou, Guangdong, Peoples R China

[2] Sun Yat Sen Univ, Sch Phys, Guangzhou, Guangdong, Peoples R China

来源：

2016 17TH INTERNATIONAL CONFERENCE ON ELECTRONIC PACKAGING TECHNOLOGY (ICEPT) | 2016年

关键词：

Active matrix organic light emitting diode (AMOLED); amorphous indium-gallium-zinc oxide (a-IGZO); thin-film transistor (TFT); current programmed pixel circuit (CPPC); channel length modulation effect; THRESHOLD-VOLTAGE;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Active matrix organic light emitting diode (AMOLED) displays based on amorphous indium-gallium-zinc oxide thin-film transistor (a-IGZO TFT) pixel circuit encounter problems as instability of threshold voltage (VT) under gate voltage bias-stress, the non-uniformity of mobility (11) resulting from the large area TFT scale fabrication, and OLED degradation, etc. In this paper, we proposed a current compensation method. An improved current mirror is designed to overcome the channel length modulation effect of TFTs. The SPICE simulation results show that the proposed scheme not only effectively compensates for non-uniformity related with deviations of VT and 11 in a-IGZO TFTs, the OLED degradation, but also guarantees a good linearity between IDATA and IOLED.

引用

页码：1235 / 1239

页数：5

共 17 条

[1] A Driving Scheme for Active-Matrix Organic Light-Emitting Diode Displays Based on Current Feedback [J].

Ashtiani, Shahin J. ;

Nathan, Arokia .

JOURNAL OF DISPLAY TECHNOLOGY, 2009, 5 (07) :257-264

[2] A 3-TFT current-programmed pixel circuit for AMOLEDs [J].

Ashtiani, SJ ;

Servati, P ;

Striakhilev, D ;

Nathan, A .

IEEE TRANSACTIONS ON ELECTRON DEVICES, 2005, 52 (07) :1514-1518

[3] A Fast Settling Current Driver Based on the CCII for AMOLED Displays [J].

Chaji, G. Reza ;

Nathan, Arokia .

JOURNAL OF DISPLAY TECHNOLOGY, 2005, 1 (02) :283-288

[4]

Chih-Lung L., 2013, ELECT DEVICE LETT IE, V34, P1166

[5]

Chuanli L., 2012, SOL STAT INT CIRC TE, P1

[6] Design of flat-panel displays based on organic light-emitting devices [J].

Gu, G ;

Forrest, SR .

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, 1998, 4 (01) :83-99

[7] Does TFT mobility impact pixel size in AMOLED backplanes? [J].

Kumar, A ;

Nathan, A ;

Jabbour, GE .

IEEE TRANSACTIONS ON ELECTRON DEVICES, 2005, 52 (11) :2386-2394

[8]

Li C. C., 1993, International Electron Devices Meeting 1993. Technical Digest (Cat. No.93CH3361-3), P497, DOI 10.1109/IEDM.1993.347302

[9] Mirrored OLED pixel circuit for threshold voltage and mobility compensation with IGZO TFTs [J].

Liao, C. ;

Deng, W. ;

Song, D. ;

Huang, S. ;

Deng, L. .

MICROELECTRONICS JOURNAL, 2015, 46 (10) :923-927

[10] A novel LTPS-TFT pixel circuit compensating for TFT threshold-voltage shift and OLED degradation for AMOLED [J].

Lin, Chih-Lung ;

Chen, Yung-Chih .

IEEE ELECTRON DEVICE LETTERS, 2007, 28 (02) :129-131

← 1 2 →