Browse > Article
http://dx.doi.org/10.13067/JKIECS.2013.8.2.207

A Voltage Programming AMOLED Pixel Circuit Compensating Threshold Voltage Variation of n-channel Poly-Si TFTs  

Chung, Hoon-Ju (금오공과대학교 전자공학부)
Publication Information
The Journal of the Korea institute of electronic communication sciences / v.8, no.2, 2013 , pp. 207-212 More about this Journal
Abstract
A novel pixel circuit that uses only n-type low-temperature polycrystalline silicon (poly-Si) thin-film transistors (LTPS-TFTs) to compensate the threshold voltage variation of a OLED driving TFT is proposed. The proposed 6T1C pixel circuit consists of 5 switching TFTs, 1 OLED driving TFT and 1 capacitor. When the threshold voltage of driving TFT varies by ${\pm}0.33$ V, Smartspice simulation results show that the maximum error rate of OLED current is 7.05 % and the error rate of anode voltage of OLED is 0.07 % at Vdata = 5.75 V. Thus, the proposed 6T1C pixel circuit can realize uniform output current with high immunity to the threshold voltage variation of poly-Si TFT.
Keywords
AMOLED; Voltage programming pixel circuit; n-channel Poly-Si TFT; Threshold voltage variation;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
연도 인용수 순위
1 김인경, 박원준, "디지털 융합미디어에 대한 수용자 인지가 사용의도에 미치는 영향", 한국전자통신학회논문지, 6권, 3호, pp. 363-369, 2011.
2 조승일, 김종찬, 반경진, 김응곤, "깊이지도를 이용한 3D 파노라마 생성에 관한 연구", 한국전자통신학회논문지, 6권, 6호, pp. 831-838, 2011.
3 이붕주, "공정압력 및 기판바이어스 인가유무에 따른 PMMA 플라즈마중합박막의 전기적 특성", 한국전자통신학회논문지, 6권, 5호, pp. 697-702, 2011.
4 Soon-Kwang Hong, Du-Hwan Oh, Seok-Hee Jeong, Young-Ju Park, Byeong-Koo Kim, Yong-Min Ha, and Jin Jang, "Source Driver Channel Reduction Schemes Employing Corresponding Pixel Alignments for Current Programming Active-Matrix Organic Light-Emitting Diode Displays", Japanese Journal of Applied Physics, Vol. 47, No. 3, pp. 1901-1905, 2008.   DOI
5 James L. Sanford and Frank R. Libsch, "TFT AMOLED pixel circuits and driving methods", SID 03 Digest, pp. 10-13, 2003.
6 Y. He, R. Hattori, and J. Kanicki, "Current- Source a.Si:H Thin-Film Transistor Circuit for Active-Matrix Organic Light-Emitting Displays", IEEE ELECTRON DEVICE LETTERS, Vol. 21, No. 12, pp. 590-592, 2000.   DOI   ScienceOn
7 김범준, "사용자 위주 IPTV 서비스 품질 측정 소프트웨어 개발", 한국전자통신학회논문지, 5권, 3호, pp. 269-274, 2010.
8 나성훈, 신현식, "고품질의 IPTV 서비스를 위한 주요기술에 대한 고찰", 한국전자통신학회논문지, 4권, 4호, pp. 253-258, 2009.
9 Tohru Saitoh, Tomohiko Oda, Arinobu Kanegae, Yoshiharu Hidaka and Kazunori Komori, "Backplane Process Technology for AMOLEDs with Bottom-Gate TFTs and Laser Annealing", SID 2012 Digest, pp. 191-194, 2012.
10 Toru Tanabe, Seiko Amano, Hiroyuki Miyake, Akio Suzuki, Ryu Komatsu, Jun Koyama, Shunpei Yamazaki, Kenichi Okazaki, Masahiro Katayama, Hiroshi Matsukizono, Yohsuke Kanhhzaki and Takuya Matsuo, "New Threshold Voltage Compensation Pixel Circuits in 13.5-inch Quad Full High Definition OLED Display of Crystalline In-Ga-Zn-Oxide FETs", SID 2012 Digest, pp. 88-91, 2012.
11 C. L. Fan, Y. Y. Lin, B. S. Lin, J. Y. Chang, C. L. Fan and H. C. Chang, "New Pixel Circuit Compensating Poly-si TFT Thresholdvoltage Shift for a Driving AMOLED", Journal of the Korean Physical Society, Vol. 56, No. 4, pp. 1185-1189, 2010.   DOI   ScienceOn