Browse > Article
http://dx.doi.org/10.7471/ikeee.2020.24.3.719

A Threshold-voltage Sensing Circuit using Single-ended SAR ADC for AMOLED Pixel  

Son, Jisu (Silicon Works Inc.)
Jang, Young-Chan (School of Electronic Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of IKEEE / v.24, no.3, 2020 , pp. 719-726 More about this Journal
Abstract
A threshold-voltage sensing circuit is proposed to compensate for pixel aging in active matrix organic light-emitting diodes. The proposed threshold-voltage sensing circuit consists of sample-hold (S/H) circuits and a single-ended successive approximation register (SAR) analog-to-digital converter (ADC) with a resolution of 10 bits. To remove a scale down converter of each S/H circuit and a voltage gain amplifier with a signl-to-differentail converter, the middle reference voltage calibration and input range calibration for the single-ended SAR ADC are performed in the capacitor digital-to-analog converter and reference driver. The proposed threshold-voltage sensing circuit is designed by using a 180-nm CMOS process with a supply voltage of 1.8 V. The ENOB and power consimption of the single-ended SAR ADC are 9.425 bit and 2.83 mW, respectively.
Keywords
successive approximation register; analog-to-digital converter; sample-hold circuit; reference calibration; input range calibration;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 A. Nathan, A. Kumar, K. Sakariya, P. Servati, S. Sambandan, and D. Striakhilev, "Amorphous silicon thin film transistor circuit integration for organic LED displays on glass and plastic," IEEE J. Solid-State Circuits, vol.39, no.9, pp. 1477-1486, 2004. DOI: 10.1109/JSSC.2004.829373   DOI
2 H.-J. In and O.-K. Kwon, "External compensation of nonuniform electrical characteristics of thin-film transistors and degradation of OLED devices in AMOLED displays," IEEE Electron. Device Lett., vol.30, no.4, pp.377-379, 2009. DOI: 10.1109/LED.2009.2014885   DOI
3 J-H. Kim, H.-W. Lee, K.-J. Min, and Y.-J. Son, "Threshold voltage sensing circuit of organic light-emitting diode display device," US Patent 9,620,053 B2, 2017.
4 J. S. Son, Jang, Young-chan, "A Threshold-Voltage Sensing Circuit using Single-ended SAR ADC for AMOLED Pixel," The Institute of Electronics and Information Engineers Conference, pp.4-6, 2016.
5 Y. Zhu, C. H. Chan, and U. F. Chio "A 10-bit 100-MS/s Reference-Free SAR ADC in 90 nm CMOS," IEEE J. Solid-State circuits, vol.45, no.6, pp.1111-1121, 2010. DOI: 10.1109/JSSC.2010.2048498   DOI
6 J. Son, H.-Y. Lee, Y.-W. Kim, Y.-C. Jang, "A 10-bit 10-MS/s SAR ADC with a Reference Driver," J. Korea Inst. Inf. Commun. Eng., vol. 20, no.12, pp. 2317-2325, 2016. DOI: 10.6109/jkiice.2016.20.12.2317   DOI