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Pixel structures using the negative feedback method for high-resolution active matrix organic light-emitting diode displays

Title
Pixel structures using the negative feedback method for high-resolution active matrix organic light-emitting diode displays
Author
권오경
Keywords
negative feedback method; high-resolution displays; AMOLED pixel
Issue Date
2013-12
Publisher
WILEY-BLACKWELL, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Citation
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY, 권: 21, 호: 12, 페이지: 505-510
Abstract
Novel two pixel structures are proposed for high-resolution active matrix organic light-emitting diode displays. The proposed two pixels (pixel structures A and B) use the negative feedback method for high-resolution displays that requires to have small-sized storage capacitance. The proposed pixel structures A and B improve the luminance uniformity by reducing the voltage distortion in the storage capacitor. However, the proposed pixel structure A is vulnerable to the organic light-emitting diode (OLED) degradation because the anode voltage of the OLED affects the emission current. In order to compensate the OLED degradation, the proposed pixel structure B stores the turn-on voltage of OLEDs in the storage capacitor. The simulation results show that the emission current error of the proposed pixel structure B is improved by four times in comparison with the proposed pixel structure A when the OLED turn-on voltage increases by 0.1 V. Also, the emission current error of the proposed pixel structure B when the threshold voltage of driving thin-film transistors varies from -2.2 to -1.8 V is from -0.69 least significant bit (LSB) to 0.13 LSB, which shows the excellent luminance uniformity. The proposed pixels are designed for 5.5-in. full high-definition displays.
URI
https://onlinelibrary.wiley.com/doi/abs/10.1002/jsid.207
ISSN
1071-0922; 1938-3657
DOI
10.1002/jsid.207
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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