IR drop-independent 8T1C LTPS pixel circuit for medium-sized AMOLED displays
OLED displays have been widely used in mobile devices due to their numerous advantages. The pixel circuits of OLED displays typically employ low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) for their high mobility and reliability. However, LTPS TFTs suffer from threshold v...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2025-04-01
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| Series: | Journal of Information Display |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/15980316.2025.2497373 |
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| author | Won-Been Jeong Su-Hyeong Kim Hoon-Ju Chung Seung-Woo Lee |
| author_facet | Won-Been Jeong Su-Hyeong Kim Hoon-Ju Chung Seung-Woo Lee |
| author_sort | Won-Been Jeong |
| collection | DOAJ |
| description | OLED displays have been widely used in mobile devices due to their numerous advantages. The pixel circuits of OLED displays typically employ low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) for their high mobility and reliability. However, LTPS TFTs suffer from threshold voltage (VTH) variation, sometimes leading to OLED current error (OCE) and non-uniform display. A diode connection method was used in the conventional OLED pixel circuit to compensate for this limitation. However, the impact of IR drop in the metal lines necessitates developing a new circuit to eliminate the adverse effect of IR drop. Accordingly, this paper proposed an 8T1C LTPS pixel circuit, featuring an additional reference voltage for VTH compensation independent of IR drop. Simulation results demonstrate that the suggested circuit effectively compensates for VTH, ensuring uniform OLED performance regardless of IR drop. This circuit design also enables consistent image quality, particularly in medium-sized displays, where IR drop would be severe, by maintaining uniform OLED current across the entire panel. |
| format | Article |
| id | doaj-art-e7062485d3884177898a00d6513547db |
| institution | DOAJ |
| issn | 1598-0316 2158-1606 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Information Display |
| spelling | doaj-art-e7062485d3884177898a00d6513547db2025-08-20T03:13:51ZengTaylor & Francis GroupJournal of Information Display1598-03162158-16062025-04-0111210.1080/15980316.2025.2497373IR drop-independent 8T1C LTPS pixel circuit for medium-sized AMOLED displaysWon-Been Jeong0Su-Hyeong Kim1Hoon-Ju Chung2Seung-Woo Lee3Department of Information Display, Kyung Hee University, Dongdaemun-gu, Republic of KoreaDepartment of Information Display, Kyung Hee University, Dongdaemun-gu, Republic of KoreaSchool of Electronic Engineering, Kumoh National Institute of Technology, Gumi, Republic of KoreaDepartment of Information Display, Kyung Hee University, Dongdaemun-gu, Republic of KoreaOLED displays have been widely used in mobile devices due to their numerous advantages. The pixel circuits of OLED displays typically employ low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) for their high mobility and reliability. However, LTPS TFTs suffer from threshold voltage (VTH) variation, sometimes leading to OLED current error (OCE) and non-uniform display. A diode connection method was used in the conventional OLED pixel circuit to compensate for this limitation. However, the impact of IR drop in the metal lines necessitates developing a new circuit to eliminate the adverse effect of IR drop. Accordingly, this paper proposed an 8T1C LTPS pixel circuit, featuring an additional reference voltage for VTH compensation independent of IR drop. Simulation results demonstrate that the suggested circuit effectively compensates for VTH, ensuring uniform OLED performance regardless of IR drop. This circuit design also enables consistent image quality, particularly in medium-sized displays, where IR drop would be severe, by maintaining uniform OLED current across the entire panel.https://www.tandfonline.com/doi/10.1080/15980316.2025.2497373Organic light emitting diode (OLED) displaypixel circuitlow-temperature poly-Si (LTPS) thin-film transistor (TFT)threshold voltageIR dropDisplay Circuits and Systems |
| spellingShingle | Won-Been Jeong Su-Hyeong Kim Hoon-Ju Chung Seung-Woo Lee IR drop-independent 8T1C LTPS pixel circuit for medium-sized AMOLED displays Journal of Information Display Organic light emitting diode (OLED) display pixel circuit low-temperature poly-Si (LTPS) thin-film transistor (TFT) threshold voltage IR drop Display Circuits and Systems |
| title | IR drop-independent 8T1C LTPS pixel circuit for medium-sized AMOLED displays |
| title_full | IR drop-independent 8T1C LTPS pixel circuit for medium-sized AMOLED displays |
| title_fullStr | IR drop-independent 8T1C LTPS pixel circuit for medium-sized AMOLED displays |
| title_full_unstemmed | IR drop-independent 8T1C LTPS pixel circuit for medium-sized AMOLED displays |
| title_short | IR drop-independent 8T1C LTPS pixel circuit for medium-sized AMOLED displays |
| title_sort | ir drop independent 8t1c ltps pixel circuit for medium sized amoled displays |
| topic | Organic light emitting diode (OLED) display pixel circuit low-temperature poly-Si (LTPS) thin-film transistor (TFT) threshold voltage IR drop Display Circuits and Systems |
| url | https://www.tandfonline.com/doi/10.1080/15980316.2025.2497373 |
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