Compensation Pixel Circuit to Improve Image Quality for Mobile AMOLED Displays
| العنوان: | Compensation Pixel Circuit to Improve Image Quality for Mobile AMOLED Displays |
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| المؤلفون: | Po-Chun Lai, Lin Tsu-Yuan, Po-Cheng Lai, Tsang-Hong Wang, Kuang-Hsiang Liu, Li-Wei Shih, Chia-Che Hung, Chih-Lung Lin |
| المصدر: | IEEE Journal of Solid-State Circuits. 54:489-500 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Discrete mathematics, Physics, Pixel, Image (category theory), 020208 electrical & electronic engineering, Transistor, 02 engineering and technology, Active matrix, law.invention, AMOLED, law, Thin-film transistor, 0202 electrical engineering, electronic engineering, information engineering, OLED, Electrical and Electronic Engineering, Diode |
| الوصف: | This paper proposes a new pixel circuit using low-temperature polycrystalline silicon thin-film transistors (LTPS TFTs) for use in mobile active matrix organic light-emitting diode (AMOLED) displays. The purpose of a pixel circuit is to supply stable and uniform currents to current-driving devices of OLEDs. The proposed pixel circuit uses overlapping compensation times to extend the period of precise sensing of $V_{\mathrm {TH}}$ variations of LTPS TFTs. Moreover, the proposed circuit prevents a current from flowing into an OLED when the OLED is not operated in the emission stage to avoid image flicker. An 1.3-in panel that uses the proposed pixel circuit is fabricated. Measurement results verify that the increased $T_{\mathrm {COMP}}$ of 33.3 $\mu \text{s}$ results in higher contrast ratio and lower required data voltages than those at $T_{\mathrm {COMP}}$ values of 4.3 and 2.2 $\mu \text{s}$ . Red, green, and blue images displayed by the fabricated panel with a $T_{\mathrm {COMP}}$ of 33.3 $\mu \text{s}$ with a 255 gray level are all much more uniform than with $T_{\mathrm {COMPS}}$ of 4.3 and 2.2 $\mu \text{s}$ . White images with a $T_{\mathrm {COMP}}$ of 33.3 $\mu \text{s}$ for 16 and 8 gray levels on the fabricated panel confirm that the serious line and spot defects in the images with $T_{\mathrm {COMP}}$ values of 4.3 and 2.2 $\mu \text{s}$ are effectively eliminated. Therefore, the proposed pixel circuit is suitable for use in mobile AMOLED displays. |
| تدمد: | 1558-173X 0018-9200 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::31acb21a029dc23318a9e8ed69d8b5fe https://doi.org/10.1109/jssc.2018.2881922 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........31acb21a029dc23318a9e8ed69d8b5fe |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1558173X 00189200 |
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