2022•SID Symposium Digest of Technical PapersRequires access

P‐16: Student Poster: New a‐IGZO TFT Pixel Circuit Compensating Threshold Voltage and Mobility for Active‐Matrix OLED with Source Follower Method

Ji‐Hwan Park, Kyeong‐Soo Kang, Jimin Kang, Soo‐Yeon Lee

Abstract

This paper proposes a new amorphous indium gallium zinc oxide (a‐IGZO) pixel circuit for the simultaneous emission active‐matrix organic light‐emitting diode (AMOLED) displays, which can compensate for the non‐uniform threshold voltage (V TH ) and mobility (μ) of the thin‐film transistor (TFT). The Negative V TH are successfully compensated by adopting the source follower method, and then mobility compensation is carried out by additional voltage adjustment. The OLED current error rate is within 9 % against the V TH and mobility variations in the simulation.

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Key concepts: AMOLED, Thin-film transistor, Active matrix, OLED, Materials science, Threshold voltage, Optoelectronics, Compensation (psychology)