[Paper] Improvement of Internal Compensation by Differential Offset Method for OLED Display Using High Mobility Oxide TFT

Yong Ho Jang; Kwang Il Chun; Younghyun Ko; Uyhyun Choi; Min-Gu Kang; Hyung Joon Koo; Seung Chan Choi; Dae Hwan Kim; Jiyong Noh; Kwon-shik Park

doi:10.3169/mta.10.152

Special Section on IDW '21

[Paper] Improvement of Internal Compensation by Differential Offset Method for OLED Display Using High Mobility Oxide TFT

Yong Ho Jang, Kwang Il Chun, Younghyun Ko, Uyhyun Choi, Min-Gu Kang, Hyung Joon Koo, Seung Chan Choi, Dae Hwan Kim, Jiyong Noh, Kwon-shik Park

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Keywords: internal compensation, differential offset method, OLED Display, oxide TFT, uniformity

JOURNAL FREE ACCESS

2022 Volume 10 Issue 4 Pages 152-158

DOI https://doi.org/10.3169/mta.10.152

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Abstract

A new internal compensation method for OLED display with high mobility oxide TFT is presented. The differential offset method was devised to make an offset voltage adapted for each pixel utilizing the behavior of the source follower type circuit. It can preemptively eliminate not only the sensing error but also V_th dependent voltage errors including after-sensing steps. Fabricated 5.5-in. QHD OLED displays have showed improved uniformity.

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