A Low-luminance Compensation Current Driver for AMOLED Displays

Seonwoo Yeom; Minhyun Jin; Donggun Lee; Kyujin Kim; Soo Youn Kim

doi:10.5573/JSTS.2021.21.1.068

A Low-luminance Compensation Current Driver for AMOLED Displays

Seonwoo Yeom, Minhyun Jin, Donggun Lee, Kyujin Kim, Soo Youn Kim

Division of System Semiconductor

Research output: Contribution to journal › Article › peer-review

Abstract

A Feedback Trans-conductance (FB-Gm) current-mode driver with a charge-transfer circuit is proposed to achieve ultra-low current drivability (≤ 2 nA). By using an FB-Gm current-mode driver, both threshold-voltage and mobility variations can be compensated. In addition, an initialization technique that uses a charge-transfer circuit is proposed to handle an ultra-low current of approximately 2 nA with fast driving speed. The simulation results show that the proposed current-mode driver can compensate for 2 nA of current within 10 µs of onerow time with 10 µA/channel of static-current consumption. Here, 1.5 kΩ of series resistance and 25 pF of shunt capacitance, which represent doublewide ultra XGA (DWUXGA) AMOLED displays, are used for accurate simulation.

Original language	English
Pages (from-to)	68-72
Number of pages	5
Journal	Journal of Semiconductor Technology and Science
Volume	21
Issue number	1
DOIs	https://doi.org/10.5573/JSTS.2021.21.1.068
State	Published - 2021

Keywords

Charge-transfer circuit
Feedback trans-conductance current-mode driver
Index Terms—AMOLED displays
Ultra-low compensation current

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10.5573/JSTS.2021.21.1.068

Cite this

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title = "A Low-luminance Compensation Current Driver for AMOLED Displays",

abstract = "A Feedback Trans-conductance (FB-Gm) current-mode driver with a charge-transfer circuit is proposed to achieve ultra-low current drivability (≤ 2 nA). By using an FB-Gm current-mode driver, both threshold-voltage and mobility variations can be compensated. In addition, an initialization technique that uses a charge-transfer circuit is proposed to handle an ultra-low current of approximately 2 nA with fast driving speed. The simulation results show that the proposed current-mode driver can compensate for 2 nA of current within 10 µs of onerow time with 10 µA/channel of static-current consumption. Here, 1.5 kΩ of series resistance and 25 pF of shunt capacitance, which represent doublewide ultra XGA (DWUXGA) AMOLED displays, are used for accurate simulation.",

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author = "Seonwoo Yeom and Minhyun Jin and Donggun Lee and Kyujin Kim and Kim, {Soo Youn}",

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AU - Lee, Donggun

AU - Kim, Kyujin

AU - Kim, Soo Youn

PY - 2021

Y1 - 2021

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AB - A Feedback Trans-conductance (FB-Gm) current-mode driver with a charge-transfer circuit is proposed to achieve ultra-low current drivability (≤ 2 nA). By using an FB-Gm current-mode driver, both threshold-voltage and mobility variations can be compensated. In addition, an initialization technique that uses a charge-transfer circuit is proposed to handle an ultra-low current of approximately 2 nA with fast driving speed. The simulation results show that the proposed current-mode driver can compensate for 2 nA of current within 10 µs of onerow time with 10 µA/channel of static-current consumption. Here, 1.5 kΩ of series resistance and 25 pF of shunt capacitance, which represent doublewide ultra XGA (DWUXGA) AMOLED displays, are used for accurate simulation.

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A Low-luminance Compensation Current Driver for AMOLED Displays

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