A Column-Parallel On-Programming Pixel-Current Readout Embedded in an OLED Display Driver IC

IF 4.6 1区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Journal of Solid-state Circuits Pub Date : 2025-02-14 DOI:10.1109/JSSC.2025.3538075

Gyu-Wan Lim;Dong-Kyu Kim;Gyeong-Gu Kang;Seunghwa Shin;Kihyun Kim;Yousung Park;Won Kim;Young-Bok Kim;Hyun-Kyu Jeon;Hyun-Sik Kim

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引用次数: 0

Abstract

This article presents an organic light-emitting diode (OLED) driver IC that embeds a column-parallel real-time pixel-current readout circuit for sensing current during actual display operation. It features a folding integrator (FI) for high sensitivity and wide dynamic range (DR) in current sensing, along with a source-driven pixel and an AFE-combined voltage driver (ACD) to facilitate current sensing during display data programming. A channel-shared common-mode noise rejection filter (CMRF) is also presented to effectively suppress channel-common panel noise. The 16-channel prototype chip was fabricated using a 180-nm CMOS process. Measurement results show that the FI achieves 80-mV/nA sensitivity and a 16-fold DR extension, while the CMRF offers up to 63 dB of noise rejection. The 11-bit current readout exhibits a maximum differential nonlinearity (DNL) of 0.33 LSB, an integral nonlinearity (INL) of 1.7 LSB, an rms noise of 1.98 digital number (DN), and a signal-to-noise ratio (SNR) of 60.3 dB. Real demonstrations with LED also validate the pixel-current sensing functionality and performance of the proposed chip.

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来源期刊

IEEE Journal of Solid-state Circuits 工程技术-工程：电子与电气

CiteScore

11.00

自引率

20.40%

发文量

351

审稿时长

3-6 weeks

期刊介绍： The IEEE Journal of Solid-State Circuits publishes papers each month in the broad area of solid-state circuits with particular emphasis on transistor-level design of integrated circuits. It also provides coverage of topics such as circuits modeling, technology, systems design, layout, and testing that relate directly to IC design. Integrated circuits and VLSI are of principal interest; material related to discrete circuit design is seldom published. Experimental verification is strongly encouraged.