[DES2-1] LTPO MicroLED Pixel Circuit for Highly Stable Driving Current with 6T1C Pulse Width Contol Circuit Structure | Proceedings of the International Display Workshops Volume 31 (IDW '24)

Proceedings of the International Display Workshops Volume 31 (IDW '24)

Dec 4 - Dec 6, 2024Sapporo Convention Center

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Proceedings of the International Display Workshops Volume 31 (IDW '24)

Dec 4 - Dec 6, 2024Sapporo Convention Center

[DES2-1]LTPO MicroLED Pixel Circuit for Highly Stable Driving Current with 6T1C Pulse Width Contol Circuit Structure

*Ji-Hwan Park¹, Kyeong-Soo Kang¹, Chanjin Park¹, Soo-Yeon Lee¹(1. Seoul National University (Korea))

https://doi.org/10.36463/idw.2024.1242

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Keywords:

low-temperature polycrystalline oxide (LTPO),thin-film transistor (TFT),micro-LED,pixel circuit

We propose a new 6T1C PWM structure-based LTPO μLED pixel circuit for uniform diving current. The proposed circuit can reduce data voltage range with 6T1C PWM structure. By compensating for falling wave-shape fluctuations, the circuit exhibits low error rate. Moreover, applying the VSWEEP to the source node of the DRT_PWM ensures that the μLED current maintains a constant peak current level.

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