A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film Transistors

A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film Transistors

In this paper, a new pixel structure using low-temperature polycrystalline silicon and oxide (LTPO) thin-film transistors (TFTs) for low-power liquid crystal displays (LCDs) is proposed. The extremely low off-state current of oxide semiconductor TFTs enables the proposed circuit to operate at a very...

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Bibliographic Details
Main Authors: Jongbin Kim, Woo-Rim Lee, Hoon-Ju Chung, Seung-Woo Lee
Format: Article
Language:English
Published: MDPI AG 2020-11-01
Series:Electronics
Subjects:
low-temperature poly-silicon and oxide (LTPO)
low-power display
memory-in-pixel (MIP)
thin-film transistors
Online Access:https://www.mdpi.com/2079-9292/9/11/1958
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spelling doaj-c681c669a70242bda618dd520e2a0aa62020-11-25T04:01:22ZengMDPI AGElectronics2079-92922020-11-0191958195810.3390/electronics9111958A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film TransistorsJongbin Kim0Woo-Rim Lee1Hoon-Ju Chung2Seung-Woo Lee3Department of Information Display, Kyung Hee University, Seoul 02447, KoreaDepartment of Information Display, Kyung Hee University, Seoul 02447, KoreaSchool of Electronic Engineering, Kumoh National Institute of Technology, Gumi 39177, KoreaDepartment of Information Display, Kyung Hee University, Seoul 02447, KoreaIn this paper, a new pixel structure using low-temperature polycrystalline silicon and oxide (LTPO) thin-film transistors (TFTs) for low-power liquid crystal displays (LCDs) is proposed. The extremely low off-state current of oxide semiconductor TFTs enables the proposed circuit to operate at a very low frame frequency of 1/60 Hz, so that the power consumption can be significantly reduced. In addition, the low-temperature polycrystalline silicon TFTs with high reliability directly drive pixels, which can achieve stable and flicker-free LCDs. The proposed circuit is fabricated using the LTPO TFT backplane and successfully verified by simulation and measurement results. The measurement results prove that the proposed circuit operates well without further programming for 60 s, and the power consumption in the panel (except backlight power) can be reduced to 0.02% of that of conventional LCD.https://www.mdpi.com/2079-9292/9/11/1958low-temperature poly-silicon and oxide (LTPO)low-power displaymemory-in-pixel (MIP)thin-film transistors
collection DOAJ
language English
format Article
sources DOAJ
author Jongbin Kim
Woo-Rim Lee
Hoon-Ju Chung
Seung-Woo Lee
spellingShingle Jongbin Kim
Woo-Rim Lee
Hoon-Ju Chung
Seung-Woo Lee
A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film Transistors
Electronics
low-temperature poly-silicon and oxide (LTPO)
low-power display
memory-in-pixel (MIP)
thin-film transistors
author_facet Jongbin Kim
Woo-Rim Lee
Hoon-Ju Chung
Seung-Woo Lee
author_sort Jongbin Kim
title A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film Transistors
title_short A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film Transistors
title_full A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film Transistors
title_fullStr A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film Transistors
title_full_unstemmed A Low-Power Memory-in-Pixel Circuit for Liquid Crystal Displays Comprising Low-Temperature Poly-Silicon and Oxide Thin-Film Transistors
title_sort low-power memory-in-pixel circuit for liquid crystal displays comprising low-temperature poly-silicon and oxide thin-film transistors
publisher MDPI AG
series Electronics
issn 2079-9292
publishDate 2020-11-01
description In this paper, a new pixel structure using low-temperature polycrystalline silicon and oxide (LTPO) thin-film transistors (TFTs) for low-power liquid crystal displays (LCDs) is proposed. The extremely low off-state current of oxide semiconductor TFTs enables the proposed circuit to operate at a very low frame frequency of 1/60 Hz, so that the power consumption can be significantly reduced. In addition, the low-temperature polycrystalline silicon TFTs with high reliability directly drive pixels, which can achieve stable and flicker-free LCDs. The proposed circuit is fabricated using the LTPO TFT backplane and successfully verified by simulation and measurement results. The measurement results prove that the proposed circuit operates well without further programming for 60 s, and the power consumption in the panel (except backlight power) can be reduced to 0.02% of that of conventional LCD.
topic low-temperature poly-silicon and oxide (LTPO)
low-power display
memory-in-pixel (MIP)
thin-film transistors
url https://www.mdpi.com/2079-9292/9/11/1958
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