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author:

Wang, Keren (Wang, Keren.) [1] | Ye, Jinyu (Ye, Jinyu.) [2] | Su, Wenjuan (Su, Wenjuan.) [3] | Lin, Yibin (Lin, Yibin.) [4] | Zhou, Xiongtu (Zhou, Xiongtu.) [5] | Lin, Jianpu (Lin, Jianpu.) [6] | Guo, Tailiang (Guo, Tailiang.) [7] | Wu, Chaoxing (Wu, Chaoxing.) [8] | Zhang, Yongai (Zhang, Yongai.) [9]

Indexed by:

EI Scopus SCIE

Abstract:

The driving capability of Micro-LED displays based on thin film transistor (TFT) often falls short due to limited TFT current output performance. In this study, we propose a 6T2C pixel circuit for micro light-emitting-triode (Micro-LET), which integrates GaN-based LED and bipolar junction transistor (BJT) in a single chip vertically. The proposed pixel circuit, utilizing low-temperature polysilicon (LTPS) TFT, effectively compensates for threshold voltage shifts and mobility variations, thereby addressing the issue of pixel non-uniformity. Circuit simulation results demonstrate that the current error rates (CER) of the emission current are less than 4.71 % and 1.83 %, respectively, when subjected to +0.5 V threshold voltage change and +30 % mobility variation. Furthermore, the LTPS TFT can be extended to amorphous silicon (a-Si) TFT in the pixel circuit, showcasing its potential in enabling high-brightness Micro-LED displays driven by a-Si TFT technology with current amplification capabilities. These findings validate the feasibility of cost-effective and highly luminous Micro-LED displays while also alleviating concerns regarding overcapacity issues associated with a-Si TFT.

Keyword:

a -Si TFT LTPS TFT Micro-LED Mobility variations Pixel circuit Threshold voltage

Community:

  • [ 1 ] [Wang, Keren]Fuzhou Univ, Sch Adv Mfg, Fuzhou 350108, Peoples R China
  • [ 2 ] [Lin, Jianpu]Fuzhou Univ, Sch Adv Mfg, Fuzhou 350108, Peoples R China
  • [ 3 ] [Ye, Jinyu]Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350108, Peoples R China
  • [ 4 ] [Su, Wenjuan]Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350108, Peoples R China
  • [ 5 ] [Zhou, Xiongtu]Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350108, Peoples R China
  • [ 6 ] [Guo, Tailiang]Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350108, Peoples R China
  • [ 7 ] [Wu, Chaoxing]Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350108, Peoples R China
  • [ 8 ] [Zhang, Yongai]Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350108, Peoples R China
  • [ 9 ] [Lin, Yibin]Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Peoples R China
  • [ 10 ] [Zhou, Xiongtu]Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Peoples R China
  • [ 11 ] [Guo, Tailiang]Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Peoples R China
  • [ 12 ] [Wu, Chaoxing]Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Peoples R China
  • [ 13 ] [Zhang, Yongai]Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Peoples R China

Reprint 's Address:

  • 张永爱

    [Zhou, Xiongtu]Fuzhou Univ, Coll Phys & Informat Engn, Fujian Sci Technol Innovat Lab Optoelect Informat, Fuzhou 350108, Peoples R China;;[Wu, Chaoxing]Fuzhou Univ, Coll Phys & Informat Engn, Fujian Sci Technol Innovat Lab Optoelect Informat, Fuzhou 350108, Peoples R China;;[Zhang, Yongai]Fuzhou Univ, Coll Phys & Informat Engn, Fujian Sci Technol Innovat Lab Optoelect Informat, Fuzhou 350108, Peoples R China

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Source :

MICROELECTRONICS JOURNAL

ISSN: 0959-8324

Year: 2025

Volume: 158

1 . 9 0 0

JCR@2023

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

Online/Total:1177/10966708
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