LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays

Yi Chien Chen; Bo Shu Chen; Jui Hung Chang; Chih Lung Lin

LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays

Yi Chien Chen
, Bo Shu Chen
, Jui Hung Chang
, Chih Lung Lin

Department of Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

This paper proposes a pixel circuit combining with a leakage current prevention mechanism for use in wearable AMOLED displays. The pixel circuit consists of nine TFTs and two capacitors to eliminate the variations of the dnving current caused by the threshold voltage (V_TH) vanations of the driving TFT. The vanation of the voltage at the gate node of the driving TFT is compensated for by using a capacitor to store a specific voltage to minimize the leakage current of LTPS TFTs. Moreover, the proposed circuit prevents the current from flowing through the OLED during the programming period. The simulation results indicate that the proposed pixel circuit successfully compensates for the vanations of V_TH of the dnving TFT and solves the leakage current problem. Therefore, the proposed pixel circuit is appropnate for low-frame-rate display.

Original language	English
Title of host publication	Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publication	TFT Technologies and FPD Materials
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	73-76
Number of pages	4
ISBN (Electronic)	9784991216909
Publication status	Published - 2021
Event	28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2021 - Virtual, Online, Japan Duration: 2021 Jun 29 → 2021 Jul 2

Publication series

Name	Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials

Conference

Conference	28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2021
Country/Territory	Japan
City	Virtual, Online
Period	21-06-29 → 21-07-02

All Science Journal Classification (ASJC) codes

Computer Graphics and Computer-Aided Design
Media Technology
Electronic, Optical and Magnetic Materials
Instrumentation

Cite this

Chen, Y. C., Chen, B. S., Chang, J. H., & Lin, C. L. (2021). LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays. In Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials (pp. 73-76). (Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials). Institute of Electrical and Electronics Engineers Inc..

Chen, Yi Chien ; Chen, Bo Shu ; Chang, Jui Hung et al. / LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays. Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials. Institute of Electrical and Electronics Engineers Inc., 2021. pp. 73-76 (Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials).

@inproceedings{bd96772c68de4f2f9fac00960a506371,

title = "LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays",

abstract = "This paper proposes a pixel circuit combining with a leakage current prevention mechanism for use in wearable AMOLED displays. The pixel circuit consists of nine TFTs and two capacitors to eliminate the variations of the dnving current caused by the threshold voltage (VTH) vanations of the driving TFT. The vanation of the voltage at the gate node of the driving TFT is compensated for by using a capacitor to store a specific voltage to minimize the leakage current of LTPS TFTs. Moreover, the proposed circuit prevents the current from flowing through the OLED during the programming period. The simulation results indicate that the proposed pixel circuit successfully compensates for the vanations of VTH of the dnving TFT and solves the leakage current problem. Therefore, the proposed pixel circuit is appropnate for low-frame-rate display.",

author = "Chen, \{Yi Chien\} and Chen, \{Bo Shu\} and Chang, \{Jui Hung\} and Lin, \{Chih Lung\}",

note = "Funding Information: IMs work was supported in part by the Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan, and fee Ministry of Science and Technology of Taiwan under Projects of MOST 107-2221-E-006-188-MY3, as well as AU Optronics Corporation is appreciatedfor its technical and funding support. Publisher Copyright: {\textcopyright} 2021 FTFMD; 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2021 ; Conference date: 29-06-2021 Through 02-07-2021",

year = "2021",

language = "English",

series = "Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "73--76",

booktitle = "Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices",

address = "United States",

}

Chen, YC, Chen, BS, Chang, JH & Lin, CL 2021, LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays. in Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials. Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Institute of Electrical and Electronics Engineers Inc., pp. 73-76, 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2021, Virtual, Online, Japan, 21-06-29.

LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays. / Chen, Yi Chien; Chen, Bo Shu; Chang, Jui Hung et al.
Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials. Institute of Electrical and Electronics Engineers Inc., 2021. p. 73-76 (Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays

AU - Chen, Yi Chien

AU - Chen, Bo Shu

AU - Chang, Jui Hung

AU - Lin, Chih Lung

N1 - Funding Information: IMs work was supported in part by the Advanced Optoelectronic Technology Center, National Cheng Kung University, Tainan, Taiwan, and fee Ministry of Science and Technology of Taiwan under Projects of MOST 107-2221-E-006-188-MY3, as well as AU Optronics Corporation is appreciatedfor its technical and funding support. Publisher Copyright: © 2021 FTFMD

PY - 2021

Y1 - 2021

N2 - This paper proposes a pixel circuit combining with a leakage current prevention mechanism for use in wearable AMOLED displays. The pixel circuit consists of nine TFTs and two capacitors to eliminate the variations of the dnving current caused by the threshold voltage (VTH) vanations of the driving TFT. The vanation of the voltage at the gate node of the driving TFT is compensated for by using a capacitor to store a specific voltage to minimize the leakage current of LTPS TFTs. Moreover, the proposed circuit prevents the current from flowing through the OLED during the programming period. The simulation results indicate that the proposed pixel circuit successfully compensates for the vanations of VTH of the dnving TFT and solves the leakage current problem. Therefore, the proposed pixel circuit is appropnate for low-frame-rate display.

AB - This paper proposes a pixel circuit combining with a leakage current prevention mechanism for use in wearable AMOLED displays. The pixel circuit consists of nine TFTs and two capacitors to eliminate the variations of the dnving current caused by the threshold voltage (VTH) vanations of the driving TFT. The vanation of the voltage at the gate node of the driving TFT is compensated for by using a capacitor to store a specific voltage to minimize the leakage current of LTPS TFTs. Moreover, the proposed circuit prevents the current from flowing through the OLED during the programming period. The simulation results indicate that the proposed pixel circuit successfully compensates for the vanations of VTH of the dnving TFT and solves the leakage current problem. Therefore, the proposed pixel circuit is appropnate for low-frame-rate display.

UR - https://www.scopus.com/pages/publications/85125794081

UR - https://www.scopus.com/pages/publications/85125794081#tab=citedBy

M3 - Conference contribution

AN - SCOPUS:85125794081

T3 - Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials

SP - 73

EP - 76

BT - Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2021

Y2 - 29 June 2021 through 2 July 2021

ER -

Chen YC, Chen BS, Chang JH, Lin CL. LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays. In Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials. Institute of Electrical and Electronics Engineers Inc. 2021. p. 73-76. (Proceedings of AM-FPD 2021 - 28th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials).

LTPS Pixel Circuit Using Additional Capacitor Structure to Prevent Leakage Current for Low-Frame-Rate Displays

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