New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays

Wei Sheng Liao, Po Syun Chen, Chia Ling Tsai, Chih Lung Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work proposes a simple-structure pixel circuit composed of low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) and external threshold voltage (VTH) compensation circuit shared by whole row for active-matrix organic light-emitting diode (AMOLED) displays. This proposed circuit combines parallel addressing scheme and voltage-programming method to increase compensation time for accurately detecting threshold voltage variations of driving TFT, and the voltage drop (I-R drop) in power line. Simulation results show that the relative emission current error rates are below 2.93 % and 2.62 % when variations of VTH are ± 0.5 V and VDD I-R drop is ±0.5 V, respectively, verifying that the novel pixel design has great potential for use in high resolution AMOLED displays.

Original languageEnglish
Title of host publicationAM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publicationTFT Technologies and FPD Materials, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9784990875374
DOIs
Publication statusPublished - 2019 Jul
Event26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2019 - Kyoto, Japan
Duration: 2019 Jul 22019 Jul 5

Publication series

NameAM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings

Conference

Conference26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2019
CountryJapan
CityKyoto
Period19-07-0219-07-05

Fingerprint

Organic light emitting diodes (OLED)
luminance
Luminance
light emitting diodes
Display devices
Threshold voltage
threshold voltage
Networks (circuits)
high resolution
matrices
Pixels
pixels
power lines
electric potential
Thin film transistors
programming
Polysilicon
transistors
Electric potential
silicon

All Science Journal Classification (ASJC) codes

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

Cite this

Liao, W. S., Chen, P. S., Tsai, C. L., & Lin, C. L. (2019). New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays. In AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings [8830603] (AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/AM-FPD.2019.8830603
Liao, Wei Sheng ; Chen, Po Syun ; Tsai, Chia Ling ; Lin, Chih Lung. / New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays. AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2019. (AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings).
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title = "New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays",
abstract = "This work proposes a simple-structure pixel circuit composed of low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) and external threshold voltage (VTH) compensation circuit shared by whole row for active-matrix organic light-emitting diode (AMOLED) displays. This proposed circuit combines parallel addressing scheme and voltage-programming method to increase compensation time for accurately detecting threshold voltage variations of driving TFT, and the voltage drop (I-R drop) in power line. Simulation results show that the relative emission current error rates are below 2.93 {\%} and 2.62 {\%} when variations of VTH are ± 0.5 V and VDD I-R drop is ±0.5 V, respectively, verifying that the novel pixel design has great potential for use in high resolution AMOLED displays.",
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Liao, WS, Chen, PS, Tsai, CL & Lin, CL 2019, New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays. in AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings., 8830603, AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings, Institute of Electrical and Electronics Engineers Inc., 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, AM-FPD 2019, Kyoto, Japan, 19-07-02. https://doi.org/10.23919/AM-FPD.2019.8830603

New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays. / Liao, Wei Sheng; Chen, Po Syun; Tsai, Chia Ling; Lin, Chih Lung.

AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2019. 8830603 (AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays

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AU - Tsai, Chia Ling

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PY - 2019/7

Y1 - 2019/7

N2 - This work proposes a simple-structure pixel circuit composed of low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) and external threshold voltage (VTH) compensation circuit shared by whole row for active-matrix organic light-emitting diode (AMOLED) displays. This proposed circuit combines parallel addressing scheme and voltage-programming method to increase compensation time for accurately detecting threshold voltage variations of driving TFT, and the voltage drop (I-R drop) in power line. Simulation results show that the relative emission current error rates are below 2.93 % and 2.62 % when variations of VTH are ± 0.5 V and VDD I-R drop is ±0.5 V, respectively, verifying that the novel pixel design has great potential for use in high resolution AMOLED displays.

AB - This work proposes a simple-structure pixel circuit composed of low-temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) and external threshold voltage (VTH) compensation circuit shared by whole row for active-matrix organic light-emitting diode (AMOLED) displays. This proposed circuit combines parallel addressing scheme and voltage-programming method to increase compensation time for accurately detecting threshold voltage variations of driving TFT, and the voltage drop (I-R drop) in power line. Simulation results show that the relative emission current error rates are below 2.93 % and 2.62 % when variations of VTH are ± 0.5 V and VDD I-R drop is ±0.5 V, respectively, verifying that the novel pixel design has great potential for use in high resolution AMOLED displays.

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M3 - Conference contribution

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Liao WS, Chen PS, Tsai CL, Lin CL. New External Compensated Circuit to Achieve Uniform OLED Luminance for High-Resolution AMOLED Displays. In AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc. 2019. 8830603. (AM-FPD 2019 - 26th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings). https://doi.org/10.23919/AM-FPD.2019.8830603