Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays

Chih Cheng Hsu; Chun Ming Lu; Po Chun Lai; Po Syun Chen; Chih Lung Lin

Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays

Chih Cheng Hsu, Chun Ming Lu, Po Chun Lai, Po Syun Chen, Chih Lung Lin

Department of Electrical Engineering

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

Abstract

This work proposes a new pixel circuit of low-Temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for active-matrix organic light-emitting diode (AMOLED) displays, which combines parallel addressing scheme, current-programmed, and voltage-programmed methods. The proposed pixel circuit is used to compensate for the threshold voltage variations of driving TFT, and the current-resistance voltage drop in power line (I-R drop). Moreover, the proposed pixel circuit can avoid flicker and extend compensation time. The simulation results demonstrate that the relative current error rates are less than 5% and 1% as the variations of threshold voltage and I-R drop are ±0.5 V and -0.5 V, respectively.

Original language	English
Title of host publication	AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices
Subtitle of host publication	TFT Technologies and FPD Materials, Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	147-150
Number of pages	4
ISBN (Electronic)	9784990875336
Publication status	Published - 2017 Aug 8
Event	24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017 - Kyoto, Japan Duration: 2017 Jul 4 → 2017 Jul 7

Publication series

Name	AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings

Other

Other	24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017
Country	Japan
City	Kyoto
Period	17-07-04 → 17-07-07

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering
Computational Theory and Mathematics

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Hsu, C. C., Lu, C. M., Lai, P. C., Chen, P. S., & Lin, C. L. (2017). Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays. In AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings (pp. 147-150). [8006104] (AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings). Institute of Electrical and Electronics Engineers Inc..

Hsu, Chih Cheng ; Lu, Chun Ming ; Lai, Po Chun ; Chen, Po Syun ; Lin, Chih Lung. / Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays. AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2017. pp. 147-150 (AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings).

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title = "Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays",

abstract = "This work proposes a new pixel circuit of low-Temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for active-matrix organic light-emitting diode (AMOLED) displays, which combines parallel addressing scheme, current-programmed, and voltage-programmed methods. The proposed pixel circuit is used to compensate for the threshold voltage variations of driving TFT, and the current-resistance voltage drop in power line (I-R drop). Moreover, the proposed pixel circuit can avoid flicker and extend compensation time. The simulation results demonstrate that the relative current error rates are less than 5% and 1% as the variations of threshold voltage and I-R drop are ±0.5 V and -0.5 V, respectively.",

author = "Hsu, {Chih Cheng} and Lu, {Chun Ming} and Lai, {Po Chun} and Chen, {Po Syun} and Lin, {Chih Lung}",

year = "2017",

month = aug,

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language = "English",

series = "AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings",

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booktitle = "AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices",

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note = "24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017 ; Conference date: 04-07-2017 Through 07-07-2017",

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Hsu, CC, Lu, CM, Lai, PC, Chen, PS & Lin, CL 2017, Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays. in AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings., 8006104, AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings, Institute of Electrical and Electronics Engineers Inc., pp. 147-150, 24th International Workshop on Active-Matrix Flatpanel Displays and Devices, AM-FPD 2017, Kyoto, Japan, 17-07-04.

Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays. / Hsu, Chih Cheng; Lu, Chun Ming; Lai, Po Chun; Chen, Po Syun; Lin, Chih Lung.

AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2017. p. 147-150 8006104 (AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings).

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

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T1 - Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays

AU - Hsu, Chih Cheng

AU - Lu, Chun Ming

AU - Lai, Po Chun

AU - Chen, Po Syun

AU - Lin, Chih Lung

PY - 2017/8/8

Y1 - 2017/8/8

N2 - This work proposes a new pixel circuit of low-Temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for active-matrix organic light-emitting diode (AMOLED) displays, which combines parallel addressing scheme, current-programmed, and voltage-programmed methods. The proposed pixel circuit is used to compensate for the threshold voltage variations of driving TFT, and the current-resistance voltage drop in power line (I-R drop). Moreover, the proposed pixel circuit can avoid flicker and extend compensation time. The simulation results demonstrate that the relative current error rates are less than 5% and 1% as the variations of threshold voltage and I-R drop are ±0.5 V and -0.5 V, respectively.

AB - This work proposes a new pixel circuit of low-Temperature polycrystalline-silicon thin-film transistors (LTPS-TFTs) for active-matrix organic light-emitting diode (AMOLED) displays, which combines parallel addressing scheme, current-programmed, and voltage-programmed methods. The proposed pixel circuit is used to compensate for the threshold voltage variations of driving TFT, and the current-resistance voltage drop in power line (I-R drop). Moreover, the proposed pixel circuit can avoid flicker and extend compensation time. The simulation results demonstrate that the relative current error rates are less than 5% and 1% as the variations of threshold voltage and I-R drop are ±0.5 V and -0.5 V, respectively.

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T3 - AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings

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BT - AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices

PB - Institute of Electrical and Electronics Engineers Inc.

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Hsu CC, Lu CM, Lai PC, Chen PS, Lin CL. Pixel circuit with external current source to achieve fast compensation for variations of LTPS TFTs for AMOLED displays. In AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings. Institute of Electrical and Electronics Engineers Inc. 2017. p. 147-150. 8006104. (AM-FPD 2017 - 24th International Workshop on Active-Matrix Flatpanel Displays and Devices: TFT Technologies and FPD Materials, Proceedings).