Reducing Power Consumption of AM Mini-LED Displays Using TFT-Matching Pixel Circuit

Chih Lung Lin; Yi Chien Chen; Ming Yang Deng; Jui Hung Chang; Cheng Han Ke; Chung Tien Chiu; Chia En Wu

doi:10.1109/LSSC.2023.3290089

Reducing Power Consumption of AM Mini-LED Displays Using TFT-Matching Pixel Circuit

Chih Lung Lin, Yi Chien Chen, Ming Yang Deng, Jui Hung Chang, Cheng Han Ke, Chung Tien Chiu, Chia En Wu

Research output: Contribution to journal › Article › peer-review

Abstract

This article presents a pixel circuit that is based on low-temperature polycrystalline silicon (LTPS) thin-film-transistors (TFTs) to reduce the power consumption of active-matrix (AM) mini-LED (light-emitting diode) displays. Using the TFT-matching compensation, the proposed circuit can reduce the total voltage across each pixel in the array, reducing the power consumption of the display. Compensating for the threshold voltage variation of LTPS TFTs and the current-resistance drop of VDD enables a stable driving current to be generated by the proposed circuit. To prove the reduction in power consumption, the proposed circuit and other compensating pixel circuits are compared. Simulations indicate that the power consumption of the proposed circuit is 13% lower than that of circuits with several TFTs in the driving current path. A 5.23-inch AM mini-LED display with a resolution of 160 × 135 and a frame rate of 120 Hz is implemented using the proposed circuit. Measurements demonstrate that the fabricated display produces uniform images at a gray level of 255. For the white image with a brightness of 1620 cd/m2, the power consumption of the display is 7.18 W.

Original language	English
Pages (from-to)	1
Number of pages	1
Journal	IEEE Solid-State Circuits Letters
Volume	6
DOIs	https://doi.org/10.1109/LSSC.2023.3290089
Publication status	Accepted/In press - 2023

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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10.1109/LSSC.2023.3290089

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title = "Reducing Power Consumption of AM Mini-LED Displays Using TFT-Matching Pixel Circuit",

abstract = "This article presents a pixel circuit that is based on low-temperature polycrystalline silicon (LTPS) thin-film-transistors (TFTs) to reduce the power consumption of active-matrix (AM) mini-LED (light-emitting diode) displays. Using the TFT-matching compensation, the proposed circuit can reduce the total voltage across each pixel in the array, reducing the power consumption of the display. Compensating for the threshold voltage variation of LTPS TFTs and the current-resistance drop of VDD enables a stable driving current to be generated by the proposed circuit. To prove the reduction in power consumption, the proposed circuit and other compensating pixel circuits are compared. Simulations indicate that the power consumption of the proposed circuit is 13% lower than that of circuits with several TFTs in the driving current path. A 5.23-inch AM mini-LED display with a resolution of 160 × 135 and a frame rate of 120 Hz is implemented using the proposed circuit. Measurements demonstrate that the fabricated display produces uniform images at a gray level of 255. For the white image with a brightness of 1620 cd/m2, the power consumption of the display is 7.18 W.",

author = "Lin, {Chih Lung} and Chen, {Yi Chien} and Deng, {Ming Yang} and Chang, {Jui Hung} and Ke, {Cheng Han} and Chiu, {Chung Tien} and Wu, {Chia En}",

note = "Publisher Copyright: IEEE",

year = "2023",

doi = "10.1109/LSSC.2023.3290089",

language = "English",

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T1 - Reducing Power Consumption of AM Mini-LED Displays Using TFT-Matching Pixel Circuit

AU - Lin, Chih Lung

AU - Chen, Yi Chien

AU - Deng, Ming Yang

AU - Chang, Jui Hung

AU - Ke, Cheng Han

AU - Chiu, Chung Tien

AU - Wu, Chia En

N1 - Publisher Copyright: IEEE

PY - 2023

Y1 - 2023

N2 - This article presents a pixel circuit that is based on low-temperature polycrystalline silicon (LTPS) thin-film-transistors (TFTs) to reduce the power consumption of active-matrix (AM) mini-LED (light-emitting diode) displays. Using the TFT-matching compensation, the proposed circuit can reduce the total voltage across each pixel in the array, reducing the power consumption of the display. Compensating for the threshold voltage variation of LTPS TFTs and the current-resistance drop of VDD enables a stable driving current to be generated by the proposed circuit. To prove the reduction in power consumption, the proposed circuit and other compensating pixel circuits are compared. Simulations indicate that the power consumption of the proposed circuit is 13% lower than that of circuits with several TFTs in the driving current path. A 5.23-inch AM mini-LED display with a resolution of 160 × 135 and a frame rate of 120 Hz is implemented using the proposed circuit. Measurements demonstrate that the fabricated display produces uniform images at a gray level of 255. For the white image with a brightness of 1620 cd/m2, the power consumption of the display is 7.18 W.

AB - This article presents a pixel circuit that is based on low-temperature polycrystalline silicon (LTPS) thin-film-transistors (TFTs) to reduce the power consumption of active-matrix (AM) mini-LED (light-emitting diode) displays. Using the TFT-matching compensation, the proposed circuit can reduce the total voltage across each pixel in the array, reducing the power consumption of the display. Compensating for the threshold voltage variation of LTPS TFTs and the current-resistance drop of VDD enables a stable driving current to be generated by the proposed circuit. To prove the reduction in power consumption, the proposed circuit and other compensating pixel circuits are compared. Simulations indicate that the power consumption of the proposed circuit is 13% lower than that of circuits with several TFTs in the driving current path. A 5.23-inch AM mini-LED display with a resolution of 160 × 135 and a frame rate of 120 Hz is implemented using the proposed circuit. Measurements demonstrate that the fabricated display produces uniform images at a gray level of 255. For the white image with a brightness of 1620 cd/m2, the power consumption of the display is 7.18 W.

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Reducing Power Consumption of AM Mini-LED Displays Using TFT-Matching Pixel Circuit

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