A Low-Power Phase Compression Design Methodology on TFT-LCD Column Driver for Dot-Inversion Method
博士 === 國立清華大學 === 電機工程學系 === 93 === A novel multi-phase charge-sharing technique is proposed for the dot inversion method to reduce AC power consumption of the TFT-LCD column driver without requiring any external capacitor for charge conservation. The Searching Algorithm discovers near-optimal conf...
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ndltd-TW-093NTHU54420282016-06-06T04:11:21Z http://ndltd.ncl.edu.tw/handle/98287586651115018406 A Low-Power Phase Compression Design Methodology on TFT-LCD Column Driver for Dot-Inversion Method 液晶顯示器驅動晶片的低功率相位壓縮設計 Shao-Sheng Yang 楊紹聖 博士 國立清華大學 電機工程學系 93 A novel multi-phase charge-sharing technique is proposed for the dot inversion method to reduce AC power consumption of the TFT-LCD column driver without requiring any external capacitor for charge conservation. The Searching Algorithm discovers near-optimal configurations. After the exhaustive search, Phase Compression is also applied to reduce the time of charge conservation. For realistic consideration, the switching distance is limited to reduce the complexity of Searching Algorithm and decrease switch routing between column lines. Simple and easy-to-control circuitry is applied in the proposed method, and the power saving efficiency depends on number of charge phases. Increasing the number of charge phases, the saving power efficiency is also raised. Excluding power dissipation of switches, the power saving efficiency is up to 75% theoretically with infinite phases. For previous work, the maximum power saving efficient is 50% without external capacitor. The HSPICE simulation results including power dissipation of all switches show that the proposed method with seven charge phases (eight-column lines as one group) decreases the power consumption of 23%-68% and 10%-18%, respectively, compared with original circuit (without any low-power scheme) and previous low-power charge-recycling works. Tsin-Yuan Chang 張慶元 2005 學位論文 ; thesis 61 en_US |
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博士 === 國立清華大學 === 電機工程學系 === 93 === A novel multi-phase charge-sharing technique is proposed for the dot inversion method to reduce AC power consumption of the TFT-LCD column driver without requiring any external capacitor for charge conservation. The Searching Algorithm discovers near-optimal configurations. After the exhaustive search, Phase Compression is also applied to reduce the time of charge conservation. For realistic consideration, the switching distance is limited to reduce the complexity of Searching Algorithm and decrease switch routing between column lines. Simple and easy-to-control circuitry is applied in the proposed method, and the power saving efficiency depends on number of charge phases. Increasing the number of charge phases, the saving power efficiency is also raised. Excluding power dissipation of switches, the power saving efficiency is up to 75% theoretically with infinite phases. For previous work, the maximum power saving efficient is 50% without external capacitor. The HSPICE simulation results including power dissipation of all switches show that the proposed method with seven charge phases (eight-column lines as one group) decreases the power consumption of 23%-68% and 10%-18%, respectively, compared with original circuit (without any low-power scheme) and previous low-power charge-recycling works.
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author2 |
Tsin-Yuan Chang |
author_facet |
Tsin-Yuan Chang Shao-Sheng Yang 楊紹聖 |
author |
Shao-Sheng Yang 楊紹聖 |
spellingShingle |
Shao-Sheng Yang 楊紹聖 A Low-Power Phase Compression Design Methodology on TFT-LCD Column Driver for Dot-Inversion Method |
author_sort |
Shao-Sheng Yang |
title |
A Low-Power Phase Compression Design Methodology on TFT-LCD Column Driver for Dot-Inversion Method |
title_short |
A Low-Power Phase Compression Design Methodology on TFT-LCD Column Driver for Dot-Inversion Method |
title_full |
A Low-Power Phase Compression Design Methodology on TFT-LCD Column Driver for Dot-Inversion Method |
title_fullStr |
A Low-Power Phase Compression Design Methodology on TFT-LCD Column Driver for Dot-Inversion Method |
title_full_unstemmed |
A Low-Power Phase Compression Design Methodology on TFT-LCD Column Driver for Dot-Inversion Method |
title_sort |
low-power phase compression design methodology on tft-lcd column driver for dot-inversion method |
publishDate |
2005 |
url |
http://ndltd.ncl.edu.tw/handle/98287586651115018406 |
work_keys_str_mv |
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