A New Dual-Frequency Liquid Crystal Lens with Ring-and-Pie Electrodes and a Driving Scheme to Prevent Disclination Lines and Improve Recovery Time
A new liquid crystal lens design is proposed to improve the recovery time with a ring-and-pie electrode pattern through a suitable driving scheme and using dual-frequency liquid crystals (DFLC) MLC-2048. Compared with the conventional single hole-type liquid crystal lens, this new structure of the D...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2011-05-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/11/5/5402/ |
| _version_ | 1798025496699600896 |
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| author | Paul C.-P. Chao Yung-Yuan Kao |
| author_facet | Paul C.-P. Chao Yung-Yuan Kao |
| author_sort | Paul C.-P. Chao |
| collection | DOAJ |
| description | A new liquid crystal lens design is proposed to improve the recovery time with a ring-and-pie electrode pattern through a suitable driving scheme and using dual-frequency liquid crystals (DFLC) MLC-2048. Compared with the conventional single hole-type liquid crystal lens, this new structure of the DFLC lens is composed of only two ITO glasses, one of which is designed with the ring-and-pie pattern. For this device, one can control the orientation of liquid crystal directors via a three-stage switching procedure on the particularly-designed ring-and-pie electrode pattern. This aims to eliminate the disclination lines, and using different drive frequencies to reduce the recovery time to be less than 5 seconds. The proposed DFLC lens is shown effective in reducing recovery time, and then serves well as a potential device in places of the conventional lenses with fixed focus lengths and the conventional LC lens with a single circular-hole electrode pattern. |
| first_indexed | 2024-04-11T18:20:51Z |
| format | Article |
| id | doaj.art-4e31467f6958417eaf9726144a21450c |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T18:20:51Z |
| publishDate | 2011-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-4e31467f6958417eaf9726144a21450c2022-12-22T04:09:47ZengMDPI AGSensors1424-82202011-05-011155402541510.3390/s110505402A New Dual-Frequency Liquid Crystal Lens with Ring-and-Pie Electrodes and a Driving Scheme to Prevent Disclination Lines and Improve Recovery TimePaul C.-P. ChaoYung-Yuan KaoA new liquid crystal lens design is proposed to improve the recovery time with a ring-and-pie electrode pattern through a suitable driving scheme and using dual-frequency liquid crystals (DFLC) MLC-2048. Compared with the conventional single hole-type liquid crystal lens, this new structure of the DFLC lens is composed of only two ITO glasses, one of which is designed with the ring-and-pie pattern. For this device, one can control the orientation of liquid crystal directors via a three-stage switching procedure on the particularly-designed ring-and-pie electrode pattern. This aims to eliminate the disclination lines, and using different drive frequencies to reduce the recovery time to be less than 5 seconds. The proposed DFLC lens is shown effective in reducing recovery time, and then serves well as a potential device in places of the conventional lenses with fixed focus lengths and the conventional LC lens with a single circular-hole electrode pattern.http://www.mdpi.com/1424-8220/11/5/5402/Dual-Frequency Liquid Crystals (DFLC)tunable LC lensdisclination linesring and pie electrodes |
| spellingShingle | Paul C.-P. Chao Yung-Yuan Kao A New Dual-Frequency Liquid Crystal Lens with Ring-and-Pie Electrodes and a Driving Scheme to Prevent Disclination Lines and Improve Recovery Time Sensors Dual-Frequency Liquid Crystals (DFLC) tunable LC lens disclination lines ring and pie electrodes |
| title | A New Dual-Frequency Liquid Crystal Lens with Ring-and-Pie Electrodes and a Driving Scheme to Prevent Disclination Lines and Improve Recovery Time |
| title_full | A New Dual-Frequency Liquid Crystal Lens with Ring-and-Pie Electrodes and a Driving Scheme to Prevent Disclination Lines and Improve Recovery Time |
| title_fullStr | A New Dual-Frequency Liquid Crystal Lens with Ring-and-Pie Electrodes and a Driving Scheme to Prevent Disclination Lines and Improve Recovery Time |
| title_full_unstemmed | A New Dual-Frequency Liquid Crystal Lens with Ring-and-Pie Electrodes and a Driving Scheme to Prevent Disclination Lines and Improve Recovery Time |
| title_short | A New Dual-Frequency Liquid Crystal Lens with Ring-and-Pie Electrodes and a Driving Scheme to Prevent Disclination Lines and Improve Recovery Time |
| title_sort | new dual frequency liquid crystal lens with ring and pie electrodes and a driving scheme to prevent disclination lines and improve recovery time |
| topic | Dual-Frequency Liquid Crystals (DFLC) tunable LC lens disclination lines ring and pie electrodes |
| url | http://www.mdpi.com/1424-8220/11/5/5402/ |
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