发明授权
US08330693B2 Two-stage drive waveform for switching a dual frequency liquid crystal (DFLC) at large tilt angles
有权
用于以大倾角切换双频液晶(DFLC)的两级驱动波形
- 专利标题: Two-stage drive waveform for switching a dual frequency liquid crystal (DFLC) at large tilt angles
- 专利标题(中): 用于以大倾角切换双频液晶(DFLC)的两级驱动波形
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申请号: US12497025申请日: 2009-07-02
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公开(公告)号: US08330693B2公开(公告)日: 2012-12-11
- 发明人: Bing Wen , Dong-Feng Gu
- 申请人: Bing Wen , Dong-Feng Gu
- 申请人地址: US CA Thousand Oaks
- 专利权人: Teledyne Scientific & Imaging, LLC
- 当前专利权人: Teledyne Scientific & Imaging, LLC
- 当前专利权人地址: US CA Thousand Oaks
- 代理商 Eric A. Gifford
- 主分类号: G09G3/36
- IPC分类号: G09G3/36 ; G02F1/133
摘要:
A two-stage drive waveform switches a DFLC from a high tilt state to a low tilt state quickly and without scattering. A relaxation voltage is applied to delay the onset of the high amplitude high frequency kick voltage when switching from a high tilt state to a low tilt state. The relaxation voltage allows the molecules to ‘relax’ in accordance with their own elasticity towards their low tilt state in the direction of the average azimuth angle of the low tilt state. The kick voltage is then applied to drive the molecules quickly to the low tilt state. Optimal switching time and the desired molecular response is achieved by delaying the onset of the large kick voltage via application of the relaxation voltage. The relaxation voltage may constitute a lower amplitude holding voltage, a small or zero DC voltage or a smooth windowing of the kick voltage.
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