Driving Scheme Using Bootstrapping Method for Blue-Phase LCDs

We present a new pixel circuit on glass using hydrogenated amorphous silicon (a-Si:H) for driving polymer-stabilized blue-phase liquid crystal displays (BPLCDs). Different from conventional nematics, BPLC demands a large dielectric anisotropy in order to lower the operation voltage. As a result, the pixel's capacitance is increased by ~ 10×, which seriously limits the charging capability and optical efficiency. Simulation results show that the average error rate of storage voltage in pixel circuit is below 5.14% for 180 Hz operating frequency.

[1]  Shin-Tson Wu,et al.  A large Kerr constant polymer-stabilized blue phase liquid crystal , 2011 .

[2]  Shin-Tson Wu,et al.  Modeling of Blue Phase Liquid Crystal Displays , 2009, Journal of Display Technology.

[3]  Shin-Tson Wu,et al.  A microsecond-response polymer-stabilized blue phase liquid crystal , 2011 .

[4]  Shin-Tson Wu,et al.  Blue-Phase Liquid Crystal Displays With Vertical Field Switching , 2012, Journal of Display Technology.

[5]  Shin-Tson Wu,et al.  Submillisecond Gray-Level Response Time of a Polymer-Stabilized Blue-Phase Liquid Crystal , 2010, Journal of Display Technology.

[6]  Masayuki Yokota,et al.  Polymer-stabilized liquid crystal blue phases , 2002, Nature materials.

[7]  Hiroyuki Miyake,et al.  A novel field‐sequential blue‐phase‐mode AMLCD , 2012 .

[8]  Takahiro Ishinabe,et al.  Vertical field switching for blue-phase liquid crystal devices , 2011 .

[9]  Shin-Tson Wu,et al.  Polymer-stabilized optically isotropic liquid crystals for next-generation display and photonics applications , 2011 .

[10]  Shin‐Tson Wu,et al.  Electro-optics of polymer-stabilized blue phase liquid crystal displays , 2009 .

[11]  Shin-Tson Wu,et al.  Low voltage blue-phase liquid crystal displays , 2009 .

[12]  Yan Li,et al.  Low voltage and high transmittance blue-phase liquid crystal displays with corrugated electrodes , 2010 .

[13]  Yung-Hsiang Chiu,et al.  Critical Field for a Hysteresis-Free BPLC Device , 2011, Journal of Display Technology.

[14]  Shin-Tson Wu,et al.  Wall-shaped electrodes for reducing the operation voltage of polymer-stabilized blue phase liquid crystal displays , 2009 .

[15]  Kang-Hung Liu,et al.  Wide-View Vertical Field Switching Blue-Phase LCD , 2012, Journal of Display Technology.

[16]  Michael Wittek,et al.  4.4: New Materials for Polymer‐Stabilized Blue Phase , 2012 .