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Simulation model of polymer stabilized blue-phase liquid crystal devices
- Chinese Journal of Liquid Crystals and Displays Vol. 36, Issue 12, Pages: 1614-1622(2021)
- 作者机构：
河北工业大学 应用物理系, 天津 300401
- 作者简介：
- 基金信息：
DOI：10.37188/CJLCD.2021-0235
CLC： TP141.9Received：06 September 2021，
Revised：18 September 2021，
Published：2021-12
- 稿件说明：
移动端阅览
Bo ZHANG, Chun-xin HU, Meng-xiao JIA, et al. Simulation model of polymer stabilized blue-phase liquid crystal devices[J]. Chinese journal of liquid crystals and displays, 2021, 36(12): 1614-1622.
Bo ZHANG, Chun-xin HU, Meng-xiao JIA, et al. Simulation model of polymer stabilized blue-phase liquid crystal devices[J]. Chinese journal of liquid crystals and displays, 2021, 36(12): 1614-1622. DOI： 10.37188/CJLCD.2021-0235.
摘要
为更好地研究聚合物稳定蓝相液晶器件，在考虑聚合物和蓝相液晶的介电常数差异和电场作用的变化后，建立适用于聚合物稳定蓝相液晶显示器的理论模型。首先，针对两组聚合物配比的蓝相液晶显示器的实验结果，进行模拟计算拟合，获得了蓝相液晶的饱和双折射率接近于主体液晶双折射率的结果。然后，研究了聚合物单体的介电常数和含量对驱动电压的影响。最后，研究了共面电场驱动的聚合物稳定蓝相液晶显示器的电极宽度和间隙对驱动电压和透过率的影响，获得了高透过率和低驱动电压的器件结构。随着非液晶材料介电常数的增加，驱动电压下降，并且其质量分数越大，驱动电压下降幅度越大。对于一般蓝相液晶中非液晶材料质量分数约为10%质量分数的情况，驱动电压可以从97 V（
ε
P
=3）下降到55 V（
ε
P
=30），最大透过率变化很小，甚至可以忽略。并且非液晶材料的介电常数不同，仅影响驱动电压的大小，对最大透过率和电光曲线的形状影响很小。研究结果对优化聚合物稳定蓝相液晶的材料构成和改进聚合物稳定蓝相液晶器件有重要的指导意义。
Abstract
In order to better study the polymer stabilized blue phase liquid crystal devices
considering the difference of dielectric constant between polymer and blue phase liquid crystal and the change of electric field
we established a theoretical model suitable for polymer stabilized blue phase liquid crystal display. Firstly
we calculated the simulation result to fit the experiment results of blue phase liquid crystal displays with two group of polymer ratio
and obtained the saturation birefringence of blue phase liquid crystal close to the birefringence of liquid crystal. Then
we studied the influence of dielectric constant and content of polymer monomer on driving voltage. Finally
we calculated the influence of electrode width and gap on the operating voltage and transmittance of polymer stabilized blue phase liquid crystals devices driven by in-plane electric field
and obtained the device structure with high transmittance and low operating voltage. With the increasing dielectric constant of the non-liquid crystal material
the operating voltage is decreased
and the greater the content
the greater the operating voltage decreased. For the non-liquid crystal material content of the general blue liquid crystal being about 10%
the operating voltage can reduced from 97 V(
ε
P
=3) to 55 V(
ε
P
=30)
the change of the maximum transmittance is very small
even can be ignored. In addition
the different dielectric constant of non-liquid crystal materials only affect the operating voltage
and has a little effect on the maximum transmittance and the shape of electro-optic curve. The results have important guiding significance for optimizing the material composition of polymer stabilized blue phase liquid crystal and improving polymer stabilized blue phase liquid crystal devices.
关键词
Keywords
references
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