基于菱形电极结构的高对比度平面内扭转模式蓝相液晶显示器件设计

Design of high contrast in-plane-switching polymer-stabilized blue phase liquid crystal display device based on rhombus electrodes

以往研究发现平面内扭转(In-Plane Switching,IPS)模式蓝相液晶显示器件的图像显示对比度明显低于理论预期。本文对导致这一问题的物理原理进行理论分析和实验验证,据此提出改进的菱形电极结构设计以解决这一问题。实验证明,调整走向后的IPS电极结构能使蓝相液晶显示器件的暗态漏光减小2/3,使其显示对比度提升至10 000∶1以上。基于这一实验发现,本文提出了全新的菱形电极结构设计,以求获得高对比度显示效果。除此以外,采用Techwiz仿真分析改进后的菱形IPS电极蓝相液晶显示器件的电光特性,发现其伽玛偏移和灰度反转可分别减小3/4和2/3,并且其驱动电压和透过率与传统IPS模式蓝相液晶显示器件相仿。可见,基于改进的菱形IPS电极结构的蓝相液晶显示器件相较传统蓝相液晶显示器件具备更好的显示性能和市场竞争力。

Conventional In-Plane-Switching（IPS）mode blue phase liquid crystal（BPLC）display device demonstrates lower contrast ratio than expectation.This manuscript analyzes the physical mechanism behind it and proposes revised rhombus IPS electrode to solve the problem.Experiment result confirms that IPS electrode structure with rotated direction reduces light leakage by two thirds,rising the contrast ratio of the display device to〉10 000∶1 accordingly.Based on this discovery,the rhombus IPS electrode design is proposed to pursue high contrast image in BPLC display system design.Besides,Techwiz simulation proves that＂L＂shape rhombus IPS BPLC device has similar voltage-transmission characteristics,3/4 lower Gamma shift and 2/3 lower grey scale inversion than conventional IPS BPLC.This enables rhombus IPS BPLC display as a more competitive candidate for nextgeneration display technology.