Lee You-Jin, Kim Young-Ki, Jo Soo In, Gwag Jin Seog, Yu Chang-Jae, Kim Jae-Hoon
Department of Information Display Engineering, Hanyang University, Seoul, Korea.
Opt Express. 2009 Jun 8;17(12):10298-303. doi: 10.1364/oe.17.010298.
We proposed a patterned vertical alignment (PVA) mode controlled by a modified surface with ultraviolet (UV) curable reactive mesogen (RM) mixed with vertical alignment material for a liquid crystal display (LCD) with fast response time. In the surface-controlled PVA (SC-PVA) mode, the RM monomers in the alignment layer are polymerized along the LC directors by UV exposure under an applied voltage. The polymerized RMs produce a pretilt against the substrate normal depending on the applied field direction in the patterned electrode configuration. In such SC-PVA mode, fast response time was achieved at whole grey levels with the predetermined rotational preference of the LC directors governed by the pretilt direction.
我们提出了一种图案化垂直取向（PVA）模式，该模式由经过改性的表面控制，此表面含有紫外线（UV）可固化的反应性液晶基元（RM），并与垂直取向材料混合，用于具有快速响应时间的液晶显示器（LCD）。在表面控制的PVA（SC-PVA）模式中，取向层中的RM单体在施加电压下通过紫外线曝光沿着液晶指向矢聚合。聚合后的RM根据图案化电极配置中的外加场方向产生相对于基板法线的预倾角。在这种SC-PVA模式下，在整个灰度级都实现了快速响应时间，液晶指向矢的预定旋转偏好由预倾角方向控制。
