Let’s get into more information about RM257

RM257 is a nematic liquid crystal monomer (at 67–130 °C), that can be aligned by an electric field. This molecule has a 4:1 length ratio and stick structure. Its long axis is easy to bend and has some stiffness. Moreover, the molecular ends consist of polar or polarizable groups to keep the molecules in a well-ordered orientation.

The backflow effect refers to the joint influence of the tilt angle change and the flow effect in an LCD. In the applying voltage, vertical alignment liquid crystal display (VA-LCD), the backflow effect is shown as optical bounce (OB). The OB phenomenon significantly increases response time, limiting the use of VA-LCD in LC devices that demand quick response speed. To eliminate the OB phenomenon during polymerization, little amount of bi-functional linear polymer monomer RM257 can be used to VA-LCD. As a result, a rapid reaction speed can be obtained. A modest amount of RM257 raises the saturation voltage while decreasing the transmittance of the bright state. The VA-LCD with polymer monomer offers a simple manufacturing process, which is vital for its wide applications. The polymer monomer in the VA cell forms many vertical alignment fibers after polymerization. It has a certain anchoring effect on the LC molecules during the application of an electric field. Moreover, the horizontal flow of the LC molecules can also be blocked. The backflow impact is thus eliminated.