Optimal content ratio and total content of polymer monomers in polymer stabilized blue phase liquid crystal displays

ABSTRACT

In polymer-stabilised blue-phase liquid crystal (PSBPLC) display, we have obtained that the optimal content ratio of the polymer monomers RM257 and C12A is 1.225 according to the ideal bonding condition, and the total content of polymer monomers with the lowest hysteresis effect and residual birefringence is 7.5 wt.% through experiment. The polarising optical microscope and scanning electron microscope micrographs show that the polymer network structure of this ratio and this content is uniform, the spatial distribution is obvious, and the optical domain structure of the blue phase is uniform. The hysteresis effect and residual birefringence of the PSBPLC display are 0.84% and 0.55%, respectively. The research results have an important guiding significance for designing PSBPLC devices.

GRAPHICAL ABSTRACT

KEYWORDS:

• Polymer stabilised blue phase liquid crystal
• hysteresis effect
• residual birefringence
• polymer network

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the National Key R&D Program of China [Grant Number 2018YFB0703701] and the National Natural Science Foundation of China [Grant Number 61475042].