Single electro-optic curve for RGB colours in blue-phase liquid crystal display

ABSTRACT

The double-layer penetration electrode structure is proposed to obtain the low-operating voltage blue-phase liquid crystal display (BPLCD) with single electro-optic curve for red-green-blue (RGB) colours in every pixel, which is more suitable for the field-sequential-colour display. The different influences of electrode’s parameters and driving methods on the electro-optical properties of the proposed BPLCD are investigated. The results demonstrate that the operating voltage can be reduced from 53.80 V to 23.00 V for red colour. Besides, the coincident voltage-dependent transmittance curves for RGB colours are obtained by adjusting the applied voltage of sub-electrode. Thus, RGB lights can pass through every pixel with single electro-optic curve, which is good for resolution enhancement and single gamma driving. Besides, the maximum gamma shift of the proposed BPLCD is less than 0.1099 at 60° polar angle for the red colour, and the gamma shift difference between red and blue colours is only 0.0542. If the high dielectric constant material is used as the protrusion, the operating voltage can be further decreased, which is close to that of the BPLCD with wall-shaped electrode structure.

GRAPHICAL ABSTRACT

KEYWORDS:

• Blue phase liquid crystal display
• field-sequential-colour display
• electro-optic curve
• gamma shift

Acknowledgments

The authors would like to thank Haiwei Chen (Group of Prof. Shin-Tson Wu, University of Central Florida, USA) for the help.

Disclosure statement

No potential conflict of interest was reported by the authors.

Supplementary material

Supplemental data for this article can be accessed here.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [Grant Numbers 61475042, 11304074 and 11274088], the Natural Science Foundation of Hebei Province [Grant Numbers A2015202320 and GCC2014048].