Search

We propose a vertical alignment liquid crystal cell controlled by double-side in-plane switching with a positive dielectric anisotropy liquid crystal material. In this structure, the pixel electrodes are interdigital electrodes, which are deposited on the bottom and top substrates parallel to each other. In the voltage-off state, the liquid crystal molecules are vertically aligned under the crossed polarizers; hence the cell appears to be dark. When an in-plane field is applied, the liquid crystal molecules tilt down to the left or right along the field direction, which is at 45° with respect to the input polarizer, giving rise to maximum transmission of the incident light. We fabricated the proposed cells, which show higher transmittance and lower driving voltage compared with the conventional vertical alignment configuration with a positive dielectric anisotropy liquid crystal. The improved electro-optical properties are due to the stronger in-plane field compared with the configuration having one-side electrode. In this device, the response time and viewing angle characteristics are almost the same as the conventional structure. [ABSTRACT FROM AUTHOR]

This study proposes a reflective dual-mode liquid crystal display (RD-LCD) that can be operated in memory mode or dynamic mode according to the image contents. The proposed RD-LCD needs three states to represent dark and bright states, while a general reflective liquid crystal display has two states. Nevertheless, a compensation structure that can obtain high contrast ratios in both dynamic and memory modes has been optimized. The proposed RD-LCD can be operated without internal backlighting, thus making it a candidate for real green display. [ABSTRACT FROM AUTHOR]