Single Liquid Crystal Display Research Articles

Generation of Geometric Extra Phase and Accompanying Temporal Effects in Asymmetric Optically Compensated IPS-LCDs and FFS-LCDs

This paper reports the generation of an extra phase and the accompanying temporal effects in an asymmetric optically compensated in-pane-switching (IPS) liquid crystal (LC) system and a fringe-field-switching (FFS) liquid crystal display (LCD) exhibiting a twofold faster response speed in the switching-off process compared with that in single and symmetric IPS-LCDs and FFS LCDs for the first time. To explain the experimental results, we derived an approximate analytical formula for the optical output intensity that includes an extra phase advancement and conducted simulations to achieve normally black operation using a dynamic optical retarder.

Integral 3D display using multiple LCD panels and multi-image combining optical system.

We present a method to display an integral three-dimensional (3D) image without gaps between multiple display active areas by using multiple liquid crystal display (LCD) panels and multi-image combining optical systems (MICOS). We designed a MICOS to improve the resolution characteristics and decrease the luminance unevenness corresponding to the viewpoint. Furthermore, we developed a method for correcting the distortion of the integral 3D image by using image processing. We prototyped an integral 3D display using four 8K dual-green (8KDG) LCD panels and the improved MICOSs. The prototype display achieved to magnify the display area about 5.66 times more than when a single LCD panel was used.

Viewing angle controllable fringe and in-plane switching vertical alignment LCD

A viewing angle controllable fringe and in-plane switching vertical alignment liquid crystal display (LCD) structure has been proposed. To realise the change from wide viewing angle (WVA) to narrow viewing angle (NVA) in a single LCD panel, the bias voltage is applied on the common electrode, and NVA can decreases with the increasing bias voltage. In WVA mode, the viewing angle cone (contrast ratio larger than 1000:1) is almost 70° and the contrast ratio is larger than 100:1 in arbitrary azimuthal directions. In NVA mode, the viewing angle cone (10:1) can continuously and uniformly change from 40° to 20°.

Single Polarizer Liquid Crystal Display Mode with Fast Response

We propose a single polarizer liquid crystal display (LCD) with a fast response that was designed using a polarization-dependent microlens array fabricated by the planarization of a curved lens surface with a liquid crystalline polymer. The single polarizer LCD is operated by the polarization-dependent focusing properties of a microlens consisting of a circular stop-mask and complementary open mask. Fast response can be obtained by the planarized lens surface because distortions associated with applied electric fields and LC alignments observed in conventional curved lenses are eliminated.

Observation of accelerating parabolic beams

We report the first observation of accelerating parabolic beams. These accelerating parabolic beams are similar to the Airy beams because they exhibit the unusual ability to remain diffraction-free while having a quadratic transverse shift during propagation. The amplitude and phase masks required to generate these beams are encoded onto a single liquid crystal display. Experimental results agree well with theory.

Generation of helical Ince-Gaussian beams with a liquid-crystal display

We generate helical Ince-Gaussian (HIG) beams by using complex amplitude and phase masks encoded onto a liquid-crystal display (LCD). These beams display an intensity pattern consisting of elliptic rings, whose number and ellipticity can be controlled, and a phase exhibiting a number of in-line vortices, each with a unitary topological charge. We show experimental results that display the properties of these elliptic dark hollow beams. We introduce a novel interference technique for generating the object and reference beams by using a single LCD and show the vortex interference patterns. We expect that these HIG beams will be useful in optical trapping applications.

Hybrid LCD panel system and its color coding algorithm

A color liquid crystal display (LCD) panel typically used in consumer products is composed of R, G, and B subpixels. Due to the subpixel structure and color microfilters, a single LCD panel system (SLPS) using such a panel has a low resolution, low brightness, and a poor appearance of the individual color pixel elements. These problems are solved by having a three LCD panel system (TLPS) which is composed of three black/white (B/W) LCD panels. However, this system requires high cost and high hardware (H/W) complexity. We propose a new LCD system using B/W and color LCD panels called the hybrid LCD panel system (HLPS) to overcome the drawbacks of other types of LCD panel applications. Also, the associated color coding algorithm for maximizing the effect of the proposed system is developed. In spite of using the simplified H/W structure, little visual difference has been attained in comparison with the TLPS in the terms of the resolution and brightness, and the color fidelity is better than the SLPS. Among the three types of the LCD projector, the 7.34% light utilization efficiency of the HLPS is the highest. Also, the HLPS is compact and relatively inexpensive.