Surface localized polymer aligned liquid crystal lens

Surface localized polymer aligned liquid crystal lens.

The surface localized polymer alignment (SLPA) method allows complete control of the polar pretilt angle as a function of position in liquid crystal devices. In this work, a liquid crystal (LC) cylindrical lens is fabricated by the SLPA method. The focal length of the LC lens is set by the polymerization conditions, and can be varied by a non-segmented electrode. The LC lens does not require a ...

Micro-patterned photo-aligned ferroelectric liquid crystal Fresnel zone lens.

In this Letter, we disclose a fast switchable Fresnel zone lens (FZL) by confining the ferroelectric liquid crystals (FLCs) in multiple microscopically defined photo-aligned alignment domains. The photo-alignment (PA) offers good control on the anchoring energy (W) by mean of irradiation doses (ID) and thus excellent alignment for FLCs. Two operational modes of the FLCFZL, i.e., FOCUS/OFF and F...

Tunable electronic lens using a gradient polymer network liquid crystal

Tunable electronic lenses using gradient polymer network liquid crystal ~PNLC! cells were demonstrated. By changing the photomask pattern, both positive and negative lenses were fabricated. The advantages of such a PNLC lens are low operation voltage, large aperture size, and simple electrode design. To overcome the polarization dependence, stacking two orthogonal homogeneous PNLC cells is cons...

Spatial and Orientational Control of Liquid Crystal Alignment Using a Surface Localized Polymer Layer

A self-aligned multi-domain liquid-crystal display on polymer gratings in a vertically aligned configuration

Jae-Hong Park Yoonseuk Choi Tae-Young Yoon Chang-Jae Yu Sin-Doo Lee Abstract — We report on a new method of fabricating a vertically aligned multi-domain liquid-crystal display (LCD) using surface-relief gratings. A linear array of surface-relief gratings was produced by using a photosensitive polymer material coated on glass substrates by the illumination of the UV light through a photomask. T...