Title

A Controllable Viewing Angle Lcd With An Optically Isotropic Liquid Crystal

Abstract

An optically isotropic liquid crystal (LC) such as a blue phase LC or an optically isotropic nano-structured LC exhibits a very wide viewing angle because the induced birefringence is along the in-plane electric field. Utilizing such a material, we propose a liquid crystal display (LCD) whose viewing angle can be switched from wide view to narrow view using only one panel. In the device, each pixel is divided into two parts: a major pixel and a sub-pixel. The main pixels display the images while the sub-pixels control the viewing angle. In the main pixels, birefringence is induced by horizontal electric fields through inter-digital electrodes leading to a wide viewing angle, while in the sub-pixels, birefringence is induced by the vertical electric field so that phase retardation occurs only at oblique angles. As a result, the dark state (or contrast ratio) of the entire pixel can be controlled by the voltage of the sub-pixels. Such a switchable viewing angle LCD is attractive for protecting personal privacy. © 2010 IOP Publishing Ltd.

Publication Date

3-30-2010

Publication Title

Journal of Physics D: Applied Physics

Volume

43

Issue

14

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0022-3727/43/14/145502

Socpus ID

77949910079 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77949910079

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