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Proceedings Paper

Use of liquid crystal display technology in ocular prosthesis
Author(s): Desmond L. Seekola; F. Wilhelm Leuschner
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Paper Abstract

Use of liquid crystal display technology for ocular prosthesis was recently proposed. Liquid crystal light valves are used for the purpose of light modulation to control pupil size proportional to incident light intensity. In the current study two different types of liquid crystal technology are tested for use in a prosthetic eye. The first type is the conventional twisted nematic (TN) cell. The second type of technology is a color dispersion system consisting of liquid crystal droplets in a polymer binder. Because of the principle of operation of the prosthetic device, in the off state the display should block light and appear black. This is easily achieved with TN cells. For the dispersed technology, a colored dispersed system using a black dichroic dye is used so that the display is black in the off state. The response of the two types of technology are measured and compared for ocular prosthesis. Factors such as photostability, battery life, alternate modes of operation, and the use of other types of liquid crystal display technology are also discussed.

Paper Details

Date Published: 24 April 1995
PDF: 7 pages
Proc. SPIE 2408, Liquid Crystal Materials, Devices, and Displays, (24 April 1995); doi: 10.1117/12.207502
Show Author Affiliations
Desmond L. Seekola, Univ. of Pretoria (South Africa)
F. Wilhelm Leuschner, Univ. of Pretoria (South Africa)

Published in SPIE Proceedings Vol. 2408:
Liquid Crystal Materials, Devices, and Displays
Ranganathan Shashidhar; Uzi Efron, Editor(s)

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