Projects / Programmes
Light modulation using LCD electrooptic light shutters
Code |
Science |
Field |
Subfield |
1.02.00 |
Natural sciences and mathematics |
Physics |
|
Code |
Science |
Field |
P260 |
Natural sciences and mathematics |
Condensed matter: electronic structure, electrical, magnetic and optical properties, supraconductors, magnetic resonance, relaxation, spectroscopy |
light modulation, electrooptic light shutter, liquid crystals
Researchers (8)
Organisations (1)
no. |
Code |
Research organisation |
City |
Registration number |
No. of publicationsNo. of publications |
1. |
0106 |
Jožef Stefan Institute |
Ljubljana |
5051606000 |
90,664 |
Abstract
The goal of the proposed applied research program is the reduction of the angular dependence of the light attenuation of the LCD light shutters, which still remains one of the important problems of these electrooptical elements. The R&D program envisages the development of the new concept of the LCD light shutters, based on the specific highly-twisted LC molecular structure in the LCD light shutter and specific relative orientation of the incident light polarization with respect to the alignment of the LC molecules on the input boundary surface. Such a construction allows for very high LC molecular orientation symmetry around the normal to the LCD light shutter plane, which in turn results in the construction of the LCD light shutters, the optical performances (i.e. light attenuation) of which can be made mutually complementary so that excellent angular compensation of the light attenuation can be reached. The high angular symmetry of the optical performances, allowed by the new LCD light shutter concept, can also result in efficient angular compensation using the birefringent compensation layers. The research program is based on the computer modeling of the optical properties of the multilayer structure composed of optical-birefringent layers, polarizing films and thin, specifically oriented LC layers. The achieved results will be experimentally evaluated using model LCD light shutters. Preliminary analyses show that one can obtain excellent angular compensation, which can meet and even surpass all the requirements for the optical elements used for personal protection applications, as set forth by the new international standard EN 379.