Abstract

Contrast ratio is an important measure of the performance of an electrooptic display. From measurements of film brightness and transmittance, we determined contrast ratios of thin polymer films containing microdroplets of liquid crystalline material. Contrast ratios based on brightness were typically ~3 for all samples studied, whereas contrast ratios based on transmittance varied from ~20 to 200 depending on the sample. We explain these differences by analyzing the relations between the illumination geometries in the two measurements and the voltage-dependent multiple scattering of light which controls the electrooptic performance of the films. Effects of the spectral content of the light source and the response of the human eye on contrast ratio were also determined. The results presented here demonstrate the importance of standardizing procedures for measuring contrast ratios of these new liquid crystal films.

© 1987 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
A polarizer-free flexible and reflective electro-optical switch using dye-doped liquid crystal gels

Yi-Hsin Lin, Jhih-Ming Yang, Yan-Rung Lin, Shie-Chang Jeng, and Chi-Chang Liao
Opt. Express 16(3) 1777-1785 (2008)

High contrast ratio and compact-sized prism for DLP projection system

Yung-Chih Huang and Jui-Wen Pan
Opt. Express 22(14) 17016-17029 (2014)

High-Definition Imaging System Based on Spatial Light Modulators with Light-Scattering Mode

Hiroshi Kikuchi, Takanori Fujii, Masahiro Kawakita, Yoshiyuki Hirano, Hideo Fujikake, Fumio Sato, and Kuniharu Takizawa
Appl. Opt. 43(1) 132-142 (2004)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (2)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription