Development of a silicon liquid-crystal light valve for multimode operation

U. Efron, E. Weiner-Avnear, J. Grinberg, P. O. Braatz, M. J. Little, R. N. Schwartz

Research output: Other contributionpeer-review


The aim of this program has been to develop the silicon photoconductor liquid crystal light valve (LCLV) as a second-generation, higher-performance device, as well as to optimize the multimode operation of the liquid crystal. The latter effort was primarily aimed at allowing a full-performance CdS LCLV to be realized, given the switching-ratio limitation of this device, as well as to allow the silicon LCLV, when completed, to fully benefit from this development. This program has resulted in the successful development of a silicon LCLV in which we have solved the edge breakdown effect, developed a novel Si/SiO2 dielectric mirror, implemented a focusing-grid to improve resolution and scaled up the device from a 1 cm x 1 cm aperture to a 2 in. aperture device. This has resulted in a fast-response, high switching-ratio device approaching the resolution performance of the CdS light valve. The LC multimode operation has been successfully optimized, resulting in a practical demonstration of a back-slope-type operation applicable to the switching-ratio-limited CdS devices. Results of the theoretical model developed for the liquid crystal operation were in good agreement with experimental measurements.
Original languageEnglish GB
StatePublished - 1 Jul 1982
Externally publishedYes

Publication series

NameFinal Report, 1 Jan. 1978 - 28 Feb. 1982 Hughes Research Labs., Malibu, CA.


  • Electro-Optics
  • Liquid Crystals
  • Product Development
  • Silicon
  • Switching Circuits
  • Valves
  • Dielectrics
  • Display Devices
  • Electric Switches
  • Mirrors
  • Photoconductors


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