Modelling and Electro-Optical Testing of Suspended Particle Devices Articles uri icon

publication date

  • November 2008

start page

  • 1483

end page

  • 1487

issue

  • 11

volume

  • 92

International Standard Serial Number (ISSN)

  • 0927-0248

Electronic International Standard Serial Number (EISSN)

  • 1879-3398

abstract

  • Some smart windows make use of suspended particle devices (SPDs) which are made of charged rod-shape particles that change their orientation in an applied electric field, thereby allowing transmittance control. In this work, the electro-optical behaviour of a commercial SPD is analyzed. Impedance analysis shows characteristics similar to those of a Randles circuit, and a modified equivalent circuit is proposed and experimentally validated. Intermediate levels of transmittance are obtained using a customized field programmable gate array (FPGA)-based electrical circuit. Finally, measurements are taken to check the applicability of the SPD device and control system in smart glazing or photonic applications.