The subject of the invention is an electrically controllable system having variable light scattering and/or transmission, comprising a functional film (1, 21) provided with electrically conducting layers (2, 3, 22, 23), the said film having active elements in the form of polarizing particles, or of liquid...http://www.google.com.au/patents/US6486928?utm_source=gb-gplus-sharePatent US6486928 - ELECTRICALLY CONTROLLABLE SYSTEM HAVING A SEPARATE FUNCTIONAL COMPONENT FOR CONTROLLING LIGHT TRANSMISSION THAT INCLUDES AT LEAST ONE TRANSPARENT LAYER SLOWING PHOTO REDUCTION DEGRADATION OF AN ACTIVE ELEMENT
