Patent ID: 6621534
Filing Date: 2003-09-16
Classification: B32B,E06B,G02F

Abstract:
A system of components including an ultra violet filter and a separate functional component for controlling light transmission, said separate functional component comprising:a film containing electrically controllable elements dispersed in a medium and configured to control light transmission, said electrically controllable elements being subject to photoreduction degradation and comprised of polarizing particles or liquid crystals associated with dichroic dyes; and two transparent layers positioned on opposite sides of said film with each transparent layer being configured to include at least one electrically conducting layer portion, wherein at least one of the two transparent layers is further configured to permit oxygen to permeate there through and into said film so as to slow down the photoreduction degradation occurring relative to said electrically controllable elements to add to the slow down of photoreduction degradation for the electrically controllable elements provided by the ultra violet filter.