Patent ID: 6829511
Filing Date: 2004-12-07
Classification: E06B,G02F,G05B,H04L,Y04S

Abstract:
An electrical control system for controlling the transmittance of at least one variable transmission window having a variable transmittance medium and first and second electrodes electrically coupled to one another through the variable transmittance medium, the variable transmittance medium having a transmittance that varies in response to electrical energy applied thereto via the first and second electrodes, said control system comprising:a control circuit coupled to the first and second electrodes of the at least one variable transmission window for selectively varying the electrical energy applied across the electrodes to thereby vary the transmittance of the variable transmission window; a sensing circuit for sensing an abnormal electrical load condition across the first electrode, the variable transmittance medium, and the second electrode of the variable transmission window; and a security system interface coupled to receive an indication from said sensing circuit that an abnormal electrical load condition exists in the variable transmission window.