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US 6,829,511 B2Granted
System to control variable transmission windows having a security system interface
AssigneeGentex Corporation
InventorsJon H. Bechtel, David L. Poll
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AssigneeGentex Corporation
InventorsJon H. Bechtel, David L. Poll
Estimating the term…
An electrical control system is disclosed for controlling a plurality of variable transmittance windows. The electrical control system of the present invention comprises a master control circuit for supplying control signals representing transmittance levels for the variable transmission windows, and a plurality of window control circuits coupled to each of the master control circuit. Because the window control circuits can sense abnormal load conditions in the variable transmission windows, the system further includes an interface to a security system to inform of a potential intrusion. Each window control circuit controls the transmittance of at least one of the variable transmission windows in response to control signals received from the master control circuit.
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 building comprising:
A method of determining whether a security breach has occurred through the breakage or opening of a variable transmission window, the variable transmission window providing a current path when closed, where the current path passes through a pair of electrodes and a variable transmission medium of the variable transmission window and where the current path is used to selectively vary the transmission of the variable transmission window, the method comprising the steps of:
Dependencies are inferred from the claim text.