Lerner, David, Littenberg, Krumholz & Mentlik, LLP
Photovoltaic powering and control system for electrochromic windows
 A sealed insulated glass unit is provided with an electrochromic device for modulating light passing through the unit. The electrochromic device is controlled from outside the unit by a remote control electrically unconnected to the device. Circuitry within the unit may be magnetically controlled from outside. The electrochromic device is powered by a photovoltaic cells. The photovoltaic cells may be positioned so that at least a part of the light incident on the cell passes through the electrochromic device, providing a form of feedback control. A variable resistance placed in parallel with the electrochromic element is used to control the response of the electrochromic element to changes in output of the photovoltaic cell. 
Minnesota Mining and Manufacturing Company
G E E
G02F E06B E06B
inventional additional additional
Hermann N. John E. Stephen C. Lech A.
Volltrauer Van Dine Schulz Michalski